JP2009231235A - Induction heating cooking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooking device realizing cooking with heat by a simple operation without automatic selection of a highly efficient heating coil. <P>SOLUTION: The cooking device includes an operation section accepting input of operation to actuate an inverter 3 in a predetermined power saving mode and outputting an operation signal indicative of this operation to a control section 5. A load detecting section 11 detects that an object to be heated is placed above the heating coil per heating coil and the control section 5 controls the inverter 3 to supply an AC current to the heating coil detected so that the heated object has been placed above it by the load detecting section 11, and controls the inverter 3 not to supply the AC current to other heating coils, and when receiving an operation signal from the operation section, drives and controls the inverter 3 not to supply the AC current to a heating coil of use efficiency less than a predetermined level. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an induction heating cooker.

  Conventionally, regarding the induction heating cooker, as a technique intended to “provide an induction heating cooker that enables efficient heating according to the size of the pan bottom”, “placement for placing the pan 5” The induction coil 2 provided below the plate 6 is composed of an inner coil 3 and an outer coil 4, and is provided with a pan determination means 18 and a coil energization control means 19. The pot determining means 18 determines the size of the diameter of the bottom of the pot 5 based on the value of the current flowing through the inner coil 3 and the outer coil 4. The coil energization control unit 19 individually controls energization of the inner coil 3 and the outer coil 4 based on the determination result of the pan determination unit 18. Is proposed (Patent Document 1).

  Further, it is also disclosed that the induction heating cooker includes a “coil selection unit that manually turns on and off the energization of the inner coil and / or the outer coil”.

Japanese Unexamined Patent Application Publication No. 2004-127721 (Abstract, Claim 2)

In the technique described in Patent Literature 1, the coil energization control unit 19 automatically selects the heating coil to be energized based on the determination result of the pan determination unit 18 to perform efficient heating, or the heating coil to be energized is selected. Can be selected manually.
However, according to this technique, when an efficient heating coil is not automatically selected, the user must manually select a heating coil to be energized. It is complicated.

  The present invention has been made to solve the above problems, and provides an induction heating cooker that can perform cooking by simple operation even when efficient automatic heating coil selection is not performed. The purpose is to do.

  An induction heating cooker according to the present invention includes a plurality of heating coils that heat an object to be heated, an inverter that supplies an alternating current to the heating coil, a control unit that drives and controls the inverter, and an upper part of the heating coil. A load detection unit for detecting that an object to be heated is placed; an operation unit for receiving an operation input for operating the inverter in a predetermined power saving mode and outputting an operation signal to the control unit; The load detection unit detects, for each heating coil, that the object to be heated is placed above the heating coil, and the control unit has placed the object to be heated above. The inverter is controlled so as to supply an alternating current to the heating coil detected by the load detection unit, and the inverter is controlled so as not to supply an alternating current to the other heating coils, If the work unit receives the operation signal, the said heating coil utilization is below the predetermined level and controls driving the inverter so as not to supply an alternating current.

The induction heating cooker according to the present invention supplies an alternating current only to a heating coil on which an object to be heated is placed above, and automatically detects a heating coil with good use efficiency when operating in a power saving mode. AC current is supplied only to the heating coil.
This eliminates the need for the user to manually select a heating coil to be energized even when automatic selection of an efficient heating coil is not performed.
In addition, since it is possible to switch whether or not to automatically select an efficient heating coil only by the input of the operation unit, it is possible to simplify the user's operation input.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of induction heating cooker 100 according to Embodiment 1 of the present invention.

The top plate 1 is for placing an object to be heated. The top plate 1 is placed on the upper surface of the main body housing 2 to store the internal structure of the main body housing 2.
The main body housing 2 houses the inverter 3, the display unit 7, and the heating coils 8a to 8t.
The inverter 3 converts direct current power into alternating current, and supplies a high frequency current to the heating coils 8a to 8t. The induction heating cooker 100 includes a control unit 5 (not shown), and the control unit 5 drives and controls a switching element included in the inverter 3.
The operation units 6a to 6d are for the user to adjust the heating output.
The display unit 7 is a screen display device composed of a liquid crystal display device or the like, and a corresponding portion of the top plate 1 is transmitted so that display contents can be viewed from the top plate 1.
The eco mode switch 9 is a switch for the user to instruct the induction heating cooker 100 to switch on / off a power saving mode (hereinafter referred to as “eco mode”) described in FIG.

