JP2024117319A - Induction Cooker - Google Patents

Abstract

A light-emitting element is efficiently arranged while indicating an appropriate position for heating an object to be heated.
[Solution] The device comprises a top plate, a first heating coil unit 60, an inverter circuit, a plurality of light-emitting elements arranged near the first heating coil unit 60, and a control unit. The first heating coil unit 60 has a first heating coil and a second heating coil adjacent to the first heating coil and driven in common with part of the first heating coil, with the common part between the first heating coil and the second heating coil being an overlapping part. The plurality of light-emitting elements include a first light-emitting element 90A arranged on the outside in the width direction of the part of the first heating coil excluding the overlapping part, a second light-emitting element 90B arranged on the outside in the width direction of the part of the second heating coil excluding the overlapping part, and a third light-emitting element 90C arranged on the outside in the width direction of the overlapping part.
[Selected figure] Figure 2

Description

This disclosure relates to an induction heating cooker.

Patent document 1 discloses a cooking device equipped with a roughly ring-shaped light emitter that is placed on the underside of a top plate.

In the cooking device described in Patent Document 1, the light emitters are arranged around the induction heating coil and indicate the position of the induction heating coil with light. The light emitters are illuminated with reduced brightness when heating is stopped, and illuminated with increased brightness when heating starts.

Patent document 2 discloses a cooking device that arranges multiple elliptical coils and heats a pot with some of the elliptical coils depending on the shape of the pot.

JP 2013-002648 A International Publication No. 2016/181653

However, the cooking device described in Patent Document 1 still has room for improvement in terms of efficient arrangement of the light emitters.

For example, when using multiple coils as in the cooking device described in Patent Document 2, if a ring-shaped light emitter as described in Patent Document 1 is placed on each coil, the mechanism and arrangement will become complicated, the number of parts will increase, or some of the light emitters will overlap, resulting in inefficiencies.

Therefore, the objective of this disclosure is to efficiently arrange light emitters.

An induction heating cooker according to one embodiment of the present disclosure includes a top plate, a first heating coil unit disposed below the top plate and inductively heating an object to be heated placed on the top plate, an inverter circuit that supplies high-frequency current to the first heating coil unit, a plurality of light-emitting elements disposed near the first heating coil unit, and a control unit that controls the inverter circuit and the plurality of light-emitting elements. The first heating coil unit has a first heating coil and a second heating coil adjacent to the first heating coil and driven in common with a part of the first heating coil, and the common part of the first heating coil and the second heating coil is an overlapping part, and the multiple light-emitting parts have a first light-emitting part provided on the outside in the width direction of the part of the first heating coil excluding the overlapping part in the direction from the first heating coil to the second heating coil, a second light-emitting part provided on the outside in the width direction of the part of the second heating coil excluding the overlapping part, and a third light-emitting part provided on the outside in the width direction of the overlapping part.

According to the present disclosure, light-emitting bodies can be efficiently arranged while indicating appropriate positions for heating an object to be heated.

1 is a schematic perspective view of an induction heating cooker according to a first embodiment of the present disclosure; 1 is a schematic top view of an induction heating cooker according to a first embodiment of the present disclosure; FIG. 2 is a schematic top view showing a heating coil unit in the induction heating cooker according to the first embodiment of the present disclosure. 1 is a schematic top view of the induction heating cooker according to the first embodiment of the present disclosure with a top plate removed; FIG. FIG. 2 is a control block diagram showing a main control configuration of the induction heating cooker according to the first embodiment of the present disclosure. 5A, 5B, and 5C are diagrams showing heatable areas in each heating state of the induction heating cooker of the first embodiment of the present disclosure. FIG. 5A, 5B, and 5C are diagrams illustrating the transition of an operation display unit in the induction heating cooker according to the first embodiment of the present disclosure. 13A, 13B, 13C, and 13D are diagrams illustrating the transition of the operation display unit in the induction heating cooker according to the first embodiment of the present disclosure. 5A, 5B, and 5C are diagrams illustrating the transition of an operation display unit in an example of an induction heating cooker according to the first embodiment of the present disclosure. 5A to 5C are diagrams illustrating displays on an operation display unit in the induction heating cooker according to the first embodiment of the present disclosure. 5A and 5B are diagrams illustrating the transition of an operation display unit in the induction heating cooker according to the first embodiment of the present disclosure. 5A to 5C are diagrams illustrating displays on an operation display unit in the induction heating cooker according to the first embodiment of the present disclosure.

(Background to this disclosure)
The heating coil generally has a circular shape as shown in Patent Document 1. However, in recent years, so-called flex coils, which combine multiple heating coils so that pots of various sizes can be used and pots can be moved, as shown in Patent Document 2, have also become known.

Furthermore, the induction heating cooker shown in FIG. 3 has a heating coil unit in which a circular first heating coil and a second heating coil are arranged so as to partially overlap. The first heating coil is formed by combining six sector-shaped coil pieces. The second heating coil is also formed by combining six sector-shaped coil pieces. Two pieces of the first heating coil and the second heating coil overlap.

In such an induction heating cooker, if the ring-shaped light emitter described in Patent Document 1 is applied to each of the first heating coil and the second heating coil, overlapping portions are generated, which is inefficient. Alternatively, if a light emitter is applied to each coil piece, the number of parts increases, which is inefficient.

As mentioned above, the more complex the structure of the heating coil unit, the more room there is for improvement in efficiently arranging the light-emitting elements.

Therefore, the inventors discovered a configuration that efficiently positions the light emitters while indicating the appropriate position of the object to be heated, leading to the following invention.

Hereinafter, an embodiment of the present disclosure will be described with reference to the accompanying drawings. Note that the following description is merely illustrative in nature and is not intended to limit the present disclosure, its application, or its uses. Furthermore, the drawings are schematic, and the ratios of dimensions do not necessarily correspond to the real ones.

It should be noted that, in this specification, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as expressing or implying a relative importance or ranking of technical features. Features qualified as "first" and "second" expressly or imply the inclusion of one or more of that feature.
(Embodiment 1)
1. Configuration Hereinafter, a configuration of an induction heating cooker 1 according to a first embodiment of the present disclosure will be described.
1-1. Overall configuration The overall configuration of the induction heating cooker 1 of the first embodiment according to the present disclosure will be described with reference to Figures 1 to 4. Note that the X-Y-Z coordinate system shown in the figures is for aiding in understanding the invention and does not limit the invention. The X-axis direction and the Y-axis direction indicate the horizontal direction, and the Z-axis direction indicates the vertical direction. In the first embodiment, the X-axis direction is the left-right direction, the Y-axis direction is the front-back direction, and the Z-axis direction is the up-down direction.

