Induction heating apparatus and control method therefor

Abstract

An induction heating apparatus and a control method therefor can be provided. Specifically, an induction heating apparatus can be provided, the apparatus comprising: a plurality of sensing coils; a plurality of logic elements; a plurality of light-emitting elements; and a processor, wherein at least one of the sensing coils detects, independently of the processor, a cooking container placed in a cooking area and heated on the basis of a cooking operation, generates a plurality of detection signals on the basis of the result of detecting the cooking container independently of the processor, and provides, independently of the processor, a plurality of output signals based on the detection signals to the logic elements, and the logic elements operate at least some of the light-emitting elements on the basis of the output signals.

Description

Induction heating device and its control method

[0001] The present disclosure relates to an induction heating device and a control method thereof.

[0002] An induction heater is a cooking appliance that utilizes the principle of induction heating, commonly referred to as an induction range or induction cooktop. An induction heater can generate heat by applying electric current to a cooking vessel containing a magnetic material. The cooking vessel can also be referred to as a cooking appliance. Induction heaters can be highly energy efficient and stable. Since heat is generated solely within the cooking vessel itself, the contact surface with the vessel itself is not heated, reducing the risk of burns. Compared to gas stoves, induction heaters do not consume oxygen or emit waste gases, reducing indoor air pollution and temperature rise. Consequently, demand for induction heaters has been increasing recently.

[0003] Meanwhile, a technology for variably setting the cooking area of ​​an induction heating device is being developed. An induction heating device with a variable cooking area can detect the position of a cooking vessel placed on the cooking surface. The induction heating device with a variable cooking area can set the cooking area corresponding to the position of the cooking vessel. The induction heating device with a variable cooking area can heat the cooking vessel in the area desired by the user of the induction heating device by transmitting power through the set cooking area. The induction heating device with a variable cooking area can increase the heating efficiency of the cooking vessel regardless of the area in which the cooking vessel is placed by transmitting power through the set cooking area.

[0004] An induction heating device according to one embodiment of the present disclosure may include a plurality of sensing coils disposed below a cooking region of the induction heating device, a plurality of logic elements electrically connected to the plurality of sensing coils, a plurality of light-emitting elements electrically connected to each of the plurality of logic elements, and a processor for controlling a cooking operation of the induction heating device as a whole. At least one sensing coil among the plurality of sensing coils according to one embodiment of the present disclosure may be disposed in the cooking region and may independently detect a cooking vessel to be heated based on a cooking operation, independently of the processor. At least one sensing coil according to one embodiment of the present disclosure may independently generate a plurality of sensing signals based on a result of sensing the cooking vessel, independently of the processor. At least one sensing coil according to one embodiment of the present disclosure may independently provide a plurality of output signals based on the plurality of sensing signals to a plurality of logic elements. The plurality of logic elements according to one embodiment of the present disclosure may operate at least some of the plurality of light-emitting elements based on the plurality of output signals.

[0005] A method for controlling an induction heating device according to an embodiment of the present disclosure may include an operation in which at least one of a plurality of sensing coils of the induction heating device detects a cooking vessel to be heated based on a cooking operation, independently of a processor that controls the cooking operation of the induction heating device as a whole. A method for controlling an induction heating device according to an embodiment of the present disclosure may include an operation in which the at least one sensing coil independently of the processor generates a plurality of sensing signals based on a result of sensing the cooking vessel. A method for controlling an induction heating device according to an embodiment of the present disclosure may include an operation in which the at least one sensing coil independently of the processor provides a plurality of output signals based on the plurality of sensing signals to a plurality of logic elements of the induction heating device. A method for controlling an induction heating device according to an embodiment of the present disclosure may include an operation in which the plurality of logic elements operate at least some of the plurality of light-emitting elements of the induction heating device based on the plurality of output signals.

[0006] FIG. 1 is a drawing showing an induction heating device according to one embodiment of the present disclosure.

[0007] FIG. 2 is a block diagram showing an induction heating device according to one embodiment of the present disclosure.

[0008] FIG. 3A is a block diagram showing a sensing coil group and a sensing circuit of an induction heating device according to one embodiment of the present disclosure.

[0009] FIG. 3b is a block diagram showing a sensing coil group and a sensing circuit of an induction heating device according to one embodiment of the present disclosure.

[0010] FIG. 4a is a drawing showing a unit circuit board in an induction heating device according to one embodiment of the present disclosure.

[0011] FIG. 4b is a drawing showing a unit circuit board in an induction heating device according to one embodiment of the present disclosure.

[0012] FIG. 5a is a drawing showing a unit circuit board in an induction heating device according to one embodiment of the present disclosure.

[0013] FIG. 5b is a drawing showing a unit circuit board in an induction heating device according to one embodiment of the present disclosure.

[0014] FIG. 6 is a drawing showing a unit circuit board in an induction heating device according to one embodiment of the present disclosure.

[0015] FIG. 7 is a diagram showing a first logic element of an induction heating device according to one embodiment of the present disclosure.

[0016] FIG. 8 is a diagram showing the configuration of a first sensing coil group and a second sensing coil group of an induction heating device according to one embodiment of the present disclosure, and the operation of a signal collection circuit and a first logic element.

[0017] Fig. 9 is a flowchart illustrating a control method of an induction heating device according to one embodiment of the present disclosure.

[0018] FIG. 10 is a drawing showing an induction heating device according to one embodiment of the present disclosure indicating the edge of a cooking vessel.

[0019] FIG. 11 is a drawing showing an induction heating device according to one embodiment of the present disclosure indicating the edge of a cooking vessel.

[0020] FIG. 12 is a drawing showing an induction heating device according to one embodiment of the present disclosure, showing the edges of each of a plurality of cooking vessels.

[0021] FIG. 13 is a drawing showing a first light-emitting element of an induction heating device according to one embodiment of the present disclosure.

[0022] FIG. 14 is a drawing showing a cooking vessel placed on an induction heating device according to one embodiment of the present disclosure.

[0023] The terms used in this disclosure will be briefly explained, and one embodiment of the present disclosure will be specifically described.

[0024] The terms used in this disclosure are selected from widely used, current terms, taking into account the functions of one embodiment of the disclosure. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the description of the relevant embodiments of the disclosure. Therefore, the terms used in this disclosure should not be defined simply as names of terms, but rather based on the meanings of the terms and the overall content of the disclosure.

[0025] Throughout this disclosure, when a part is said to "include" a component, this does not exclude other components, but rather implies the inclusion of other components, unless otherwise specifically stated. Furthermore, terms such as "part," "module," and the like described herein refer to a unit that processes at least one function or operation, which may be implemented in hardware or software, or a combination of hardware and software.

[0026] Below, with reference to the attached drawings, embodiments of the present disclosure are described in detail so that those skilled in the art can easily implement the present disclosure. However, one embodiment of the present disclosure may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in the drawings, parts irrelevant to the description are omitted to clearly describe one embodiment of the present disclosure, and similar parts are designated with similar drawing reference numerals throughout the present disclosure.

[0027] According to one embodiment of the present disclosure, a plurality of light-emitting elements can be operated to emit light along the edge of a cooking vessel placed in an induction heating device independently of a processor of the induction heating device, thereby omitting a wiring structure for connecting the processor and each of the plurality of light-emitting elements. The cooking vessel may also be referred to as a cooking appliance. Accordingly, the number of pins used in the processor of the induction heating device can be reduced, thereby reducing the load on the processor, and the arrangement structure of signal lines arranged on a printed circuit board (PCB) of the induction heating device to transmit signals can be simplified.

[0028] FIG. 1 is a drawing illustrating an induction heating device (1000) according to one embodiment of the present disclosure. The induction heating device (1000) may be a cooking heating device that induces heat generation by transmitting power to a cooking vessel (2000) containing a magnetic body using the principle of electromagnetic induction. The cooking vessel (2000) may also be referred to as a cooking appliance (2000). For example, the induction heating device (1000) may be an induction range, a cooktop, an electric range, or an induction.

[0029] In one embodiment, the top plate (1010) of the induction heating device (1000) may include tempered glass such as ceramic glass. A cooking vessel (2000) may be positioned in any area of ​​the top plate (1010) of the induction heating device (1000). The induction heating device (1000) according to one embodiment of the present disclosure may be capable of setting any area of ​​the top plate (1010) as a cooking zone. The induction heating device (1000) may heat the cooking vessel (2000) placed in any area of ​​the top plate (1010). The top plate (1010) of the induction heating device (1000) may be entirely provided with heating coils for inductively heating the cooking vessel (2000) using the principle of electromagnetic induction. Throughout the present disclosure, the heating coils may also be collectively referred to as working coils or transmitting coils. The heating coil can be patterned on a printed circuit board (PCB).

[0030] In one embodiment, the heating coil of the top plate (1010) of the induction heating device (1000) can transmit power to the cooking vessel (2000) by using a magnetic field induced in the receiving coil or the IH (Induction Heating) metal through self-induction. For example, the IH metal can be a metal or alloy containing iron. For example, the induction heating device (1000) can generate an eddy current in the cooking vessel (2000) or induce a magnetic field in the receiving coil of the cooking vessel (2000) by flowing a current through the heating coil to form a magnetic field.

[0031] In one embodiment, the induction heating device (1000) can detect that a cooking vessel (2000) including a magnetic material (e.g., an IH vessel, an IH cooking appliance) is positioned on the top plate (1010). For example, the induction heating device (1000) can detect that the cooking vessel (2000) is placed on the top plate (1010) of the induction heating device (1000) based on a change in the current value of the heating coil or a change in inductance due to the approach of the cooking vessel (2000).

[0032] In one embodiment, a sensing unit may be placed on the lower portion of the top plate (1010) of the induction heating device (1000). The induction heating device (1000) may detect a cooking vessel (2000) positioned on the top plate (1010) through the sensing unit. For example, the induction heating device (1000) may detect that a cooking vessel (2000) is placed using the sensing unit. For example, the induction heating device (1000) may detect the position of the cooking vessel (2000) using the sensing unit. However, the present invention is not limited thereto, and the heating coil of the induction heating device (1000) may be replaced with the sensing unit of the induction heating device (1000).

[0033] In one embodiment, the induction heating device (1000) can receive user input setting an action to be performed via the input / output interface (1020). For example, the induction heating device (1000) can receive a heating input to heat food within a cooking vessel (2000) via the input / output interface (1020). For example, the induction heating device (1000) can receive a heating input to heat food within a cooking vessel (2000) at “level 5” for 10 minutes via the input / output interface (1020). The induction heating device (1000) can heat food within the cooking vessel (2000) by inductively heating the cooking vessel (2000) in response to the heating input.

[0034] In one embodiment, a light emitting area (1030) may be formed on the upper plate (1010) of the induction heating device (1000). For example, a plurality of light emitting elements may be arranged on the lower portion of the upper plate (1010) of the induction heating device (1000) to form the light emitting area (1030). For example, the plurality of light emitting elements may be light emitting diodes (LEDs).

[0035] In one embodiment, the induction heating device (1000) can indicate the position of the cooking vessel (2000) using a light-emitting area (1030). The light-emitting area (1030) according to one embodiment of the present disclosure can visually indicate the position where the cooking vessel (2000) is placed.

[0036] In one embodiment, the light-emitting area (1030) may be formed to surround the periphery of the cooking vessel (2000). For example, the light-emitting area (1030) may be formed in a circular shape surrounding the periphery of the lower surface of the cooking vessel (2000). However, the present invention is not limited thereto, and the light-emitting area (1030) may also be formed in a rectangular or polygonal shape surrounding the periphery of the lower surface of the cooking vessel (2000).

[0037] In one embodiment, the cooking vessel (2000) may be a device for heating or cooking food. The food may be a liquid such as water, soup, tea, coffee, oil, alcohol, fruit juice, etc., or a solid such as meat, vegetables, rice, bread, butter, etc., but is not limited thereto. The cooking vessel (2000) may be powered wirelessly from the induction heating device (1000) using the principle of electromagnetic induction. The cooking vessel (2000) may be an IH vessel or an IH cooking device that includes a magnetic material. For example, the cooking vessel (2000) may be a pot that includes an IH metal as illustrated in FIG. 1. However, the invention is not limited thereto, and the cooking device (2000) may also be a small appliance that includes a communication interface. For example, the cooking device (2000) may be a cordless small appliance such as a smart kettle. The cooking container (2000) will be described in more detail with reference to Fig. 14.

