Cooking appliance and method of controlling same

Abstract

This cooking appliance includes: a cooking plate; a vessel sensing circuit including a vessel sensing coil and at least one switch that allows a flow of an input current input to the vessel sensing coil and a flow of an output current output from the vessel sensing coil, wherein the vessel sensing circuit determines the position or type of a cooking vessel on the cooking plate while the at least one switch is controlled to allow the flow of the input current and the flow of the output current; a heating coil which is arranged below the cooking plate and generates a magnetic field capable of expanding to the cooking plate and the vessel sensing circuit on the basis of the supply of driving power; and a control unit that controls the at least one switch to allow the flow of the input current and the output current for a predetermined time at every predetermined period corresponding to a driving frequency of the driving power while the driving power is supplied to the heating coil.

Description

Cooking appliances and methods for controlling cooking appliances

[0001] The present disclosure relates to a cooking appliance including a container detection circuit for detecting a cooking container and a method for controlling the cooking appliance.

[0002] A cooking appliance is a device designed to heat and cook food or other food items. It can provide various cooking-related functions, such as heating, defrosting, drying, and sterilizing the food. Cooking appliances may include cooktops, which use electricity or gas to heat cooking containers containing food.

[0003] The cooking appliance may include a device that uses eddy currents generated by applying driving power to a heating coil to heat a cooking vessel.

[0004] Recently, a technology has been developed that can include a container detection circuit that detects the placement of a container on a cooking plate, and determines the position of a cooking container on the cooking plate or the type of cooking container based on a signal output from the container detection circuit.

[0005] However, there is a problem that the magnetic field or induced electromotive force generated when a driving current is applied to a heating coil to heat a cooking vessel affects the vessel detection circuit, making it impossible to accurately detect the cooking vessel on the cooking plate.

[0006] The present disclosure can provide a cooking appliance and a control method for the cooking appliance that can detect a cooking container on a cooking plate without being affected by an induced electromotive force generated from a heating coil.

[0007] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0008] According to one embodiment of the present disclosure, a cooking appliance may include: a cooking plate; a container detection circuit including a container detection coil and at least one switch allowing a flow of input current input to the container detection coil and a flow of output current output from the container detection coil, wherein the container detection circuit determines a position or type of a cooking plate on the cooking plate while the at least one switch is controlled to allow a flow of input current and a flow of output current; a heating coil disposed under the cooking plate, the heating coil generating a magnetic field that can extend to the cooking plate and the container detection circuit based on a supply of driving power; and a control unit controlling the at least one switch to allow a flow of input current and an output current for a predetermined period of time at predetermined cycles corresponding to a driving frequency of the driving power while the driving power is supplied to the heating coil.

[0009] The container detection circuit may further include an A / D converter that converts the value of the output current into a digital signal.

[0010] The container detection coil may include a plurality of container detection coils, and the container detection circuit may further include a multiplexer that sequentially inputs input currents corresponding to each of the plurality of container detection coils to each of the plurality of container detection coils.

[0011] The plurality of container detection coils include a first container detection coil and a second container detection coil, and the multiplexer can sequentially input a second input current corresponding to the second container detection coil to the second container detection coil after inputting a first input current corresponding to the first container detection coil to the first container detection coil.

[0012] The container detection coil may include a plurality of container detection coils, and the container detection circuit may further include a multiplexer that sequentially outputs output currents corresponding to each of the plurality of container detection coils to an A / D converter.

[0013] The plurality of container detection coils include a first container detection coil and a second container detection coil, and the multiplexer can sequentially output a second output current corresponding to the second container detection coil to the A / D converter after outputting a first output current corresponding to the first container detection coil to the A / D converter.

[0014] The container detection circuit further includes a zener diode circuit connecting a first node through which an input current flows and a second node through which an output current flows; the zener diode circuit may include a first zener diode having a first cathode connected to the first node and a first anode connected to a ground node; and a second zener diode having a second cathode connected to the second node and a second anode connected to the ground node.

[0015] The control unit can determine a predetermined cycle based on the driving frequency.

[0016] The control unit can control at least one switch based on receiving a heating execution command for heating a cooking vessel on a cooking plate.

[0017] The present disclosure further includes a coil assembly disposed under the cooking plate, the coil assembly including a first layer, an insulating layer disposed under the first layer, and a second layer disposed under the insulating layer, wherein the container detection coil may be disposed in the first layer, and the heating coil may be disposed in the second layer. A control method for a cooking appliance according to one embodiment of the present disclosure includes a cooking plate, a container detection coil, and a container detection circuit including at least one switch allowing a flow of input current input to the container detection coil and a flow of output current output from the container detection coil, wherein the container detection circuit determines a position or type of a cooking container on the cooking plate while the at least one switch is controlled to allow a flow of input current and a flow of output current, and a heating coil disposed under the cooking plate, the heating coil generating a magnetic field that can be extended to the cooking plate and the container detection circuit based on a supply of driving power, the control method comprising: supplying driving power to the heating coil; and controlling at least one switch to allow the flow of input current and output current for a predetermined period of time corresponding to the driving frequency of the driving power while the driving power is supplied to the heating coil;

[0018] The container detection circuit may further include an A / D converter, and the control method of the cooking appliance may further include converting the value of the output current into a digital signal using the A / D converter.

[0019] The container detection coil includes a plurality of container detection coils, the container detection circuit further includes a multiplexer, and the control method of the cooking appliance may further include controlling the multiplexer to sequentially input input currents corresponding to each of the plurality of container detection coils to each of the plurality of container detection coils.

[0020] The plurality of container detection coils include a first container detection coil and a second container detection coil, and the control method of the cooking appliance may further include controlling the multiplexer to sequentially input a second input current corresponding to the second container detection coil to the second container detection coil after inputting a first input current corresponding to the first container detection coil to the first container detection coil.

[0021] The container detection coil includes a plurality of container detection coils, the container detection circuit further includes a multiplexer, and the control method of the cooking appliance may further include controlling the multiplexer to sequentially output output currents corresponding to each of the plurality of container detection coils to an A / D converter.

[0022] According to the present disclosure, it is possible to detect a cooking vessel on a cooking plate without being affected by an induced electromotive force generated from a heating coil.

[0023] According to the present disclosure, the number of container detection coils and heating coils installed in a cooking appliance can be maximized.

[0024] FIG. 1 is a drawing showing a cooking appliance viewed from above according to one embodiment.

[0025] FIG. 2 is a drawing showing a cooking plate of a cooking appliance separated according to one embodiment.

[0026] FIG. 3 is a drawing showing a separated coil assembly of a cooking appliance according to one embodiment.

[0027] FIG. 4 is a drawing showing a separated state of a coil assembly mounting plate on which a coil assembly of a cooking appliance according to one embodiment can be mounted.

[0028] Figure 5 is a drawing for explaining the principle of how the induced magnetic field generated when driving the heating coil affects the container detection coil.

