Patent Publication Number: US-2021195698-A1

Title: Cooking apparatus

Description:
TECHNICAL FIELD 
     The present disclosure relates to a cooking apparatus, and, particularly, to a cooking apparatus that can change a position of a heating module for heating a cooking vessel. 
     BACKGROUND 
     Cooking apparatuses may heat food using electricity or other energy sources (e.g., gas) at homes or in indoor spaces. 
     The cooking apparatuses may be classified as a cooking apparatus such as a gas range, a gas oven, a gas oven range, and the like that use gas as a heat source, a cooking apparatus such as an induction range that uses electricity as a heat source, an electric range using a radiant heater, a microwave oven, and the like. In some case, a cooking apparatus may include an induction range using electricity and a gas oven using gas that are combined. 
     An induction range may use induction heating (IH). Induction heating involves a technology of enabling induced current to flow without directly contacting an object subject to heating. For example, induction heating may include a technology or method for generating heat in a cooking vessel disposed in a magnetic field space having a magnetic field formed around a coil when electric current is supplied to the coil. In the induction heating, the cooking vessel may be made of a material to which a magnet is attached (e.g., a metallic material to which a magnet is attached). 
     In some cases, a cooking apparatus may include a coil for heating a cooking vessel at a predetermined position of the cooking apparatus. 
     SUMMARY 
     The present disclosure describes a cooking apparatus that may heat a cooking vessel even when the cooking vessel is disposed at any position on the cooking apparatus. 
     The present disclosure also describes a cooking apparatus that may accurately recognize a position of a cooking vessel disposed on the cooking apparatus. 
     The present disclosure further describes a cooking apparatus that may move a heating module disposed at a lower side of the cooking vessel based on the recognized position of the cooking vessel. 
     The present disclosure describes a cooking apparatus that may supply electric current stably to the heating module without interruption of supply of current or disconnection of current even when the heating module provided at the cooking apparatus is moved. 
     In some implementations, the cooking apparatus may recognize a position of a cooking vessel disposed on an upper plate of the cooking apparatus and may automatically move a heating module to a position corresponding to a lower side of the cooking vessel. 
     According to one aspect of the subject matter described in this application, a cooking apparatus includes an upper plate configured to support a cooking vessel, a heating module that is disposed in a lower space defined vertically below the upper plate and that is configured to move in the lower space relative to the upper plate, the heating module including a coil, a substrate disposed between the upper plate and the heating module, the substrate including a plurality of coil patterns, an inverter configured to supply resonance current to each of the plurality of coil patterns, and a controller. The controller is configured to control the heating module, the plurality of coil patterns, and the inverter, and determine a position of the cooking vessel on the upper plate based on a number of pulses of the resonance current supplied to each of the plurality of coil patterns or a frequency of the resonance current. 
     Implementations according to this aspect may include one or more of the following features. For example, the substrate may cover an upper end of the lower space. In some examples, the plurality of coil patterns are disposed on the substrate, spaced apart from one another by predetermined intervals, and arranged along a plurality of rows and a plurality of columns. In some examples, the controller may be configured to control the inverter to repeatedly supply a pulse to each of the plurality of coil patterns based on a predetermined cycle until the position of the cooking vessel is determined. 
     In some implementations, the cooking apparatus may further include a plurality of sensors, each of the plurality of sensors being connected to one of the plurality of coil patterns and configured to detect the number of pulses and the frequency of the resonance current supplied to the one of the plurality of coil patterns. In some examples, the controller may be configured to electrically connect to each of the plurality of sensors and receive pulse information including the number of the pulses and the frequency of the resonance current supplied to each of the plurality of sensors, and based on the pulse information, determine a target coil pattern corresponding to the position of the cooking vessel among the plurality of coil patterns. 
     In some implementations, the controller may be configured to receive target position information corresponding to a position of the target coil pattern from a non-transitory memory device, the non-transitory memory device being configured to store position information corresponding to each of the plurality of coil patterns, and determine the position of the cooking vessel based on the target position information. 
     In some implementations, the controller may be configured to, based on the cooking vessel overlapping with a first area on the upper plate corresponding to a first target coil pattern among the plurality of coil patterns and a second area on the upper plate corresponding to a second target coil pattern among the plurality of coil patterns, determine the position of the cooking vessel based on a difference in the number of the pulses or the frequency of the resonance current supplied to the first target coil pattern and the second target coil pattern. The first area is greater than the second area. 
     In some implementations, the controller is configured to determine that no cooking vessel is disposed on the upper plate based on (i) the number of pulses detected by each of the plurality of sensors being greater than a first reference number and (ii) the frequency of the resonance current corresponding to a first reference frequency. In some examples, the controller may be configured to, based on a number of pulses supplied to a coil pattern among the plurality of coil patterns being between the first reference number and a second reference number that is less than the first reference number, determine the coil pattern as the second target coil pattern, and based on the number of pulses supplied to the coil pattern being less than the second reference number, determine the coil pattern as the first target coil pattern. 
