Induction heating conditioner

Abstract

To provide an induction heating cooker capable of improving the detection range of a temperature sensor.SOLUTION: A disclosed induction heating cooker includes: a top plate (2) on which an object to be heated (C) is placed; a heating coil (10) that is placed below the top plate (2) for induction heating the object to be heated (C); a temperature sensor (21) that is placed below the top plate (2) for detecting temperature information of the object to be heated (C); and a drive unit (23) that changes the position of the temperature sensor (21) viewed from the thickness direction (Z-axis direction) of the top plate (2).SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to an induction cooker. [Background technology]

[0002] Patent Document 1 discloses an induction heating cooker that can determine if a cooking pot with a curved bottom is misaligned.

[0003] The induction cooking appliance described in Patent Document 1 includes a plate, a heating coil, and a temperature detection unit. The plate has a mounting portion on which an object to be heated is placed. The heating coil is located below the plate and heats the object to be heated. The temperature detection unit is composed of one temperature sensor in the center of the heating coil and a linear conductive material whose conductor resistance changes depending on the temperature, routed around the underside of the plate facing the heating coil. The temperature detection unit is arranged in multiple divided regions around the circumferential direction of the heating coil, and detects whether the pot is misaligned from the center of the heating coil by comparing the temperature sensor in the center of the heating coil with the regions diagonally opposite each region. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-46551 Summary of the Invention [Problem to be solved by the invention]

[0005] The induction heating cooker described in Patent Document 1 still has room for improvement in terms of increasing the detection range of the temperature sensor.

[0006] Therefore, an object of the present disclosure is to solve the above-mentioned problems and to provide an induction heating cooker that can improve the detection range of a temperature sensor. [Means for solving the problem]

[0007] An induction heating cooker according to one aspect of the present disclosure includes: a top plate on which an object to be heated is placed; a heating coil disposed below the top plate and configured to induction heat the object to be heated; a temperature sensor disposed below the top plate and configured to detect temperature information of the object to be heated; a driving unit that changes the position of the temperature sensor when viewed in a thickness direction of the top plate; Equipped with. [Effects of the Invention]

[0008] According to the present disclosure, an induction heating cooker that can improve the detection range of a temperature sensor can be provided. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic perspective view of an example of an induction heating cooker according to a first embodiment of the present disclosure. [Figure 2] 1 is a schematic block diagram showing a main configuration of an induction heating region according to a first embodiment of the present disclosure. [Figure 3] 1 is a schematic plan view of an example of a coil unit according to a first embodiment of the present disclosure. [Figure 4A] 10A and 10B are schematic plan views showing an example of the operation of the coil unit. [Figure 4B] 10A and 10B are schematic plan views showing an example of the operation of the coil unit. [Figure 4C] 10A and 10B are schematic plan views showing an example of the operation of the coil unit. [Figure 4D] 10A and 10B are schematic plan views showing an example of the operation of the coil unit. [Figure 4E] 10A and 10B are schematic plan views showing an example of the operation of the coil unit. [Figure 4F] 10A and 10B are schematic plan views showing an example of the operation of the coil unit. [Figure 4G] 10A and 10B are schematic plan views showing an example of the operation of the coil unit. [Figure 5]5 is a flowchart showing an example of an operation of the induction heating cooker according to the first embodiment of the present disclosure. [Figure 6] 10 is a flowchart showing another example of the operation of the induction heating cooker according to the first embodiment of the present disclosure. [Figure 7] FIG. 10 is a schematic plan view of a coil unit according to a first modified example. [Figure 8] FIG. 10 is a schematic plan view of a coil unit according to a second modification. [Figure 9A] FIG. 11 is a schematic plan view of an induction heating region of Modification 3. [Figure 9B] 10 is a schematic diagram showing the operation of a temperature sensor of Modification 3. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present disclosure will be described below with reference to the accompanying drawings. Note that the following description is merely exemplary in nature and is not intended to limit the present disclosure, its applications, or its uses. Furthermore, the drawings are schematic, and the ratios of the dimensions and the like do not necessarily correspond to reality.

[0011] It should be noted that, in this specification, terms such as "first," "second," etc. are used for descriptive purposes only and should not be understood as expressing or implying the relative importance or ranking of technical features. Features qualified as "first" and "second" expressly or imply the inclusion of one or more of such features.

[0012] (Embodiment 1) [Overall configuration] 1 is a schematic perspective view of an example of an induction heating cooker 100 according to a first embodiment of the present disclosure. Note that the XYZ coordinate system shown in the figure is intended to facilitate understanding of the invention and does not limit the invention. The X-axis direction indicates the left-right direction, the Y-axis direction indicates the depth direction, and the Z-axis direction indicates the vertical direction.

[0013] As shown in Fig. 1, the induction heating cooker 100 is a cooker that induction heats a cooking container C that contains an object to be cooked T. In this specification, the cooking container C is described as an example of an object to be heated. The object to be heated is not limited to the cooking container C, and may be any object that can be induction heated.

[0014] The induction heating cooker 100 has a top plate 2 made of, for example, heat-resistant glass on which a cooking container C is placed, and a housing 3 attached to the underside of the top plate 2. A plurality of coil units 1 are mounted inside the housing 3. Each of the plurality of coil units 1 is disposed below the top plate 2 and induction heats the cooking container C placed on the opposing part of the top plate 2. That is, each of the plurality of coil units 1 functions as an induction heating coil unit.

[0015] Fig. 2 is a schematic block diagram showing a main configuration of the induction heating cooker 100 according to the first embodiment of the present disclosure. Fig. 3 is a schematic plan view of an example of the coil unit 1 according to the first embodiment of the present disclosure.

[0016] As shown in FIG. 2, the induction heating cooker 100 includes a coil unit 1, a control unit 30, a position sensor 31, and an information output unit 32.

[0017] [Coil unit] First, the coil unit 1 will be described with reference to Figures 2 and 3. As shown in Figures 2 and 3, the coil unit 1 includes a heating coil 10, a first temperature sensor 21, a second temperature sensor 22, and a driver .

[0018] <Heating coil> The heating coil 10 is disposed below the top plate 2 and inductively heats an object to be heated. In this embodiment, the heating coil 10 includes a first heating coil 11A and a second heating coil 11B. The first heating coil 11A and the second heating coil 11B are disposed with a gap SP1 between them. The gap SP1 is linear in plan view.

[0019] For example, the first heating coil 11A and the second heating coil 11B use a strip-shaped coil wire. The strip-shaped coil wire is a coil wire made by twisting a plurality of insulated thin wires, such as copper wires or aluminum wires, and then stacking the coil wire in a row in multiple stages in the height direction (Z-axis direction) to form a strip-shaped coil wire. Specifically, the first heating coil 11A and the second heating coil 11B are formed by stacking a coil wire made of a plurality of twisted thin wires in a row in five stages in the height direction to form a strip-shaped coil wire, and then winding the strip-shaped coil wire multiple times, for example, nine times.

