Household appliance for detecting empty heating and power transmission device

Abstract

A wireless power transfer device for determining empty heating according to an embodiment disclosed herein is provided. The wireless power transmission apparatus includes: a wireless power transmitter including a transmission coil for transmitting wireless power and an inverter circuit driving the transmission coil; at least one processor for controlling the inverter circuit; and the communication interface is used for communicating with the cooking utensil. The communication interface receives, from the cooking appliance, a temperature of a bottom surface of the cooking appliance and a temperature of an interior of the cooking appliance for a first prescribed period during which a heating operation is performed via the transmission coil and for a second prescribed period after the first prescribed period, the second prescribed period during which the heating operation is performed via the transmission coil. The heating operation via the transmission coil is stopped, and the at least one processor controls the inverter circuit to stop the heating operation performed via the transmission coil after a first prescribed period, and determining that the cooking appliance is empty-heated based on a relationship between the temperature of the bottom surface of the cooking appliance and the temperature of the interior of the cooking appliance during the second prescribed period.

Description

Technical Field

[0001] The present disclosure relates to a method for detecting empty heating that occurs when a wireless power transmission device heats a cooking appliance without placing an object to be cooked in the cooking appliance, and a wireless power transmission device using the method. More specifically, the present disclosure relates to a method for detecting empty heating when there is no object to be cooked in the cooking appliance, which is performed by a cooking appliance, and a cooking appliance using the method. Background Art

[0002] An induction stove, which is a wireless power transmission device, is a heating device that uses the principle of induction heating for cooking, and is also generally referred to as an induction device. Unlike a gas stove, an induction stove does not consume oxygen and does not emit exhaust gas, which can reduce indoor air pollution and indoor temperature. In addition, an induction stove uses an indirect method of inducing heat into an object to be heated, has high energy efficiency and high stability, and has a lower risk of scalding because heat is directly generated in the target without heating the contact surface, and due to these advantages, the demand for induction stoves has been increasing in recent years.

[0003] However, when cooking using an induction stove, since the cooking utensil is heated via wireless power transmission, it may not be easy for a user to visually determine whether the cooking utensil is being heated compared to cooking using a gas stove. Therefore, the induction stove may heat the cooking utensil in vain without placing an object to be cooked therein, which may cause damage to a heater included in the cooking utensil.

[0004] Therefore, when the induction cooktop is used, it is necessary to control the induction cooktop to prevent the empty heating by recognizing whether the cooking appliance undergoes empty heating.

[0005] In addition, when empty heating occurs in a cooking appliance that is heated via an electric wire instead of via a wireless power transmission device, it is necessary to control the cooking appliance by identifying the empty heating to prevent overheating due to the empty heating. Summary of the invention

[0006]

Technical solution

[0007] According to one aspect of the present disclosure, a wireless power transmission device for detecting empty heating is provided. The wireless power transmission device includes: a wireless power transmitter including a transmission coil and an inverter circuit, the transmission coil is configured to wirelessly transmit power, and the inverter circuit is configured to drive the transmission coil; at least one processor is configured to control the inverter circuit; and a communication interface is configured to communicate with a cooking appliance, wherein the communication interface is also configured to receive the temperature of the bottom surface of the cooking appliance and the internal temperature of the cooking appliance in a first time period and a second time period after the first time period from the cooking appliance, perform a heating operation via the transmission coil during the first time period, and stop the heating operation via the transmission coil during the second time period, and the at least one processor is also configured to: control the inverter circuit to stop the heating operation via the transmission coil in the second time period; and determine whether the cooking appliance undergoes empty heating based on the relationship between the temperature of the bottom surface and the internal temperature of the cooking appliance in the second time period.

[0008] According to one aspect of the present disclosure, a method for detecting empty heating in a wireless power transmission device is provided. The method includes: heating a cooking appliance via a transmission coil in a first time period; after the first time period has passed, stopping heating the cooking appliance via the transmission coil; obtaining the temperature of the bottom surface of the cooking appliance and the internal temperature of the cooking appliance in the first time period and the second time period, and stopping heating via the transmission coil during the second time period; and determining whether the cooking appliance has undergone empty heating based on the relationship between the temperature of the bottom surface and the internal temperature of the cooking appliance in the second time period.

[0009] According to one aspect of the present disclosure, a cooking appliance for detecting empty heating is provided. The cooking appliance includes: a first temperature sensor configured to detect the internal temperature of the cooking appliance; a second temperature sensor configured to detect the temperature of the bottom surface of the cooking appliance; a communication interface configured to communicate with a power transmission device; and at least one processor, wherein the at least one processor is configured to: obtain the internal temperature of the cooking appliance measured by the first temperature sensor and the temperature of the bottom surface of the cooking appliance measured by the second temperature sensor in a second time period, the second time period being after the first time period in which the heating operation is performed has passed, and the heating operation is stopped during the second time period; and when the value obtained by subtracting the internal temperature of the cooking appliance from the temperature of the bottom surface in the second time period increases, it is determined that the cooking appliance has undergone empty heating, and the communication interface is configured to: when it is determined that the cooking appliance has undergone empty heating, send a notification indicating that the cooking appliance has undergone empty heating to the power transmission device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and other aspects, features and advantages of some embodiments of the present disclosure will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0011] Figure 1 is a diagram showing a cooking system according to an embodiment of the present disclosure;

[0012] Figure 2 is a diagram showing types of cooking appliances according to an embodiment of the present disclosure;

[0013] Figure 3 is a diagram showing types of cooking appliances according to an embodiment of the present disclosure;

[0014] Figure 4 is a diagram showing a coil arrangement in a cooking appliance according to an embodiment of the present disclosure;

[0015] Figure 5a is a diagram showing a load structure in a cooking appliance according to an embodiment of the present disclosure;

[0016] Figure 5b is a block diagram illustrating a path through which power is transmitted from a cooking appliance to a heater according to an embodiment of the present disclosure;

[0017] Figure 6a is a block diagram showing the functions of a heating device according to an embodiment of the present disclosure;

[0018] Figure 6b is a block diagram showing the functions of a heating device according to an embodiment of the present disclosure;

[0019] Figure 7a is a block diagram showing the functions of a heating device according to an embodiment of the present disclosure;

[0020] Figure 7b is a block diagram illustrating a wired cooking appliance according to an embodiment of the present disclosure;

[0021] Figure 8 is a diagram showing a wireless power transmitter of a heating device according to an embodiment of the present disclosure;

[0022] Figure 9a is a waveform diagram showing a power transmission pattern output from a heating device for determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure;

[0023] Figure 9b is a diagram showing a power pattern output from a heating device for determining idle heating according to an embodiment of the present disclosure;

[0024] Fig.10 is a temperature variation curve diagram for determining air heating according to an embodiment of the present disclosure;

[0025] Fig.11is a graph of temperature versus water volume according to an embodiment of the present disclosure;

[0026] Fig.12 is a graph for determining empty heating when reheating a heating device according to an embodiment of the present disclosure;

[0027] Fig.13a shows the location of a first temperature sensor for detecting the temperature of an object being cooked according to an embodiment of the present disclosure;

[0028] Fig.13b shows the location of a first temperature sensor for detecting the temperature of an object being cooked according to an embodiment of the present disclosure;

[0029] Fig.13c The structure of a cooking appliance according to an embodiment of the present disclosure is shown;

[0030] Fig.13d A coffee drip filter according to an embodiment of the present disclosure is shown;

[0031] Fig.14 is a flow chart of a method for identifying a position of a cooking appliance performed by a heating device according to an embodiment of the present disclosure;

[0032] Fig.15 is a diagram showing a power transmission mode according to an embodiment of the present disclosure;

[0033] Fig.16 is a diagram showing a power transmission mode according to an embodiment of the present disclosure;

[0034] Fig.17a is a flowchart of a method for determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure;

[0035] Fig.17b is a flowchart of a method for determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure;

[0036] Fig.17c is a flowchart of a method for determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure;

[0037] Fig.17d is a flowchart of a method for determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure;

[0038] Fig.17e is a flowchart of a method for determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure;

[0039] Fig.18is a flow chart of a method for identifying a position of a cooking appliance performed by a heating device according to an embodiment of the present disclosure;

[0040] Fig.19 is a diagram illustrating the operation of a heating device when a cooking appliance (small electric appliance) is placed on the heating device according to an embodiment of the present disclosure;

[0041] Fig. 20 is a flowchart of a method for providing a graphical user interface (GUI) according to identification information about a cooking appliance, performed by a heating device according to an embodiment of the present disclosure;

[0042] Fig.21 is a diagram illustrating an operation of providing a GUI according to identification information about a cooking appliance and whether the cooking appliance undergoes empty heating according to an embodiment of the present disclosure;

[0043] Fig. 22 is a flow chart of a method for determining a position of a cooking appliance performed by a heating device according to an embodiment of the present disclosure;

[0044] Fig.23 is a flowchart of a method for identifying a location of a cooking appliance by using a near field communication (NFC) tag included in the cooking appliance, performed by a heating device according to an embodiment of the present disclosure;

[0045] Fig.24 is a diagram illustrating an operation of a heating device according to an embodiment of the present disclosure to recognize a location of a cooking appliance by using an NFC tag embedded in the cooking appliance;

[0046] Fig.25 is a flowchart illustrating operations between a heating device and a cooking appliance when it is determined that the cooking appliance undergoes empty heating according to an embodiment of the present disclosure;

[0047] Fig.26 is a flowchart of a method for determining empty heating when reheating a cooking appliance, performed by a heating device according to an embodiment of the present disclosure;

[0048] Fig. 27 is a diagram showing an operation of a heating device interacting with a server device and a display apparatus according to an embodiment of the present disclosure;

[0049] Fig.28 is a diagram illustrating an operation of providing information on a heating device via a display device according to an embodiment of the present disclosure;

[0050] Fig.29 is a diagram illustrating an operation of providing a screen for setting a sequence of a detection operation and idle heating via a display device according to an embodiment of the present disclosure; and

[0051] Fig.30 is a diagram illustrating an operation of notifying that idle heating is occurring via a display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. The following description includes various specific details to assist in understanding, but these specific details should be considered as merely exemplary. Therefore, it will be appreciated by those of ordinary skill in the art that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, for the sake of clarity and brevity, descriptions of known functions and structures may be omitted.

[0053] The terms and words used in the following description and claims are not limited to the literal meanings, but are merely used by the inventor to achieve a clear and consistent understanding of the present disclosure. Therefore, it should be clear to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustrative purposes only, and not for the purpose of limiting the present disclosure as defined by the attached claims and their equivalents.

[0054] It should be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0055] Throughout the specification, when a component "includes" or "comprising" an element, unless there is a specific description to the contrary, it should be understood that the component may also include other elements, rather than excluding other elements. In addition, terms such as "part", "module", etc. used herein indicate a unit for processing at least one function or operation, and may be embodied as hardware or software or a combination of hardware and software.

[0056] Embodiments of the present disclosure will now be described more fully below with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the embodiments. However, the embodiments of the present disclosure may be implemented in different forms and should not be construed as being limited to the embodiments described herein. In addition, in order to clearly illustrate the embodiments of the present disclosure, parts that are not related to the description of the present disclosure are omitted in the accompanying drawings, and similar reference numerals represent similar elements throughout the present disclosure.

[0057] According to an embodiment of the present disclosure, a method of preventing a cooking appliance from overheating by identifying a state in which the cooking appliance undergoes idle heating and a wireless power transmission device using the method may be provided.

[0058] According to an embodiment of the present disclosure, a method of preventing empty heating according to the type of cooking appliances placed on a top plate of the wireless power transmission device and a wireless power transmission device may be provided.

[0059] According to an embodiment of the present disclosure, a wireless power transmission device for determining whether a cooking appliance undergoes no-heating includes: a wireless power transmitter including a transmission coil and an inverter circuit, the transmission coil being configured to transmit wireless power, and the inverter circuit being configured to drive the transmission coil; at least one processor being configured to control the inverter circuit; and a communication interface being configured to communicate with the cooking appliance, wherein the communication interface is configured to receive from the cooking appliance a temperature of a bottom surface of the cooking appliance and an internal temperature of the cooking appliance in a first time period and a second time period, a heating operation is performed via the transmission coil during the first time period, and the second time period is after the first time period, and the heating operation via the transmission coil is stopped during the second time period, and the at least one processor is configured to: control the inverter circuit to stop the heating operation via the transmission coil in the second time period; and determine whether the cooking appliance undergoes no-heating based on the relationship between the temperature of the bottom surface and the internal temperature of the cooking appliance in the second time period.

[0060] In an embodiment of the present disclosure, the at least one processor may be further configured to determine that the cooking appliance undergoes empty heating when a value obtained by subtracting the internal temperature of the cooking appliance from the temperature of the bottom surface increases within the second time period.

[0061] In an embodiment of the present disclosure, the at least one processor may be further configured to determine that the cooking appliance is not subjected to empty heating when a value obtained by subtracting the internal temperature of the cooking appliance from the temperature of the bottom surface decreases within the second time period.

[0062] In an embodiment of the present disclosure, the at least one processor may be further configured to determine that the cooking appliance undergoes empty heating when a slope corresponding to a value obtained by subtracting the internal temperature of the cooking appliance from the temperature of the bottom surface has a positive value within the second time period.

[0063] In an embodiment of the present disclosure, at least one processor may further be configured to determine that the cooking utensil has not undergone idle heating when a slope corresponding to a value obtained by subtracting the internal temperature of the cooking utensil from the temperature of the bottom surface is greater than a specific value within a second time period.

[0064] In an embodiment of the present disclosure, the length of the first time period is less than 10 seconds, and the length of the second time period is less than 5 seconds.

[0065] In an embodiment of the present disclosure, the at least one processor may be further configured to determine that the cooking appliance undergoes empty heating when the temperature of the bottom surface of the cooking appliance increases within the second time period.

[0066] In an embodiment of the present disclosure, the at least one processor may be further configured to control the inverter circuit to heat the cooking appliance with a specific power for determining idle heating instead of power corresponding to a user input during the first time period.

[0067] In an embodiment of the present disclosure, the communication interface may be further configured to receive identification information about the cooking appliance from the cooking appliance, and the at least one processor may be further configured to change the magnitude of the specific power based on the identification information about the cooking appliance.

[0068] In an embodiment of the present disclosure, the at least one processor may be further configured to: when it is determined that the cooking appliance does not undergo idle heating, control the inverter circuit to output power corresponding to the user input after the second time period.

[0069] In an embodiment of the present disclosure, the at least one processor may be further configured to control the inverter circuit to transmit power for communication to the cooking appliance based on a heating start input by a user.

[0070] In an embodiment of the present disclosure, the at least one processor may be further configured to: when it is determined that the cooking appliance undergoes the empty heating, notify the cooking appliance via the communication interface that the cooking appliance undergoes the empty heating.

[0071] In an embodiment of the present disclosure, the communication interface can also be configured to: receive the temperature of the bottom surface of the cooking utensil having the object being cooked therein and the internal temperature of the cooking utensil within a third time period, and when a heating operation is performed on the cooking utensil via the transmission coil after the second time period, the heating operation via the transmission coil is stopped by at least one processor during the third time period, and wherein the at least one processor can also be configured to: determine whether the cooking utensil undergoes empty heating based on the relationship between the temperature of the bottom surface and the internal temperature of the cooking utensil within the third time period.

[0072] In an embodiment of the present disclosure, at least one processor may be further configured to further determine whether the cooking appliance undergoes air heating based on a change in the temperature of the bottom surface within a third time period and a relationship between the temperature of the bottom surface and an internal temperature of the cooking appliance.

[0073] In an embodiment of the present disclosure, at least one processor may further be configured to determine that the cooking utensil undergoes empty heating when the temperature of the bottom surface of the cooking utensil increases and the value obtained by subtracting the internal temperature of the cooking utensil from the temperature of the bottom surface increases within a third time period.

[0074] In an embodiment of the present disclosure, the wireless power transmission device may further include: an output interface; and multiple cooking zones, wherein at least one processor may further be configured to: transmit specific power to the multiple cooking zones by controlling the inverter circuit, and identify at least one cooking zone where the cooking appliance is located from the multiple cooking zones according to changes in the load; and when it is determined that the cooking appliance has experienced empty heating based on a determination as to whether the cooking appliance has experienced empty heating, control the output interface to output the identified at least one cooking zone and whether the cooking appliance has experienced empty heating.

[0075] In an embodiment of the present disclosure, the first temperature sensor may be configured to measure a temperature of a heater of the cooking appliance, and the temperature of the bottom surface may be the temperature of the heater of the cooking appliance.

[0076] According to an embodiment of the present disclosure, a method for preventing empty heating in a wireless power transmission device includes: heating a cooking appliance via a transmission coil within a first time period; stopping heating the cooking appliance via the transmission coil after the first time period has passed; obtaining the temperature of the bottom surface of the cooking appliance and the internal temperature of the cooking appliance within the first time period and a second time period, and stopping heating via the transmission coil during the second time period; and determining whether the cooking appliance has undergone empty heating based on the relationship between the temperature of the bottom surface of the cooking appliance and the internal temperature of the cooking appliance.

[0077] According to an embodiment of the present disclosure, determining whether a cooking utensil has undergone empty heating based on the relationship between the temperature of the bottom surface and the internal temperature of the cooking utensil may include: when a value obtained by subtracting the internal temperature of the cooking utensil from the temperature of the bottom surface increases within a second time period, determining that the cooking utensil has undergone empty heating.

[0078] According to an embodiment of the present disclosure, a cooking appliance for determining empty heating includes: a first temperature sensor configured to detect an internal temperature of the cooking appliance; a second temperature sensor configured to detect a temperature of a bottom surface of the cooking appliance;

[0079] A communication interface configured to communicate with a wireless power transmission device; and at least one processor, wherein the at least one processor can be configured to: obtain an internal temperature of a cooking appliance detected by a first temperature sensor and a temperature of a bottom surface of the cooking appliance detected by a second temperature sensor within a second time period, the second time period being after a first time period in which a heating operation is performed, and stop the heating operation during the second time period; and determine that the cooking appliance undergoes idle heating when a value obtained by subtracting the internal temperature of the cooking appliance from the temperature of the bottom surface within the second time period increases, and the communication interface can be configured to: when it is determined that the cooking appliance undergoes idle heating, send a notification to the wireless power transmission device indicating that the cooking appliance undergoes idle heating.

[0080] In an embodiment of the present disclosure, the cooking appliance may further include a fuse configured to stop heating the cooking appliance, and the at least one processor may further be configured to control a relay or a thermal fuse to stop heating the cooking appliance based on determining that the cooking appliance undergoes no heating.

[0081] According to an embodiment of the present disclosure, a computer-readable storage medium may store commands for executing a method for preventing empty heating in a wireless power transmission device as program codes, the method comprising: heating a cooking appliance via a transmission coil within a first time period; stopping heating the cooking appliance via the transmission coil after the first time period has passed; obtaining the temperature of the bottom surface of the cooking appliance and the internal temperature of the cooking appliance within the first time period and a second time period, and stopping heating via the transmission coil during the second time period; and detecting whether the cooking appliance has undergone empty heating based on the relationship between the temperature of the bottom surface and the internal temperature of the cooking appliance.

[0082] Figure 1 is a diagram illustrating a cooking system according to an embodiment of the present disclosure.

[0083] refer to Figure 1 , the cooking system 100 according to an embodiment of the present disclosure may include a cooking appliance 1000 and a heating device 2000. Hereinafter, the heating device 2000 may also be referred to as a wireless power transmission device or station. In an embodiment of the present disclosure, the heating device 2000 may include not only a device for wirelessly transmitting power to the cooking appliance 1000, but also a device for supplying power to the cooking appliance 1000 via an electric wire. Figure 1 Not all components shown are required. Cooking system 100 may be used with Figure 1 The components shown may be implemented with more or fewer components.

[0084] The cooking appliance 1000 may be a device for heating the contents (the object being cooked) inside the cooking appliance 1000. The contents in the cooking appliance 1000 may be liquid (such as water, tea, coffee, soup, juice, wine, oil, etc.) or solid (such as butter, meat, vegetables, bread, rice, etc.), but is not limited thereto.

[0085] According to an embodiment of the present disclosure, the cooking appliance 1000 may wirelessly receive power from the heating device 2000 by using electromagnetic induction. Therefore, according to an embodiment of the present disclosure, the cooking appliance 1000 may not include a power line connected to a power outlet. In an embodiment of the present disclosure, the cooking appliance 1000 may receive power from the heating device 2000 through a wire. Therefore, according to an embodiment of the present disclosure, the cooking appliance 1000 may include a power line connected to a power outlet.

[0086] According to an embodiment of the present disclosure, the cooking appliance 1000 that wirelessly receives power from the heating device 2000 may be of various types. The cooking appliance 1000 may be: a first type cooking appliance 1000a (see Figure 2 ), which is a general induction heating (IH) container including a magnetic material (hereinafter, referred to as an IH container); or a second type cooking utensil 1000b (see Figure 2 ), which includes a communication interface. Hereinafter, the second type cooking appliance 1000b including the communication interface may also be referred to as a small appliance. In addition, the second type cooking appliance 1000b may include: a 2-1 type cooking appliance 1000b-1, which receives power via a magnetic material (IH metal) (for example, an iron component); and a 2-2 type cooking appliance 1000b-2, which receives power via a receiving coil. In the case of the 2-1 type cooking appliance 1000b-1, a magnetic field can be induced in the container (IH metal) itself, and for the 2-2 type cooking appliance 1000b-2, a magnetic field can be induced in the receiving coil. Reference will be made to Figure 2 and Figure 3 Describe the type of cooking appliance 1000.

[0087] The cooking utensil 1000 may be a cooking container (such as a pot, a frying pan, a steamer), or may be a small electrical appliance (such as an electric kettle, a teapot, a coffee machine (or a coffee dripper), a toaster, a blender, a rice cooker, an oven, etc.), but is not limited thereto. The cooking utensil 1000 may include a cooker device. The cooker device may be a device into which a commonly used IH container can be inserted or from which a commonly used IH container can be removed. According to an embodiment of the present disclosure, the cooker device may be a device that can automatically cook content according to a recipe. The cooker device may be referred to as a pot, a rice cooker, or a steamer according to its purpose. For example, when an inner pot for cooking rice is inserted into the cooker device, the cooker device may be referred to as a rice cooker. Hereinafter, the cooker device may be referred to as a smart pan (or smart pot).

[0088] According to an embodiment of the present disclosure, when the cooking appliance 1000 is a small electrical appliance including a communication interface, the cooking appliance 1000 can communicate with the heating device 2000. The communication interface may include a short-distance communication interface, a long-distance communication interface, and the like. The short-distance communication interface may include, but is not limited to, a Bluetooth communication interface, a Bluetooth low energy (BLE) communication interface, a near field communication (NFC) interface, a wireless local area network (WLAN) (or Wi-Fi) communication interface, a Zigbee communication interface, an infrared data association (IrDA) communication interface, a Wi-Fi direct connection (WFD) communication interface, an ultra-wideband (UWB) communication interface, an Ant+ communication interface, and the like. When the cooking appliance 1000 is remotely controlled by a server device in an Internet of Things (IoT) environment, a long-distance communication interface may be used to communicate with the server device (not shown). The long-distance communication interface may include the Internet, a computer network (e.g., a LAN or a wide area network (WAN)), and a mobile communication interface. The mobile communication interface may include but is not limited to a third generation (3G) module, a fourth generation (4G) module, a fifth generation (5G) module, a long term evolution (LTE) module, a narrowband IoT (NB-IoT) module, an LTE machine (LTE-M) module, etc.

[0089] According to an embodiment of the present disclosure, the cooking appliance 1000 may send identification information about the cooking appliance 1000 to the heating device 2000 via the communication interface. The identification information about the cooking appliance 1000 is unique information for identifying the cooking appliance 1000, and may include, but is not limited to, at least one of a media access control (MAC) address, a model name, appliance type information (e.g., an IH type identification (ID), a heater type ID, and a motor type ID), manufacturer information (e.g., a manufacturer ID), a serial number, or manufacturing time information (manufacturing date). According to an embodiment of the present disclosure, the identification information about the cooking appliance 1000 may be represented as a series of identification numbers, a series of identification symbols, a combination of numbers and letters, a barcode, a quick response (QR) code, a three-dimensional (3D) code, and the like.

[0090] Furthermore, according to an embodiment of the present disclosure, the cooking appliance 1000 may transmit position information of the cooking appliance 1000 to the heating device 2000 via the communication interface. The position information of the cooking appliance 1000 may include information about a cooking zone (also referred to as a heating zone) where the cooking appliance 1000 is located. In an embodiment of the present disclosure, regardless of the information transmitted by the cooking appliance 1000, the heating device 2000 may independently determine on which cooking zone among the plurality of cooking zones of the heating device 2000 the cooking appliance 1000 is located.

[0091] According to an embodiment of the present disclosure, the cooking appliance 1000 may transmit information to the server device via the heating device 2000. For example, the cooking appliance 1000 may transmit information obtained by the cooking appliance 1000 itself (e.g., temperature information of the bottom surface of the cooking appliance 1000 or a heater included in the cooking appliance 1000, temperature information of the contents in the cooking appliance 1000, etc.) to the heating device 2000 via short-range wireless communication (e.g., Bluetooth, BLE, etc.). In this case, the heating device 2000 may transmit the information obtained from the cooking appliance 1000 to the server device or the mobile device by accessing the server device or the mobile device via a WLAN (Wi-Fi) communication interface or a long-range communication interface (e.g., the Internet). In addition, the server device may receive the information obtained from the cooking appliance 1000 from the heating device 2000, and provide the information to the user via the mobile device connected to the server device. According to an embodiment of the present disclosure, the heating device 2000 may directly transmit information obtained from the cooking appliance 1000 to the user's mobile terminal via device-to-device (D2D) communication (eg, WFD communication or BLE communication).

[0092] Furthermore, according to an embodiment of the present disclosure, the cooking appliance 1000 may directly transmit information obtained by the cooking appliance 1000 itself (e.g., temperature information of the contents in the cooking appliance 1000, etc.) to the server device via a communication interface (e.g., a WLAN (Wi-Fi) communication interface). In addition, the cooking appliance 1000 may directly transmit information obtained by the cooking appliance 1000 itself (e.g., temperature information of the contents in the cooking appliance 1000, etc.) to the user's mobile device via short-range wireless communication (e.g., Bluetooth, BLE, etc.) or D2D communication (e.g., WFD communication).