     In some implementations, the controller may be configured to, based on a frequency of resonance current supplied to a coil pattern among the plurality of coil patterns being between the first reference frequency and a second reference frequency that is less than the first reference frequency, determine the coil pattern as the second target coil pattern, and based on the frequency of the resonance current supplied to the coil pattern being less than the second reference frequency, determine the coil pattern as the first target coil pattern. 
     In some implementations, the controller may be configured to move the heating module to a lower side of the cooking vessel corresponding to the determined position of the cooking vessel. In some examples, the controller may be configured to, based on identifying both of the first target coil pattern and the second target coil pattern, move the heating module to a position corresponding to the first target coil pattern. In some examples, the controller may be configured to, based on identifying a plurality of target coil patterns that completely overlap with the cooking vessel among the plurality of coil patterns, move the heating module to a position corresponding to a center of the plurality of target coil patterns. 
     In some implementations, the controller may be configured to, based on identifying a plurality of target coil patterns that at least partially overlap with the cooking vessel among the plurality of coil patterns, move the heating module to a position corresponding to a center of the plurality of target coil patterns. 
     In some implementations, the controller may be configured to wirelessly communicate with the inverter and the heating module. 
     In some implementations, the cooking apparatus may further include a rail connected to the heating module and configured to guide movement of the heating module in the lower space, where the controller may be configured to, based on determining the position of the cooking vessel, move the heating module along the rail. 
     In some implementations, the cooking apparatus may further include a driver configured to provide power to move the heating module along the rail, the driver comprising at least one of a motor, a wheel, or a gear. 
     In some implementations, the cooking apparatus may include a first rail that is connected to the heating module, that extends in a first direction, and that is configured to guide movement of the heating module along the first direction, and a second rail that is connected to the first rail, that extends a second direction crossing the first direction, and that is configured to guide movement of the heating module along the second direction. The controller may be configured to, based on determining the position of the cooking vessel, move the heating module along the first rail and move both the heating module and the first rail along the second rail. In some examples, the second rail may be connected to a power supply and configured to transmit electric power from the power supply to the first rail. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a conceptual view illustrating an example of a cooking apparatus. 
         FIG. 2  is a view illustrating an example of a heating module in the cooking apparatus in  FIG. 1 . 
         FIG. 3  is a view illustrating an example of an electric connection between a rail and a coil of a heating module. 
         FIG. 4  is a view illustrating example components of the cooking apparatus and an example connection between the components. 
         FIGS. 5A and 5B  are views illustrating an example of a substrate configured to detect a position of a cooking vessel. 
         FIG. 6  is a view illustrating an example connection between example components configured to determine a position of a cooking vessel. 
     
    
    
     DETAILED DESCRIPTION 
     One or more implementations of a cooking apparatus will be described with reference to the accompanying drawings. The drawings illustrate examples of the present disclosure and are provided to describe the disclosure in detail. Thus, the technical scope of the present disclosure should not be construed as being limited to the implementations and drawings set forth herein. 
     In the drawings, like reference numerals denote like components, and description of like components is not repeated. 
       FIG. 1  is a conceptual view illustrating an example of a cooking apparatus, and  FIG. 2  is a view illustrating a heating module provided at the cooking apparatus in  FIG. 1 . 
     Specifically,  FIG. 1  is a schematic plane view illustrating a state in which an upper plate supporting a cooking vessel is omitted, and  FIG. 2  is a schematic lateral cross-sectional view illustrating a heating module provided in a space (e.g., a lower space) under the upper plate. 
     For convenience of description, an X-axis in  FIG. 1  may indicate a lengthwise direction of a cooking apparatus, and a Y-axis in  FIG. 1  may indicate a widthwise direction of the cooking apparatus. 
     Referring to  FIGS. 1 and 2 , a cooking apparatus  10  may be implemented as an induction range configured to heat a cooking vessel by a magnetic field that is generated by electric current supplied to a coil. 
     The cooking apparatus  10  may include a heating module  200  disposed under an upper plate  100 , and one or more rails  310 ,  320  disposed under the heating module  200 . 
     The upper plate  100  may be made of at least one of glass, marble, ceramics, and wood. A cooking vessel  150  may be disposed on the upper plate  100 . That is, the cooking vessel  150  may be supported by the upper plate  100 . 
     In some implementations, the cooking vessel  150  may be made of a material that may be heated by a magnetic field generated in the heating module  200 . For example, the cooking vessel  150  may be made of a material to which a magnet is attached (e.g., metal to which a magnet is attached). In some examples, the cooking vessel  150  itself may be heated by the heating module  200 , and contents of the cooking vessel  150  may be heated. 
     The cooking apparatus  10  may be provided with an induction coil where induced current may be generated by a magnetic field of the heating module  200 . In some examples, any material may be used as a material of the cooking vessel  150 , and induced current generated in the induction coil may be used as energy for heating the inside of the cooking vessel  150 . 
     The heating module  200  may be disposed in a lower space (S) provided under the upper plate  100 . The heating module  200  may be movably provided in the space (S). For example, the heating module  200  may be movably provided in the space (S) in the lengthwise direction and the widthwise direction of the cooking apparatus. 