[0020] The heating coil 10 is induction-heated by a first heating coil 11A and a second heating coil 11B. The first heating coil 11A and the second heating coil 11B each have a D-shape in a plan view and are arranged back-to-back to form a substantially circular shape. Specifically, in a plan view, the first heating coil 11A and the second heating coil 11B each have a linear portion and a curved portion connected to the linear portion and curved in an arc. In a plan view, the first heating coil 11A and the second heating coil 11B are arranged so that the linear portions face each other with a gap SP1 between them. In this specification, "plan view" means a view from the vertical direction, i.e., the Z-axis direction. Alternatively, "plan view" means a view from the thickness direction of the top plate 2.

[0021] The heating coil 10 is configured to be rotatable in a rotation direction DR1 in a plan view. Specifically, the heating coil 10 is rotated in the rotation direction DR1 by a drive unit 23. The rotation direction DR1 is a clockwise or counterclockwise direction in a plan view.

[0022] The heating of the heating coil 10 is controlled by the control unit 30. For example, the current input to the heating coil 10 is controlled by the control unit 30.

[0023] <First temperature sensor> The first temperature sensor 21 is disposed below the top plate 2 and detects temperature information of the object to be heated. The first temperature sensor 21 is disposed in an area S1 in which the heating coil 10 is disposed in a plan view. The area S1 is an area in which the heating coil 10 is disposed in a plan view, and means an area that can be heated by the heating coil 10. In this embodiment, the area S1 has a circular shape in a plan view.

[0024] Moreover, the first temperature sensor 21 is disposed in a gap SP1 between the first heating coil 11A and the second heating coil 11B in a plan view.

[0025] The first temperature sensor 21 is a non-contact temperature sensor, such as an infrared sensor. Therefore, the first temperature sensor 21 receives infrared rays emitted from the object to be heated as temperature information of the object to be heated. For example, the first temperature sensor 21 includes a photodiode that receives infrared rays and a circuit that outputs a current generated in the photodiode as an infrared signal.

[0026] The temperature information acquired by the first temperature sensor 21 is transmitted to the control unit 30.

[0027] In this embodiment, the first temperature sensor 21 includes two infrared sensors 21A and 21B. In this specification, the two infrared sensors 21A and 21B are referred to as the first infrared sensor 21A and the second infrared sensor 21B. The first infrared sensor 21A and the second infrared sensor 21B are arranged in a gap SP1 between the first heating coil 11A and the second heating coil 11B, with the second temperature sensor 22 sandwiched therebetween.

[0028] The first infrared sensor 21A and the second infrared sensor 21B are configured to be movable within the gap SP1. Specifically, the first infrared sensor 21A and the second infrared sensor 21B are moved back and forth within the gap SP1 by the drive unit 23. In this embodiment, the first infrared sensor 21A and the second infrared sensor 21B move back and forth linearly within the gap SP1.

[0029] Furthermore, the first infrared sensor 21A and the second infrared sensor 21B move in a rotation direction DR1 of the heating coil 10 due to the rotation of the heating coil 10. That is, the first infrared sensor 21A and the second infrared sensor 21B move so as to revolve around the rotation center of the heating coil 10 as an axis in a plan view.

[0030] In this way, when viewed in the thickness direction (Z-axis direction) of the top plate 2, the first infrared sensor 21A and the second infrared sensor 21B are configured to be movable in the area where the heating coil 10 is arranged.

[0031] <Second temperature sensor> The second temperature sensor 22 is disposed on the lower surface of the top plate 2 and detects temperature information of the object to be heated. In a plan view, the second temperature sensor 22 is disposed within the region S1 in which the heating coil 10 is disposed.

[0032] The second temperature sensor 22 is disposed at the center of the region S1 in plan view, i.e., at the rotation center of the heating coil 10. The second temperature sensor 22 is disposed in the gap SP1 between the first heating coil 11A and the second heating coil 11B in plan view. The second temperature sensor 22 is fixed to the coil unit 1. Therefore, the second temperature sensor 22 rotates around its center in accordance with the movement of the coil unit 1, but does not move back and forth in a straight line like the first temperature sensor 21.

[0033] The second temperature sensor 22 is a contact-type temperature sensor, such as a thermistor, a thermocouple, or a side temperature resistor. The second temperature sensor 22 is in contact with the top plate 2 and detects temperature information of the object to be heated through the top plate 2. For example, if the second temperature sensor 22 is a thermistor, the second temperature sensor 22 detects the thermistor resistance as temperature information of the object to be heated. If the second temperature sensor 22 is a thermocouple, the voltage generated between two types of conductors is detected as temperature information of the object to be heated.

[0034] The temperature information acquired by the second temperature sensor 22 is transmitted to the control unit 30.

[0035] <Drive unit> The driving unit 23 changes the position of the first temperature sensor 21 as viewed in the thickness direction (Z-axis direction) of the top plate 2. The driving unit 23 moves the temperature sensor 21 back and forth as viewed in the thickness direction (Z-axis direction) of the top plate 2. The driving unit 23 also moves the temperature sensor 21 in the rotation direction DR1 by rotating the heating coil 10 in the rotation direction DR1 as viewed in the thickness direction (Z-axis direction) of the top plate 2.

[0036] For example, the driving unit 23 includes a first driving mechanism that moves the first temperature sensor 21 back and forth within the gap SP1, and a second driving mechanism that rotates the heating coil 10 in the rotation direction DR1.

[0037] For example, the first drive mechanism and the second drive mechanism may be configured by combining a gear and a motor. Alternatively, the first drive mechanism and the second drive mechanism may be configured by combining a motor and a belt. The first drive mechanism and the second drive mechanism may be interlocked. By interlocking the first drive mechanism and the second drive mechanism, the rotation of the heating coil 10 and the reciprocating movement of the first temperature sensor 21 can be interlocked. Alternatively, the first drive mechanism may be configured by a solenoid.

[0038] [Control Unit] 2, the control unit 30 controls the heating coil 10 and the drive unit 23. The control unit 30 controls the output of the heating coil 10, and also controls the reciprocating movement of the first temperature sensor 21 and the rotation of the heating coil 10. The control unit 30 also controls the information output unit 32.

[0039] The control unit 30 can be realized by semiconductor elements or the like. The control unit 30 can be configured by, for example, a microcomputer, a CPU, an MPU, a GPU, a DSP, an FPGA, or an ASIC. The functions of the control unit 30 may be configured by hardware alone, or may be realized by combining hardware and software. The control unit 30 realizes predetermined functions by reading data and programs stored in a storage unit such as a memory and performing various arithmetic processing.

[0040] For example, the control unit 30 can be realized by a control circuit including an inverter that controls the output of the heating coil 10 and / or a driver that controls the drive source of the drive unit 23.

[0041] The control unit 30 acquires temperature information of the heating object from the first temperature sensor 21 and the second temperature sensor 22. The control unit 30 acquires position information of the first temperature sensor 21 from a position sensor 31, which will be described later.

