CN113453589B - Wireless induction heating cooker and wireless induction heating system comprising same - Google Patents

Abstract

A wireless induction heating system comprising: an induction heating device having a heating coil configured to generate a magnetic field; and a wireless induction heating cooker disposed in a region formed by the heating coil and configured to perform a cooking operation based on a magnetic field generated by the heating coil. The induction heating apparatus and the wireless induction heating cooker may perform mutual data communication to control the output of the heating coil and output abnormality information based on a displacement state of the wireless induction heating cooker with respect to the induction heating apparatus.

Description

Wireless induction heating cooker and wireless induction heating system comprising same

Technical Field

The present disclosure relates to a wireless induction heating system including an induction heating apparatus and a wireless induction heating cooker, which perform mutual data communication to determine an optimal displacement of the wireless induction heating cooker with respect to the induction heating apparatus to perform improved heat transfer.

Background

Some cooking devices use a wireless induction heating method. For example, the food is heated using a magnetic field generated by an induction heating device, rather than using direct heating.

Japanese patent No.5943770 (hereinafter, referred to as "prior art document") discloses an electric cooker that heats food using an induction heating method. An example of such an electric cooker is shown in fig. 1. As shown in fig. 1, the conventional electric cooker 100 'includes a liner 30' received in a liner support 14 'and an induction heating coil 15' heating the liner 30 'at the bottom of the liner support 14'. A heating power receiving coil 16 ' is provided on a bottom surface of the main body 12 ' of the electric rice cooker 10 ' to receive power from the power supply 20 ' and supply the power to the induction heating coil 15 '. In the electric cooker 100 ', an induced current is generated by the heating power receiving coil 16' based on a magnetic field generated by the heating power supplying coil 23 'provided in the power source 20'. Further, the magnetic field generated by heating the power receiving coil 16 ' generates an induction current in the induction heating coil 15 ' and is used to heat the inner container 30 '.

However, this configuration requires a first power transmission process between the heating power supply coil 23 ' and the heating power receiving coil 16 ' and a second power transmission process between the heating power receiving coil 16 ' and the induction heating coil 15 ' in order to heat the inner container 30 ', thereby increasing power (or heat) loss during both power transmission processes.

In addition, some electronic cookers may include various types of electronic devices that require power supply. However, the electric cooker 100 ' discloses only a process of heating the inner container 30 ' using the magnetic field generated by heating the power supply coil 23 ', and does not consider using, for example, the power source 20 ' to supply power to various types of electronic devices built in the cooker 100 '.

Disclosure of Invention

Technical problem

The present disclosure provides a wireless induction heating system capable of determining whether a wireless induction heating cooker is correctly positioned on an induction heating device.

The present disclosure also provides a wireless induction heating system informing a user that a wireless induction heating cooker is abnormally positioned on an induction heating apparatus.

The present disclosure also provides a wireless induction heating system that controls heat transferred to a wireless induction heating cooker based on a displacement state of the wireless induction heating cooker with respect to an induction heating device.

Advantages of the present disclosure are not limited to those mentioned herein, and other advantages of the present disclosure may be understood by implementations of the present disclosure described herein.

Technical scheme

According to some implementations of the present disclosure, the wireless induction heating system may detect a change in the amount of current passing through the heating coil of the induction heating device, and may determine whether the wireless induction heating cooker is normally or correctly disposed on the induction heating device.

In some examples, when the wireless induction heating cooker is abnormally positioned on the induction heating apparatus, the wireless induction heating system may output abnormality information through at least one of the wireless induction heating cooker and the induction heating apparatus, thereby informing a user that the wireless induction heating cooker is abnormally positioned with respect to the induction heating apparatus.

In some examples, the wireless induction heating system may control the output of the heating coil based on the displacement state of the wireless induction heating cooker to control the amount of heat transferred to the wireless induction heating inner container.

Advantageous effects

According to some implementations of the present disclosure, the wireless induction heating system may determine whether the wireless induction heating cooker is normally positioned on the induction heating apparatus, and identify a differential displacement of the wireless induction heating cooker that will cause deterioration of cooking performance, without user identification.

In some examples, the wireless induction heating system may inform the user that the wireless induction heating cooker is abnormally positioned on the induction heating apparatus, thereby allowing the user to correctly position the wireless induction heating cooker on the induction heating apparatus and preventing the rice cooking performance from being deteriorated, which may be caused by a differential displacement of the wireless induction heating cooker.

In some examples, the wireless induction heating system may control the amount of heat transferred to the wireless induction heating cooker based on a mutual displacement state between the wireless induction heating cooker and the induction heating device, thereby preventing a safety problem that may be caused by a differential displacement of the wireless induction heating cooker.

Drawings

Fig. 1 is a side sectional view of an electric cooker in the related art.

Fig. 2 shows an example wireless induction heating cooker operating on an induction heating device.

Fig. 3 is a side sectional view of the wireless induction heating cooker shown in fig. 2.

Fig. 4A and 4B respectively show example displacements of the first power receiving coil.

Fig. 5 is an enlarged view of the power transmitting coil and the second power receiving coil shown in fig. 2.

Fig. 6 shows an example control flow of the wireless induction heating cooker operating on the induction heating apparatus.

Fig. 7 illustrates an example wireless induction heating system.

Fig. 8 illustrates an example control flow of the wireless induction heating system shown in fig. 7.

Fig. 9 is a flow chart of an example process of operating an induction heating apparatus.

Fig. 10 is a flowchart of an example process of operating the wireless induction heating cooker.

Detailed Description

Some implementations of the present disclosure are described in detail with reference to the accompanying drawings. Detailed descriptions of well-known technologies related to the present disclosure may be omitted if they unnecessarily obscure the subject matter of the present disclosure. The same reference numbers may be used to refer to the same or similar components.

In this document, the terms "upper", "lower", "on …", "below …", etc. are used so that in the case where a first component is arranged on "upper" or "lower" of a second component, the first component may be arranged in contact with the upper or lower surface of the second component, or another component may be disposed between the first component and the second component. Similarly, where a first component is disposed on or under a second component, the first component may be disposed directly on or under (in contact with) the second component, or one or more other components may be disposed between the first and second components.

Further, the terms "connected," "coupled," and the like are used such that, where a first component is connected or coupled to a second component, the first component may be directly connected or connectable to the second component, or one or more additional components may be disposed between the first component and the second component, or the first component and the second component may be connected or coupled by one or more additional components.

In general, the present disclosure relates to a wireless induction heating system comprising an induction heating device and a wireless induction heating cooker, which may communicate with each other to achieve an optimal displacement of the heating cooker relative to the heating device for heat transfer.