     The heating module  200  may include a coil  210 . The coil  210  may be made of a material including copper. For example, the coil  210  may include a copper wire that is wound multiple times in a circular shape. In some examples, the coil  210  may have a shape in which a copper wire is wound a plurality of times in different radial directions. In some cases, the coil  210  may have a shape in which a copper wire is wound a plurality of times such that a radius of the copper wire is gradually increased. 
     When electric current is supplied to the coil  210 , a magnetic field may be generated. In some examples, the electric current may be alternating current. A cooking vessel  150  disposed above the coil  210  may be heated by the magnetic field generated in the coil  210 . 
     The heating module  200  may include an inverter  270  disposed under the coil  210 . The inverter  270  may be configured to convert electric current supplied to the heating module  200  into high-frequency current. In some examples, electric current may be supplied to the inverter  270  from an external power supply, and the inverter  270  may convert electric current supplied by the external power supply into high-frequency current and may supply the high-frequency current to the coil  210 . 
     The inverter  270  is provided at the heating module  200 . When the heating module  200  moves, the invert  270  may also move. The inverter  270  may be controlled by a controller (C). For example, the inverter  270  may be controlled by the controller (C) through wireless communication. In some cases, the controller (C) may include an electric circuit, a transmitter, a receiver, or processor. 
     In some implementations, as the inverter  270  moves together with the coil  210  when the heating module  200  moves, an electric short circuit or an electric disconnection between the inverter  270  and the coil  210  may not occur although the heating module  200  moves. 
     The heating module  200  may be further provided with a magnetic field-blocking member  250  disposed between the coil  210  and the inverter  270 . That is, the coil  210 , the magnetic field-blocking member  250  and the inverter  270  may be consecutively disposed in an up-down direction. The magnetic field-blocking member  250  may be configured to block a magnetic field generated in the coil  210  from proceeding to the inverter  270 . 
     For example, the magnetic field-blocking member  250  may be formed into an aluminum plate. The magnetic field-blocking member  250  may help to prevent the inverter  270  from operating incorrectly and from being damaged. 
     The heating module  200  may include a ferrite core  230  disposed between the coil  210  and the inverter  270 . The ferrite core  230  may be disposed between the coil  210  and the magnetic field-blocking member  250 . 
     By the ferrite core  230 , a path of a magnetic field generated in the coil  210  may concentrate on a cooking vessel  150  disposed above the coil  210 . That is, the ferrite core  230  may concentrate a path of a magnetic field generated in the coil  210  on an upper side of the coil  210 , and may magnify intensity of a magnetic field affecting a cooking vessel. 
     Referring to  FIG. 1 , the rails  310 ,  320  may be configured to guide movements of the heating module  200 . The rails  310 ,  320  may be disposed under the heating module  200 . For example, the rails  310 ,  320  may be disposed under the heating module  200  in a space (S) defined vertically below the upper plate  100 . 
     In some implementations, electric current from an external power supply may be supplied to the rails  310 ,  320 . In some examples, the rails  310 ,  320  may be made of electrically conductive metal. Additionally, the heating module  200  may be supplied with electric current through the rails  310 ,  320 . Accordingly, although the heating module  200  moves in the space (S), a short circuit may not occur between the rail  310 ,  320  and the heating module  200 . 
     The heating module  200  may be disposed on the rails  310 ,  320 , and the rails  310 ,  320  may include a first rail  310  electrically connected to the heating module  200 . The first rail  310  may be configured to have a predetermined length such that the first rail extends in the widthwise direction (i.e., the Y-axis direction) of the cooking apparatus  10 . 
     The heating module  200  may move on the first rail  310  along extension direction of the first rail  310 . When the heating module  200  moves on the first rail  310 , an electric connection between the first rail  310  and the heating module  200  may be maintained. 
     Accordingly, regardless of a position of the heating module  200  on the first rail  310 , the heating module  200  may be supplied with electric current from an external power supply through the first rail  310 . 
     In some examples, a pair of the first rails  310  may be provided to supply alternating current to the heating module  200 . That is, a pair of first rails  310  may extend in the widthwise direction of the cooking apparatus  10  in parallel with each other. 
     In some examples, the heating module  200  may be provided with a contact terminal  280  that keeps contacting the first rail  310 . A pair of contact terminals  280  may be provided to correspond to the pair of first rails  310 . Through the pair of first rails  310  and the pair of contact terminals  280 , alternating current may be supplied to the heating module  200 . 
     In some implementations, the pair of first rails  310  and the pair of contact terminals  280  may contact each other at a pair of first contact areas  315 . Positions of the pair of first contact areas  315  may vary depending on movements of the heating module  200  on the first rail  310 . 
     One end of the contact terminal  280  may be connected to the inverter  270 , and the other end (i.e., a free end) of the contact terminal  280  may contact the first rail  310 . Accordingly, electric current from an external power supply may consecutively pass the first rail  310 , the contact terminal  280  and the inverter  270  and then may be supplied to the coil  210 . 
     For example,  FIG. 3  is a cross-sectional view illustrating an electric connection between a rail and a coil provided at a heating module. 