[0093] According to an embodiment of the present disclosure, the heating device 2000 may be a device that wirelessly transmits power to an object to be heated (e.g., a cooking utensil 1000) placed on a top plate by using electromagnetic induction. The heating device 2000 may be represented as an induction stove or an electric stove. The heating device 2000 may include a working coil that generates a magnetic field for inductively heating the cooking utensil 1000. When the cooking utensil 1000 is a 2-2 type cooking utensil 1000b-2 including a receiving coil, the working coil may be referred to as a transmitting coil.

[0094] Wirelessly transmitting power may mean transmitting power by using a magnetic field induced in a receiving coil or an IH metal (e.g., an iron component) via magnetic induction. For example, the heating device 2000 may allow current to flow through a working coil (transmitting coil) to generate a magnetic field in the working coil, thereby generating an eddy current in the cooking appliance 1000 or inducing a magnetic field in the receiving coil.

[0095] According to an embodiment of the present disclosure, the heating device 2000 may include a plurality of working coils. For example, when the top plate of the heating device 2000 includes a plurality of cooking zones, the heating device 2000 may include a plurality of working coils corresponding to the plurality of cooking zones, respectively. In addition, the heating device 2000 may include a high-power cooking zone having a first working coil disposed on the inside and a second working coil disposed on the outside. The high-power cooking zone may include three or more working coils.

[0096] According to an embodiment of the present disclosure, the top plate of the heating device 2000 may be formed of tempered glass (such as ceramic glass) so as not to be easily damaged. In addition, a guide mark for guiding the cooking zone where the cooking utensil 1000 is to be located may be provided on the top plate of the heating device 2000.

[0097] According to an embodiment of the present disclosure, the heating device 2000 can detect that the cooking utensil 1000 (e.g., the first type cooking utensil 1000a and the 2-1 type cooking utensil 1000b-1) including the magnetic material is placed on the top plate. For example, the heating device 2000 can detect that the cooking utensil 1000 is located on the top plate of the heating device 2000 based on the change in the current value (inductance) of the working coil caused by the cooking utensil 1000 approaching the heating device 2000. Hereinafter, the mode in which the heating device 2000 senses the cooking utensil 1000 including the magnetic material (IH metal) is referred to as an "IH container detection mode".

[0098] According to an embodiment of the present disclosure, the heating device 2000 may include a communication interface for communicating with an external device. For example, the heating device 2000 may communicate with the cooking appliance 1000 and / or the server device via the communication interface. The communication interface may include a short-range communication interface (e.g., an NFC communication interface, a Bluetooth communication interface, a BLE communication interface, etc.), a long-range communication interface, etc.

[0099] According to an embodiment of the present disclosure, the heating device 2000 may detect the cooking appliance 1000 placed on the top plate via the communication interface. For example, the heating device 2000 may detect the cooking appliance 1000 by receiving a packet sent from the cooking appliance 1000 placed on the top plate via short-range wireless communication (e.g., BLE or Bluetooth). Since the second type cooking appliance 1000b including the communication interface may be referred to as a small appliance (small object), the mode in which the heating device 2000 detects the cooking appliance 1000 via the communication interface is hereinafter referred to as a "small appliance detection mode".

[0100] According to an embodiment of the present disclosure, the heating device 2000 may receive identification information about the cooking appliance 1000 from the cooking appliance 1000 by using short-range wireless communication (e.g., BLE communication or Bluetooth communication). In this case, the cooking appliance 1000 may be a second type cooking appliance 1000b (also referred to as a small appliance) including a communication interface. In addition, when the heating device 2000 determines empty heating for each cooking zone, the heating device 2000 may receive information about a second cooking zone detected by the cooking appliance 1000 where empty heating is occurring and identification information about the cooking appliance 1000. Here, the second cooking zone may be a cooking zone in which the cooking appliance 1000 is located among a plurality of cooking zones included in the heating device 2000. Reference Figure 1 , the second cooking zone may be a lower left cooking zone where the cooking appliance 1000 is placed.

[0101] According to an embodiment of the present disclosure, the heating device 2000 can be connected via a user interface ( Figure 6b 2500) displays information related to the cooking appliance 1000. For example, when the cooking appliance 1000 is detected, the heating device 2000 may display identification information about the cooking appliance 1000 and location information of the cooking appliance 1000 on a display included in the user interface 2500. Figure 1 When a user places a cooking utensil 1000 (e.g., a coffee drip filter) on the top plate of the heating device 2000, the heating device 2000 can provide the user with identification information (e.g., coffee drip filter) and position information (e.g., lower left cooking zone) of the cooking utensil 1000 by displaying a coffee drip filter icon at a position on the display corresponding to the lower left cooking zone.

[0102] According to an embodiment of the present disclosure, the heating device 2000 can be connected to the user interface 2500 through the output interface ( Figure 6b2510) provides a graphical user interface (GUI) corresponding to the identification information about the cooking appliance 1000. For example, when the cooking appliance 1000 is a coffee drip filter and the operation of the coffee drip filter is completed, the heating device 2000 may output the text "Coffee is ready. Have a good time!", as shown in the enlarged output interface 1101. In an embodiment of the present disclosure, when the cooking appliance 1000 undergoes empty heating, the heating device 2000 may display the text "There is no water in the coffee machine!" via the output interface 2510 of the cooking appliance 1000, as shown in the enlarged output interface 2103, notify the user of the same via audio output, or provide a simple sound alarm. In an embodiment of the present disclosure, when the cooking appliance 1000 undergoes empty heating, as shown in the enlarged output interface 2103, the heating device 2000 may display that the cooking appliance 1000 is experiencing empty heating by graphically displaying the cooking zone where empty heating is occurring via the output interface 2510. In addition, the heating device 2000 can notify the user in the following manner: by graphically distinguishing the cooking zone 103-1 where idle heating is occurring from other heating zones where idle heating is not occurring (for example, by displaying a circular icon corresponding to the cooking zone 103-1 in a flashing manner, or displaying the cooking zone 103-1 in a different color from other cooking zones to attract the user's attention), so that the user can immediately identify the heating zone where idle heating is occurring (i.e., the cooking zone 103-1).

[0103] According to an embodiment of the present disclosure, in the cooking system 100, even if the user only places the cooking utensil 1000 on the heating device 2000, the heating device 2000 can automatically identify the type and position of the cooking utensil 1000, and when the heating operation is started, the heating device 2000 can also determine that the cooking utensil 1000 undergoes empty heating and provide the user with the position and type of the cooking utensil 1000 and / or information indicating that the cooking utensil 1000 undergoes empty heating via an appropriate GUI, thereby improving user convenience. Figure 2 and Figure 3 Types of the cooking appliance 1000 according to an embodiment of the present disclosure are described.

[0104] Figure 2 is a diagram showing types of cooking appliances according to an embodiment of the present disclosure.

[0105] refer to Figure 2, the cooking appliance 1000 may include: a first type cooking appliance 1000a, which is a general IH container including a magnetic material (e.g., IH metal); and a second type cooking appliance 1000b, which is capable of communicating with the heating device 2000. The second type cooking appliance 1000b capable of communicating with the heating device 2000 may also be referred to as a small electrical appliance. According to an embodiment of the present disclosure, the second type cooking appliance 1000b may be classified into a 2-1 type cooking appliance 1000b-1 including an IH metal (e.g., an iron component) and a 2-2 type cooking appliance 1000b-2 including a receiving coil 1003. Each type of the cooking appliance 1000 is described.

[0106] The first type cooking utensil 1000a may be heated in an inductive manner by the heating device 2000 and may be various types of containers including magnetic materials. IH is a method of heating an IH metal using an electromagnetic induction phenomenon. For example, when an alternating current (AC) is supplied to a working coil (or a transmission coil) of the heating device 2000, a magnetic field that varies with time is induced in the working coil. The magnetic field generated by the working coil passes through the bottom surface of the first type cooking utensil 1000a. When the magnetic field that varies with time passes through the IH metal (e.g., iron, nickel steel, or various types of alloys) included in the bottom surface of the first type cooking utensil 1000a, a current that circulates around the magnetic field is generated in the IH metal. The circulating current is called an eddy current, and the phenomenon of inducing a current by a magnetic field that varies with time is called an electromagnetic induction phenomenon. When the cooking utensil 1000 is the first type cooking utensil 1000a, heat is generated in the bottom surface of the first type cooking utensil 1000a due to the resistance of the IH metal (e.g., iron) and the eddy current. The heat generated at this time can heat the contents of the first type cooking utensil 1000a.

[0107] The 2-1 type cooking appliance 1000b-1 may include a pickup coil 1001, a power supply 1010, a controller 1020, a communication interface 1030, and a sensor unit 1040. In this case, the power supply 1010, the controller 1020, and the communication interface 1030 may be mounted on a printed circuit board (PCB) 1005. The pickup coil 1001 may be a low-power coil that generates power for operating the PCB 1005. When power is supplied to the PCB 1005 through the pickup coil 1001, components mounted on the PCB 1005 may be activated. For example, when power is supplied to the PCB 1005 through the pickup coil 1001, the power supply 1010, the controller 1020, the communication interface 1030, and the sensor unit 1040 may be activated.

[0108] In an embodiment of the present disclosure, the sensor unit 1040 may include a first temperature sensor 1041 and a second temperature sensor 1042. The first temperature sensor 1041 may measure the internal temperature of the 2-1 type cooking utensil 1000b-1. When the object to be cooked is inside the 2-1 type cooking utensil 1000b-1, the first temperature sensor 1041 may measure the temperature of the object to be cooked. For example, when the 2-1 type cooking utensil 1000b-1 is a smart pot and the object to be cooked is water, the first temperature sensor 1041 may be a side temperature sensor for detecting the side temperature of the smart pot. The side temperature sensor of the smart pot may measure the temperature of the water (the internal temperature of the smart pot when there is no water in the smart pot), and send the measured water temperature to the heating device 2000 via the communication interface 1030. In an embodiment of the present disclosure, the side temperature sensor of the 2-1 type cooking utensil 1000b-1 (such as a smart pot) may be a sensor that penetrates the outside of the 2-1 type cooking utensil 1000b-1 and reaches the inside thereof to measure the internal temperature.

[0109] The second temperature sensor 1042 may be used to measure the temperature of the bottom surface of the 2-1 type cooking utensil 1000b-1. Although the second temperature sensor 1042 may be directly attached to the bottom surface of the 2-1 type cooking utensil 1000b-1 to measure the temperature of the bottom surface thereof, the second temperature sensor 1042 may also be attached to a side of the smart pot close to the bottom surface of the smart pot to prevent damage to the second temperature sensor 1042. The temperature of the bottom surface of the cooking utensil 1000b-1 measured by the second temperature sensor 1042 may be sent to the heating device 2000 via the communication interface 1030.

[0110] In an embodiment of the present disclosure, a temperature sensor for measuring the temperature of the bottom surface of a 2-1 type cooking utensil 1000b-1 (such as a smart pot) may be located on the top plate of the heating device 2000, rather than on the cooking utensil 1000b-1. In this case, the temperature sensor for measuring the temperature of the bottom surface of the 2-1 type cooking utensil 1000b-1 may be a component of the heating device 2000, rather than a component of the 2-1 type cooking utensil 1000b-1. When the temperature sensor for measuring the temperature of the bottom surface of the 2-1 type cooking utensil 1000b-1 is placed on the top plate of the heating device 2000, the heating device 2000 may directly obtain the temperature of the bottom surface of the 2-1 type cooking utensil 1000b-1 without relying on communication.

[0111] The 2-2 type cooking appliance 1000b-2 may include a pickup coil 1001, a receiving coil 1003, a power supply 1010, a controller 1020, a communication interface 1030, and a sensor unit 1040. In this case, the power supply 1010, the controller 1020, and the communication interface 1030 may be mounted on the PCB 1005. The pickup coil 1001 may be a low-power coil that generates power for operating the PCB 1005. When power is supplied to the PCB 1005 through the pickup coil 1001, components mounted on the PCB 1005 may be activated. For example, when power is supplied to the PCB 1005 through the pickup coil 1001, the power supply 1010, the controller 1020, and the communication interface 1030 may be activated. According to an embodiment of the present disclosure, when power is supplied to the PCB 1005 through the pickup coil 1001, in addition to the power supply 1010, the controller 1020, and the communication interface 1030, the sensor unit 1040 may also be activated.

[0112] In an embodiment of the present disclosure, the sensor unit 1040 may include a first temperature sensor 1041 and a second temperature sensor 1042. The first temperature sensor 1041 may measure the internal temperature of the 2-2 type cooking utensil 1000b-2. When the object to be cooked is inside the 2-2 type cooking utensil 1000b-2, the first temperature sensor 1041 may measure the temperature of the object to be cooked. For example, when the 2-2 type cooking utensil 1000b-2 is a coffee drip filter and the object to be cooked is water, the first temperature sensor 1041 may measure the temperature of the water (the internal temperature of the water heater in the coffee drip filter when there is no water in the coffee drip filter), and the measured water temperature (or the internal temperature of the water heater) may be sent to the heating device 2000 via the communication interface 1030. The second temperature sensor 1042 may be used to measure the temperature of a heater (not shown) included in the load 1004 of the 2-2 type cooking utensil 1000b-2. Although the second temperature sensor 1042 may be directly attached to the heater to measure the temperature of the heater, the second temperature sensor 1042 may be attached to a bracket integrally formed with the heater in order to prevent damage to the second temperature sensor 1042. The temperature of the bracket (or heater) measured by the second temperature sensor 1042 may be sent to the heating device 2000 via the communication interface 1030. Hereinafter, "measuring the temperature of the heater" may include indirectly measuring the temperature of the heater by "measuring the temperature of the bracket". Therefore, "the temperature of the bracket" may be understood as "the temperature of the heater".

[0113] In an embodiment of the present disclosure, the controller 1020 may include at least one processor (not shown) capable of controlling all operations of the cooking appliance 1000 .

[0114] Figure 3 is a diagram showing types of cooking appliances according to an embodiment of the present disclosure.

[0115] refer to Figure 3 , the second type cooking appliance 1000b may further include a communication coil 1002. The communication coil 1002 is a coil for performing short-range wireless communication with the heating device 2000. The power transmitted via the communication coil 1002 may be referred to as power for communication. For example, the communication coil 1002 may be an NFC antenna coil for NFC communication. Although Figure 3 It is shown that the number of turns in the communication coil 1002 is 1, but the number of turns in the communication coil 1002 is not limited thereto. The communication coil 1002 may have a plurality of turns. For example, the communication coil 1002 may be wound with 5 to 6 turns. The NFC circuit connected to the NFC antenna coil may receive power through the pickup coil 1001. In the following, the above components are described.

[0116] The power supply 1010 may be a switch mode power supply (SMPS) that receives AC power from the pickup coil 1001 and provides direct current (DC) power to the controller 1020 or the communication interface 1030. In addition, when other components in the cooking appliance 1000b and the controller 1020 and the communication interface 1030 require other forms of DC power and AC power in addition to commercial AC power, the power supply 1010 may include an inverter and / or a converter that supplies AC power and DC power thereto.

[0117] The power supply 1010 may include a rectifier (rectifier circuit) that converts AC power into DC power. The changing alternating current may be converted into a direct current with a constant amplitude. The rectifier may convert an AC voltage whose amplitude and polarity (positive voltage or negative voltage) vary over time into a DC voltage whose polarity remains unchanged over time, and may convert an AC current whose amplitude and direction (positive current or negative current) vary over time into a DC current with a constant amplitude. The rectifier may include a bridge diode. The bridge diode may convert an AC voltage whose polarity varies over time into a positive voltage with a constant polarity, and convert an AC current whose direction varies over time into a positive current flowing in a constant direction. The rectifier may include a DC link capacitor. The DC link capacitor may convert a positive voltage whose amplitude varies over time into a DC voltage with a constant amplitude. An inverter connected to the DC link capacitor may generate AC power with various frequencies and amplitudes required by the second type cooking appliance 1000b, and a converter may generate DC power with various amplitudes required by the second type cooking appliance 1000b.

[0118] The controller 1020 may include at least one processor to control all operations of the second type cooking appliance 1000b. For example, the at least one processor included in the controller 1020 may control the power supply 1010, the communication interface 1030, etc. The processor of the controller 1020 may be a micro control unit (MCU).

[0119] According to an embodiment of the present disclosure, the controller 1020 may detect a power transmission mode of power received from the heating device 2000 via the power supply 1010, thereby identifying the current position of the cooking appliance 1000b. For example, the controller 1020 may compare a pre-stored power transmission mode of each cooking zone with the detected power transmission mode, thereby determining which cooking zone corresponds to the detected power transmission mode. In this case, the second type cooking appliance 1000b may further include a voltage sensor for detecting the power transmission mode.

[0120] The controller 1020 may control the communication interface 1030 to transmit or receive data. For example, the controller 1020 may control the communication interface 1030 to transmit at least one of identification information, location information, or communication connection information of the second type cooking appliance 1000b to the heating device 2000.

[0121] According to an embodiment of the present disclosure, the PCB 1005 of the second type cooking utensil 1000b may include a sensor unit 1040. In this case, the controller 1020 may control the sensor unit 1040. For example, the first temperature sensor 1041 of the sensor unit 1040 may measure the temperature of the content in the second type cooking utensil 1000b, and the controller 1020 may send the measurement result to the communication interface 1030. In addition, the controller 1020 may monitor the temperature of the content at regular intervals using the first temperature sensor 1041. In addition, the controller may control the communication interface 1030 to send the temperature information of the content to the heating device 2000 by using short-range wireless communication. According to an embodiment of the present disclosure, the sensor unit 1040 may further include a second temperature sensor 1042 for measuring the temperature of the bottom surface of the second type cooking utensil 1000b or the temperature of the heater (not shown) heated via the receiving coil 1003 when the second type cooking utensil 1000b is heated in an inductive manner, and the controller 1020 may send the temperature measured by the second temperature sensor 1042 to the communication interface 1030. The controller 1020 may also control the communication interface 1030 to transmit temperature information of the heater or the bottom surface to the heating device 2000 by using short-range wireless communication.

[0122] The communication interface 1030 may include one or more components for implementing communication between the second type cooking appliance 1000b and the heating device 2000, between the second type cooking appliance 1000b and a server device (not shown), or between the second type cooking appliance 1000b and a mobile terminal (not shown). For example, the communication interface 1030 may include a short-distance communication interface, a long-distance communication interface, etc.

[0123] The short-distance communication interface may include, but is not limited to, a Bluetooth communication interface, a BLE communication interface, an NFC interface, a WLAN (or Wi-Fi) communication interface, a Zigbee communication interface, an IrDA communication interface, a WFD communication interface, a UWB communication interface, an Ant+ communication interface, etc. When the second type cooking appliance 1000b is remotely controlled by a server device in an IoT environment, a long-distance communication interface may be used to communicate with the server device (not shown). The long-distance communication interface may include the Internet, a computer network (e.g., a LAN or WAN), and a mobile communication interface. The mobile communication interface may include, but is not limited to, a 3G module, a 4G module, a 5G module, an LTE module, a NB-IoT module, an LTE-M module, etc.

[0124] According to an embodiment of the present disclosure, the second type cooking appliance 1000b may transmit information to the server device via the heating device 2000. For example, the second type cooking appliance 1000b may transmit information obtained by the second type cooking appliance 1000b itself (e.g., temperature information of the content in the second type cooking appliance 1000b, temperature information of the bottom surface or the heater, etc.) to the heating device 2000 by using short-range wireless communication (e.g., Bluetooth, BLE, etc.). In this case, the heating device 2000 may transmit the information obtained from the second type cooking appliance 1000b to the server device by accessing the server device via a WLAN (Wi-Fi) communication interface or a long-range communication interface (e.g., the Internet). In addition, the server device may receive the information obtained from the second type cooking appliance 1000b from the heating device 2000, and provide the information to the user via a mobile device connected to the server device. According to an embodiment of the present disclosure, the heating device 2000 may directly transmit the information obtained from the second type cooking appliance 1000b to the user's mobile terminal via D2D communication (e.g., WFD communication or BLE communication).

[0125] in addition, Figure 2 and Figure 3 Not all components shown are necessary. The second type of cooking appliance 1000b may be used with Figure 2 or Figure 3For example, in addition to the power supply 1010, the controller 1020, the communication interface 1030, and the sensor 1040, the second type cooking appliance 1000b may also include a user interface, a memory, a battery, a heater, an insulating pad, a bracket, a relay, a thermal fuse, etc.

[0126] Here, the user interface may include an input interface for receiving user input and an output interface for outputting information. The output interface is used to output a video signal or an audio signal. The output interface may include a display, an audio output interface, a vibration motor, etc. When the display and the touch pad form a layer structure to constitute a touch screen, the display may serve as an input interface and an output interface. The audio output interface may output audio data received via the communication interface 1030 or stored in a memory (not shown).

[0127] According to an embodiment of the present disclosure, when the second type cooking appliance 1000b includes a battery, the second type cooking appliance 1000b may use the battery as an auxiliary power source. For example, when the second type cooking appliance 1000b provides a keep warm function, even if the power transmission from the heating device 2000 is stopped, the second type cooking appliance 1000b may monitor the temperature of the contents in the second type cooking appliance 1000b by using the power from the battery. When the temperature of the contents in the second type cooking appliance 1000b drops below a critical temperature, the second type cooking appliance 1000b may send a notification to the mobile terminal or request power transmission from the heating device 2000 by using the power from the battery.

[0128] In addition, before receiving power from the heating device 2000, the second type cooking appliance 1000b can use power from the battery to drive the communication interface 1030 and send a wireless communication signal to the heating device 2000, so that the heating device 2000 can recognize the second type cooking appliance 1000b in advance. The battery may include a secondary battery (e.g., a lithium-ion battery, a nickel-cadmium battery, a polymer battery, a nickel-metal hydride battery, etc.), a supercapacitor, etc., but is not limited thereto. A supercapacitor is a capacitor with very high capacitance and is also called an ultracapacitor or an ultra-high capacity capacitor.

[0129] According to an embodiment of the present disclosure, when the second type cooking appliance 1000b includes a memory, the memory can store programs required for the processor included in the controller 1020 to perform processing or control and input / output data (for example, power transmission mode information for each cooking zone, identification information about the second type cooking appliance 1000b, etc.).

[0130] The memory may include at least one type of storage medium, namely, at least one of a flash memory, a hard disk memory, a multimedia card micro memory, a card memory (e.g., a secure digital (SD) card or an ultra-digital (XD) memory), a random access memory (RAM), a static RAM (SRAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), a PROM, a magnetic memory, a magnetic disk, or an optical disk. The programs stored in the memory may be classified into a plurality of modules according to their functions. At least one artificial intelligence (AI) model may be stored in the memory.

[0131] In addition, according to an embodiment of the present disclosure, the second type cooking appliance 1000b may include: a 2-1 type cooking appliance 1000b-1 including an IH metal (e.g., an iron component); and a 2-2 type cooking appliance 1000b-2 including a receiving coil 1003. In the case of the 2-1 type cooking appliance 1000b-1, as with the first type cooking appliance 1000a which is a general IH container, an eddy current may be generated in the IH metal of the 2-1 type cooking appliance 1000b-1, and the eddy current may be used to heat the contents in the 2-1 type cooking appliance 1000b-1. The 2-1 type cooking appliance 1000b-1 may include, but is not limited to, a smart kettle, a rice cooker (smart pot), and the like.

[0132] Compared with the 2-1 type cooking appliance 1000b-1, the 2-2 type cooking appliance 1000b-2 may further include a receiving coil 1003 and a load 1004. The receiving coil 1003 may be a coil that receives wireless power transmitted from the heating device 2000 and drives the load 1004. For example, when the wireless power is transmitted by the transmitting coil ( Figure 6b When the magnetic field generated by the current flowing in the working coil 2120) passes through the receiving coil 1003, the induced current flows through the receiving coil 1003, so that energy can be supplied to the load 1004. Hereinafter, when the induced current flows in the receiving coil 1003 due to the magnetic field generated by the transmitting coil, it can be considered that the receiving coil 1003 receives power wirelessly from the transmitting coil. According to an embodiment of the present disclosure, the receiving coil 1003 may have a concentric circle shape or an elliptical shape, but is not limited thereto. According to an embodiment of the present disclosure, the 2-2 type cooking appliance 1000b-2 may include a plurality of receiving coils 1003. For example, the 2-2 type cooking appliance 1000b-2 may include a receiving coil for a heat preservation heater and a receiving coil for a heating heater. In this case, the receiving coil for the heating heater can drive the heating heater, and the receiving coil for the heat preservation heater can drive the heat preservation heater.

[0133] According to an embodiment of the present disclosure, in the 2-2 type cooking appliance 1000b-2, the pickup coil 1001, the communication coil 1002, and the receiving coil 1003 may be arranged on the same layer. Figure 3 , the communication coil 1002 , the receiving coil 1003 , and the pickup coil 1001 may be arranged at the innermost part, the middle part, and the outermost part of the layer, respectively, but are not limited thereto.

[0134] Figure 4 is a diagram showing a coil arrangement in a cooking appliance according to an embodiment of the present disclosure.

[0135] refer to Figure 4 410, the receiving coil 1003 may be arranged at the innermost portion, the pickup coil 1001 may be arranged at the middle portion, and the communication coil 1002 may be arranged at the outermost portion. Figure 4 420, the receiving coil 1003 may be arranged at the innermost portion, the communication coil 1002 may be arranged at the middle portion, and the pickup coil 1001 may be arranged at the outermost portion. In addition, although not shown, the three types of coils may be arranged in the following order from the innermost to the outermost:

[0136] 1) Pickup coil 1001 - Receiving coil 1003 - Communication coil 1002

[0137] 2) Pickup coil 1001 - communication coil 1002 - receiving coil 1003

[0138] 3) Communication coil 1002 - Pickup coil 1001 - Receiving coil 1003

[0139] According to an embodiment of the present disclosure, in the 2-2 type cooking appliance 1000b-2, the pickup coil 1001, the communication coil 1002, and the receiving coil 1003 may be arranged in a stacked structure. Figure 4 In 430 , the pickup coil 1001 and the communication coil 1002 , neither of which has a large number of turns, form one layer, and the receiving coil 1003 forms another layer, so that the two layers can be stacked.