[0029] Figure 6 illustrates a control block diagram of a cooking appliance according to one embodiment.

[0030] FIG. 7 is a drawing for explaining a method of applying driving power to a heating coil and a container detection coil according to one embodiment.

[0031] FIG. 8 is a drawing for explaining a method of applying an input current to a container detection coil and obtaining an output current output from the container detection coil according to one embodiment.

[0032] FIG. 9 is a diagram for explaining a method of sequentially applying input currents to a container detection coil using a multiplexer or sequentially obtaining output currents using a multiplexer according to one embodiment.

[0033] FIG. 10 illustrates a circuit diagram of a container detection circuit according to one embodiment.

[0034] FIG. 11 is a diagram illustrating a method for determining a cycle for turning on a switch of a container detection circuit based on a driving frequency applied to a heating coil according to one embodiment.

[0035] FIG. 12 illustrates a circuit diagram of a container detection circuit further including a Zener diode in the container detection circuit of FIG. 10.

[0036] Fig. 13 is a flowchart for explaining a method for controlling a cooking appliance according to one embodiment.

[0037] FIG. 14 is a drawing illustrating a coil assembly according to one embodiment.

[0038] It should be understood that the various embodiments and terms used in this document are not intended to limit the technical features described in this document to specific embodiments, but rather to include various modifications, equivalents, or substitutes of the embodiments.

[0039] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0040] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0041] In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof.

[0042] The term "and / or" includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0043] The terms "part," "module," and "member" may be implemented in hardware or software. Depending on the embodiments, multiple "parts," "modules," or "members" may be implemented as a single component, or a single "part," "module," or "member" may include multiple components.

[0044] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0045] When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0046] The terms "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in this document, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0047] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0048] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0049] Meanwhile, the terms "front", "back", "left", "right", "upper", "lower", etc. used in the following description are defined based on the drawing, but the shape and position of each component are not limited by the above terms. For example, the front side may be defined as the +X side, and the rear side may be defined as the -X side. For example, based on the drawing, the right side may be defined as the +Y side, and the left side may be defined as the -Y side. For example, based on the drawing, the upper side may be defined as the +Z side, and the lower side may be defined as the -Z side.

[0050] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0051] FIG. 1 is a drawing showing a cooking appliance viewed from above according to one embodiment.

[0052] Referring to FIG. 1, a cooking appliance may be configured to cook food. The cooking appliance may be configured to heat food.

[0053] A cooking appliance (1) may include a cooking plate (20) on which a cooking vessel (CV) may be placed. For example, the cooking plate (20) may have a generally flat shape. For example, the cooking plate (20) may include tempered glass such as ceramic glass.

[0054] The cooking appliance (1) may include a user interface device (51) provided on the cooking plate (20). The user interface device (51) may include an input interface (51a, see FIG. 6) provided to receive commands from a user and an output interface (51b, see FIG. 6) provided to display various information of the cooking appliance (1). The user interface device (51) may be provided as an area through which at least a portion of a display assembly (50) described later is transparent to receive commands from a user or display information to a user.

[0055] The cooking appliance (1) may include a lower plate (30) positioned below the cooking plate (20). The lower plate (30) may be provided at the lower portion of the cooking plate (20). The lower plate (30) may be provided to have a square shape. A space may be formed inside the lower plate (30) in which various components of the cooking appliance (1) may be positioned.

[0056] In the drawing, the cooking appliance (1) is depicted as an induction electric cooktop, but the present disclosure is not limited thereto. As long as the cooking appliance (1) can heat a cooking vessel (CV), the type of the cooking appliance (1) is not limited. For example, the cooking appliance (1) may be provided as a gas range, a highlighter, a hybrid, or an oven. However, in the following description, the cooking appliance (1) is described as being an induction electric cooktop.

[0057] FIG. 2 is a drawing showing a cooking plate of a cooking appliance separated according to one embodiment.

[0058] Referring to FIG. 2, the cooking plate (20) may include cooking areas (CA1, CA2). The cooking areas (CA1, CA2) may be provided in multiple numbers. The multiple cooking areas (CA1, CA2) may include a first cooking area (CA1) and a second cooking area (CA2).

[0059] The first cooking area (CA1) may include a cooking area corresponding to the first coil assembly (40a).

[0060] The second cooking area (CA2) may include a cooking area corresponding to the second coil assembly (40b).

[0061] In the drawing, two cooking areas are depicted, but in various embodiments, the cooking area may include three or more cooking areas. In addition, the first cooking area (CA1) and the second cooking area (CA2) may be referred to as one cooking area. In addition, the entire cooking plate (20) may be referred to as one cooking area. However, for convenience of explanation, the cooking plate (20) is described below as including the first cooking area (CA1) and the second cooking area (CA2).

[0062] The cooking appliance (1) may include a coil assembly (40) and a display assembly (50).

[0063] A coil assembly (40) and a display assembly (50) can be placed in the space inside the lower plate (30).

[0064] The coil assembly (40) may include a first coil assembly (40a) and / or a second coil assembly (40b). For example, the coil assembly (40) may include a first coil assembly (40a) positioned below a first cooking area (CA1) and a second coil assembly (40b) positioned below a second cooking area (CA2).

[0065] Each of the first coil assembly (40a) and the second coil assembly (40b) may be provided to have a square shape. For example, the first coil assembly (40a) and the second coil assembly (40b) may be provided to have a square shape.

[0066] However, the shapes of the first coil assembly and the second coil assembly are not limited thereto and may be provided in various shapes. For example, each of the first coil assembly and the second coil assembly may be provided to have a circular shape.

[0067] The display assembly (50) may be configured to implement an output interface (51b). The display assembly (50) may be arranged to correspond to the output interface (51b). For example, the display assembly (50) may be configured as a printed board assembly (PBA) including a display panel, switching elements, integrated circuit elements, etc., and a printed circuit board (PCB) on which these elements are installed. When the display assembly (50) is a display panel, various pieces of information output through the display panel may be displayed through the output interface (51b).

[0068] FIG. 3 is a drawing showing a separated coil assembly of a cooking appliance according to one embodiment.

[0069] FIG. 4 is a drawing showing a separated state of a coil assembly mounting plate on which a coil assembly of a cooking appliance according to one embodiment can be mounted.

[0070] Referring to FIGS. 3 and 4, the cooking appliance (1) may include a coil assembly mounting plate (36). The coil assembly mounting plate (36) may be provided inside the lower plate (30) to mount the coil assembly (40) under the coil assembly (40). The coil assembly mounting plate (36) may be provided on top of the printed circuit board assembly (60).

[0071] The cooking device (1) may include a printed circuit board assembly (60). The printed circuit board assembly (60) may be configured to implement circuits for various operations of the cooking device (1). For example, the printed circuit board assembly (60) may include a control unit (200, see FIG. 6), an A / D converter (120, see FIG. 6), and a multiplexer (130, see FIG. 6), which will be described later.