     Referring to  FIGS. 1 and 3 , a pair of first rails  310  may be spaced apart from each other and may be disposed in parallel with each other. The first rail  310  may have a shape in which a surface area of its upper end is smaller than a surface area of its lower end, and the contact terminal  280  may contact the upper end. Accordingly, a short circuit may not occur between the first rail  310  and the contact terminal  280 . 
     In some examples, the first rail  310  and the inverter  270  may be electrically connected by the contact terminal  280 . 
     For instance, the free end  289  of the contact terminal  280  may contact the upper end of the first rail  310 . In some examples, the contact terminal  280  may be provided with a bent portion  281  such that the free end  289  elastically contacts the upper end of the first rail  310 . 
     In some implementations, the bent portion  281  may be disposed at the first rail  310 , and the free end of the first rail  310  may elastically contact the upper end of the first rail  310 . The bent portion  281  may be disposed closer to the other end of the contact terminal  280  than to one end of the contact terminal  280 . In some examples, the bent portion  281  may be disposed near the free end  289  of the contact terminal  280 . 
     Accordingly, the free end of the contact terminal  280  is pressed downwards on the first rail  310  against the first rail  310 , and a contact force between the first rail  310  and the contact terminal  280  may be increased. 
     Referring back to  FIGS. 1 and 2 , the rails  310 ,  320  may further include a second rail  320  that is orthogonal to the first rail  310 . The second rail  320  may be electrically connected to the first rail  310 . 
     The first rail  310  may move in a direction in which the second rail  320  extends while maintaining the electric connection with the second rail  320 . That is, the second rail  320  may be configured to extend in a predetermined length in the lengthwise direction (i.e., the X-axis direction) of the cooking apparatus  10 . 
     Additionally, the first rail  310  may be configured to move on the second rail  320  along extension direction of the second rail  320 . In some examples, while the first rail  310  is moved on the second rail  320 , the electric connection between the first rail  310  and the second rail  320  may be maintained. 
     In some implementations, a pair of second rails  320  may be provided to correspond to the pair of first rails  310 . The pair of first rails  310  and the pair of second rails  320  may contact each other at a pair of second contact areas  325 . Positions of the pair of second contact areas  325  may vary depending on movements of the first rail  310  on the second rail  320 . 
     When electric current is supplied to any one of the first rail  310  and the second rail  320  from an external power supply, the electric current may also be supplied to the other rail. That is, as the first rail  310  and the second rail  320  are electrically connected, a degree of freedom of an electric connection through the external power supply may be increased. 
     In some examples, the external power supply may be electrically connected to the second rail  320 , and the first rail  310  may receive electric current through the second rail  320 , as the first rail  310  may move on the second rail  320  along extension direction of the second rail  320 . 
     That is, the first rail  310  may move and the second rail  320  may be fixed to a predetermined position. For example, the second rail  320  may be disposed at one side in the widthwise direction of the space (S). 
     When an external power supply is connected to the movable first rail  310  directly and electrically, an electric short circuit or an electric disconnection may occur between the external power supply and the first rail  310 . In some examples, an external power supply is connected to the fixed second rail  320 , and the first rail  310  is supplied with electric current through the second rail  320 . 
     That is, as the external power supply may be connected to the second rail  320  directly and electrically, the electric current from the external power supply may pass the second rail  320 , the first rail  310 , the contact terminal  280  and the inverter  270  consecutively and then may be supplied to the coil  210 . 
     In some implementations, the cooking apparatus  10  may further include one or more drivers or driving devices. For example, the cooking apparatus  10  may further include one or more moving tools  410 ,  420  for moving the heating module  200 . In some examples, the moving tools  410  and  420  may include at least one of a wheel, a motor, a gear and a hydraulic cylinder, or any combinations thereof. 
     The moving tools  410 ,  420  may include a first moving tool  410  for moving the heating module  200  on the first rail  310 , and a second moving tool  420  for moving the second rail  320  on the second rail  320 . 
     The first moving tool  410  may be configured to supply power for moving the heating module  200  on the first rail  310 . Additionally, the second moving tool  420  may be configured to supply power for moving the second rail  320  on the second rail  320 . 
     In some implementations, the first moving tool  410  may be provided at the heating module  200  or may be spaced apart from the heating module  200 . In some examples, the first moving tool  410  is provided at the heating module  200  to avoid interference when the heating module  200  moves. 
     In some examples, the second moving tool  420  is also disposed at a position where interference may be minimized when the heating module  200  moves. The second moving tool  420  may be disposed at one side of the second rail  320 . 
     For example, the second rail  320  and the second moving tool  420  may all be disposed at one side of the cooking apparatus  10  in the widthwise direction thereof. Additionally, the second moving tool  420  may be disposed to lean further towards at one side of the cooking apparatus  10  in the widthwise direction thereof than the second rail  320 . Accordingly, interference between the second moving tool  420  and the heating module  200  may be avoided. 
     The heating module  200  may be disposed on a first support bracket  290 . The first support bracket  290  may have a length greater than a width and may be disposed on a second support bracket  390  at which the first rail  310  is disposed. The second support bracket  390  may extend along extension direction of the first rail  310 . The second support bracket  390  may have a width greater than a length. 