[0038] Hereinafter, the components constituting the induction heating device (1000) will be described with reference to FIG. 2.

[0039] FIG. 2 is a block diagram illustrating an induction heating device (1000) according to one embodiment of the present disclosure. The induction heating device (1000) according to one embodiment of the present disclosure may include a magnetic field generation circuit (1100), a detection unit (1200), a communication circuit (1300), a user interface (1400), a memory (1500), and a processor (1600).

[0040] In one embodiment, a magnetic field generating circuit (1100) can transmit power to a cooking vessel (2000) placed on an induction heating device (1000) to induce heat generation in the cooking vessel (2000). The magnetic field generating circuit (1100) can include a driving circuit (1110) and a heating coil (1120).

[0041] In one embodiment, the drive circuit (1110) may be powered from an external source. The drive circuit (1110) may supply current to the heating coil (1120) according to a drive control signal of the processor (1600). The drive circuit (1110) may include an EMI (Electro Magnetic Interference) filter, a rectifier circuit, an inverter circuit, a distribution circuit, a current sensing circuit, and a drive processor.

[0042] In one embodiment, an EMI filter can block high-frequency noise included in AC power supplied from an external power source. The EMI filter can pass AC voltage and AC current within a predetermined frequency band. For example, the EMI filter can pass AC voltage and AC current of 50 Hz or more and 60 Hz or less. The EMI filter can block frequency components outside the predetermined frequency band. A fuse and a relay to block overcurrent can be provided between the EMI filter and the external power source. The EMI filter can transmit AC power, from which high-frequency noise has been blocked, to a rectifier circuit.

[0043] In one embodiment, a rectifier circuit can convert alternating current (AC) power into direct current (DC) power. For example, the rectifier circuit can convert an AC voltage whose magnitude and polarity vary over time into a DC voltage whose magnitude and polarity are constant. For example, the rectifier circuit can convert an AC current whose magnitude and direction vary over time into a DC current whose magnitude and direction are constant. The rectifier circuit can include a bridge circuit. For example, the rectifier circuit can include a diode bridge rectifier consisting of four diodes. The diode bridge rectifier can convert an AC voltage whose polarity varies over time into a positive voltage whose polarity is constant, and can convert an AC current whose direction varies over time into a positive current whose direction is constant. The rectifier circuit can include a DC link capacitor. The DC link capacitor can convert a positive voltage whose magnitude varies over time into a DC voltage of constant magnitude.

[0044] In one embodiment, the inverter circuit may include a switching circuit that supplies or cuts off a driving current to the heating coil (1120). The switching circuit may include a first switch and a second switch. The first switch and the second switch may be connected in series between a positive line and a negative line output from a rectifier circuit. The first switch and the second switch may be turned on or off according to a driving control signal of a driving processor. The inverter circuit may include a resonant circuit that resonates with the heating coil (1120). The inverter circuit may control a current supplied to the heating coil (1120). For example, the inverter circuit may change the magnitude and direction of a current flowing to the heating coil (1120) based on the turning on and off of the first switch and the second switch. In this case, an alternating current may be supplied to the heating coil (1120). A sine wave type alternating current may be supplied to the heating coil (1120) according to the switching operation of the first switch and the second switch of the inverter circuit. The longer the switching cycle of the first switch and the second switch of the inverter circuit, the greater the current supplied to the heating coil (1120). The longer the switching cycle of the first switch and the second switch of the inverter circuit, the greater the strength of the magnetic field output by the heating coil (1120). The longer the switching cycle of the first switch and the second switch of the inverter circuit, the greater the output of the induction heating device (1000).

[0045] In one embodiment, the distribution circuit may include a plurality of switches that pass or block current supplied to a plurality of heating coils (1120) included in the induction heating device (1000). Each of the plurality of switches included in the distribution circuit may be turned on or off in response to a distribution control signal from the driving processor.

[0046] In one embodiment, the current sensing circuit may include a current sensor that measures the current output from the inverter circuit. The current sensor may transmit an electrical signal corresponding to the measured current value to the drive processor.

[0047] In one embodiment, the drive processor can determine the switching frequency of the switching circuit included in the inverter circuit based on the intensity of the output of the induction heating device (1000). The drive processor can generate a drive control signal for turning on and off the switching circuit according to the determined switching frequency.

[0048] In one embodiment, the heating coil (1120) can wirelessly transmit power to the cooking vessel (2000). The heating coil (1120) can generate a magnetic field for heating the cooking vessel (2000). For example, when a driving current is supplied to the heating coil (1120), a magnetic field can be induced around the heating coil (1120). When an alternating current is supplied to the heating coil (1120), a magnetic field whose magnitude and direction change over time can be induced around the heating coil (1120). The magnetic field induced around the heating coil (1120) can pass through the top plate (1010) including tempered glass. The magnetic field induced around the heating coil (1120) can reach the cooking vessel (2000) placed on the top plate (1010) of the induction heating device (1000). As the magnetic field reaching the cooking vessel (2000) changes in size and direction over time, an eddy current that rotates around the induced magnetic field may be generated in the cooking vessel (2000). Due to the eddy current generated in the cooking vessel (2000), electric resistance heat may be generated in the cooking vessel (2000). Electric resistance heat may be heat generated in a resistor when current flows through the resistor. Electric resistance heat may be referred to as Joule heat. As the cooking vessel (2000) is heated by the electric resistance heat, the contents inside the cooking vessel (2000) may be heated. Meanwhile, when the cooking vessel (2000) is a heater cooking device, a magnetic field around the heating coil (1120) may be induced in the receiving coil of the cooking vessel (2000).

[0049] In one embodiment, the sensing unit (1200) may include a container sensing sensor (1210), a temperature sensor (1220), a sensing coil group (1230), and a sensing circuit (1240).

[0050] In one embodiment, the container detection sensor (1210) may be disposed below the top plate (1010) of the induction heating device (1000). The container detection sensor (1210) may detect that a cooking container (2000) is placed on the top plate (1010) of the induction heating device (1000). The container detection sensor (1210) may detect that the cooking container (2000) is placed by detecting a change in at least one of physical values ​​related to the induction heating device (1000). For example, the container detection sensor (1210) may include at least one of a current sensor, a proximity sensor, a touch sensor, a weight sensor, a temperature sensor, an illuminance sensor, and a magnetic sensor.

[0051] In one embodiment, the temperature sensor (1220) may be installed near the heating coil (1120). For example, the temperature sensor (1220) may be located at the exact center of the heating coil (1120). The temperature sensor (1220) may detect the temperature of a cooking vessel (2000) placed on the top plate (1010) of the induction heating device (1000) or the temperature of the top plate (1010) of the induction heating device (1000). The cooking vessel (2000) may be inductively heated by the heating coil (1120) of the induction heating device (1000). The inductively heated cooking vessel (2000) may be overheated depending on the material of the cooking vessel (2000). Accordingly, the induction heating device (1000) can detect the temperature of the cooking vessel (2000) or the top plate (1010) placed on the top plate (1010) using the temperature sensor (1220), and can block the operation of the heating coil (1120) when the cooking vessel (2000) or the top plate (1010) overheats. The temperature sensor (1220) can include a thermistor whose electrical resistance value changes depending on the temperature. For example, the temperature sensor (1220) can be an NTC (Negative Temperature Coefficient) temperature sensor or a PTC (Positive Temperature Coefficient) temperature sensor.

[0052] In one embodiment, the sensing coil group (1230) may be disposed on the top plate (1010) of the induction heating device (1000). The sensing coil group (1230) may be mounted on a PCB. The sensing coil group (1230) may be disposed on top of the heating coil (1120). For example, the sensing coil group (1230) may be disposed between the heating coil (1120) and tempered glass included in the top plate (1010).

[0053] In one embodiment, the sensing coil group (1230) may include a plurality of sensing coils. When the power of the induction heating device (1000) is turned on, a sensing current may flow through each of the plurality of sensing coils. For example, a sensing current may flow through each of the plurality of sensing coils at a designated cycle while the power of the induction heating device (1000) is turned on. Inductance may be generated at the upper portions of the plurality of sensing coils due to the sensing current flowing through each of the plurality of sensing coils. The inductance generated at the upper portions of the plurality of sensing coils may have an inductance value set during the manufacturing of the induction heating device (1000).

[0054] In one embodiment, when a cooking vessel (2000) is not placed on the induction heating device (1000), the inductance value due to the detection current may be maintained without change. When a vessel unsuitable for use in the induction heating device (1000) is placed, the inductance value due to the detection current may be maintained without change. For example, when a non-metallic vessel is placed on the induction heating device (1000), the inductance value due to the detection current may be maintained at the same inductance value as when the cooking vessel (2000) is not placed.

[0055] In one embodiment, when a cooking vessel (2000) is placed on an induction heating device (1000), an inductance value may change due to a detection current. When a cooking vessel (2000) including a magnetic material such as an IH metal is placed, the inductance value may change due to the magnetic material included in the cooking vessel (2000). The induction heating device (1000) may detect that the cooking vessel (2000) is placed based on a change in the inductance value due to the detection current. For example, when the induction heating device (1000) detects a change in the inductance value due to the detection current, it may detect that the cooking vessel (2000) is placed on the induction heating device (1000). For example, when the amount of change in the inductance value due to the detection current is greater than a specified threshold value, the induction heating device (1000) may detect that the cooking vessel (2000) is placed on the induction heating device (1000).

[0056] In one embodiment, each of the plurality of detection coils can generate a detection signal. Each of the plurality of detection coils can set a level of the detection signal based on a detection result of the cooking vessel (2000) using a change in inductance value due to a detection current. Each of the plurality of detection coils can set the level of the detection signal to a low (L) level when it does not detect that the cooking vessel (2000) is placed. Each of the plurality of detection coils can set the level of the detection signal to a high (H) level when it detects that the cooking vessel (2000) is placed. Each of the plurality of detection coils can transmit a detection signal of the set level to the detection circuit (1240).

[0057] In one embodiment, the detection circuit (1240) can receive a detection signal from each of a plurality of detection coils included in the detection coil group (1230). The detection circuit (1240) can detect an area where the cooking vessel (2000) is placed based on the level of the received detection signal. The detection coil group (1230) can identify the area where the cooking vessel (2000) is placed as a cooking area. In the detection coil group (1230), the light-emitting form of the light-emitting area (1030) can be set so that the cooking area where the cooking vessel (2000) is placed is displayed.

[0058] In one embodiment, the communication circuit (1300) may establish a wireless communication connection with the cooking vessel (2000). The communication circuit (1300) may establish a wireless communication connection with a server. The communication circuit (1300) may include a short-range communication circuit (1310) and a long-range communication circuit (1320).

[0059] In one embodiment, the short-range communication circuit (1310) may support Near Field Communication (NFC) communication, Bluetooth (Bluetooth 802.15.1) communication, Bluetooth Low Energy (BLE) communication, WLAN communication, Zigbee communication, infrared Data Association (IrDA) communication, Wi-Fi Direct (WFD) communication, Ultra Wideband (UWB) communication, or Ant+ communication. The short-range communication circuit (1310) may perform short-range communication with the cooking appliance (2000).

[0060] In one embodiment, the telecommunication circuit (1320) may support a wireless communication network. The network may include a wide area network (WAN) such as the Internet, or a local area network (LAN) formed around an access point (AP). The telecommunication circuit (1320) may perform wireless communication with a server or a mobile terminal. The telecommunication circuit (1320) transmits and receives wireless signals with at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signals may include various types of data according to transmission and reception of voice call signals, video call signals, or text / multimedia messages. The telecommunication circuit (1320) may include, but is not limited to, a 3G module, a 4G module, an LTE module, a 5G module, a 6G module, an NB-IoT module, an LTE-M module, etc.

[0061] In one embodiment, the user interface (1400) may receive user input and provide the user with information regarding the cooking vessel (2000) and information related to the operation of the induction heating device (1000). The user interface (1400) may include an input interface (1410) and an output interface (1420).

[0062] In one embodiment, the input interface (1410) can receive input from a user. For example, the input interface (1410) can include at least one of a key pad, a dome switch, a touch pad, a jog wheel, and a jog switch. For example, the touch pad can receive a user's touch input in at least one of a contact-type electrostatic capacitance method, a pressure-type resistive film method, an infrared sensing method, a surface ultrasonic conduction method, an integral tension measurement method, and a piezoelectric effect method.