The heating coils 8a to 8t have a coil diameter of 100 mm or less, for example, and are arranged so that the distance between the coil edges is 20 mm or less. The total area of the upper surfaces of the heating coils 8a to 8t (the area of the circular portion) is set to be, for example, 50% or more of the surface area of the top plate 1.
Further, a plurality of heating coils 8a to 8t are arranged in a row in the depth direction and in the lateral direction. In the arrangement example of FIG. 1, a maximum of four heating coils (such as heating coils 8a to 8d) are arranged in the depth direction, and a maximum of six heating coils (heating coils 8a, 8e, 8i, 8k, 8m, 8q, etc.) are arranged in the horizontal direction. ing.

By determining the coil diameter and the arrangement in this way, the heating regions of the heating coils are overlapped and connected to each other, so that even if a heated object such as a pan is placed on any part of the top plate 1, it is almost certain. Therefore, the degree of freedom of the placement position of the object to be heated increases.
The coil diameter and arrangement are not limited to those described above, and other configurations may be adopted according to the size of the top plate 1 and the main body housing 2. Moreover, the structure by which each heating coil is multiply arranged by concentric form is also possible. In the following description, an example different from the arrangement example of FIG. 1 is used as necessary.

FIG. 2 is a diagram illustrating the eco mode.
When the user presses the eco mode switch 9 to turn on the eco mode, the induction heating cooker 100 performs heating cooking in an operation mode called eco mode. This eco-mode is an operating state in which cooking is performed in a state where only a heating coil with good use efficiency is energized and power use efficiency is increased.
Hereinafter, the energized state of the heating coil will be described while comparing the normal mode and the eco mode.

Fig.2 (a) is a figure which shows the electricity supply state of the heating coil at the time of normal mode operation | movement.
During normal mode operation, when a heated object such as a pan is placed above the heating coil, the heating coil is energized regardless of the efficiency of use of the heating coil.

FIG. 2B is a diagram showing the energization state of the heating coil during the eco mode operation.
During the eco mode operation, even if an object to be heated such as a pan is placed above the heating coil, the heating coils other than the heating coil with good use efficiency are not energized.

FIG. 3 is a functional block diagram of the induction heating cooker 100.
In addition to the configuration described in FIG. 1, the induction heating cooker 100 includes a coil efficiency detection unit 11, a determination unit 12, and a storage unit 13.
In addition, in FIG. 3, it should be added that only components related to the use efficiency of the heating coil are illustrated.

The coil efficiency detection unit 11 detects the use efficiency of each heating coil included in the induction heating cooker 100 and outputs the detection result to the determination unit 12.
Here, the usage efficiency is an index indicating whether or not each heating coil can exert a heating output that can be exerted on the object to be heated. For example, the usage efficiency is a numerical value of 0% to 100%. Can be represented. In addition to the usage efficiency, it can also be detected whether each heating coil is used.
Any known technique can be used as a method for detecting the usage efficiency. For example, the following (1) to (4) are conceivable.

(1) The efficiency of the heating coil is calculated using the leakage magnetic flux.
(2) The use efficiency is calculated based on the degree of magnetic coupling between the heating coil and the object to be heated.
(3) Impedance change when the object to be heated is placed on the top plate 1 is detected by changes in current and voltage, and whether or not the heating coil is used is detected based on these values.
(4) Photograph the mounting state of the object to be heated with a camera or the like from above the top plate 1 (for example, in the range hood), and use the degree of overlap between the position of each heating coil and the position of the object to be heated, Use efficiency of each heating coil is calculated.

The determination unit 12 determines the usage efficiency level of each heating coil based on the detection result of the coil efficiency detection unit 11.
Here, the usage efficiency level represents the goodness of the usage efficiency in stages based on the usage efficiency value of the heating coil detected by the coil efficiency detection unit 11. For example, usage efficiency of 0% to 19% can be expressed as usage efficiency level 1, 20% to 39% can be expressed as usage efficiency level 2, and so on.

The storage unit 13 stores in advance a determination threshold when the determination unit 12 determines the usage efficiency level, for example, “usage efficiency 0% to 19% is usage efficiency level 1”. The threshold value is acquired and used to determine the usage efficiency.
The storage unit 13 stores correspondence data between a physical value directly detected by the coil efficiency detection unit 11 and a use efficiency value represented by the physical value, and the coil efficiency detection unit 11 stores each heating coil. This may be used when detecting usage efficiency.