[0072] The cooking appliance (1) may include a plurality of electrical components (11). The plurality of electrical components (11) may be provided below the printed circuit board assembly (60). The plurality of electrical components (11) may be provided to apply driving current to various components of the cooking appliance (1). For example, the plurality of electrical components (11) may include a power supply unit (300, see FIG. 6) to be described later.

[0073] Although the above-described printed circuit board assembly (60) and the plurality of electrical components (11) have been described as separate configurations, the printed circuit board assembly (60) and the plurality of electrical components (11) may be implemented as one circuit for various operations of the cooking appliance (1).

[0074] Figure 5 is a drawing for explaining the principle by which a magnetic field or induced electromotive force generated when driving a heating coil affects a container detection coil.

[0075] Referring to FIG. 5, as described above, the coil assembly (40) may include a first coil assembly (40a) and a second coil assembly (40b), and each of the first coil assembly (40a) and the second coil assembly (40b) may include at least one container detection coil (41) and / or at least one heating coil (42).

[0076] As shown in Fig. 5, when a driving current is applied to the wound conductor, the heating coil (42) generates a magnetic field (B) that passes through the inside of the heating coil (42) according to Ampere's law.

[0077] At this time, the magnetic field (B) generated in the heating coil (42) passes through the bottom surface of the cooking vessel (CV). The driving current applied to the heating coil (42) is an alternating current whose direction changes over time. Accordingly, the magnetic field (B) generated in the heating coil (42) also changes over time.

[0078] That is, when a temporally varying magnetic field (B) passes through the interior of the heating coil (42), a current that rotates around the magnetic field is generated inside the bottom surface of the cooking vessel (CV).

[0079] Here, the current rotating around the magnetic field (B) is a current formed by a voltage generated in a direction to prevent a change in the magnetic field (B) of the heating coil (42), and is called an eddy current (EI).

[0080] In this way, the bottom of the cooking vessel (CV) is heated by eddy current (EI).

[0081] In other words, when an eddy current (EI) flows through a cooking vessel (CV) having electrical resistance, heat is generated according to Ohm's law, and the cooking vessel (CV) can be heated as a result.

[0082] Here, the phenomenon in which a current is induced by a magnetic field (B) that changes over time is called an electromagnetic induction phenomenon. In this way, the cooking device (1) can heat the cooking vessel (CV) by applying a driving current to the heating coil (42) and utilizing the magnetic field (B) generated by the heating coil (42).

[0083] The heating coil (42) illustrated in Fig. 5 is depicted as having a square shape, but may be provided in various shapes. For example, the heating coil (42) may be provided in a circular shape.

[0084] The container detection coil (41) can be placed under the cooking plate (20) to determine the position of the cooking vessel (CV) on the cooking plate (20) or to determine the type of the cooking vessel (CV) on the cooking plate (20).

[0085] When an input current is input to the container detection coil (41), an output current can be output from the container detection coil (41). The cooking appliance (1) can detect a cooking container (CV) on the cooking plate (20) based on the output current output from the container detection coil (41).

[0086] Detecting a cooking vessel (CV) on a cooking plate (20) may include an A / D converter (120) converting a signal of an output current output from a container detection coil (41) into a digital signal, and a control unit (200, see FIG. 6) using the converted digital signal to determine the position of the cooking vessel (CV) on the cooking plate (20) or determine the type of the cooking vessel (CV) on the cooking plate (20).

[0087] For example, to detect a cooking vessel (CV) on a cooking plate (20), an A / D converter (120) converts a signal of an output current output from a container detection coil (41) into a digital signal, and a control unit (200, see FIG. 6) obtains information on the phase of the output current and information on the impedance of the container heating coil (41) using the converted digital signal, and based on the information on the phase of the output current and the information on the impedance of the container heating coil (41), the position of the cooking vessel (CV) on the cooking plate (20) or the type of the cooking vessel (CV) on the cooking plate (20) can be determined.

[0088] However, when a magnetic field (B) generated in the heating coil (42) or an induced electromotive force generated by an electromagnetic induction phenomenon is applied to the container detection coil (41), detection of the cooking container (CV) on the cooking plate (20) through the container detection coil (41) may not be performed accurately.

[0089] Therefore, it is necessary to prevent the induced electromotive force generated by the magnetic field (B) generated in the heating coil (42) or the electromagnetic induction phenomenon from being applied to the container detection coil (41). According to the present disclosure, a method for preventing the induced electromotive force generated by the magnetic field (B) generated in the heating coil (42) or the electromagnetic induction phenomenon from being applied to the container detection coil (41) is described below.

[0090] Figure 6 illustrates a control block diagram of a cooking appliance according to one embodiment.

[0091] Referring to FIG. 6, a cooking appliance (1) according to one embodiment may include a container detection circuit (100), a power supply unit (300), a user interface device (51), and / or a control unit (200).

[0092] The container detection circuit (100) may include a container detection coil (41), a switching unit (110), an A / D converter (120), and / or a multiplexer (130).

[0093] When a driving current is applied to the container detection circuit (100) from the power supply unit (300), an input current can be input to the container detection coil (41).

[0094] The container detection coil (41) may include a plurality of container detection coils.

[0095] The switching unit (110) can allow or block the flow of input current input to the container detection coil (41) or the flow of output current output from the container detection coil (41).

[0096] The control unit (200) can control the switching unit (110) to allow or block the flow of input current to the container detection coil (41).

[0097] The control unit (200) can control the switching unit (110) to allow or block the flow of output current output from the container detection coil (41).

[0098] The A / D converter (120) can convert the signal of the output current output from the container detection coil (41) into a digital signal. For example, the analog signal of the output current output from the container detection coil (41) can be converted into a digital signal to detect the cooking container (CV) on the cooking plate (20).

[0099] The A / D converter (120) can convert the signal of the output current output from the container detection coil (41) into a digital signal and then transmit the converted digital signal to the control unit (200). The control unit (200) can detect the cooking container (CV) on the cooking plate (20) using the digital signal received from the A / D converter (120).

[0100] The multiplexer (130) can input the input currents input to the plurality of container detection coils to each of the plurality of container detection coils.

[0101] The multiplexer (130) can output output currents from multiple container detection coils to the A / D converter (120).

[0102] The multiplexer (130) may include a plurality of multiplexers. For example, the multiplexer (130) may include a multiplexer for inputting input currents input to a plurality of container detection coils to each of the plurality of container detection coils, and a multiplexer for outputting output currents output from the plurality of container detection coils to the A / D converter (120).

[0103] The power supply unit (300) can apply driving current to various components of the cooking appliance (1).

[0104] The power supply unit (300) may include an EMI filter that converts AC current supplied from a commercial power source into DC current, removes noise from AC current supplied from a commercial power source, a power factor correction circuit (PFC) for compensating for the power factor of the AC current, a converter that converts AC current supplied from a commercial power source into DC current through a switching operation, an output capacitor to which DC current is applied, and / or an inverter that converts DC current back into AC current through a switching operation.