     The first support bracket  290  may make relative movements with respect to the second support bracket  390  by the first moving tool  410 . That is, the first support bracket  290  may be moved along extension direction of the second support bracket  390  by the first moving tool  410 . For example, the first support bracket  290  may be slid on the second support bracket  390  by the first moving tool  410 . 
     The second support bracket  390  may make relative movements with respect to the second rail  320  by the second moving tool  420 . That is, the second support bracket  390  may be moved along extension direction of the second rail  320  by the second moving tool  420 . For example, the second rail  320  may be disposed at a bottom surface of the space (S) provided under the upper plate  100 , and the second support bracket  390  may be slid on the second rail  320  by the second moving tool  420 . 
     The first rail  310  and the second moving tool  420  may be disposed at the second support bracket  390 . Additionally, the second rail  320  may be disposed to cross the second support bracket  390  in the lengthwise direction (the X-axis direction) under the second support bracket  390 . 
     The moving tools  410 ,  420  may be supplied with electric current through at least one of the first rail  310  and the second rail  320 . For example, the first moving tool  410  and the second moving tool  420  may be electrically connected with the first rail  310  or the second rail  320  and may be supplied with electric current. Accordingly, a wire for supplying electric current to the first rail  310  and the second rail  320  may be simply implemented. 
     In some implementations, the first moving tool  410  and the second moving tool  420  may all be supplied with electric current through the first rail  310 . 
     Specifically, a first connection wire  411  may be provided between the first moving tool  410  and the contact terminal  280 , and the first moving tool  410  may be supplied with electric current through the first connection wire  411 . 
     A second connection wire  421  may be provided between the second moving tool  420  and the first rail  310 , and the second moving tool  420  may be supplied with electric current through the second connection wire  421 . 
     For example, the second connection wire  421  may be disposed to connect one end of the first rail  310  in a lengthwise direction thereof and the second moving tool  420 . One end of the first rail  310  in the lengthwise direction thereof may be one of both ends of the first rail  310  in the lengthwise direction thereof, which is relatively close to the second moving tool  420 . 
     Through the arrangement of the first connection wire  411  and the second connection wire  421 , interference with the heating module  200  may be avoided, and, using a minimum length of the connection wire, electric current may be supplied to the first moving tool  410  and the second moving tool  420 . 
     The cooking apparatus  10  may further include a substrate  500  disposed between the upper plate  100  and the heating module  200 . The substrate  500  may be formed into a printed circuit board. A plurality of coil patterns may be printed on the substrate  500 . For example, the plurality of coil patterns may be printed with a copper material. Through the substrate  500 , a position of a cooking vessel disposed on the cooking apparatus  10  may be determined. Detailed description in relation to this is provided hereunder with reference to another drawing. 
     An example of an electric connection between example components of the cooking apparatus  10  is described below with reference to another drawing. 
       FIG. 4  is a view illustrating an example of a connection between example components. 
     Referring to  FIG. 4 , the second rail  320  may be electrically connected to an external power supply  50 . That is, the second rail  320  may be connected to the external power supply  50  directly and electrically. 
     The second rail  320  may be electrically connected to the first rail  310 . Accordingly, electric current from the external power supply  50  may be supplied to the first rail  310  through the second rail  320 . 
     The first rail  310  may be electrically connected respectively to the heating module  200 , the first moving tool  410  and the second moving tool  420 . 
     In some examples, the first rail  310  and the second moving tool  420  may be connected directly and electrically to each other. The first rail  310  and the heating module  200  may also be connected directly and electrically to each other. 
     Additionally, the first rail  310  and the first moving tool  410  may be electrically connected through the contact terminal  280  provided at the heating module  200 . 
     The heating module  200 , the first moving tool  410  and the second moving tool  420  may be controlled by the controller (C). For example, the heating module  200 , the first moving tool  410  and the second moving tool  420  may communicate with the controller (C) using a wireless communication method. 
     The heating module  200 , the first moving tool  410  and the second moving tool  420  may be provided respectively with a communication module to communicate with the controller (C), and the controller (C) may also be provided with a communication module. 
     The heating module  200 , the first moving tool  410  and the second moving tool  420  may be controlled by the controller (C) through wireless communication. Accordingly, interference between the heating module  200  and a communication wire caused by movements of the heating module  200  may be avoided through control by the controller using wireless communication better than through control by the controller using the communication wire. 
     Electric current from the external power supply  50 , as described above, may pass the second rail  320  and the first rail  310  consecutively and may be respectively supplied to the second moving tool  420  and the heating module  200 . Further, electric current supplied to the heating module  200  may be supplied to the first moving tool  410  through the contact terminal  280  provided at the heating module  200 . 
     The cooking apparatus  10  may include a plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ) provided at the upper plate  100 . The plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ) may include four vibration sensors (i.e., a first vibration sensor  510 , a second vibration sensor  520 , a third vibration sensor  530 , and a fourth vibration sensor  540 ). 