Referring to fig. 2-6, example wireless induction heating cookers according to some implementations of the present disclosure are described. Fig. 2 shows an example wireless induction heating cooker operating on an induction heating device. Fig. 3 is a side sectional view of the wireless induction heating cooker shown in fig. 2. Fig. 4A and 4B respectively show example displacements of the first power receiving coil. Fig. 5 is an enlarged view of the power transmitting coil and the second power receiving coil shown in fig. 2. Fig. 6 shows an example control flow of the wireless induction heating cooker operating on the induction heating apparatus.

In some implementations, the wireless induction heating cooker of the present disclosure may be disposed on an induction heating device and perform a cooking operation using a magnetic field generated by a heating coil of the induction heating device.

Referring to fig. 2 and 3, in some implementations, the wireless induction heating cooker 100 includes a body 110, a cover 120, a liner 130, a first power receiving coil 140a, a power transmitting coil 150, a side heating coil 160, and a second power receiving coil 140 b. The lid 120 includes a controller 121, a communicator 122, a display 123, a steam vent 124, a pressure weight 125, and a noise reducer 126. The wireless induction heating cooker 100 may include additional components not shown in fig. 2 and 3, and one or more of the illustrated components of the wireless induction heating cooker 100 are removed or modified as necessary.

In some implementations, the wireless induction heating cooker 100 may be operable on any induction heating device configured to heat an object by electromagnetic induction.

As shown in fig. 2 and 3, the wireless induction heating cooker 100 may be operated while being placed on the top plate 220 of the induction heating device including the heating coil 210. In some examples, the wireless induction heating cooker 100 may be operated while being placed on the top plate 220 and vertically arranged above the heating coil 210.

A main Printed Circuit Board (PCB) of the induction heating apparatus may control a current flowing through the heating coil 210 so that the heating coil 210 generates a magnetic field. The magnetic field generated by the heating coil 210 may induce a current in the inner container 130 and the first power receiving coil 140a described below.

In implementations, the body 110 may be configured to support the lower and side portions of the wireless induction heating cooker 100. For example, the body 110 may have a cylindrical shape with an open top. Food can be cooked inside the body 110. In some examples, the body 110 can receive the liner 130. Various types of grains (e.g., rice) can be heated and cooked in the inner container 1 received in the main body 110.

The cover 120 is configured to seal an upper portion of the wireless induction heating cooker 100, and may be fastened to an upper surface of the body 110. For example, the cover 120 may be fastened to the body 110 and configured to open and close with respect to an upper surface of the body 110.

In one example, the cover 120 may be coupled to the body 110 using a hinge such that the cover 120 may be selectively opened and closed. In some examples, the cover 120 is coupled to a hinge shaft provided on an upper surface of the body 110, and may be selectively opened and closed with respect to the upper surface of the body 110 when the cover 120 rotates about the hinge shaft.

In another example, the cover 120 may be detachably coupled to the body 110. In some examples, the cover 120 may be coupled to the upper surface of the body 110 by a plurality of fastening members at the upper edge of the body 110. For example, the cover 120 may be completely separated from the body 110. The cover 120 completely separated from the body 110 can be easily cleaned.

In some examples, as shown in fig. 2 and 3, the cover 120 may include at least one electronic device. For example, the cover 120 includes a controller 121 controlling the overall operation of the wireless induction heating cooker 100, a communicator 122 performing data communication with the induction heating device, and a display 123 visually outputting status information related to the wireless induction heating cooker 100. In some examples, the lid 120 may also include a battery to power the controller 121, the communicator 122, the display 123, and/or any other suitable electronic device in the lid 120.

In some implementations, the controller 121, the communicator 122, and the display 123 can be implemented using a Printed Circuit Board (PCB) including a plurality of Integrated Circuits (ICs).

In some examples, the lid 120 may include a pressure weight 125 configured to maintain a constant internal pressure of the wireless induction heating cooker 100. The cover 120 may include a noise reducer 126, and the noise reducer 126 may include a sound absorbing member to reduce noise during steam venting. In some examples, the lid 120 may include a steam vent 124 (e.g., a solenoid valve), the steam vent 124 being configured to vent internal steam of the wireless induction heating cooker 100 to an exterior of the wireless induction heating cooker 100. The steam exhauster 124 may be operated based on a specific control signal (e.g., a control signal output by the controller 121).

The inner container 130 may be received in the main body 110 and heated by a magnetic field generated by the heating coil 210 of the induction heating device. The inner container 130 may have a shape corresponding to the inner storage space of the body 110. For example, in some cases where the body 110 has a cylindrical shape, the inner bladder 130 may also have a cylindrical shape with an upper surface open.

When the wireless induction heating cooker 100 is placed on the induction heating apparatus, the lower surface of the inner container 130 and the heating coil 210 may be opposite to each other, and the bottom surface of the body 110 may be disposed between the lower surface of the inner container 130 and the heating coil 210. When the current flows through the heating coil 210, a magnetic field is generated around the heating coil 210 and the current may be induced in the inner bladder 130, so that joule heat may be generated in the inner bladder 130 based on the induced current.

The inner container 130 may be made of a magnetic material in order to generate an induced current. For example, the inner container 130 may be made of iron (Fe) -containing cast iron. Additionally or alternatively, the liner 130 may be made of a clad of iron (Fe), aluminum (Al), stainless steel, and/or other suitable material combinations.

In some examples, the width of the bottom surface of the inner bladder 130 may be narrower than the width of the heating coil 210. In other words, in the case where the heating coil 210 is a circular plate coil and the inner container 130 has a cylindrical shape, the radius of the bottom surface of the circular inner container 130 may be smaller than the coil radius (Rc) (the distance between the center of the heating coil 210 and the outer circumferential surface of the heating coil 210). In some cases where the width of the bottom surface of the inner container 130 is narrower than the width of the heating coil 210, all of the magnetic field generated by the heating coil 210 may be transmitted to the bottom surface of the inner container 130 without leakage in the region where the inner container 130 is disposed.

In some implementations, the first power receiving coil 140a may be disposed on a bottom surface of the body 110. An electric current may be induced in the first power receiving coil 140a based on the magnetic field generated by the heating coil 210.

The first power receiving coil 140a may be configured in a ring shape having a predetermined inner diameter and a predetermined outer diameter. The first power receiving coil 140a may be disposed at any position of the bottom surface of the body 110. In some implementations, in order to maximize the heating efficiency of the inner container 130 due to the electromagnetic induction phenomenon, the first power receiving coil 140a is preferably disposed in parallel with the heating coil 210 at a lower portion of the border region of the inner container 130.

The edge region may be a region defined in a radial direction with respect to a central vertical line of the inner bladder 130, and may be a region adjacent to the cylindrical surface of the inner bladder 130. In other words, the rim area can be adjacent to the circumference of the bladder 130 when the bladder 130 is viewed from the top. The edge region of the liner 130 is described in detail below with reference to fig. 4A and 4B.

Referring to fig. 4A, the bottom surface of the inner container 130 may include a plate area FA parallel to the heating coil 210 and a border area RA connecting the plate area FA and the side surface of the inner container 130.

