KR102213164B1 - Heating apparatus for detecting object near crater - Google Patents

Abstract

According to the present disclosure, a heating device includes: an upper plate; a working coil, corresponding to a first flame port of the at least one flame port, heating an object to be heated placed on an area of the upper plate in an induction heating method; and a sensing module extending in a direction away from the center of the first flame port from the edge of the working coil, or a point spaced a predetermined distance from the edge of the working coil, wherein the sensing module is configured to output capacitance which changes according to the type of the object placed on the area of the upper plate corresponding to the sensing module as a sensing signal.

Description

A heating device that detects objects around the crater{HEATING APPARATUS FOR DETECTING OBJECT NEAR CRATER}

The technical idea of the present disclosure relates to a heating device, and in detail, to a heating device for detecting an object around a crater.

Various types of heating devices are used in homes, offices or restaurants for various purposes including cooking or sterilization. Conventionally, gas ranges using gas as fuel have been widely used and widely used, but in recent years, heating devices for heating an object to be heated such as a pot, a frying pan, a steamer, or a kettle using electricity have been popularized.

The heating method using electricity largely includes a resistance heating method and an induction heating method. The resistance heating method is a method of heating an object by directly transferring heat generated when current is passed through a metal resistance wire or a non-metallic heating element such as silicon carbide through radiation or conduction. On the other hand, the induction heating method is a method of generating an induction current in the object to be heated by using a change in the magnetic field (magnetic flux density) generated around the working coil when high-frequency power is applied to the working coil to heat the object to be heated.

On the other hand, the heating device may include a crater indicating a portion for heating the object to be heated. The user of the heating device puts the object to be heated on the area of the upper plate corresponding to the crater, and there are many cases where the position of the object to be heated is located off the center of the crater. There is a problem of not being heated. In addition, there may be a risk of damage to the heating device or burns to the user if the contents boil from the object to be heated, or if the human body comes into contact with the hot crater.

The technical idea of the present disclosure is a method for detecting an object around a crater of a heating device, in particular, detecting a type of material placed around a crater, and controlling a heating device based on the detected type of material in a heating device. And equipment.

In order to achieve the above object, the heating device according to one aspect of the technical idea of the present disclosure corresponds to a first crater among a top plate and at least one crater, and is placed on an area of the top plate corresponding to the first crater. A sensing module that extends in a direction away from the center of the first crater from a working coil for heating an object to be heated by an induction heating method and a point separated by a predetermined distance from the edge of the working coil or the edge of the working coil. The sensing module may include the sensing module configured to output a value of the capacitance that changes according to the type of the object placed on the area of the corresponding upper plate as a sensing signal.

According to the heating device according to an exemplary embodiment of the present disclosure, the type of material placed around the crater can be detected based on the sensing capacitance value output by the sensing module around the working coil corresponding to the crater, and It is possible to inform the user of the heating device of the type of material to be made. Alternatively, various guide phrases including warning phrases may be notified to the user based on the type of the detected substance.

Accordingly, the user can remove the boiled contents from the object to be heated, and prevent damage or failure of the heating device due to the boiled contents.

In addition, if a part of the user (human body) or part of an animal is detected near the crater, a warning message can be notified to the user, and if a dedicated container is detected at a location outside the crater, it is notified to the user so that the user can Can be guided to correct the location of the crater to the center of the crater.

1 shows a heating device according to an exemplary embodiment of the present disclosure.
2 illustrates a working coil and a sensing module corresponding to a crater according to an exemplary embodiment of the present disclosure.
3 shows a heating device according to an exemplary embodiment of the present disclosure.
4 shows a heating device according to an exemplary embodiment of the present disclosure.
5 illustrates a method of operating a heating device according to an exemplary embodiment of the present disclosure.
6A and 6B show a crater according to an exemplary embodiment of the present disclosure.
7 shows a heating device according to an exemplary embodiment of the present disclosure.
8 shows a working coil assembly according to an exemplary embodiment of the present disclosure.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a heating device 1000 according to an exemplary embodiment of the present disclosure. The heating device 1000 may include a first crater 1100, a second crater 1200, a third crater 1300, and a user manipulation unit 1400. FIG. 1 shows that the heating device 1000 includes three craters 1100, 1200, and 1300, but the number of craters is not limited thereto, and includes a larger number of craters or a smaller number of craters. Can include. For example, the heating device 1000 may include only one crater. Further, the arrangement of the craters 1100, 1200, and 1300 is not limited to the arrangement disclosed in FIG. 1. For example, the first crater 1100, the second crater 1200, and the third crater 1300 may be arranged in a row, or may be arranged in any other structure. In addition, FIG. 1 illustrates that the first crater 1100, the second crater 1200, and the third crater 1300 have the same size, but are not limited thereto, and the first crater 1100 and the second crater ( 1200) and at least some of the third crater 1300 may have different sizes.