[0140] The load 1004 may include, but is not limited to, a heater, an insulating pad, a bracket, a bracket temperature sensor, a motor, or a battery to be charged, etc. The heater is used to heat the contents in the 2-2 type cooking utensil 1000b-2. The heater may have various shapes, and the housing of the heater may be formed of various materials (e.g., iron, stainless steel, copper, aluminum, Inconel, Inconel, etc.). According to an embodiment of the present disclosure, the 2-2 type cooking utensil 1000b-2 may include a plurality of heaters. For example, the 2-2 type cooking utensil 1000b-2 may include a heat preservation heater and a heating heater. The heat preservation heater and the heating heater may produce different levels of heating output. For example, the heating level of the heat preservation heater may be lower than the heating level of the heating heater.

[0141] According to an embodiment of the present disclosure, the 2-2 type cooking appliance 1000b-2 may further include a resonant capacitor (not shown) between the receiving coil 1003 and the load 1004. In this case, the resonance value may be set differently according to the amount of power required by the load 1004. In addition, according to an embodiment of the present disclosure, the 2-2 type cooking appliance 1000b-2 may further include a switch 1015 (e.g., a relay switch or a semiconductor switch) for turning on / off power for operation of the load 1004. When an empty heating notification indicating that the 2-2 type cooking appliance 1000b-2 is experiencing empty heating is received from the heating device 2000, the controller 1020 of the PCB 1005 may control the switch 1015 to stop the operation of the receiving coil 1003.

[0142] According to an embodiment of the present disclosure, the 2-2 type cooking appliance 1000b-2 may include but is not limited to a heater application product (eg, a coffee machine (coffee dripper) or a toaster), a motor application product (eg, a blender), and the like.

[0143] On the other hand, according to an embodiment of the present disclosure, the first type cooking utensil 1000a including the IH metal may be detected in the IH container detection mode of the heating device 2000, but may not be detected in the small appliance detection mode of the heating device 2000 because the first type cooking utensil 1000a cannot communicate with the heating device 2000. The 2-1 type cooking utensil 1000b-1 including the IH metal may be detected in the IH container detection mode of the heating device 2000, even in the small appliance detection mode of the heating device 2000, because communication with the heating device 2000 is possible. Since the 2-2 type cooking utensil 1000b-2 does not include the IH metal, the 2-2 type cooking utensil 1000b-2 may not be detected in the IH container detection mode of the heating device 2000, but may be detected in the small appliance detection mode of the heating device 2000 because communication with the heating device 2000 is possible. Hereinafter, unless otherwise specifically stated in the specification, the cooking appliance 1000 refers to a second type cooking appliance 1000b capable of performing a communication function.

[0144] Figure 5a is a diagram illustrating a load structure in a cooking appliance according to an embodiment of the present disclosure.

[0145] Figure 5a The illustrated cooking appliance 1000 is a 2-2 type cooking appliance 1000 b - 2 , which is an example of the cooking appliance 1000 that heats up as the receiving coil 1003 heats the heater.

[0146] The load 1004 may include a heater 1014 heated by the receiving coil 1003 , an insulating pad 1024 between the heater 1014 and the bracket 1034 , the bracket 1034 , and a second temperature sensor 1042 for detecting a temperature of the bracket 1034 , but is not limited thereto.

[0147] As described above, the heater 1014 is used to heat the contents of the cooking appliance 1000. The heater 1014 may have various shapes, and the housing of the heater 1014 may be formed of various materials (eg, iron, stainless steel, copper, aluminum, Inconel, Inconel, etc.).

[0148] The insulating pad 1024 is used to insulate the bracket 1034 from the heater 1014 to prevent the risk of the bracket 1034 and the heater 1014 not being insulated when the bracket 1034 is formed of a conductive material.

[0149] The bracket 1034 includes a second temperature sensor 1042 so that the temperature of the heater 1014 can be indirectly sensed. In addition, the bracket 1034 is used to fix the structure so that the heater 1014 can be combined with the cooking device 1000, and can be used as a heat sink that evenly distributes the heat generated by the receiving coil 1003 to prevent the heat from being concentrated in one area on the receiving coil 1003.

[0150] The second temperature sensor 1042 may also be a bracket temperature sensor or a heater temperature sensor and sense the temperature of the bracket 1034 or the heater 1014. The temperature information of the bracket 1034 detected by the second temperature sensor 1042 may be sent to the heating device 2000 via the communication interface 1030. Since the second temperature sensor 1042 mainly senses the temperature of the heater 1014, it is Figure 5a Differently, it is expected that the second temperature sensor 1042 can be directly attached to the heater 1014, but when the second temperature sensor 1042 is directly attached to the heater 1014, when the heater 1014 is heated due to a malfunction, the second temperature sensor 1042 may be damaged. Therefore, the second temperature sensor 1042 can be attached to the bracket 1034 to indirectly measure the temperature of the heater 1014, so that the second temperature sensor 1042 can be prevented from being damaged.

[0151] Figure 5b is a block diagram illustrating a path through which power is transmitted from a cooking appliance to a heater according to an embodiment of the present disclosure.

[0152] refer to Figure 5b , when the cooking appliance 1000 receives wireless power from the heating device 2000 through the receiving coil 1003, the cooking appliance 1000 generates resonance between the inductor and the capacitor via the resonator 1006 to supply AC power to the load 1004. The resonant AC power passes through the relay 1007 and the thermal fuse 1008, and is then used to heat the heater 1014. In order to protect the heater 1014 of the cooking appliance 1000, in an emergency, the controller 1020 of the cooking appliance 1000 can control the relay 1007 or the thermal fuse 1008 to cut off the power transmitted to the heater 1014. According to an embodiment of the present disclosure, when an empty heating notification is received, the cooking appliance 1000 can control the relay 1007 or the thermal fuse 1008 via the controller 1020 to cut off the power transmitted to the heater 1014. Alternatively, the cooking appliance 1000 may detect by itself whether the cooking appliance 1000 itself is subjected to empty heating, and control the relay 1007 or the thermal fuse 1008 through the controller 1020 to cut off the power to the heater 1014 .

[0153] In the following, reference Figure 6a and Figure 6bA heating device 2000 that transmits power to the cooking appliance 1000 is described.

[0154] Figure 6a is a block diagram illustrating functions of a heating device (wireless power transmission device) according to an embodiment of the present disclosure. Figure 6b is a block diagram illustrating functions of a heating device (wireless power transmission device) according to an embodiment of the present disclosure.

[0155] refer to Figure 6a According to an embodiment of the present disclosure, the heating device 2000 may include a wireless power transmitter 2100, a processor 2200, a communication interface 2300, and an output interface 2510. However, Figure 6a Not all components shown are necessary. Figure 6a The components shown may be implemented with more or fewer components.

[0156] refer to Figure 6b According to an embodiment of the present disclosure, the heating device 2000 may further include a sensor unit 2400, a user interface 2500, and a memory 2600 in addition to the wireless power transmitter 2100, the processor 2200, and the communication interface 2300. The communication interface 2300 may include a short-range communication interface 2310 and a long-range communication interface 2320.

[0157] Hereinafter, the above components are described.

[0158] The wireless power transmitter 2100 may include a driver 2110 and a working coil 2120, but is not limited thereto. The driver 2110 may receive power from an external source and supply current to the working coil 2120 according to a driving control signal from the processor 2200. The driver 2110 may include an electromagnetic interference (EMI) filter 2111, a rectifier circuit 2112, an inverter circuit 2113, a distribution circuit 2114, a current detection circuit 2115, and a driving processor 2116, but is not limited thereto.

[0159] The EMI filter 2111 can block high-frequency noise included in the AC power supplied from the external source while allowing an AC voltage and an AC current of a predetermined frequency (e.g., 50 Hz or 60 Hz) to pass. A fuse and a relay can be provided between the EMI filter 2111 and the external source to prevent overcurrent. The AC power whose high-frequency noise is blocked by the EMI filter 2111 is supplied to the rectifier circuit 2112.

[0160] The rectifier circuit 2112 can convert AC power into DC power. For example, the rectifier circuit 2112 can convert an AC voltage whose amplitude and polarity (positive voltage or negative voltage) vary over time into a DC voltage whose polarity remains unchanged over time, and can convert an AC current whose amplitude and direction (positive current or negative current) vary over time into a DC current with a constant amplitude. The rectifier circuit 2112 may include a bridge diode. For example, the rectifier circuit 2112 may include four diodes. The bridge diode may convert an AC voltage whose polarity varies over time into a positive voltage with a constant polarity, and convert an AC current whose direction varies over time into a positive current flowing in a constant direction. The rectifier circuit 2112 may include a DC link capacitor. The DC link capacitor may convert a positive voltage whose amplitude varies over time into a DC voltage with a constant amplitude.

[0161] The inverter circuit 2113 may include: a switch circuit for supplying a drive current to the working coil 2120 or blocking the drive current to the working coil 2120; and a resonant circuit for resonating with the working coil 2120. The switch circuit may include a first switch and a second switch. The first switch and the second switch may be connected in series between the positive line and the negative line of the rectifier circuit 2112. The first switch and the second switch may each be turned on or off according to a drive control signal from the drive processor 2116.

[0162] The inverter circuit 2113 can control the current supplied to the working coil 2120. For example, the amplitude and direction of the current flowing through the working coil 2120 can be changed according to the on / off of the first switch and the second switch included in the inverter circuit 2113. In this case, AC current can be supplied to the working coil 2120. AC current is supplied to the working coil 2120 according to the switching operation of the first switch and the second switch. In addition, the longer the switching cycle of the first switch and the second switch (for example, the lower the switching frequency of the first switch and the second switch), the larger the current supplied to the working coil 2120, and the greater the intensity of the magnetic field (the output of the heating device 2000) generated by the working coil 2120.

[0163] When the heating device 2000 includes a plurality of working coils 2120, the driver 2110 may include a distribution circuit 2114. The distribution circuit 2114 may include a plurality of switches that allow current supplied to the plurality of working coils 2120 to pass or block the current, and the plurality of switches may be turned on or off according to a distribution control signal from the driving processor 2116.

[0164] The current detection circuit 2115 may include a current sensor that measures the current output from the inverter circuit 2113. The current sensor may transmit an electrical signal corresponding to the measured current value to the drive processor 2116.

[0165] The drive processor 2116 may determine the switching frequency (on / off frequency) of the switching circuit included in the inverter circuit 2113 based on the output power (power level) of the heating device 2000. The drive processor 2116 may generate a drive control signal for turning on / off the switching circuit according to the determined switching frequency.

[0166] The working coil 2120 may generate a magnetic field for heating the cooking utensil 1000. For example, when a driving current is supplied to the working coil 2120, a magnetic field may be induced around the working coil 2120. When a current (i.e., an AC current) whose amplitude and direction vary with time is supplied to the working coil 2120, a magnetic field whose amplitude and direction vary with time may be induced around the working coil 2120. The magnetic field around the working coil 2120 may pass through a top plate made of tempered glass and reach the cooking utensil 1000 placed on the top plate. Due to the magnetic field whose amplitude and direction vary with time, an induced magnetic field may be generated in the receiving coil 1003 included in the cooking utensil 1000, and the induced magnetic field may cause a current to flow through the receiving coil 1003 to heat the load 1004.

[0167] The processor 2200 controls all operations of the heating device 2000. For example, the processor 2200 may control the wireless power transmitter 2100, the communication interface 2300, the sensor unit 2400, the user interface 2500, and the memory 2600 by executing a program stored in the memory 2600.

[0168] According to an embodiment of the present disclosure, the heating device 2000 may be equipped with an AI processor. The AI ​​processor may be manufactured in the form of a dedicated hardware chip for AI, or manufactured as a part of an existing general-purpose processor (e.g., a central processing unit (CPU) or an application processor (AP)) or a dedicated graphics processor (e.g., a graphics processing unit (GPU)) and installed on the heating device 2000.

[0169] According to an embodiment of the present disclosure, the processor 2200 can control the inverter circuit 2113 to supply a preset level of power to the cooking appliance 1000 so as to drive the communication interface 1030 of the cooking appliance 1000, and when the communication interface 1030 of the cooking appliance 1000 is driven by the power, the processor 2200 can receive a first wireless communication signal sent from the communication interface 1030 of the cooking appliance 1000.

[0170] In an embodiment of the present disclosure, when a first wireless communication signal transmitted from the cooking appliance 1000 is detected, the processor 2200 may control the inverter circuit 2113 so that the plurality of working coils 2120 generate a magnetic field according to a plurality of different power transmission modes. The plurality of power transmission modes may be set differently based on at least one of the duration of the power transmission interval, the duration of the power cut-off interval, or the power level. For example, the processor 2200 may control the inverter circuit 2113 to transmit power by differently combining the duration of the power transmission interval, the duration of the power cut-off interval, or the power level of each cooking zone of the heating device 2000.

[0171] In addition, the processor 2200 may receive a second wireless communication signal via the communication interface 1300, the second wireless communication signal including information about a first cooking zone corresponding to a first power transmission mode detected at the position of the cooking appliance 1000 among the plurality of power transmission modes and identification information about the cooking appliance 1000, and based on the second wireless communication signal, output information about a first cooking zone where the cooking appliance 1000 is located among the plurality of cooking zones and identification information about the cooking appliance 1000 via the output interface 2510. In this way, the heating device 2000 may identify a cooking zone where the cooking appliance 1000 is located by using the plurality of power transmission modes.

[0172] In an embodiment of the present disclosure, the processor 2200 may receive information indicating whether the cooking appliance 1000 is subjected to empty heating from the cooking appliance 1000. The processor 2200 may output an indication that the cooking appliance 1000 is subjected to empty heating via the output interface 2510.

[0173] According to an embodiment of the present disclosure, the processor 2200 may establish a communication connection with the cooking appliance 1000 based on the communication connection information included in the second wireless communication signal, and control the inverter circuit 2113 to send a first level of power (low power) to the pickup coil 1001 of the cooking appliance 1000 to maintain the communication connection with the cooking appliance 1000. In addition, when an operation command for the cooking appliance 1000 is received from the user, the processor 2200 may control the inverter circuit 2113 to send a second level of power (high power) to the cooking appliance 1000 to operate the cooking appliance 1000. In this case, the first level of power is less than the second level of power. In an embodiment of the present disclosure, the processor 2200 may send a second level of power to the cooking appliance 1000, which is a separate level different from the level for heating the cooking appliance 1000 input by the user, and determine whether the cooking appliance 1000 undergoes empty heating. For example, even if the level input by the user for heating the cooking appliance 1000 is 1500 watts (W), the processor 2200 may first heat the cooking appliance 1000 with 800 W of power (which is the power used for no-heating determination) instead of heating the cooking appliance 1000 with 1500 W of power corresponding to the user input level, in order to determine whether the cooking appliance 1000 undergoes no-heating.

[0174] The communication interface 2300 may include one or more components that implement communication between the heating device 2000 and the cooking utensil 1000 or between the heating device 2000 and the server device (not shown). For example, the communication interface 2300 may include a short-distance communication interface and a long-distance communication interface. The short-distance communication interface may include, but is not limited to, a Bluetooth communication interface, a BLE communication interface, an NFC interface, a WLAN (or Wi-Fi) communication interface, a Zigbee communication interface, an IrDA communication interface, a WFD communication interface, a UWB communication interface, an Ant+ communication interface, and the like. When the cooking utensil 1000 is remotely controlled by a server device in an IoT environment, a long-distance communication interface may be used to communicate with the server device (not shown). The long-distance communication interface may include the Internet, a computer network (e.g., a LAN or WAN), and a mobile communication interface. The mobile communicator sends a wireless signal to or receives a wireless signal from at least one of a base station, an external terminal, or a server on a mobile communication network. In this case, the wireless signal may be a voice call signal, a video call signal, or data in any of various formats according to the transmission and reception of text / multimedia messages. The mobile communication interface may include but is not limited to a 3G module, a 4G module, an LTE module, a 5G module, a sixth generation (6G) module, a NB-IoT module, an LTE-M module, etc.

[0175] The sensor unit 2400 may include a container detection sensor 2410 and a temperature sensor 2420 , but is not limited thereto.

[0176] The container detection sensor 2410 may be a sensor for detecting whether the cooking utensil 1000 is placed on the top plate. For example, the container detection sensor 2410 may be implemented as a current sensor, but is not limited thereto. The container detection sensor 2410 may be implemented as at least one of a proximity sensor, a touch sensor, a weight sensor, a temperature sensor, an illumination sensor, or a magnetic sensor.

[0177] The temperature sensor 2420 may detect the temperature of the bottom surface of the cooking utensil 1000 placed on the top plate or the temperature of the top plate. The working coil 2120 heats the cooking utensil 1000 inductively, and the cooking utensil 1000 may overheat depending on its material. Therefore, the heating device 2000 may detect the temperature of the cooking utensil 1000 placed on the top plate or the temperature of the top plate, and when the cooking utensil 1000 overheats, the working coil 2120 operation is stopped. In an embodiment of the present disclosure, the temperature sensor 2420 may be installed near the working coil 2120. For example, the temperature sensor 2420 may be located exactly at the center of the working coil 2120. In an embodiment of the present disclosure, the processor 2200 may detect the empty heating based on the temperature of the bottom surface measured by the temperature sensor 2420 and the internal temperature of the cooking utensil 1000 received from the cooking utensil 1000.

[0178] According to an embodiment of the present disclosure, the temperature sensor 2420 may include a thermistor whose resistance varies according to temperature. For example, the temperature sensor 2420 may be a negative temperature coefficient (NTC) temperature sensor, but is not limited thereto. The temperature sensor 2420 may be a positive temperature coefficient (PTC) temperature sensor.

[0179] The user interface 2500 may include an output interface 2510 and an input interface 2520. The output interface 2510 is used to output an audio signal or a video signal, and may include a display, an audio output interface, and the like.

[0180] When the display and the touch panel form a layer structure to constitute a touch screen, the display can serve as an input interface as well as an output interface. The display may include at least one of a liquid crystal display (LCD), a thin film transistor LCD (TFT-LCD), a light emitting diode (LED) display, an organic LED (OLED) display, a flexible display, a 3D display, or an electrophoretic display. In addition, the heating device 2000 may include two or more displays according to its implementation configuration. When the cooking utensil 1000 on a specific cooking zone undergoes empty heating, the display may display a text type alarm message "The cooking utensil on the cooking zone 2 undergoes empty heating", or display a graphic icon corresponding to the cooking zone in a manner different from other cooking zones, for example, by displaying only the icon corresponding to the cooking zone where empty heating is occurring in a flashing manner, so that the user can easily recognize that the cooking utensil 1000 on the corresponding cooking zone undergoes empty heating.

[0181] The audio output interface may output audio data received via the communication interface 2300 or stored in the memory 2600. The audio output interface may also output a sound signal related to a function performed by the heating device 2000. For example, the audio output interface may output audio information "the cooking utensil on the cooking zone 2 undergoes empty heating", so that the user can easily identify which cooking zone corresponds to the cooking utensil that undergoes empty heating. The audio output interface may include a speaker, a buzzer, etc.

[0182] According to an embodiment of the present disclosure, the output interface 2510 may display information about the cooking appliance 1000. For example, the output interface 2510 may output a graphical user interface (GUI) corresponding to the identification information about the cooking appliance 1000. The output interface 2510 may output information indicating whether the corresponding cooking appliance 1000 is subjected to empty heating and the identification information based on the identification information about the cooking appliance 1000, and may also output information indicating which cooking area the cooking appliance 1000 is subjected to empty heating. For example, the output interface 2510 may output "the coffee drip filter on the cooking area 2 is subjected to empty heating" via a display or an audio output interface.

[0183] According to an embodiment of the present disclosure, when the processor 2200 does not receive information about the cooking zone where the cooking appliance 1000 is located within a predetermined time after controlling the inverter circuit 2113 so that the plurality of working coils 2120 generate a magnetic field according to a plurality of different power transmission modes, the output interface 2510 may output a notification indicating that the location of the cooking appliance 1000 should be checked. In addition, according to an embodiment of the present disclosure, when the communication connection with the cooking appliance 1000 is released, the output interface 2510 may output a notification indicating that the location of the cooking appliance 1000 should be checked.

[0184] The input interface 2520 is used to receive input from the user. The input interface 2520 can be at least one of a keypad, a dome switch, a touch pad (capacitive cover type, resistive cover type, infrared beam type, surface acoustic wave type, integral strain gauge type, piezoelectric type, etc.), a scroll wheel, or a toggle switch, but is not limited thereto.

[0185] The input interface 2520 may include a speech recognition module. For example, the heating device 2000 may receive a speech signal as an analog signal via a microphone, and convert a portion of the speech into a computer-readable text by using an automatic speech recognition (ASR) model. The heating device 2000 may obtain the intention in the user's speech by interpreting the text using a natural language understanding (NLU) model. Here, the ASR model or the NLU model may be an AI model. The AI ​​model may be processed by a dedicated AI processor designed to have a hardware structure specifically for processing the AI ​​model. The AI ​​model may be created via a training process. In this case, creation via a training process refers to creating a predefined operating rule or AI model that is set to perform a desired characteristic (or purpose) by training a basic AI model based on a large amount of training data via a learning algorithm. The AI ​​model may be composed of a plurality of neural network layers. Each of the plurality of neural network layers has a plurality of weight values, and a neural network calculation may be performed via calculations between the calculation results in the previous layer and the plurality of weight values.

[0186] Language understanding is technology for recognizing and applying / processing human language / characters, and can include natural language processing, machine translation, dialogue systems, question answering, speech recognition / synthesis, etc.

[0187] The memory 2600 may store programs and input / output data (eg, a plurality of power transmission modes, etc.) required for processing or control performed by the processor 2200. The memory 2600 may also store an AI model.

[0188] The memory 2600 may include at least one type of storage medium, i.e., at least one of a flash memory, a hard disk memory, a multimedia card micro memory, a card memory (e.g., an SD card or an XD memory), a RAM, an SRAM, a ROM, an EEPROM, a PROM, a magnetic memory, a magnetic disk, or an optical disk. In addition, the heating device 2000 may operate a network storage device or a cloud server that performs a storage function on the Internet.

[0189] Figure 7a is a block diagram illustrating functions of a cooking appliance according to an embodiment of the present disclosure.

[0190] Figure 7aThe illustrated cooking appliance 1000 may include all of the above-described various cooking appliances as well as home appliances that can be heated or driven by the wireless power transmission device 2000 , such as small appliances, etc.

[0191] refer to Figure 7a , the cooking appliance 1000 may include a wireless power receiver 1100, a power source 1010, a controller 1020 including a processor, a communication interface 1030, a sensor unit 1040, a user interface 1050, a relay 1007, and a memory 1060. However, Figure 7a Not all components shown are required. Cooking appliance 1000 may be used with Figure 7a The components shown may be implemented with more or fewer components.

[0192] Since it has been referenced Figures 2 to 4 The components of the cooking appliance 1000 are described, and thus the description already provided above will be omitted herein.

[0193] The controller 1020 may include at least one processor.

[0194] The controller 1020 controls all operations of the cooking appliance 1000. The controller 1020 may control the wireless power receiver 1100, the communication interface 1030, the sensor unit 1040, the user interface 1050, and the memory 1060 by executing a program stored in the memory 1060.

[0195] According to an embodiment of the present disclosure, the cooking appliance 1000 may be equipped with an AI processor. The AI ​​processor may be manufactured in the form of a dedicated hardware chip for AI, or may be manufactured as part of an existing general-purpose processor (e.g., CPU or AP) or a dedicated graphics processor (e.g., GPU) and installed on the cooking appliance 1000. In an embodiment of the present disclosure, the controller 1020 may determine by itself whether the cooking appliance 1000 is experiencing empty heating based on the water temperature (or the internal temperature of the cooking appliance 1000) measured by the first temperature sensor 1041 and the temperature of the bottom surface of the cooking appliance 1000 measured by the second temperature sensor 1042. In an embodiment of the present disclosure, the controller 1020 may receive information indicating whether the cooking appliance 1000 is experiencing empty heating from the wireless power transmission device 2000. The controller 1020 may output an indication that the cooking appliance 1000 is experiencing empty heating via the output interface 1052.

[0196] The wireless power receiver 1100 may include a pickup coil 1001, a rectifying circuit 1012, a power source 1010, and a load 1004. In the embodiment of the present disclosure, since the load 1004 is a required component when the cooking appliance 1000 is a 2-2 type cooking appliance 1000b-2, the load 1004 may be omitted when the cooking appliance 1000 is not a 2-2 type cooking appliance 1000b-2.

[0197] As referenced above Figure 5a As described above, the load 1004 may include a heater 1014, an insulating pad 1024 disposed between the heater 1014 and the bracket 1034, and the bracket 1034. The load 1004 may also include a second temperature sensor 1042 for detecting the temperature of the bracket 1034, but in Figure 7a In the block diagram of , for convenience of description, the second temperature sensor 1042 is included in the sensor unit 1040. The rectifying circuit 1012 rectifies and converts the AC power transmitted from the wireless power transmission device 2000 into appropriate power required by the cooking appliance 1000. The power received by the pickup coil 1001 can activate the power supply 1010.

[0198] The communication interface 1030 may include one or more components that implement communication between the cooking appliance 1000 and the wireless power transmission device 2000, between the cooking appliance 1000 and a server device (not shown), or between the cooking appliance 1000 and a mobile device (not shown). For example, the communication interface 1030 may include a short-distance communication interface 1031 and a long-distance communication interface 1032. The short-distance communication interface 1031 may include, but is not limited to, a Bluetooth communication interface, a BLE communication interface, an NFC interface, a WLAN (or Wi-Fi) communication interface, a Zigbee communication interface, an IrDA communication interface, a WFD communication interface, a UWB communication interface, an Ant+ communication interface, and the like. When the cooking appliance 1000 is remotely controlled by a server device in an IoT environment, the long-distance communication interface 1032 may be used to communicate with the server device. The long-distance communication interface 1032 may include the Internet, a computer network (e.g., a LAN or WAN), and a mobile communication interface. The mobile communicator sends a wireless signal to or receives a wireless signal from at least one of a base station, an external terminal, or a server on a mobile communication network. In this case, the wireless signal may be a voice call signal, a video call signal, or data in any of various formats according to the transmission and reception of text / multimedia messages. The mobile communication interface may include but is not limited to a 3G module, a 4G module, an LTE module, a 5G module, a 6G module, a NB-IoT module, a LTE-M module, etc.