The control unit 5 and each component included in the control unit 5 can be configured by hardware such as a circuit device that realizes the function, or an arithmetic device such as a microcomputer or a CPU (Central Processing Unit), It can also be configured with software that defines the operation.
In addition, the coil efficiency detection unit 11 and the determination unit 12 may be components independent of the control unit 5.

The “load detection unit” in the first embodiment corresponds to the coil efficiency detection unit 11.
The “operation unit” corresponds to the eco mode switch 9.
The “power saving mode” corresponds to the eco mode operation.

Heretofore, the internal configuration of the induction heating cooker 100 according to the first embodiment has been described.
Next, the eco mode operation of the induction heating cooker 100 according to the first embodiment will be described in the following steps (1) to (6).

(1) A user places an object to be heated such as a pan on the top plate 1 and presses the power switch 4 to turn on the induction heating cooker 100. Next, the user operates the operation units 6a to 6d to adjust the heating output. The eco-mode switch 9 is turned off (not pressed).
In addition, the control part 5 sets the operation mode of the induction heating cooking appliance 100 to normal mode.

(2) The coil efficiency detection unit 11 detects the usage efficiency of each heating coil by the above-described method, and outputs the detection result to the determination unit 12. The detection result at that time is stored in a storage device such as a RAM (Random Access Memory) (not shown).
Thereafter, the coil efficiency detection unit 11 performs similar usage efficiency detection, for example, at predetermined time intervals, and outputs the detection result to the determination unit 12 only when the detection result is different from the previous time. You may comprise so that a detection result may be output for every predetermined time interval.

(3) The determination unit 12 receives the detection result of the coil efficiency detection unit 11, acquires the determination threshold described above from the storage unit 13, and based on this, determines the use efficiency level of each energized heating coil. judge. The determination result at that time is stored in a storage device such as a RAM (not shown).
Thereafter, the determination unit 12 performs the same determination at a predetermined time interval, for example, and performs the following process based on the determination result only when the determination result is different from the previous determination. You may comprise so that the following processes may be performed for every predetermined time interval.

(4) Next, the control unit 5 detects the heating coil on which the object to be heated is placed above based on the determination result, and the alternating current is applied only to the heating coil on which the object to be heated is placed. The inverter 3 is drive-controlled so as to supply

(5) The user presses (turns on) the eco mode switch 9. An operation signal to that effect is output from the eco mode switch 9 to the control unit 5. The control unit 5 sets the operation mode of the induction heating cooker 100 to the eco mode.
(6) The control unit 5 acquires the determination result of the determination unit 12 from the above-described RAM or the like. Next, the control unit 5 drives and controls the inverter 3 so as to stop the energization of the heating coils that are energized and whose use efficiency level is less than a predetermined value.

The eco mode operation of the induction heating cooker 100 has been described above.
When the induction heating cooker 100 is performing the eco mode operation, only the heating coil having good use efficiency is energized and used, so that the power use efficiency is increased and the cooking with reduced environmental load can be performed. .

  On the other hand, there are cases where it is desired to prioritize the heating output over the usage efficiency, such as when cooking quickly. In such a case, the user can instruct the induction heating cooker 100 to perform an operation giving priority to heating output (normal mode) only by turning off the eco mode switch 9.

In this regard, in the technique described in Patent Literature 1, when it is desired to prioritize the heating output over the use efficiency, the operation of automatically selecting the heating coil to be energized based on the determination result of the pan determination means 18 is canceled, and manually. The heating coil to be energized must be selected.
In induction heating cooker 100 according to the first embodiment, the user can perform the above-described operation only by turning off eco-mode switch 9, so that the operation burden on the user can be reduced.

In the first embodiment, an example in which a large number of heating coils are arranged as shown in FIG. 1 has been described. However, when a plurality of heating coils are arranged concentrically, for example, only the inner heating coil is energized depending on the usage efficiency. A configuration example such as is also conceivable.
Also in this case, the operation procedure of each component is the same as described above. The same applies to the following embodiments.

As described above, in the induction heating cooker 100 according to the first embodiment, the control unit 5 determines that an AC current is applied only to the heating coil detected by the coil efficiency detection unit 11 when an object to be heated is placed on the upper side. The inverter 3 is driven and controlled so as to supply.
For this reason, only those necessary for cooking by heating are energized among the plurality of heating coils, so that cooking can be performed without consuming unnecessary power.