For convenience of description of the craters 1100, 1200, and 1300, a representative first crater 1100 will be described. The first crater 1100 may use electric energy as an energy source to heat an object to be heated placed on the first crater 1100. To this end, the heating device 1000 may include a heating unit that heats an object under the first crater 1100 by using an electrical principle. The heating unit may include a working coil that generates heat in a dedicated container through an induction action by a magnetic substance, a metal plate that heats the object to be heated by direct heat, or a ceramic plate in which a heating wire is distributed.In addition, various types of heat are generated using electricity. It may include one of the heating elements. The heating device 1000 may include the same type of heating unit under the first cooking area 1100, the second cooking area 1200, and the third cooking area 1300, and at least some are configured to include different types of heating units. It could be. For example, the heating device 1000 may include a working coil under the first crater 1100 and the second crater 1200, and may be a hybrid heating device including a heating element under the third crater 1300. have.

The user manipulation unit 1400 may represent all parts manipulated by the user to control the heating device 1000. The user manipulation unit 1400 may receive an input signal for controlling the craters. The user manipulation unit 1400 may support both a display function and a manipulation function in some cases. The user manipulation unit 1400 may include at least one of various input devices such as a touch panel, a rotation button, a push button, a trackball, a point stick, and a scanner.

The heating apparatus 1000 according to an exemplary embodiment of the present disclosure may include a working coil under at least one of the plurality of craters 1100, 1200, and 1300, and, for example, A working coil may be disposed under an area of the upper plate corresponding to the crater. In an embodiment, the heating device 1000 may include a sensing module disposed around the working coil. The sensing module may extend from the edge of the working coil in a direction away from the center of the crater corresponding to the working coil. The sensing module may output at least one sensing signal including a value of a capacitance that changes according to a type of an object placed on an area of the upper plate corresponding to the sensing module. To this end, the sensing module may include a sensing metal pattern for detecting a change in capacitance, and may include, for example, a copper pattern. In an embodiment, the sensing module may include a first surface facing the upper plate and a second surface opposite to the first surface, and the sensing metal pattern may be configured on the second surface. In an embodiment, the first surface of the sensing module may be disposed to be attached to the upper plate. In an embodiment, the sensing module may include a plurality of sub-sensing circuits each configured to output a sensing signal as shown in FIGS. 6A and 6B.

The heating device 1000 according to the present disclosure will be described in more detail with reference to the following drawings.

2 shows a working coil 110 and a sensing module 130 corresponding to the crater 100 according to an exemplary embodiment of the present disclosure. The crater 100 is any one of a plurality of craters 1100, 1200, and 1300 of the heating device 1000 described in FIG. 1 and may correspond to a crater for heating an object to be heated by an induction heating method. have.

The arrangement of the working coil 110, the gap 120, and the sensing module 130 disclosed in FIG. 2 may represent an arrangement when viewed from the top of the heating device. For example, the heating device may include an upper plate on which an object to be heated is placed, and FIG. 3 may indicate that the working coil 110, the gap 120 and the sensing module 130 are projected onto the upper plate. have.

The working coil 110 may be disposed in a donut-shaped area centered on the crater 100. Here, the donut-shaped area may represent an area between two concentric circles, and when there is no smaller one of the two concentric circles, the donut-shaped area may include a circular area. The working coil 110 may be wound in a spiral shape within a donut-shaped area centered on the center of the crater 100.