[0105] The control unit (200) can control the power supply unit (300) so that driving current is applied to various components of the cooking appliance (1). For example, the control unit (200) can control the power supply unit (300) so that driving current is applied to the container detection circuit (100), the heating coil, and / or the user interface device (51).

[0106] The user interface device (51) can enable interaction between the user and the cooking appliance (1).

[0107] The user interface device (51) may include an output interface (51b) and an input interface (51a).

[0108] The output interface (51b) can transmit various information related to the operation of the cooking appliance (1) to the user by generating sensory information.

[0109] For example, the output interface (51b) can transmit information related to the settings of the cooking appliance (1) and the operation of the cooking appliance (1) to the user. Information related to the operation of the cooking appliance (1) can be output through a display, an indicator, and / or a voice. The output interface (51b) can include, for example, a liquid crystal display (LCD) panel, an indicator, a light emitting diode (LED) panel, a speaker, etc.

[0110] In one embodiment, the output interface (51b) can output sensory information (e.g., visual information, auditory information, etc.) related to the control of the cooking appliance (1).

[0111] The input interface (51a) can convert sensory information received from the user into an electrical signal.

[0112] If the user interface device (51) includes a touch screen display, the touch screen display may be an example of an output interface (51b) and an input interface (51a).

[0113] The input interface (51a) may include an input device (e.g., a button, a knob, etc.) that receives user input for controlling the operation of the cooking appliance (1).

[0114] Each button may include a visual indicator (e.g., text, an icon, etc.) that indicates its function.

[0115] The input interface (51a) may include, for example, a tact switch, a push switch, a slide switch, a toggle switch, a micro switch, a touch switch, a touch pad, a touch screen, a jog dial, and / or a microphone.

[0116] In the present disclosure, 'button' may be replaced with a UI element (User Interface Element), a tact switch, a push switch, a slide switch, a toggle switch, a micro switch, a touch switch, a touch pad, a touch screen, a jog dial, and / or a microphone.

[0117] The cooking appliance (1) can process user input received through the user interface device (51) and output information related to the cooking appliance (1) through the user interface device (51).

[0118] The control unit (200) can control the operation of the cooking appliance (1) based on user input received through the user interface device (51).

[0119] The control unit (200) may include a processor (210) that controls the operation of the cooking appliance (1) and a memory (220) that stores a program and data for controlling the operation of the cooking appliance (1).

[0120] The memory (220) can store data required for various embodiments. Depending on the data storage purpose, the memory (220) may be implemented as a memory embedded in the cooking appliance or as a memory detachable from the cooking appliance. For example, data for operating the cooking appliance may be stored in a memory embedded in the cooking appliance, and data for expanding the cooking appliance's functions may be stored in a memory detachable from the cooking appliance. Meanwhile, in the case of memory embedded in the cooking appliance, it may be implemented as at least one of volatile memory (e.g., dynamic RAM (DRAM), static RAM (SRAM), or synchronous dynamic RAM (SDRAM)), non-volatile memory (e.g., one time programmable ROM (OTPROM), programmable ROM (PROM), erasable and programmable ROM (EPROM), electrically erasable and programmable ROM (EEPROM), mask ROM, flash ROM, flash memory (e.g., NAND flash or NOR flash), hard drive, or solid state drive (SSD)). In addition, in the case of memory that can be detachably attached to the cooking appliance (1), it may be implemented in the form of a memory card (e.g., compact flash (CF), secure digital (SD), micro secure digital (Micro-SD), mini secure digital (Mini-SD), extreme digital (xD), multi-media card (MMC), etc.), external memory that can be connected to a USB port (e.g., USB memory), etc.

[0121] The processor (210) controls the overall operation of the cooking appliance (1). Specifically, the processor (210) may be connected to each component of the cooking appliance (1) (e.g., the container detection circuit (100), the power supply unit (300), and / or the user interface device (51)) to control the overall operation of the cooking appliance (1). For example, the processor (210) may be electrically connected to the memory (220) to control the overall operation of the cooking appliance (1). The processor (210) may be composed of one or more processors (210).

[0122] The processor (210) can perform operations of the cooking appliance according to various embodiments by executing at least one instruction stored in the memory (220).

[0123] The processor (210) may include one or more of a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an APU (Accelerated Processing Unit), a MIC (Many Integrated Core), a DSP (Digital Signal Processor), an NPU (Neural Processing Unit), a hardware accelerator, or a machine learning accelerator. The processor (210) may control one or any combination of other components of the cooking appliance (1), and may perform operations or data processing related to communication. The processor (210) may execute at least one program or instruction stored in the memory (220). For example, the processor (210) may perform a method according to at least one embodiment of the present disclosure by executing at least one instruction stored in the memory (220).

[0124] FIG. 7 is a drawing for explaining a method of applying driving power to a heating coil and a container detection coil according to one embodiment.

[0125] Referring to FIG. 7, the control unit (200) can control the power supply unit (300) so that a driving current is applied to the heating coil (42) and / or the container detection coil (41).

[0126] For example, the control unit (200) can control the power supply unit (300) so that a first driving current (I1) for driving the heating coil (42) is applied to the heating coil (42).

[0127] As another example, the control unit (200) can control the power supply unit (300) so that the second driving current (I2) required to detect a cooking vessel (CV) on the cooking plate (20) is applied to the vessel detection circuit (100).

[0128] Driving the heating coil (42) may include applying a first driving current (I1) to the heating coil (42) necessary to heat a cooking vessel (CV) on the cooking plate (20) via the heating coil (42).

[0129] The first driving current (I1) applied to the heating coil (42) may have a current value greater than the second driving current (I2).

[0130] That is, in order to drive the heating coil (42), a first driving current (I1) greater than the second driving current (I2) must be applied to the heating coil (42).

[0131] Due to this, when detecting a cooking vessel (CV) on a cooking plate (20) through a container detection circuit (100) while driving a heating coil (42), a magnetic field (B) generated by the first driving current applied to the heating coil (42) and an induced electromotive force generated by an electromagnetic induction phenomenon are induced in the container detection circuit (100), so that accurate detection of the cooking vessel (CV) on the cooking plate (20) may not be performed.

[0132] In addition, excessive induced electromotive force may be induced in each component of the container detection circuit (100), which may cause a failure of each component of the container detection circuit (100).

[0133] Therefore, when detecting a cooking vessel (CV) on a cooking plate (20) through a vessel detection circuit (100), it is necessary to prevent the magnetic field (B) generated from the heating coil (42) and the induced electromotive force generated by the electromagnetic induction phenomenon from being induced in the vessel detection circuit (100).