Further, according to the induction heating cooker 100 according to the first embodiment, the user can operate the induction heating cooker 100 in the eco mode only by turning on the eco mode switch 9, so that the operation burden on the user is reduced. Is reduced.
During the eco mode operation, the determination unit 12 determines a heating coil with good use efficiency based on the detection result of the coil efficiency detection unit 11, and the control unit 5 is an inverter that supplies an alternating current only to the heating coil. 3 is driven and controlled.
Thereby, the electric power usage efficiency of the induction heating cooking appliance 100 increases, and the heating cooking which suppressed environmental load can be performed.

  Further, according to the induction heating cooker 100 according to the first embodiment, when priority is given to the heating output over the use efficiency, it is only necessary to turn off the eco-mode switch 9, thereby reducing the operation load on the user. can do.

Embodiment 2. FIG.
In the first embodiment, the eco-mode switch 9 is used to switch the eco-mode operation ON / OFF, and the induction heating cooker that can easily switch between the use efficiency and the heating output with priority given to cooking. 100 configurations and operations have been described.
In Embodiment 2 of the present invention, a configuration will be described in which the user can set the degree of emphasis on usage efficiency during the eco mode operation.

FIG. 4 is a diagram illustrating an example of operation means for setting the degree of emphasis on usage efficiency during the eco mode operation.
The induction heating cooker 100 according to the second embodiment is newly provided with an eco level adjustment unit 10 in addition to the configuration described in the first embodiment. Since other configurations are substantially the same as those of the first embodiment, the description will focus on the differences, and other descriptions will be omitted.

The eco-level adjusting unit 10 is configured by a slide bar that can be slid left and right. The eco-level adjusting unit 10 is configured to designate importance on use efficiency when it is slid to the right, and to designate non-importance on use efficiency as it is slid to the left.
Hereinafter, the relationship between the degree of emphasizing usage efficiency and the setting contents of the eco level adjustment unit 10 will be described with reference to FIG.

FIG. 4A is a diagram illustrating an energization state of the heating coil when the eco level adjusting unit 10 is slid to the rightmost.
When the eco-level adjusting unit 10 is slid to the right, it is designated that importance is placed on the usage efficiency, so that only the heating coil with good usage efficiency is energized. In the example of FIG. 4A, only the heating coil whose upper surface is entirely covered with the object to be heated is energized.

FIG. 4B is a diagram showing the energization state of the heating coil when the eco level adjusting unit 10 is slid slightly to the left and set to about the center of FIG. 4A.
If the eco-level adjusting unit 10 is set to about the center, even a heating coil with poor usage efficiency is energized. In the example of FIG. 4B, all the heating coils in which about two-thirds or more of the upper surface is covered with the object to be heated are energized.

FIG. 4C is a diagram showing the energization state of the heating coil when the eco level adjusting unit 10 is slid to the leftmost.
When the eco-level adjusting unit 10 is slid to the leftmost, it is designated that the specific gravity that places more emphasis on the heating output than the usage efficiency is specified, so that the heating coil with low usage efficiency is also energized. In the example of FIG. 4C, all the heating coils in which about one-half or more of the upper surface is covered with the object to be heated are energized.

  The “operation unit” in the second embodiment corresponds to the eco mode switch 9 and the eco level adjustment unit 10.

  Next, the internal operation of the induction heating cooker 100 when the user slides the eco level adjusting unit 10 will be described in the following steps (7) to (9).

(7) By the operation described in the steps (1) to (6) of the first embodiment, the induction heating cooker 100 starts the eco mode operation.
(8) When the user slides the eco level adjustment unit 10, an operation signal corresponding to the set position is output to the control unit 5.
(9) The control part 5 updates the determination threshold value when the determination part 12 determines the use efficiency level of a heating coil corresponding to the operation signal received at step (8).

(9.1) When the eco level adjusting unit 10 is slid to the right The control unit 5 corrects the determination threshold upward so that the number of energized heating coils decreases.
Thereby, since the threshold value when the determination part 12 determines a use efficiency level becomes high, the number of the heating coils determined that the use efficiency is good decreases, and the energization control which attaches importance to the use efficiency is performed.

(9.2) When the eco level adjustment unit 10 is slid to the left The control unit 5 corrects the determination threshold value downward so that more heating coils are energized.
As a result, the threshold when the determination unit 12 determines the usage efficiency level is lowered, so that the number of heating coils that are determined to have good usage efficiency increases, and energization control is performed with an increased ratio of emphasizing the heating output. Is called.

  The internal operation of the induction heating cooker 100 when the user slides the eco level adjustment unit 10 has been described above.