The heating device according to an exemplary embodiment of the present disclosure may include a sensing module 130 disposed around the working coil 110 corresponding to the crater. In an embodiment, the sensing module 130 may extend from an edge of the working coil 110 in a direction away from the center of the crater 100. In other words, when the working coil 110 is disposed in a donut-shaped area centered on the center of the crater 100, the sensing module 130 may be disposed to extend radially from the edge of the working coil 110. . Here, the expression "extending from the edge" of the working coil 110 means a gap from the edge of the working coil 110 as shown in FIG. 2 as well as when extending in the radial direction adjacent to the edge of the working coil 110 It includes the case extending in the radial direction from the point where 120) is placed.

3 shows a heating device 10 according to an exemplary embodiment of the present disclosure. The heating device 10 may include an upper plate 200, a working coil 110 and a sensing module 130. The overlapping description of the working coil 110 and the sensing module 130 with FIGS. 1 and 2 will be omitted.

An object to be heated may be placed on the upper plate 200. For example, the upper plate 200 may include a first surface on which an object to be heated is placed and a second surface opposite to the first surface. The upper plate 200 may include at least one of various materials such as glass, stainless steel, wood, and marble. In general, the user of the heating device 10 may place the heating target body on the area of the upper plate 200 corresponding to the working coil 110. However, in some cases, the object to be heated may be placed in an area outside the area of the upper plate 200 corresponding to the working coil 110 due to a user's mistake or unexpected cause. In this case, the object to be heated may not be normally heated. In addition, when a liquid-like content boils and overflows from the object to be heated and flows around the crater, a failure of the heating device 10 may be caused.

The working coil 110 may heat an object to be heated placed on a corresponding crater by an induction heating method. For example, the object to be heated placed on an area of the upper plate 200 corresponding to the corresponding crater can be heated. Can be heated. To this end, the working coil 110 may be disposed under the upper plate 200. In one embodiment, the working coil 110 may include coil strands 112 that are spirally wound from a point separated by a predetermined distance from the center of a corresponding crater to the edge of the working coil 110. In some cases, the working coil 110 may include a plurality of coil strands connected in series or in parallel.

The sensing module 130 may extend in a direction away from the center of the crater from an edge of the working coil 110 or a point spaced apart from the edge of the working coil 110 by a predetermined interval. For example, when the working coil 110 is disposed in a donut-shaped area having a center of a crater as a center, the sensing module 130 may be disposed in a donut-shaped area surrounding the working coil 110. In one embodiment, the sensing module 130 may be attached to the second surface of the upper plate 200. In addition, in an embodiment, the sensing module 130 may include a first surface attached to the upper plate 200 and a second surface opposite to the first surface, and the sensing module 130 is formed on the second surface. The sensing metal pattern may be included, and the sensing metal pattern may include a copper pattern.

According to the heating device 10 according to an exemplary embodiment of the present disclosure, the sensing module 130 is disposed so as to surround the working coil 110, so that the heating device 10 is a top plate 200 corresponding to the sensing module 130. The type of object placed on the area of) can be determined. In particular, since the sensing module 130 according to the exemplary embodiment of the present disclosure is attached to the second surface of the upper plate 200, the sensing sensitivity of the capacitance value may be increased.

4 shows a heating device 10 according to an exemplary embodiment of the present disclosure. The heating device 10 may include a sensing module 130, a control unit 300, a memory 400, a notification unit 500, and a working coil driver 600. A description of the sensing module 130 that is duplicated with FIGS. 1 to 3 will be omitted. In an embodiment, the sensing module 130 and the working coil driver 600 may correspond to one crater.

As described with reference to FIGS. 1 to 3, the sensing module 130 may be disposed so that the area projected on the upper plate surrounds the working coil area, and may be attached to the second surface of the upper plate. Accordingly, when a specific material is placed in the area of the upper plate corresponding to the sensing module 130, the sensing module 130 may sense a different capacitance value according to the type of material placed on the area of the corresponding upper plate. , At least one sensing signal SS including at least one sensing capacitance value may be output. The sensing module 130 may provide a sensing signal SS to the controller 300.