[0199] The first temperature sensor 1041 of the sensor unit 1040 may be used to measure the temperature of water (the object being cooked) in the cooking utensil 1000 (the internal temperature of the cooking utensil 1000 when there is no water in the cooking utensil 1000). The second temperature sensor 1042 may be used to measure the temperature of the outer surface of the cooking utensil 1000 (or the temperature of the bottom surface of the cooking utensil 1000).

[0200] The user interface 1050 may include an output interface 1051 and an input interface 1052. The output interface 1051 is used to output an audio signal or a video signal, and may include a display, an audio output interface, and the like.

[0201] When the display and the touch panel form a layer structure to constitute a touch screen, the display can serve as an input interface as well as an output interface. The display may include at least one of an LCD, a TFT-LCD, an LED display, an OLED display, a flexible display, a 3D display, or an electrophoretic display. When the cooking appliance 1000 undergoes empty heating, the display may display a text type alarm message "the cooking appliance undergoes empty heating", or display an indication that the cooking appliance undergoes empty heating in a flashing manner, so that the user can easily recognize that the cooking appliance 1000 undergoes empty heating.

[0202] The audio output interface may output audio data received via the communication interface 1030 or stored in the memory 1060. The audio output interface may also output a sound signal related to a function performed by the cooking appliance 1000. For example, the audio output interface may output audio information "the cooking appliance undergoes empty heating" so that the user can easily recognize that the cooking appliance undergoes empty heating. The audio output interface may include a speaker, a buzzer, etc.

[0203] According to an embodiment of the present disclosure, the output interface 1051 may display information about the cooking appliance 1000. For example, the output interface 1051 may output a GUI corresponding to identification information about the cooking appliance 1000. The output interface 1051 may output information indicating whether the cooking appliance 1000 undergoes empty heating and identification information about the cooking appliance 1000, so as to distinguish the cooking appliance 1000 from other cooking appliances on the wireless power transmission device 2000. For example, the output interface 1051 may output information “the smart kettle undergoes empty heating” via a display or an audio output interface.

[0204] The input interface 1052 is used to receive input from the user. The input interface 1052 can be at least one of a keypad, a dome switch, a touch pad (capacitive cover type, resistive cover type, infrared beam type, surface acoustic wave type, integral strain gauge type, piezoelectric type, etc.), a scroll wheel, or a toggle switch, but is not limited thereto.

[0205] The input interface 1052 may include a speech recognition module. For example, the cooking appliance 1000 may receive a speech signal as an analog signal via a microphone, and convert a portion of the speech into computer-readable text by using an ASR model. The cooking appliance 1000 may obtain the intent in the user's speech by interpreting the text using an NLU model. Here, the ASR model or the NLU model may be an AI model. The AI ​​model may be processed by a dedicated AI processor that is designed to have a hardware structure specifically for processing the AI ​​model. The AI ​​model may be created via a training process. In this case, creation via a training process refers to creating a predefined operating rule or AI model that is set to perform a desired characteristic (or purpose) by training a basic AI model based on a large amount of training data via a learning algorithm. The AI ​​model may be composed of multiple neural network layers. Each of the multiple neural network layers has multiple weight values, and a neural network calculation may be performed via calculations between the calculation results in the previous layer and the multiple weight values.

[0206] Language understanding is technology for recognizing and applying / processing human language / characters, and can include natural language processing, machine translation, dialogue systems, question answering, speech recognition / synthesis, etc.

[0207] The memory 1060 may store a program and input / output data (eg, a plurality of power transmission modes, etc.) required for processing or control performed by the controller 1020. The memory 1060 may also store an AI model.

[0208] Memory 1060 may include at least one type of storage medium, namely, at least one of a flash memory, a hard disk memory, a multimedia card micro memory, a card-type memory (e.g., an SD card or an XD memory), RAM, SRAM, ROM, EEPROM, PROM, a magnetic memory, a magnetic disk, or an optical disk.

[0209] The relay 1007 may be used to stop heating according to the control of the controller 1020 when the cooking appliance 1000 undergoes no heating. Figure 5b It is described that the heating is stopped via the relay 1007, and thus a detailed description thereof will be omitted. According to an embodiment of the present disclosure, the controller 1020 may control the thermal fuse 1008 instead of the relay 1007 to prevent heating.

[0210] Figure 7b is a block diagram illustrating a wired cooking appliance according to an embodiment of the present disclosure.

[0211] exist Figure 7b In the wired cooking appliance 1000e shown, Figure 7aCompared with the cooking appliance 1000 that wirelessly receives power, the wireless power receiver 1100 is replaced with the power receiver 1110. Figure 7b The communication interface 1030, the sensor unit 1040, the user interface 1050 and the memory 1060 included in the wired cooking appliance 1000e perform communication with Figure 7a The functions of the corresponding parts included in the cooking appliance 1000 are the same as those of the corresponding parts included in the cooking appliance 1000, so the detailed description thereof will be omitted here. In addition, since the load 1004 included in the power receiver 1110 can be regarded as Figure 7a The load 1004 is the same as that in FIG. 1 , so the description of the load 1004 will be omitted here.

[0212] The power receiver 1110 receives power through the wire. The power receiver 1110 can receive AC power via a common socket or receive DC power from a battery. When AC power is received, the rectifier circuit 1012 is used to convert the AC power internally. The power supply 1010 is activated by the power received through the socket and converted by the rectifier circuit 1012.

[0213] According to an embodiment of the present disclosure, the cooking appliance 1000 may be Figure 7b The cooking appliance 1000e shown receives power via an electrical line. Fig.17a , Fig.17b , Fig.17c and Fig.17d The heating device 2000 is replaced with a device for supplying power via an electric wire to implement a method of detecting empty heating when heating the cooking appliance 1000e.

[0214] Figure 8 is a diagram illustrating a wireless power transmitter of a heating device (wireless power transmission device) according to an embodiment of the present disclosure.

[0215] refer to Figure 8 810, the heating device 2000 may further include a communication coil 2001, which is in the same plane as the transmission coil (working coil 2120). In this case, the communication coil 2001 may be an NFC antenna coil for NFC communication. Figure 8 The communication coil 2001 is shown to have 1 turn, but the number of turns is not limited thereto. The communication coil 2001 may have a plurality of turns. For example, the communication coil 2001 may be wound with 5 to 6 turns.

[0216] According to an embodiment of the present disclosure, the communication coil 2001 included in the heating device 2000 may be arranged at a position corresponding to the position of the communication coil 1002 included in the cooking appliance 1000. For example, when the communication coil 2001 included in the heating device 2000 is arranged in the central portion of each cooking zone, the communication coil 1002 included in the cooking appliance 1000 may also be arranged in the bottom central portion of the cooking appliance 1000.

[0217] refer to Figure 8 810, when the cooking appliance 1000 is placed on the heating device 2000, the heating device 2000 can supply power to the pickup coil 1001 via the transmission coil 2120. In addition, when the heating device 2000 wirelessly transmits power via the transmission coil 2120, the induced current flows through the receiving coil 1003 of the cooking appliance 1000, thereby supplying energy to the load 1004. The load 1004 may include a motor or a heater 1014, and when the load 1004 is a heater load, such as Figure 5a As shown, the load 1004 may further include an insulating pad 1024, a bracket 1034, and a second temperature sensor 1042. In addition, the load 1004 may be arranged at a position spaced apart from the receiving coil 1003. For example, the power generated by the induced current may drive a motor of a blender or supply energy to a heater 1014 of a coffee drip filter.

[0218] Although referenced Figure 8 An example in which the heating device 2000 includes the communication coil 2001 is described, but when the cooking appliance 1000 does not include the communication coil 1002 , the heating device 2000 may not include the communication coil 2001 .

[0219] refer to Figure 9a A method performed by the heating device 2000 for detecting whether the cooking utensil 1000 placed on the top plate thereof is subjected to empty heating is described.

[0220] Figure 9a is a waveform diagram illustrating a power transmission pattern output from a heating device for determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure.

[0221] refer to Figure 9a , when the user is at time t 0 When the heating start operation (heating start input) is performed at the heating device 2000, the heating device 2000 starts heating (power transmission or power transmission output). Figure 9a The heating mode (power transmission mode) of the waveform diagram is different from the heating mode. Figure 9b Describe this.

[0222] The heating device 2000 gradually increases the power transmission output to achieve a stable output operation. Figure 9a It can be seen that at the time point t when power transmission starts 0 When the load 1004 is determined to have constant characteristics, the heating device 2000 can adjust the output gain so that the power transmission output can reach the target power output faster within the stable power transmission output range.

[0223] In the embodiment of the present disclosure, in order to determine whether the cooking appliance 1000 is subjected to empty heating, the heating device 2000 firstly 0 to 1 During the first interval of , the predetermined power for the empty heating determination is output. Since the heating device 2000 starts power transmission at the time point t 0 At t , the user input for heating the cooking appliance 1000 has been performed, so the heating device 2000 must output power corresponding to the user input, but within a period of time (ie, within a period of time from t 0 to 1 The first interval and the 1 to 2 The heating device 2000 stops outputting power corresponding to the user input during the second interval of t to determine that the heating is idle. 0 to 1 During the first interval of , the power for the empty heating determination is output. For example, when the power corresponding to the user input (e.g., level 6) on the panel of the heating device 2000 is 1500W, the power for the empty heating determination may be output as 800W. In an embodiment of the present disclosure, the power for the empty heating determination may not be fixed by the heating device 2000, but may vary according to the type of the cooking appliance 1000. In other words, when the cooking appliance 1000 is a small electrical appliance having the ability to detect temperature changes in a short period of time even with 800W of power, the heating device 2000 outputs 800W of power to determine the empty heating. When the heating device 2000 is at time point t 0When communication with the cooking appliance 1000 is previously established and identification information about the cooking appliance 1000 is received through communication to determine that the cooking appliance 1000 is a large-capacity home appliance, the heating device 2000 may change the magnitude of the power used for the empty heating determination from 800 W to a higher power of 1000 W. The identification information about the cooking appliance 1000 may include information about the type of the cooking appliance 1000 (e.g., a coffee drip filter, a blender, a pot, a smart kettle, etc.) and the capacity of the cooking appliance 1000. When the cooking appliance 1000 is a type of cooking appliance that does not require determination of empty heating (e.g., when the cooking appliance 1000 is a blender), the heating device 2000 may not determine empty heating.

[0224] In the embodiment of the present disclosure, the heating device 2000 may send time information (time point t t t t t t t t t t t t t t t t t t t t t t t t t 0 ,t 1 and t 2 ), so that the cooking appliance 1000 can autonomously detect empty heating.

[0225] In the embodiments of the present disclosure, Figure 9a After outputting the determined power for air heating during the first interval, the heating device 2000 then outputs the determined power for air heating at time t 1 The output of power for empty heating determination is stopped at. When outputting power for empty heating determination, the first temperature sensor 1041 of the cooking appliance 1000 senses the temperature of the object being cooked in the cooking appliance 1000 or the internal temperature of the cooking appliance 1000, and the second temperature sensor 1042 of the cooking appliance 1000 senses the temperature of the heater (bracket) in the cooking appliance 1000. The controller 1020 of the cooking appliance 1000 controls the communication interface 1030 to send the detected temperature or internal temperature of the object being cooked or the detected temperature of the heater (bracket) to the communication interface 2300 of the heating device 2000. In an embodiment of the present disclosure, the object being cooked in the cooking appliance 1000 may be water. In other words, during determining whether the cooking appliance 1000 undergoes empty heating, the cooking appliance 1000 may detect the temperature of water as the object being cooked via the first temperature sensor 1041, and send information about the temperature of the water to the heating device 2000. When there is no water in the cooking appliance 1000, the first temperature sensor 1041 may detect the internal temperature of the cooking appliance 1000. When the cooking appliance 1000 is a cooking appliance without the second temperature sensor 1042 and the heating device 2000 senses the temperature of the bottom surface of the cooking appliance 1000, the temperature of the heater is replaced by the temperature of the bottom surface.

[0226] The first interval may have a length that varies depending on various conditions (such as the capacity of the cooking appliance 1000, the magnitude of the power used for the idle heating determination, etc.), but may be, for example, about 10 seconds long. As described above, the second temperature sensor 1042 may be attached to the bracket to prevent damage to the bracket, but since the second temperature sensor 1042 may also be regarded as a sensor for detecting the temperature of the heater, throughout this specification, information about the bracket temperature detected by the second temperature sensor 1042 may be regarded as information about the heater temperature.

[0227] In an embodiment of the present disclosure, the heating device 2000 stops outputting power for empty heating determination during the second interval, and continues to receive information about the temperature of the object being cooked and information about the heater temperature from the cooking appliance 1000 via the communication interface 2300. The second interval may have a length that varies depending on various conditions (such as the capacity of the cooking appliance 1000, the magnitude of the power used for empty heating determination, etc.), but may be, for example, about 5 seconds long. The heating device 2000 may determine whether the cooking appliance 1000 is experiencing empty heating based on changes in the temperature of the object being cooked and the heater during the first interval and changes in the temperature of the object being cooked and the heater during the second interval. In an embodiment of the present disclosure, when the heating device 2000 does not receive heater temperature information from the cooking appliance 1000 because the cooking appliance 1000 does not include a heater, the heating device 2000 may measure the temperature of the bottom surface of the cooking appliance 1000 via the bottom surface temperature sensor and store the temperature in the heating device 2000. In an embodiment of the present disclosure, even if the cooking appliance 1000 is a cooking appliance without a heater, the temperature of the bottom surface of the cooking appliance 1000 can be measured by the second temperature sensor 1042 for measuring the temperature of the bottom surface, and the measured temperature of the bottom surface of the cooking appliance 1000 can be sent to the heating device 2000.

[0228] refer to Figure 9b The mode of outputting power for air heating determination is described.

[0229] Figure 9b is a diagram illustrating a power pattern output from a heating device for determining idle heating according to an embodiment of the present disclosure.

[0230] Figure 9b Examples of various power transmission modes according to embodiments of the present disclosure are shown. Figure 9b The power transfer mode in the Figure 9a The envelope of the power transmission waveform.

[0231] For example, Figure 9b The power transmission mode 9010 is shown Figure 9aThe envelope of the power transfer mode is shown in the power transfer mode diagram.

[0232] During the second interval, power transfer is prevented to ensure that the air heating is the same in all power transfer modes. Figure 9b As shown in the power transmission mode 9020 of the embodiment, the power transmission may have a mode of continuously increasing the power output during the first interval. Under the power transmission mode 9010, the first interval is determined by a predetermined time length, and under the power transmission mode 9020, the first interval ends when the amplitude of the transmitted power reaches a specific power amplitude. The power transmission mode 9020 shows that the first interval can be set according to the power amplitude limit associated with the power capacity of the heating device 2000.

[0233] In the power transmission mode 9030, the power output is gradually increased during the first interval, and the reheating output is quickly increased to the power output set by the user during the third interval, compared with the power transmission mode 9010. When the cooking appliance 1000 or the heating device 2000 has a high anti-overheating characteristic, the heating device 2000 can quickly increase the power during the third interval.

[0234] In the power transmission mode 9040, when entering the second interval from the first interval, there may be a period in which the heating output is reduced. Depending on the type of the cooking appliance 1000, the temperature change of the tray-water when the cooking appliance 1000 undergoes empty heating may not be clearly distinguished from the change when the empty heating does not occur, so in order to clarify the difference between the temperature changes, the heating device 2000 can heat the cooking appliance 1000 in the power transmission mode (such as the power transmission mode 9040) by reducing the heating output at a time point within the first interval.

[0235] The processor 2200 of the heating device 2000 may detect or determine empty heating by selecting an appropriate power transmission mode according to the type and capacity of the cooking appliance 1000 .

[0236] refer to Fig.10 Determinations regarding air heating are described.

[0237] Fig.10 is a temperature variation diagram for determining air heating according to an embodiment of the present disclosure.

[0238] exist Fig.10 In the graph, the y-axis represents temperature (°C), and the x-axis represents time (seconds). Figure 9a and Figure 9b In the example of , the first interval is from 0 seconds to 10 seconds, the second interval is from 10 seconds to 15 seconds, and the third interval is after 15 seconds. Fig.101000-1 is a graph showing changes in the temperature of the rack, the temperature of water, and a temperature obtained by subtracting the temperature of water from the temperature of the rack (hereinafter, referred to as "rack-water temperature") when the cooking appliance 1000 undergoes air heating. Fig.10 1000-1, 10 seconds (time point t 1 ) until the time point t when the second interval ends. 2 only decreases. For example, during the second interval, the temperatures of the tray, water, and tray-water have values ​​that continue to increase. In other words, during the second interval, the slopes representing the temperature changes of the tray, water, and tray-water may each have a positive value. However, depending on various conditions (such as the length of the first interval, the amplitude of the output power determined for empty heating, the capacity of the cooking appliance 1000, the amount of water (the object to be cooked) in the cooking appliance 1000, etc.), the temperatures of the tray, water, and tray-water may have slightly decreased values ​​rather than increased values ​​during the second interval. However, when subsequent water heating occurs, this slightly decreased value is significantly smaller than the values ​​of the tray temperature 102, the water temperature 104, and the tray-water temperature 106 during the second interval. Fig.10 In the embodiment of the present disclosure, Fig.10 During the second interval of 1000-1, the temperatures of the tray, water, and tray-water may all have increased values, or at least one of the tray temperature, water temperature, or tray-water temperature may have a slightly decreased value.

[0239] When the second interval ends and then the heating device 2000 outputs power corresponding to the user input during the third interval, the temperatures of the tray, the water, and the tray-water increase again.

[0240] Fig.10 1000 - 2 is a graph showing changes in the rack temperature 102 , the water temperature 104 , and the rack-water temperature 106 when water is present in the cooking appliance 1000 and water heating occurs.

[0241] refer to Fig.10 1000-2 in FIG. 1000-2, it can be seen that during the first interval, the temperatures of the bracket, water, and bracket-water all increase, and then during the second interval, when the output from the heating device 2000 is cut off, the temperature increases with the time point t 1(10 seconds) compared to the temperature of the bracket and bracket-water at the second interval, the temperature of the bracket and bracket-water is respectively reduced. In other words, in an embodiment of the present disclosure, during the second interval, the slope representing the temperature change of the bracket and bracket-water can each have a negative value. During the second interval, not only the temperature of the bracket and bracket-water has a reduced value, but the temperature of the water can also have a reduced value. In other words, the temperature of the bracket and bracket-water having a reduced value during the second interval can be represented as the slope of the temperature change of the bracket and bracket-water having a negative value during the second interval. Referring to 1000-2, when the second interval ends and the heating device 2000 outputs power corresponding to the user input, the temperature of the bracket, water, and bracket-water rises again.

[0242] Fig.11 is a graph showing changes in temperature with respect to water volume according to an embodiment of the present disclosure.

[0243] refer to Fig.11 , 1100 - 1 is a graph showing changes in the temperature of the tray-water relative to the amount of water in the cooking appliance 1000 , and 1100 - 2 is a graph showing changes in the temperature of the tray relative to the amount of water in the cooking appliance 1000 .

[0244] Referring to the graph 1100-1 showing the change in the temperature of the water in the cooking device 1000, the graph 1100-1 shows the change in the temperature of the water in the cooking device 1000 when the water volume is 300 ml, 200 ml, 100 ml and 0 ml (empty heating). As in the above example, the processor 2200 of the heating device 2000 performs a temperature control operation at a time point t10 seconds after the start of heating. 1 The power output sent for heating the cooking appliance 1000 is cut off at Fig.11 In the graph 1100-1, the inflection point of the change in the temperature of the bracket-water appears at the time point t when the power output is cut off. 1 The reason for the several seconds after that is that even if the power output is cut off, there is a delay of several seconds before the effect of the power output cut is directly reflected in the temperature of the rack and the water. For the same reason, from the time point t when reheating starts after 15 seconds has passed, 2 Starting from a time point a few seconds later, the temperature of the water in the tray increases again. In the embodiment of the present disclosure, the specific time delay that occurs before the change in the temperature of the water in the tray in the cooking appliance 1000 is reflected can be based on t 1 ' and t 2 'The interval between instead of t 1 and t 2In an embodiment of the present disclosure, the heating device 2000 may send such time delay information to the cooking appliance 1000 so that the cooking appliance 1000 may use the time delay information when determining the empty heating.

[0245] Can be obtained from Fig.11 As shown in the graph 1100-1, when the cooking appliance 1000 is at t 1 and t 2 During the interval between the empty heating, the temperature of the bracket-water is at t 1 and t 2 between (to be precise, between t 1 ' and t 2 On the other hand, when the cooking appliance 1000 is not subjected to empty heating and water remains in the cooking appliance 1000 even if the amount of water changes, such as 300 ml, 200 ml, and 100 ml, the temperature of the water in the tray increases at t when the heating device 2000 cuts off the power output. 1 and t 2 between (to be precise, between t 1 ' and t 2 '), or the slope corresponding to this temperature change has a negative value. Fig.11 As can be seen from the graph 1100-1, at time point t 2 'When cooking is stopped afterwards, the heating device 2000 cuts off the power output and the temperature of the tray-water decreases.

[0246] Referring to the graph 1100-2 showing the change in the temperature of the tray relative to the amount of water in the cooking device 1000, the graph 1100-2 shows the change in the temperature of the tray when the amount of water is 300 ml, 200 ml, 100 ml, and 0 ml (empty heating). As in the above example, the processor 2200 of the heating device 2000 performs a temperature control operation at a time point t10 seconds after the start of heating. 1 The power output for heating the cooking appliance 1000 is cut off at Fig.11 In the graph 1100-2, the inflection point of the temperature change of the bracket appears at the time point t when the power output is cut off. 1 The reason for the delay of several seconds is that even if the power output is cut off, there is a delay of several seconds before the effect of the output cut is directly reflected in the temperature of the rack and the water. For the same reason, the time point t when reheating starts after 15 seconds has passed is 2Starting from a time point a few seconds later, the temperature of the bracket increases again. In an embodiment of the present disclosure, it may be desirable to reflect a delay of a predetermined time that occurs before a change in the temperature of the bracket in the cooking appliance 1000, based on t 1 '' and t 2 '' instead of the interval between t 1 and t 2 Compared with the graph 1100-1, the time point t in the graph 1100-2 is 1 and t 2 Compared with the time point t in the graph 1100-1 1 and t 2 Same as, but at time point t in graph 1100-2 1 '' and t 2 '' can be compared with the time point t in the curve diagram 1100-1 1 ' and t 2 In an embodiment of the present disclosure, the heating device 2000 may send such time delay information to the cooking appliance 1000, so that the cooking appliance 1000 may use the time delay information when determining that the heating is empty.

[0247] Can be obtained from Fig.11 As shown in the graph 1100-2, when the cooking appliance 1000 is at t 1 and t 2 The temperature change of the bracket during the interval between the empty heating and the temperature change of the bracket during the empty heating, or the slope of the change, is expressed as 1 and t 2 between (to be precise, between t 1 '' and t 2 On the other hand, when the cooking appliance 1000 is not subjected to empty heating and water remains in the cooking appliance 1000 even if the amount of water changes, such as 300 ml, 200 ml, and 100 ml, the temperature change of the bracket or the slope representing the change is greater than t when the heating device 2000 cuts off the power output. 1 and t 2 between (to be precise, between t 1 '' and t 2 '') can have negative values. Fig.11 As shown in the graph 1100-2, at time point t 2 ''When cooking is stopped afterwards, the heating device 2000 cuts off the power output and the temperature of the bracket decreases.

[0248] Fig.12 is a graph for determining empty heating when reheating a heating device according to an embodiment of the present disclosure.

[0249] Assume that when the heating device 2000 starts the operation of heating the cooking appliance 1000 and completes the operation as shown in FIG. Fig.11 When determining the process of empty heating as shown, the heating device 2000 determines that the cooking appliance 1000 does not undergo empty heating. In an embodiment of the present disclosure, when the cooking appliance 1000 is reheated by outputting power corresponding to the user input, the heating device 2000 may determine empty heating again.

[0250] Can be obtained from Fig.12 As can be seen from the curve graph, since the cooking device 1000 is being heated, the temperature of the bracket 1034 and the water is not as high as that of the water. Fig.11 Instead of starting with a low value as in , start with a relatively high value.

[0251] The processor 2200 of the heating device 2000 starts at time t 3 To time point t 4 (At t 3 and t 4 t stops sending output power to the cooking appliance 1000 in order to determine whether the cooking appliance 1000 is subjected to idle heating. 3 and t 4 The time length of the interval between the two can be set differently according to various conditions, but can be about 5 seconds. Fig.11 As mentioned above, when t 3 and t 4 As a result of measuring the temperature of the tray 1034 and the water during the interval between t and t, when the tray-water temperature continues to rise, the processor 2200 of the heating device 2000 can determine that the cooking appliance 1000 is subjected to empty heating. 3 and t 4 As a result of measuring the temperatures of the tray 1034 and the water during the interval between, when the tray-water temperature decreases, the processor 2200 of the heating device 2000 can determine that the cooking appliance 1000 is not experiencing empty heating. When determining empty heating, the processor 2200 of the heating device 2000 can determine not only whether the tray-water temperature is increasing or decreasing, but also whether the temperature of the tray 1034 is increasing or decreasing, and when its temperature is increasing, determine that empty heating is occurring, or when its temperature is decreasing, determine that empty heating is not occurring.

[0252] Through Fig.12By measuring the temperature of the bracket 1034 and the water as shown, it can be determined whether the cooking appliance 1000 has undergone empty heating to prevent all the water in the cooking appliance 1000 from evaporating during heating or causing a situation where there is no object to be cooked in the cooking appliance 1000 due to other reasons. When it is determined that the cooking appliance 1000 has undergone empty heating during reheating, the processor 2200 of the heating device 2000 can notify the cooking appliance 1000 of the empty heating, and output information indicating that the cooking appliance 1000 has undergone empty heating in the form of audio or on a display via the output interface 2510 of the heating device 2000. In addition, the processor 2200 of the heating device 2000 can send information indicating that the cooking appliance 1000 has undergone empty heating to the user's mobile device or server. In an embodiment of the present disclosure, the cooking appliance 1000 can also detect by itself whether it has undergone empty heating during reheating.

[0253] Fig.13a The position of a first temperature sensor for detecting the temperature of an object being cooked according to an embodiment of the present disclosure is shown.