[0134] Hereinafter, according to the present disclosure, a method for preventing a magnetic field (B) and an induced electromotive force generated from a heating coil (42) from being induced in a container detection circuit (100) when detecting a cooking container (CV) on a cooking plate (20) through a container detection circuit (100) is described.

[0135] FIG. 8 is a drawing for explaining a method of applying an input current to a container detection coil and obtaining an output current output from the container detection coil according to one embodiment.

[0136] Referring to FIG. 8, the container detection circuit (100) may include an A / D converter (120), a plurality of switching units (110a, 110b) and / or a plurality of container detection coils (41a, 41b).

[0137] The plurality of switching units (110a, 110b) may include a first switching unit (110a) and a second switching unit (110b). The plurality of container detection coils (41a, 41b) may include a first container detection coil (41a) and a second container detection coil (41b).

[0138] The number of switching units and the number of container detection coils according to the present disclosure are not limited to those illustrated in FIG. 8, and the number of switching units and the number of container detection coils may each be three or more according to various embodiments. However, for convenience of explanation, the number of switching units and the number of container detection coils are described as two.

[0139] A first input current (Iin1) can be input to the first container detection coil (41a). A first output current (Iout1) can be output from the first container detection coil (41a).

[0140] For example, the control unit (200) can control the power supply unit (300) so that a second driving current (I2) is applied to the container detection circuit (100). As a result, a first input current (Iin1) can be input to the first container detection coil (41a).

[0141] A second input current (Iin2) can be input to the second container detection coil (41b). A first output current (Iout2) can be output from the second container detection coil (412).

[0142] For example, the control unit (200) can control the power supply unit (300) so that a second driving current (I2) is applied to the container detection circuit (100). As a result, a second input current (Iin2) can be input to the second container detection coil (41b).

[0143] The first switching unit (110a) can allow or block the flow of the first input current (Iin1) input to the first container detection coil (41a) or the flow of the first output current (Iout1) output from the first container detection coil (41a).

[0144] The second switching unit (110b) can allow or block the flow of the second input current (Iin2) input to the second container detection coil (41b) or the flow of the second output current (Iout2) output from the second container detection coil (41b).

[0145] The A / D converter (120) can convert the output current signal into a digital signal.

[0146] For example, the A / D converter (120) can convert an analog signal of the first output current (Iout1) output from the first container detection coil (41a) into a digital signal.

[0147] As another example, the A / D converter (120) can convert an analog signal of the second output current (Iout2) output from the second container detection coil (41b) into a digital signal.

[0148] FIG. 9 is a diagram for explaining a method of sequentially applying input currents to a container detection coil using a multiplexer or sequentially obtaining output currents using a multiplexer according to one embodiment.

[0149] Referring to FIG. 9, the container detection circuit (100) may further include a multiplexer (130). The multiplexer (130) may be connected between the A / D converter (120) and a plurality of switching units (110a, 110b).

[0150] The multiplexer (130) can sequentially input the input currents input to the plurality of container detection coils (41a, 41b) to each of the plurality of container detection coils (41a, 41b).

[0151] For example, the multiplexer (130) can input a first input current (Iin1) to the first container detection coil (41a) and then input a second input current (Iin2) to the second container detection coil (41b).

[0152] As another example, the multiplexer (130) can input a second input current (Iin2) to the second container detection coil (41b) and then input a first input current (Iin1) to the first container detection coil (41a).

[0153] The control unit (200) can control the multiplexer (130) so that the input currents input to the plurality of container detection coils (41a, 41b) are sequentially input to each of the plurality of container detection coils (41a, 41b).

[0154] The multiplexer (130) can sequentially output output currents output from multiple container detection coils (41a, 41b) to the A / D converter (120).

[0155] For example, the multiplexer (130) can output the first input current (Iout1) output from the first container detection coil (41a) to the A / D converter (120) and then output the second output current (Iout2) output from the second container detection coil (41b) to the A / D converter (120).

[0156] As another example, the multiplexer (130) can output the second output current (Iout2) output from the second container detection coil (41a) to the A / D converter (120) and then output the first output current (Iout1) output from the first container detection coil (41a) to the A / D converter (120).

[0157] The control unit (200) can control the multiplexer (130) so that the output currents output from the plurality of container detection coils (41a, 41b) are sequentially output to the A / D converter (120).

[0158] According to the present disclosure, the electrical connection between the A / D converter (120) and the plurality of container detection coils (41a, 41b) can be blocked or allowed to flow through a switching unit, thereby preventing the magnetic field (B) generated by the heating coil (42) or the induced electromotive force generated by the electromagnetic induction phenomenon from being induced into the container detection circuit (100).

[0159] According to the present disclosure, the input currents (Iin1, Iin2) input to the plurality of container detection coils (41a, 41b) are sequentially input to each of the plurality of container detection coils (41a, 41b), and the output currents (Iout1, Iout2) output from the plurality of container detection coils (41a, 41b) are sequentially output to the A / D converter (120), thereby providing a better effect of simplifying the structure of the container detection circuit (100) even if the number of container detection coils (41) is increased.

[0160] FIG. 10 illustrates a circuit diagram of a container detection circuit according to one embodiment.

[0161] In FIGS. 10 to 13, the switching unit (110) is described as one of a plurality of switching units (e.g., 110a, 110b), and the container detection coil (41) is described as one of a plurality of container detection coils (41a, 41b).

[0162] Referring to FIG. 10, the switching unit (110) may include at least one switch that allows or blocks the flow of input current (Iin) input to the container detection coil (41) or the flow of output current (Iout) output from the container detection coil (41).

[0163] At least one switch may include a first switch (S1) and a second switch (S2).

[0164] Each of the first switch (S1) and the second switch (S2) may be a Field Effect Transistor (FET). However, this is not a limitation, and they may be implemented as a Bipolar Junction Transistor (BJT) instead of a FET. This may be changed according to the designer's intention, and the contents of the present invention may also be implemented as a BJT.

[0165] The container detection coil (41) may be composed of an inductor (L), a capacitor (C), and a resistor (R).

[0166] When the first switch (S1) and the second switch (S2) are turned on, the input current (Iin) is input to the container detection coil (41), and the output current (Iout) output from the container detection coil (41) is output to the A / D converter (120) through the multiplexer (130), and the A / D converter (120) can convert the signal of the output current (Iout) into a digital signal. Accordingly, the control unit (200) can detect the cooking container (CV) on the cooking plate (20) using the digital signal.

[0167] When at least one of the first switch (S1) and the second switch (S2) is turned off, the flow of the input current (Iin) input to the container detection coil (41) is blocked, and the flow of the output current (Iout) output from the container detection coil (41) can also be blocked.

[0168] In one embodiment, the control unit (200) may cause at least one switch to remain on while not driving the heating coil (42).