[0042] The control unit 30 controls the heating coil 10 and the driving unit 23 based on the acquired temperature information and position information. Specifically, the control unit 30 calculates the heating state of the object to be heated based on the temperature information and position information, and controls the heating coil 10 and the driving unit 23 based on the calculated heating state. For example, the control unit 30 calculates the temperature distribution on the underside of the object to be heated based on the temperature information and position information, and controls the output of the heating coil 10 and the rotation of the heating coil 10 by the driving unit 23 based on the calculated temperature distribution.

[0043] For example, the control unit 30 controls the first heating coil 11A and the second heating coil 11B separately. For example, the control unit 30 may turn on the heating of the first heating coil 11A and turn off the heating of the second heating coil 11B. Alternatively, the control unit 30 may make the heating of the first heating coil 11A stronger, weaker, or substantially the same as the heating of the second heating coil 11B.

[0044] For example, the control unit 30 may control the driving unit 23 to change the positions of the first heating coil 11A and the second heating coil 11B.

[0045] Furthermore, the control unit 30 creates information about the object to be heated based on the temperature information and the position information. Specifically, the control unit 30 creates information about the object to be heated based on the heating state of the object to be heated calculated based on the temperature information and the position information. For example, the information about the object to be heated includes information indicating whether the object to be heated is in an abnormal state or information for improving the abnormal state.

[0046] The control unit 30 determines whether the object to be heated is in an abnormal state based on the heating state of the object to be heated calculated based on the temperature information and position information. For example, the control unit 30 determines whether the object to be heated is misaligned or abnormally heated based on the heating state of the object to be heated. Misalignment of the object to be heated means that the object to be heated is not positioned at the center of the heating area that is induction heated by the heating coil 10. Abnormal heat generation means that the object to be heated is unintentionally heated locally, resulting in a higher temperature than other parts.

[0047] Furthermore, when the control unit 30 determines that the object to be heated is in an abnormal state, it creates improvement information for improving the abnormal state. For example, the control unit 30 creates information for improving the positional deviation or abnormal heat generation of the object to be heated as the improvement information.

[0048] The control unit 30 transmits information about the object to be heated, that is, information about the abnormal state and / or information about the improvement, to the information output unit 32.

[0049] [Position sensor] The position sensor 31 acquires position information of the first temperature sensor 21. The position information of the first temperature sensor 21 is information that indicates the position of the first temperature sensor 21 within the region S1 in a plan view. For example, the position sensor 31 detects the rotation angle of the heating coil 10 and / or the position of the first temperature sensor 21 within the gap SP1. For example, the position sensor 31 may be an encoder. The encoder may be, for example, an infrared sensor.

[0050] The position information acquired by the position sensor 31 is transmitted to the control unit 30.

[0051] [Information output section] The information output unit 32 outputs information about the object to be heated. The information output unit 32 can be realized by, for example, a display, a speaker, an LED, etc. The information output unit 32 is controlled by the control unit 30.

[0052] The information output unit 32 receives information about the object to be heated from the control unit 30 and outputs the received information.

[0053] When the information output unit 32 receives information about an abnormal state as information about the object to be heated from the control unit 30, the information output unit 32 may output a warning message such as "The pot is not placed in the correct position" or "The pot is overheating" from the display and / or speaker. Alternatively, the information output unit 32 may output a warning sound from the speaker, or may output a warning light such as red or yellow from an LED.

[0054] When the information output unit 32 receives improvement information from the control unit 30 as information regarding the object to be heated, it may output an improvement message such as "Please place the pot in the center," "Please replace the pot," or "Do not heat empty, but add ingredients" from the display and / or speaker.

[0055] In this way, the information output unit 32 can output information relating to the object to be heated as display information on a display, audio information through a speaker, or light information through an LED.

[0056] [Example of coil unit operation] An example of the operation of the coil unit 1, that is, an example of the change in the position of the first temperature sensor 21, will be described with reference to FIGS. 4A to 4G.

[0057] 4A to 4G are schematic plan views showing an example of the operation of the coil unit 1.

[0058] 4A shows a state in which the heating coil 10 is rotated approximately 45 degrees in a first rotation direction DR11 in a plan view. The first rotation direction DR11 is a counterclockwise direction in a plan view. As shown in FIG. 4A, the heating coil 10 rotates in the first rotation direction DR11. As a result, the first infrared sensor 21A and the second infrared sensor 21B of the first temperature sensor 21 move in the first rotation direction DR11.

[0059] While the heating coil 10 is rotating in the first rotation direction DR11, the first infrared sensor 21A and the second infrared sensor 21B move within the gap SP1 toward the outer periphery of the heating coil 10. That is, the first infrared sensor 21A and the second infrared sensor 21B move in directions away from each other within the gap SP1.

[0060] The second temperature sensor 22 is disposed at the center of rotation of the heating coil 10. Therefore, the second temperature sensor 22 does not move.

[0061] 4B shows a state in which the heating coil 10 has rotated approximately 90 degrees in the first rotation direction DR11 in a plan view. As the heating coil 10 further rotates in the first rotation direction DR11, the first infrared sensor 21A and the second infrared sensor 21B also move in the first rotation direction DR11 as shown in FIG.

[0062] While the heating coil 10 is rotating in the first rotation direction DR11, the first infrared sensor 21A and the second infrared sensor 21B move to the outer periphery of the heating coil 10 within the gap SP1, change direction, and move toward the rotation center of the heating coil 10. That is, the first infrared sensor 21A and the second infrared sensor 21B change direction and move within the gap SP1 from a direction moving away from each other to a direction moving toward each other.

[0063] 4C shows a state in which the heating coil 10 has rotated approximately 135 degrees in the first rotation direction DR11 in a plan view. As the heating coil 10 further rotates in the first rotation direction DR11, the first infrared sensor 21A and the second infrared sensor 21B further move in the first rotation direction DR11 as shown in FIG.

[0064] While the heating coil 10 is rotating in the first rotation direction DR11, the first infrared sensor 21A and the second infrared sensor 21B move further within the gap SP1 toward the rotation center of the heating coil 10. The first infrared sensor 21A and the second infrared sensor 21B move to the rotation center of the heating coil 10, change direction, and move toward the outer periphery of the heating coil 10.

[0065] 4D shows a state in which the heating coil 10 has rotated 180 degrees in the first rotation direction DR11 in a plan view. As shown in FIG. 4D, when the heating coil 10 has rotated 180 degrees in the first rotation direction DR11, the rotation direction is changed and the heating coil 10 rotates in the second rotation direction DR12. As a result, the movements of the first infrared sensor 21A and the second infrared sensor 21B also change from the first rotation direction DR11 to the second rotation direction DR12.

[0066] While the heating coil 10 is rotating in the first rotation direction DR11, the first infrared sensor 21A and the second infrared sensor 21B move toward the outer periphery of the heating coil 10 in the gap SP1.

[0067] Fig. 4E shows a state in which the heating coil 10 has rotated approximately 90 degrees in the second rotation direction DR12 in a plan view. As shown in Fig. 4E, as the heating coil 10 further rotates in the second rotation direction DR12, the first infrared sensor 21A and the second infrared sensor 21B further move in the second rotation direction DR12.