The controller 300 may control the overall operation of the heating device 10. The control unit 300 may be implemented in various forms, such as a central processing unit (CPU), a microprocessor, an application processor (AP), a micro controller unit (MCU), a microcomputer, or a mini computer. The controller 300 may process or execute programs and/or data stored in the memory 400. For example, the controller 300 may control at least one of various functions of the heating device 10 by executing programs stored in the memory 400.

The memory 400 may store information about the heating device 10 and various types of information necessary for controlling the heating device 10. For example, the memory 400 may store various types of information, algorithms, and instructions necessary for a control operation of the controller 300. The memory 400 may include at least one of a nonvolatile memory such as a flash memory and a magnetoresistive memory, and a volatile memory such as DRAM and SRAM. The memory 400 may be implemented as hardware separate from the controller 300. However, the present invention is not limited thereto, and for example, when the control unit 300 is implemented as a microcomputer or a minicomputer, the memory 400 may be implemented as one piece of hardware with the control unit 300.

The memory 400 according to an exemplary embodiment of the present disclosure may store reference capacitance information (Cref_Info) including at least one reference capacitance value, and provide reference capacitance information (Cref_Info) to the controller 300 can do. The reference capacitance information Cref_Info may include a plurality of expected material types MT corresponding to each of the plurality of capacitance value ranges CV. For example, the expected material type corresponding to the range of the capacitance value between the first reference capacitance value (Cref_1) and the second reference capacitance value (Cref_2) is the first material type (MT_1), and the third reference capacitance value. The expected material type corresponding to the range of the capacitance value between the capacitance value (Cref_3) and the fourth reference capacitance value (Cref_4) is the second material type (MT_2), and the m-th reference capacitance value (Cref_m) and the m-th The expected material type corresponding to the range of the capacitance value between the +1 reference capacitance value Cref_m+1 may be the kth material type MT_k. However, each of k and m may have an arbitrary natural number of 2 or more. In an embodiment, the plurality of expected substance types MT may include a liquid, a human body or an animal, a dedicated container, and the like.

Based on the at least one sensing signal SS received from the sensing module 130 and the reference capacitance information Cref_Info received from the memory 400, the controller 300 The type of material placed on the area may be determined, and the notification unit 500 and/or the working coil driving unit 600 may be controlled based on the determined type of material. For example, the controller 300 may provide a notification control signal CTRL_a for controlling the notification unit 500 based on the determined type of substance to the notification unit 500, and the determined type of substance As a basis, a switching control signal CTRL_s for controlling the working coil driver 600 may be provided to the working coil driver 600.

The notification unit 500 may provide various information on the operation of the heating device 10 to a user of the heating device 10 by a visual method, an auditory method, or another sensory method. For example, the notification unit 500 may include various types of displays and/or various types of speakers. In addition, for example, the notification unit 500 may be configured to correspond to the user manipulation unit 1400 of FIG. 1 and receive an input from the user and provide predetermined information to the user. In one embodiment, the notification unit 500, based on the notification control signal CTRL_a provided from the control unit 300, the type of material determined to be placed on the area of the upper plate corresponding to the sensing module 130, and / Or a message according to the determined type of material may be notified to the user of the heating device 10.

The working coil driver 600 may drive a corresponding working coil based on the switching control signal CTRL_s. For example, the working coil driver 600 may include an inverter, and may drive a connected working coil by generating AC power based on the switching control signal CTRL_s. In one embodiment, when a liquid or a part of a body is sensed on the area of the upper plate corresponding to the sensing module 130 by the control unit 300, the control unit 300 controls the working coil driver 600 to A switching control signal CTRL_s may be provided to the working coil driver 600 to reduce the intensity or stop generation of AC power.

5 illustrates a method of operating a heating device according to an exemplary embodiment of the present disclosure. 5 is described with reference to FIGS. 3 and 4 together.