[0169] For example, the control unit (200) can keep the first switch (S1) and the second switch (S2) in an on state while not applying the first driving current (I1, FIG. 7) to the heating coil (42) via the power supply unit (300). Accordingly, while the heating coil (42) is not driven, the first switch (S1) and the second switch (S2) are kept in an on state, so that the control unit (200) can detect the cooking vessel (CV) on the cooking plate (20).

[0170] In one embodiment, the control unit (200) can turn on at least one switch for a predetermined period of time at predetermined intervals while driving the heating coil (42).

[0171] For example, the control unit (200) can turn on the first switch (S1) and the second switch (S2) for a predetermined period of time at predetermined intervals while applying the first driving current (I1, FIG. 7) to the heating coil (42) through the power supply unit (300).

[0172] It is necessary to detect the cooking vessel (CV) on the cooking plate (20) even while driving the heating coil (42). For example, if the position of the cooking vessel (CV) on the cooking plate (20) changes or the type of the cooking vessel (CV) changes while driving the heating coil (42) to perform cooking, it is necessary to detect the cooking vessel (CV) on the cooking plate (20).

[0173] However, while driving the heating coil (42), the magnetic field (B) generated from the heating coil (42) or the induced electromotive force generated by the electromagnetic induction phenomenon may be induced in the container detection circuit (100), which may cause a failure of each component (e.g., A / D converter (120), multiplexer (130), container detection coil (41)) of the container detection circuit (100). Therefore, the cooking appliance (1) can detect the cooking container (CV) on the cooking plate (20) by turning on the first switch (S1) and the second switch (S2) only for a predetermined time at a predetermined cycle while driving the heating coil (42).

[0174] FIG. 11 is a diagram illustrating a method for determining a predetermined cycle for turning on a switch of a container detection circuit based on a driving frequency applied to a heating coil according to one embodiment.

[0175] Referring to FIG. 11, FIG. 11 illustrates the waveform of the driving power applied to the heating coil (42).

[0176] The driving power applied to the heating coil (42) may have an AC power waveform.

[0177] The driving power applied to the heating coil (42) is an AC power that changes over time, and thus can have a value of 0 as time passes. The time during which the driving power applied to the heating coil (42) has a value of 0 can be referred to as the zero crossing time (ZC).

[0178] At the zero crossing time (ZC), the value of the driving power applied to the heating coil (42) is 0, so the strength of the magnetic field (B) generated from the heating coil (42) or the induced electromotive force due to the electromagnetic induction phenomenon may be lower than at other times.

[0179] In one embodiment, the control unit (200) can determine a predetermined cycle based on the driving frequency of the heating coil (42).

[0180] For example, the control unit (200) can determine the zero crossing time (ZC) of the driving power applied to the heating coil (42) at a predetermined cycle.

[0181] Specifically, when the driving frequency of the driving power applied to the heating coil (42) is high, the interval between zero crossing times (ZC) of the driving power is reduced, and when the driving frequency of the driving power applied to the heating coil (42) is low, the interval between zero crossing times (ZC) of the driving power is widened, so the control unit (200) can determine a predetermined cycle in inverse proportion to the driving frequency of the driving power applied to the heating coil (42).

[0182] In one embodiment, the control unit (200) can turn on at least one switch (e.g., S1 and S2) for a predetermined time (tz) at predetermined intervals based on the driving frequency of the heating coil (42).

[0183] FIG. 12 illustrates a circuit diagram of a container detection circuit further including a Zener diode in the container detection circuit of FIG. 10.

[0184] The switching unit (110) may further include a Zener diode circuit connecting a first node (N1) through which an input current (Iin) flows and a second node (N2) through which an output current (Iout) flows.

[0185] The Zener diode circuit may include a first Zener diode (ZD1) having a cathode connected to a first node (N1) and an anode connected to a ground node (Ng) and / or a second Zener diode (ZD2) having a cathode connected to a second node (N2) and an anode connected to the ground node (Ng).

[0186] The Zener diode circuit can be configured so that even if the magnetic field (B) generated by the heating coil (42) being driven and the induced electromotive force generated by the electromagnetic induction phenomenon are induced to the container detection coil (41), a voltage value greater than a predetermined voltage value is not applied to the A / D converter (120) and the multiplexer (130).

[0187] For example, the first Zener diode (ZD1) may be configured such that the cathode is connected to the first node (N1) and the anode is connected to the ground node (Ng), so that even if a voltage value greater than a predetermined voltage value is applied to the first node (N1), current flows to the ground node (Ng) through the first Zener diode (ZD1) so that a voltage greater than the predetermined voltage value is not applied to the A / D converter (120) and the multiplexer (130).

[0188] As another example, the second Zener diode (ZD2) may be configured such that the cathode is connected to the second node (N2) and the anode is connected to the ground node (Ng), so that even if a voltage value greater than a predetermined voltage value is applied to the second node (N2), current flows to the ground node (Ng) through the second Zener diode (ZD2) so that a voltage greater than the predetermined voltage value is not applied to the A / D converter (120) and the multiplexer (130).

[0189] Fig. 13 is a flowchart for explaining a method for controlling a cooking appliance according to one embodiment.

[0190] Referring to FIG. 13, in one embodiment, the control unit (200) may turn on at least one switch (e.g., S1, S2) for a predetermined period of time at predetermined intervals based on receiving a heating execution command for heating a cooking vessel (CV) on a cooking plate (20).

[0191] For example, the control unit (200) may drive the heating coil (42) (1200) based on receiving a heating execution command through the user interface device (51) after the power of the cooking appliance (1) is turned on, and may turn on at least one switch (e.g., S1, S2) for a predetermined period of time at predetermined intervals (1300).

[0192] In one embodiment, the control unit (200) may cause at least one switch (e.g., S1, S2) to remain on until a heating execution command is received after the cooking appliance (1) is turned on. For example, the control unit (200) may cause the first switch (S1) and the second switch (S2) to remain on when the heating execution command is not received after the cooking appliance (1) is turned on (No of 1100).

[0193] FIG. 14 is a drawing illustrating a portion of a coil assembly according to one embodiment.

[0194] Referring to FIG. 14, the coil assembly (40) is disposed under the cooking plate (20) and may include a first layer (410), an insulating layer (420) disposed under the first layer (410), a second layer (430) disposed under the insulating layer (420), and / or a coil cover (43a, 43b) disposed on the first layer (410).

[0195] The coil cover (43a, 43b) may include a first coil cover (43a) and a second coil cover (43b).

[0196] The container detection coils (41a, 41b) may be arranged in the first layer (410). The container detection coils (41a, 41b) may include a first container detection coil (41a) and a second container detection coil (41b).

[0197] The heating coils (42a, 42b) may be placed in the second layer (430). The heating coils (42a, 42b) may include a first heating coil (42a) and a second heating coil (42b).

[0198] Referring to FIG. 3 and FIG. 14, the first coil assembly (40a) includes a first coil cover (43a) disposed under the first cooking area (CA1), a first layer (410), an insulating layer (420), and a second layer (430) in an area corresponding to the first cooking area (CA1), and a first container detection coil (41a) may be disposed in the first layer (410) in an area corresponding to the first cooking area (CA1) and in the second layer (430) in an area corresponding to the first cooking area (CA1).