[0063] In one embodiment, the input interface (1410) may include a microphone and a voice recognition module. The input interface (1410) may receive a voice signal, which is an analog signal, through the microphone. The input interface (1410) may convert the voice signal into a computer-readable text message using an Automatic Speech Recognition (ASR) model included in the voice recognition module. The input interface (1410) may interpret the converted text message using a Natural Language Understanding (NLU) model. The input interface (1410) may acquire the user's speech intent. The ASR model or the NLU model may be an artificial intelligence model.

[0064] In one embodiment, the output interface (1420) may include a display and a speaker. In one embodiment, the output interface (1420) may output information regarding the cooking vessel (2000) and information related to the operation of the induction heating device (1000). For example, the display unit may display a GUI (Graphical User Interface) corresponding to identification information or product type information of the cooking vessel (2000). For example, the speaker may output an audio signal related to the operation of the induction heating device (1000).

[0065] In one embodiment, the memory (1500) can store data input and output to the induction heating device (1000). For example, the memory (1500) can store a power transmission pattern of the induction heating device (1000). For example, the memory (1500) can store cooking progress information of the cooking vessel (2000). The memory (1500) can store at least one program for processing and controlling the processor (1600). The memory (1500) may include at least one type of storage medium among a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (e.g., SD or XD memory, etc.), a RAM (Random Access Memory), a SRAM (Static Random Access Memory), a ROM (Read-Only Memory), an EEPROM (Electrically Erasable Programmable Read-Only Memory), a PROM (Programmable Read-Only Memory), a magnetic memory, a magnetic disk, and an optical disk. At least one artificial intelligence model may be stored in the memory (1500). The induction heating device (1000) may also operate a web storage or cloud server that performs a storage function on the Internet separately from the memory (1500).

[0066] In one embodiment, the processor (1600) can control the overall operation of the induction heating device (1000). The processor (1600) can control the magnetic field generation circuit (1100), the detection unit (1200), the communication circuit (1300), and the user interface (1400) by executing programs stored in the memory (1500). The processor (1600) may be an artificial intelligence (AI) processor. For example, the AI ​​processor may be manufactured in the form of a dedicated hardware chip for artificial intelligence (AI). For example, the AI ​​processor may be manufactured as a part of an existing general-purpose processor (e.g., a CPU or an Application Processor (AP)) or a graphics-dedicated processor (e.g., a GPU) and mounted on the induction heating device (1000).

[0067] Hereinafter, the detection coil group (1230) and detection circuit (1240) of the induction heating device (1000) will be described with reference to FIG. 3a.

[0068] FIG. 3A is a block diagram illustrating a sensing coil group (1230) and a sensing circuit (1240) of an induction heating device (1000) according to one embodiment of the present disclosure. The sensing coil group (1230) may include M sensing coils (1231, 1232, 123M) (M is a natural number greater than or equal to 3). The sensing coil group (1230) may include a first sensing coil (1231), a second sensing coil (1232), a first sensing coil (1233), and an Mth sensing coil (123M). The sensing circuit (1240) may include a logic circuit (1242) and a light-emitting circuit (1243).

[0069] In one embodiment, a plurality of detection coils (1231, 1232, 123M) included in a detection coil group (1230) can detect whether a cooking vessel (2000) is positioned at the top. When the power of the induction heating device (1000) is turned on, a detection current may flow through each of the plurality of detection coils (1231, 1232, 123M). For example, a detection current may flow through each of the plurality of detection coils (1231, 1232, 123M) at designated intervals while the power of the induction heating device (1000) is turned on. An inductance may be generated at the top of the plurality of detection coils (1231, 1232, 123M) due to the detection current flowing through each of the plurality of detection coils (1231, 1232, 123M). The inductance generated on the upper portion of the plurality of sensing coils (1231, 1232, 123M) may have an inductance value set during the manufacturing of the induction heating device (1000).

[0070] In one embodiment, when a cooking vessel (2000) is not positioned above a plurality of detection coils (1231, 1232, 123M), the inductance value due to the detection current can be maintained without change. When a vessel unsuitable for use in the induction heating device (1000) is placed above a plurality of detection coils (1231, 1232, 123M), the inductance value due to the detection current can be maintained without change. For example, when a non-metallic vessel is placed above a plurality of detection coils (1231, 1232, 123M), the inductance value due to the detection current can be maintained at the same inductance value as when the cooking vessel (2000) is not placed.

[0071] In one embodiment, when a cooking vessel (2000) is positioned above a plurality of detection coils (1231, 1232, 123M), an inductance value may be changed by a detection current. When a cooking vessel (2000) including a magnetic material such as an IH metal is positioned above a plurality of detection coils (1231, 1232, 123M), an inductance value may be changed by the magnetic material included in the cooking vessel (2000). The plurality of detection coils (1231, 1232, 123M) may detect that the cooking vessel (2000) is placed based on a change in the inductance value by the detection current. For example, when a plurality of detection coils (1231, 1232, 123M) detect a change in the inductance value due to the detection current, they can detect that a cooking vessel (2000) is placed on the induction heating device (1000). For example, when a plurality of detection coils (1231, 1232, 123M) detect a change in the inductance value due to the detection current is greater than a specified threshold value, they can detect that a cooking vessel (2000) is placed on the induction heating device (1000).

[0072] In one embodiment, the plurality of detection coils (1231, 1232, 123M) can generate a plurality of detection signals. Each of the plurality of detection coils (1231, 1232, 123M) can set the level of each of the plurality of detection signals based on the detection result of the cooking vessel (2000) using the change in inductance value due to the detection current. Each of the plurality of detection coils (1231, 1232, 123M) can set the level of the detection signal to a low level when the cooking vessel (2000) is not positioned above the plurality of detection coils (1231, 1232, 123M) or a vessel that is not suitable for use in the induction heating device (1000) is positioned. Each of the plurality of detection coils (1231, 1232, 123M) can set the level of the detection signal to a high level when it detects that the cooking vessel (2000) is positioned above. Each of the plurality of detection coils (1231, 1232, 123M) can transmit a plurality of detection signals to the logic circuit (1242).

[0073] In one embodiment, the logic circuit (1242) may include N logic elements (1242_1, 1242_2, 1242_N). The logic circuit (1242) may include a first logic element (1242_1), a second logic element (1242_2), a first logic element (1242_1), a second logic element (1242_2), and an Nth logic element (1242_N). The first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N) may be exclusive OR (XOR) gates. The first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N) may receive output signals from a plurality of sense coils (1231, 1232, 123M). Each of the first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N) can set the level of the light-emitting signal based on the received output signal. Each of the first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N) can transmit the generated light-emitting signal to each of the N (N is a natural number greater than or equal to 3) light-emitting elements (1243_1, 1243_2, 1243_N) included in the light-emitting circuit (1243).

[0074] In one embodiment, the light emitting circuit (1243) may include N light emitting elements (1243_1, 1243_2, 1243_N). The light emitting circuit (1243) may include a first light emitting element (1243_1), a second light emitting element (1243_2), a first light emitting element (1243_2), and an Nth light emitting element (1243_N). The first light emitting element (1243_1), the second light emitting element (1243_2), and the Nth light emitting element (1243_N) may be light emitting diodes (LEDs). The first light-emitting element (1243_1), the second light-emitting element (1243_2), and the Nth light-emitting element (1243_N) can receive light-emitting signals from the first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N), respectively. The first light-emitting element (1243_1), the second light-emitting element (1243_2), and the Nth light-emitting element (1243_N) can emit light based on the light-emitting signals.

[0075] Hereinafter, the sensing coil group (1230) and sensing circuit (1240) of the induction heating device (1000) will be described with reference to FIG. 3B. The sensing circuit (1240) of FIG. 3B may further include a signal collection circuit (1241) compared to FIG. 3A. The remaining components of FIG. 3B may have substantially the same structure and function as those of FIG. 3A.

[0076] FIG. 3B is a block diagram illustrating a sensing coil group (1230) and a sensing circuit (1240) of an induction heating device (1000) according to one embodiment of the present disclosure. The sensing coil group (1230) may include M sensing coils (1231, 1232, 123M) (M is a natural number greater than or equal to 3). The sensing coil group (1230) may include a first sensing coil (1231), a second sensing coil (1232), a , and an M-th sensing coil (123M). The sensing circuit (1240) may include a signal collection circuit (1241), a logic circuit (1242), and a light-emitting circuit (1243).

[0077] In one embodiment, a plurality of detection coils (1231, 1232, 123M) included in a detection coil group (1230) can detect whether a cooking vessel (2000) is positioned at the top. Each of the plurality of detection coils (1231, 1232, 123M) can change a detection signal to a high level when the cooking vessel (2000) is positioned at the top. Each of the plurality of detection coils (1231, 1232, 123M) can transmit a plurality of detection signals to a signal collection circuit (1241) included in a detection circuit (1240).

[0078] In one embodiment, the signal collection circuit (1241) may be a chip that supports multiple inputs and multiple outputs. For example, the signal collection circuit (1241) may be a chip that receives eight signals as inputs and outputs two signals. However, the present invention is not limited thereto, and the signal collection circuit (1241) may be a chip that can receive multiple signals as inputs and output multiple signals. The signal collection circuit (1241) may receive multiple detection signals from each of the multiple detection coils (1231, 1232, 123M). The signal collection circuit (1241) may set the level of the output signal based on the multiple detection signals received. When at least one of the plurality of detection coils (1231, 1232, 123M) included in the detection coil group (1230) detects that the cooking vessel (2000) is located at the top, the signal collection circuit (1241) can receive a high-level detection signal. When the signal collection circuit (1241) receives a high-level detection signal from at least one of the plurality of detection coils (1231, 1232, 123M), the signal collection circuit (1241) can set the output signal to a high level. The signal collection circuit (1241) can transmit the output signal to each of N logic elements (1242_1, 1242_2, 1242_N) included in the logic circuit (1242) (N is a natural number greater than or equal to 3).

[0079] In one embodiment, the logic circuit (1242) may include N logic elements (1242_1, 1242_2, 1242_N). The logic circuit (1242) may include a first logic element (1242_1), a second logic element (1242_2), and an Nth logic element (1242_N). The first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N) may be exclusive OR (XOR) gates. The first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N) may receive an output signal from the signal collection circuit (1241). Each of the first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N) can set the level of the light-emitting signal based on the received output signal. Each of the first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N) can transmit the generated light-emitting signal to each of the N (N is a natural number greater than or equal to 3) light-emitting elements (1243_1, 1243_2, 1243_N) included in the light-emitting circuit (1243).

[0080] In one embodiment, the light emitting circuit (1243) may include N light emitting elements (1243_1, 1243_2, 1243_N). The light emitting circuit (1243) may include a first light emitting element (1243_1), a second light emitting element (1243_2), a first light emitting element (1243_2), and an Nth light emitting element (1243_N). The first light emitting element (1243_1), the second light emitting element (1243_2), and the Nth light emitting element (1243_N) may be light emitting diodes (LEDs). The first light-emitting element (1243_1), the second light-emitting element (1243_2), and the Nth light-emitting element (1243_N) can receive light-emitting signals from the first logic element (1242_1), the second logic element (1242_2), and the Nth logic element (1242_N), respectively. The first light-emitting element (1243_1), the second light-emitting element (1243_2), and the Nth light-emitting element (1243_N) can emit light based on the light-emitting signals.

[0081] Below, the structure of the unit circuit board (1011) of the induction heating device (1000) will be described with reference to Fig. 4a.

[0082] FIG. 4A is a drawing showing a unit circuit board (1011) in an induction heating device (1000) according to one embodiment of the present disclosure. A plurality of unit circuit boards (1011) may be arranged under an upper plate (1010) of the induction heating device (1000). FIG. 4 shows one unit circuit board (1011) among the plurality of unit circuit boards (1011). The unit circuit board (1011) may include at least one sub-circuit board (1201, 1202), a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), and a plurality of heating coils (1121, 1122).

[0083] In one embodiment, the unit circuit board (1011) may include at least one sub-circuit board (1201, 1202). For example, as illustrated in FIG. 4A, the unit circuit board (1011) may include a first sub-circuit board (1201) and a second sub-circuit board (1202). However, the present invention is not limited thereto, and the unit circuit board (1011) may include one sub-circuit board or may include three or more sub-circuit boards.