Corners (hereinafter, rounded portion RA) of the bottom surface of the inner container 130 may be rounded to facilitate the removal of the food after the cooking of the food is completed. Accordingly, the bottom surface of the inner container 130 may include a panel area FA, which is flat and parallel to the heating coil 210, and a circular portion RA, which is rounded to connect the bottom surface of the inner container 130 and the side surface of the inner container 130.

In one example, as shown in fig. 4A, the edge area RA of the liner 130 can be a circular portion RA. In this example, the first power receiving coil 140a may be disposed below the edge area RA of the inner bladder 130 in the horizontal direction (i.e., below the circular portion RA).

In more detail, a plate area FA of the bottom surface of the inner container 130 may be formed within the first reference radius Rf1 with respect to the center vertical line HL of the inner container 130, and an edge area RA of the inner container 130 may be formed between the outer diameter Ro of the inner container 130 and the first reference radius Rf 1.

In this configuration, the first power receiving coil 140a may be disposed between the outer diameter Ro of the inner bladder 130 and the first reference radius Rf 1. In other words, the horizontal displacement range of the first power receiving coil 140a may be a range between the outer diameter Ro of the inner bladder 130 and the first reference radius Rf 1.

Referring back to fig. 4A, in an embodiment in which the distance between the border area RA and the heating coil 210 is greater than the distance between the plate area FA and the heating coil 210, the amount of heat caused by the magnetic field generated by the heating coil 210 and transferred to the border area RA may be relatively less than the amount of heat caused by the magnetic field generated by the heating coil 210 and transferred to the plate area FA. Accordingly, the first power receiving coil 140a disposed below the border area RA may operate to allow the border area RA to receive power from the heating coil 210 without significant loss of total heat transfer with respect to the inner bladder 130.

In other examples, referring to fig. 4B, the edge region RA of the liner 130 may be vertically formed outside the liner 130. In some examples, the edge region RA of the liner 130 can be formed between the outer diameter Ro of the liner 130 and the second reference radius Rf 2.

Accordingly, the first power receiving coil 140a may be vertically disposed outside the inner container 130. In other words, the first power receiving coil 140a may have an inner diameter Rci of the first power receiving coil 140a that is greater than the outer diameter Ro of the inner bladder 130 and may be disposed below the inner bladder 130.

However, in order to effectively generate an induced current in the first power receiving coil 140a, the outer diameter Rco of the first power receiving coil 140a may be smaller than the coil radius Rc of the heating coil 210.

In other words, as shown in fig. 4B, the inner diameter Rci of the first power receiving coil 140a is larger than the outer diameter Ro of the inner container 130, and the outer diameter Rco of the first power receiving coil 140a is smaller than the coil radius Rc of the heating coil 210, and thus, the area formed by the first power receiving coil 140a may be entirely disposed perpendicularly with respect to the area formed by the heating coil 210. Therefore, in the example shown in fig. 4B, the magnetic field generated by the heating coil 210 may be transmitted to the first power receiving coil 140a without leakage in the region where the first power receiving coil 140a is disposed.

In some implementations, the first power receiving coil 140a is disposed below an edge region that does not provide thermal conduction perpendicular to the inner bladder 130. The first power receiving coil 140a is configured and arranged to receive power from the heating coil 210 so that the amount of heat transferred to the inner container 130 does not deteriorate.

According to the present disclosure, some implementations of wireless induction heating cookware use a magnetic field generated in an area where heat transfer efficiency with respect to the inner bladder is low as a power source for one or more internal electronic devices. Using the magnetic field generated in the area where the heat transfer efficiency is low as a power source for the internal electronic device can improve the efficiency of using the power wirelessly supplied for the cooking operation from the induction heating device.

In some examples, the side heating coil 160 is vertically disposed on the outer circumferential surface of the inner container 130. The side heating coil 160 may be connected to the first power receiving coil 140a to heat the inner container 130 based on the current induced in the first power receiving coil 140 a.

Referring to fig. 2 and 3, the side heating coil 160 may be wound around the outer circumferential surface of the inner container 130 and may be in contact with the outer circumferential surface of the inner container 130. In some cases, a liner support member can be disposed in the body 110 to support the liner 130. For example, the liner support member may support the outer circumferential surface of the liner 130 and the bottom surface of the liner 130. In this example, the side heating coil 160 may be provided on the inner bladder support member.

The side heating coil 160 may be vertically disposed. In some examples, the side heating coil 160 includes a plurality of layers corresponding to the number of turns thereof, and the layers of the side heating coil 160 may be vertically disposed side by side along the outer circumferential surface of the inner bladder 130.

In some implementations, the side heating coil 160 may be electrically connected to the first power receiving coil 140 a. For example, a first end of the side heating coil 160 may be connected to a first end of the first power receiving coil 140 a. In this configuration, the first power receiving coil 140a and the side heating coil 160 may be configured as a single metal lead wire, and the first power receiving coil 140a and the side heating coil 160 may be distinguished from each other by their positions and functions described herein.

In the case where the side heating coil 160 is electrically connected to the first power receiving coil 140a, the current induced in the first power receiving coil 140a may flow through the side heating coil 160. The current flowing through the side heating coil 160 generates a magnetic field in the side heating coil 160, and the magnetic field generated in the side heating coil 160 induces a current in the outer circumferential surface of the inner container 130, thereby heating the inner container 130 (e.g., the side surface of the inner container 130).

In implementations in which the first power receiving coil 140a is disposed below the border area RA where the heating coil provides reduced heat or does not transfer heat vertically, the current induced by the heating coil 210 and generated in the side heating coil 160 may prevent a reduction in the total amount of heat generated at the inner bladder 130.

In some examples, the number of turns of the side heating coil 160 may be greater than that of the first power receiving coil 140a to improve efficiency in heating operation.

As described with reference to fig. 4A and 4B, the first power receiving coil 140a may generate an induced current and transmit the generated induced current to the side heating coil 160 while minimizing or preventing a reduction in heat generated at the inner bladder 130.

Alternatively or additionally, side heating coils 160 can be provided and configured to heat a wider area of the outer peripheral surface of liner 130 than side heating coils 160 shown in fig. 4A and 4B.

In some implementations, the first power receiving coil 140a may have a relatively narrow horizontal width to minimize reduction of heat generation with respect to the inner container 130, and the side heating coil 160 may have a relatively greater vertical width to widely surround the outer circumferential surface of the inner container 130.

In the case where the thickness of the metal lead wire of the first power receiving coil 140a is the same as that of the side heating coil 160, the horizontal width of the first power receiving coil 140a and the vertical width of the side heating coil 160 may be proportional to the number of turns of the coils 140 and 160, respectively. In this example, the number of turns of the first power receiving coil 140a may be relatively smaller than that of the side heating coil 160, so that the width of the first power receiving coil 140a is relatively small and the width of the side heating coil 160 is relatively large.