[0199] The second coil assembly (40b) includes a second coil cover (43b) disposed under the second cooking area (CA2), a first layer (410), an insulating layer (420), and a second layer (430) in a corresponding area under the second cooking area (CA2), and a second container detection coil (41b) may be disposed in the first layer (410) in the corresponding area under the second cooking area (CA2) and in the second layer (430) in the corresponding area under the second cooking area (CA2).

[0200] The heating coils (42a, 42b) and the container detection coils (41a, 41b) may be arranged perpendicular to each other (Z direction). For example, the first layer (410) and the second layer (430) may be stacked along the vertical direction (Z direction). The container detection coils (41a, 41b) may be arranged in the first layer (410), and the heating coils (42a, 42b) may be arranged in the second layer (430), so that the container detection coils (41a, 41b) and the heating coils (42a, 42b) may be arranged perpendicular to each other (Z direction).

[0201] Conventionally, the container detection coils (41a, 41b) were arranged horizontally (Y direction) with the heating coils (42a, 42b). For example, the heating coils (42a, 42b) and the container detection coils (41a, 41b) were arranged on the same layer. Specifically, the container detection coils (41a, 41b) were arranged in the central portion of the heating coils (42a, 42b).

[0202] When the container detection coils (41a, 41b) are placed on the same layer as the heating coils (42a, 42b), the area in which the container detection coils (41a, 41b) can be placed may be limited by the area occupied by the heating coils (42a, 42b).

[0203] According to the present disclosure, the container detection coils (41a, 41b) are disposed on different layers (e.g., the first layer (410) and the second layer (430)) from the heating coils (42a, 42b), so that the area in which the container detection coils (41a, 41b) can be disposed is wider than when they are disposed on the same layer, thereby expanding the area in which the container detection coils (41a, 41b) can be disposed, and thus the area in which the cooking vessel (CV) can be detected on the cooking plate (20) is expanded, thereby providing a better effect of detecting the cooking vessel (CV) in any area of ​​the cooking plate (20). The heating coils (42a, 42b) may be formed in a square shape.

[0204] In the past, heating coils (42a, 42b) were formed in a circular shape. When heating coils (42a, 42b) are formed in a circular shape, the area capable of heating a cooking vessel (CV) on the cooking plate (20) may be smaller than when heating coils (42a, 42b) are formed in a square shape.

[0205] According to the present disclosure, the heating coils (42a, 42b) are formed in a square shape, so that the area where the cooking vessel (CV) on the cooking plate (20) can be heated is relatively wider, so that the cooking vessel (CV) can be heated even if it is not placed in the area corresponding to the center of the cooking area (CA) of the cooking plate (20), and thus there is a better effect of heating the cooking vessel (CV) without being limited by the size or number of the cooking vessel (CV).

[0206] In addition, according to the present disclosure, the container detection coils (41a, 41b) are disposed in a different layer (e.g., a first layer (410) and a second layer (430)) from the heating coils (42a, 42b), and an insulating layer (420) is formed between the container detection coils (41a, 41b) and the heating coils (42a, 42b), so that there is a better effect of minimizing the induced electromotive force generated by the electromagnetic induction phenomenon induced in the container detection coils (41a, 41b).

[0207] However, the structure of the coil assembly according to the present disclosure is not limited to that illustrated in FIG. 14, and the container detection coil and the heating coil may be arranged in the same layer according to various embodiments.

[0208] A cooking appliance according to one embodiment of the present disclosure may include: a cooking plate; a heating coil disposed under the cooking plate; a container detection circuit, wherein the container detection circuit includes a container detection coil corresponding to the heating coil, and at least one switch for allowing or blocking a flow of input current input to the container detection coil or a flow of output current output from the container detection coil; and a control unit for turning on at least one switch for a predetermined period of time at predetermined intervals while driving the heating coil.

[0209] The container detection circuit may further include an A / D converter that converts the signal of the output current into a digital signal.

[0210] The container detection coil may include a plurality of container detection coils, and the container detection circuit may further include a multiplexer that sequentially inputs input currents input to the plurality of container detection coils to each of the plurality of container detection coils.

[0211] The multiplexer may include a first container detection coil and a second container detection coil, and the multiplexer may sequentially input a first input current inputted to the first container detection coil into the first container detection coil and then input a second input current inputted to the second container detection coil into the second container detection coil.

[0212] The container detection coil may include a plurality of container detection coils, and the container detection circuit may further include a multiplexer that sequentially outputs output currents output from the plurality of container detection coils to an A / D converter.

[0213] The plurality of container detection coils include a first container detection coil and a second container detection coil, and the multiplexer can sequentially output a second output current output from the second container detection coil to the A / D converter after outputting a first output current output from the first container detection coil to the A / D converter.

[0214] The container detection circuit further includes a zener diode circuit connecting a first node through which an input current flows and a second node through which an output current flows; the zener diode circuit may include a first zener diode having a cathode connected to the first node and an anode connected to a ground node; and a second zener diode having a cathode connected to the second node and an anode connected to the ground node.

[0215] The control unit can determine a predetermined cycle based on the driving frequency of the heating coil.

[0216] The control unit can turn on at least one switch for a predetermined period of time at predetermined intervals based on receiving a heating execution command for heating a cooking vessel on the cooking plate.

[0217] The cooking plate may further include a coil assembly comprising a first layer, an insulating layer disposed under the first layer, and a second layer disposed under the insulating layer, wherein the container sensing coil may be disposed in the first layer, and the heating coil may be disposed in the second layer.

[0218] A control method of a cooking appliance according to the present disclosure includes a cooking plate, a heating coil disposed under the cooking plate, and a container detection circuit, wherein the cooking appliance includes a container detection coil corresponding to the heating coil, and a container detection circuit including at least one switch for allowing or blocking the flow of input current input to the container detection coil or the flow of output current output from the container detection coil, wherein the control method may include turning on at least one switch for a predetermined period of time at predetermined intervals while driving the heating coil.

[0219] The container detection circuit may further include an A / D converter that converts the signal of the output current into a digital signal.

[0220] The container detection coil may include a plurality of container detection coils, and the container detection circuit may further include a multiplexer that sequentially inputs input currents input to the plurality of container detection coils to each of the plurality of container detection coils.

[0221] The plurality of container detection coils include a first container detection coil and a second container detection coil, and the multiplexer can sequentially input a second input current input to the second container detection coil into the second container detection coil after inputting a first input current input to the first container detection coil into the first container detection coil.

[0222] The container detection coil may include a plurality of container detection coils, and the container detection circuit may further include a multiplexer that sequentially outputs output currents output from the plurality of container detection coils to an A / D converter.