As shown in FIG. 1, the induction heating cooker 1 is a cooker that inductively heats a cooking container that contains an object to be cooked. 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.

The induction cooking device 1 comprises a top unit 10 and a main unit 50 attached below the top unit 10.

As shown in FIG. 2, the top unit 10 has a top plate 11 and a first operation display unit 20, a second operation display unit 30, and a third operation display unit 40 arranged on the front side of the top plate 11.

As shown in Figures 1, 3 and 4, the main unit 50 has a housing 51 attached to the underside of the top plate 11, a grill chamber 52 arranged inside the housing 51, a grill operation unit 53, a first heating coil unit 60, a second heating coil unit 70, a fifth heating coil 80, and a first light-emitting unit 90A to a seventh light-emitting unit 90G. The grill chamber 52 is configured so that the interior of the chamber is heated by a grill coil 100 and a grill heater 101, which will be described later. The grill operation unit 53 is stored next to the grill chamber 52.

The first heating coil unit 60 and the second heating coil unit 70 are arranged side by side in the X-axis direction. The fifth heating coil 80 is arranged in the gap between the first heating coil unit 60 and the second heating coil unit 70.

The first heating coil unit 60 includes a first heating coil 61 and a second heating coil 62, as described below. The second heating coil unit 70 includes a third heating coil 71 and a fourth heating coil 72, as described below.

The first operation display unit 20 is used to receive operations of the first heating coil unit 60 and display the control status. The first operation display unit 20 is disposed in front of the first heating coil unit 60.

The second operation display unit 30 is used to display a control state by receiving an operation of the second heating coil unit 70. The second operation display unit 30 is disposed in front of the second heating coil unit 70.

The third operation display unit 40 is used to receive operations of the fifth heating coil 80 and display the control status. The third operation display unit 40 is disposed in front of the fifth heating coil 80.

The main unit 50 is equipped with an inverter circuit 110 and a control unit 102 that drive the first heating coil unit 60 and the second heating coil unit 70, as well as a control unit 102 that drives the fifth heating coil 80, as described below.
1-2. Configuration of the Heating Coil The configurations of the heating coil and the heating coil unit according to the first embodiment of the present disclosure will be described with reference to FIGS.

As described above, the first heating coil unit 60 is composed of a first heating coil 61 and a second heating coil 62 arranged adjacent to each other in the front-to-rear direction, i.e., the Y-axis direction. In the first embodiment, the first heating coil 61 is arranged at the front and the second heating coil 62 is arranged at the back. The first heating coil 61 and the second heating coil 62 have approximately the same circular outer diameter and are arranged so that they overlap partially. The overlapping portion of the first heating coil 61 and the second heating coil 62 is hereinafter referred to as the first overlapping portion 63.

The first heating coil 61 is composed of six substantially identical sector-shaped coil pieces. The second heating coil 62 is also composed of six substantially identical sector-shaped coil pieces. However, the central angle of the two coil pieces in the first overlapping portion 63 does not face the center of the second heating coil 62, but faces the center of the circle of the first heating coil 61.

As described above, the second heating coil unit 70 is composed of the third heating coil 71 and the fourth heating coil 72 arranged adjacent to each other in the front-to-rear direction, i.e., the Y-axis direction. In the first embodiment, the third heating coil 71 is arranged at the front and the fourth heating coil 72 is arranged at the back. The third heating coil 71 and the fourth heating coil 72 have approximately the same circular outer diameter and are arranged so that they overlap partially. The overlapping portion of the third heating coil 71 and the fourth heating coil 72 is hereinafter referred to as the second overlapping portion 73.

The third heating coil 71 is composed of six substantially identical sector-shaped coil pieces. The fourth heating coil 72 is also composed of six substantially identical sector-shaped coil pieces. However, the central angle of the two coil pieces in the second overlapping portion 73 does not face the center of the fourth heating coil 72, but faces the center of the circle of the third heating coil 71.

The fifth heating coil 80 is disposed in the space between the second heating coil 62 and the fourth heating coil 72. The shape of the fifth heating coil 80 in the first embodiment is an ellipse with the major axis in the Y-axis direction. This allows the fifth heating coil 80 to be disposed even if the gap between the second heating coil 62 and the fourth heating coil 72 is narrow.

Each piece of the first heating coil 61 to the fourth heating coil 72 and the fifth heating coil 80 is made by winding a thin conductor wire multiple times.

A temperature sensor 120 is disposed inside each of the first heating coil 61 to the fifth heating coil 80 .
1-3. Configuration of Light Emitting Section The configuration of the light emitting section according to the first embodiment of the present disclosure will be described with reference to FIGS.

The first light-emitting unit 90A to the seventh light-emitting unit 90G are disposed under the top plate 11 and irradiate light onto the top plate 11 to indicate the position where the cooking container C should be placed. The top plate 11 is provided with a transparent window so that the light from the first light-emitting unit 90A to the seventh light-emitting unit 90G can be seen from the outside.

The first light-emitting element 90A to the third light-emitting element 90C indicate the position where the cooking container C is placed in the first heating coil unit 60. The fourth light-emitting element 90D to the sixth light-emitting element 90F indicate the position where the cooking container C is placed in the second heating coil unit 70. The seventh light-emitting element 90G indicates the position where the cooking container C is placed when using the fifth heating coil 80.

The first light-emitting unit 90A to the third light-emitting unit 90C are arranged in a straight line on both outer sides of the first heating coil unit 60, divided into three parts parallel to the Y axis. The first light-emitting unit 90A is arranged on both outer sides of the front half of the first heating coil 61. The second light-emitting unit 90B is arranged on both outer sides of the back half of the second heating coil 62. The third light-emitting unit 90C is arranged on both outer sides of the first overlapping portion 63, that is, on both outer sides of the back half of the first heating coil 61, or on both outer sides of the front half of the second heating coil 62. The lengths and line widths of the first light-emitting unit 90A to the third light-emitting unit 90C are approximately equal. There is a small gap between each of the first light-emitting unit 90A to the third light-emitting unit 90C. The gap between the first light-emitting unit 90A and the third light-emitting unit 90C and the center of the first heating coil 61 are located in a straight line parallel to the X axis. The gap between the second light-emitting unit 90B and the third light-emitting unit 90C and the center of the second heating coil 62 are located on a straight line parallel to the X-axis. This allows the user to recognize the centers of the first heating coil 61 and the second heating coil 62, and to know the appropriate position for placing the cooking container C.