According to some implementations of the present disclosure, the bottom surface of the inner container and the side surface of the inner container may be heated based on the magnetic field generated by the heating coil, thereby providing a plurality of heat transfer paths based on a single heat source and achieving temperature uniformity of the inner container.

In some examples, in a case where the first power receiving coil 140a and the side heating coil 160 are provided to the inner container 130 as described herein, the total impedance value (| Z |) of the wireless induction heating cooker 100 may be a combination of the impedance value of the inner container 130 and the impedance value of the first power receiving coil 140a and the side heating coil 160.

Therefore, when the first power receiving coil 140a and the side heating coil 160 are used for the inner pot 130, the total resistance value (| Z |) of the wireless induction heating cooker 100 is reduced, and the output of the heating coil 210 transmitted toward the inner pot 130 may also be reduced due to the reduction of the total resistance value (| Z |).

In order to prevent such a decrease in output, the second end of the first power receiving coil 140a and the second end of the side heating coil 160 may be electrically connected to each other through the resonance capacitor Cr.

The first power receiving coil 140a, the side heating coil 160, and the resonance capacitor Cr may form an LC resonance circuit, and the LC resonance circuit may be magnetically coupled to the heating coil 210 based on a resonance frequency. In this case, when the total impedance value (| Z |) of the wireless induction heating cooker 100 becomes the maximum impedance level, the maximum level of output transmitted from the heating coil 210 toward the inner container 130 may also be provided.

In some implementations, the power transmitting coil 150 may be disposed at one side of the upper portion of the main body 110 to receive the current induced in the first power receiving coil 140a to generate a magnetic field.

Referring to fig. 3, the power transmitting coil 150 may be supported by any suitable support member and fixedly disposed at one side of the upper portion of the main body 110. The power transmission coil 150 may be disposed in contact with one side of the main body 110 to minimize the size of the wireless induction heating cooker 100.

In some examples, the power transmitting coil 150 may have a plate shape, and may be horizontally disposed at one side of the body 110 to face the second power receiving coil 140b described below. That is, the power transmitting coil 150 may protrude perpendicularly from one side of the body 110.

For example, the power transmission coil 150 may be disposed along an outer surface of the body 110 at one side of an upper portion of the body 110.

Referring to fig. 5, when the body 110 has a cylindrical shape, the power transmission coil 150 may be disposed along an outer circumferential surface of the body 110 at one side of an upper portion of the body 110. In some examples, the power transmitting coil 150 may be in contact with the outer circumferential surface of the body 110 within a predetermined arc length. Accordingly, the power transmitting coil 150 may have a deformed elliptical shape such that the length of the long axis adjacent to the body 110 is within the preset circular arc length.

Alternatively, when the body 110 has a square pillar shape, the power transmission coil 150 may be disposed along an outer surface of the body 110 at one side of an upper portion of the body 110. For example, the power transmitting coil 150 may have a rectangular shape such that a horizontal length adjacent to the body 110 is within a preset length, and may also have an elliptical shape such that a length of a major axis adjacent to the body 110 is within a preset circular arc length.

The power transmitting coil 150 may be electrically connected to the first power receiving coil 140 a. Since the power transmitting coil 150 is electrically connected to the first power receiving coil 140a, the current induced in the first power receiving coil 140a may flow through the power transmitting coil 150. The current flowing through the power transmitting coil 150 may generate a magnetic field.

In some examples, according to the present disclosure, the wireless induction heating cooker 100 may further include a first power conversion circuit 170, and the first power conversion circuit 170 transmits the current induced in the first power receiving coil 140a to the power transmitting coil 150.

Referring to fig. 2, 3 and 5, the first power conversion circuit 170 may be or may include a packaged integrated circuit, and may be disposed at one side of the body 110. In some examples, the first power conversion circuit 170 may be fixed to a side of the body 110 below the power transmitting coil 150.

Referring to fig. 6, an input terminal of the first power conversion circuit 170 may be connected to the first power receiving coil 140a, and an output terminal of the first power conversion circuit 170 may be connected to the power transmitting coil 150. Accordingly, the first power conversion circuit 170 may convert the current induced in the first power receiving coil 140a into a stable Alternating Current (AC) and may supply the AC to the power transmitting coil 150.

The amount of current induced in the first power receiving coil 140a may vary according to the output of the heating coil 210 and the load amount of the inner container 130 (e.g., the amount of moisture and food contained in the food). In some examples, the amount of current induced in the first power receiving coil 140a may vary according to the relative position between the heating coil 210 and the wireless induction heating cooker 100 (e.g., the degree of position matching between the heating coil 210 and the wireless induction heating cooker 100).

In order to minimize the change in the amount of current, the first power conversion circuit 170 stores the current induced in the first power receiving coil 140a as a predetermined voltage, converts the stored voltage into a stable AC current, and supplies the stable AC to the power transmitting coil 150. Accordingly, the power transmitting coil 150 may receive AC of a predetermined frequency to generate a magnetic field.

In some implementations, the second power receiving coil 140b is disposed at one side of the cover 120 and may provide a current induced based on the magnetic field generated by the power transmitting coil 150 to the at least one electronic device.

Referring to fig. 3, the second power receiving coil 140b may be supported by any suitable support member and fixedly disposed at one side of the cover 120. The second power receiving coil 140b may be in contact with a side surface of the cover 120 to minimize the size of the wireless induction heating cooker 100.

In some examples, the second power receiving coil 140b may have a plate shape similar to the power transmitting coil 150, and may be horizontally disposed at a side surface of the cover 120 to face the power transmitting coil 150. That is, the second power receiving coil 140b may protrude perpendicularly from the side surface of the cover 120.

In one example, the second power receiving coil 140b may be disposed along an outer surface of the cover 120 at one side of the cover 120.

Referring to fig. 5, when the cover 120 has a cylindrical shape, the second power receiving coil 140b may be disposed along an outer circumferential surface of the cover 120 at one side of the cover 120. In some examples, the second power receiving coil 140b may be in contact with the outer circumferential surface of the cover 120 within a preset arc length. Accordingly, the second power receiving coil 140b may have a deformed elliptical shape such that the length of the major axis adjacent to the cover 120 is within the preset circular arc length.

Alternatively, in the case where the cover 120 has a square pillar shape, the second power receiving coil 140b may be disposed along an outer surface of the cover 120 at one side of the cover 120. For example, the second power receiving coil 140b may have a rectangular shape such that a horizontal length adjacent to the cover 120 is within a preset length, and may also have an elliptical shape such that a length of a long axis adjacent to the cover 120 is within a predetermined circular arc length.

In some examples, the second power receiving coil 140b may be disposed at a position corresponding to the power transmitting coil 150 at one side of the cover 120.