[0068] While the heating coil 10 is rotating in the second rotation direction DR12, within the gap SP1, the first infrared sensor 21A and the second infrared sensor 21B move to the outer periphery of the heating coil 10, change direction, and move toward the center of rotation of the heating coil 10.

[0069] 4F shows a state in which the heating coil 10 has rotated approximately 150 degrees in the second rotation direction DR12 in a plan view. As shown in FIG. 4F, as the heating coil 10 further rotates in the second rotation direction DR12, the first infrared sensor 21A and the second infrared sensor 21B further move in the second rotation direction DR12.

[0070] While the heating coil 10 is rotating in the second rotation direction DR12, the first infrared sensor 21A and the second infrared sensor 21B move toward the center of rotation of the heating coil 10 in the gap SP1.

[0071] 4G shows a state in which the heating coil 10 has rotated 180 degrees in the second rotation direction DR12 in a plan view. As shown in FIG. 4G, when the heating coil 10 has rotated 180 degrees in the second rotation direction DR12, the rotation direction is changed and the heating coil 10 rotates in the first rotation direction DR11. As a result, the movements of the first infrared sensor 21A and the second infrared sensor 21B are also changed from the second rotation direction DR12 to the first rotation direction DR11.

[0072] While the heating coil 10 is rotating in the second rotation direction DR12, the first infrared sensor 21A and the second infrared sensor 21B move toward the rotation center of the heating coil 10, change direction, and move toward the outer periphery within the gap SP1.

[0073] In this way, in a plan view, the heating coil 10 switches its rotation direction between the first rotation direction DR11 and the second rotation direction DR12 every time it rotates approximately 180 degrees in a plan view. As a result, the first infrared sensor 21A and the second infrared sensor 21B rotate in the first rotation direction DR11 and the second rotation direction DR12 in conjunction with the rotation of the heating coil 10. Furthermore, the first infrared sensor 21A and the second infrared sensor 21B move back and forth within the gap SP1 in a direction from the center of rotation of the heating coil 10 toward the outer periphery and a direction from the outer periphery of the heating coil 10 toward the center of rotation.

[0074] Furthermore, the positions of the first heating coil 11A and the second heating coil 11B are changed by rotating the heating coil 10 in a first rotation direction DR11 and a second rotation direction DR12 in a plan view. Specifically, the first heating coil 11A and the second heating coil 11B revolve around the rotation center of the heating coil 10 in a plan view as a result of the rotation of the heating coil 10. This makes it possible to change the portion of the heating object that is induction heated by the first heating coil 11A and the second heating coil 11B within the region S1.

[0075] 4 is just an example, and the change in the position of the first temperature sensor 21 is not limited to this. The position of the first temperature sensor 21 may be changed in any pattern.

[0076] [Example of the operation of an induction cooker] An example of the operation of the induction heating cooker 100 according to the first embodiment of the present disclosure will be described with reference to FIG.

[0077] Fig. 5 is a flowchart showing an example of an operation of the induction heating cooker 100 according to the first embodiment of the present disclosure. In the example shown in Fig. 5, an example of an operation in which the induction heating cooker 100 determines an abnormal state of an object to be heated and outputs improvement information for improving the abnormal state will be described.

[0078] The induction heating cooker 100 executes steps ST1 to ST7 shown in FIG. 5 when heating by the heating coil 10 is started or at any timing while heating is being performed.

[0079] In step ST1, control unit 30 controls drive unit 23 to change the position of first temperature sensor 21. As described in the example of the operation of coil unit 1 shown in Figures 4A to 4G, drive unit 23 moves first temperature sensor 21 back and forth linearly within gap SP1 while moving it in rotation direction DR1 of heating coil 10.

[0080] In step ST2, the position sensor 31 detects the position information of the first temperature sensor 21. Specifically, the position sensor 31 detects the position information of the first infrared sensor 21A and the second infrared sensor 21B. The detected position information is transmitted to the control unit 30.

[0081] In step ST3, the first temperature sensor 21 and the second temperature sensor 22 detect temperature information of the object to be heated. The detected temperature information is sent to the control unit 30.

[0082] In step ST4, the control unit 30 calculates the heating state of the object to be heated based on the temperature information of the object to be heated and the position information of the first temperature sensor 21.

[0083] The control unit 30 acquires temperature information of the object to be heated from the first temperature sensor 21 and the second temperature sensor 22, and acquires position information of the first temperature sensor 21 from the position sensor 31. The control unit 30 calculates the heating state of the object to be heated based on the acquired temperature information and position information. For example, the control unit 30 calculates the temperature distribution of the underside of the object to be heated based on the temperature information and position information.

[0084] In step ST5, the control unit 30 determines whether the object to be heated is in an abnormal state based on the heating state of the object to be heated calculated in step ST4. For example, the control unit 30 determines whether the object to be heated is misaligned or generating abnormal heat based on the temperature distribution of the object to be heated.

[0085] If the control unit 30 determines that the object to be heated is in an abnormal state, the flow proceeds to step ST6. If the control unit 30 determines that the object to be heated is not in an abnormal state, the flow ends.

[0086] In step ST6, the control unit 30 creates improvement information for improving the abnormal state. For example, the control unit 30 creates improvement information for improving the positional deviation or abnormal heat generation of the heating object. The control unit 30 transmits the created improvement information to the information output unit 32.

[0087] In step ST7, the information output unit 32 outputs the improvement information.

[0088] The information output unit 32 receives improvement information from the control unit 30 and outputs the received improvement information.

[0089] In this way, the induction heating cooker 100 detects temperature information of the entire lower surface of the object to be heated and calculates the heating state of the object to be heated by changing the position of the first temperature sensor 21 below the top plate 2. Furthermore, when the induction heating cooker 100 determines that the object to be heated is in an abnormal state based on the calculated heating state, it outputs improvement information for improving the abnormal state.

[0090] 5, steps ST6 and ST7 are not essential. For example, the control unit 30 may transmit information about the determined abnormal state to the information output unit 32 without creating improvement information. The information output unit 32 may output information about the abnormal state.

[0091] [Another example of the operation of an induction cooker] Another example of the operation of the induction heating cooker 100 according to the first embodiment of the present disclosure will be described with reference to FIG.

[0092] Fig. 6 is a flowchart showing another example of the operation of the induction heating cooker 100 according to the first embodiment of the present disclosure. In the example shown in Fig. 6, an example of the operation of the induction heating cooker 100 determining the heating state of the object to be heated and controlling the heating coil 10 based on the heating state will be described.

[0093] The induction heating cooker 100 executes steps ST1 to ST4 and ST8 shown in FIG. 6 when heating by the heating coil 10 is started or at any timing while heating is being performed.

[0094] Steps ST1 to ST4 shown in FIG. 6 are the same as steps ST1 to ST4 shown in FIG. 5, and therefore a description thereof will be omitted.