     The controller (C) may be electrically connected to the plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ) and may control the plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ). 
     That is, the controller (C) may receive a signal from the plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ). The plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ) may be configured to sense vibration and to output a signal based on magnitude of vibration. 
     In some examples, a signal from the plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ) may denote an output voltage of the plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ). For example, each of the plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ) may be configured such that intensity of a signal (magnitude of an output voltage) is increased as magnitude of vibration is increased. 
     The controller (C) may determine a position of a cooking vessel disposed on the upper plate  100  based on a signal from the plurality of vibration sensors ( 510 ,  520 ,  530  and  540 ). 
     That is, the heating module  200  may change a position based on a position of a cooking vessel. In other words, the heating module  200  has to change its position to be disposed under a cooking vessel. Accordingly, a position of a cooking vessel needs to be determined before the heating module  200  is moved. 
     An example configuration for determining a position of a cooking vessel disposed on the upper plate is described with reference to another drawing. 
       FIGS. 5A and 5B  are views illustrating an example substrate configured to determine a position of a cooking vessel. Specifically,  FIG. 5A  is a plane view showing an example substrate on which a plurality of coil patterns are printed, and  FIG. 5B  is a conceptual view illustrating an example of an arrangement relation of an upper plate, a substrate, and a heating module. 
     Referring to  FIGS. 5A and 5B , the substrate  500  may be disposed between the upper plate  100  and the heating module  200 . The substrate  500  may be disposed above the heating module  200  in the space (S) provided under the upper plate  100 . 
     A plurality of coil patterns  510  may be printed on the substrate  500 . The plurality of coil patterns  510  may all be formed into the same shape and size. Using the plurality of coil patterns  510  printed on the substrate  500 , a position of a cooking vessel  150  may be determined. 
     That is, when electric current is supplied to the heating module  200 , a cooking vessel  150  disposed above the heating module  200  may be heated, or induced current may be generated in an induction coil inside the cooking vessel  150 . When a cooking vessel  150  is made of metal, the cooking vessel  150  itself may be heated by the heating module  200 . When electric current is supplied to the heating module  200  in case that an induction coil is disposed in a cooking vessel  150 , induced current may be generated in the induction coil. In case that an induction coil is disposed in a cooking vessel  150 , an exterior of the cooking vessel  150  may be made of a resin material. In some examples, induced current generated in the induction coil may be used as energy for operation the cooking vessel  150 . 
     When electric current is supplied to the substrate  500 , a position of a cooking vessel  150  may be determined. The electric current supplied to the substrate  500 , which are used to determine a position of a cooking vessel  150 , may be smaller than electric current supplied to the heating module  200 . Additionally, supplying electric current to the substrate  500  may denote supplying electric current to the plurality of coil patterns  510  printed on the substrate  500 . 
     For example, when a cooking vessel  150  is made of metal, the cooking vessel  150  may be a load of a magnetic field generated in the heating module  200 . Accordingly, the number of pulses output during a predetermined period from a specific coil pattern disposed at a position where the cooking vessel  150  is disposed may be fewer than the number of pulses output from another coil pattern. For example, the predetermined period may be 200 microseconds. 
     In some examples, where an induction coil is disposed in a cooking vessel  150 , a frequency of a pulse output from a specific coil pattern disposed at a position corresponding to the cooking vessel  150  may be lower than a frequency of a pulse output from another coil pattern. 
     In some implementations, a position of a cooking vessel  150  disposed above the substrate  500  may be determined. Detailed description in relation to this is provided hereunder with further reference to another drawing. 
     The substrate  500  may be sized to cover the space (S) provided under the upper plate  100 . That is, an upper end of the space (S) may be completely covered with the substrate  500 . This is to determine any position where a cooking vessel  150  is disposed in a range in which the heating module  200  may move. 
     When the plurality of coil patterns  510  are disposed on a lower surface of the substrate, the movable heating module  200  may interfere with the plurality of coil patterns  510 . Accordingly, the plurality of coil patterns  510  may be disposed on an upper surface of the substrate  500 . 
     Further, the plurality of coil patterns  510  may be disposed to form a plurality of rows and a plurality of columns at predetermined intervals on the substrate  500 . This is to determine a position of a cooking vessel  150  accurately through a comparison of the number and frequency of pulses output from each coil pattern. 
     When electric current is supplied to the substrate  500  in a state in which a cooking vessel  150  is disposed on the upper plate  100 , a position of the cooking vessel  150  may be determined, and, based on the determined position of the cooking vessel  150 , the heating module  200  may move to a lower side of the cooking vessel  150 . 
     An example of a method of determining a position of a cooking vessel  150  through the substrate  500  is described below with reference to another drawing. 
       FIG. 6  is a view illustrating an example of a connection between example components for determining a position of a cooking vessel. 
     Referring to  FIG. 6 , the cooking apparatus  10  may further include an inverter  530  that supplies resonance current to the substrate  500 . That is, the inverter  530  may be configured to supply resonance current to each of the plurality of coil patterns  510  provided on the substrate  500 . 