[0254] refer to Fig.13a , a smart kettle is shown as an example of a cooking appliance 1000. In order to detect the temperature of water 11 (which is an object being cooked in the cooking appliance 1000), a first temperature sensor 1041 for measuring the temperature of the water 11 is attached to the bottom of the cooking appliance 1000. The bottom surface 10 of the cooking appliance 1000 may include a load for heating the smart kettle via a receiving coil as a part of the cooking appliance 1000, the receiving coil may be included in the upper body of the cooking appliance 1000, and the bottom surface 10 may also be a part of a heating device 2000 capable of transmitting power to the receiving coil of the cooking appliance 1000.

[0255] Fig.13b The position of a first temperature sensor for detecting the temperature of an object being cooked according to an embodiment of the present disclosure is shown.

[0256] refer to Fig.13b , the cooking appliance 1000 is Fig.13a The first temperature sensor 1041 is attached to the side of the inner cylinder of the smart kettle to detect the temperature of the water. The first temperature sensor 1041 can be installed to the side of the inner cylinder of the smart kettle to more accurately measure the internal temperature of the cooking appliance 1000 (or the temperature of the object being cooked in the cooking appliance 1000).

[0257] In the following, reference Fig.13c The structure of the cooking appliance 1000 is described.

[0258] Fig.13cThe structure of a cooking appliance according to an embodiment of the present disclosure is shown.

[0259] refer to Fig.13c , the cooking appliance 1000 is a smart pot. Fig.13d Unlike the coffee dripper shown, the Smart Pot does not have a heating heater.

[0260] refer to Fig.13c , the cooking appliance 1000 may include, but is not limited to, a top cover 1301, an inner / outer seal 1302, a side sensor assembly module 1303, a buzzer assembly module 1304, an inner case 1305, a pickup coil 1306, rubber legs 1307, a body 1308, a screw cover 1309, a guide rubber 1311, a BLE printed board assembly (PBA) assembly (ASM) 1312, a power supply PBA ASM 1313, a sensor leg 1314, and a bottom sensor 1315. These components are described.

[0261] The top cover 1301 forms the exterior of the cooking utensil 1000 and is a component that allows a cooking container (not shown) of an inner pot to be placed. The inner / outer seal 1302 is compressed when the cooking utensil 1000 is assembled to block the water seepage path, thereby enhancing the waterproofness of the cooking utensil 1000.

[0262] The side sensor module 1303 may include a first temperature sensor 1041 (side temperature sensor) for measuring the temperature of a cooking container (not shown), a fixing member for fixing the first temperature sensor 1041, and an elastic member (e.g., a spring) that is compressed and deformed when the cooking container is placed, but is not limited thereto. According to an embodiment of the present disclosure, as Fig.13c As shown, the side sensor module 1303 including the first temperature sensor 1041 may be installed at three locations to improve the accuracy of the side temperature measurement by measuring the temperature on each side of the cooking appliance 1000 .

[0263] The side sensor module 1303 including the first temperature sensor 1041 may be installed through the inner case 1305 to more accurately measure the internal temperature of the inner case 1305. The bottom sensor 1315 may include the second temperature sensor 1042 for measuring the temperature of the bottom surface of the cooking utensil 1000. The bottom sensor 1315 may be assembled to and supported by the sensor legs 1314. The bottom sensor 1315 may detect abnormal overheating of the cooking container.

[0264] The buzzer assembly module 1304 is a module for outputting an alarm when the cooking container (not shown) is overheated. The inner shell 1305 supports the cooking container, and the rubber leg 1307 reduces the impact and prevents slipping when the cooking container is placed. The body 1308 forms the exterior of the smart pot and covers the internal objects, such as the cooking container. In addition, the cooking utensil 1000 may include a handle that prevents heat from escaping to the outside during the cooking operation of the smart pot and can be grasped by the consumer's hand together with the cooking container. The screw cover 1309 covers the screws used for assembly, forms the exterior, and relieves the impact and prevents slipping when the smart pot is mounted on the top plate of the heating device 2000. The guide rubber 1311 acts as a guide to prevent eccentricity when the cooking container is placed in the smart pot, while relieving the impact and preventing slipping. The BLE PBA ASM 1312 can communicate wirelessly with the heating device 2000 to control the output of the heating device 2000 and detect the temperature of the smart pot. The power supply PBA ASM 1313 converts the power received from the pickup coil 1306 into a voltage that can be used by the MCU and the BLE PBA ASM 1312. The sensor legs 1314 are used to reduce shock and prevent slipping when the cooking container is placed in the smart pot.

[0265] As Fig.13c The MCU of the smart pot of the cooking appliance 1000 can determine whether the smart pot is experiencing empty heating based on the bottom temperature of the smart pot detected by the bottom sensor 1315 and the side (or internal) temperature of the smart pot detected by the side sensor module 1303. In an embodiment of the present disclosure, when the heating by the heating device 2000 is stopped, when the change in temperature obtained by subtracting the side temperature of the smart pot from the bottom temperature of the smart pot still has a positive value within a specific time period, the MCU of the smart pot can determine that the smart pot is experiencing empty heating. Alternatively, the processor 2200 of the heating device 2000 can determine empty heating by receiving information about the bottom temperature of the smart pot detected by the bottom sensor 1315 and the side (or internal) temperature of the smart pot detected by the side sensor module 1303 from the BLE PBA ASM 1312 of the smart pot. The method of determining empty heating is the same as the method performed by the MCU of the smart pot.

[0266] Fig.13d A coffee drip filter according to an embodiment of the present disclosure is shown.

[0267] Fig.13d The coffee drip filter 6000 may correspond to the 2-2 type cooking utensil 1000 b - 2 in which the receiving coil 1003 among the cooking utensil 1000 heats the heater 1014 .

[0268] refer to Fig.13dThe coffee drip filter 6000 is divided into: a water heater 1310, which is provided at the upper part for boiling water; and a coffee server 1350, which is provided at the lower part for containing drip coffee. The water heater 1310 may include a heater 1014 and a first temperature sensor 1041 for measuring the temperature of water or the temperature inside the water heater 1310.

[0269] The coffee server 1350 may include a pickup coil 1001, a receiving coil 1003, and a server heater 1014-1. The coffee server 1350 may be made of a borosilicate material, but is not limited thereto. The receiving coil 1003 of the coffee server 1350 may be electrically connected to a receiving coil (not shown) included in the water heater 1310 via a connector 1320. The receiving coil 1003 and the server heater 1014-1 of the coffee server 1350 may be used to keep the contained coffee warm and heat it, and may not be included in the coffee server 1350 according to the specifications of the coffee drip filter 6000. The receiving coil 1003 may be protected from heat by a 200-degree heat-resistant wire. The connector 1320 for connecting the coffee server 1350 to the water heater 1310 may include a server detection sensor 1370, a solenoid valve 1360, and an LED 1380.

[0270] The server detection sensor 1370 determines whether the coffee server 1350 is present, and a time-of-flight (ToF) sensor may be applied. The solenoid valve 1360 may discharge water to fill the water heater 1310 with water when the valve is opened and closed according to a control signal, and a direct-acting solenoid valve may be used. When the coffee drip filter 6000 is in operation, the LED 1380 may emit light to indicate that the coffee drip filter is in operation.

[0271] The coffee drip filter 6000 may include a PCB (not shown), and the PCB may be included in the coffee server 1350 or provided in the water heater 1310 or the connector 1320. The PCB may receive power via the pickup coil 1001, and in an embodiment of the present disclosure, an MCU as a type of processor in the PCB may determine whether empty heating occurs through a first temperature sensor 1041 for measuring the temperature of water or the temperature inside the water heater 1310 and a second temperature sensor 1042 attached to the heater 1014.

[0272] Fig.18 is a flowchart of a method for identifying a position of a cooking appliance performed by a heating device according to an embodiment of the present disclosure.

[0273] In operation S1410 , according to an embodiment of the present disclosure, the heating apparatus 2000 may detect a first wireless communication signal transmitted from the cooking appliance 1000 located on a top plate of the heating apparatus 2000 via the communication interface 2300 of the heating apparatus 2000 .

[0274] According to an embodiment of the present disclosure, when operating in the small appliance detection mode, the heating device 2000 may transmit a preset first level (e.g., 100W to 300W) of power to the cooking appliance 1000 so as to drive the communication interface 1030 of the cooking appliance 1000. The small appliance detection mode is a mode for detecting a second type cooking appliance 1000b capable of communicating with the heating device 2000.

[0275] When the communication interface 1030 of the cooking appliance 1000 is driven by the power sent from the heating device 2000, the cooking appliance 1000 may send a first wireless communication signal. For example, the cooking appliance 1000 may broadcast the first wireless communication signal including the first packet at regular intervals by using short-range wireless communication (e.g., Bluetooth, BLE, etc.). The heating device 2000 may receive the first wireless communication signal sent from the communication interface 1030 of the cooking appliance 1000. The first packet included in the first wireless communication signal may include identification information about the cooking appliance 1000, but is not limited thereto. At the same time, the first packet included in the first wireless communication signal may not include location information of the cooking appliance 1000 (e.g., information about the cooking zone where the cooking appliance 1000 is currently located).

[0276] In operation S1420, according to an embodiment of the present disclosure, when a first wireless communication signal is detected, the heating device 2000 may control the inverter circuit 2113 so that the plurality of working coils 2120 respectively corresponding to the plurality of cooking zones generate magnetic fields according to a plurality of different power transmission modes.

[0277] According to an embodiment of the present disclosure, the first packet included in the first wireless communication signal transmitted from the cooking appliance 1000 may not include the location information of the cooking appliance 1000. In this case, the heating device 2000 may not accurately identify on which cooking zone the cooking appliance 1000 is located. Therefore, in order to identify the location of the cooking appliance 1000, the heating device 2000 may control the inverter circuit 2113 to output power according to different power transmission modes of each cooking zone. For example, when the heating device 2000 includes three cooking zones (i.e., the first cooking zone to the third cooking zone), the heating device 2000 may control the inverter circuit 2113 to output power according to the first power transmission mode via the first working coil corresponding to the first cooking zone, output power according to the second power transmission mode via the second working coil corresponding to the second cooking zone, and output power according to the third power transmission mode via the third working coil corresponding to the third cooking zone.

[0278] The plurality of power transmission modes may be respectively differently set based on at least one of a duration of a power transmission interval, a duration of a power cutoff interval, or a power level.

[0279] Fig.15 is a diagram illustrating a power transmission mode according to an embodiment of the present disclosure.

[0280] refer to Fig.15 , a plurality of power transmission modes may be differently set according to the duration of the power transmission interval T1 and the duration of the power cut-off interval T2. For example, in the first power transmission mode 1510 corresponding to the first cooking zone, the power transmission interval T1 has a duration of 250 milliseconds (ms), and the power cut-off interval T2 has a duration of 50 ms. In other words, in the first power transmission mode 1510, a pattern in which power is transmitted for 250 ms and then the power is cut off for 50 ms may be repeated. In the second power transmission mode 1520 corresponding to the second cooking zone, the power transmission interval T1 has a duration of 200 ms, and the power cut-off interval T2 has a duration of 100 ms. For example, according to the second power transmission mode 1520, a pattern in which power is transmitted for 200 ms and then the power is cut off for 100 ms may be repeated.

[0281] Therefore, according to an embodiment of the present disclosure, when the heating device 2000 receives a first wireless communication signal from the cooking appliance 1000 and operates in a mode for determining the cooking zone in which the cooking appliance 1000 is located (hereinafter referred to as a cooking zone determination mode), the heating device 2000 can control the inverter circuit 2113 to supply AC current to the first working coil corresponding to the first cooking zone for 250ms and then cut off the supply of AC current for 50ms according to the first power transmission mode 1510, and control the inverter circuit 2113 to supply AC current to the second working coil corresponding to the second cooking zone for 200ms and then cut off the supply of AC current for 100ms according to the second power transmission mode 1520.

[0282] In this case, the cooking appliance 1000 may analyze the voltage output from the rectifier to detect one of a plurality of power transmission modes. Fig.15 , when the cooking appliance 1000 is located on the first cooking zone, the cooking appliance 1000 may analyze the first voltage 1511 output from the rectifier to detect the first power transmission mode 1510, under which the duration of the power transmission interval T1 is 250 ms and the duration of the power cut-off interval T2 is 50 ms. In addition, the cooking appliance 1000 may determine that the cooking appliance 1000 is located on the first cooking zone by identifying the cooking zone outputting the first power transmission mode 1510 as the first cooking zone based on the information about the plurality of pre-stored power transmission modes output from the heating device 2000. In addition, when the cooking appliance 1000 is located on the second cooking zone, the cooking appliance 1000 may analyze the second voltage 1521 output from the rectifier to detect the second power transmission mode 1520, under which the duration of the power transmission interval T1 is 200 ms and the duration of the power cut-off interval T2 is 100 ms. In addition, the cooking appliance 1000 may determine that the cooking appliance 1000 is located on the second cooking zone by identifying the cooking zone outputting the second power transmission mode 1520 as the second cooking zone based on information about a plurality of pre-stored power transmission modes from the heating device 2000 .

[0283] In addition, according to an embodiment of the present disclosure, the cooking appliance 1000 can identify the cooking zone in which the cooking appliance 1000 is located based only on the duration of the power cutoff interval T2. When the power cutoff interval has a duration of 50 ms as a result of analyzing the power output from the rectifier, the cooking appliance 1000 can determine that it is located on the first cooking zone that outputs the first power transmission mode 1510, and when the power cutoff interval has a duration of 100 ms, the cooking appliance 1000 can determine that it is located on the second cooking zone that outputs the second power transmission mode 1520.

[0284] According to an embodiment of the present disclosure, a plurality of power transmission modes may be set in various ways based on the duration of the power transmission interval, the duration of the power cutoff interval, and the power level.

[0285] Fig.16 is a diagram illustrating a power transmission mode according to an embodiment of the present disclosure.

[0286] refer to Fig.16 , the first power transmission mode 1610 corresponding to the first cooking zone may be a mode in which power is transmitted at the first level P1 for 2 seconds and then cut off for 2 seconds. The second power transmission mode 1620 may be a mode in which power is transmitted at the first level P1 for 2 seconds and then cut off for 1 second. The third power transmission mode 1630 may be a mode in which power is transmitted at the first level P1 for 4 seconds and then cut off for 1 second, and power is transmitted at the first level P1 again for 1 second and then cut off for 1 second. The fourth power transmission mode 1640 may be a mode in which power is transmitted at the first level P1 for 2 seconds and then cut off for 2 seconds, and power is transmitted at the second level P2 again for 2 seconds and then cut off for 2 seconds.

[0287] In addition, according to an embodiment of the present disclosure, the power transmitted to the cooking appliance 1000 according to the plurality of power transmission modes may be high enough to drive the communication interface 1030 of the cooking appliance 1000. Therefore, according to an embodiment of the present disclosure, when the cooking appliance 1000 determines that it is located on the first cooking zone based on the detected first power transmission mode, the cooking appliance 1000 may transmit a second wireless communication signal including information about the first cooking zone, determine whether the cooking appliance 1000 on the first cooking zone is subjected to empty heating, and notify the user whether the cooking appliance 1000 on the first cooking zone is subjected to empty heating. The notification may be made using at least one of a notification through a display or a notification through an audio output. In addition, the cooking appliance 1000 may broadcast a second packet including information about the first cooking zone by using short-range wireless communication.

[0288] Reference again Fig.14 , in operation S1430, according to an embodiment of the present disclosure, the heating device 2000 may receive a second wireless communication signal from the cooking appliance 1000, the second wireless communication signal including information about a first cooking zone corresponding to a first power transmission mode detected at the position of the cooking appliance 1000 among a plurality of power transmission modes and identification information about the cooking appliance 1000.

[0289] For example, the heating device 2000 may receive a second packet from the cooking appliance via short-range wireless communication, the second packet including information about the first cooking zone where the cooking appliance 1000 is located and identification information about the cooking appliance 1000. The information about the first cooking zone where the cooking appliance 1000 is located may include identification information indicating the first cooking zone among the plurality of cooking zones (e.g., the first heating zone, the upper left heating zone, etc.), and may also include coordinate information of the first cooking zone. The identification information about the cooking appliance 1000 is unique information for identifying the cooking appliance 1000, and may include, but is not limited to, at least one of a MAC address, a model name, appliance type information (e.g., an IH type ID, a heater type ID, and a motor type ID), manufacturer information (e.g., a manufacturer ID), a serial number, or a manufacturing date. According to an embodiment of the present disclosure, the identification information about the cooking appliance 1000 may be represented as a series of identification numbers, or a combination of numbers and letters.

[0290] In addition, the second packet included in the second wireless communication signal may also include communication connection information. In the case where the cooking appliance 1000 has been previously paired with the heating device 2000, the communication connection information may include pairing information (e.g., authentication key, etc.). "Pairing" may refer to a process for verifying a password, identification information, security information, authentication information, etc., which is specified for a communication connection between the cooking appliance 1000 and the heating device 2000, both of which support, for example, Bluetooth.

[0291] According to an embodiment of the present disclosure, by receiving a second wireless communication signal including information about the first cooking zone where the cooking appliance 1000 is located and identification information about the cooking appliance 1000 from the cooking appliance 1000, the heating device 2000 can identify the type of the cooking appliance 1000 and on which cooking zone the cooking appliance 1000 is located.

[0292] In addition, when a plurality of cooking utensils are located on a plurality of cooking zones, the heating device 2000 may receive identification information and location information of each cooking utensils from the corresponding cooking utensils. For example, when a coffee machine is located on a first cooking zone, the heating device 2000 may receive information about the first cooking zone and identification information about the coffee machine from the coffee machine, and when a toaster is located on a second cooking zone, the heating device 2000 may receive information about the second cooking zone and identification information about the toaster from the toaster. In this case, the heating device 2000 may determine that the coffee machine is located on the first cooking zone and the toaster is located on the second cooking zone.

[0293] In operation S1440, according to an embodiment of the present disclosure, the heating device 2000 can output information about a first cooking zone where the cooking appliance 1000 is located among multiple cooking zones (hereinafter, also referred to as position information of the cooking appliance 1000) and identification information about the cooking appliance 1000 based on the second wireless communication signal.

[0294] According to an embodiment of the present disclosure, the heating device 2000 may display identification information about the cooking appliance 1000 in the form of text or image on the display. For example, the heating device 2000 may display text indicating the name or type of the cooking appliance 1000, or display an icon image of the first cooking appliance 1000 and the text. According to an embodiment of the present disclosure, the heating device 2000 may output identification information about the cooking appliance 1000 in the form of voice via an audio output interface.

[0295] Furthermore, according to an embodiment of the present disclosure, the heating device 2000 may indicate that the cooking appliance 1000 is located on the first cooking zone by displaying identification information about the cooking appliance 1000 at a position where the power level of the first cooking zone is displayed on the GUI. In addition, when the cooking appliance 1000 undergoes empty heating, the heating device 2000 may also display information about whether empty heating is occurring and identification information about the cooking appliance 1000 at a position where the power level of the first cooking zone is displayed on the GUI by using a special display method (e.g., by displaying an image corresponding to the identification information in a flashing manner, displaying an image corresponding to the identification information in a different color, or displaying a text "experiences empty heating" around an image corresponding to the identification information). For example, when the cooking appliance 1000 is a smart pot, and the smart pot is placed on the lower left cooking zone and undergoes empty heating, the heating device 2000 may indicate that the smart pot undergoes empty heating by displaying an icon image of the smart pot at the lower left of the GUI in a flashing manner. According to an embodiment of the present disclosure, the heating device 2000 can output information about the first cooking zone where the cooking appliance 1000 is located (location information of the cooking appliance 1000) and information about whether the cooking appliance 1000 is experiencing empty heating (for example, "the smart pot on the first cooking zone experiences empty heating") in the form of voice via an audio output interface.

[0296] In the case of using a general induction stove, since the user needs to identify the type of the cooking utensil 1000 and the position of the heating zone where the cooking utensil 1000 is located, and input the type of the cooking utensil 1000 via the manipulation interface for the corresponding heating zone and then input a specific operation, user convenience is reduced. On the other hand, according to an embodiment of the present disclosure, when the user places the cooking utensil 1000 on any cooking zone and presses the power button, the heating device 2000 autonomously identifies and displays the identification information about the cooking utensil 1000 and the position of the cooking zone where the cooking utensil 1000 is located, thereby improving user convenience. In addition, according to an embodiment of the present disclosure, even if the user places the cooking utensil 1000 on the first cooking zone or moves the cooking utensil 1000 placed on the first cooking zone to the second cooking zone when power is turned on, the heating device 2000 can also autonomously identify and display the identification information about the cooking utensil 1000 and the position of the cooking zone where the cooking utensil 1000 is located. In addition, when the user starts heating the cooking appliance 1000, but the cooking appliance 1000 undergoes empty heating without an object to be cooked in the cooking appliance 1000, the heating device 2000 may determine that the cooking appliance 1000 undergoes empty heating and output information indicating empty heating. In addition, based on the identification information about the cooking appliance 1000, the position of the cooking zone where the cooking appliance 1000 is located, and the determination of whether the cooking appliance 1000 undergoes empty heating, the heating device 2000 may output the type of the cooking appliance 1000, the position of the cooking zone where the cooking appliance 1000 is located, and whether the cooking appliance 1000 undergoes empty heating all via the output interface 2510.

[0297] Although referenced Figures 14 to 16 The embodiments of the present disclosure of identifying the cooking zone in which the cooking appliance 1000 is located and the cooking appliance 1000 according to the plurality of power transmission modes are described, but with reference to Figures 14 to 16 The operations in the described embodiments of the present disclosure may be merely optional and may not be considered necessary when determining empty heating.

[0298] Fig.17a is a flowchart of a method of determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure.

[0299] In operation S1702a, the heating device 2000 receives a user input. The user input is a user input for heating the cooking appliance 1000, and the corresponding user input may also include an input regarding a power level at which the cooking appliance is to be heated. When the user does not specify a power level at which the cooking appliance is to be heated, heating may be started at a default power level. In an embodiment of the present disclosure, the operation of receiving a user input in operation S1702a may be as follows: Fig.18 The operation S1810 is performed before.

[0300] In operation S1704a, the heating device 2000 heats the cooking appliance 1000 via the transmission coil with power determined for empty heating (which is not power corresponding to the user input) during the first time period. In operation S1705a, when the pickup coil 1001 activates the PCB 1005 of the cooking appliance 1000 via power received from the heating device 2000, the cooking appliance 1000 obtains information about a temperature detected by a first temperature sensor 1041 for detecting an object being cooked (e.g., water contained in the cooking appliance 1000) or an internal temperature of the cooking appliance 1000, and a temperature detected by a second temperature sensor 1042 attached to the bracket 1034 to measure the temperature of the heater 1014, and transmits the information about the temperatures to the heating device 2000. The length of the first time period may vary according to various conditions, but may be about 10 seconds.

[0301] Unless there is a special reason to stop the temperature measurement, the cooking appliance 1000 may continue to detect the temperature by the first temperature sensor 1041 and the second temperature sensor 1042 while the PCB 1005 of the cooking appliance 1000 is activated.

[0302] In operation S1706a, the heating device 2000 stops heating the cooking appliance 1000 for the second time period, and continues to obtain information about the temperatures detected by the first temperature sensor 1041 and the second temperature sensor 1042 during the second time period. In operation S1708a, the heating device 2000 determines whether the cooking appliance 1000 is subjected to idle heating based on the information about the internal temperature of the cooking appliance 1000 detected by the first temperature sensor 1041 and the information about the temperature of the heater 1014 detected by the second temperature sensor 1042 attached to the bracket 1034.

[0303] In order to save resources, the heating device 2000 may selectively obtain such temperature information only within the second time period or only within a time period including a specific time (2 seconds) immediately before the start of the second time period and the second time period.

[0304] When the empty heating is determined, the processor 2200 of the heating device 2000 may determine whether the cooking appliance 1000 is subjected to the empty heating based on the relationship between the temperature of the heater 1014 and the internal temperature of the cooking appliance 1000 (the temperature of the object being cooked in the cooking appliance 1000). In an embodiment of the present disclosure, when the value obtained by subtracting the internal temperature of the cooking appliance 1000 from the temperature of the heater 1014 continues to increase in the second time period, the heating device 2000 may determine that the cooking appliance 1000 is subjected to the empty heating. In an embodiment of the present disclosure, when the temperature of the heater 1014 continues to increase in the second time period, the processor 2200 may determine that the cooking appliance 1000 is subjected to the empty heating. In an embodiment of the present disclosure, when the slope corresponding to the value obtained by subtracting the internal temperature of the cooking appliance 1000 from the temperature of the heater 1014 remains positive (+) in the second time period, the processor 2200 may determine that the cooking appliance 1000 is subjected to the empty heating. When there is an object being cooked, such as water in the cooking appliance 1000, the internal temperature of the cooking appliance 1000 may be the temperature of the water, and when there is no water in the cooking appliance 1000, the internal temperature of the cooking appliance 1000 may simply be the internal temperature of the cooking appliance 1000. In an embodiment of the present disclosure, when a slope corresponding to a value obtained by subtracting the internal temperature of the cooking appliance 1000 from the temperature of the heater 1014 is greater than a predetermined value during the second time period, the processor 2200 may determine that the cooking appliance 1000 undergoes empty heating.

[0305] Fig.17b is a flowchart of a method of determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure.

[0306] In operation S1701b, when a user input is received, the heating device 2000 is ready to start heating the cooking appliance 1000. The user can start the operation of the heating device 2000 by pressing a button for turning on the power of the heating device 2000. In response to receiving the user input, in operation S1702b, the heating device 2000 can supply power to the pickup coil 1001 of the cooking appliance 1000 via the transmission coil 2120. In operation S1703b, the power received via the pickup coil 1001 is supplied to the PCB 1005 of the cooking appliance 1000 to activate the power supply 1010, the controller 1020, the communication interface 1030, and the sensor unit 1040 included in the PCB 1005. When the power of the communication module 1030 included in the PCB 1005 is turned on, the communication interface 1030 can be activated. In operation S1704b, the cooking appliance 1000 sends identification information about the cooking appliance 1000 to the heating device 2000. The identification information about the cooking appliance 1000 may include at least one of the following: the type of the cooking appliance 1000 (coffee drip filter, smart pot, frying pan, smart kettle, etc.), capacity, capacity of the cooking appliance 1000, heating type (whether the cooking appliance 1000 is an induction heating cooking appliance or a heater heating cooking appliance), MAC address, or information about whether the cooking appliance 1000 has a temperature sensor attached thereto. In this case, the heating device 2000 may also determine the cooking zone where the cooking appliance 1000 is located and obtain information about the cooking zone. In operation S1705b, short-range communication between the heating device 2000 and the cooking appliance 1000 may be established. Short-range communication may include, but is not limited to, Bluetooth communication, BLE communication, NFC, WLAN (or Wi-Fi) communication, Zigbee communication, IrDA communication, WFD communication, UWB communication, Ant+ communication, etc.