[0095] In step ST8, the control unit 30 controls the heating coil 10 and the driving unit 23 based on the heating state of the object to be heated. Specifically, the control unit 30 controls the driving unit 23, the first heating coil 11A, and the second heating coil 11B based on the heating state of the object to be heated and the heating setting of the induction heating cooker 100. For example, the heating setting of the induction heating cooker 100 includes uniform heating, which uniformly heats the object to be heated, and local heating, which locally heats any part of the object to be heated.

[0096] For example, when the heating setting of the induction heating cooker 100 is uniform heating, the control unit 30 determines whether or not there is uneven heating based on the heating state of the object to be heated calculated based on the temperature information and position information. For example, the control unit 30 identifies areas on the entire underside of the object to be heated that are lower in temperature than other areas based on the temperature distribution on the underside of the object to be heated. Alternatively, the control unit 30 identifies areas on the entire object to be heated that are higher in temperature than other areas.

[0097] Next, the control unit 30 controls the drive unit 23 to rotate the heating coil 10. As a result, the first heating coil 11A is positioned directly below the portion of the object to be heated that has been identified as having a low temperature. The control unit 30 makes the output of the first heating coil 11A greater than the output of the second heating coil 11B. Alternatively, the control unit 30 controls the drive unit 23 to position the first heating coil 11A directly below the portion of the object to be heated that has been identified as having a high temperature. The control unit 30 makes the output of the first heating coil 11A smaller than the output of the second heating coil 11B. This suppresses uneven heating and achieves uniform heating.

[0098] When the heating setting of the induction heating cooker 100 is local heating, the control unit 30 determines whether or not any part of the object to be heated is locally heated based on the temperature information and position information. For example, the control unit 30 identifies any part to be locally heated based on the heating setting of the induction heating cooker 100. The control unit 30 determines whether or not the identified any part has a higher temperature than other parts based on the temperature distribution on the underside of the object to be heated.

[0099] Next, the control unit 30 controls the drive unit 23 to rotate the heating coil 10. This positions the first heating coil 11A directly below the desired portion of the heating object to be locally heated. The control unit 30 sets the output of the first heating coil 11A to be greater than the output of the second heating coil 11B. This makes the desired portion to be locally heated stronger than the other portions, thereby achieving local heating.

[0100] In this way, the control unit 30 calculates the heating state of the object to be heated based on the temperature information and position information, and controls the output of the drive unit 23 and the multiple heating coils 11A, 11B based on the calculated heating state and heating settings, thereby achieving uniform heating or localized heating.

[0101] The heating settings of the induction heating cooker 100 are not limited to uniform heating and local heating. For example, the heating settings of the induction heating cooker 100 may include a setting in which a high-temperature portion and a low-temperature portion are provided for one heating object and heating is performed by adjusting the heating power of the two portions. Even in this case, the setting in which heating is performed by adjusting the heating power of the two portions may be achieved by adjusting the positions and outputs of the first heating coil 11A and the second heating coil 11B.

[0102] [effect] According to the induction heating cooker 100 according to the first embodiment, the following effects can be achieved.

[0103] The induction heating cooker 100 includes a top plate 2, a heating coil 10, a first temperature sensor 21, and a drive unit 23. An object to be heated is placed on the top plate 2. The heating coil 10 is disposed below the top plate 2 and induction heats the object to be heated. The first temperature sensor 21 is disposed below the top plate 2 and detects temperature information of the object to be heated. The drive unit 23 changes the position of the first temperature sensor 21 when viewed in the thickness direction (Z-axis direction) of the top plate 2.

[0104] This configuration can improve the detection range of the temperature sensor 21. According to the induction heating cooker 100, the first temperature sensor 21 that detects temperature information of the object to be heated has a movable configuration below the top plate 2. This allows the first temperature sensor 21 to detect temperature information of the entire lower surface of the object to be heated while moving. As a result, the detection range of the first temperature sensor 21 can be improved.

[0105] Furthermore, by improving the detection range of the first temperature sensor 21, the heating state of the object to be heated can be accurately known.

[0106] The driving unit 23 moves the first temperature sensor 21. Specifically, the driving unit 23 moves the first temperature sensor 21 back and forth when viewed in the thickness direction (Z-axis direction) of the top plate 2. With this configuration, the first temperature sensor 21 itself can be moved, and the detection range of the first temperature sensor 21 can be further improved.

[0107] The driving unit 23 rotates the heating coil 10 when viewed from the thickness direction (Z-axis direction) of the top plate 2, and the first temperature sensor 21 moves in the rotation direction DR1 of the heating coil 10 due to the rotation of the heating coil 10. With this configuration, the first temperature sensor 21 can be moved in the rotation direction DR1, and the detection range of the first temperature sensor 21 can be further improved.

[0108] The first temperature sensor 21 includes infrared sensors 21A and 21B. With this configuration, the first temperature sensor 21 can detect temperature information of the heating object in a non-contact manner. Furthermore, since the detection speed of the temperature information can be improved, more accurate temperature information can be detected quickly.

[0109] The induction heating cooker 100 is provided with a contact-type second temperature sensor 22 that is disposed on the underside of the top plate 2 and detects temperature information of the object to be heated. With this configuration, temperature information of the object to be heated can be detected not only by the first temperature sensor 21 but also by the second temperature sensor 22. As a result, the detection range of the temperature sensors 21 and 22 can be improved.

[0110] The heating coil 10 includes a first heating coil 11A and a second heating coil 11B disposed with a gap SP1 between them. The first temperature sensor 21 is disposed in the gap SP1 between the first heating coil 11A and the second heating coil 11B. This configuration makes it possible to effectively utilize the gap SP1 between the first heating coil 11A and the second heating coil 11B, and to movably dispose the first temperature sensor 21 within the heating coil 10. As a result, the coil unit 1 including the heating coil 10 and the first temperature sensor 21 can be made smaller.

[0111] The induction heating cooker 100 includes a position sensor 31 that detects position information of the first temperature sensor 21. With this configuration, the position information of the first temperature sensor 21 can be easily detected.

[0112] The induction heating cooker 100 includes a control unit 30 that controls the heating coil 10 and a drive unit 23. The heating coil 10 includes multiple heating coils 11A and 11B. The induction heating cooker 100 acquires temperature information detected by a first temperature sensor 21 and position information detected by a position sensor 31, and controls the drive unit 23 and the multiple heating coils 11A and 11B based on the acquired temperature information and position information. This configuration allows the heating object to be heated efficiently. For example, when the heating object is to be heated evenly, the positions and outputs of the multiple heating coils 11A and 11B can be adjusted to reduce uneven heating. Furthermore, when the heating object is to be locally heated, the positions and outputs of the multiple heating coils 11A and 11B can be adjusted to increase the temperature of any desired locally heated portion.