An induced current may be generated by the second power receiving coil 140b based on the magnetic field generated by the power transmitting coil 150. In order to maximize the amount of current generated by the second power receiving coil 140b, the second power receiving coil 140b may be disposed at a position corresponding to the position of the power transmitting coil 150. In some examples, the second power receiving coil 140b may face the power transmitting coil 150 at a position that allows the second power receiving coil 140b to magnetically couple to the power transmitting coil 150 with a maximum coupling factor.

In one example, the second power receiving coil 140b may vertically overlap the power transmitting coil 150.

In some examples, at least a portion of the second power receiving coil 140b may completely overlap the power transmitting coil 150. In other words, when the wireless induction heating cooker 100 is viewed from the top, a part or the entire region of the second power receiving coil 140b may be included in the region formed by the power transmitting coil 150. In some implementations, to magnetically couple the second power receiving coil 140b and the power transmitting coil 150 at a maximum coupling factor, the second power receiving coil 140b may be entirely included in the region formed by the power transmitting coil 150.

Referring to fig. 5, in some implementations, the second power receiving coil 140b and the power transmitting coil 150 may have the same size and shape. In this case, the second power receiving coil 140b may be vertically completely overlapped with the power transmitting coil 150. In other words, the second power receiving coil 140b and the power transmitting coil 150 have the same size and shape and may be spaced apart from each other at the same horizontal position by a predetermined vertical distance. For example, the second power receiving coil 140b may be provided in the cover 120, and the power transmitting coil 150 may be provided in the body 110.

In other implementations, the area of the second power receiving coil 140b may be smaller than the area of the power transmitting coil 150. In this case, the second power receiving coil 140b may be vertically entirely included in the region formed by the power transmitting coil 150. In some examples, as shown in fig. 5, in a case where the second power receiving coil 140b and the power transmitting coil 150 each have a deformed elliptical shape such that the center of the circular arc of the second power receiving coil 140b with respect to the long axis of the second power receiving coil 140b is the same as the power transmitting coil 150, the length of the long axis of the second power receiving coil 140b may be smaller than the length of the long axis of the power transmitting coil 150.

The above-described structural features allow the maximum amount of current to be induced in the second power-receiving coil 140b, and the second power-receiving coil 140b can supply the induced current to the electronic devices within the cover 120.

Referring to fig. 6, the second power receiving coil 140b may be electrically connected to a plurality of electronic devices within the cover 120. Accordingly, the plurality of electronic devices may receive the induced current generated in the second power receiving coil 140b as a power source.

The plurality of electronic devices may operate based on the power supplied by the second power receiving coil 140 b. For example, the controller 121 controls the overall operation of the wireless induction heating cooker 100 (e.g., the steam discharge and blocking operation of the steam discharger 124) based on the power received from the second power receiving coil 140 b. In some examples, the communicator 122 may perform data communication with the communicator 240 of the induction heating apparatus based on the power received from the second power receiving coil 140 b. In some examples, the display 123 may visually output status information related to the wireless induction heating cooker 100 based on the power received from the second power receiving coil 140 b.

In some examples, as shown in fig. 6, the wireless induction heating cooker 100 may further include a second power conversion circuit that transmits the current induced in the second power receiving coil 140b to one or more of the plurality of electronic devices in the cover 120.

Referring to fig. 2 and 3, the second power conversion circuit 180 may be or may include a packaged integrated circuit and may be disposed in the cover 120. Referring back to fig. 6, the input terminal of the second power conversion circuit 180 may be connected to the second power receiving coil 140b, and the output terminal of the second power conversion circuit 180 may be connected to each electronic device in the cover 120. Accordingly, the second power conversion circuit 180 can convert the current induced in the second power receiving coil 140b into a stable DC voltage and supply it to the respective electronic devices.

In some examples, AC may be induced in the second power receiving coil 140 b. In some examples, each electronic device may receive a DC voltage having a predetermined magnitude as a power source according to specifications and operate using the same.

The second power conversion circuit 180 converts the current induced in the second power receiving coil 140b into a DC voltage and stores the DC voltage. The second power conversion circuit 180 may boost or reduce the stored DC voltage to output a DC voltage having a predetermined magnitude that meets the specification of each electronic device. The second power conversion circuit 180 may transmit the DC voltage thus adjusted to each electronic device.

Accordingly, each electronic device (e.g., the controller 121, the communicator 122, the display 123, etc.) may operate based on a DC voltage suitable for the specification of each electronic device itself.

According to the present disclosure, the wireless induction heating cooker may wirelessly receive power from an induction heating device and perform a cooking operation (e.g., heating food) and other operations for user convenience without connecting an external power supply and an internal battery.

In some examples, referring to fig. 6, the wireless induction heating cooker 100 of the present disclosure may further include a battery 190 storing the current induced in the second power receiving coil 14.

The battery 190 may be disposed in the cover 120 and configured to store the current induced in the second power receiving coil 140b as backup power. The second power conversion circuit 180 is operable to charge the battery 190 by controlling the magnitude of the current induced in the second power receiving coil 140 b.

The battery 190 may be electrically connected to one or more of the plurality of electronic devices within the cover 120, and each connected electronic device may operate by receiving power from the battery 190. In some examples, one or more of the plurality of electronic devices may operate based on the DC voltage output from the second power conversion circuit 180. When DC power is not provided from the second power conversion circuit 180, the one or more electronic devices may operate by receiving DC voltage from the battery 190.

A wireless induction heating system according to some implementations of the present disclosure is described in detail with reference to fig. 7-10.

Fig. 7 illustrates an example wireless induction heating system. Fig. 8 illustrates an example control flow of the wireless induction heating system shown in fig. 7.

Fig. 9 is a flowchart illustrating an example operation of the induction heating apparatus 200. Fig. 10 is a flowchart showing an example operation process of the wireless induction heating cooker 100.

Referring to fig. 7, an example wireless induction heating system 1 may include an induction heating apparatus 200 and a wireless induction heating cooker 100 operating on the induction heating apparatus 200. The induction heating device 200 and the wireless induction heating cooker 100 of the wireless induction heating system 1 may be configured similarly to those described with reference to fig. 2 to 6. Differences from those described in fig. 2 to 6 are mainly described below.

The induction heating device 200 may generate a magnetic field by the heating coil 210, and the wireless induction heating cooker 100 may be disposed in an area formed by the heating coil 210 and may be operated using the magnetic field generated by the heating coil 210.

The region formed by the heating coil 210 may be a minimum region that may include all portions of the heating coil 210. For example, in the case where the heating coil 210 is a circular plate coil, the area of the region formed by the heating coil 210 may be a circle having a coil radius corresponding to the distance between the center of the heating coil 210 and the outer circumferential surface of the heating coil 210.