[0307] In operation S1706b, at least some of the received identification information about the cooking appliance 1000 may be displayed on the output interface 2510 such as a display of the heating device 2000. In addition, the heating device 2000 may display the cooking zone where the cooking appliance 1000 is located and the identification information about the cooking appliance 1000.

[0308] In operation S1707b, the user inputs a heating operation to the heating device 2000. For example, the user may input a heating operation so that the heating device 2000, which is capable of heating at levels 1 to 10, heats the cooking utensil at level 8. The user may also select recipe information from the heating device 2000 to which a cooking recipe may be input. For example, the user may select recipe information suitable for the object to be currently cooked and the cooking utensil 1000 (e.g., cooking temperature: 180° C. to 190° C. and time: 30 to 35 seconds). In this case, when the user presses the start button, the heating device 2000 may cook the object to be cooked in the cooking utensil 1000 according to the recipe information (e.g., cooking temperature: 180° C. to 190° C. and time: 30 to 35 seconds).

[0309] In operation S1708b, the heating device 2000 determines whether the cooking appliance 1000 is a cooking appliance capable of determining empty heating or a cooking appliance that requires determination of empty heating based on the received identification information about the cooking appliance 1000. For example, when the identification information about the cooking appliance 1000 includes information indicating that the cooking appliance 1000 does not have a temperature sensor, the heating device 2000 may not determine whether empty heating is occurring. Alternatively, when the cooking appliance 1000 is a first type cooking appliance 1000a using an induction heating method, the heating device 2000 may not determine whether empty heating is occurring. When it is not determined whether empty heating is occurring, in operation S1717b, the heating device 2000 supplies power to the cooking appliance 1000 based on the heating operation and the recipe input by the user in operation S1707b.

[0310] When it is determined in operation S1708b that the cooking appliance 1000 is a cooking appliance that requires determination regarding empty heating based on the received identification information regarding the cooking appliance 1000, in operation S1710b, the heating device 2000 may supply power for empty heating determination to the cooking appliance 1000 within a predetermined period of time. For example, the heating device 2000 may supply 800W of power for 10 seconds, and in operation S1711b, stop supplying power for 5 seconds. In this case, in operations S1709b and S1712b, the cooking appliance 1000 continuously measures the temperature of water (or the inside of the cooking appliance 1000) in the cooking appliance 1000 and the temperature of the bracket 1034 in both cases when the cooking appliance 1000 itself is heated (S1710b) and when heating is stopped (S1711b), and obtains temperature measurement values.

[0311] In operation S1713b, the cooking appliance 1000 determines whether the cooking appliance 1000 itself undergoes empty heating based on the obtained temperature information. In an embodiment of the present disclosure, the cooking appliance 1000 may receive information about a time interval during which power for empty heating determination is supplied from the heating device 2000, a time interval during which power is cut off, and a magnitude of power for empty heating determination from the heating device 2000 via the communication interface 1030. The cooking appliance 1000 may learn at what point in time the heating device 2000 outputs power for empty heating determination and at what point in time the heating device 2000 stops heating based on the received information. The cooking appliance 1000 may also learn the length of time during which the heating device 2000 outputs power for empty heating determination and stops heating. The cooking appliance 1000 may determine and detect empty heating based on the information obtained from the heating device 2000 and the temperature information obtained from the sensor unit 1040. In an embodiment of the present disclosure, when the value obtained by subtracting the internal temperature of the cooking appliance 1000 from the temperature of the bracket 1034 continues to increase during the period when the heating device 2000 stops heating, the cooking appliance 1000 may determine that idle heating is occurring. Alternatively, when the slope corresponding to the value obtained by subtracting the internal temperature of the cooking appliance 1000 from the temperature of the bracket 1034 has a positive value, the cooking appliance 1000 may determine that idle heating is occurring.

[0312] In operation S1714b, the cooking appliance 1000 may transmit the result of determining whether idle heating is occurring to the heating device 2000 via the communication interface 1030.

[0313] In operation S1715b, the heating device 2000 may identify whether the cooking appliance 1000 is subjected to empty heating according to the determination result received from the cooking appliance 1000, or may independently determine whether the cooking appliance 1000 is subjected to empty heating based on the temperature information received from the cooking appliance 1000 (i.e., information about the temperature measured by the first temperature sensor 1041 and the second temperature sensor 1042). When it is determined that the cooking appliance 1000 is subjected to empty heating, in operation S1716b, the heating device 2000 notifies the user of the empty heating. In this case, a notification indicating empty heating may be made via the output interface 2510 of the heating device 2000. In an embodiment of the present disclosure, when the heating device 2000 is capable of being connected to a server or a user's mobile device via communication, the heating device 2000 may notify the server or the user's mobile device of empty heating. Notification of empty heating may be made via sound, display, smart phone notification, etc.

[0314] In operation S1717b, when it is determined that the cooking appliance 1000 has not undergone empty heating based on the result of the determination about empty heating received from the cooking appliance 1000, or when the heating device 2000 determines that the cooking appliance 1000 has not undergone empty heating as a result of the heating device 2000 independently determining whether the cooking appliance 1000 has undergone empty heating based on the temperature information received from the cooking appliance 1000 (i.e., information about the temperature measured by the first temperature sensor 1041 and the second temperature sensor 1042), the heating device 2000 can supply power corresponding to the user input (for example, 1400 W corresponding to the user input heating level) to the cooking appliance 1000.

[0315] Fig.17c is a flowchart of a method of determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure.

[0316] In operation S1701c, when a user input is received, the heating device 2000 is ready to start heating the cooking appliance 1000. The user may start the operation of the heating device 2000 by pressing a button for turning on the power of the heating device 2000. In response to receiving the user input, in operation S1702c, the heating device 2000 may supply power to the pickup coil 1001 of the cooking appliance 1000 via the transmission coil 2120. In operation S1703c, the power received via the pickup coil 1001 is supplied to the PCB 1005 of the cooking appliance 1000 to activate the power supply 1010, the controller 1020, the communication interface 1030, and the sensor unit 1040 included in the PCB 1005. When the power of the communication module 1030 included in the PCB 1005 is turned on, the communication interface 1030 may be activated. In operation S1704c, the cooking appliance 1000 sends identification information about the cooking appliance 1000 to the heating device 2000. The identification information about the cooking appliance 1000 may include at least one of the following: the type of the cooking appliance 1000 (coffee drip filter, smart pot, frying pan, smart kettle, etc.), capacity, capacity of the cooking appliance 1000, heating type (whether the cooking appliance 1000 is an induction heating cooking appliance or a heater heating cooking appliance), MAC address, or information about whether the cooking appliance 1000 has a temperature sensor attached thereto. In this case, the heating device 2000 may also determine the cooking zone where the cooking appliance 1000 is located and obtain information about the cooking zone. In operation S1705c, short-range communication between the heating device 2000 and the cooking appliance 1000 may be established. Short-range communication may include, but is not limited to, Bluetooth communication, BLE communication, NFC, WLAN (or Wi-Fi) communication, Zigbee communication, IrDA communication, WFD communication, UWB communication, Ant communication, etc.

[0317] In operation S1706c, at least some of the received identification information about the cooking appliance 1000 may be displayed on the output interface 2510, such as a display of the heating device 2000. In addition, in an embodiment of the present disclosure, the heating device 2000 may display the cooking zone where the cooking appliance 1000 is located and the identification information about the cooking appliance 1000.

[0318] In operation S1707c, the user inputs a heating operation to the heating device 2000. For example, the user may input a heating operation so that the heating device 2000, which is capable of heating at levels 1 to 10, heats the cooking utensil at level 6. The user may also select recipe information from the heating device 2000 to which a cooking recipe may be input. For example, the user may select recipe information suitable for the object to be currently cooked and the cooking utensil 1000 (e.g., cooking temperature: 180° C. to 190° C. and time: 30 to 35 seconds). In this case, when the user presses the start button, the heating device 2000 may cook the object to be cooked in the cooking utensil 1000 according to the recipe information (e.g., cooking temperature: 180° C. to 190° C. and time: 30 to 35 seconds).

[0319] In operation S1708 c , the heating device 2000 may measure the temperature of the bottom surface of the cooking appliance 1000 via a temperature sensor on the top plate of the heating device 2000 .

[0320] In operation S1709c, the cooking appliance 1000 may measure the side temperature of the cooking appliance 1000 via the first temperature sensor 1041. The first temperature sensor 1041 may indirectly measure the internal temperature of the cooking appliance 1000 by measuring the side temperature of the cooking appliance 1000. In an embodiment of the present disclosure, the first temperature sensor 1041 may be connected to the inside of the cooking appliance 1000 through the side of the cooking appliance 1000 to directly measure the internal temperature of the cooking appliance 1000.

[0321] In operation S1710 c , the cooking appliance 1000 may transmit the measured value of the side temperature or the internal temperature of the cooking appliance 1000 to the heating device 2000 via the communication interface 1030 .

[0322] In operation S1711c, the heating device 2000 outputs power (e.g., 800 W) for empty heating determination to the cooking appliance 1000 within a predetermined time period (e.g., 10 seconds). The heating device 2000 may transmit information about a specific time period (e.g., 10 seconds) during which the power (e.g., 800 W) for empty heating determination is output to the cooking appliance 1000.

[0323] When the power (e.g., 800 W) for the empty heating determination is output for a certain period of time (e.g., 10 seconds), the heating device 2000 may measure the temperature of the bottom surface of the cooking appliance 1000 via the temperature sensor on the top plate of the heating device 2000 in operation S1712c, and measure the side temperature or the internal temperature of the cooking appliance 1000 via the first temperature sensor 1041 in operation S1713c. Then, the cooking appliance 1000 may transmit the measured value of the side temperature or the internal temperature of the cooking appliance 1000 to the heating device 2000 via the communication interface 1030 in operation S1714c.

[0324] In operation S1715c, the heating device 2000 stops heating for a predetermined period of time (e.g., 5 seconds) to determine whether idle heating is occurring. When the heating is stopped for a specific period of time, in operation S1716c, the heating device 2000 may measure the temperature of the bottom surface of the cooking utensil 1000 via the temperature sensor on the top plate of the heating device 2000, and in operation S1717c, measure the side temperature or the internal temperature of the cooking utensil 1000 via the first temperature sensor 1041. Then, in operation S1718c, the cooking utensil 1000 may send the measured value of the side temperature or the internal temperature of the cooking utensil 1000 to the heating device 2000 via the communication interface 1030.

[0325] In operation S1719c, the heating device 2000 may determine whether the cooking device 1000 is subjected to empty heating based on the temperature of the bottom surface of the cooking device 1000 and the side temperature or the internal temperature of the cooking device 1000. In an embodiment of the present disclosure, when the temperature obtained by subtracting the side temperature or the internal temperature of the cooking device 1000 from the temperature of the bottom surface of the cooking device 1000 continues to rise within a specific time period when the heating is stopped, the heating device 2000 determines that the cooking device 1000 is subjected to empty heating, or conversely, when a period of temperature decrease obtained by subtracting the side temperature or the internal temperature of the cooking device 1000 from the temperature of the bottom surface of the cooking device 1000 occurs within the specific time period when the heating is stopped, the heating device 2000 determines that the cooking device 1000 is not subjected to empty heating.

[0326] In operation S1720c, the heating device 2000 may transmit the result of determining whether the cooking appliance 1000 undergoes empty heating to the cooking appliance 1000 via the communication interface 2300. Specifically, when the heating device 2000 does not need to notify the cooking appliance 1000 of the result of the determination regarding empty heating, operation S1720c may be omitted.

[0327] When it is determined based on the result of the determination in operation S1721c that the cooking appliance 1000 is not subjected to empty heating, in operation S1722c, the heating device 2000 supplies power (e.g., 1400W) corresponding to the user input to the cooking appliance 1000, otherwise when it is determined that the cooking appliance 1000 is subjected to empty heating, in operation S1723c, the heating device 2000 notifies the user of empty heating. In this case, the notification of empty heating can be made via the output interface 2510 of the heating device 2000. In an embodiment of the present disclosure, when the heating device 2000 is capable of being connected to a server or a user's mobile device via communication, the heating device 2000 can notify the server or the user's mobile device that the cooking appliance 1000 is subjected to empty heating. The notification of empty heating can be made via sound, display, smart phone notification, etc.

[0328] Fig.17d is a flowchart of a method of determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure.

[0329] In operation S1701d, when a user input is received, the heating device 2000 is ready to start heating the cooking appliance 1000. The user can start the operation of the heating device 2000 by pressing a button for turning on the power of the heating device 2000. In response to receiving the user input, in operation S1702d, the heating device 2000 can supply power to the pickup coil 1001 of the cooking appliance 1000 via the transmission coil 2120. In operation S1703d, the power received via the pickup coil 1001 is supplied to the PCB 1005 of the cooking appliance 1000. The power supply 1010, the controller 1020, the communication interface 1030, and the sensor unit 1040 included in the PCB 1005 are activated by the supplied power. When the power of the communication module 1030 included in the PCB 1005 is turned on, the communication interface 1030 can be activated. In operation S1704d, the cooking appliance 1000 sends identification information about the cooking appliance 1000 to the heating device 2000. The identification information about the cooking appliance 1000 may include at least one of the following: the type of the cooking appliance 1000 (coffee drip filter, smart pot, frying pan, smart kettle, etc.), capacity, capacity of the cooking appliance 1000, heating type (whether the cooking appliance 1000 is an induction heating cooking appliance or a heater heating cooking appliance), MAC address, or information about whether the cooking appliance 1000 has a temperature sensor attached thereto. In this case, the heating device 2000 may also determine the cooking zone where the cooking appliance 1000 is located and obtain information about the cooking zone. In operation S1705d, short-range communication between the heating device 2000 and the cooking appliance 1000 may be established. Short-range communication may include, but is not limited to, Bluetooth communication, BLE communication, NFC, WLAN (or Wi-Fi) communication, Zigbee communication, IrDA communication, WFD communication, UWB communication, Ant+ communication, etc.

[0330] In operation S1706d, at least some of the received identification information about the cooking appliance 1000 may be displayed on the output interface 2510, such as a display of the heating device 2000. In addition, in an embodiment of the present disclosure, the heating device 2000 may display the cooking zone where the cooking appliance 1000 is located and the identification information about the cooking appliance 1000.

[0331] In operation S1707d, the user inputs a heating operation to the heating device 2000. For example, the user may input a heating operation so that the heating device 2000, which is capable of heating at levels 1 to 10, heats the cooking utensil at level 7. When the heating device 2000 is a device to which a cooking recipe may be input, the user may also select recipe information. For example, the user may select recipe information suitable for the object to be currently cooked and the cooking utensil 1000 (e.g., cooking temperature: 180°C to 190°C and time: 30 to 35 seconds). In this case, when the user presses the start button, the heating device 2000 may cook the object to be cooked in the cooking utensil 1000 according to the recipe information (e.g., cooking temperature: 180°C to 190°C and time: 30 to 35 seconds).

[0332] In operation S1708 d , the heating device 2000 may measure the temperature of the bottom surface of the cooking appliance 1000 via a temperature sensor on the top plate of the heating device 2000 .

[0333] In operation S1709d, the cooking appliance 1000 may measure the side temperature of the cooking appliance 1000 via the first temperature sensor 1041. The first temperature sensor 1041 may indirectly measure the internal temperature of the cooking appliance 1000 by measuring the side temperature of the cooking appliance 1000. In an embodiment of the present disclosure, the first temperature sensor 1041 may be connected to the inside of the cooking appliance 1000 through the side of the cooking appliance 1000 to directly measure the internal temperature of the cooking appliance 1000.

[0334] In operation S1710d, the cooking appliance 1000 may transmit the measured value of the side temperature or the internal temperature of the cooking appliance 1000 to the heating device 2000 via the communication interface 1030. In operation S1711d, the heating device 2000 outputs power (e.g., 800 W) for empty heating determination to the cooking appliance 1000 within a predetermined time period (e.g., 10 seconds). In an embodiment of the present disclosure, the heating device 2000 may transmit information about the magnitude of the power for empty heating determination and a specific time period during which the power for empty heating determination is output.

[0335] When the power (e.g., 800 W) for the empty heating determination is output for a certain period of time (e.g., 10 seconds), the heating device 2000 may measure the temperature of the bottom surface of the cooking appliance 1000 via the temperature sensor on the top plate of the heating device 2000 in operation S1712d, and measure the side temperature or the internal temperature of the cooking appliance 1000 via the first temperature sensor 1041 in operation S1713d. Then, the cooking appliance 1000 may transmit the measured value of the side temperature or the internal temperature of the cooking appliance 1000 to the heating device 2000 via the communication interface 1030 in operation S1714d.

[0336] In operation S1715d, the heating device 2000 stops heating for a predetermined period of time (e.g., 5 seconds) to determine whether empty heating is occurring. When the heating is stopped for a specific period of time, in operation S1716d, the heating device 2000 may measure the temperature of the bottom surface of the cooking utensil 1000 via a temperature sensor on the top plate of the heating device 2000, and in operation S1717d, the measured temperature of the bottom surface is sent to the cooking utensil 1000. In addition, when the heating by the heating device 2000 is stopped, the cooking utensil 1000 may measure the side temperature or the internal temperature of the cooking utensil 1000 via the first temperature sensor 1041. In operation S1718d, the cooking utensil 1000 may determine whether the cooking utensil 1000 is undergoing empty heating based on the side temperature or the internal temperature of the cooking utensil 1000 and the temperature of the bottom surface of the cooking utensil 1000 received from the heating device 2000. In operation S1723d, when the cooking appliance 1000 determines that the cooking appliance 1000 undergoes empty heating, the cooking appliance 1000 stops heating via the relay. In an embodiment of the present disclosure, when a temperature obtained by subtracting the side temperature or the internal temperature of the cooking appliance 1000 from the temperature of the bottom surface of the cooking appliance 1000 continues to rise within a specific time period during which heating is stopped, the cooking appliance 1000 determines that the cooking appliance 1000 undergoes empty heating, or conversely, when a period of temperature decrease obtained by subtracting the side temperature or the internal temperature of the cooking appliance 1000 from the temperature of the bottom surface of the cooking appliance 1000 occurs within a specific time period during which heating is stopped, the cooking appliance 1000 determines that the cooking appliance 1000 does not undergo empty heating.

[0337] In operation S1719d, the cooking appliance 1000 transmits a result of determining whether the cooking appliance 1000 undergoes empty heating to the heating device 2000.

[0338] In operation S1720d, the heating device 2000 may receive and obtain a result of determining whether the cooking appliance 1000 undergoes empty heating from the cooking appliance 1000 via the communication interface 2300.

[0339] When it is determined based on the result of the determination in operation S1720d that the cooking appliance 1000 is not subjected to empty heating, in operation S1721d, the heating device 2000 supplies power (e.g., 1400W) corresponding to the user input to the cooking appliance 1000, otherwise when it is determined that the cooking appliance 1000 is subjected to empty heating, in operation S1722d, the heating device 2000 notifies the user of empty heating. In this case, the notification of empty heating can be made via the output interface 2510 of the heating device 2000. In an embodiment of the present disclosure, when the heating device 2000 is capable of being connected to a server or a user's mobile device via communication, the heating device 2000 can notify the server or the user's mobile device that the cooking appliance 1000 is subjected to empty heating. The notification of empty heating can be made via sound, display, smart phone notification, etc.

[0340] Fig.17e is a flowchart of a method of determining whether a cooking appliance undergoes empty heating according to an embodiment of the present disclosure.

[0341] refer to Fig.17e , assuming that the cooking appliance 1000 is a reference Figure 7b A wired cooking appliance 1000e is described.

[0342] In operation S1701e, the cooking appliance 1000 receives a user input. The user input may be an input for pressing a power button to activate the cooking appliance 1000. By receiving the user input, the power supply 1010 of the cooking appliance 1000 may be activated and placed in a heating standby state.

[0343] When the power supply 1010 of the cooking appliance 1000 is activated, the communication module is also powered on in operation S1703e to enable the cooking appliance 1000 to communicate. Depending on the specification of the cooking appliance 1000, the wired cooking appliance 1000e may not include the communication module, and thus operation S1703e may be omitted.

[0344] In operation S1705e, a user input for heating the cooking appliance 1000 is performed. The user input in operation S1705e may be a user input for starting a heating operation and an operation input and / or a recipe input on how to heat the cooking appliance 1000. When the cooking appliance 1000 is a cooking appliance 1000 in which a power input operation and a heating operation are not particularly distinguished from each other, since heating is immediately performed when the power of the cooking appliance 1000 is turned on by the user input in operation S1701e, the user input in operation S1705e may be omitted.

[0345] In operation S1707e, when the sensor unit 1040 is activated, the cooking appliance 1000 obtains a temperature measurement value from the temperature sensor. As described in the embodiment of the present disclosure, the cooking appliance 1000 may measure the temperature of the inside of the cooking appliance 1000 or water via the first temperature sensor 1041, and measure the temperature of the bottom surface of the cooking appliance 1000 via the second temperature sensor 1042. Unless a special situation occurs, the temperature may be continuously measured in operation S1707e while the cooking appliance 1000 is being activated.

[0346] In operation S1709e, according to an embodiment of the present disclosure, the controller 1020 of the cooking appliance 1000 may control the cooking appliance 1000 to be heated with a certain electric power for a specific period of time (10 seconds) so as to first determine whether the cooking appliance 1000 undergoes empty heating, rather than performing a heating operation corresponding to the user input in operation S1705e.

[0347] When the cooking appliance 1000 is heated with the power for the empty heating determination in operation S1709e, the cooking appliance 1000 may obtain a temperature measurement value from the temperature sensor in operation S1711e. As described above in the embodiment of the present disclosure, the cooking appliance 1000 may measure the temperature of the inside of the cooking appliance 1000 or the water via the first temperature sensor 1041, and measure the temperature of the bottom surface of the cooking appliance 1000 via the second temperature sensor 1042. However, as described in the previous operation S1707e, unless a special situation occurs, the temperature may be continuously measured while the cooking appliance 1000 is being activated, so when the temperature measurement that has already started in operation S1707e continues, the temperature measurement in operation 1711e may be omitted.

[0348] In operation S1713e, the controller 1020 of the cooking appliance 1000 stops heating the cooking appliance 1000 for a certain period of time (eg, 5 seconds), and measures a temperature via the first temperature sensor 1041 and / or the second temperature sensor 1042 during the period of time.

[0349] In operation S1715e, the controller 1020 of the cooking appliance 1000 determines whether the cooking appliance 1000 undergoes empty heating based on the temperature measurement value obtained in the previous operation. In operation S1717e, when it is determined in operation S1715e that the cooking appliance 1000 does not undergo empty heating, the controller 1020 may control the cooking appliance 1000 to supply power corresponding to the user input performed in operation S1705e.

[0350] In operation S1719e, when the controller 1020 determines that the cooking appliance 1000 undergoes empty heating as a result of the determination in operation S1715e, the controller 1020 may display a notification that the cooking appliance 1000 undergoes empty heating via the output interface 1051 of the cooking appliance 1000 and control the relay 1007 to stop the heating operation.

[0351] Fig.18 is a flowchart of a method for identifying a position of a cooking appliance performed by a heating device according to an embodiment of the present disclosure.

[0352] In operation S1810, according to an embodiment of the present disclosure, the heating device 2000 may transmit a preset first level of power to the cooking appliance 1000 in order to detect the cooking appliance 1000 capable of communicating therewith. In this case, the heating device 2000 may operate in a small appliance detection mode. The first level of power is power for driving the communication interface 1030 of the cooking appliance 1000, and may be, for example, 100W to 300W.

[0353] In operation S1820, according to an embodiment of the present disclosure, when receiving the first level of power from the heating device 2000, the cooking appliance 1000 may activate the communication interface 1030 and transmit a first wireless communication signal. For example, the cooking appliance 1000 may broadcast the first wireless communication signal including the first packet at regular intervals by using short-range wireless communication (e.g., Bluetooth, BLE, etc.).

[0354] In operation S1830 , according to an embodiment of the present disclosure, when receiving the first wireless communication signal transmitted via the communication interface 1030 of the cooking appliance 1000 , the heating device 2000 may transmit power to the plurality of cooking zones according to a plurality of different power transmission modes.

[0355] According to an embodiment of the present disclosure, the first packet included in the first wireless communication signal transmitted from the cooking appliance 1000 may not include the location information of the cooking appliance 1000. In this case, the heating device 2000 may not accurately identify on which cooking zone the cooking appliance 1000 is located. Therefore, in order to identify the location of the cooking appliance 1000, the heating device 2000 may control the inverter circuit 2113 to output power according to different power transmission modes of each cooking zone. For example, when the heating device 2000 includes three cooking zones (i.e., the first cooking zone to the third cooking zone), the heating device 2000 may control the inverter circuit 2113 to output power according to the first power transmission mode via the first working coil corresponding to the first cooking zone, output power according to the second power transmission mode via the second working coil corresponding to the second cooking zone, and output power according to the third power transmission mode via the third working coil corresponding to the third cooking zone.

[0356] According to an embodiment of the present disclosure, when the second type cooking appliance 1000b (small electrical appliance) is available only on some of the plurality of cooking zones, the heating device 2000 may output power from the some cooking zones according to a specific power transmission mode. For example, when the heating device 2000 includes three cooking zones, but the second type cooking appliance 1000b is available only on the first cooking zone and the third cooking zone, the heating device 2000 may control the inverter circuit 2113 to output power via the first working coil corresponding to the first cooking zone according to the first power transmission mode, to output power via the third working coil corresponding to the third cooking zone according to the third power transmission mode, and not to output power via the second working coil corresponding to the second cooking zone according to the second power transmission mode.