The heating device 10 may receive at least one sensing signal SS from the sensing module 130 (S120). At least one sensing signal SS may include at least one sensing capacitance value, and the at least one sensing capacitance value is a material placed on an area of the upper plate 200 corresponding to the sensing module 130 It may include a capacitance value that varies depending on the type of. In an embodiment, the sensing module 130 may provide at least one sensing signal SS to the controller 300. In an embodiment, step S120 may be performed in the heating device 10 at each predetermined first time interval. Alternatively, in an embodiment, step S120 may be performed at a point in time when a heating operation starts to be performed in a crater corresponding to the sensing module 130. Alternatively, in an embodiment, step S120 may be performed at predetermined second time intervals after the heating operation starts to be performed in the crater corresponding to the sensing module 130.

The heating device 10 is based on the reference capacitance information Cref_Info including at least one sensing signal SS output from the sensing module 130 and at least one reference capacitance value, and the sensing module 130 It is possible to determine the type of material on the area of the corresponding upper plate 200 (S140). In one embodiment, the controller 300 includes the sensing capacitance value by comparing the sensing capacitance value included in the sensing signal SS with ranges of a plurality of capacitance values included in the reference capacitance information Cref_Info. The type of the material on the area of the upper plate 200 corresponding to the sensing module 130 may be determined by determining the range of the determined capacitance value and determining the type of the material corresponding to the determined range of the capacitance value. For example, the control unit 300 determines the type of the material on the area of the upper plate 200 corresponding to the sensing module 130 based on the sensing signal SS and the reference capacitance information Cref_Info. It can be judged as at least one of the exclusive containers.

The heating device 10 may control the notification unit 500 and/or the working coil driving unit 600 based on the determined type of material (S160). For example, the control unit 300 transmits a notification control signal CTRL_a to inform the user of the heating device 10 of a message corresponding to the determined type of substance and/or the determined substance by the notification unit 500. It may be provided to the notification unit 500. In one embodiment, the message may include a message warning the user of the heating device 10.

For example, when it is determined that a liquid exists on the area of the upper plate 200 corresponding to the sensing module 130, the controller 300 informs the notification unit 500 that'the content has overflowed from the heated object'. The notification unit 500 is controlled to notify the user of the heating device 10 through a visual method and/or an audible method, and/or a message indicating that a liquid foreign substance has been detected around the crater. can do. In one embodiment, when it is determined that the liquid is present on the area of the upper plate 200 corresponding to the sensing module 130, the control unit 300 determines that the working coil driver 600 reduces the output of the working coil or , It is possible to control the working coil driving unit 600 to drive the working coil so that the operation of the working coil is stopped.

In addition, for example, when it is determined that a part of a human body or an animal exists on the area of the upper plate 200 corresponding to the sensing module 130, the controller 300 indicates that the notification unit 500 A notification unit to notify the user of the heating device 10 with a message to the effect of 'has been detected' and/or to the user of the heating device 10 through a visual method and/or an audible method. 500) can be controlled. In one embodiment, when it is determined that a part of a human body or an animal exists on the area of the upper plate 200 corresponding to the sensing module 130, the controller 300 controls the working coil driver 600 to output the working coil. The working coil driving unit 600 may be controlled to reduce or to drive the working coil to stop the operation of the working coil.

In addition, for example, when it is determined that a dedicated container exists on the area of the upper plate 200 corresponding to the sensing module 130, the controller 300 indicates that the notification unit 500 detects a dedicated container near the crater. A heating device that heats at least one of the messages to the effect of'It was done', the message to the effect of'The location of the exclusive container is not properly placed', and the message to the effect of'Please place the exclusive container correctly in the center of the crater' The notification unit 500 may be controlled to notify the user of (10) through a visual method and/or an auditory method.

6A and 6B illustrate craters 100a and 100b according to an exemplary embodiment of the present disclosure. 6A and 6B particularly illustrate an embodiment in which the sensing modules 130a and 130b include a plurality of sub-sensing circuits. For example, the sensing modules 130a and 130b may include a plurality of sub-sensing circuits spaced apart from each other along the circumferential direction based on the center of the crater, which will be described in detail below.