[0113] The induction cooking appliance 100 includes an information output unit 32 that outputs information about the object to be heated and a control unit 30 that controls the information output unit 32. The control unit 30 acquires temperature information detected by the first temperature sensor 21 and position information detected by the position sensor 31, and generates information about the object to be heated based on the temperature information and position information. The control unit 30 also transmits the information about the object to be heated to the information output unit 32. This configuration allows the control unit 30 to accurately determine information about the object to be heated and notify the user of the information about the object to be heated. For example, if the heating setting is set to even heating and the object to be heated is being heated as set, the information output unit 32 may output a message such as "The pot is being heated evenly," allowing the user to know the heating status of the object to be heated. Alternatively, the control unit 30 may graphically display a thermographic image based on information about the object to be heated on the display unit. This allows the user to determine whether the uneven temperature is due to the ingredients, the shape of the pot bottom, or a rise in the pot.

[0114] Based on the temperature information and the position information, the control unit 30 determines an abnormal state, including at least one of misalignment or abnormal heat generation of the heating object, and transmits information about the abnormal state to the information output unit 32. The information output unit 32 outputs information about the abnormal state. This configuration allows the control unit 30 to accurately determine an abnormal state of the heating object, and the user can be notified that the heating object is in an abnormal state. For example, the information output unit 32 can output a warning message such as "The pot is not placed in the correct position" or "The pot is generating abnormal heat," allowing the user to be notified of the specific state of the heating object.

[0115] The control unit 30 determines an abnormal state, including at least one of misalignment or abnormal heat generation of the heating object, based on the temperature information and position information. The control unit 30 creates improvement information for improving the abnormal state based on the abnormal state and transmits the improvement information to the information output unit 32. The information output unit 32 outputs the improvement information. This configuration allows the control unit 30 to accurately determine whether the heating object is in an abnormal state and output improvement information for improving the abnormal state to the user. This allows the user to easily learn how to improve the abnormal state. For example, the information output unit 32 outputs improvement messages such as "Place the pot in the center," "Replace the pot," or "Do not heat the pot empty; add ingredients," allowing the user to learn specific actions to improve the abnormal state.

[0116] In the present embodiment, the heating coil 10 is configured by two heating coils 11A and 11B, but is not limited to this. For example, the heating coil 10 may be configured by one or more heating coils.

[0117] When the heating coil 10 is configured as a single heating coil, a gap in which the first temperature sensor 21 is movably disposed may be provided between the coil wires that configure the heating coil.

[0118] In the present embodiment, the first heating coil 11A and the second heating coil 11B have a D-shape in plan view, but are not limited thereto. For example, the first heating coil 11A and the second heating coil 11B may have a circular, elliptical, triangular, or sector shape in plan view.

[0119] In the present embodiment, an example has been described in which the first temperature sensor 21 includes two infrared sensors 21A and 21B, but this is not limiting. For example, the first temperature sensor 21 may include one or more infrared sensors. Preferably, the first temperature sensor 21 may include two to six infrared sensors. More preferably, the first temperature sensor 21 may include two to three infrared sensors.

[0120] Furthermore, the first temperature sensor 21 is not limited to the infrared sensors 21A and 21B. The first temperature sensor 21 may be any temperature sensor that can detect temperature information of an object to be heated. For example, the first temperature sensor 21 may be a non-contact temperature sensor other than an infrared sensor.

[0121] In the present embodiment, an example has been described in which the induction heating cooker 100 includes the second temperature sensor 22, but the present invention is not limited to this. The second temperature sensor 22 does not have to be an essential component. Furthermore, the second temperature sensor 22 is not limited to a thermistor or a thermocouple, and may be any temperature sensor that can detect temperature information of an object to be heated. For example, the second temperature sensor 22 may be a contact-type temperature sensor such as an infrared sensor. Furthermore, the number of second temperature sensors 22 may be one or more.

[0122] In the present embodiment, an example has been described in which the drive unit 23 includes a first drive mechanism that rotates the heating coil 10 and a second drive mechanism that reciprocates the first temperature sensor 21, but the present invention is not limited to this. For example, the drive unit 23 may include at least one of the first drive mechanism or the second drive mechanism.

[0123] The driving unit 23 may be configured to change the position of the first temperature sensor 21 as viewed in the thickness direction (Z-axis direction) of the top plate 2. For example, the change in the position of the first temperature sensor 21 may be achieved by at least one of movement in the rotation direction DR1 due to rotation of the heating coil 10, or linear reciprocating movement of the heating coil 10 within the gap SP1.

[0124] In the present embodiment, an example has been described in which the induction heating cooker 100 includes the position sensor 31, but the present invention is not limited to this. The position sensor 31 does not have to be an essential component. For example, when the first temperature sensor 21 moves along a preset route, the control unit 30 may estimate the position of the first temperature sensor 21 based on the elapsed time since the first temperature sensor 21 started to move.

[0125] In the present embodiment, an example has been described in which the induction heating cooker 100 includes the information output unit 32, but the present invention is not limited to this. The information output unit 32 does not have to be an essential component. For example, the information output unit 32 may be a mobile terminal such as a smartphone. The control unit 30 may control the information output unit 32 via wireless communication or wired communication.

[0126] In the present embodiment, the information about the object to be heated includes information about an abnormal state of the object to be heated or information for improving the abnormal state, but is not limited to this. For example, the information about the object to be heated may include information indicating the heating state of the object to be heated, such as information indicating whether the object is being heated normally according to the heating setting. For example, if the control unit 30 determines that the object to be heated is being heated according to the heating setting, such as even heating or localized heating, the control unit 30 may cause the information output unit 32 to output a message indicating the heating state, such as "Even heating" or "Increasing the heat in the center of the pot."

[0127] In the present embodiment, an example has been described in which the control unit 30 calculates the temperature distribution of the underside of the object to be heated as the heating state of the object to be heated based on the temperature information and position information in step S4, but the invention is not limited to this. The heating state of the object to be heated may be any information that can determine the state in which the object to be heated is being heated.

[0128] The following describes modified examples.

[0129] (Variation 1) Fig. 7 is a schematic plan view of a coil unit 1A of Modification 1. As shown in Fig. 7, in the coil unit 1A, a heating coil 10A may be composed of an inner coil 12A and an outer coil 12B. In Modification 1, the inner coil 12A and the outer coil 12B are connected by a conductor 12C to form a single heating coil 10A.

[0130] The inner coil 12A is a coil wound a plurality of times in a circular shape in a plan view. A second temperature sensor 22 is disposed inside the inner coil 12A.

[0131] The outer coil 12B is a coil wound multiple times in a circular shape in a plan view. The inner diameter of the outer coil 12B is larger than the outer diameter of the inner coil 12A. That is, the outer coil 12B is arranged outside the inner coil 12A with a gap therebetween. The inner coil 12A and the outer coil 12B are arranged concentrically. As a result, an annular gap SP2 is formed between the inner coil 12A and the outer coil 12B in a plan view.

[0132] The first temperature sensor 21 is disposed in the gap SP2 between the inner coil 12A and the outer coil 12B and is configured to be movable within the gap SP2. Specifically, the first temperature sensor 21 includes a first infrared sensor 21C and a second infrared sensor 21D disposed within the gap SP2.