[0084] In one embodiment, the first sub-circuit board (1201) and the second sub-circuit board (1202) may be arranged adjacent to each other. For example, as illustrated in FIG. 4A, the first sub-circuit board (1201) and the second sub-circuit board (1202) may be arranged adjacent to each other in the horizontal direction. However, the present invention is not limited thereto, and the first sub-circuit board (1201) and the second sub-circuit board (1202) may be arranged adjacent to each other in the vertical direction, or may be arranged adjacent to each other in the diagonal direction.

[0085] In one embodiment, at least one sub-circuit board (1201, 1202) may include a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). The first sub-circuit board (1201) may include four sensing coils arranged in a 2X2 type. For example, as illustrated in FIG. 4, the first sub-circuit board (1201) may include a first sensing coil (1231), a second sensing coil (1232), a third sensing coil (1233), and a fourth sensing coil (1234). The second sub-circuit board (1202) may include four sensing coils arranged in a 2X2 type. For example, as illustrated in FIG. 4A, the second sub-circuit board (1202) may include a fifth sensing coil (1235), a sixth sensing coil (1236), a seventh sensing coil (1237), and an eighth sensing coil (1238). However, the present invention is not limited thereto, and each of the first sub-circuit board (1201) and the second sub-circuit board (1201) may include a plurality of sensing coils that are spaced apart from each other. Each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may have a circular ring shape. However, it is not limited thereto, and each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may have a multi-layered ring shape.

[0086] In one embodiment, the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may be disposed on a heat-resistant substrate. For example, each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may be disposed on the heat-resistant PCB in a printed electronics manner. However, the present invention is not limited thereto, and each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may be formed by replacing at least a portion of the plurality of heating coils (1121, 1122).

[0087] In one embodiment, a plurality of heating coils (1121, 1122) may be disposed beneath a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). The plurality of heating coils (1121, 1122) may be individually disposed beneath at least one sub-circuit board (1201, 1202). For example, the first heating coil (1121) may be disposed beneath the first sub-circuit board (1201). For example, the second heating coil (1122) may be disposed beneath the second sub-circuit board (1202). Each of the first heating coil (1121) and the second heating coil (1122) may have a rectangular ring shape. However, it is not limited thereto, and each of the first heating coil (1121) and the second heating coil (1122) may have a polygonal ring shape other than a circle or a square. The plurality of heating coils (1121, 1122) may be arranged on a separate heat-resistant PCB, different from the heat-resistant PCB on which the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) are arranged. For example, the plurality of heating coils (1121, 1122) may be arranged on the heat-resistant PCB in a printed electronic manner. However, it is not limited thereto, and at least some of the plurality of heating coils (1121, 1122) may be replaced to form a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238).

[0088] Hereinafter, the structure of the unit circuit board (1011) of the induction heating device (1000) will be described with reference to FIG. 4B. Compared to the unit circuit board (1011) of FIG. 4A, the unit circuit board (1011) of FIG. 4B may further include a signal collection circuit (1241). The remaining components of FIG. 4B may have substantially the same structure and function as those of FIG. 4A.

[0089] FIG. 4B is a drawing showing a unit circuit board (1011) in an induction heating device (1000) according to one embodiment of the present disclosure. A plurality of unit circuit boards (1011) may be arranged under an upper plate (1010) of the induction heating device (1000). FIG. 4B shows one unit circuit board (1011) among the plurality of unit circuit boards (1011). The unit circuit board (1011) may include at least one sub-circuit board (1201, 1202), a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), a plurality of heating coils (1121, 1122), and a signal collection circuit (1241).

[0090] In one embodiment, the unit circuit board (1011) may include at least one sub-circuit board (1201, 1202). For example, as illustrated in FIG. 4, the unit circuit board (1011) may include a first sub-circuit board (1201) and a second sub-circuit board (1202). However, the present invention is not limited thereto, and the unit circuit board (1011) may include one sub-circuit board or may include three or more sub-circuit boards.

[0091] In one embodiment, the first sub-circuit board (1201) and the second sub-circuit board (1202) may be arranged adjacent to each other. For example, as illustrated in FIG. 4B, the first sub-circuit board (1201) and the second sub-circuit board (1202) may be arranged adjacent to each other in the horizontal direction. However, the present invention is not limited thereto, and the first sub-circuit board (1201) and the second sub-circuit board (1202) may be arranged adjacent to each other in the vertical direction, or may be arranged adjacent to each other in the diagonal direction.

[0092] In one embodiment, at least one sub-circuit board (1201, 1202) may include a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). The first sub-circuit board (1201) may include four sensing coils arranged in a 2X2 type. For example, as illustrated in FIG. 4B, the first sub-circuit board (1201) may include a first sensing coil (1231), a second sensing coil (1232), a third sensing coil (1233), and a fourth sensing coil (1234). The second sub-circuit board (1202) may include four sensing coils arranged in a 2X2 type. For example, as illustrated in FIG. 4, the second sub-circuit board (1202) may include a fifth sensing coil (1235), a sixth sensing coil (1236), a seventh sensing coil (1237), and an eighth sensing coil (1238). However, the present invention is not limited thereto, and each of the first sub-circuit board (1201) and the second sub-circuit board (1201) may include a plurality of sensing coils that are spaced apart from each other. Each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may have a circular ring shape. However, it is not limited thereto, and each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may have a multi-layered ring shape.

[0093] In one embodiment, a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may be disposed on a heat-resistant substrate. For example, each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may be disposed on a heat-resistant PCB in a printed electronics manner.

[0094] In one embodiment, a plurality of heating coils (1121, 1122) may be disposed beneath a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). The plurality of heating coils (1121, 1122) may be individually disposed beneath at least one sub-circuit board (1201, 1202). For example, the first heating coil (1121) may be disposed beneath the first sub-circuit board (1201). For example, the second heating coil (1122) may be disposed beneath the second sub-circuit board (1202). Each of the first heating coil (1121) and the second heating coil (1122) may have a rectangular ring shape. However, it is not limited thereto, and each of the first heating coil (1121) and the second heating coil (1122) may have a polygonal ring shape other than a circle or a square. The plurality of heating coils (1121, 1122) may be arranged on a separate heat-resistant PCB, different from the heat-resistant PCB on which the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) are arranged. For example, the plurality of heating coils (1121, 1122) may be arranged on the heat-resistant PCB in a printed electronic manner.

[0095] In one embodiment, the signal collection circuit (1241) may be disposed between the first sub-circuit board (1201) and the second sub-circuit board (1202). However, the present invention is not limited thereto, and the signal collection circuit (1241) may be disposed on the unit circuit board (1011) so as not to overlap the first sub-circuit board (1201) and the second sub-circuit board (1202).

[0096] Hereinafter, the electrical connection structure of a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6), and a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) will be described with reference to FIG. 5a.

[0097] FIG. 5a is a drawing showing a unit circuit board (1011) in an induction heating device (1000) according to one embodiment of the present disclosure.

[0098] In one embodiment, a plurality of sense coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) and a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) may be electrically connected. A plurality of sense coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) and a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) may be connected via independent wiring. Each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can generate a plurality of detection signals. The plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can set the level of the detection signal to a high level when the cooking vessel (2000) is placed.

[0099] In one embodiment, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) may be arranged in an area excluding an area where a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) are arranged. FIG. 5A illustrates a case where a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) are arranged on a unit circuit board (1011). However, it is not limited thereto, and a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) may be placed under the upper plate (1010) of the induction heating device (1000) excluding the area where the unit circuit board (1011) is placed. When a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) are arranged on a unit circuit board (1011), the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) may be arranged in an edge area of ​​the unit circuit board (1011) or in the center of the unit circuit board (1011).

[0100] In one embodiment, the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can receive the plurality of sense signals from the plurality of sense coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). The plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can receive the plurality of sense signals from each of the plurality of sense coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can receive two detection signals from two detection coils among the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238).

[0101] In one embodiment, the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can generate the plurality of output signals. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can combine two sense signals. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can set the level of each of the plurality of output signals based on the result of combining the two sense signals.

[0102] In one embodiment, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can independently receive a plurality of sensing signals from each of a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236) of the processor (1600). The plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can receive a plurality of detection signals from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236) independently of the processor (1600), which means that each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can receive a plurality of detection signals from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236) without being electrically connected to the processor (1600) or without a connection relationship for exchanging electrical signals. It may include that the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) may operate independently from the processor (1600). The plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) may not be connected to the processor (1600) by wiring. The plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) may not receive a control signal from the processor (1600). A plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can receive a plurality of detection signals from each of a plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236) while not receiving a control signal from the processor (1600).

[0103] In one embodiment, each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can set the level of the light emission signal based on the levels of two detection signals received. For example, the first logic element (1242_1) can set the level of the light emission signal based on the first level of the first output signal received and the second level of the second output signal received. The first logic element (1242_1) can generate the light emission signal when the first level and the second level are different levels. For example, the first logic element (1242_1) can generate the light emission signal when the first output signal is at a high level and the second output signal is at a low level. For example, the first logic element (1242_1) can generate a light emission signal when the first output signal is at a low level and the second output signal is at a high level. For example, the first logic element (1242_1) can not generate a light emission signal when both the first output signal and the second output signal are at a low level. For example, the first logic element (1242_1) can not generate a light emission signal when both the first output signal and the second output signal are at a high level. The first logic element (1242_1) can transfer the generated light emission signal to the first light emission element (1243_1).

[0104] In one embodiment, each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) may be arranged in front of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6). The plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) may be arranged in an area excluding an area in which the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) are arranged. In Fig. 5a, a case is illustrated where a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) are arranged on a unit circuit board (1011). However, the present invention is not limited thereto, and a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) may be arranged under the upper plate (1010) of the induction heating device (1000) excluding the area where the unit circuit board (1011) is arranged. When a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) are arranged on a unit circuit board (1011), the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) may be arranged in an edge area of ​​the unit circuit board (1011) or in the center of the unit circuit board (1011).

[0105] In one embodiment, a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) may be electrically connected to each of a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6). A plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) may be connected to each of a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) in a one-to-one correspondence. The anode of each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) may be connected to the rear end of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6). The cathode of each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) may be grounded. For example, the cathode of each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) may be connected to a ground structure (not shown) provided in the housing of the induction heating device (1000).

[0106] In one embodiment, each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) can receive a light-emitting signal from each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6). For example, the first light-emitting element (1243_1) can receive a light-emitting signal from the first logic element (1242_1). Each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) can output light based on the received light-emitting signal. For example, the first light-emitting element (1243_1) can output light when it receives a light-emitting signal from the first logic element (1242_1).

[0107] In one embodiment, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can operate at least some of a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) based on a plurality of output signals to indicate an area where a cooking vessel (2000) is placed. The plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can set a level of a light-emitting signal. Among the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), at least one detection coil located in an area where a cooking vessel (2000) is placed can generate detection signals of different levels. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can set the level of a light-emitting signal by processing the plurality of detection signals based on operating characteristics. Among the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6), at least one logic element that receives detection signals of different levels can output a high-level light-emitting signal. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can operate at least some of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) to output light in an area where the cooking vessel (2000) is placed.

[0108] In one embodiment, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can operate a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) independently of the processor (1600). Accordingly, even if the processor (1600) and the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) are not connected to each other, the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6) can operate the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6). Since the processor (1600) and the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) do not need to be connected to each other, the plurality of wires for connecting the processor (1600) and the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) can be omitted. Accordingly, the number of the plurality of wires connected to the processor (1600) can be reduced, thereby reducing the number of pins (pjn) used for connecting the wires in the processor (1600) and the data processing amount of the processor (1600). In addition, since a plurality of wires branching from the processor (1600) and connected to each of a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6) can be omitted, the signal wiring structure of the induction heating device (1000) can be simplified.

[0109] Hereinafter, the electrical connection structure of multiple detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) and signal collection circuit (1241) will be described with reference to FIG. 5b.

[0110] FIG. 5B is a diagram illustrating a unit circuit board (1011) in an induction heating device (1000) according to one embodiment of the present disclosure. The unit circuit board (1011) of FIG. 5B may further include a signal collection circuit (1241) compared to the unit circuit board (1011) of FIG. 5A. The plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) of FIG. 5B may have substantially the same structure and function as the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) of FIG. 5A.