Referring to FIG. 6A, the heating device may include a working coil 110 and a sensing module 130a corresponding to the crater 100a. A gap 120 may exist between the working coil 110 and the sensing module 130a. The sensing module 130a senses at least one sensing signal by sensing a capacitance value that changes according to the type of material placed on the area of the upper plate corresponding to the sensing module 130a, as described with reference to the preceding drawings. Can be printed.

The sensing module 130a may include a first sub-sensing circuit 130a_1 and a second sub-sensing circuit 130a_2. The first sub-sensing circuit 130a_1 may output a first sensing signal by sensing a capacitance value that changes according to the type of material placed on the area of the upper plate corresponding to the first sub-sensing circuit 130a_1. . The second sub-sensing circuit 130a_2 may output a second sensing signal by sensing a capacitance value that changes according to the type of material placed on the area of the upper plate corresponding to the second sub-sensing circuit 130a_2. .

In an embodiment, the first sub-sensing circuit 130a_1 and the second sub-sensing circuit 130a_2 may have the same size, and may include gaps 131a_1 and 131a_2 therebetween. However, it is not limited thereto, and the first sub-sensing circuit 130a_1 and the second sub-sensing circuit 130a_2 may have different lengths on the circumference, for example, the circumference of the first sub-sensing circuit 130a_1 The length of the image may be longer than the length of the circumferential image of the second sub sensing circuit 130a_2.

The heating device may determine the type of material placed on the area of the upper plate corresponding to the first sub-sensing circuit 130a_1 based on the first sensing signal output from the first sub-sensing circuit 130a_1. Likewise, the heating device may determine the type of material placed on the area of the upper plate corresponding to the second sub-sensing circuit 130a_2 based on the second sensing signal output from the second sub-sensing circuit 130a_2. The heating device may control the notification unit and/or the working coil driver based on the types of materials determined to exist on the area of the upper plate corresponding to each of the plurality of sub-sensing circuits. In particular, in an embodiment, as the sensing module 130a includes a plurality of sub-sensing circuits, the heating device may determine a direction in which a specific material is present. For example, when a liquid is sensed on the area of the upper plate corresponding to the first sub-sensing circuit 130a_1 and no material is detected on the area of the upper plate corresponding to the second sub-sensing circuit 130a_2, the heating device May determine that the content flowed from the heated object in a direction from the center of the crater 100a toward the first sub-sensing circuit 130a_1. Similarly, for example, when a liquid is detected on an area of the upper plate corresponding to the first sub-sensing circuit 130a_1 and a liquid is also detected on the area of the upper plate corresponding to the second sub-sensing circuit 130a_2, the heating device Can determine that the content flows from the heated object in a direction from the center of the crater 100a toward the first sub-sensing circuit 130a_1 and from the center of the crater 100a toward the second sub-sensing circuit 130a_2. have.

Referring to FIG. 6B, the heating device may include a working coil 110 and a sensing module 130b corresponding to the crater 100b. A gap 120 may exist between the working coil 110 and the sensing module 130b. The sensing module 130b senses at least one sensing signal by sensing a value of capacitance that changes according to the type of material placed on the area of the upper plate corresponding to the sensing module 130b, as described with reference to the preceding drawings. Can be printed.

The sensing module 130b may include a first sub-sensing circuit 130b_1, a second sub-sensing circuit 130b_2, and a third sub-sensing circuit 130b_3. The first sub-sensing circuit 130b_1 may output a first sensing signal by sensing a capacitance value that changes according to the type of material placed on the area of the upper plate corresponding to the first sub-sensing circuit 130b_1. . The second sub-sensing circuit 130b_2 may output a second sensing signal by sensing a capacitance value that changes according to the type of material placed on the area of the upper plate corresponding to the second sub-sensing circuit 130b_2. . The third sub-sensing circuit 130b_3 may output a third sensing signal by sensing a value of capacitance that changes according to the type of material placed on the area of the upper plate corresponding to the third sub-sensing circuit 130b_3. .

In an embodiment, the first sub-sensing circuit 130b_1, the second sub-sensing circuit 130b_2, and the third sub-sensing circuit 130b_3 may have the same size, and gaps 131b_1, 131b_2, 131b_3 between them It may include. However, the present invention is not limited thereto, and at least some of the first sub-sensing circuit 130b_1, the second sub-sensing circuit 130b_2, and the third sub-sensing circuit 130b_3 may have different lengths on the circumference.