The fourth light-emitting unit 90D to the sixth light-emitting unit 90F are arranged in a straight line, divided into three parts parallel to the Y-axis, on both outer sides of the second heating coil unit 70. The fourth light-emitting unit 90D is arranged on both outer sides of the front half of the third heating coil 71. The fifth light-emitting unit 90E is arranged on both outer sides of the back half of the fourth heating coil 72. The sixth light-emitting unit 90F is arranged on both outer sides of the second overlapping portion 73, that is, on both outer sides of the back half of the third heating coil 71, or on both outer sides of the front half of the fourth heating coil 72. The lengths and line widths of the fourth light-emitting unit 90D to the sixth light-emitting unit 90F are approximately equal. There is a small gap between each of the fourth light-emitting unit 90D to the sixth light-emitting unit 90F. The gap between the fourth light-emitting unit 90D and the sixth light-emitting unit 90F and the center of the third heating coil 71 are located in a straight line parallel to the X-axis. The gap between the fifth light-emitting element 90E and the sixth light-emitting element 90F and the center of the fourth heating coil 72 are located on a straight line parallel to the X-axis. This allows the user to recognize the centers of the third heating coil 71 and the fourth heating coil 72, and to know the appropriate position to place the cooking container C.

The seventh light-emitting unit 90G is linear and positioned in front of the fifth heating coil 80, parallel to the X-axis.

The first to seventh light-emitting units 90G are each composed of a light-emitting element and a light guide. The light-emitting element is an element that emits light. For example, the light-emitting element is an LED (Light Emitting Diode). The light guide guides the light emitted from the light-emitting element to the top plate 11.
1-4. Configuration of Operation Display Unit The configuration of the operation display unit according to the first embodiment of the present disclosure will be described with reference to FIGS.

The operation display unit is composed of an operation unit and a display unit, and accepts operations to control the states of the first heating coil unit 60, the second heating coil unit 70, and the fifth heating coil 80, and displays the control contents.

As shown in FIG. 2 , the first operation display unit 20 is arranged in front of the first heating coil unit 60, the second operation display unit 30 is arranged in front of the second heating coil unit 70, and the third operation display unit 40 is arranged in front of the fifth heating coil 80.

The first operation display unit 20 to the third operation display unit 40 have almost the same configuration, so the detailed configuration of the first operation display unit 20 will be explained.

The first operation display unit 20 is composed of a first operation unit 21, a first display unit 22, and a first area display unit 23. The first operation unit 21 accepts at least one operation such as selection of the heating state of the first heating coil unit 60, selection of a menu, and adjustment of heat. The first display unit 22 displays the control contents of the first heating coil unit 60 and the functions of the first operation unit 21. The first area display unit 23 displays the area of the first heating coil unit 60 that can be heated, i.e., the first to third heating states described below.

The first operation unit 21 is located in front of the first display unit 22 and the first area display unit 23.

As shown in FIG. 7, the first operation unit 21 is composed of five operation keys and one power button 24. The area selection key 25 is mainly used to start a setting mode for the area in the first heating coil unit 60 where the cooking container C is placed. Specifically, the area selection key 25 is used to switch to a mode for selecting a heatable area in the first heating coil unit 60, that is, a mode for selecting the first to third heating states described later. The time key 26 is mainly used to switch to a mode for setting the timer. The reverse key 27 and forward key 28 are mainly used for menu selection and increasing or decreasing the heat or timer time. The start/on/off key 29 is mainly used to set the start and stop of heating. The power button 24 is used to turn the main power of the main unit on and off. The time key 26, reverse key 27, forward key 28, and start/on/off key 29 function as multi-function switches to which functions different from those described above are assigned depending on the situation. The first operation unit 21 may be a mechanical push button switch or a touch switch including a capacitance switch.

The first display unit 22 displays the contents of the control of the first heating coil unit 60. Alternatively, the first display unit 22 displays characters or figures explaining the function of each key in the area facing the time key 26, reverse key 27, forward key 28, and start/on/off key 29. The first display unit 22 is disposed in front of the first heating coil unit 60 and behind the first operation unit 21. The first display unit 22 is, for example, equipped with a matrix dot liquid crystal display device. The matrix dot liquid crystal display device is, for example, a full dot liquid crystal display panel having a strip shape extending in the width direction of the top plate 11. The first display unit 22 may be a segment display liquid crystal display device.

The first area display unit 23 uses light to indicate the areas of the first heating coil unit 60 that can be heated and the areas that are currently being heated (i.e. the areas that operate in the first to third heating states, which will be described later). It is made up of two frames aligned in the Y-axis direction, and the illuminated frame changes depending on the areas that can be heated and the areas that are currently being heated (i.e. the areas that operate in the first to third heating states). The first area display unit 23 has an LED lamp disposed below it, and is configured so that light only passes through the framed areas to the top of the top plate 11.

It should be noted that the second operation display unit 30 does not have a power button. The third operation display unit 40 does not have a power button, an area display unit, or an area selection key.
1-5. Electrical configuration Fig. 5 is a block diagram of an example of the induction heating cooker 1 according to the first embodiment of the present disclosure. As shown in Fig. 5, the induction heating cooker 1 includes a first heating coil unit 60, a second heating coil unit 70, a fifth heating coil 80, a grill coil 100, a grill heater 101, a first inverter circuit 111, a second inverter circuit 112, a control unit 102, a first light-emitting unit 90A to a seventh light-emitting unit 90G, a first operation display unit 20 to a third operation display unit 40, and a grill operation unit 53.

The control unit 102 controls the operation of the induction heating cooker 1. Specifically, the control unit 102 receives instructions from the first operation display unit 20 to the third operation display unit 40 and the grill operation unit 53, and controls the operation of the first inverter circuit 111, the second inverter circuit 112, the fifth heating coil 80, the grill coil 100, the grill heater 101, and the first light-emitting unit 90A to the seventh light-emitting unit 90G. The control unit 102 includes an arithmetic circuit, a storage device, and drive circuits for the fifth heating coil 80, the grill coil 100, and the grill heater 101.

The arithmetic circuit executes processing in the control unit 102. The arithmetic circuit includes a general-purpose processor such as a CPU (Central Processing Unit) or MPU (Micro Processing Unit) that executes a program to realize a predetermined function. The arithmetic circuit is configured to be able to communicate with a storage device, and realizes various processes in the control unit 102 by calling and executing a calculation program or the like stored in the storage device. The processing in the control unit 102 includes, for example, control of the local intensity of heating by multiple coil pieces and output of a control signal to the inverter circuit 110. The arithmetic circuit is not limited to a form in which hardware resources and software work together to realize a predetermined function, and may be a hardware circuit designed specifically to realize a predetermined function. That is, the arithmetic circuit can be realized by various processors such as a CPU, an MPU, a GPU (Graphics Processing Unit), an FPGA (Field-Programmable Gate Array), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), etc. Such an arithmetic circuit can be configured, for example, by a signal processing circuit that is a semiconductor integrated circuit.