[0111] In one embodiment, the signal collection circuit (1241) may be electrically connected to a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). The signal collection circuit (1241) and each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may be connected through independent wiring. The signal collection circuit (1241) may have a plurality of input signal terminals. Each of the plurality of input signal terminals of the signal collection circuit (1241) may be connected to a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). For example, the first detection coil (1231) may be connected to a first input signal terminal of the signal collection circuit (1241). For example, the second detection coil (1232) may be connected to a second input signal terminal of the signal collection circuit (1241). For example, the third detection coil (1233) may be connected to a third input signal terminal of the signal collection circuit (1241). For example, the fourth detection coil (1234) may be connected to a fourth input signal terminal of the signal collection circuit (1241). For example, the fifth detection coil (1235) may be connected to a fifth input signal terminal of the signal collection circuit (1241). For example, the sixth detection coil (1236) may be connected to a sixth input signal terminal of the signal collection circuit (1241). For example, the seventh detection coil (1237) may be connected to the seventh input signal terminal of the signal collection circuit (1241). For example, the eighth detection coil (1238) may be connected to the eighth input signal terminal of the signal collection circuit (1241).

[0112] In one embodiment, the signal collection circuit (1241) can receive a plurality of detection signals from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). The signal collection circuit (1241) can collect the plurality of detection signals received from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). The signal collection circuit (1241) can set the level of each of the plurality of output signals based on the result of collecting the plurality of detection signals.

[0113] In one embodiment, the signal collection circuit (1241) can independently receive a plurality of detection signals from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) from the processor (1600). The fact that the signal collection circuit (1241) can receive a plurality of detection signals from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) independently of the processor (1600) may include that the signal collection circuit (1241) can receive a plurality of detection signals from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) without being electrically connected to the processor or without a connection relationship that transmits and receives electrical signals. The signal collection circuit (1241) can operate independently of the processor (1600). The signal collection circuit (1241) may not be connected to the processor (1600) by wiring. The signal collection circuit (1241) may not receive a control signal from the processor (1600). The signal collection circuit (1241) may receive a plurality of detection signals from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) while not receiving a control signal from the processor (1600).

[0114] Hereinafter, the electrical connection structure of a signal collection circuit (1241), a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7), and a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) will be described with reference to FIG. 6.

[0115] FIG. 6 is a drawing showing a unit circuit board (1011) in an induction heating device (1000) according to one embodiment of the present disclosure.

[0116] In one embodiment, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) may be electrically connected to a signal collection circuit (1241). The plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) may be arranged in a boundary area of ​​a first sub-circuit board (1201) and a second sub-circuit board (1202). The boundary area of ​​the first sub-circuit board (1201) and the second sub-circuit board (1202) may be a corner area of ​​each of the first sub-circuit board (1201) and the second sub-circuit board (1202). The boundary area of ​​the first sub-circuit board (1201) and the second sub-circuit board (1202) may be an area provided along the edges of each of the first sub-circuit board (1201) and the second sub-circuit board (1202). The boundary area of ​​the first sub-circuit board (1201) and the second sub-circuit board (1202) may be an area surrounding each of the first sub-circuit board (1201) and the second sub-circuit board (1202).

[0117] In one embodiment, each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) may be arranged to be spaced apart from each other in a boundary area of ​​the first sub-circuit board (1201) and the second sub-circuit board (1202). For example, the first logic element (1242_1) may be arranged in a boundary area provided between the first sub-circuit board (1201) and the second sub-circuit board (1202). For example, the second logic element (1242_2) may be arranged in a boundary area provided to be adjacent to an upper edge of the first sub-circuit board (1201). For example, the third logic element (1242_3) may be arranged in a boundary area provided to be adjacent to a left edge of the first sub-circuit board (1201). For example, the fourth logic element (1242_4) may be placed in a boundary area provided to be adjacent to a lower edge of the first sub-circuit board (1201). For example, the fifth logic element (1242_5) may be placed in a boundary area provided to be adjacent to an upper edge of the second sub-circuit board (1202). For example, the sixth logic element (1242_6) may be placed in a boundary area provided to be adjacent to a right edge of the second sub-circuit board (1202). For example, the seventh logic element (1242_7) may be placed in a boundary area provided to be adjacent to a lower edge of the second sub-circuit board (1202).

[0118] In one embodiment, the signal collection circuit (1241) may provide a plurality of output signals to each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) based on a plurality of detection signals in a separate state from the processor (1600). The signal collection circuit (1241) may independently set a level of each of the plurality of output signals to be provided to each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) based on the received plurality of detection signals.

[0119] In one embodiment, each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can receive at least one of the plurality of output signals from the signal collection circuit (1241). For example, the first logic element (1242_1), the second logic element (1242_2), the third logic element (1242_3), and the fourth logic element (1242_4) can receive a first output signal from the signal collection circuit (1241). For example, the first logic element (1242_1), the fifth logic element (1242_5), the sixth logic element (1242_6), and the seventh logic element (1242_7) can receive a second output signal from the signal collection circuit (1241).

[0120] In one embodiment, each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can set the level of the light emission signal based on the level of each of the received output signals. For example, the first logic element (1242_1) can set the level of the light emission signal based on the first level of the received first output signal and the second level of the received second output signal. The first logic element (1242_1) can generate the light emission signal when the first level and the second level are different levels. For example, the first logic element (1242_1) can generate the light emission signal when the first output signal is at a high level and the second output signal is at a low level. For example, the first logic element (1242_1) can generate a light emission signal when the first output signal is at a low level and the second output signal is at a high level. For example, the first logic element (1242_1) can not generate a light emission signal when both the first output signal and the second output signal are at a low level. For example, the first logic element (1242_1) can not generate a light emission signal when both the first output signal and the second output signal are at a high level. The first logic element (1242_1) can transfer the generated light emission signal to the first light emission element (1243_1).

[0121] In one embodiment, a plurality of light emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) may be electrically connected to each of a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7). A plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) can be connected in a one-to-one correspondence with each of a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7). The anode of each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) may be connected to the rear end of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7). The cathode of each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) may be grounded. For example, the cathodes of each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) may be connected to a ground structure (not shown) provided in the housing of the induction heating device (1000). Each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) may be arranged to be spaced apart from each other in the boundary area of ​​the first sub-circuit board (1201) and the second sub-circuit board (1202).However, it is not limited thereto, and each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) may be arranged adjacent to the boundary areas of the first sub-circuit board (1201) and the second sub-circuit board (1202) so as to output light through the boundary area.

[0122] In one embodiment, each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) can receive a light-emitting signal from each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7). For example, the first light-emitting element (1243_1) can receive a light-emitting signal from the first logic element (1242_1). Each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) can output light based on the received light-emitting signal. For example, the first light-emitting element (1243_1) can output light when it receives the light-emitting signal from the first logic element (1242_1).

[0123] In one embodiment, a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) can output light through a boundary area formed between at least one sub-circuit board (1201, 1202). For example, a first light-emitting element (1243_1) can output light to a boundary area provided between a first sub-circuit board (1201) and a second sub-circuit board (1202) when receiving a light-emitting signal from a first logic element (1242_1). For example, when a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) are arranged to overlap with a boundary area, the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) can directly output light to the boundary area. For example, when a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) are arranged so as not to overlap with the boundary area, the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) can output light to the boundary area through the light-guiding structure.

[0124] In one embodiment, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can control a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) to output light at a corner portion corresponding to an edge of a cooking vessel (2000) based on a plurality of output signals. A plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can process a plurality of output signals received by the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) to set the level of the light emission signal. At least one logic element located at a corner portion corresponding to the edge of the cooking vessel (2000) among the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can receive output signals of different levels and output a high-level light emission signal. Among the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7), the remaining logic elements located in the center of the cooking vessel (2000) or in an area where the cooking vessel (2000) is not placed can receive output signals of the same level and output a low-level light-emitting signal. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can set the level of the light-emitting signal by processing the plurality of output signals based on its operating characteristics.Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can operate the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) to output light at a corner portion corresponding to the edge of the cooking vessel (2000).

[0125] In one embodiment, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can operate a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) independently of the processor (1600). Accordingly, even if the processor (1600) and the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) are not connected to each other, the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can operate the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7). Since the processor (1600) and the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) do not need to be connected to each other, the plurality of wires for connecting the processor (1600) and the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) can be omitted. Accordingly, the number of the plurality of wires connected to the processor (1600) can be reduced, thereby reducing the number of pins (pjn) used for connecting the wires in the processor (1600) and the data processing amount of the processor (1600). In addition, a plurality of wires branching from the processor (1600) and connected to each of a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) can be omitted, thereby simplifying the signal wiring structure of the induction heating device (1000).

[0126] Below, the level of the light emission signal according to the level of the output signal input to multiple logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) will be explained with reference to FIG. 7.

[0127] FIG. 7 is a diagram showing a first logic element (1242_1) of an induction heating device (1000) according to one embodiment of the present disclosure. Since the configuration and function of each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of the induction heating device (1000) are the same, the description related to the level of the output signal according to the level of the input signal of the first logic element (1242_1) can be equally applied to the second to seventh logic elements (1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7).

[0128] In one embodiment, a first logic element (1242_1) may include a first terminal (A), a second terminal (B), and an output terminal (Out). The first logic element (1242_1) may be an exclusive OR (XOR) gate. The first logic element (1242_1) may receive a first output signal through the first terminal (A). The first logic element (1242_1) may receive a second output signal through the second terminal (B). The first logic element (1242_1) may set a level of a light-emitting signal to be output to the output terminal (Out) based on a first level of the first output signal and a second level of the second output signal.

[0129] In one embodiment, the first logic element (1242_1) can set the level of the light emitting signal output to the output terminal (Out) to a low level (0) when the first output signal input to the first terminal (A) is a low level (0) and the second output signal input to the second terminal (B) is a low level (0). The first logic element (1242_1) can set the level of the light emitting signal output to the output terminal (Out) to a high level (1) when the first output signal input to the first terminal (A) is a high level (1) and the second output signal input to the second terminal (B) is a low level (0). The first logic element (1242_1) can set the level of the light emitting signal output to the output terminal (Out) to a high level (1) when the first output signal input to the first terminal (A) is a low level (0) and the second output signal input to the second terminal (B) is a high level (1). The first logic element (1242_1) can set the level of the light emitting signal output to the output terminal (Out) to a low level (0) when the first output signal input to the first terminal (A) is a high level (1) and the second output signal input to the second terminal (B) is a high level (1).

[0130] In one embodiment, when the first logic element (1242_1) receives output signals of different levels from the first terminal (A) and the second terminal (B), the level of the light emission signal output through the output terminal (Out) can be set to a high level (1). When the first logic element (1242_1) receives output signals of the same level from the first terminal (A) and the second terminal (B), the level of the light emission signal output through the output terminal (Out) can be set to a low level (0).

[0131] In one embodiment, when the first logic element (1242_1) is located at a corner portion corresponding to an edge of the cooking vessel (2000), the first logic element (1242_1) can receive output signals of different levels from the first terminal (A) and the second terminal (B). When the first logic element (1242_1) is located at a corner portion corresponding to an edge of the cooking vessel (2000), the first logic element (1242_1) can output a light-emitting signal of a high level (1) through the output terminal (Out). When the first logic element (1242_1) is located at a central portion of the cooking vessel (2000) or an area where the cooking vessel (2000) is not placed, the first logic element (1242_1) can receive output signals of the same level from the first terminal (A) and the second terminal (B). When the first logic element (1242_1) is located in the center of the cooking vessel (2000) or in an area where the cooking vessel (2000) is not placed, the first logic element (1242_1) can output a low level (0) light-emitting signal through the output terminal (Out). Based on the operating characteristics of the first logic element (1242_1), the first logic element (1242_1) can operate the first light-emitting element (1243_1) to output light when the first logic element (1242_1) and the first light-emitting element (1243_1) are located at a corner portion corresponding to the edge of the cooking vessel (2000). Accordingly, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can operate a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) to output light at a corner portion of the cooking vessel (2000).

[0132] Hereinafter, the operation of the first to eighth sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), the signal collection circuit (1241), and the first logic element (1242_1) of the induction heating device (1000) will be described with reference to FIG. 8.

[0133] FIG. 8 is a diagram showing the configuration of a first detection coil group (1230_1) and a second detection coil group (1230_2) of an induction heating device (1000) according to one embodiment of the present disclosure, and the operation of a signal collection circuit (1241) and a first logic element (1242_1).