The heating device may determine the type of material placed on the area of the upper plate corresponding to the first sub-sensing circuit 130b_1 based on the first sensing signal output from the first sub-sensing circuit 130b_1. Similarly, the heating device may determine the type of material placed on the area of the upper plate corresponding to the second sub-sensing circuit 130b_2 based on the second sensing signal output from the second sub-sensing circuit 130b_2. Likewise, the heating device may determine the type of material placed on the area of the upper plate corresponding to the third sub-sensing circuit 130b_3 based on the third sensing signal output from the third sub-sensing circuit 130b_3. The heating device may control the notification unit and/or the working coil driver based on the types of materials determined to exist on the area of the upper plate corresponding to each of the plurality of sub-sensing circuits. In particular, in an embodiment, as the sensing module 130b includes a plurality of sub-sensing circuits, the heating device may determine a direction in which a specific material is present. For example, a liquid is sensed on an area of the upper plate corresponding to the first sub-sensing circuit 130b_1, and on the area of the upper plate corresponding to the second sub-sensing circuit 130b_2 and the third sub-sensing circuit 130b_3 When the material is not detected, the heating device may determine that the content flows from the center of the crater 100b toward the first sub-sensing circuit 130b_1 from the object to be heated. Similarly, for example, liquid is sensed on the area of the upper plate corresponding to the first sub-sensing circuit 130b_1 and the second sub-sensing circuit 130b_2, and the area of the upper plate corresponding to the third sub-sensing circuit 130b_3 When no material is detected, the heating device operates in a direction in which the contents from the heated object face the first sub-sensing circuit 130b_1 from the center of the crater 100b and the second sub-sensing circuit 130b_2 from the center of the crater 100b. It can be determined that it has flowed in the direction toward ).

7 shows a heating device 20 according to an exemplary embodiment of the present disclosure. In particular, FIG. 7 is a cross-sectional view of a heating device 20 according to an exemplary embodiment of the present disclosure cut in a plane perpendicular to the upper plate 200. The heating device 20 may include a working coil 110, a sensing module 130, an upper plate 200, a working coil base 700, and a ferrite 800. The overlapping description of the working coil 110, the sensing module 130, and the upper plate 200 with FIGS. 1 to 6B will be omitted.

The working coil 110, the sensing module 130, and the ferrite 800 may be coupled to the working coil base 700. The working coil base 700 may include a first surface adjacent to the upper plate 200 and a second surface opposite to the first surface. The working coil 110 may be disposed at a place having a predetermined depth from the first surface of the working coil base 700, and the ferrite 800 may be disposed at a place having a predetermined depth from the second surface of the working coil base 700. Can be placed. The working coil base 700 may include a sensing module insertion groove into which the sensing module 130 may be inserted. As the sensing module 130 is inserted into the sensing module insertion groove, the first surface of the sensing module 130 may extend from the first surface of the working coil base 700 to exhibit a flat shape, and as a result, the sensing module ( The first surface of 130 may also be adjacent to the upper plate 200. A perspective view of a working coil assembly in which the working coil 110 and the sensing module 130 are coupled to the working coil base 700 is shown in FIG. 8.

The ferrite 800 is made of a ferromagnetic material having a high magnetic permeability, such as a ferri magnetic material, and may enhance the magnetic flux density generated by the working coil 110. The ferrite 800 may be replaced with at least one of high permeability materials such as Si-Fe, Co-Fe, and Ni-Fe in addition to ferrite. The ferrite 800 may be disposed near the second surface of the working coil base 700.

8 illustrates a working coil assembly 150 according to an exemplary embodiment of the present disclosure. FIG. 8 illustrates an embodiment in which the sensing module includes a plurality of sub-sensing circuits 130_1, 130_2, and 130_3, as shown in FIG. 6B. The working coil assembly 150 may include a working coil 110, a sensing module including a plurality of sub sensing circuits 130_1, 130_2, and 130_3, and a working coil base 700. The working coil assembly 150 may be configured in a heating device so as to correspond to one crater.