The storage device is a storage medium that can store various information. The storage device is realized, for example, by memories such as DRAM (Dynamic Random Access Memory), SRAM (Static Random Access Memory), flash memory, HDD (Hard Disk Drive), SSD (Solid State Drive), other storage devices, or an appropriate combination of these. The storage device stores programs for implementing the various processes performed by the arithmetic circuit as described above.

The control unit 102 receives instructions from the first operation display unit 20 and controls the operation of the first inverter circuit 111 to control the current flowing through the multiple coil pieces of the first heating coil unit 60. Specifically, the control unit 102 controls the operation of the first inverter circuit 111 to control the first inverter circuit 111 so that a high-frequency current flows through at least some of the multiple coil pieces when the first heating coil unit 60 heats an object to be heated. The control unit 102 can switch between the first to third heating states shown in FIG. 6 by controlling the current flowing through each coil piece.

Similarly, the control unit 102 receives an instruction from the second operation display unit 30 and controls the operation of the second inverter circuit 112 to control the current flowing through the multiple coil pieces of the second heating coil unit 70. Specifically, the control unit 102 controls the operation of the second inverter circuit 112 to control the second inverter circuit 112 so that a high-frequency current flows through at least some of the multiple coil pieces when the second heating coil unit 70 heats an object to be heated. The control unit 102 can switch between the first to third heating states shown in FIG. 6 by controlling the current flowing through each coil piece.

The control unit 102 switches the operation of the first light-emitting unit 90A to the sixth light-emitting unit 90F depending on the first to third heating states.

The control unit 102 receives instructions from the third operation display unit 40 and controls the operation of the fifth heating coil 80 and the seventh light-emitting unit 90G.

The control unit 102 receives instructions from the grill operation unit 53 and controls the operation of the grill coil 100 and the grill heater 101.

The control unit 102 controls the display contents of the first operation/display unit 20 to the third operation/display unit 40 .
2. Operation 2-1. Operation of the Heating Coil Unit The first heating coil unit 60 and the second heating coil unit 70 each have heating modes of first to third heating states shown in FIG.

In the first heating coil unit 60, as shown in FIG. 6(A), the first heating state is a state in which the cooking vessel C is heated using the first heating coil 61. The control unit 102 controls the operation of the first inverter circuit 111 so that the first heating coil 61 is in a heatable state. As shown in FIG. 6(B), the second heating state is a state in which the cooking vessel C is heated using the second heating coil 62. The control unit 102 controls the first inverter circuit 111 so that the second heating coil 62 is in a heatable state. As shown in FIG. 6(C), the third heating state is a state in which the first heating coil 61 and the second heating coil 62 are used to heat a large cooking vessel C placed across the first heating coil 61 and the second heating coil 62. The control unit 102 controls the operation of the first inverter circuit 111 so that the first heating coil 61 and the second heating coil 62 are in a heatable state.

In the second heating coil unit 70, as shown in FIG. 6(A), the first heating state is a state in which the cooking vessel C is heated using the fourth heating coil 72. The control unit 102 controls the operation of the second inverter circuit 112 so that the fourth heating coil 72 is in a heatable state. As shown in FIG. 6(B), the second heating state is a state in which the cooking vessel C is heated using the fourth heating coil 72. The control unit 102 controls the second inverter circuit 112 so that the fourth heating coil 72 is in a heatable state. As shown in FIG. 6(C), the third heating state is a state in which a large cooking vessel C placed across the third heating coil 71 and the fourth heating coil 72 is heated. The control unit 102 controls the operation of the second inverter circuit 112 so that the third heating coil 71 and the fourth heating coil 72 are in a heatable state.

When a heating mode in which the first heating coil unit 60 operates in the first heating state is selected, the control unit 102 controls the first light-emitting unit 90A and the third light-emitting unit 90C to blink. At this time, the control unit 102 keeps the second light-emitting unit 90B turned off. Furthermore, when heating is started in the first heating state, the control unit 102 controls the first light-emitting unit 90A and the third light-emitting unit 90C to light up. Also, when a heating mode in which the first heating coil unit 60 operates in the second heating state is selected, the control unit 102 controls the second light-emitting unit 90B and the third light-emitting unit 90C to blink. At this time, the control unit 102 keeps the first light-emitting unit 90A turned off. Furthermore, when heating is started in the second heating state, the control unit 102 controls the second light-emitting unit 90B and the third light-emitting unit 90C to light up. When a heating mode in which the first heating coil unit 60 operates in the third heating state is selected, the control unit 102 controls the first light-emitting unit 90A to the third light-emitting unit 90C to blink. When heating is started in the third heating state, the control unit 102 controls the first light-emitting unit 90A to the third light-emitting unit 90C to light up.

Similarly, in the second heating coil unit 70, when a heating mode that operates in the first heating state is selected, the control unit 102 controls the fourth light-emitting unit 90D and the sixth light-emitting unit 90F to blink. At this time, the control unit 102 keeps the fifth light-emitting unit 90E turned off. Furthermore, when heating is started in the first heating state, the control unit 102 controls the fourth light-emitting unit 90D and the sixth light-emitting unit 90F to light up. Also, in the second heating coil unit 70, when a heating mode that operates in the second heating state is selected, the control unit 102 controls the fifth light-emitting unit 90E and the sixth light-emitting unit 90F to blink. At this time, the control unit 102 keeps the fourth light-emitting unit 90D turned off. Furthermore, when heating is started in the second heating state, the control unit 102 controls the fifth light-emitting unit 90E and the sixth light-emitting unit 90F to light up. Furthermore, when a heating mode that operates in the third heating state is selected in the second heating coil unit 70, the control unit 102 controls the fourth light-emitting unit 90D to the sixth light-emitting unit 90F to blink. Furthermore, when heating is started in the third heating state, the control unit 102 controls the fourth light-emitting unit 90D to the sixth light-emitting unit 90F to light up.

In addition, in Figs. 6(A) to (C), the first heating coil unit 60 and the second heating coil unit 70 are described as being in the same heating state, but the first heating coil unit 60 and the second heating coil unit 70 may be in different heating states. For example, when the first heating coil unit 60 operates in the first heating state shown in Fig. 6(A), the second heating coil unit 70 may operate in the second heating state or the third heating state shown in Figs. 6(B) and (C).