[0134] In one embodiment, first to eighth sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may be arranged on the top plate (1010) of the induction heating device (1000). The first to fourth sensing coils (1231, 1232, 1233, 1234) may be arranged on the first sub-circuit board (1201). The fifth to eighth sensing coils (1235, 1236, 1237, 1238) may be arranged on the second sub-circuit board (1202). The first to fourth detection coils (1231, 1232, 1233, 1234) arranged on the first sub-circuit board (1201) may be referred to as a first detection coil group (1230_1). The fifth to eighth detection coils (1235, 1236, 1237, 1238) arranged on the second sub-circuit board (1202) may be referred to as a second detection coil group (1230_2).

[0135] In one embodiment, each of the first to eighth detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can detect whether a cooking vessel (2000) is placed in a corresponding area of ​​the top plate (1010). Each of the first to eighth detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can set the level of the first to eighth detection signals based on whether the cooking vessel (2000) is placed. Each of the first to eighth detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can set the level of the first to eighth detection signals to a high level when the cooking vessel (2000) is placed in a corresponding area of ​​the top plate (1010). Each of the first to eighth detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can transmit the first to eighth detection signals to the signal collection circuit (1241).

[0136] In one embodiment, the signal collection circuit (1241) can receive the first to eighth detection signals. The signal collection circuit (1241) can set the levels of the first output signal and the second output signal based on the received first to eighth detection signals. The signal collection circuit (1241) can set the first output signal to a high state when at least one detection signal among the first to fourth detection signals is in a high state. The signal collection circuit (1241) can set the first output signal to a low state when all of the first to fourth detection signals are in a low state. The signal collection circuit (1241) can set the second output signal to a high state when at least one detection signal among the fifth to eighth detection signals is in a high state. The signal collection circuit (1241) can set the second output signal to a low state when all of the fifth to eighth detection signals are in a low state. The signal collection circuit (1241) can transmit the first output signal and the second output signal to the first logic element (1242_1).

[0137] In one embodiment, the first logic element (1242_1) can receive a first output signal and a second output signal from the signal collection circuit (1241). The first logic element (1242_1) can set a level of the first light emission signal based on the received first output signal and the second output signal. The first logic element (1242_1) can set the first light emission signal to a high state when only one of the first output signal and the second output signal is in a high state. The first logic element (1242_1) can set the first light emission signal to a high state when the states of the first output signal and the second output signal are different from each other. The first logic element (1242_1) can set the first light emission signal to a low state when the states of the first output signal and the states of the second output signal are the same. The first logic element (1242_1) can transmit the first light-emitting signal to the first light-emitting element (1243_1). Accordingly, the first logic element (1242_1) can operate the first light-emitting element (1243_1) so that the first light-emitting element (1243_1) emits light when the area where the first logic element (1242_1) and the first light-emitting element (1243_1) are arranged corresponds to the boundary area of ​​the cooking vessel (2000).

[0138] Hereinafter, a control method of an induction heating device (1000) will be described with reference to FIG. 9.

[0139] FIG. 9 is a flowchart illustrating a control method of an induction heating device (1000) according to one embodiment of the present disclosure.

[0140] In operation 910, each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) of the induction heating device (1000) according to one embodiment can independently set the levels of the plurality of sensing signals based on the sensing results of the cooking device (2000) from the processor (1600). The cooking device (2000) may also be referred to as a cooking vessel (2000). At least one of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) of the induction heating device (1000) can independently detect a cooking vessel (2000) placed in a cooking area and heated based on a cooking operation, independently of a processor (1600) that controls the overall cooking operation of the induction heating device (1000). At least one sensing coil can generate a plurality of sensing signals based on the result of sensing the cooking vessel (2000) independently of the processor (1600).

[0141] When the induction heating device (1000) is turned on, a sensing current may flow through each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). Inductance may be generated in the upper portion of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) due to the sensing current flowing through each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238).

[0142] In one embodiment, when a cooking vessel (2000) is not positioned above a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), the inductance value due to the sensing current can be maintained without changing. When a vessel unsuitable for use in the induction heating device (1000) is positioned above a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), the inductance value due to the sensing current can be maintained without changing. For example, when a non-metallic container is placed on top of a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), the inductance value due to the sensing current can be maintained at the same inductance value as when the cooking container (2000) is not placed.

[0143] In one embodiment, when a cooking vessel (2000) is positioned above a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), an inductance value may be changed by a sensing current. When a cooking vessel (2000) including a magnetic material such as an IH metal is positioned above a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), an inductance value may be changed by a magnetic material included in the cooking vessel (2000). A plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can detect that a cooking vessel (2000) is placed based on a change in an inductance value due to a detection current. For example, when a plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) detect a change in an inductance value due to a detection current, they can detect that a cooking vessel (2000) is placed on the induction heating device (1000). For example, a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can detect that a cooking vessel (2000) is placed on an induction heating device (1000) when the amount of change in the inductance value due to the sensing current is greater than a specified threshold value.

[0144] In one embodiment, each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can generate a plurality of detection signals. Each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can set the level of each of the plurality of detection signals based on the detection result of the cooking vessel (2000) using the change in inductance value due to the detection current. Each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can set the level of the detection signal to a low level when a cooking vessel (2000) is not positioned above the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) or a vessel unsuitable for use in the induction heating device (1000) is positioned. Each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can set the level of the detection signal generated from the corresponding detection coil to a high level when a cooking vessel (2000) is placed above the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238).

[0145] In one embodiment, the induction heating device (1000) can receive a plurality of detection signals from a plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) arranged on a unit circuit board (1011). A plurality of unit circuit boards (1011) can be arranged on a top plate (1010) of the induction heating device (1000). A plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can be arranged on each of the plurality of unit circuit boards (1011). The signal collection circuit (1241) of the induction heating device (1000) can receive a plurality of detection signals from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238).

[0146] In one embodiment, some of the sensing coils (e.g., the first to fourth sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238)) may belong to a first sensing coil group arranged on a first sub-circuit board (1201). Among the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), the remaining detection coils (e.g., the fifth to eighth detection coils (1235, 1236, 1237, 1238)) may belong to the second detection coil group arranged on the second sub-circuit board (1202).

[0147] In one embodiment, each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may be positioned below the top plate (1010) of the induction heating device (1000). Each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) may detect whether a cooking vessel (2000) is positioned in a corresponding area of ​​the top plate (1010) of the induction heating device (1000). Each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can set the level of the detection signal generated from the corresponding detection coil to a high level when the cooking vessel (2000) is placed in the corresponding area of ​​the top plate (1010) of the induction heating device (1000).

[0148] In operation 920, each of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) of the induction heating device (1000) according to one embodiment can independently provide a plurality of output signals based on the levels of the plurality of sensing signals to each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of the processor (1600). At least one of the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) can independently of the processor (1600) provide a plurality of output signals based on the plurality of sensing signals to a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of the induction heating device (1000). For example, the induction heating device (1000) can provide a plurality of output signals to each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7, 1242_8) based on the level of each of the plurality of detection signals. The signal collection circuit (1241) of the induction heating device (1000) can set the level of each of the plurality of output signals based on the level of each of the plurality of received detection signals. The signal collection circuit (1241) can provide a plurality of output signals to each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) at the set level.

[0149] In one embodiment, the induction heating device (1000) can set the level of the first output signal based on detection signals received from some of the detection coils belonging to the first detection coil group (e.g., the first to fourth detection coils (1231, 1232, 1233, 1234)). The induction heating device (1000) can set the level of the first output signal to a high level when it receives a high-level detection signal from at least one detection coil group among some of the detection coils belonging to the first detection coil group. The induction heating device (1000) can set the level of the second output signal based on detection signals received from the remaining detection coils belonging to the second detection coil group (e.g., the fifth to eighth detection coils (1235, 1236, 1237, 1238)). The induction heating device (1000) can set the level of the second output signal to a high level when it receives a high level detection signal from at least one detection coil group among some detection coils belonging to the second detection coil group.

[0150] In operation 930, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of an induction heating device (1000) according to an embodiment may operate at least some of a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) to surround the periphery of the detected cooking appliance (2000) based on a plurality of output signals. A plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can operate at least some of a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) of an induction heating device (1000) based on a plurality of output signals. For example, the induction heating device (1000) can control the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) to output light from a corner portion corresponding to an edge of a cooking vessel (2000) based on a plurality of output signals. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of the induction heating device (1000) can receive a plurality of output signals. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of the induction heating device (1000) can set the level of the light emission signal based on the plurality of output signals received. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can provide a light emitting signal of a level set to the plurality of light emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7).

[0151] In one embodiment, each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of the induction heating device (1000) can receive two output signals. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can set the level of the light emission signal to a high level when the levels of the two received output signals are different from each other. For example, each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can set the level of the light emission signal to a high level when it receives a first output signal of a high level and a second output signal of a low level. For example, each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can set the level of the light emission signal to a high level when it receives a first output signal of a low level and a second output signal of a high level. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can set the level of the light emission signal to a low level when the levels of the two output signals received are the same. For example, each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can set the level of the light emission signal to a low level when it receives the first output signal at a low level and the second output signal at a low level. For example, each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can set the level of the light emission signal to a low level when it receives a first output signal of a high level and a second output signal of a high level.

[0152] In one embodiment, at least one logic element positioned at a corner portion corresponding to an edge of a cooking vessel (2000) among a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of an induction heating device (1000) can receive two output signals having different levels. At least one logic element positioned at a corner portion corresponding to an edge of the cooking vessel (2000) can provide a high-level light-emitting signal to at least one light-emitting element corresponding to the at least one logic element. Accordingly, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can operate a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) so that the light-emitting elements positioned at corner portions corresponding to the edges of the cooking vessel (2000) output light.

[0153] Hereinafter, referring to FIG. 10, the marking of the edge of the cooking vessel (2000) when the cooking vessel (2000) is placed on the induction heating device (1000) will be described.

[0154] FIG. 10 is a drawing showing an induction heating device (1000) according to one embodiment of the present disclosure indicating the edge of a cooking vessel (2000).

[0155] In one embodiment, a plurality of sub-circuit boards (1201) may be arranged in the induction heating device (1000). For example, as shown in FIG. 10, 22 sub-circuit boards (1201) may be arranged in the induction heating device (1000). However, the present invention is not limited thereto, and the induction heating device (1000) may be arranged with a number of sub-circuit boards (1201) less than or greater than the 22 illustrated in FIG. 10. At least one sub-circuit board (1201) may be utilized as a cooking area capable of inducing heating of the cooking vessel (2000).

[0156] In one embodiment, a cooking vessel (2000) may be placed on an induction heating device (1000). The cooking vessel (2000) placed on the induction heating device (1000) may overlap with at least one sub-circuit board (1201). For example, the cooking vessel (2000) may be overlapped with four sub-circuit boards (1201) in a 2X2 configuration on the upper left side.

[0157] In one embodiment, the induction heating device (1000) may display a first light emitting element (1031) at a corner portion corresponding to an edge of the cooking vessel (2000). As shown in FIG. 10, the first light emitting element (1031) may have a square shape surrounding the cooking vessel (2000). However, the present invention is not limited thereto, and the first light emitting element (1031) may have a circular shape surrounding the cooking vessel (2000) or a polygonal shape other than a square shape. The induction heating device (1000) may control a plurality of light emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) so that at least one light emitting element disposed at a corner portion corresponding to an edge of the cooking vessel (2000) outputs light. The induction heating device (1000) can output light by providing a high-level light-emitting signal to at least one light-emitting element positioned at a position corresponding to the first light-emitting unit (1031).

[0158] Hereinafter, referring to FIG. 11, the marking of the edge of a cooking vessel (2000) when a different type of cooking vessel (2000) is placed in a different position on an induction heating device (1000) will be described.

[0159] FIG. 11 is a drawing showing an induction heating device (1000) according to one embodiment of the present disclosure indicating the edge of a cooking vessel (2000).

[0160] In one embodiment, a cooking vessel (2000) may be placed on an induction heating device (1000). The cooking vessel (2000) placed on the induction heating device (1000) may overlap with at least one sub-circuit board (1201). For example, the cooking vessel (2000) may be overlapped with six sub-circuit boards (1201) in a 2X3 configuration on the upper right side.