[0357] In operation S1830, according to an embodiment of the present disclosure, when the first wireless communication signal is detected, the heating device 2000 may control the inverter circuit 2113 so that the plurality of working coils 2120 respectively corresponding to the plurality of cooking zones generate magnetic fields according to a plurality of different power transmission modes.

[0358] According to an embodiment of the present disclosure, the first packet included in the first wireless communication signal transmitted from the cooking appliance 1000 may not include the location information of the cooking appliance 1000. In this case, the heating device 2000 may not accurately identify on which cooking zone the cooking appliance 1000 is located. Therefore, in order to identify the location of the cooking appliance 1000, the heating device 2000 may control the inverter circuit 2113 to output power according to different power transmission modes of each cooking zone. For example, when the heating device 2000 includes three cooking zones (i.e., the first cooking zone to the third cooking zone), the heating device 2000 may control the inverter circuit 2113 to output power according to the first power transmission mode via the first working coil corresponding to the first cooking zone, output power according to the second power transmission mode via the second working coil corresponding to the second cooking zone, and output power according to the third power transmission mode via the third working coil corresponding to the third cooking zone.

[0359] The plurality of power transmission modes may be respectively differently set based on at least one of a duration of a power transmission interval, a duration of a power cutoff interval, or a power level.

[0360] In operation S1840, according to an embodiment of the present disclosure, the cooking appliance 1000 may transmit a second wireless communication signal including identification information about the cooking appliance 1000. In this case, when a specific power transmission mode is detected, the cooking appliance 1000 may transmit information about a cooking zone corresponding to the specific power transmission mode (as location information of the cooking appliance 1000) and identification information about the cooking appliance 1000 to the heating device 2000. For example, the heating device 2000 may broadcast a second packet including both the location information of the cooking appliance 1000 and the identification information of the cooking appliance 1000. On the other hand, when the cooking appliance 1000 does not detect the specific power transmission mode, the cooking appliance 1000 may broadcast a second packet at a specific interval, the second packet not including the location information of the cooking appliance 1000 but only including identification information about the cooking appliance 1000.

[0361] In operation S1850, according to the disclosed embodiment, the heating device 2000 may determine whether the location information of the cooking appliance 1000 is included in the second wireless communication signal. For example, the heating device 2000 may determine whether the second packet received from the cooking appliance 1000 includes information about the cooking zone where the cooking appliance 1000 is located.

[0362] In operation S1860 , according to an embodiment of the present disclosure, when the location information of the cooking appliance 1000 is not included in the second wireless communication signal, the heating apparatus 2000 may output a notification indicating that the location of the cooking appliance 1000 should be checked.

[0363] When the heating device 2000 receives the second wireless communication signal, but the second wireless communication signal does not include the position information of the cooking appliance 1000, the cooking appliance 1000 may be misplaced and fail to detect a specific power transmission mode, although the cooking appliance 1000 is a second type cooking appliance 1000b (a small electrical appliance) capable of communication, and thus the heating device 2000 may output a notification indicating that the position of the cooking appliance 1000 should be checked. For example, when the area where the cooking appliance 1000 is placed overlaps with a portion of the first cooking zone, the cooking appliance 1000 may fail to accurately detect the first power transmission mode corresponding to the first cooking zone.

[0364] According to an embodiment of the present disclosure, the heating device 2000 may also display a notification on the display indicating that the location of the cooking appliance 1000 should be checked or output the notification in the form of audio. After outputting the notification indicating that the location of the cooking appliance 1000 should be checked, the heating device 2000 returns to operation S1830 to transmit power from the plurality of cooking zones again according to the plurality of different power transmission modes.

[0365] In operation S1870, according to an embodiment of the present disclosure, when the second wireless communication signal includes the location information of the cooking appliance 1000, the heating device 2000 may output information about the first cooking zone where the cooking appliance 1000 is located and identification information about the cooking appliance 1000. For example, the heating device 2000 may indicate that the cooking appliance 1000 is located on the first cooking zone by displaying the identification information about the cooking appliance 1000 in an area where the power level of the first cooking zone is displayed on the GUI.

[0366] In operation S1870, according to an embodiment of the present disclosure, the heating device 2000 can output information about a first cooking zone where the cooking appliance 1000 is located among multiple cooking zones (hereinafter referred to as position information of the cooking appliance 1000) and identification information about the cooking appliance 1000 based on the second wireless communication signal.

[0367] According to an embodiment of the present disclosure, the heating device 2000 may display identification information about the cooking appliance 1000 in the form of text or image on the display. For example, the heating device 2000 may display text indicating the name or type of the cooking appliance 1000 or an icon image of the cooking appliance 1000. According to an embodiment of the present disclosure, the heating device 2000 may output identification information about the cooking appliance 1000 in the form of voice via an audio output interface.

[0368] In addition, according to an embodiment of the present disclosure, the heating device 2000 may indicate that the cooking appliance 1000 is located on the first cooking zone by displaying identification information about the cooking appliance 1000 at a position where the power level of the first cooking zone is displayed on the GUI. For example, when the cooking appliance 1000 is a smart pot, and the smart pot is placed on the lower left cooking zone, the heating device 2000 may display an icon image of the smart pot at the lower left of the GUI. According to an embodiment of the present disclosure, the heating device 2000 may output information about the first cooking zone where the cooking appliance 1000 is located (location information of the cooking appliance 1000) in the form of voice via the audio output interface.

[0369] In operation S1880, according to an embodiment of the present disclosure, the heating device 2000 may operate in the power transmission standby mode. For example, when a second wireless communication signal including information about the first cooking zone and identification information about the cooking device 1000 is received from the cooking device 1000, the heating device 2000 may operate in the power transmission standby mode to transmit power to the cooking device 1000.

[0370] According to an embodiment of the present disclosure, the power transmission standby mode may be a mode in which the heating device 2000 waits for a user input for requesting power to be transmitted to the cooking appliance 1000. The user input for requesting power to be transmitted to the cooking appliance 1000 may include various types of inputs, such as an input for pressing an operation button, an input for selecting a menu, an input for adjusting a temperature, an input for selecting a specific recipe, an input for selecting a power level, etc. After operation S1880, the following operation may be performed: Fig.17a The operation for determining the empty heating is shown. Although reference has been made to Fig.18 The embodiment of the present disclosure in which the cooking zone where the cooking appliance 1000 is located and the cooking appliance 1000 are identified is described, but Fig.18 and the following Figures 19 to 24 The operations in the embodiments of the present disclosure may be merely optional and may not be considered necessary when determining empty heating.

[0371] Fig.19 is a diagram illustrating an operation of a heating device when a cooking appliance (small electric appliance) is placed on the heating device according to an embodiment of the present disclosure.

[0372] refer to Fig.19 , when the user turns on the heating device 2000 when the second type cooking utensil 1000b is placed on the top plate of the heating device 2000, the heating device 2000 may initialize the system including the heating device 2000 and perform an IH container detection operation (pot detection operation). In this case, when the second type cooking utensil 1000b is a 2-1 type cooking utensil 1000b-1 including a magnetic material, the heating device 2000 may detect that the 2-1 type cooking utensil 1000b-1 is placed on the top plate using a current sensor. On the other hand, when the second type cooking utensil 1000b is a 2-2 type cooking utensil 1000b-2 including a receiving coil 1003, the heating device 2000 may not be able to detect that the 2-2 type cooking utensil 1000b-2 is placed on the top plate by using a current sensor.

[0373] The heating device 2000 may perform a small appliance detection operation (small object detection operation) after performing the IH container detection operation. For example, the heating device 2000 may send a first level of power for driving the communication interface 1030 of the second type cooking appliance 1000b to the second type cooking appliance 1000b, and operate in a scanning mode. When receiving the first level of power, the second type cooking appliance 1000b may drive the communication interface 1030 and broadcast a first packet. The heating device 2000 operating in the scanning mode may recognize that the second type cooking appliance 1000b is located on the top plate by receiving the first packet broadcast by the second type cooking appliance 1000b.

[0374] However, when the first packet does not include information about the cooking zone where the second type cooking appliance 1000b is located, the heating device 2000 may operate in the cooking zone determination mode to determine the location of the second type cooking appliance 1000b. For example, the heating device 2000 may output power according to different power transmission modes for each cooking zone. In this case, since the second type cooking appliance 1000b is placed on the lower left cooking zone, the second type cooking appliance 1000b may detect a specific power transmission mode corresponding to the lower left cooking zone. The second type cooking appliance 1000b may be identified as being located on the lower left cooking zone by comparing each of a plurality of pre-stored power transmission modes from the heating device 2000 with a specific power transmission mode. In this case, the second type cooking appliance 1000b may send a second packet to the heating device 2000 (e.g., addressing the second packet to the heating device 2000), the second packet including information indicating that the second type cooking appliance 1000b is located in the lower left cooking zone and identification information about the second type cooking appliance 1000b. In this case, the second packet may also include communication connection information.

[0375] The heating device 2000 may establish a communication connection with the second type cooking appliance 1000b based on the communication connection information included in the second packet. In the case where the second type cooking appliance 1000b has been previously paired with the heating device 2000, the communication connection information may include pairing information. According to an embodiment of the present disclosure, the heating device 2000 may establish a short-range wireless communication channel (e.g., a Bluetooth communication channel or a BLE communication channel) with the second type cooking appliance 1000b. Establishing a Bluetooth communication channel may mean enabling the second type cooking appliance 1000b and the heating device 2000 to send and receive data by using a Bluetooth communication method. The BLE communication channel may be a connectionless virtual communication channel in which the second type cooking appliance 1000b and the heating device 2000 send and receive advertising packets via mutual scanning, or may be a connection-based communication channel that creates a session using a BLE connection request from the heating device 2000.

[0376] When the heating device 2000 has established a communication connection with the second type cooking appliance 1000b, the heating device 2000 may control the inverter circuit 2113 to transmit a first level of power for maintaining a communication connection with the second type cooking appliance 1000b to the pickup coil 1001 of the second type cooking appliance 1000b. In this case, when an operation instruction (e.g., coffee extraction start, automatic cooking start, heating, keeping warm, etc.) is received from the user, the heating device 2000 may control the inverter circuit 2113 to transmit a second level of power for operating the second type cooking appliance 1000b to the second type cooking appliance 1000b. The second level of power may be power for driving a load (e.g., a heater, a motor, a battery, etc.) of the second type cooking appliance 1000b.

[0377] Fig. 20 is a flowchart of a method for providing a GUI according to identification information about a cooking appliance, performed by a heating device according to an embodiment of the present disclosure.

[0378] In operation S2010, the heating apparatus 2000 receives a user input. The user input may be an input for pressing a power button of the heating apparatus 2000, but is not limited thereto.

[0379] In operation S2020, according to an embodiment of the present disclosure, the heating device 2000 may perform an IH container detection operation and a small appliance detection operation.

[0380] For example, the heating device 2000 may detect the first type cooking appliance 1000a and the 2-1 type cooking appliance 1000b-1, each including a magnetic material, by transmitting power for detecting an IH container and then detecting the current value of the working coil. In addition, the heating device 2000 may detect the second type cooking appliance 1000b (e.g., the 2-1 type cooking appliance 1000b-1 and the 2-2 type cooking appliance 1000b-2) with which communication is possible by transmitting power for driving the communication interface 1030 of the cooking appliance 1000 and detecting a wireless communication signal transmitted from the cooking appliance 1000. In this case, the power for detecting the IH container may be less than the power for driving the communication interface 1030 of the cooking appliance 1000.

[0381] According to an embodiment of the present disclosure, the heating device 2000 may perform a small appliance detection operation after first performing an IH container detection operation, or perform an IH container detection operation after performing a small appliance detection operation. In addition, the order of such operations may be determined by the user's choice. For example, in the case where a user purchases the heating device 2000 to be used primarily with a second type of cooking appliance 1000b (a small appliance) capable of communication, the user may set the order of the detection operations so that the heating device 2000 first performs a small appliance detection operation. The user may use the same account to set the order of the IH container detection operation and the small appliance detection operation via the user interface 2500 of the heating device 2000 or via a mobile terminal connected to the heating device 2000.

[0382] In operations S2030 and S2040 , when the cooking appliance 1000 placed on the top plate is capable of communication, the heating device 2000 may recognize the cooking appliance 1000 as a second type cooking appliance 1000 b (a small electrical appliance).

[0383] In operation S2050, when the cooking appliance 1000 is identified as the second type cooking appliance 1000b, the heating device 2000 may provide a GUI corresponding to the identification information about the second type cooking appliance 1000b (a small electrical appliance). Since the second type cooking appliance 1000b may include various small electrical appliances such as a kettle, a toaster, a rice cooker, a coffee machine, a blender, etc., the heating device 2000 may provide various types of GUIs corresponding to the identification information about the small electrical appliances.

[0384] In operations S2030 and S2060, when the cooking utensil 1000 includes a magnetic material but cannot communicate with the heating device 2000, the heating device 2000 may identify the cooking utensil 1000 located on the top plate of the heating device 2000 as a first type cooking utensil 1000a (general IH container). When the cooking utensil 1000 includes a magnetic material but cannot communicate, the heating device 2000 identifies the cooking utensil 1000 as a cooking utensil that cannot determine empty heating. On the other hand, the heating device 2000 may identify the cooking utensil 1000 placed on the top plate of the heating device 2000 as a second type cooking utensil 1000b. The heating device 2000 identifies the identified second type cooking utensil 1000b as a cooking utensil that can determine empty heating.

[0385] In operation S2070, when the cooking appliance 1000 is identified as the first type cooking appliance 1000a, the heating device 2000 may provide a GUI corresponding to a general IH container. For example, instead of displaying identification information corresponding to the cooking appliance 1000 on the display, the heating device 2000 may display an initial power level in an area corresponding to the cooking zone where the cooking appliance 1000 is located. In addition, the heating device 2000 may output a notification indicating that a general IH container has been detected.

[0386] In operation S2080 , the heating device 2000 may operate in the power transmission standby mode while providing a GUI corresponding to the cooking appliance 1000 .

[0387] According to an embodiment of the present disclosure, the power transmission standby mode may be a mode in which the heating device 2000 waits for a user input for transmitting power to the cooking appliance 1000. The user input for transmitting power to the cooking appliance 1000 may include various types of inputs, such as an input for pressing an operation button, an input for selecting a menu, an input for adjusting a temperature, an input for selecting a specific recipe, an input for selecting a power level, and the like.

[0388] In addition, when the cooking appliance 1000 is the second type cooking appliance 1000 b , the heating device 2000 may continuously transmit power for maintaining driving of the communication interface 1030 of the cooking appliance 1000 to the cooking appliance 1000 in the power transmission standby mode.

[0389] According to an embodiment of the present disclosure, even if the user does not input the type of the cooking appliance 1000, the heating device 2000 can identify the type of the cooking appliance 1000 that wirelessly receives power and whether the cooking appliance 1000 is a cooking appliance that requires determination regarding air heating by simultaneously performing an IH container detection operation and a small appliance detection operation.

[0390] After the type of cooking appliance 1000 has been identified, Figures 17a to 17d The method shown determines whether the cooking appliance 1000 is experiencing dry heating.

[0391] Hereinafter, an operation of the heating apparatus 2000 outputting a GUI is described.

[0392] Fig.21 is a diagram illustrating an operation of providing a GUI according to identification information about a cooking appliance and whether the cooking appliance undergoes empty heating according to an embodiment of the present disclosure.

[0393] refer to Fig.21 210, when the heating device 2000 can detect the cooking utensil 1000 placed in the second cooking zone (the cooking zone at the lower left), and according to Figures 17a to 17d When the method shown in the figure determines that the cooking appliance 1000 experiences empty heating, the heating device 2000 can display the position information and identification information about the cooking appliance 1000 and whether the cooking appliance 1000 experiences empty heating on the user interface 2500. For example, when the cooking appliance 1000 is a coffee machine, the heating device 2000 can indicate that the coffee machine is located on the second cooking zone (the cooking zone at the lower left) by displaying the coffee machine icon 212 at a position corresponding to the second cooking zone (the cooking zone at the lower left). In addition, when the coffee machine experiences empty heating without water inside, the heating device 2000 can notify the user that the coffee machine experiences empty heating by displaying the flashing coffee machine icon 212. Alternatively, the heating device 2000 can output the position information and identification information about the cooking appliance 1000 and the information indicating whether the cooking appliance 1000 experiences empty heating in the form of a text notification (e.g., "the coffee machine in the cooking zone 1 experiences empty heating") and an audio notification. Alternatively, the heating device 2000 may notify the user that the coffee machine is experiencing idle heating by displaying a circular graphic around the flashing coffee machine icon 212. In an embodiment of the present disclosure, the user may be notified that the coffee machine is experiencing idle heating by a combination of various methods.

[0394] Fig. 22 is a flowchart of a method for determining a position of a cooking appliance performed by a heating device according to an embodiment of the present disclosure.

[0395] In operation S2201, according to an embodiment of the present disclosure, the heating device 2000 may transmit a preset first level of power to the cooking appliance 1000 so as to drive the communication interface 1030 of the cooking appliance 1000. In this case, the heating device 2000 may operate in a small appliance detection mode. The first level of power is power for driving the communication interface 1030 of the cooking appliance 1000, and may be, for example, 100W to 300W.

[0396] In operation S2202, according to an embodiment of the present disclosure, when receiving the first level of power from the heating device 2000, the cooking appliance 1000 may activate the communication interface 1030 and transmit a first wireless communication signal. For example, the cooking appliance 1000 may broadcast the first wireless communication signal including the first packet at regular intervals by using short-range wireless communication (e.g., Bluetooth, BLE, etc.).

[0397] In operation S2203 , according to an embodiment of the present disclosure, when receiving the first wireless communication signal transmitted via the communication interface 1030 of the cooking appliance 1000 , the heating device 2000 may transmit power at the plurality of cooking zones according to a plurality of different power transmission modes.

[0398] According to an embodiment of the present disclosure, the first packet included in the first wireless communication signal sent from the cooking appliance 1000 may not include the location information of the cooking appliance 1000. In this case, the heating device 2000 may not accurately identify on which cooking zone the cooking appliance 1000 is located. Therefore, in order to identify the location of the cooking appliance 1000, the heating device 2000 may control the inverter circuit 2113 to output power according to different power transmission modes for each cooking zone. For example, when the heating device 2000 includes three cooking zones (i.e., the first cooking zone to the third cooking zone), the heating device 2000 may control the inverter circuit 2113 to output power according to the first power transmission mode via the first working coil corresponding to the first cooking zone, to output power according to the second power transmission mode via the second working coil corresponding to the second cooking zone, and to output power according to the third power transmission mode via the third working coil corresponding to the third cooking zone. Since operation S2203 corresponds to Fig.18 Operation S1830 is performed, and thus the description already provided above will be omitted here.

[0399] In operation S2204, according to an embodiment of the present disclosure, the cooking appliance 1000 may detect a first power transmission mode. According to an embodiment of the present disclosure, the cooking appliance 1000 may analyze a voltage output from a rectifier of the cooking appliance 1000 to detect one of a plurality of power transmission modes. For example, when the cooking appliance 1000 is located on a first cooking zone, the cooking appliance 1000 may analyze a first voltage output from the rectifier to detect a first power transmission mode in which a duration of the power transmission interval T1 is 3 seconds and a duration of the power cutoff interval T2 is 1 second.

[0400] In operation S2205 , according to an embodiment of the present disclosure, the cooking appliance 1000 may transmit a second wireless communication signal including information about the first power transmission mode and identification information about the cooking appliance 1000 .

[0401] The information about the first power transmission mode may include, but is not limited to, at least one of an identification value of the first power transmission mode, a duration of a power transmission interval, a duration of a power cut-off interval, or a power level. The identification information about the cooking appliance 1000 is unique information for identifying the cooking appliance 1000, and may include, but is not limited to, at least one of a MAC address, a model name, appliance type information (e.g., IH type ID, heater type ID, and motor type ID), manufacturer information (e.g., manufacturer ID), a serial number, or a manufacturing date.

[0402] In operation S2206, according to an embodiment of the present disclosure, the heating device 2000 may determine that the first cooking zone corresponding to the first power transmission mode is the location of the cooking appliance 1000 based on the second wireless communication signal. For example, the heating device 2000 may determine the information about the first power transmission mode included in the second wireless communication signal, and compare the first power transmission mode with the information about the plurality of pre-stored power transmission modes, thereby identifying the first cooking zone corresponding to the first power transmission mode. In this case, the heating device 2000 may determine that the cooking appliance 1000 that has detected the first power transmission mode is located in the first cooking zone.

[0403] According to an embodiment of the present disclosure, when the second wireless communication signal does not include information about the specific power transmission mode, the heating device 2000 may output a notification indicating that the location of the cooking appliance 1000 should be checked. For example, when the heating device 2000 receives the second wireless communication signal, but the second wireless communication signal does not include the specific power transmission mode, this may be because the cooking appliance 1000 is misplaced and the specific power transmission mode cannot be detected, although the cooking appliance 1000 is a cooking appliance capable of communication, and therefore, the heating device 2000 may output a notification indicating that the location of the cooking appliance 1000 should be checked.

[0404] According to an embodiment of the present disclosure, the heating device 2000 may also display a notification on a display indicating that the location of the cooking appliance 1000 should be checked or output the notification in the form of voice. After outputting the notification indicating that the location of the cooking appliance 1000 should be checked, the heating device may transmit power from the plurality of cooking zones again according to a plurality of different power transmission modes.

[0405] In operation S2207, the heating device 2000 may output information about the first cooking zone where the cooking appliance 1000 is located and identification information about the cooking appliance 1000. For example, the heating device 2000 may indicate that the cooking appliance 1000 is located on the first cooking zone by displaying identification information about the cooking appliance 1000 in an area on the GUI displaying a power level of the first cooking zone. Fig.18 Operation S1870 is performed, and thus the description already provided above will be omitted here.

[0406] In addition, according to an embodiment of the present disclosure, the heating device 2000 can identify the location of the cooking appliance 1000 by using the NFC function instead of the power transmission mode. For example, each of the heating device 2000 and the cooking appliance 1000 may have a communication coil 1002 (or 2001) and an NFC module (NFC chip) therein. The communication coil 1002 (2001) may be an NFC antenna coil, and the NFC module may include a circuit for NFC communication. In addition, when the heating device 2000 includes a plurality of cooking zones, the NFC antenna coil may be arranged in each of the plurality of cooking zones.

[0407] According to an embodiment of the present disclosure, the NFC antenna coil included in the heating device 2000 may be arranged at a position corresponding to the position of the NFC antenna coil included in the cooking appliance 1000. For example, when the NFC antenna coil included in the heating device 2000 is arranged in the central portion of each cooking zone, the NFC antenna coil included in the cooking appliance 1000 may also be arranged in the bottom central portion of the cooking appliance 1000. In another example, when the NFC antenna coil included in the heating device 2000 is arranged at an edge (e.g., outside the transmission coil), the NFC antenna coil in the cooking appliance 1000 may also be arranged at the bottom edge of the cooking appliance 1000.

[0408] According to an embodiment of the present disclosure, the NFC antenna coil included in the heating device 2000 may be arranged at the edge of each cooking zone, and the NFC antenna coil included in the cooking appliance 1000 may be arranged in the bottom central portion of the cooking appliance 1000. On the other hand, the NFC antenna coil included in the heating device 2000 may be arranged in the central portion of each cooking zone, and the NFC antenna coil included in the cooking appliance 1000 may be arranged at the bottom edge of the cooking appliance 1000.

[0409] In addition, the NFC module included in each of the heating device 2000 and the cooking appliance 1000 may operate as an NFC tag or an NFC reader depending on the situation. Fig.23 An embodiment of the present disclosure is described in which the NFC module of the heating device 2000 operates as an NFC reader and the NFC module of the cooking appliance 1000 operates as an NFC tag.

[0410] Fig.23 is a flowchart of a method for identifying a location of a cooking appliance by using an NFC tag embedded in the cooking appliance, performed by a heating device according to an embodiment of the present disclosure.

[0411] In operation S2301, the heating device 2000 may recognize an NFC tag of the cooking appliance 1000. When the heating device 2000 includes a plurality of cooking zones, one NFC reader may be provided for each of the plurality of cooking zones. Each of the NFC reader and the NFC tag may include an NFC antenna coil. According to an embodiment of the present disclosure, when the cooking appliance 1000 is placed on the cooking zone, one of the plurality of NFC readers respectively corresponding to the plurality of cooking zones may recognize the NFC tag of the cooking appliance 1000. For example, when the cooking appliance 1000 is placed on the first cooking zone, the first NFC reader provided in the first cooking zone may recognize the NFC tag of the cooking appliance 1000. For example, when the cooking appliance 1000 is placed on the first cooking zone, the distance between the NFC antenna coil included in the first cooking zone and the NFC antenna coil in the cooking appliance 1000 is less than a certain distance (e.g., 10 cm), and thus the first NFC reader of the heating device 2000 may recognize the NFC tag of the cooking appliance 1000.

[0412] Identifying the NFC tag may include receiving information stored in the NFC tag. For example, the heating device 2000 may obtain information stored in the NFC tag of the cooking appliance 1000 by identifying the NFC tag of the cooking appliance 1000. According to an embodiment of the present disclosure, the NFC tag of the cooking appliance 1000 may store pre-arranged simple information so that the heating device 2000 can identify the cooking appliance 1000. For example, the NFC tag of the cooking appliance 1000 may include identification information indicating the type of the cooking appliance 1000.

[0413] In operation S2302, the heating device 2000 may recognize that the cooking appliance 1000 is located on a cooking zone corresponding to an NFC reader that recognizes an NFC tag of the cooking appliance 1000. NFC is a contactless wireless communication technology that uses a frequency of 13.56 megahertz (MHz) to exchange data within a short distance of less than 10 centimeters. Therefore, when a first NFC reader among a plurality of NFC readers recognizes an NFC tag of the cooking appliance 1000, the heating device 2000 may determine that the cooking appliance 1000 is located near the first NFC reader (i.e., located on a first cooking zone where the first NFC reader is provided).

[0414] In operation S2303, the heating device 2000 may output information about the cooking zone where the cooking appliance 1000 is located. In addition, the heating device 2000 may also output identification information about the cooking appliance 1000 obtained from the NFC tag of the cooking appliance 1000. For example, the heating device 2000 may indicate that the cooking appliance 1000 is located on the first cooking zone by displaying identification information (e.g., an icon) about the cooking appliance 1000 in an area where the power level of the first cooking zone is displayed on the GUI.