In addition, in this embodiment, when a heating mode that operates in the first to third heating states is selected, the corresponding first light-emitting unit 90A to sixth light-emitting unit 90F flashes, and when the first to third heating states are started, the first light-emitting unit 90A to sixth light-emitting unit 90F lights up, but the combination of flashing and lighting can be selected as appropriate.
7 to 12, the operations of the first operation display unit 20 and the second operation display unit 30 will be described. Note that since the operation of the first heating coil unit 60 on the first operation display unit 20 is common to the operation of the second heating coil unit 70 on the second operation display unit 30, the description of the operation of the second operation display unit 30 will be omitted.
2-2-1. Description of heating in the first heating state When a user presses the power button 24 of the first operation unit 21 to turn on the main power of the main body, the first display unit 22 and the first area display unit 23 of the first operation display unit 20 are displayed as shown in FIG. 7(A) which is the initial state.

That is, in the first display unit 22, an object indicating a first heating state is displayed in an area A corresponding to the time key 26. An object indicating a second heating state is displayed in an area B corresponding to the reverse key 27. An object indicating a third heating state is displayed in an area C corresponding to the forward key 28. The objects indicating the first to third heating states are simplified illustrations of the positional relationship between the first to third light-emitting units 90A to 90C and the heating coils used. The user selects one of the heating modes operating in the first to third heating states, and presses one of the three operation keys corresponding to the respective heating states. When selecting a heating mode operating in the first heating state, the time key 26 is pressed. When selecting a heating mode operating in the second heating state, the reverse key 27 is pressed. When selecting a heating mode operating in the third heating state, the user presses the
The forward key 28 is pressed.

When the user presses the time key 26 to select the heating mode that operates in the first heating state, the first display unit 22 transitions to the display shown in FIG. 7(B). That is, the first display unit 22 displays a menu that can be implemented in the heating mode that operates in the first heating state, and the desired menu can be selected by operating the reverse key 27 and the forward key 28. When the heating mode that operates in the first heating state is selected, the front frame indicating the first heating state of the first area display unit 23 emits light. On the top surface of the top plate 11, the first light-emitting unit 90A and the third light-emitting unit 90C corresponding to the first heating state flash, as shown in FIG. 6(A).

When the user selects the "heating" menu and presses the start/off key 29 in the state of FIG. 7(B), heating starts, and the first display section 22 and the first area display section 23 transition to the display of FIG. 7(C). The user can adjust the heat by operating the reverse key 27 and the forward key 28. On the top surface of the top plate 11, the first light-emitting section 90A and the third light-emitting section 90C change from blinking to lighting. When the user presses the start/off key 29 again in the state of FIG. 7(C), heating stops. After heating stops, the control section 102 determines whether the top plate 11 is lower than a predetermined temperature based on the temperature detected by the temperature sensor 120 in the first heating coil 61. When the control section 102 determines that the top plate 11 is lower than a predetermined temperature, it controls the first light-emitting section 90A and the third light-emitting section 90C to be turned off. When the control unit 102 determines that the temperature of the top plate 11 is higher than a predetermined temperature, it controls the first light-emitting unit 90A and the third light-emitting unit 90C to light up or blink.
2-2-2. Description of heating in the second and third heating states With reference to FIG. 8, the operation of the operation display unit when changing from a state in which the heating mode operating in the first heating state is selected to a heating mode operating in the second and third heating states will be described.

When the user selects a heating mode that operates in the first heating state in FIG. 7(A) and transitions to the menu selection screen in FIG. 7(B), i.e., FIG. 8(A), to change to a heating mode that operates in the second heating state, the user presses the area selection key 25, as shown in FIG. 8(A), or the time key 26 corresponding to "Cancel" shown on the first display unit 22.

When the user presses the area selection key 25 or time key 26 in the state shown in FIG. 8(A), the area selection screen is displayed again as shown in FIG. 8(B), and the user must again press the reverse key 27 corresponding to the heating mode that operates in the second heating state.

When the user presses the reverse key 27, the first display unit 22 and the first area display unit 23 transition to the display shown in FIG. 8(C). That is, the first display unit 22 displays a menu that can be implemented in the heating mode that operates in the second heating state, and the desired menu can be selected by operating the reverse key 27 and the forward key 28. When a heating mode that operates in the second heating state is selected, the frame on the back side of the first area display unit 23 that indicates the second heating state lights up. On the top surface, the second light-emitting unit 90B and the third light-emitting unit 90C that correspond to the second heating state flash.

When changing from the state of FIG. 8(C) to a heating mode that operates in the third heating state, the user presses the area selection key 25 or the time key 26 to transition to the area selection screen of FIG. 8(B). Next, when the user presses the forward key 28 corresponding to the heating mode that operates in the third heating state in the state of FIG. 8(B), the first display unit 22 and the first area display unit 23 transition to the display of FIG. 8(D). That is, the first display unit 22 displays menus that can be implemented in the heating mode that operates in the third heating state, and the desired menu can be selected by operating the reverse key 27 and the forward key 28. When the heating mode that operates in the third heating state is selected, the first area display unit 23 emits light on both the front and back frames to indicate the third heating state. On the top surface of the top plate 11, the first light-emitting unit 90A to the third light-emitting unit 90C corresponding to the third heating state flash.

After heating is started in the second heating state and heating is stopped, the control unit 102 determines whether the top plate 11 is lower than the predetermined temperature based on the temperature detected by the temperature sensor 120 in the second heating coil 62. If the control unit 102 determines that the top plate 11 is lower than the predetermined temperature, it controls the second light-emitting unit 90B and the third light-emitting unit 90C to turn off. If the control unit 102 determines that the top plate 11 is higher than the predetermined temperature, it controls the second light-emitting unit 90B and the third light-emitting unit 90C to light up or blink.

After starting heating in the third heating state and stopping heating, the control unit 102 determines whether the top plate 11 is lower than a predetermined temperature based on the temperatures detected by the temperature sensors 120 in the first heating coil 61 and the second heating coil 62. If the temperature detected by the temperature sensor 120 in the first heating coil 61 is higher than a predetermined reference value and the temperature detected by the temperature sensor 120 in the second heating coil 62 is lower than a predetermined reference value, the control unit 102 controls the first light-emitting unit 90A and the third light-emitting unit 90C to light up or blink, and the second light-emitting unit 90B to turn off.

In addition, when the temperature detected by the temperature sensor 120 in the first heating coil 61 is lower than a predetermined reference value and the temperature detected by the temperature sensor 120 in the second heating coil 62 is higher than a predetermined reference value, the control unit 102 controls the second light-emitting unit 90B and the third light-emitting unit 90C to light up or blink, and the first light-emitting unit 90A to be turned off.