The working coil 110 may be disposed in a donut-shaped area from a point spaced a certain distance from the center of the cooking zone or the center of the working coil assembly 150 to the edge of the working coil 110, and within the donut-shaped area The strands can be wound in a spiral.

The plurality of sub-sensing circuits 130_1, 130_2, and 130_3 may extend in a direction away from the center of the working coil assembly 150 from an edge or a point spaced apart from the edge of the working coil 110 by a predetermined distance. For example, as shown in FIG. 8, each of the plurality of sub-sensing circuits 130_1, 130_2, and 130_3 will be disposed in an area divided into three areas along the circumferential direction of the donut-shaped area surrounding the working coil 110. I can.

The working coil base 700 may include a plurality of sensing module insertion grooves accommodating each of the plurality of sub-sensing circuits 130_1, 130_2, and 130_3. Each of the plurality of sub-sensing circuits 130_1, 130_2, and 130_3 may be coupled to each of the plurality of sensing module insertion grooves.

As described above, exemplary embodiments have been disclosed in the drawings and specification. In the present specification, the embodiments have been described using specific terms, but these are only used for the purpose of describing the technical idea of the present disclosure, and are not used to limit the meaning or the scope of the present disclosure described in the claims. . Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical scope of the present disclosure should be determined by the technical spirit of the appended claims.

Claims (8)

A heating device comprising at least one crater,
Top plate;
A working coil corresponding to a first crater among the at least one crater and for heating an object to be heated placed on an area of the upper plate corresponding to the first crater by an induction heating method; And
A sensing module extending in a direction away from the center of the first crater from an edge of the working coil or a point spaced apart from the edge of the working coil by a predetermined distance, and placed on an area of the upper plate corresponding to the sensing module And the sensing module configured to output a value of capacitance that changes according to the type of object as a sensing signal,
The sensing module includes a first surface facing an upper plate and a second surface opposite to the first surface, the second surface including a sensing metal pattern for detecting a change in capacitance, and the first surface Heating device that is attached to the lower portion of the upper plate. The method of claim 1,
A notification unit configured to notify information to a user of the heating device by using at least one of sensory methods including visual or auditory methods; And
Based on the sensing signal received from the sensing module and reference capacitance information including at least one reference capacitance value, the type of material on the area of the upper plate corresponding to the sensing module is determined, and the determined material Heating device, characterized in that it further comprises a control unit configured to control the notification unit based on the type of. The method of claim 2,
The reference capacitance information,
Including a range of a plurality of reference capacitance values corresponding to each of the liquid, the human body and the exclusive container,
The control unit,
A range of a reference capacitance value including the sensing capacitance value is determined by comparing a sensing capacitance value included in the sensing signal and a range of the plurality of reference capacitance values, and the range of the determined reference capacitance value And determining the type of the substance on the upper plate region as one of a liquid, a human body, and an exclusive container, and controlling the notification unit based on the determined type of the substance. The method of claim 1,
The working coil,
It is spirally wound in a direction away from the center of the first crater,
The sensing module,
The heating device, characterized in that the shape projected onto the upper plate has a circular ring shape having a predetermined thickness from an edge of the working coil. The method of claim 1,
The sensing module,
A plurality of sub-sensing circuits spaced apart from each other along a circumferential direction based on the center of the first crater, wherein each of the plurality of sub-sensing circuits detects a change in capacitance and outputs a plurality of sub-sensing signals. Heating device comprising sensing circuits. The method of claim 5,
Each of the plurality of sub-sensing circuits,
Heating device, characterized in that they have the same size with each other. The method of claim 1,
The heating device,
Further comprising a working coil base accommodating the working coil and including a first surface adjacent to the upper plate and a second surface opposite to the first surface,
The working coil base,
And a sensing module insertion groove in which one surface of the sensing module extends from the first surface and is inserted so that the one surface of the sensing module is adjacent to the upper plate. The method of claim 7,
The sensing module,
A heating device comprising a copper pattern provided on a surface opposite to the one surface of the sensing module and configured to sense a capacitance.

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