[0161] In one embodiment, the induction heating device (1000) may display a second light emitting element (1032) at a corner portion corresponding to an edge of the cooking vessel (2000). As shown in FIG. 11, the second light emitting element (1032) may have a square shape surrounding the cooking vessel (2000). However, the present invention is not limited thereto, and the second light emitting element (1032) may have a circular shape surrounding the cooking vessel (2000) or a polygonal shape other than a square shape. The induction heating device (1000) may control a plurality of light emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) so that at least one light emitting element disposed at a corner portion corresponding to an edge of the cooking vessel (2000) outputs light. The induction heating device (1000) can output light by providing a high-level light-emitting signal to at least one light-emitting element positioned at a position corresponding to the second light-emitting unit (1032).

[0162] Hereinafter, referring to FIG. 12, the marking of the edges of each of the plurality of cooking containers (2100, 2200) when the plurality of cooking containers (2100, 2200) are placed on the induction heating device (1000) will be described.

[0163] FIG. 12 is a drawing showing an induction heating device (1000) according to one embodiment of the present disclosure, which marks the edges of each of a plurality of cooking vessels (2100, 2200).

[0164] In one embodiment, each of a plurality of cooking vessels (2100, 2200) may be placed in an induction heating device (1000). For example, a first cooking vessel (2100) and a second cooking vessel (2200) may be placed in the induction heating device (1000). However, the present invention is not limited thereto, and three or more cooking vessels may be placed in the induction heating device (1000). Each of the plurality of cooking vessels (2100, 2200) may overlap at least one sub-circuit board (1201). For example, the first cooking vessel (2100) may overlap four sub-circuit boards (1201) in a 2X2 configuration on the upper left side. For example, the second cooking vessel (2200) may overlap six sub-circuit boards (1201) in a 2X3 configuration on the upper right side.

[0165] In one embodiment, the induction heating device (1000) may display a plurality of light emitting portions (1033, 1034) at corner portions corresponding to edges of each of the plurality of cooking vessels (2100, 2200). For example, the induction heating device (1000) may display a third light emitting portion (1033) at a corner portion corresponding to an edge of a first cooking vessel (2100), and may display a fourth light emitting portion (1034) at a corner portion corresponding to an edge of a second cooking vessel (2200). As shown in FIG. 12, each of the plurality of light emitting portions (1033, 1034) may have a rectangular shape surrounding each of the plurality of cooking vessels (2100, 2200). However, it is not limited thereto, and each of the plurality of light emitting parts (1033, 1034) may have a circular shape surrounding each of the plurality of cooking containers (2100, 2200) or a polygonal shape excluding a square shape. The induction heating device (1000) can control the plurality of light emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) so that at least one light emitting element disposed at a corner portion corresponding to an edge of each of the plurality of cooking containers (2100, 2200) outputs light. The induction heating device (1000) can provide a high-level light emitting signal to at least one light emitting element disposed at a position corresponding to the third light emitting part (1033) and the fourth light emitting part (1034) so ​​as to output light.

[0166] In one embodiment, the induction heating device (1000) can set the colors of each of the plurality of light-emitting units (1033, 1034) corresponding to each of the plurality of cooking vessels (2100, 2200) to different colors. The induction heating device (1000) can set the first color of the third light-emitting unit (1033) surrounding a corner portion corresponding to the edge of the first cooking vessel (2100) and the second color of the fourth light-emitting unit (1034) surrounding a corner portion corresponding to the edge of the second cooking vessel (2200) to different colors. For example, the induction heating device (1000) can set the first color of the third light-emitting unit (1033) to red and the second color of the fourth light-emitting unit (1034) to green. However, the present invention is not limited thereto, and the induction heating device (1000) may set the first color of the third light emitting unit (1033) and the second color of the fourth light emitting unit (1034) to different colors that can be distinguished by the user of the induction heating device (1000). Accordingly, the user of the induction heating device (1000) may more easily identify each of the plurality of cooking vessels (2100, 2200) placed on the induction heating device (1000).

[0167] In one embodiment, the induction heating device (1000) can set the brightness of each of the plurality of light-emitting units (1033, 1034) corresponding to each of the plurality of cooking vessels (2100, 2200) to different brightnesses. The induction heating device (1000) can set the first brightness of the third light-emitting unit (1033) surrounding a corner portion corresponding to the edge of the first cooking vessel (2100) and the second brightness of the fourth light-emitting unit (1034) surrounding a corner portion corresponding to the edge of the second cooking vessel (2200) to different brightnesses. For example, the induction heating device (1000) can set the third light-emitting unit (1033) to the first brightness and the fourth light-emitting unit (1034) to the second brightness. The induction heating device (1000) can set the first brightness of the third light emitting unit (1033) and the second brightness of the fourth light emitting unit (1034) to different brightnesses that can be distinguished by the user of the induction heating device (1000). Accordingly, the user of the induction heating device (1000) can more easily identify each of the plurality of cooking vessels (2100, 2200) placed on the induction heating device (1000).

[0168] For example, the induction heating device (1000) can set the brightness of each of the plurality of light-emitting units (1033, 1034) corresponding to each of the plurality of cooking containers (2100, 2200) based on the temperature of each of the plurality of cooking containers (2100, 2200). The induction heating device (1000) can measure the temperature of each of the plurality of cooking containers (2100, 2200). For example, the induction heating device (1000) can measure that the temperature of the first cooking container (2100) is 50° C. and that the temperature of the second cooking container (2200) is 100° C. The induction heating device (1000) can set the light-emitting unit corresponding to the edge of the cooking container having the higher temperature among the plurality of cooking containers (2100, 2200) to a high brightness. For example, the induction heating device (1000) can set the second brightness of the fourth light emitting portion (1034) surrounding the second cooking vessel (2200) having a higher temperature among the first cooking vessel (2100) and the second cooking vessel (2200) to 100 lux. For example, the induction heating device (1000) can set the first brightness of the third light emitting portion (1033) surrounding the first cooking vessel (2100) having a lower temperature among the first cooking vessel (2100) and the second cooking vessel (2200) to 50 lux. However, the present invention is not limited thereto, and the induction heating device (1000) can set the first brightness of the third light emitting unit (1033) and the second brightness of the fourth light emitting unit (1034) to different brightness levels that can be distinguished by the user of the induction heating device (1000) according to the temperature of each of the plurality of cooking containers (2100, 2200). Accordingly, the user of the induction heating device (1000) can more easily identify the difference in temperature of each of the plurality of cooking containers (2100, 2200) placed on the induction heating device (1000).

[0169] Hereinafter, the structure of each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) for setting the brightness of each of the plurality of light-emitting units (1033, 1034) according to temperature will be described with reference to FIG. 13.

[0170] FIG. 13 is a drawing showing a first light-emitting element (1243_1) of an induction heating device (1000) according to one embodiment of the present disclosure. Since the configuration and function of each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) of the induction heating device (1000) are the same, the description related to the brightness of the light-emitting element according to the temperature of the first light-emitting element (1243_1) can be equally applied to the second to seventh light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7).

[0171] In one embodiment, the first light-emitting element (1243_1) may be connected to a variable resistor (1221). The variable resistor (1221) may be a device and / or a resistance circuit whose resistance value can be changed. The resistance value of the variable resistor (1221) may be changed by a control signal. The amount of current flowing to the first light-emitting element (1243_1) may be set based on the resistance value of the variable resistor (1221).

[0172] In one embodiment, the temperature sensor (1220) may be electrically connected to the variable resistor (1221). The temperature sensor (1220) may supply a control signal to the variable resistor (1221). The temperature sensor (1220) may change the resistance value of the variable resistor (1221). The temperature sensor (1220) may set the amount of current flowing to the first light-emitting element (1243_1) based on the change in the resistance value of the variable resistor (1221). In FIG. 13, it is assumed that the temperature sensor (1220) is connected to the variable resistor (1221) to control the current flowing to the first light-emitting element (1243_1). However, the present invention is not limited thereto, and the induction heating device (1000) may also control the current flowing to the first light-emitting element (1243_1) based on data related to the output of the induction heating device (1000) (e.g., an output value of the heating coil (1120)).

[0173] In one embodiment, the temperature sensor (1220) can measure the temperature of each of the plurality of cooking vessels (2100, 2200) placed on the induction heating device (1000). The temperature sensor (1220) can supply a control signal to the variable resistor (1221) based on the measured temperature of each of the plurality of cooking vessels (2100, 2200). The temperature sensor (1220) can set the resistance value of the variable resistor (1221) based on the measured temperature of each of the plurality of cooking vessels (2100, 2200). The temperature sensor (1220) can set the magnitude of the current flowing to the first light emitting element (1243_1) based on the measured temperature of each of the plurality of cooking vessels (2100, 2200). Accordingly, the temperature sensor (1220) can set the brightness of each of the plurality of light-emitting units (1033, 1034) based on the temperature of each of the measured plurality of cooking containers (2100, 2200).

[0174] Hereinafter, a case in which a cooking vessel (2000) placed on an induction heating device (1000) is an IH vessel or an IH cooking vessel will be described with reference to FIG. 14.

[0175] FIG. 14 is a drawing showing a cooking vessel (2000) placed on an induction heating device (1000) according to one embodiment of the present disclosure.

[0176] A cooking vessel (2000) according to one embodiment may be a cooking vessel (general IH vessel) comprising a magnetic material (e.g., IH metal). For example, the cooking vessel (2000) may be a pot comprising IH metal.

[0177] A cooking vessel (2000) according to an embodiment may be a container of various shapes including a magnetic material. The cooking vessel (2000) may be inductively heated by an induction heating device (1000). The cooking vessel (2000) may be heated by an induction heating method that heats an IH metal using an electromagnetic induction phenomenon. For example, when an alternating current is supplied to a heating coil (1120) of an induction heating device (1000), a magnetic field that varies over time may be induced inside the heating coil (1120). The magnetic field generated by the heating coil (1120) may pass through the bottom surface of the cooking vessel (2000). When the magnetic field that varies over time passes through an IH metal (e.g., iron, steel, nickel, or various types of alloys) included in the bottom surface of the cooking vessel (2000), a current that rotates around the magnetic field may be generated in the IH metal. The current generated in the bottom surface of the cooking vessel (2000) may be referred to as an eddy current. The phenomenon in which a current is induced by a temporally varying magnetic field in the IH metal of the cooking vessel (2000) can be referred to as an electromagnetic induction phenomenon. Heat can be generated at the bottom of the cooking vessel (2000) due to eddy current and the resistance of the IH metal (e.g., iron). The contents of the cooking vessel (2000) can be heated due to the heat generated at the bottom of the cooking vessel (2000). Since the cooking vessel (2000) includes the IH metal, it can be detected in the IH vessel detection mode (fan detection mode) of the induction heating device (1000).

[0178] According to one embodiment of the present disclosure, an induction heating device and a control method thereof can be provided for indicating the edge of a cooking vessel placed on the induction heating device having an arbitrary cooking area using a circuit structure independent of a processor.

[0179] An induction heating device (1000) according to one embodiment of the present disclosure comprises a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) arranged at the bottom of a cooking area of ​​the induction heating device (1000), a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) electrically connected to the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), and a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, The induction heating device (1000) may include a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) electrically connected to each other, and a processor (1600) that controls the cooking operation of the induction heating device (1000). At least one of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) according to one embodiment of the present disclosure may independently detect a cooking vessel (2000) that is placed in a cooking area and is heated based on a cooking operation from the processor (1600). At least one sensing coil according to one embodiment of the present disclosure can generate a plurality of sensing signals based on the result of sensing the cooking vessel (2000) independently of the processor (1600). At least one sensing coil according to one embodiment of the present disclosure can provide a plurality of output signals based on the plurality of sensing signals to a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) independently of the processor (1600).According to one embodiment of the present disclosure, a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) can operate at least some of a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) based on a plurality of output signals.

[0180] An induction heating device (1000) according to one embodiment of the present disclosure may include a signal collection circuit (1241) electrically connected to a plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238). The signal collection circuit (1241) according to one embodiment of the present disclosure may receive a plurality of detection signals from the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) independently of a processor (1600). A signal collection circuit (1241) according to one embodiment of the present disclosure can provide a plurality of output signals to each of a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) based on a plurality of detection signals.

[0181] An induction heating device (1000) according to one embodiment of the present disclosure may include at least one sub-circuit board (1201, 1202) having a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) arranged thereon.