[0415] refer to Fig.24 An operation in which the heating device 2000 recognizes the location of the cooking appliance 1000 by using the NFC tag included in the cooking appliance 1000 is described.

[0416] Fig.24 2 is a diagram illustrating an operation of a heating device according to an embodiment of the present disclosure to identify a location of a cooking appliance by using an NFC tag included in the cooking appliance. Fig.24 An example in which the cooking appliance 1000 is a coffee machine is described.

[0417] refer to Fig.24 , the heating device 2000 may include a first NFC reader 231 on the first cooking zone at the upper left and a second NFC reader 232 on the second cooking zone at the lower left, and a third NFC reader 233 may be included on the third cooking zone at the center of the right side. The first NFC reader 231, the second NFC reader 232, and the third NFC reader 233 may be disposed on or below the top plate (tempered glass) of the heating device 2000. In addition, the first NFC reader 231, the second NFC reader 232, and the third NFC reader 233 may be arranged at the central portion of each cooking zone or at the edge of each cooking zone, respectively. Each of the first NFC reader 231, the second NFC reader 232, and the third NFC reader 233 may include an NFC antenna coil.

[0418] When the user places the cooking appliance 1000 on the third cooking zone at the center of the right side and presses the power button, the third NFC reader 233 of the heating device 2000 may identify the NFC tag 234 of the cooking appliance 1000 and transmit the identification result to the processor 2200. For example, since the third NFC reader 233 is located within a certain distance (e.g., 10 cm) from the NFC tag 234, the third NFC reader 233 may obtain identification information (e.g., product type (coffee machine) information) of the cooking appliance 1000 stored in the NFC tag 234, and transmit the obtained identification information about the cooking appliance 1000 to the processor 2200.

[0419] Since the third NFC reader 233 recognizes the NFC tag 234 of the cooking appliance 1000, the processor 2200 of the heating device 2000 can recognize that the cooking appliance 1000 is located on the third cooking zone where the third NFC reader 2323 is arranged. In addition, the processor 2200 of the heating device 2000 can recognize whether the cooking appliance 1000 is the first type cooking appliance 1000a or the second type cooking appliance 1000b based on the identification information of the cooking appliance 1000 (for example, product type (coffee machine) information).

[0420] The heating device 2000 may output the position information of the cooking appliance 1000, the identification information about the cooking appliance 1000, and the information indicating whether the cooking appliance 1000 is subjected to empty heating via the user interface 2500. For example, when the cooking appliance 1000 is a coffee machine as the second type cooking appliance 1000b, the heating device 2000 may indicate that the coffee machine is located in the third cooking zone (cooking zone at the center of the right side) by displaying the coffee machine icon 235 at a position corresponding to the third cooking zone (cooking zone at the center of the right side). In addition, when the coffee machine is subjected to empty heating, the heating device 2000 may output a notification such as "the coffee machine on the cooking zone 3 is subjected to empty heating".

[0421] Fig.25 is a flowchart illustrating operations between a heating device and a cooking appliance when it is determined that the cooking appliance undergoes empty heating according to an embodiment of the present disclosure.

[0422] Can be Fig.17a The method for determining the empty heating in the flowchart is then executed Fig.25 Alternatively, in Figures 17b to 17d The illustrated method then performs the operation of the cooking appliance 1000 .

[0423] In operation S2502, the heating device 2000 is heated according to the above reference Figures 17a to 17d The described method for determining empty heating determines whether the cooking appliance 1000 undergoes empty heating. When it is determined that the cooking appliance 1000 undergoes empty heating, the processor 2200 of the heating device 2000 informs the cooking appliance 1000 that the cooking appliance 1000 undergoes empty heating in operation S2503.

[0424] When it is determined in operation S2502 that the cooking appliance 1000 is not experiencing empty heating, in operation S2506, power corresponding to the user input is output. However, when a notification about empty heating is received, in operation S2505, the cooking appliance 1000 stops heating the heater via the relay 1007 or the thermal fuse 1008 to prevent the heater from overheating due to empty heating. In addition, in operation S2507, when the cooking appliance 1000 is capable of displaying information or outputting audio, the cooking appliance 1000 can notify the user that the cooking appliance 1000 is experiencing empty heating by displaying "empty heating" or outputting the information in the form of audio.

[0425] In addition, when it is determined in operation S2502 that the cooking appliance 1000 undergoes empty heating, the processor 2200 of the heating device 2000 performs control to stop wireless power transmission via the transmission coil 2120 in operation S2504.

[0426] In operation S2508, the processor 2200 of the heating device 2000 may output information indicating that the cooking appliance 1000 undergoes empty heating via the output interface 2510. According to an embodiment of the present disclosure, the processor 2200 may output the type of the cooking appliance 1000 undergoing empty heating and the information indicating which cooking zone the cooking appliance 1000 is placed on on the output interface 2510. Optionally, the processor 2200 of the heating device 2000 may notify the registered mobile device via the communication interface 2300 that the cooking appliance 1000 undergoes empty heating. In addition, the processor 2200 may notify the registered mobile device via the communication interface 2300 that the cooking appliance 1000 undergoes empty heating and the type of the cooking appliance 1000 and the information indicating which cooking zone the cooking appliance 1000 is placed on. Optionally, the processor 2200 of the heating device 2000 may notify the registered remote server via the communication interface 2300 that the cooking appliance 1000 undergoes empty heating. In addition, the processor 2200 may perform control to notify the registered remote server via the communication interface 2300 that the cooking appliance 1000 undergoes empty heating, as well as the type of the cooking appliance 1000 and information indicating on which cooking zone the cooking appliance 1000 is placed.

[0427] Fig.26 is a flowchart of a method for determining empty heating when reheating a cooking appliance, performed by a heating device according to an embodiment of the present disclosure.

[0428] refer to Fig.26 In operation S2602, the heating device 2000 continues to heat the cooking appliance 1000. Even after the heating device 2000 initially determines empty heating when starting the operation according to the user input, or even if the determination regarding empty heating is not performed when starting the operation, the determination regarding empty heating may be performed during heating, such as Fig.26 In the case where all the water in the cooking appliance 1000 evaporates during heating, or in the case where the user removes the water or the object being cooked from the cooking appliance 1000 after finishing cooking and puts the cooking appliance 1000 back on the heating device 2000, the determination regarding empty heating during heating may be performed, but the determination regarding empty heating during heating is not limited thereto.

[0429] In operation S2604, the heating device 2000 stops heating during the third time period while heating the cooking utensil 1000 via the transmission coil 2120. During heating and when heating is stopped during the third time period, the heating device 2000 may continuously obtain temperature information via the first temperature sensor 1041 (for measuring the internal temperature of the cooking utensil 1000) and the second temperature sensor 1042 (attached to the bracket 1034 to measure the temperature of the heater 1014). In order to save resources, the heating device 2000 may selectively obtain the temperature information only during the third time period or only during a time period including a specific time (3 seconds) immediately before the start of the third time period and the third time period.

[0430] In operation S2606, the processor 2200 of the heating device 2000 determines whether the cooking appliance 1000 is subjected to empty heating based on the relationship between the temperature of the object being cooked (water) and the temperature of the heater 1014. Fig.12 The processor 2200 of the heating device 2000 determines the empty heating in the same manner as described above. Fig.12 t 3 and t 4 The output power to the cooking appliance 1000 is stopped during the interval between the third time period (the interval between the third time period) to determine whether the cooking appliance 1000 has undergone empty heating. The length of the third time period may be set differently according to various conditions, but may be about 5 seconds. When the temperature of the bracket-water continues to increase as a result of measuring the temperature of the bracket 1034 (indirectly measuring the temperature of the heater 1014) and the temperature of the water (the internal temperature of the cooking appliance 1000) within the third time period, the processor 2200 of the heating device 2000 may determine that the cooking appliance 1000 has undergone empty heating. On the other hand, when the temperature of the bracket-water has a decreased value as a result of measuring the temperature of the bracket 1034 and the water within the third time period, the processor 2200 of the heating device 2000 may determine that the cooking appliance 1000 has not undergone empty heating. When determining idle heating, the processor 2200 of the heating device 2000 can not only determine whether the temperature of the bracket-water increases or decreases, but also determine whether the temperature of the bracket 1034 increases or decreases, and when its temperature increases, determine that idle heating is occurring, or when its temperature decreases, determine that idle heating is not occurring.

[0431] In operation S2608, when it is determined that the cooking appliance 1000 undergoes empty heating during heating, the processor 2200 of the heating device 2000 may notify the cooking appliance 1000 of the empty heating, and display information about the empty heating via the output interface 2510 of the heating device 2000 or output the information in the form of audio. When it is determined that the cooking appliance 1000 undergoes empty heating, in operation S2610, the processor 2200 of the heating device 2000 may control the inverter circuit 2113 to stop wireless power transmission to the cooking appliance 1000 via the transmission coil 2120.

[0432] When it is determined in operation S2602 that the cooking appliance 1000 undergoes empty heating, in operation S2610, the processor 2200 of the heating device 2000 performs control to stop wireless power transmission via the transmission coil 2120. In addition, in operation S2612, the processor 2200 of the heating device 2000 may transmit information indicating that the cooking appliance 1000 undergoes empty heating to a mobile device of a user or a server, and in operation S2614, after stopping heating of the cooking appliance 1000, the processor 2200 may switch the heating device 2000 to a standby state to wait for additional user input.

[0433] In addition, when it is determined in operation S2606 that the cooking appliance 1000 has not undergone empty heating, in operation S2616, the heating device 2000 may heat the cooking appliance 1000 again according to the same output condition as the output condition for heating before the determination about empty heating, and when a specific cooking condition (cooking time or receiving user input) is met, the cooking is completed.

[0434] In operation S2609, when receiving a notification indicating empty heating from the self-heating device 2000, the cooking appliance 1000 controls the relay 1007 or the thermal fuse 1008 via the controller 1020 to stop heating the heater 1014. In operation S2611, the controller 1020 of the cooking appliance 1000 may selectively output the occurrence of empty heating via the output interface 1051 (display, audio output, etc.) of the cooking appliance 1000.

[0435] Fig. 27 is a diagram illustrating an operation of a heating device interacting with a server device and a display apparatus according to an embodiment of the present disclosure.

[0436] refer to Fig. 27 According to an embodiment of the present disclosure, in addition to the cooking appliance 1000 and the heating device 2000, the cooking system 100 may further include a server device 3000 and a display device 4000. Figure 1The cooking system 100 including the cooking appliance 1000 and the heating device 2000 is described, and thus the server device 3000 and the display apparatus 4000 are described herein.

[0437] According to an embodiment of the present disclosure, the server device 3000 may include a communication interface for communicating with an external device. The server device 3000 may communicate with the cooking appliance 1000, the heating device 2000, or the display device 4000 via the communication interface. According to an embodiment of the present disclosure, the cooking appliance 1000 may send identification information or user identification information (login information and account information) about the cooking appliance 1000 to the server device 3000, and when the server device 3000 authenticates the identification information or user identification information (login information and account information) about the cooking appliance 1000, the cooking appliance 1000 may be granted access rights to the server device 3000. In addition, the heating device 2000 may send identification information or user identification information (login information and account information) about the heating device 2000 to the server device 3000, and when the server device 3000 authenticates the identification information or user identification information (login information and account information) about the heating device 2000, the heating device 2000 may be granted access rights to the server device 3000.

[0438] According to an embodiment of the present disclosure, the server device 3000 may include an AI processor. The AI ​​processor may generate an AI model for recommending a temperature control method and / or an empty heating determination method by training an artificial neural network. "Training" an artificial neural network may mean creating a mathematical model that implements the connection between neurons constituting the artificial neural network to make the best decision when appropriately changing weights based on data.

[0439] According to an embodiment of the present disclosure, the display device 4000 may be a device that is connected to the heating device 2000 and / or the server device 3000 and displays information provided by the heating device 2000 and / or the server device 3000. According to an embodiment of the present disclosure, the display device 4000 may transmit and receive information to and from the server device 3000 through a specific application (e.g., a home appliance management application) installed on the display device 4000.

[0440] According to an embodiment of the present disclosure, the display device 4000 may be a device connected to the cooking appliance 1000 and the heating device 2000 with the same account information. The display device 4000 may be directly connected to the cooking appliance 1000 and the heating device 2000 via a short-range wireless communication channel, or indirectly connected to the cooking appliance 1000 and the heating device 2000 through the server device 3000.

[0441] According to an embodiment of the present disclosure, the display device 4000 can be implemented in various forms. For example, the display device 4000 described in the present disclosure may be a mobile terminal, a refrigerator including a display, a television (TV), a computer, an oven including a display, etc., but is not limited thereto. In addition, the mobile terminal may be a smart phone, a laptop computer, a tablet personal computer (PC), a digital camera, an e-book terminal, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a Moving Picture Experts Group Stage 1 or Stage 2 (MPEG-1 or MPEG-2) Audio Layer 3 (MP3) player, etc., but is not limited thereto. For example, the mobile terminal may be a wearable device worn by a user. In the following, for ease of description, an example in which the display device 4000 is a smart phone is described.

[0442] For example, the display device 4000 or the heating device 2000 may receive a voice signal as an analog signal via a microphone, and convert a part of the voice into a computer-readable text by using an ASR model. The display device 4000 or the heating device 2000 may obtain the intention in the user's speech by interpreting the text using an NLU model. Here, the ASR model or the NLU model may be an AI model. The AI ​​model may be processed by a dedicated AI processor designed to have a hardware structure specifically for processing the AI ​​model. The AI ​​model may be created via a training process. The training process may be performed by the device itself (e.g., the display device 4000 or the heating device 2000) that executes the AI ​​or via a separate server device 3000 and / or system. Examples of learning algorithms may include, but are not limited to, supervised learning, unsupervised learning, semi-supervised learning, and reinforcement learning.

[0443] The AI ​​model may be composed of multiple neural network layers. Each of the multiple neural network layers has multiple weight values, and the neural network calculation may be performed via calculations between the calculation results in the previous layer and the multiple weight values. The multiple weight values ​​assigned to each of the multiple neural network layers may be optimized by the results of training the AI ​​model. For example, multiple weight values ​​may be refined or updated to reduce or minimize the loss or cost value obtained in the AI ​​model during training. The artificial neural network may include a deep neural network (DNN), and may be, for example, a convolutional neural network (CNN), a DNN, a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent DNN (BRDNN), or a deep Q network (DQN), but is not limited thereto.

[0444] According to an embodiment of the present disclosure, the display device 4000 may execute a specific application (e.g., a home appliance management application) provided by the server apparatus 3000 based on a user input. In this case, the user may set the order of the IH container detection operation and the small appliance detection operation via the execution window of the application, and may set the heating device 2000 to detect the empty heating of the cooking appliance 1000. Hereinafter, an operation in which the user sets the order of the IH container detection operation and the small appliance detection operation using a specific application (e.g., a home appliance management application) provided by the server apparatus 3000 is described.

[0445] Fig.28 is a diagram illustrating an operation of providing information on a heating device via a display apparatus according to an embodiment of the present disclosure.

[0446] refer to Fig.28 When the user executes an application for managing the user's home appliances on the display device 4000, the display device 4000 may receive information from the server apparatus 3000 and display a list of home appliances in the application execution window. The user's home appliances may be registered with the server apparatus 3000 via the same account. The user's home appliances may include a cooking appliance 1000 and a heating device 2000.

[0447] For example, the display device 4000 may display a list of icons representing the heating device 2000 (induction cooktop), coffee maker, toaster, refrigerator, etc. in the application execution window. In this case, the display device 4000 may receive a user input for selecting the icon 2801 representing the heating device 2000.

[0448] Fig.29 is a diagram illustrating an operation of providing a screen for setting a sequence of a detection operation and idle heating via a display device according to an embodiment of the present disclosure.

[0449] refer to Fig.29 , the display device 4000 may display a setting screen related to the heating apparatus 2000 in the application execution window in response to a user input for selecting the icon 2801 .

[0450] For example, the display device 4000 may display a first field 2902 for selecting the order of the detection operation and a second field 2903 for asking whether to determine the empty heating of the detected small appliance in the application execution window. The first field 2902 may include, but is not limited to, a GUI capable of determining the order of the small appliance detection and the IH container detection. The user may set the order of the detection operation via the first field 2902 so that the heating device 2000 may perform the small appliance detection before the IH container detection or perform the IH container detection before the small appliance detection.

[0451] A window for selecting whether the heating device 2000 will determine the empty heating of the detected small-sized electrical appliance may be displayed in the second column 2903. In this case, the user may select whether to determine the empty heating of the cooking appliance 1000 when the cooking appliance 1000 is started to be heated or whether to determine the empty heating of the cooking appliance 1000 during heating. Although not shown, a menu for determining the length of the heating cut-off time period (the second time period and the third time period) may be provided in the second column 2903 to determine the empty heating, and the user may also set the length of the heating cut-off time period via the menu. When the user does not select the heating cut-off time period (the second time period and the third time period), the cut-off time period for empty heating may be set to a default value. Depending on the type and cooking capacity of the detected small-sized electrical appliance, the processor 2200 of the heating device 2000 may automatically change the first time period (which is the initial heating time period) and the heating cut-off time period (the second time period and the third time period) from the default setting value. For example, when the length of the first time period of the cooking appliance 1000 having a cooking capacity of 800 ml is 10 seconds, the length of the first time period of the cooking appliance 1000 having a cooking capacity of 1200 ml may be changed to 13 seconds.

[0452] Fig.30 is a diagram illustrating an operation of notifying that idle heating is occurring via a display device according to an embodiment of the present disclosure.

[0453] refer to Fig.30 According to an embodiment of the present disclosure, when it is detected through the heating device 2000 in the cooking system 100 that a certain cooking utensil 1000 is experiencing empty heating, the display device 4000 can display the type and location of the cooking utensil 1000 experiencing empty heating and information indicating that the cooking utensil 1000 is experiencing empty heating.

[0454] The pot 1000c is placed on the first cooking zone at the upper left of the top plate of the heating device 2000, the coffee drip filter 1000d is placed on the third cooking zone at the right side of the top plate of the heating device 2000, and the coffee drip filter 1000d is subjected to empty heating without water inside. Information indicating that two heating zones on the heating device 2000 are currently working and that the coffee drip filter 1000d is extracting coffee is displayed in the first column 3001 of the display device 4000. In the second column 3002, the state that the first cooking zone at the upper left of the top plate of the heating device 2000 is being heated at level 9 is displayed as a graphic and a number. In the second column 3002, the graphic image (icon) at the upper left indicates which of the three cooking zones is being heated. In the third column 3003, the state that the cooking utensil 1000 is not placed on the second cooking zone at the lower left of the top plate of the heating device 2000 is displayed. In the fourth column 3004, the graphic image (icon) at the upper left indicates that the cooking utensil placed on the right cooking zone among the three heating areas is the coffee drip filter 1000d and undergoes empty heating ("no water in the drip filter"), a state of stopping heating is displayed, and a "Cancel" button is displayed so that the user can cancel the state of currently stopping heating. When the user fills the coffee drip filter 1000d with water and presses the "Cancel" button in the fourth column 3004, the heating device 2000 can resume heating the coffee drip filter 1000d.

[0455] The method according to the embodiment of the present disclosure can be implemented in the form of program commands that can be executed by various types of computers, and can be recorded on a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, etc., alone or in combination. The program commands recorded on the computer-readable recording medium may be specially designed and configured for the present disclosure, or may be known and available to ordinary technicians in the field of computer software. Examples of computer-readable recording media include magnetic media (such as hard disks, floppy disks, and tapes), optical media (such as compact disk read-only memories (CD-ROMs) and digital versatile disks (DVDs), magneto-optical media (such as floppy disks), and hardware devices (such as ROMs, random access memories (RAMs), flash memories, etc.) that are specially configured to store and execute program commands. Examples of program commands include not only machine codes (such as machine codes created by compilers), but also high-level language codes that can be executed by computers using interpreters, etc.

[0456] Some embodiments of the present disclosure may also be implemented in the form of a recording medium (such as a program module executed by a computer) including instructions that can be executed by a computer. A computer-readable recording medium may be any available medium that can be accessed by a computer, and includes both volatile and non-volatile media and both removable and non-removable media. In addition, a computer-readable recording medium may include both computer storage media and communication media. Computer storage media include volatile and non-volatile, removable and non-removable media implemented using any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Communication media typically embody computer-readable instructions, data structures, program modules, other data in a modulated data signal (such as a carrier or other transmission mechanism), and may include any information transmission medium. In addition, some embodiments of the present disclosure may also be implemented as a computer program product or computer program including computer-executable instructions.

[0457] The computer-readable storage medium may be provided in the form of a non-transitory storage medium. In this regard, the term "non-transitory storage medium" simply means that the storage medium does not include a signal (e.g., an electromagnetic wave) and is a tangible device, and the term does not distinguish between a case where data is semi-permanently stored in the storage medium and a case where data is temporarily stored in the storage medium. For example, the "non-transitory storage medium" may include a buffer for temporarily storing data.

[0458] According to an embodiment of the present disclosure, when providing a method according to an embodiment of the present disclosure, it can be included in a computer program product when providing. The computer program product can be traded as a product between a seller and a buyer. The computer program product can be distributed in the form of a computer-readable storage medium (e.g., CD-ROM), or distributed online (e.g., downloaded or uploaded) via an application store, or distributed directly between two user devices (e.g., smart phones). For online distribution, at least a portion of the computer program product (e.g., a downloadable application) can be at least temporarily stored in a computer-readable storage medium (such as a manufacturer's server, an application store's server, or a memory of a relay server) or temporarily generated in the computer-readable storage medium.

[0459] While the present disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. A wireless power transmission device, include: A wireless power transmitter comprising a transmission coil and an inverter circuit, the transmission coil being configured to wirelessly transmit power, the inverter circuit being configured to drive the transmission coil; at least one processor configured to control the inverter circuit; as well as a communication interface configured to communicate with the cooking appliance, wherein the communication interface is further configured to receive from the cooking appliance a temperature of a bottom surface of the cooking appliance and an internal temperature of the cooking appliance in a first time period and a second time period after the first time period, wherein a heating operation is performed via the transmission coil during the first time period, and the heating operation via the transmission coil is stopped during the second time period, and Wherein, the at least one processor is further configured to: controlling the inverter circuit to stop the heating operation via the transmission coil during the second time period; and Based on the relationship between the temperature of the bottom surface of the cooking utensil and the internal temperature of the cooking utensil during the second period of time, it is determined whether the cooking utensil is subjected to empty heating.

2. The wireless power transmission device according to claim 1, in, The at least one processor is further configured to determine that the cooking utensil is subjected to empty heating when a value obtained by subtracting an internal temperature of the cooking utensil from a temperature of the bottom surface increases within the second period of time.

3. The wireless power transmission device according to claim 1, in, The at least one processor is further configured to determine that the cooking utensil is not subjected to idle heating when a value obtained by subtracting an internal temperature of the cooking utensil from a temperature of the bottom surface decreases within the second period of time.

4. The wireless power transmission device according to claim 1, in, The at least one processor is further configured to determine that the cooking utensil is subjected to empty heating when a slope corresponding to a value obtained by subtracting an internal temperature of the cooking utensil from a temperature of the bottom surface has a positive value during the second period of time.

5. The wireless power transmission device according to claim 1, in, The at least one processor is further configured to determine that the cooking utensil is subjected to empty heating when a slope corresponding to a value obtained by subtracting an internal temperature of the cooking utensil from a temperature of the bottom surface is greater than a predetermined value during the second period of time.

6. The wireless power transmission device according to claim 1, in, The at least one processor is further configured to determine that the cooking utensil is subjected to idle heating when the temperature of the bottom surface of the cooking utensil increases within the second time period.

7. The wireless power transmission device according to claim 1, in, The at least one processor is further configured to control the inverter circuit to heat the cooking appliance with a predetermined power for determining no-heating instead of power corresponding to a user input during the first time period.

8. The wireless power transmission device according to claim 7, in, The communication interface is further configured to receive identification information about the cooking appliance from the cooking appliance, and The at least one processor is further configured to change the magnitude of the specific power based on the identification information about the cooking appliance.

9. The wireless power transmission device according to claim 7, in, The at least one processor is further configured to, when it is determined that the cooking appliance does not undergo idle heating, control the inverter circuit to output power corresponding to the user input after the second time period.

10. The wireless power transmission device according to claim 1, in, The at least one processor is further configured to control the inverter circuit to transmit power for communication to the cooking appliance based on a heating start input by a user.

11. The wireless power transmission device according to claim 1, in, The at least one processor is further configured to, when it is determined that the cooking appliance is experiencing the empty heating, notify the cooking appliance via the communication interface that the cooking appliance is experiencing the empty heating.

12. The wireless power transmission device according to claim 1, in, The communication interface is further configured to: receive the temperature of the bottom surface of the cooking utensil and the internal temperature of the cooking utensil within a third time period, wherein when the heating operation is performed on the cooking utensil via the transmission coil after the second time period has passed, the heating operation via the transmission coil is stopped by the at least one processor during the third time period, and The at least one processor is further configured to determine whether the cooking utensil is subjected to idle heating based on a relationship between a temperature of the bottom surface of the cooking utensil and an internal temperature of the cooking utensil during the third time period.

13. The wireless power transmission device according to claim 12, in, The at least one processor is further configured to further determine whether the cooking utensil undergoes idle heating based on a change in the temperature of the bottom surface of the cooking utensil within the third time period and a relationship between the temperature of the bottom surface and an internal temperature of the cooking utensil.

14. The wireless power transmission device according to claim 13, in, The at least one processor is further configured to determine that the cooking appliance undergoes empty heating when the temperature of the bottom surface of the cooking appliance increases and a value obtained by subtracting the internal temperature of the cooking appliance from the temperature of the bottom surface increases within the third time period.

15. The wireless power transmission device according to claim 1, further comprising: include: Output interface; as well as Multiple cooking zones, Wherein, the at least one processor is further configured to: by controlling the inverter circuit to transmit specific power to the plurality of cooking zones, and identifying at least one cooking zone where the cooking appliance is located from among the plurality of cooking zones according to a change in load; as well as When it is determined that the cooking appliance undergoes empty heating according to the determination as to whether the cooking appliance undergoes empty heating, the output interface is controlled to output the identified at least one cooking zone and information indicating whether the cooking appliance undergoes empty heating.

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