In addition, when the temperature detected by the temperature sensor 120 in the first heating coil 61 is higher than a predetermined reference value and the temperature detected by the temperature sensor 120 in the second heating coil 62 is higher than a predetermined reference value, the control unit 102 controls the first light-emitting unit 90A to the third light-emitting unit 90C to light up or blink.

In addition, when the detected temperature of the temperature sensor 120 in the first heating coil 61 is lower than a predetermined reference value and the detected temperature of the temperature sensor 120 in the second heating coil 62 is lower than a predetermined reference value, the control unit 102 controls the first light-emitting unit 90A to the third light-emitting unit 90C to be turned off.
2-2-3. Transition from the first heating state to the second heating state Using FIG. 9, the operation of the operation display unit when the position of the cooking container C is moved during heating in the first heating state to change to the second heating state will be described.

9(A) shows the first operation display unit 20 when the "heating" menu is started in the first heating state. In the state of FIG. 9(A), if the user wants to move the cooking container C to the back side of the top surface of the top plate 11, that is, to change from the first heating state to the second heating state and continue cooking, the user presses the area selection key 25. When the user presses the area selection key 25 in the state of FIG. 9(A), the first display unit 22 and the first area display unit 23 transition to the display of FIG. 9(B). Next, in the state of FIG. 9(B), when the user presses the forward key 28 corresponding to "move to the back", the first display unit 22 and the first area display unit 23 transition to the display of FIG. 9(C). In other words, heating is started in the second heating state with the same menu and the same heat as when heating in the first heating state. As the heating state changes, the front frame of the first area display unit 23, which indicates the first heating state, goes out, and the rear frame, which indicates the second heating state, lights up. On the top surface of the top plate 11, the first light-emitting unit 90A and the third light-emitting unit 90C, which correspond to the first heating state, change from being lit to being lit by the second light-emitting unit 90B and the third light-emitting unit 90C, which correspond to the second heating state.

The same applies when changing from the second heating state to the first heating state. That is, when the user presses the area selection key 25 and then the forward key 28 while the second heating state is in progress, heating is started in the first heating state with the same menu and heat as when heating in the second heating state.

On the other hand, when changing from the first heating state to the third heating state, in FIG. 9(A), the user must press the start/on/off key 29 to stop heating in the first heating state. It is not possible to change to the third heating state while maintaining the heating conditions in the first heating state.

Similarly, when changing from the second heating state to the third heating state, in FIG. 9(A), the user must press the start/on/off key 29 to stop heating in the second heating state once. It is not possible to change to the third heating state while maintaining the heating conditions in the second heating state.

Furthermore, when changing from the third heating state to the first or second heating state, the user must stop the heating in the third heating state once by pressing the start/off key 29. It is not possible to change to the first or second heating state while maintaining the heating conditions in the third heating state.
2-2-4. Description of Use of Fifth Heating Coil 80 The operation of heating the cooking vessel C using the fifth heating coil 80 will be described with reference to FIG.

When the user presses the power button 24 of the first operation unit 21 to turn on the main power of the main body, the third operation display unit 40 is displayed as shown in FIG. 10. That is, in the third display unit 42, an object indicating heating by the fifth heating coil 80 is displayed in the area corresponding to the time key 46. The object indicating heating by the fifth heating coil 80 is a simplified illustration of the positional relationship between the seventh light-emitting unit 90G and the fifth heating coil 80. When the user presses the time key 46 in the state of FIG. 10, a menu that can be performed by the fifth heating coil 80 is displayed on the third display unit 42, and the desired menu can be selected by operating the reverse key 47 and the forward key 48. Also, when the user presses the time key 46 in the state of FIG. 10, the seventh light-emitting unit 90G flashes on the top surface of the top plate 11. When the user selects a menu and presses the start/on/off key 49 to start heating, the seventh light-emitting unit 90G changes from flashing to lighting.
2-2-5. Transition when the fifth heating coil 80 is unavailable The third operation display unit 40 when the fifth heating coil 80 is unavailable will be described with reference to FIG.

If either or both of the second heating coil 62 of the first heating coil unit 60 and the fourth heating coil 72 of the second heating coil unit 70 are used before the fifth heating coil 80, the fifth heating coil 80 cannot be used. In other words, if any one of the second heating state and the third heating state of the first heating coil unit 60 and the second heating state and the third heating state of the second heating coil unit 70 are used before the fifth heating coil 80, the fifth heating coil 80 cannot be used.

When the fifth heating coil 80 cannot be used, the third display unit 42 is displayed as shown in FIG. 11(A). That is, the triangular mark that serves as a marker corresponding to the time key 46, which is displayed in front of the object indicating heating by the fifth heating coil 80, is turned off.

When the user presses the time key 46 in the state shown in FIG. 11(A), the third display section 42 displays as shown in FIG. 11(B).
2-2-6. Description of the Case Where the Second Heating Coil 62 and the Fourth Heating Coil 72 Cannot Be Used The first operation/display unit 20 and the second operation/display unit 30 when the second heating coil 62 and the fourth heating coil 72 cannot be used will be described with reference to FIG. 12.

If the fifth heating coil 80 is used first, the second heating coil 62 and the fourth heating coil 72 cannot be used. That is, if the fifth heating coil 80 is used first, the user cannot select a heating mode that operates in the second heating state and a heating mode that operates in the third heating state with the first heating coil unit 60. Similarly, the user cannot select a heating mode that operates in the second heating state and a heating mode that operates in the third heating state with the second heating coil unit 70.

The first operation display unit 20 and the second operation display unit 30 have almost the same configuration, so the first operation display unit 20 will be used for explanation.

When the fifth heating coil 80 is used first, the first display unit 22 is displayed as shown in FIG. 12. That is, on the first display unit 22, the reverse key 27 and the forward key 28 displayed in front of the object indicating the second heating state and the object indicating the third heating state, respectively, and the corresponding triangular marks serving as markers are turned off.

In the state shown in Figure 12, when the user selects a heating mode operating in the second heating state or a heating mode operating in the third heating state and presses the reverse key 27 or the forward key 28, the first display unit 22 displays the fact that it cannot be used.
3. Effects The effects of the induction heating cooker 1 according to the first embodiment of the present disclosure will be described below. Note that effects common to the first heating coil unit 60 and the second heating coil unit 70 will be described for the first heating coil unit 60.