Referring to fig. 7 and 8, in some implementations, the induction heating device 200 may include a heating coil 210, a controller 230, a communicator 240, a display 250, and a knob switch 260. The induction heating device 200 may include additional components, modifying or removing one or more of the illustrated components of the induction heating device 200.

The controller 230 may control the heating coil 210 and the display 250. In some examples, the controller 230 may control the output of the heating coil 210, and the display 250 may control output of status information related to the induction heating apparatus 200. In addition, the display 250 may output the following abnormality information.

The knob switch 260 may be disposed on an upper surface of the induction heating apparatus 200 and configured to send a signal to the controller 230 based on a degree of rotation thereof. The controller 230 may determine the output of the heating coil 210 based on the signal received from the knob switch 260. In other words, the output of the heating coil 210 may be controlled based on the degree of rotation of the knob switch 260.

In some examples, the wireless induction heating cooker 100 may be placed in an area formed by the heating coil 210 and operated. In some examples, the region formed by the bottom surface of the wireless induction heating cooker 100 may be positioned in the region formed by the heating coil 210.

The wireless induction heating cooker 100 may perform a cooking operation based on the magnetic field generated by the heating coil 210. The cooking operation of the wireless induction heating cooker 100 may include heating food by heating the inner container. In addition, the heating operation may include the overall operation of the controller 121, the communicator 122, the display 123, and other suitable components in the wireless induction heating cooker 100.

The induction heating apparatus 200 and the wireless induction heating cooker 100 can perform mutual data communication based on the displacement state of the wireless induction heating cooker 100 with respect to the induction heating apparatus 200. Such mutual data communication between the induction heating apparatus 200 and the wireless induction heating cooker 100 may control the output of the heating coil 210 and output abnormality information.

For example, the displacement state of the wireless induction heating cooker 100 may include a normal displacement state and an abnormal displacement state.

In one example, when the horizontal distance between the central vertical line of the heating coil 210 and the central vertical line of the wireless induction heating cooker 100 is within a predetermined distance, the displacement state of the wireless induction heating cooker 100 may be a normal displacement state. When the horizontal distance between the central vertical line of the heating coil 210 and the central vertical line of the wireless induction heating cooker 100 exceeds a preset distance, the displacement state of the wireless induction heating cooker 100 may be an abnormal displacement state.

Alternatively or additionally, when the region formed by the bottom surface of the wireless induction heating cooker 100 is completely included in the region formed by the heating coil 210, the displacement state of the wireless induction heating cooker 100 may be a normal displacement state. When the region formed by the bottom surface of the wireless induction heating cooker 100 is not completely included in the region formed by the heating coil 210, the displacement state of the wireless induction heating cooker 100 may be in an abnormal displacement state.

The induction heating apparatus 200 and the wireless induction heating cooker 100 may perform data communication based on the displacement state of the wireless induction heating cooker 100. One or both of the induction heating apparatus 200 and the wireless induction heating cooker 100 may output abnormality information. In some examples, the induction heating device 200 may control the output of the heating coil 210 based on the displacement state.

The abnormality information may include any information indicating that the wireless induction heating cooker 100 is not properly set with respect to the induction heating device 200. The exception information may be in various formats, such as visual or auditory information. For example, the abnormality information may include text and voice information requesting the user to change the position of the wireless induction heating cooker 100.

An example operation of the induction heating apparatus 200 based on the displacement state of the wireless induction heating cooker 100 is described below.

The induction heating apparatus 200 may determine the displacement state of the wireless induction heating cooker 100 based on the change in the amount of current passing through the heating coil 210. For example, referring to fig. 8, the controller 230 may detect the amount of current passing through the heating coil 210. Any suitable current sensor or current detection circuit may be used so that the controller 230 may detect the amount of current passing through the heating coil 210. The controller 230 may detect the amount of current passing through the heating coil 210 during a preset time period and may calculate a change in the amount of current between a previous time period and a current time period. The controller 230 may perform such detection and calculation at each time period.

Various external factors may cause the position of the wireless induction heating cooker 100 to be changed from the normal displacement state, so that the displacement state of the wireless induction heating cooker 100 is changed from the normal displacement state to the abnormal displacement state.

When the displacement state of the wireless induction heating cooker 100 is changed to the abnormal displacement state, the degree to which the heating coil 210 is matched with the wireless induction heating cooker 100 is reduced, and the amount of current passing through the heating coil 210 may also be reduced. Accordingly, the controller 230 may determine the displacement state of the wireless induction heating cooker 100 by comparing the change in the amount of current passing through the heating coil 210 with the reference value.

For example, when the variation in the amount of current passing through the heating coil 210 is less than or equal to the reference value, the controller 230 may determine the displacement state of the wireless induction heating cooker 100 as the normal displacement state. The controller 230 may determine the setting state of the wireless induction heating cooker 100 as an abnormal displacement state if the variation of the amount of current passing through the heating coil 210 exceeds a reference value.

According to the present disclosure, the wireless induction heating system determines whether the wireless induction heating cooker is normally set on the induction heating apparatus, and determines an abnormal displacement state of the wireless induction heating cooker, which causes deterioration of cooking performance, without user recognition.

When the displacement state of the wireless induction heating cooker 100 is the normal displacement state, the induction heating device 200 may maintain the output of the heating coil 210. When the displacement state of the wireless induction heating cooker 100 is the abnormal displacement state, the output of the heating coil 210 may be decreased.

In some examples, when the displacement state of the wireless induction heating cooker 100 is the normal displacement state, the controller 230 may not additionally control the heating coil 210. Therefore, the output of the heating coil 210 can be maintained unchanged. When the displacement state of the wireless induction heating cooker 100 is the abnormal displacement state, the controller 230 controls the inverter of the induction heating device 200 to reduce the magnitude of the current supplied to the heating coil 210. Therefore, the output of the heating coil 210 may be reduced.

In some examples, based on the displacement state of the wireless induction heating cooker 100 being the abnormal displacement state, the induction heating apparatus 200 determines the communication state with the wireless induction heating cooker 100, and outputs the abnormality information based on the determined communication state or may control the wireless induction heating cooker 100 to output the abnormality information.

Referring to fig. 8, the wireless induction heating cooker 100 may perform data communication with the induction heating device 200 based on the current induced by the magnetic field generated by the heating coil 210.

In some examples, the wireless induction heating cooker 100 may include a receiving coil 140 that induces current based on the magnetic field generated by the heating coil 210. The wireless induction heating cooker 100 may operate the communicator 122 based on the current induced in the receiving coil 140. The receiver may be at least one of the first power receiving coil 140a and the second power receiving coil 140b described with reference to fig. 2 to 6.

The communicator 122 of the wireless induction heating cooker 100 may operate as a power source based on the current induced in the receiving coil 140. The communicator 122 may operate using only the current induced in the receive coil 140. Accordingly, the communicator 122 may perform data communication at a high communication rate when the displacement state of the wireless induction heating cooker 100 is the normal displacement state.