[0133] The first infrared sensor 21C and the second infrared sensor 21D rotate around the centers of the inner coil 12A and the outer coil 12B as the rotation axis in a plan view. For example, the first infrared sensor 21C and the second infrared sensor 21D change their rotation direction each time they rotate approximately 180 degrees as viewed in a plan view. That is, the drive unit 23 moves the first infrared sensor 21C and the second infrared sensor 21D back and forth so as to rotate around the centers of the inner coil 12A and the outer coil 12B as the rotation axis in a plan view. Note that the drive unit 23 does not necessarily rotate the heating coil 10A.

[0134] Even with this configuration, the detection range of the first temperature sensor 21 can be improved.

[0135] The inner coil 12A and the outer coil 12B do not have to be connected by the conductor 12C. In this case, the inner coil 12A and the outer coil 12B may be controlled by the control unit 30 separately.

[0136] (Variation 2) 8 is a schematic plan view of a coil unit 1B of Modification 2. As shown in FIG. 8, in the coil unit 1B, a heating coil 10B includes a plurality of coil pieces 13.

[0137] Specifically, in a plan view, a first heating region S10 and a second heating region S20 are provided to heat an object to be heated. The first heating region S10 is a region heated by a plurality of coil pieces 13 and has a circular shape in a plan view. The second heating region S20 is also a region heated by a plurality of coil pieces 13 and has a circular shape in a plan view. In the second modification, the first heating region S10 and the second heating region S20 have substantially the same shape. In a plan view, the first heating region S10 and the second heating region S20 partially overlap each other.

[0138] In Modification 2, the first heating region S10 and the second heating region S20 are arranged adjacent to each other in the Y-axis direction. The centers of the first heating region S10 and the second heating region S20 are arranged on the same line.

[0139] Coil piece 13 has, for example, a fan shape in a plan view, and is configured by winding a coil wire multiple times inside coil piece 13.

[0140] Within the first heating region S10, the coil pieces 13 are radially arranged at equal intervals. Specifically, in a plan view, the arc portions of the coil pieces 13 are arranged along an outline line L1 that defines the first heating region S10.

[0141] In the first heating region S10, the multiple coil pieces 13 are arranged with a first gap SP11 between them.

[0142] Furthermore, in a portion of the second heating region S20 that does not overlap with the first heating region S10, the multiple coil pieces 13 are arranged at equal intervals. Specifically, in a portion of the second heating region S20 that does not overlap with the first heating region S10, the arc portions of each of the multiple coil pieces 13 are arranged along an outline line L2 that defines the second heating region S20 in a plan view.

[0143] In the portion of the second heating region S20 that does not overlap with the first heating region S10, the multiple coil pieces 13 are arranged with a second gap SP12 between them.

[0144] In plan view, the first gap SP11 and the second gap SP12 are in communication with each other. Specifically, in plan view, the first gap SP11 and the second gap SP12 are in communication with each other in the direction in which the first heating region S10 and the second heating region S20 are adjacent to each other (the Y-axis direction). Specifically, the first gap SP11 and the second gap SP12 are provided along a center line CL1 that passes through the center C1 of the first heating region S10 and the center C2 of the second heating region S20. As a result, the first gap SP11 and the second gap SP12 are in communication with each other in a linear manner. In the second modification, the first gap SP11 and the second gap SP12 have the same width.

[0145] The first temperature sensor 21 is disposed in a first gap SP11 in the overlapping portion of the first heating region S10 and the second heating region S20, and is configured to be movable within the first gap SP11. Furthermore, the first temperature sensor 21 may be movable to the first gap SP11 at the center of the first heating region S10 or a position closer to the center. Furthermore, the first temperature sensor 21 may be movable to the second gap SP12 at the center of the second heating region S20 or a position closer to the center.

[0146] The first temperature sensor 21 moves back and forth in the Y-axis direction within a first gap SP11 in at least the overlapping portion of the first heating region S10 and the second heating region S20.

[0147] The second temperature sensor 22 is disposed in the first gap SP11 and the second gap SP12. In Modification 2, two second temperature sensors 22 are disposed in the first gap SP11 and the second gap SP12. The first temperature sensor 21 moves back and forth between the two second temperature sensors 22.

[0148] In the heating coil 10B configured with such a plurality of coil pieces 13, the detection range of the first temperature sensor 21 can also be improved.

[0149] The first temperature sensor 21 is not limited to reciprocating in the direction (Y-axis direction) in which the first heating region S10 and the second heating region S20 are adjacent to each other. For example, the first temperature sensor 21 may move within the first gap SP11 and the second gap SP12 formed in a direction intersecting the Y-axis direction or the X-axis direction.

[0150] Furthermore, the first heating region S10 and the second heating region S20 are not limited to being circular in plan view, and may be, for example, elliptical or polygonal. Alternatively, the second heating region may be sector-shaped in plan view, excluding the portion overlapping with the first heating region S10.

[0151] Furthermore, the multiple coil pieces 13 arranged in the first heating region S10 and the second heating region S20 may have different shapes and / or sizes. In the coil unit 1B of Modification 2, when a user uses a large pot, the first heating region S10 and the second heating region S20 can be combined and used as a single heating region. Because the first temperature sensor 21 detects temperature while moving back and forth in the Y-axis direction within one heating region, it is possible to detect temperature over a wide range even if the heating region is large. Alternatively, it is possible to use either the first heating region S10 or the second heating region S20. In this case, the temperature can be detected efficiently by moving the first temperature sensor 21 back and forth within the heating region to be used.

[0152] (Variation 3) Fig. 9A is a schematic plan view of an induction heating cooker 100A of Modification 3. Fig. 9B is a schematic view showing the operation of the first temperature sensor 21 of Modification 3. As shown in Fig. 9A and Fig. 9B, the induction heating cooker 100A has a plurality of heating coils 10C, each having an elliptical shape in a plan view, arranged at intervals.

[0153] A first temperature sensor 21 is movably disposed between the plurality of heating coils 10C. For example, the first temperature sensor 21 moves intermittently between the plurality of heating coils 10C in a plan view. The first temperature sensor 21 can move in any pattern between the plurality of heating coils 10C. In the third modification, the first temperature sensor 21 moves back and forth in the X-axis direction in a plan view.

[0154] A second temperature sensor 22 is disposed at the center of each of the heating coils 10C in plan view.

[0155] Even in such a configuration, the detection range of the first temperature sensor 21 can be improved with a small number of sensors, thereby reducing the number of first temperature sensors 21 and the manufacturing cost.

[0156] As described above, the above embodiment has been described as an example of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made as appropriate.

[0157] Although the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art, and such changes and modifications are to be understood as being included within the scope of the present disclosure as defined by the appended claims unless they depart therefrom.

[0158] (Outline of the embodiment) (1) The induction heating cooker of the present disclosure includes a top plate on which an object to be heated is placed, a heating coil arranged below the top plate for induction heating the object to be heated, a temperature sensor arranged below the top plate for detecting temperature information of the object to be heated, and a drive unit for changing the position of the temperature sensor when viewed in the thickness direction of the top plate.