[0182] An induction heating device (1000) according to one embodiment of the present disclosure may include a unit circuit board (1011) including at least one sub-circuit board (1201, 1202). A signal collection circuit (1241) according to one embodiment of the present disclosure may be placed on the unit circuit board (1011) so as to be spaced apart from at least one sub-circuit board (1201, 1202).

[0183] Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) according to one embodiment of the present disclosure may be an exclusive OR (XOR) gate.

[0184] A signal collection circuit (1241) according to one embodiment of the present disclosure may be a chip that receives a plurality of detection signals as inputs and outputs a plurality of output signals.

[0185] At least one sub-circuit board (1201, 1202) according to one embodiment of the present disclosure may include a first sub-circuit board (1201) and a second sub-circuit board (1202). A plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) according to one embodiment of the present disclosure may include a first sensing coil group (1230_1) included in the first sub-circuit board (1201) and a second sensing coil group (1230_2) included in the second sub-circuit board (1202). The first sensing coil group (1230_1) according to one embodiment of the present disclosure may transmit a first sensing signal to a fourth sensing signal among a plurality of sensing signals to a signal collection circuit (1241). A second detection coil group (1230_2) according to one embodiment of the present disclosure can transmit a fifth detection signal to an eighth detection signal among a plurality of detection signals to a signal collection circuit (1241).

[0186] A signal collection circuit (1241) according to one embodiment of the present disclosure can set the level of a first output signal among a plurality of output signals based on the first to fourth detection signals. A signal collection circuit (1241) according to one embodiment of the present disclosure can set the level of a second output signal among a plurality of output signals based on the fifth to eighth detection signals.

[0187] A signal collection circuit (1241) according to one embodiment of the present disclosure can set a first output signal to a high level when at least one of the first to fourth detection signals is at a high level. A signal collection circuit (1241) according to one embodiment of the present disclosure can set a second output signal to a high level when at least one of the fifth to eighth detection signals is at a high level.

[0188] Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) according to one embodiment of the present disclosure can receive two output signals from among the plurality of output signals. Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) according to one embodiment of the present disclosure can set the level of the light-emitting signal transmitted to each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) based on the two output signals received.

[0189] Each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) according to one embodiment of the present disclosure can set the light emission signal to a high level when the levels of each of the two output signals received are different from each other.

[0190] A cooking area according to one embodiment of the present disclosure may include a plurality of cooking vessels (2100, 2200). The colors of each of the plurality of light-emitting units (1033, 1034) corresponding to each of the plurality of cooking vessels (2100, 2200) according to one embodiment of the present disclosure may be set to different colors.

[0191] A cooking area according to one embodiment of the present disclosure may include a plurality of cooking vessels (2100, 2200). The brightness of each of the plurality of light-emitting units (1033, 1034) corresponding to each of the plurality of cooking vessels (2100, 2200) according to one embodiment of the present disclosure may be set to different brightnesses.

[0192] According to one embodiment of the present disclosure, the brightness of each of the plurality of light-emitting units (1033, 1034) can be set to different brightnesses based on the temperature of each of the plurality of cooking containers (2100, 2200).

[0193] A control method of an induction heating device (1000) according to one embodiment of the present disclosure may include an operation in which at least one of a plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) of the induction heating device (1000) detects a cooking vessel (2000) placed in a cooking area and heated based on a cooking operation, independently from a processor (1600) that controls the cooking operation of the induction heating device (1000) as a whole. A control method of an induction heating device (1000) according to one embodiment of the present disclosure may include an operation in which at least one detection coil generates a plurality of detection signals based on a result of detecting the cooking vessel (2000) independently from the processor (1600). A method for controlling an induction heating device (1000) according to one embodiment of the present disclosure may include an operation in which at least one sensing coil provides a plurality of output signals based on a plurality of sensing signals to a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of the induction heating device (1000) independently of a processor (1600). A control method of an induction heating device (1000) according to one embodiment of the present disclosure may include an operation in which a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) operate at least some of a plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) of the induction heating device (1000) based on a plurality of output signals.

[0194] An operation of providing a plurality of output signals according to one embodiment of the present disclosure may include an operation of the signal collection circuit (1241) of the induction heating device (1000) receiving a plurality of detection signals from each of the plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) independently from the processor (1600). An operation of providing a plurality of output signals according to one embodiment of the present disclosure may include an operation of the signal collection circuit (1241) providing a plurality of output signals to each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) based on the plurality of detection signals.

[0195] A unit circuit board (1011) of an induction heating device (1000) according to one embodiment of the present disclosure may include a first sub-circuit board (1201) and a second sub-circuit board (1202). A plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) according to one embodiment of the present disclosure may include a first sensing coil group (1230_1) included in the first sub-circuit board (1201) and a second sensing coil group (1230_2) included in the second sub-circuit board (1202). The first sensing coil group (1230_1) according to one embodiment of the present disclosure may transmit a first sensing signal to a fourth sensing signal among a plurality of sensing signals to a signal collection circuit (1241) of the induction heating device (1000). A second detection coil group (1230_2) according to one embodiment of the present disclosure can transmit a fifth detection signal to an eighth detection signal among a plurality of detection signals to a signal collection circuit (1241).

[0196] A signal collection circuit (1241) according to one embodiment of the present disclosure can set the level of a first output signal among a plurality of output signals based on the first to fourth detection signals. A signal collection circuit (1241) according to one embodiment of the present disclosure can set the level of a second output signal among a plurality of output signals based on the fifth to eighth detection signals.

[0197] A signal collection circuit (1241) according to one embodiment of the present disclosure can set a first output signal to a high level when at least one of the first to fourth detection signals is at a high level. A signal collection circuit (1241) according to one embodiment of the present disclosure can set a second output signal to a high level when at least one of the fifth to eighth detection signals is at a high level.

[0198] According to one embodiment of the present disclosure, the operation of causing the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) to operate at least some of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) may include an operation of receiving two output signals among the plurality of output signals. According to one embodiment of the present disclosure, the operation of causing the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) to operate at least some of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) may include an operation of setting the level of a light-emitting signal transmitted to each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) based on two received output signals.

[0199] According to one embodiment of the present disclosure, a wiring structure for connecting a processor and each of a plurality of light-emitting elements can be omitted, thereby reducing the number of pins used in the processor and simplifying the signal wiring structure of the induction heating device.

[0200] Additionally, according to one embodiment of the present disclosure, a light-emitting area in which a cooking vessel is placed can be visually displayed in an induction heating device having any cooking area.

[0201] A method according to an embodiment of the present disclosure may be implemented in the form of program commands that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program commands, data files, data structures, etc., alone or in combination. The program commands recorded on the medium may be those specially designed and configured for the present disclosure or may be those known and available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specially configured to store and execute program commands, such as ROMs, RAMs, and flash memories. Examples of program commands include not only machine language codes generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc.

[0202] Some embodiments of the present disclosure may also be implemented in the form of a recording medium containing computer-executable instructions, such as program modules, executed by a computer. Computer-readable media may be any available media that can be accessed by a computer, and include both volatile and nonvolatile media, removable and non-removable media. Furthermore, computer-readable media may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information, such as computer-readable instructions, data structures, program modules, or other data. Communication media typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave, or other transport mechanism, and includes any information delivery media. Furthermore, some embodiments of the present disclosure may also be implemented as a computer program or computer program product containing computer-executable instructions, such as a computer program that is executed by a computer.

[0203] A device-readable storage 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.

[0204] 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 storage medium (e.g., compact disc read-only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) through an application 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 in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

Claims

1. In the induction heating device (1000), A plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) arranged at the bottom of the cooking area of ​​the above induction heating device (1000); A plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) electrically connected to the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238); A plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) electrically connected to each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7); and It includes a processor (1600) that controls the overall cooking operation of the above induction heating device (1000), At least one of the above sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) is Independently detecting a cooking vessel (2000) placed in the above cooking area and heated based on the above cooking operation from the processor (1600), Generate multiple detection signals based on the result of detecting the cooking vessel (2000) independently from the processor (1600), Independently from the above processor (1600), a plurality of output signals based on the plurality of detection signals are provided to the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7), The above plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) are An induction heating device (1000) that operates at least some of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) based on the plurality of output signals.

2. In paragraph 1, It further includes a signal collection circuit (1241) electrically connected to the above plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), The above signal collection circuit (1241) Independently from the above processor (1600), the above plurality of detection signals are received from the above plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238), An induction heating device (1000) that provides the plurality of output signals to each of the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) based on the plurality of detection signals.

3. In at least one of paragraphs 1 and 2, An induction heating device (1000) further comprising at least one sub-circuit board (1201, 1202) on which the plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) are arranged.

4. In paragraph 3, Further comprising a unit circuit board (1011) including at least one sub-circuit board (1201, 1202), The signal collection circuit (1241) is disposed on the unit circuit board (1011) so as to be spaced apart from the at least one sub-circuit board (1201, 1202), induction heating device (1000).

5. In at least one of clauses 3 to 4, An induction heating device (1000), wherein each of the above plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) is an exclusive OR (XOR) gate.

6. In at least one of clauses 3 to 5, The above signal collection circuit (1241) An induction heating device (1000) which is a chip that receives the above plurality of detection signals as inputs and outputs the above plurality of output signals.

7. In at least one of clauses 3 to 6, The above at least one sub-circuit board (1201, 1202) includes a first sub-circuit board (1201) and a second sub-circuit board (1202), The above plurality of detection coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) include a first detection coil group (1230_1) included in the first sub-circuit board (1201) and a second detection coil group (1230_2) included in the second sub-circuit board (1202), The above first detection coil group (1230_1) transmits the first detection signal to the fourth detection signal among the plurality of detection signals to the signal collection circuit (1241), An induction heating device (1000) in which the second detection coil group (1230_2) transmits the fifth detection signal to the eighth detection signal among the plurality of detection signals to the signal collection circuit (1241).

8. In paragraph 7, The above signal collection circuit (1241) Setting the level of the first output signal among the plurality of output signals based on the first to fourth detection signals, An induction heating device (1000) that sets the level of a second output signal among the plurality of output signals based on the fifth to eighth detection signals.

9. In paragraph 8, The above signal collection circuit (1241) If at least one of the first to fourth detection signals is at a high level, the first output signal is set to a high level, An induction heating device (1000) that sets the second output signal to a high level when at least one of the fifth to eighth detection signals is at a high level.

10. In at least one of clauses 1 to 9, Each of the above multiple logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) Receive two output signals among the above multiple output signals, An induction heating device (1000) that sets the level of a light-emitting signal transmitted to each of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) based on the two output signals received above.

11. In Article 10, Each of the above multiple logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) An induction heating device (1000) that sets the light-emitting signal to a high level when the levels of each of the two received output signals are different from each other.

12. In at least one of clauses 1 to 11, In the above cooking area, a plurality of cooking containers (2100, 2200) are placed, An induction heating device (1000) that sets the color of each of a plurality of light-emitting parts (1033, 1034) corresponding to each of the plurality of cooking containers (2100, 2200) to a different color.

13. In at least one of paragraphs 1 to 11, In the above cooking area, a plurality of cooking containers (2100, 2200) are placed, An induction heating device (1000) that sets the brightness of each of a plurality of light-emitting units (1033, 1034) corresponding to each of the plurality of cooking containers (2100, 2200) to a different brightness.

14. In paragraph 13, An induction heating device (1000) that sets the brightness of each of the plurality of light-emitting units (1033, 1034) to a different brightness based on the temperature of each of the plurality of cooking containers (2100, 2200).

15. In a control method of an induction heating device (1000), An operation of detecting a cooking vessel (2000) that is heated based on a cooking operation by at least one of a plurality of sensing coils (1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238) of the induction heating device (1000) independently from a processor (1600) that controls the cooking operation of the induction heating device (1000) as a whole; An operation of generating a plurality of detection signals based on the result of the at least one detection coil detecting the cooking vessel (2000) independently from the processor (1600); An operation of providing a plurality of output signals based on the plurality of detection signals to a plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) of the induction heating device (1000) independently of the processor (1600) by the at least one detection coil; and A method comprising: an operation of causing the plurality of logic elements (1242_1, 1242_2, 1242_3, 1242_4, 1242_5, 1242_6, 1242_7) to operate at least some of the plurality of light-emitting elements (1243_1, 1243_2, 1243_3, 1243_4, 1243_5, 1243_6, 1243_7) of the induction heating device (1000) based on the plurality of output signals.

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