The induction heating cooker 1 according to the first embodiment of the present disclosure includes a top plate 11, a first heating coil unit 60 provided below the top plate 11 and inductively heating an object to be heated placed on the top plate 11, a first inverter circuit 111 that supplies high-frequency current to the first heating coil unit 60, a first light-emitting unit 90A to a third light-emitting unit 90C provided near the first heating coil unit 60, and a control unit 102 that controls the first inverter circuit 111 and the first light-emitting unit 90A to the third light-emitting unit 90C.

The first heating coil unit 60 has a first heating coil 61 and a second heating coil 62 that is adjacent to the first heating coil 61 and drives in part in common with the first heating coil 61.

The common portion between the first heating coil 61 and the second heating coil 62 is referred to as the first overlapping portion 63.

The first light-emitting unit 90A to the third light-emitting unit 90C include a first light-emitting unit 90A provided on the outside of the first heating coil 61 in the width direction (X-axis direction in this embodiment) of the portion excluding the first overlapping portion 63 from the first heating coil 61 in the direction from the first heating coil 61 to the second heating coil 62 (Y-axis direction in this embodiment), a second light-emitting unit 90B provided on the outside of the second heating coil 62 in the width direction (X-axis direction in this embodiment) of the portion excluding the first overlapping portion 63 from the second heating coil 62, and a third light-emitting unit 90C provided on the outside of the first overlapping portion 63 in the width direction (X-axis direction in this embodiment).

Therefore, in the induction heating cooker 1 of this embodiment, the first light-emitting unit 90A to the third light-emitting unit 90C can be efficiently arranged while indicating the appropriate position for heating the object to be heated. In other words, in the induction heating cooker 1 of this embodiment, the first light-emitting unit 90A to the third light-emitting unit 90C are arranged separately, so that the appropriate position for heating the object to be heated is easy to see. In addition, since the first to third light-emitting units 90C can be arranged outside the coil pieces regardless of the shape of the coil pieces, the mechanism or arrangement can be simplified and the number of parts can be reduced. In addition, since the first light-emitting unit 90A to the third light-emitting unit 90C can be arranged without overlapping a portion, the arrangement efficiency is high.

The control unit 102 selectively switches between a first heating state in which the first heating coil 61 is heated, a second heating state in which the second heating coil 62 is heated, and a third heating state in which the first heating coil 61 and the second heating coil 62 are heated. In the first heating state, the first light-emitting unit 90A and the third light-emitting unit 90C are turned on. In the second heating state, the second light-emitting unit 90B and the third light-emitting unit 90C are turned on. In the third heating state, the first light-emitting unit 90A, the second light-emitting unit 90B, and the third light-emitting unit 90C are turned on.

The induction heating cooker 1 of the first embodiment lights up one of the first light-emitting unit 90A to the third light-emitting unit 90C in response to the first to third heating states, so that the user can easily identify the appropriate position for heating the object to be heated.

When the user presses the power button 24 and the main power is turned on in the initial state, the control unit 102 is configured to, upon receiving a selection to start heating in the first heating state, light or blink the first light-emitting unit 90A and the third light-emitting unit 90C and turn off the second light-emitting unit 90B, and when the user presses the power button 24 again and the main power is turned off, turn off the first light-emitting unit 90A to the third light-emitting unit 90C.

Therefore, the induction heating cooker 1 of the present embodiment 1 allows the user to easily recognize the appropriate position for heating the object to be heated.

When the control unit 102 detects that the first heating coil unit 60 is in a non-heating state, that the top plate 11 above the first heating coil 61 is hotter than a predetermined temperature, and that the top plate 11 above the second heating coil 62 is colder than a predetermined temperature, the control unit 102 lights or blinks the first light-emitting unit 90A and the third light-emitting unit 90C that correspond to the high temperature area, and turns off the second light-emitting unit 90B.

Therefore, the induction heating cooker 1 of this embodiment 1 allows the user to recognize the high-temperature areas of the top plate 11, reducing the risk of accidentally touching the high-temperature top plate 11.

When the first heating coil unit 60 is in a non-heating state, the top plate 11 is not at a temperature higher than the predetermined temperature, and the first heating coil unit 60 has not received a selection to start heating, the control unit 102 turns off the first light-emitting unit 90A to the third light-emitting unit 90C.

Therefore, the induction heating cooker 1 of the present embodiment 1 allows the user to recognize that the first heating coil unit 60 is in a non-heating state and that the top plate 11 is not hot.

When the first heating coil 61 and the second heating coil 62 are adjacent to each other in the front-to-back direction, a second heating coil unit 70 is provided below the top plate 11, next to the first heating coil unit 60 in the left-to-right direction (in the X-axis direction in this embodiment), and the second heating coil unit 70 has a third heating coil 71 and a fourth heating coil 72 that is adjacent to the third heating coil 71 in the front-to-back direction and drives in common with part of the third heating coil 71. A fifth heating coil 80 and a seventh light-emitting unit 90G are provided in the space sandwiched between the second heating coil 62 and the fourth heating coil 72, and when at least one of the second heating coil 62 and the fourth heating coil 72 is in a state of heating or accepting the start of heating, the seventh light-emitting unit 90G is turned off.

Therefore, in the induction heating cooker 1 of the present embodiment 1, when at least one of the second heating coil 62 and the fourth heating coil 72 is heating or has received a request to start heating, the fifth heating coil 80 cannot be used, thereby reducing interference noise and preventing cooking with cooking containers C close to each other, allowing the user to cook safely.

When the first heating coil 61 and the second heating coil 62 are adjacent to each other in the front-rear direction, a second heating coil unit 70 is provided below the top plate 11 next to the first heating coil unit 60 in the left-right direction (the X-axis direction in this embodiment), and the second heating coil unit 70 has a third heating coil 71 and a fourth heating coil 72 that is adjacent to the third heating coil 71 in the front-rear direction and drives in part in common with the third heating coil 71. A fifth heating coil 80 and a seventh light-emitting unit 90G are provided in the space between the second heating coil 62 and the fourth heating coil 72, and when at least one of the second heating coil 62 and the fourth heating coil 72 is in a state of heating or accepting the start of heating, the fifth heating coil 80 is controlled not to accept the selection of the start of heating.

Therefore, in the induction heating cooker 1 of the present embodiment 1, when at least one of the second heating coil 62 and the fourth heating coil 72 is in the process of heating or has received a request to start heating, the fifth heating coil 80 cannot be used, thereby reducing interference noise and preventing cooking with cooking containers C close to each other, allowing the user to cook safely.

When the control unit 102 receives a command to change to the second or third heating state while in the first heating state, it switches which of the first to third light-emitting units 90A to 90C to turn on.