[0223] The plurality of container detection coils include a first container detection coil and a second container detection coil, and the multiplexer can sequentially output a second output current output from the second container detection coil to the A / D converter after outputting a first output current output from the first container detection coil to the A / D converter.

[0224] The container detection circuit further includes a zener diode circuit connecting a first node through which an input current flows and a second node through which an output current flows; the zener diode circuit may include a first zener diode having a cathode connected to the first node and an anode connected to a ground node; and a second zener diode having a cathode connected to the second node and an anode connected to the ground node.

[0225] It may further include determining a predetermined cycle based on the driving frequency of the heating coil.

[0226] Turning on at least one switch for a predetermined period of time at predetermined intervals may include turning on at least one switch for a predetermined period of time at predetermined intervals based on receiving a heating execution command for heating a cooking vessel on a cooking plate.

[0227] The cooking appliance further includes a coil assembly disposed below the cooking plate, the coil assembly including a first layer, an insulating layer disposed below the first layer, and a second layer disposed below the insulating layer, wherein the container sensing coil may be disposed in the first layer, and the heating coil may be disposed in the second layer.

[0228] Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium storing computer-executable instructions. The instructions may be stored in the form of program code, and when executed by a processor, may generate program modules to perform the operations of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

[0229] Computer-readable storage media include all types of storage media that store instructions that can be deciphered by a computer. Examples include read-only memory (ROM), random access memory (RAM), magnetic tape, magnetic disks, flash memory, and optical data storage devices.

[0230] Additionally, a computer-readable recording medium may be provided in the form of a non-transitory storage medium. Here, the term "non-transitory storage medium" simply means a tangible device that does not contain signals (e.g., electromagnetic waves). This term does not distinguish between cases where data is permanently stored in the storage medium and cases where data is temporarily stored. For example, a "non-transitory storage medium" may include a buffer in which data is temporarily stored.

[0231] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable recording medium (e.g., compact disc read only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product (e.g., a downloadable app) may be temporarily stored or temporarily generated on a machine-readable recording medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0232] The disclosed embodiments have been described with reference to the attached drawings as described above. Those skilled in the art will understand that the present invention can be implemented in forms other than the disclosed embodiments without altering the technical spirit or essential features of the present invention. The disclosed embodiments are illustrative and should not be construed as limiting.

Claims

1. Cooking board; A container detection circuit comprising a container detection coil and at least one switch allowing a flow of input current input to the container detection coil and a flow of output current output from the container detection coil, wherein the container detection circuit determines a position or type of a cooking container on the cooking plate while the at least one switch is controlled to allow a flow of the input current and a flow of the output current; A heating coil disposed under the cooking plate, wherein the heating coil generates a magnetic field that can be extended to the cooking plate and the container detection circuit based on the supply of driving power; and A cooking appliance including a control unit that controls at least one switch to allow the flow of the input current and the output current for a predetermined period of time corresponding to the driving frequency of the driving power while the driving power is supplied to the heating coil.

2. In paragraph 1, The above container detection circuit, A cooking appliance further comprising an A / D converter for converting the value of the above output current into a digital signal.

3. In paragraph 1, The above container detection coil comprises a plurality of container detection coils, The above container detection circuit, A cooking appliance further comprising a multiplexer that sequentially inputs input currents corresponding to each of the plurality of container detection coils to each of the plurality of container detection coils.

4. In paragraph 3, The above plurality of container detection coils include a first container detection coil and a second container detection coil, The above multiplexer, A cooking appliance that sequentially inputs a first input current corresponding to the first container detection coil into the first container detection coil and then sequentially inputs a second input current corresponding to the second container detection coil into the second container detection coil.

5. In paragraph 2, The above container detection coil comprises a plurality of container detection coils, The above container detection circuit, A cooking appliance further comprising a multiplexer that sequentially outputs output currents corresponding to each of the plurality of container detection coils to the A / D converter.

6. In paragraph 5, The above plurality of container detection coils include a first container detection coil and a second container detection coil, The above multiplexer, A cooking appliance that sequentially outputs a second output current corresponding to the second container detection coil to the A / D converter after outputting a first output current corresponding to the first container detection coil to the A / D converter.

7. In paragraph 1, The above container detection circuit, Further comprising a zener diode circuit connecting a first node through which the input current flows and a second node through which the output current flows; The above zener diode circuit, A first zener diode having a first cathode connected to the first node and a first anode connected to the ground node; and A cooking appliance comprising a second zener diode having a second cathode connected to the second node and a second anode connected to the ground node.

8. In paragraph 1, The above control unit, A cooking appliance that determines the predetermined cycle based on the above driving frequency.

9. In paragraph 1, The above control unit, A cooking appliance that controls at least one switch based on receiving a heating execution command for heating a cooking container on the cooking plate.

10. In paragraph 1, Further comprising a coil assembly disposed under the cooking plate, the coil assembly including a first layer, an insulating layer disposed under the first layer, and a second layer disposed under the insulating layer; A cooking appliance wherein the container detection coil is disposed in the first layer and the heating coil is disposed in the second layer.

11. A cooking appliance control method comprising: a cooking plate, a container detection circuit including a container detection coil, and at least one switch allowing a flow of input current input to the container detection coil and a flow of output current output from the container detection coil, wherein the container detection circuit determines a position or type of a cooking container on the cooking plate while the at least one switch is controlled to allow a flow of the input current and a flow of the output current; and a heating coil disposed under the cooking plate, wherein the heating coil generates a magnetic field that can be extended to the cooking plate and the container detection circuit based on the supply of driving power. Supplying the driving power to the heating coil; and A control method for a cooking appliance, comprising: controlling at least one switch to allow the flow of the input current and the output current for a predetermined period of time corresponding to the driving frequency of the driving power while the driving power is supplied to the heating coil; 12. In paragraph 11, The above container detection circuit, Including an A / D converter, The control method of the above cooking appliance is: A control method for a cooking appliance, further comprising: converting the value of the output current into a digital signal using the A / D converter.

13. In paragraph 11, The above container detection coil comprises a plurality of container detection coils, The above container detection circuit, Including a multiplexer; The control method of the above cooking appliance is: A control method for a cooking appliance further comprising: controlling the multiplexer to sequentially input input currents corresponding to each of the plurality of container detection coils to each of the plurality of container detection coils.

14. In paragraph 13, The above plurality of container detection coils include a first container detection coil and a second container detection coil, A control method for the cooking appliance further comprises: controlling the multiplexer to sequentially input a first input current corresponding to the first container detection coil into the first container detection coil and then a second input current corresponding to the second container detection coil into the second container detection coil.

15. In paragraph 12, The above container detection coil comprises a plurality of container detection coils, The above container detection circuit, Including a multiplexer; The control method of the above cooking appliance is: A control method for a cooking appliance, further comprising: controlling the multiplexer to sequentially output output currents corresponding to each of the plurality of container detection coils to the A / D converter.

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