FIG. 5 is a diagram illustrating another configuration example of the eco level adjustment unit 10.
In FIG. 4, an example has been described in which the eco level adjustment unit 10 is provided separately from the eco mode switch 9 and the eco level adjustment unit 10 is operated after the eco mode switch 9 is turned on.
Apart from this, it is also possible to configure so that the eco-mode ON / OFF can be set only by the eco-level adjusting unit 10.
For example, as shown in FIG. 5D, it is conceivable that the eco-level adjustment unit 10 is configured to be turned off when the eco-level adjustment unit 10 is slid to the leftmost.

As described above, the induction heating cooker 100 according to the second embodiment includes the eco level adjustment unit 10, and the user can set the degree of emphasizing the use efficiency during the eco mode operation.
This makes it possible to set in more detail the specific gravity of whether to focus on usage efficiency or heating output, making it easier to reflect the actual cooking environment or the like in cooking, which increases convenience for the user. .

Embodiment 3 FIG.
In the first and second embodiments, the configuration that determines the heating coil to be energized based on the detection result of the coil efficiency detection unit 11 has been described.
On the other hand, for example, when the shape of the object to be heated is special or the size is small, it is clear from the beginning that the heating coil cannot be used efficiently. Then, there is a possibility that proper heating cannot be performed.
Therefore, in Embodiment 3 of the present invention, a configuration will be described in which whether or not to determine the use efficiency is determined depending on the shape and size of the object to be heated.

FIG. 6 is a diagram showing the heating efficiency when the shape and size of the object to be heated are special.
The left part of Fig.6 (a) has shown the example whose to-be-heated material is an ellipse. When the object to be heated is elliptical, a portion where the upper surface of the circular heating coil protrudes from the bottom surface of the object to be heated tends to occur.
When placing such an object to be heated, it is clear from the beginning that it is difficult to use the heating coil completely efficiently. When the eco mode is strictly applied, the heating coil is not energized and cooked. Can not be. Therefore, it is not appropriate to control energization / non-energization of the heating coil based on the use efficiency.

  On the other hand, the right part of FIG. 6A shows an example in which the object to be heated is circular. When the object to be heated is circular, the heating coil is likely to be covered with the bottom surface of the object to be heated, and even if the eco mode is applied, it is considered that one of the heating coils is often energized.

FIG. 6B shows an example in which the size of the object to be heated is small. When the size of the object to be heated is small (for example, smaller than the upper surface of the heating coil), heating waste is almost certainly generated regardless of where the object to be heated is placed. Even if the size of the object to be heated is larger than the upper surface of the heating coil, the same situation is likely to occur if there is not enough size to cover all the heating coils.
Also in this case, similarly to FIG. 6A, it is not appropriate to control energization / non-energization of the heating coil based on the use efficiency.

  Thus, depending on the shape and size of the object to be heated, it may be preferable from the viewpoint of usability not to determine the usage efficiency of the heating coil.

FIG. 7 is a functional block diagram of induction heating cooker 100 according to the third embodiment.
In FIG. 7, in addition to the configuration described in FIG. 3 of the first embodiment, a shape detection unit 15 is newly provided. Others are substantially the same as those in the first and second embodiments, and therefore, the description will be focused on the difference, and the other description will be omitted.

  The storage unit 13 stores shape data of an object to be heated so that energization / non-energization control based on use efficiency is not performed. The shape data is heated to such an extent that the determination unit 12 can determine whether to control energization / non-energization, such as feature point data obtained by extracting feature points of the object to be heated, and vertical and horizontal dimensions of a six-view drawing. Any format that can express the shape and size of an object may be used.

The shape detection unit 15 is configured by arranging imaging means such as a camera in a range hood or the like, for example, images the object to be heated placed on the top plate 1, and outputs the image data to the determination unit 12. To do.
The determination unit 12 receives the image data of the object to be heated from the shape detection unit 15, and uses the same method as the shape data stored in the storage unit 13 such as extraction of feature points and size determination, Determine the size.

When the determination unit 12 determines the shape and size of the object to be heated, the determination unit 12 searches the storage unit 13 for shape data that matches the shape and size.
If there is matching shape data, the use efficiency level of the object to be heated is not determined regardless of whether the eco mode is on or off, and the energization / non-energization control based on the use efficiency is not performed. .
If there is no matching shape data, the same operation as in the first and second embodiments is performed.