     The cooking apparatus  10  may further include a power supply  70  that supplies power to the inverter  530 . That is, the inverter  530  may receive a predetermined voltage through the power supply  70 . 
     The inverter  530  may supply a voltage lower than a voltage supplied to the heating module  200  to each of the plurality of coil patterns  510 . For example, a voltage of 40 to 60 V may be supplied to each of the plurality of coil patterns  510  by the inverter  530 . In some examples, a voltage of 50 V may be supplied to each of the plurality of coil patterns  510 . 
     The controller (C) may determine a position of a cooking vessel  150  on the upper plate  100  based on the number of pulses of resonance current supplied to each of the plurality of coil patterns  510  or frequency of resonance current supplied to each of the plurality of coil patterns  510 . 
     According to the present disclosure, using a substrate  500  that is easily manufactured and is cost-effective, a position of a cooking vessel  150  may be determined accurately and readily. 
     The inverter  530  may generate a one-shot pulse in the plurality of coil patterns  510  in a predetermined cycle. That is, the controller (C) may control the inverter  530  such that the inverter  530  generates a one-shot pulse in the plurality of coil patterns  510  in a predetermined cycle until a position of a cooking vessel  150  is determined. 
     The inverter  530  may generate a one-shot pulse in the plurality of coil patterns  510  at the same time. Accordingly, the number or frequency of pulses output from the plurality of coil patterns  510  may be compared under the same conditions. 
     The cooking apparatus  10  may further include a recognizer  550  configured to recognize at least one of the number and frequency of pulses output from the plurality of coil patterns  510 . A plurality of recognizers  550  may be provided. Additionally, the same number of recognizers may be provided as the number of the plurality of coil patterns  510 . That is, each of the plurality of recognizers  550  may correspond to each of the plurality of coil patterns  510  (e.g., on a one-to-one basis). For example, the recognizers  550  may be or include sensors or electric circuits. In some cases, the plurality of coil patterns  510  or the plurality of recognizers  550  may be vibration sensors. 
     Accordingly, the number and frequency of pulses output from each coil pattern  510  during a predetermined period may be sensed more accurately and immediately. 
     Specifically, the controller (C) may be electrically connect to the plurality of recognizers  550  and may receive information on the number and frequency of pulses generated in each coil pattern  510 . Based on the information, the controller (C) may determine a target coil pattern corresponding to a position where a cooking vessel  150  is disposed among the plurality of coil patterns  510 . The target coil pattern may be one or more specific coil patterns that indicate a position where a cooking vessel  150  is disposed among the plurality of coil patterns  510 . 
     For example, in case that a cooking vessel  150  is made of metal, the number of pulses output from a target coil pattern during a predetermined period among the plurality of coil patterns  510  may differ from the number of pulses output from the other coil patterns. 
     In case a cooking vessel  150  is provided with an induction coil, a frequency output from a target coil pattern among the plurality of coil patterns  510  may differ from a frequency output from the other coil patterns. 
     The controller (C), as described above, may determine a position of a cooking vessel  150  based on the number and frequency of pulses output from each of the plurality of coil patterns  510  during a predetermined period. 
     Further, through a comparison of the number and frequency of pulses during a predetermined period, the controller (C) may determine the type of a cooking vessel  150 . That is, in case that a position of a cooking vessel  150  is identified through a comparison of the number of pulses during a predetermined period, the cooking vessel  150  is made of metal. In case that a position of a cooking vessel  150  is identified through a comparison of frequencies, the cooking vessel  150  is provided with an induction coil. 
     Certainly, information on a position of each of the plurality of coil patterns  510  may be determined through an experiment and may be pre-stored in a memory (M) electrically connected to the controller (C). For example, position information corresponding to each coil pattern  510  may be stored in the memory (M). 
     That is, the controller (C) may receive information on a position of the target coil pattern through the memory (M) in which position information on each of the plurality of coil patterns  510  is stored. Additionally, the controller (C) may determine a position of a cooking vessel  150  based on the information on a position of the target coil pattern. Accordingly, based on the position information on the plurality of coil patterns  510 , a position of a cooking vessel  150  may be readily determined. 
     The target coil pattern may include a first target coil pattern completely overlapping a lower side of a cooking vessel  150 , and a second target coil partially overlapping the lower side of the cooking vessel  150 . 
     That is, among the plurality of coil patterns  510 , a coil pattern disposed to completely overlap a lower surface or an induction coil of a cooking vessel  150  under the cooking vessel  150  may be the first target coil pattern, while, among the plurality of coil patterns  510 , a coil pattern disposed to partially overlap a lower surface or an induction coil of a cooking vessel  150  under the cooking vessel  150  may be the second target coil pattern. 
     Additionally, the number and frequency of pulses in the first target coil pattern during a predetermined period may be different from the number and frequency of pulses in the second target coil pattern during a predetermined period. That is, the number of pulses output from the first target coil pattern and the second target coil pattern during a predetermined period may differ. Further, frequencies output from the first target coil pattern and the second target coil pattern may differ. 
     As described above, as the target coil pattern may be divided into the first target coil pattern and the second target coil pattern, a position of a cooking vessel  150  may be determined more accurately. 