When the displacement state of the wireless induction heating cooker 100 is the abnormal displacement state, the communicator 240 of the induction heating apparatus 200 may transmit a communication request signal to the communicator 122 of the wireless induction heating cooker 100. The communicator 122 of the wireless induction heating cooker 100 may generate a communication response signal corresponding to the communication request signal and may transmit the generated communication response signal to the communicator 240 of the induction heating apparatus 200.

Even when the displacement state of the wireless induction heating cooker 100 is the abnormal displacement state, the communicator 122 may operate based on the current induced in the receiving coil 140, and may transmit the communication response signal to the communicator 240.

The induction heating apparatus 200 can determine the communication state with the wireless induction heating cooker 100 based on whether the communication response signal is received. In some examples, the induction heating apparatus 200 may determine the communication state as a normal state when the communication response signal is received from the wireless induction heating cooker 100, and may determine the communication state as an unavailable state when the communication response signal is not received from the induction heating cooker 100.

The induction heating apparatus 200 may control the wireless induction heating cooker 100 to output the abnormality information based on the determination of the communication state.

For example, when the displacement state of the wireless induction heating cooker 100 is an abnormal displacement state and the communication state is a normal state, the communicator 240 may transmit an abnormal information output request signal to the communicator 122. The controller 121 of the wireless induction heating cooker 100 may receive the abnormality information output request signal through the communicator 122 and may control the display 123 to visually output the abnormality information to the user based on the received signal.

In some examples, based on determining that its communication state is an unavailable state, the induction heating apparatus 200 may reduce the output of the heating coil 210 and may output abnormality information.

For example, when the displacement state of the wireless induction heating cooker 100 is an abnormal displacement state and the communication state is an unavailable state, data communication does not occur and the communicator 240 may not transmit the abnormal information output request signal to the communicator 122. In this case, the controller 230 may reduce the output of the heating coil 210 by reducing the amount of current supplied to the heating coil 210, and may control the display 250 to visually output abnormality information to the user.

According to the present disclosure, the wireless induction heating system may inform the user of the wireless induction heating cooker and the induction heating apparatus which are abnormally set, so that the user may correctly set the wireless induction heating cooker on the induction heating apparatus. Further, it is possible to prevent the rice cooking performance from being deteriorated due to the differential displacement of the wireless induction heating cooker.

An example operation of the wireless induction heating cooker 100 determined based on the displacement state of the wireless induction heating cooker 100 is described below.

The wireless induction heating cooker 100 may determine the displacement state of the wireless induction heating cooker 100 based on the change in the amount of current passing through the receiving coil 140.

Referring to fig. 8, the controller 121 may detect the amount of current of the receiving coil 140. Any suitable current sensor or current detection circuit may be used so that the controller 121 may detect the amount of current of the receiving coil 140. The controller 121 may detect the amount of current passing through the receiving coil 140 during a preset time period and calculate a change in the amount of current between a previous time period and a current time period. The controller 121 may perform such detection and calculation at each time period.

When the displacement state of the wireless induction heating cooker 100 is changed from the normal displacement state to the abnormal displacement state, the degree of matching of the heating coil 210 with the receiving coil 140 is reduced, and the amount of current passing through the receiving coil 140 may also be reduced. Accordingly, the controller 121 may determine the displacement state of the wireless induction heating cooker 100 by comparing the change in the amount of current of the receiving coil 140 with the reference value. For example, when the variation in the amount of current passing through the receiving coil 140 is less than or equal to the reference value, the controller 121 may determine the displacement state of the wireless induction heating cooker 100 as the normal displacement state. When the variation in the amount of current passing through the receiving coil 140 exceeds the reference value, the controller 121 may determine the displacement state of the wireless induction heating cooker 100 as an abnormal displacement state.

Based on the determination that the displacement state of the wireless induction heating cooker 100 is the abnormal displacement state, the controller 121 may control the display 123 to visually output an abnormal signal to the user.

In some examples, based on the determination that the displacement state of the wireless induction heating cooker 100 is the abnormal displacement state, the wireless induction heating cooker 100 may transmit the output reduction request signal to the induction heating device 200. The induction heating device 200 may decrease the output of the heating coil 210 based on the output decrease request signal.

In some examples, based on the displacement state of the wireless induction heating cooker 100 being an abnormal displacement state, the communicator 122 may transmit an output reduction request signal to the communicator 240 of the induction heating apparatus 200.

When the communicator 122 operates as a power source based on the current induced in the receiving coil 140 and the displacement state of the wireless induction heating cooker 100 is an abnormal displacement state and the communication state is an unavailable state, the output reduction request signal may not be transmitted to the communicator 240.

When the displacement state of the wireless induction heating cooker 100 is the abnormal displacement state and the communication state is the normal state, the output reduction request signal may be transmitted to the communicator 240. The controller 230 may receive the output reduction request signal through the communicator 240 and may reduce the amount of current supplied to the heating coil 210 based on the received signal.

In some examples, even when the displacement state of the wireless induction heating cooker 100 is an abnormal displacement state and the communication state thereof is an unavailable state, the communicator 122 of the wireless induction heating cooker 100 may receive power from the internal battery 190 to transmit the output reduction request signal to the induction heating apparatus 200.

Referring to fig. 8, the wireless induction heating cooker 100 may further include a battery 190. The battery 190 may be a non-rechargeable battery that supplies a predetermined voltage or a rechargeable battery that stores the current induced in the receiving coil 140 as backup power.

The battery 190 may supply a predetermined voltage to the communicator 122 regardless of whether current is induced in the receiving coil 140. Accordingly, the wireless induction heating cooker 100 may transmit the output reduction request signal to the induction heating device 200 through the communicator 122 receiving power from the battery 190.

In this case, in all cases where the displacement state of the wireless induction heating cooker 100 is an abnormal displacement state, the output of the heating coil 210 may be reduced.

Referring to fig. 9 and 10, an example operation process of the induction heating apparatus 200 and the wireless induction heating cooker 100 is described below.

Referring to fig. 9, the induction heating apparatus 200 may detect the amount of current passing through the heating coil 210 (S11) and may calculate a change in the amount of current between a previous time period and a current time period, and may compare the calculated change in the amount of current with a reference value (S12).

When the change in the amount of current is equal to or less than the reference value, the induction heating device 200 may maintain the output of the heating coil 210 by maintaining the amount of current supplied to the heating coil 210 (S13).

When the change in the amount of current exceeds the reference value, the induction heating apparatus 200 can determine whether the communication with the wireless induction heating cooker 100 can be performed (S14).

Based on the determination that the communication can be performed (i.e., in the normal state), the induction heating apparatus 200 can transmit an abnormal information output signal to the wireless induction heating cooker 100 (S15).