Therefore, in the induction heating cooker 1 of this embodiment, the first light-emitting unit 90A to the third light-emitting unit 90C can be efficiently arranged while indicating appropriate positions for heating the object to be heated. 4. Other embodiments (1) Arrangement of heating coils In this embodiment, the first heating coil 61 and the second heating coil 62 are described as being arranged adjacent to each other in the Y-axis direction, but they may be arranged adjacent to each other in the X-axis direction, for example. In that case, the first light-emitting unit 90A to the third light-emitting unit 90C may also be arranged parallel to the X-axis direction.
(2) Mode of Heating Coil In the present embodiment, the substantially circular first heating coil 61 composed of six substantially identical sector-shaped coil pieces and the substantially circular second heating coil 62 composed of six substantially identical sector-shaped coil pieces are arranged so as to overlap with each other, but the mode of the heating coil is not limited to this. For example, the first heating coil unit may be composed of three elliptical heating coils arranged adjacent to each other in the Y-axis direction. The two front heating coils may be used as the first heating coil 61, and the two rear heating coils may be used as the second heating coil 62. The coil in the middle corresponds to the first overlapping portion 63.
(3) Other aspects of the light-emitting section In this embodiment, the first light-emitting section 90A to the seventh light-emitting section 90G are linear, but they may be, for example, a number of dots of light arranged in a line (i.e., a dotted line), or they may be wavy or curved lines.
(4) Method of selecting a heating mode that operates in the first to third heating states In this embodiment, the user can select one of the heating modes that operate in the first to third heating states and press one of the three operation keys corresponding to the respective heating states to select a heating mode that operates in the first to third heating states. However, for example, it is also possible to select a heating mode that operates in the first to third heating states by the number of times one selection key is pressed.

This disclosure can be applied to induction heating cookers that inductively heat objects to be heated, such as pots.

REFERENCE SIGNS LIST 1 induction heating cooker C cooking container 10 top unit 11 top plate 20 first operation display unit 21 first operation unit 22 first display unit 23 first area display unit 24 power button 25 area selection key 26, 46 time key 27, 47 reverse key 28, 48 forward key 29, 49 start/on/off key 30 second operation display unit 40 third operation display unit 42 third display unit 50 main unit 51 housing 52 grill chamber 53 grill operation unit 60 first heating coil unit 61 first heating coil 62 second heating coil 63 first overlapping portion 70 second heating coil unit 71 third heating coil 72 fourth heating coil 73 second overlapping portion 80 fifth heating coil 90A first light-emitting portion 90B Second light-emitting unit 90C Third light-emitting unit 90D Fourth light-emitting unit 90E Fifth light-emitting unit 90F Sixth light-emitting unit 90G Seventh light-emitting unit 100 Grill coil 101 Grill heater 102 Control unit 110 Inverter circuit 111 First inverter circuit 112 Second inverter circuit 120 Temperature sensor

Claims (8)

A top plate and
A first heating coil unit is provided below the top plate and inductively heats an object to be heated placed on the top plate;
an inverter circuit that supplies a high-frequency current to the first heating coil unit;
A plurality of light emitting units provided in the vicinity of the first heating coil unit;
a control unit that controls the inverter circuit and the plurality of light-emitting units,
The first heating coil unit includes:
A first heating coil;
a second heating coil adjacent to the first heating coil and driven in common with the first heating coil;
having
A common portion between the first heating coil and the second heating coil is defined as an overlapping portion;
The plurality of light emitting units include
In a direction from the first heating coil to the second heating coil,
a first light-emitting unit provided on the outer side in a width direction of a portion excluding the overlapping portion from the first heating coil;
a second light-emitting unit provided on the outer side in a width direction of a portion excluding the overlapping portion from the second heating coil;
and a third light-emitting portion provided on the outer side of the overlapping portion in the width direction.
Induction heating cooker. The control unit is
a first heating state in which the first heating coil is heated;
a second heating state in which the second heating coil is heated; and
a third heating state in which the first heating coil and the second heating coil are heated; and
Selectively take
In the first heating state, the first light emitting unit and the third light emitting unit are turned on;
In the second heating state, the second light emitting unit and the third light emitting unit are turned on;
The induction heating cooker according to claim 1 , configured to light up the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit in the third heating state. The control unit is
When a selection of starting heating in the first heating state is received in an initial state in which a main power source is turned on, the first light-emitting unit and the third light-emitting unit are turned on or blink, and the second light-emitting unit is turned off;
The induction heating cooker according to claim 2 , wherein the light emitting units are turned off when the main power supply is turned off. The control unit is
In a state where the first heating coil unit is in a non-heated state, it is detected that the top plate above the first heating coil is higher than a predetermined temperature, and it is detected that the top plate above the second heating coil is lower than a predetermined temperature,
3. The induction heating cooker according to claim 1, wherein the first light-emitting portion and the third light-emitting portion corresponding to a high-temperature area are turned on or blink, and the second light-emitting portion is turned off. The control unit is
When the first heating coil unit is in a non-heated state and the top plate is not in a state where the temperature is higher than a predetermined temperature,
3. The induction heating cooker according to claim 1, wherein the plurality of light emitting parts are turned off when the first heating coil unit has not received a selection to start heating. When the first heating coil and the second heating coil are adjacent to each other in the front-rear direction, a second heating coil unit is provided below the top plate and adjacent to the first heating coil unit in the left-right direction,
The second heating coil unit includes:
a third heating coil;
a fourth heating coil adjacent to the third heating coil in the front and rear directions and driven in common with the third heating coil;
having
In a space between the second heating coil and the fourth heating coil,
A fifth heating coil and a light emitting unit are provided,
When at least one of the second heating coil and the fourth heating coil is in a heating state or is in a state of accepting the start of heating,
The induction heating cooker according to claim 1 or 2, wherein the light emitting portion is turned off. When the first heating coil and the second heating coil are adjacent to each other in the front-rear direction, a second heating coil unit is provided below the top plate and adjacent to the first heating coil unit in the left-right direction,
The second heating coil unit includes:
a third heating coil;
a fourth heating coil adjacent to the third heating coil in the front and rear directions and driven in common with the third heating coil;
having
In a space between the second heating coil and the fourth heating coil,
A fifth heating coil and a light emitting unit are provided,
When at least one of the second heating coil and the fourth heating coil is in a heating state or is in a state of accepting the start of heating,
3. The induction heating cooker according to claim 1, wherein the fifth heating coil is controlled so as not to accept a selection to start heating. The control unit is
When a change to the second heating state or the third heating state is received during the first heating state,
The induction heating cooker according to claim 2 , wherein a light-emitting part to be lit is switched among the plurality of light-emitting parts.

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