  In addition, about the shape data of the to-be-heated object which the said memory | storage part 13 stores, you may make it a user specify and input using operation part 6a-6b or another operation input means. Specifically, for example, the following method can be considered. The content input by the user is received by the control unit 5 and the shape data corresponding to the storage unit 13 is stored.

(1) Allow the user to input a trajectory on the touch panel on the shape and size of the object to be heated for which usage efficiency is not determined.
(2) Let the user select the shape and size of the object to be heated from which the usage efficiency is not determined from a specified list.
(3) Allow the user to enter numerical values for the dimensions of the object to be heated for which usage efficiency is not determined.

  The “second operation unit” according to the third embodiment corresponds to the operation units 6 a to 6 b and other operation input means on which the user performs designation input.

As described above, according to the third embodiment, the shape data of an object to be heated, which is known to cause heating waste in the heating coil, is stored in advance in the storage unit 13 and is imaged by the shape detection unit 15. When the shape and size of the object to be heated matched this, the energization / non-energization control based on the usage efficiency was not performed.
Thereby, there is an effect that the heating coil is not improperly de-energized and the user's feeling of use is not impaired.

It is a block diagram of the induction heating cooking appliance 100 which concerns on Embodiment 1. FIG. It is a figure explaining eco-mode. It is a functional block diagram of the induction heating cooker 100. It is a figure which shows the example of an operation means for setting the grade which attaches importance to use efficiency at the time of eco mode operation | movement. FIG. 6 is a diagram illustrating another configuration example of the eco level adjustment unit 10. It is a figure which shows the heating efficiency in case the shape and magnitude | size of a to-be-heated object are special. It is a functional block diagram of the induction heating cooking appliance 100 which concerns on Embodiment 3. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Top plate, 2 Main body housing, 3 Inverter, 4 Power switch, 5 Control part, 6a-6d Operation part, 7 Display part, 8a-8t Heating coil, 11 Coil efficiency detection part, 12 Judgment part, 13 Memory | storage part, 15 shape detection unit, 100 induction heating cooker.

Claims (6)

A plurality of heating coils for heating an object to be heated;
An inverter for supplying an alternating current to the heating coil;
A control unit that drives and controls the inverter;
A load detection unit for detecting that an object to be heated is placed above the heating coil;
An operation unit that receives an operation input to operate the inverter in a predetermined power saving mode and outputs an operation signal to that effect to the control unit;
With
The load detector is
Detecting for each heating coil that an object to be heated is placed above the heating coil;
The controller is
While controlling the inverter to supply an alternating current to the heating coil detected by the load detection unit that the object to be heated is placed above,
Control the inverter not to supply an alternating current to the other heating coils,
When receiving the operation signal from the operation unit,
The induction heating cooker, wherein the inverter is driven and controlled so that an alternating current is not supplied to the heating coil having a usage efficiency less than a predetermined level. A coil efficiency detector for detecting the use efficiency of each heating coil;
A determination unit that determines a use efficiency level for each of the heating coils based on a detection result of the coil efficiency detection unit and a predetermined determination threshold, and outputs a determination result to the control unit;
With
The controller is
When operating the inverter in the power saving mode, the heating coil that has received the determination result that the use efficiency level is less than a predetermined value from the determination unit,
The induction heating cooker according to claim 1, wherein the inverter is driven and controlled so as not to supply an alternating current. The operation unit is
Accepting an operation input specifying a power saving level when operating the inverter in the power saving mode, and outputting an operation signal corresponding to the power saving level,
The controller is
When receiving the operation signal from the operation unit,
The induction heating cooker according to claim 2, wherein the place determination threshold value is varied in accordance with a power saving level represented by the operation signal. Comprising a shape detecting means for detecting at least one of the shape or size of the object to be heated;
The determination unit
Whether the shape of the heated object detected by the shape detection means is a predetermined shape,
Or
When the size of the object to be heated detected by the shape detection means is a predetermined value or less,
The induction heating cooker according to claim 2 or 3, wherein a determination result of a use efficiency level of the heating coil is not output. The determination unit includes a second operation unit for designating and inputting the shape or size of the object to be heated that does not output the determination result of the use efficiency level of the heating coil,
The determination unit
For the object to be heated having a shape or size for which there has been a designation input that the determination result of the use efficiency level of the heating coil is not output from the second operation unit,
The induction heating cooker according to claim 4, wherein a determination result of a use efficiency level of the heating coil is not output. Each heating coil is placed close together,
The induction heating cooker according to any one of claims 1 to 5, wherein regions where the object to be heated can be heated by the heating coils are connected to each other.

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