     In some cases, when a cooking vessel  150  is not disposed on the upper plate  100 , the number of pulses of resonance current recognized by all the plurality of recognizers  550  may be more than a first predetermined reference number, and a frequency of the resonance current may be a first predetermined reference frequency. 
     In some examples, where a cooking vessel  150  is made of metal, the number of pulses of resonance current recognized by all the plurality of recognizers  550  may be more than a first predetermined reference number. In some cases, where a cooking vessel  150  includes an induction coil, a frequency of resonance current recognized by all the plurality of recognizers  550  may be a first predetermined reference frequency. 
     In some implementations, when the number of pulses of resonance current recognized by all the plurality of recognizers  550  is more than a first predetermined reference number and a frequency of the resonance current is a first predetermined reference frequency, the controller (C) may determine that a cooking vessel  150  is not disposed on the upper plate  100 . 
     In some examples, where a cooking vessel  150  made of metal is disposed on the upper plate  100 , the number of pulses of resonance current output from one or more specific coil patterns that at least partially overlap a position of the cooking vessel  150  among the plurality of coil patterns  510  may be fewer than the first reference number. 
     In some implementations, the controller (C) may determine that a coil pattern, where the number of pulses of resonance current is fewer than the first reference number and is more than a second predetermined reference number fewer than the first reference number, is a second target coil pattern. Further, the controller (C) may determine that a coil pattern, where the number of pulses of resonance current is fewer than the second reference number, is the first target coil pattern. For example, the first reference number may be four to five, and the second reference number may be one to two. 
     In some examples, where a cooking vessel  150  including an induction coil is disposed on the upper plate  100 , a frequency of resonance current output from one or more specific coil patterns that at least partially overlap a position of the cooking vessel  150  among the plurality of coil patterns  510  may be lower than a first reference frequency. 
     In some implementations, the controller (C) may determine that a coil pattern, where a frequency of resonance current is lower than the first reference frequency and is higher than a second reference frequency lower than the first reference frequency, is a second target coil pattern. Further, the controller (C) may determine that a coil pattern, where a frequency of resonance current is lower than the second reference frequency, is a first target coil pattern. 
     In some implementations, presence of a cooking vessel  150  on the upper plate  100  and a position of a cooking vessel  150  may be determined based on the number and frequency of pulses output from the plurality of coil patterns  510  and detected by each of the plurality of recognizers  550 . In some examples, the controller (C) may determine whether a cooking vessel  150  is made of metal or includes an induction coil. 
     After the position of the cooking vessel  150  is determined, the controller (C) may move the heating module  200  to a position corresponding to the position of the cooking vessel  150 . That is, the controller (C) may move the heating module  200  to a lower side of the cooking vessel based on the determined position of the cooking vessel  150 . 
     In some implementations, even when the user disposes a cooking vessel  150  at any position on the upper plate  100 , a position of the heating module  200  for heating the cooking vessel  150  or for generating induced current in an induction coil provided at the cooking vessel  150  may be automatically adjusted. 
     Specifically, the first target coil pattern and the second target coil pattern may be sensed at the same time. In some examples, position information on the first target coil pattern disposed to completely overlap a cooking vessel  150  may be used to determine a position of the cooking vessel  150 . 
     In some examples, when the first target coil pattern and the second target coil pattern are sensed at the same time, the controller (C) may move the heating module  200  based on a position of the first target coil pattern. 
     In some examples, to determine the position of the cooking vessel  150  more accurately, the controller (C) may use position information on the second target coil pattern for reference. For example, in case that a single first target coil pattern and a plurality of second target coil patterns are sensed at the same time, a position of a cooking vessel  150  may be determined considering position information on the first target coil pattern and position information on the center of the plurality of second target coil patterns. 
     In some implementations, where a size of a cooking vessel  150  is relatively large, a plurality of first target coil patterns may be sensed. In some cases, the controller (C) may sense only the plurality of first target coil patterns. 
     In some implementations, when the plurality of first target coil patterns are sensed, the controller (C) may move the heating module  200  based on a position corresponding to the center of the plurality of first target coil patterns. 
     Further, a size of a cooking vessel  150  may be relatively small, and the cooking vessel  150  may be disposed between adjacent coil patterns. In some examples, a plurality of second target coil patterns may be sensed. That is, the controller (C) may sense only the plurality of second target coil patterns. 
     In some implementations, when the plurality of second target coil patterns are sensed, the controller (C) may move the heating module  200  based on a position corresponding to the center of the plurality of second target coil patterns. 
     The present disclosure, as described above, may determine a position of a cooking vessel  150  on the upper plate  100  accurately and rapidly using the plurality of coil patterns  510  that are arranged in a plurality of rows and in a plurality of columns on the substrate  500 . 
     The present disclosure has been described with reference to the example implementations illustrated in the drawings. Further, the disclosure may be modified in various different forms by one having ordinary skill in the art to which the disclosure pertains within the technical spirit and scope of the disclosure defined in the appended claims. Thus, modifications made to the implementations of the disclosure should be included in the present disclosure.