[0159] (2) In the induction heating cooker of (1), the driving unit may move the temperature sensor.

[0160] (3) In the induction heating cooker of (2), the drive unit may reciprocate the temperature sensor when viewed in the thickness direction of the top plate.

[0161] (4) In the induction cooking device of any one of (1) to (3), the drive unit may rotate the heating coil when viewed in the thickness direction of the top plate, and the temperature sensor may move in the rotation direction of the heating coil due to the rotation of the heating coil.

[0162] (5) In the induction cooking device according to any one of (1) to (4), the temperature sensor may include an infrared sensor.

[0163] (6) The induction cooking device according to any one of (1) to (5) may further include a contact-type temperature sensor disposed on the underside of the top plate for detecting temperature information of the object to be heated.

[0164] (7) In any of the induction heating cookers (1) to (6), the heating coil may include a first heating coil and a second heating coil arranged with a gap between them, and the temperature sensor may be arranged in the gap between the first heating coil and the second heating coil.

[0165] (8) In any one of the induction heating cookers (1) to (7), a position sensor may be further provided to detect position information of the temperature sensor.

[0166] (9) The induction heating cooker of (8) further includes a control unit that controls the heating coil and the drive unit, and the heating coil includes multiple heating coils. The control unit may acquire temperature information detected by the temperature sensor and position information detected by the position sensor, and control the drive unit and the multiple heating coils based on the acquired temperature information and position information.

[0167] (10) The induction heating cooker of (8) may further include an information output unit that outputs information about the object to be heated, and a control unit that controls the information output unit, and the control unit may acquire temperature information detected by the temperature sensor and position information detected by the position sensor, create information about the object to be heated based on the temperature information and the position information, and transmit the information about the object to be heated to the information output unit.

[0168] (11) In the induction heating cooker of (10), the control unit may determine an abnormal state including at least one of a positional deviation or abnormal heat generation of the object to be heated based on the temperature information and the position information, and transmit information regarding the abnormal state to the information output unit, and the information output unit may output information regarding the abnormal state.

[0169] (12) In the induction heating cooker of (10), the control unit may determine an abnormal condition including at least one of misalignment of the object to be heated or abnormal heat generation based on the temperature information and the position information, create improvement information for improving the abnormal condition based on the abnormal condition, and send the improvement information to the information output unit, and the information output unit may output the improvement information.

[0170] (13) In the induction heating cooker of (1), the heating coil may include a plurality of coil pieces arranged with gaps between them when viewed in the thickness direction of the top plate, the temperature sensor may be arranged in the gaps between the plurality of coil pieces, and the drive unit may move the temperature sensor within the gaps between the plurality of coil pieces. [Industrial Applicability]

[0171] The induction heating cooker of the present disclosure is applicable to a cooking device that induction heats an object to be heated. [Explanation of symbols]

[0172] 1, 1A, 1B coil unit 2 top plate 3. Housing 10, 10A, 10B, 10C heating coil 11A First heating coil 11B Second heating coil 12 Heating coil 13 Coil piece 21 Temperature sensor (first temperature sensor) 21A, 21B, 21C, 21D Infrared sensors 22 Temperature sensor (second temperature sensor) 23 Drive unit 30 Control Unit 31 Position Sensor 32 Information output section 100,100A induction cooker

Claims

1. a top plate on which an object to be heated is placed; a heating coil disposed below the top plate and configured to induction heat the object to be heated; a first temperature sensor disposed below the top plate and configured to detect temperature information of the object to be heated; a drive unit that changes the position of the first temperature sensor when viewed in a thickness direction of the top plate; Equipped with the driving unit rotates the heating coil when viewed in a thickness direction of the top plate, the first temperature sensor moves in the rotation direction of the heating coil due to the rotation of the heating coil; Induction heating cooker.

2. a top plate on which an object to be heated is placed; a heating coil disposed below the top plate and configured to induction heat the object to be heated; a temperature sensor disposed below the top plate and configured to detect temperature information of the object to be heated; a driving unit that changes the position of the temperature sensor when viewed in a thickness direction of the top plate; Equipped with the temperature sensor includes a first temperature sensor and a second temperature sensor; the second temperature sensor is fixed so as not to move in a region where the heating coil is disposed; the first temperature sensor is configured to be movable so that an area in which the heating coil is disposed approaches and moves away relatively from the second temperature sensor; Induction heating cooker.

3. The driving unit moves the first temperature sensor.

3. The induction heating cooker according to claim 1 or 2.

4. the drive unit reciprocates the first temperature sensor when viewed in a thickness direction of the top plate. The induction heating cooker according to claim 3.

5. the driving unit rotates the heating coil when viewed in a thickness direction of the top plate, the first temperature sensor moves in the rotation direction of the heating coil due to the rotation of the heating coil; The induction heating cooker according to claim 2.

6. the first temperature sensor includes an infrared sensor; 3. The induction heating cooker according to claim 1 or 2.

7. a second contact temperature sensor disposed on the lower surface of the top plate and configured to detect temperature information of the object to be heated; The induction heating cooker according to claim 1 .

8. the heating coil includes a first heating coil and a second heating coil arranged with a gap between the first heating coil and the second heating coil; the first temperature sensor is disposed in the gap between the first heating coil and the second heating coil; 3. The induction heating cooker according to claim 1 or 2.

9. further comprising a position sensor that detects position information of the first temperature sensor; 3. The induction heating cooker according to claim 1 or 2.

10. Further, a control unit is provided to control the heating coil and the driving unit. the heating coil includes a plurality of heating coils; The control unit acquiring the temperature information detected by the first temperature sensor and the position information detected by the position sensor; controlling the driving unit and the plurality of heating coils based on the acquired temperature information and position information; The induction heating cooker according to claim 9.

11. an information output unit that outputs information about the object to be heated; a control unit that controls the information output unit; Further provided with The control unit acquiring the temperature information detected by the first temperature sensor and the position information detected by the position sensor; creating information about the object to be heated based on the temperature information and the position information; transmitting information about the object to be heated to the information output unit; The induction heating cooker according to claim 9.

12. The control unit determining an abnormal state including at least one of a positional deviation or abnormal heat generation of the object to be heated based on the temperature information and the position information; transmitting information about the abnormal state to the information output unit; the information output unit outputs information about the abnormal state. The induction heating cooker according to claim 11.

13. The control unit determining an abnormal state including at least one of a positional deviation or abnormal heat generation of the object to be heated based on the temperature information and the position information; creating improvement information for improving the abnormal state based on the abnormal state; transmitting the improvement information to the information output unit; the information output unit outputs the improvement information. The induction heating cooker according to claim 11.

14. the heating coil includes a plurality of coil pieces that are arranged with gaps between them when viewed in a thickness direction of the top plate, the first temperature sensor is disposed in the gap between the plurality of coil pieces; the drive unit moves the first temperature sensor within the gaps between the plurality of coil pieces.

3. The induction heating cooker according to claim 1 or 2.

Images