Determining whether communication can be performed (i.e., in a communication state) through the process of sending a communication request signal and receiving a communication response signal may be performed through the process described herein. Further, the process of operating the wireless induction heating cooker 100 based on the abnormality information output signal may be performed by the process described herein.

Based on the determination that the communication cannot be performed (i.e., in the unavailable state), the induction heating device may decrease the output of the heating coil 210 by decreasing the amount of current supplied to the heating coil 210 (S16).

Subsequently, the induction heating apparatus may visually output abnormality information to the user through the internal display 250 (S17). In some examples, the order of S16 and S17 may be reversed.

Referring to fig. 10, the wireless induction heating cooker 100 may detect the amount of current of the receiving coil 140 (S21), may calculate a change in the amount of current of the receiving coil 140 between a previous time period and a current time period, and may compare the calculated change in the amount of current with a reference value (S22).

The operations of S21 and S22 may be continuously and repeatedly performed based on the change in the amount of current being equal to or less than the reference value. Based on the change in the amount of current exceeding the reference value, an output decrease request signal may be transmitted to the induction heating device 200 (S23).

The process of operating the induction heating apparatus 200 based on the output reduction request signal may be performed similarly or identically to the process described above.

After transmitting the output reduction request signal, the wireless induction heating cooker 100 may visually output abnormality information to the user through the internal display 123 (S24). In some examples, the order of S23 and S24 may be reversed.

According to the present disclosure, the wireless induction heating system may control the amount of heat transfer with respect to the wireless induction heating cooker based on the mutual displacement between the wireless induction heating cooker and the induction heating device, so that a safety problem that would be caused by the differential displacement of the wireless induction heating cooker may be prevented.

Various substitutions, modifications, and changes may be made by those skilled in the art to which the present disclosure pertains within a scope not departing from the technical spirit of the present disclosure. Those skilled in the art will also recognize that the present disclosure is not limited to the implementations and figures described above.

Claims (16)

1. A wireless induction heating cooker configured to operate on an induction heating device having a heating coil, the wireless induction heating cooker comprising:

a body having an upper surface defining an opening;

a cover configured to cover the upper surface of the main body and including a plurality of electronic devices;

a liner received in the body and heated using a first magnetic field generated by the heating coil of the induction heating device;

a first power receiving coil provided on a bottom surface of the main body, wherein an electric current is induced in the first power receiving coil based on the first magnetic field generated by the heating coil;

a side heating coil disposed to surround an outer side surface of the inner container, the side heating coil being connected to the first power receiving coil and configured to heat the inner container based on a current induced in the first power receiving coil;

a power transmitting coil disposed at one side of the main body and configured to receive a current induced in the first power receiving coil and generate a second magnetic field;

a second power receiving coil disposed at one side of the cover and configured to supply a current induced by a second magnetic field generated by the power transmitting coil to one or more of the plurality of electronic devices;

a controller configured to determine a displacement state of the wireless induction heating cooker with respect to the induction heating device based on a change in an amount of current passing through at least one of the first power receiving coil and the second power receiving coil; and

a communicator configured to perform data communication with the induction heating apparatus based on the displacement state of the wireless induction heating cooker.

2. The wireless induction heating cooker according to claim 1, wherein the controller and the communicator are configured to operate based on the current induced in the second power receiving coil.

3. The wireless induction heating cooker of claim 1, wherein the controller is configured to: determining the displacement state of the wireless induction heating cooker as a normal displacement state based on the change in the amount of current being equal to or less than a reference value, and

wherein the controller is configured to: determining the displacement state of the wireless induction heating cooker as an abnormal displacement state based on the change in the amount of current exceeding the reference value.

4. The wireless induction heating cooker of claim 1, wherein the controller is configured to: visually outputting abnormal information based on the determination that the displacement state of the wireless induction heating cooker is an abnormal displacement state.

5. The wireless induction heating cooker according to claim 1,

wherein the communicator is configured to: transmitting an output reduction request signal to the induction heating device based on the determination that the displacement state of the wireless induction heating cooker is an abnormal displacement state, and

wherein the induction heating device is configured to: reducing the output of the heating coil based on the output reduction request signal.

6. The wireless induction heating cooker of claim 5, wherein the communicator is configured to: transmitting the output reduction request signal based on the current induced in the second power receiving coil or the power supplied by an internal battery.

7. The wireless induction heating cooker according to claim 1,

wherein the communicator is configured to: receiving an abnormal information output request signal from the induction heating apparatus based on the determination that the displacement state of the wireless induction heating cooker is an abnormal displacement state, and

wherein the controller is configured to: visually outputting abnormality information based on the abnormality information output request signal.

8. The wireless induction heating cooker of claim 1, wherein the one or more of the plurality of electronic devices include the controller and the communicator and are disposed at the lid.

9. The wireless induction heating cooker according to claim 1, wherein the induction heating device is configured to control the output of the heating coil based on a position of the wireless induction heating cooker with respect to the induction heating device.

10. The wireless induction heating cooker according to claim 1, wherein the induction heating device is configured to output abnormality information based on the position of the wireless induction heating cooker being an abnormal position.

11. The wireless induction heating cooker according to claim 1, wherein the induction heating device is configured to determine the displacement state of the wireless induction heating cooker based on a change in the amount of current passing through the heating coil.

12. The wireless induction heating cooker of claim 11, wherein the induction heating device determines the displacement state of the wireless induction heating cooker as a normal displacement state based on a change in the amount of current passing through the heating coil being equal to or less than a reference value,

wherein the induction heating device determines the displacement state of the wireless induction heating cooker as an abnormal displacement state based on a change in the amount of current passing through the heating coil exceeding the reference value.

13. The wireless induction heating cooker of claim 11, wherein the induction heating device is configured to: maintaining an output of the heating coil based on the displacement state of the wireless induction heating cooker being a normal displacement state, and

wherein the induction heating device is configured to: reducing an output of the heating coil based on the displacement state of the wireless induction heating cooker being an abnormal displacement state.

14. The wireless induction heating cooker of claim 1, wherein the wireless induction heating cooker is configured to: performing data communication with the induction heating device based on a current induced by a magnetic field generated by the heating coil.

15. The wireless induction heating cooker of claim 14, wherein the induction heating device is configured to: determining a communication state with the wireless induction heating cooker based on the wireless induction heating cooker being in an abnormal displacement state with respect to the induction heating device, and

wherein the induction heating device is configured to: generating abnormality information and controlling the wireless induction heating cooker to output the abnormality information based on the communication state with the wireless induction heating cooker.

16. The wireless induction heating cooker of claim 15, wherein the wireless induction heating cooker is configured to: outputting the abnormality information based on the communication state between the induction heating apparatus and the wireless induction heating cooker being a normal state, and

wherein the induction heating device is configured to: reducing an output of the heating coil and outputting the abnormality information based on the communication state between the induction heating apparatus and the wireless induction heating cooker being an unavailable state.

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