JP2013161679A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heating cooker which can improve workability of cooking when heating an object to be heated having a grip.SOLUTION: Heating means has a central heating coil 12 and a peripheral heating coil 11c arranged on a near side of the central heating coil 12, and a plurality of operation keys composing an operation part 40a is arranged so as to avoid a position on a near side extension line of a straight line (A-C) combining a center (A) of the central heating coil 12 and a center (C) of the peripheral heating coil 11c and to be separated to left and right both sides on the near side extension line of the straight line (A-C).

Description

  The present invention relates to a heating cooker.

  In a conventional induction heating cooker, “a central coil wound in a planar shape, a plurality of peripheral coils disposed around the central coil, and a high frequency independently for each of the central coil and the peripheral coil. A plurality of power supply circuit units for supplying current; a detecting means for detecting a state in which the heated body is placed above the central coil and the peripheral coils; and the heated body detected by the detecting means And a drive control unit that controls the power supply circuit unit so that a high-frequency current is selectively supplied to each of the central coil and the peripheral coil according to the mounting state has been proposed ( For example, see Patent Document 1).

WO 2010/101202 (page 3 to page 7, FIG. 3)

  In the induction heating cooker described in Patent Document 1, when a user places an object to be heated having a handle on the heating port, the handle of the object to be heated may interfere with the operation unit and workability may be reduced. However, Cited Document 1 does not describe a configuration for suppressing interference with the operation unit.

  The present invention has been made against the background of the above problems, and provides a cooking device capable of improving the workability of cooking when heating an object to be heated having a handle.

  A heating cooker according to the present invention includes a top plate on which an object to be heated is placed, a heating unit that is disposed below the top plate in correspondence with a heating port, and heats the object to be heated, and an operation setting. An input device including a plurality of operation units for inputting, and a control unit for driving and controlling the heating unit, the heating unit being a central heating unit and a first disposed on the front side of the central heating unit A plurality of operating portions on an extension on the near side of a straight line (AC) connecting the center (A) of the central heating portion and the center (C) of the first peripheral heating portion. In order to avoid this, they are arranged separately on the left and right sides of the straight line (AC) on the near side extension line.

  In the heating cooker according to the present invention, when the handle of the object to be heated is placed along a straight line connecting the centers of the first peripheral heating unit and the second peripheral heating unit, the handle of the object to be heated is placed on the operation unit. The cooking workability can be improved without interference.

It is a disassembled perspective view which shows the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a top view which shows the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a top view explaining arrangement | positioning of the heating coil of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is explanatory drawing which shows the use condition of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a top view explaining the arrangement | positioning and example of a drive state of the heating coil of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a block diagram explaining the operation example of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is explanatory drawing which shows the use condition of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a top view explaining the arrangement | positioning and example of a drive state of the heating coil of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a block diagram explaining the operation example of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is explanatory drawing which shows the use condition of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a top view explaining the arrangement | positioning and example of a drive state of the heating coil of the induction heating cooking appliance which concerns on Embodiment 1. FIG. It is a block diagram explaining the operation example of the induction heating cooking appliance which concerns on Embodiment 1. FIG.

Embodiment 1 FIG.
In the first embodiment, the cooking device according to the present invention is a built-in type (built-in type) IH cooking heater (induction heating) in which a cooking pan mounting portion by induction heating is provided in two mouths on the left and right sides and one mouth in the center back side. A case where it is applied to a cooking device will be described as an example. In addition, this invention is not limited by the form of drawing shown below.

(overall structure)
1 is an exploded perspective view showing an induction heating cooker according to Embodiment 1. FIG.
FIG. 2 is a plan view showing the induction heating cooker according to the first embodiment.
In the following description, terminology (for example, “up”, “down”, “right”, “left”, “front”, “rear”, etc.) is used as appropriate to facilitate understanding. This is for explanation and these terms do not limit the present invention.
As shown in FIGS. 1 and 2, a top plate on which an object to be heated 5 such as a pan (sometimes referred to as the object to be heated 5 a, 5 b) is placed on the top of the induction heating cooker 100. 4. The top plate 4 includes a first heating port 1, a second heating port 2, and a third heating port 3 as heating ports for induction heating of the object to be heated 5, corresponding to each heating port, One heating means 10, second heating means 20, and third heating means 30 are provided, and the object to be heated 5 can be placed on each heating port and heated.
In the first embodiment, the first heating means 10 and the second heating means 20 are provided side by side on the front side of the main body, and the third heating means 30 is provided substantially at the center on the back side of the main body.
In addition, arrangement | positioning of each heating port is not restricted to this. For example, three heating ports may be arranged side by side in a substantially straight line. Moreover, you may arrange | position so that the position of the depth direction of the center of the 1st heating means 10 and the center of the 2nd heating means 20 may differ.

  The top plate 4 is entirely made of a material that transmits infrared rays, such as heat-resistant tempered glass or crystallized glass, and a rubber packing or sealing material is interposed between the upper surface and the outer periphery of the upper surface of the induction heating cooker 100 main body. Fixed in a watertight state. The top plate 4 has a circular pan position display indicating a rough placement position of the pan corresponding to the heating range (heating port) of the first heating unit 10, the second heating unit 20 and the third heating unit 30. It is formed by applying paint or printing.

  On the near side of the top plate 4, as an input device for setting the heating power and cooking menu when heating the article 5 to be heated by the first heating means 10, the second heating means 20, and the third heating means 30, An operation unit 40a having a plurality of operation keys, an operation unit 40b, and an operation unit 40c (hereinafter may be collectively referred to as the operation unit 40) are provided. Further, in the vicinity of the operation unit 40, display units 41a, 41b, and 41c (hereinafter referred to as display units) that display the operation state of the induction heating cooker 100, input / operation contents from the operation unit 40, and the like. , And may be collectively referred to as the display unit 41). The display unit 41 includes a plurality of display elements configured by, for example, LEDs or a liquid crystal display device. Depending on each or a combination of these display elements, a current thermal power, a set temperature, a detected temperature, a warning display such as a high temperature warning, a setting menu, and the like are displayed. Note that the operation units 40a to 40c and the display units 41a to 41c may be provided for each heating port, or may be provided with the operation unit 40 and the display unit 41 that collect all the heating ports, and are not particularly limited. Absent.

The operation unit 40a according to the first embodiment corresponds to the input device of the present invention.
The operation keys of the first embodiment correspond to the operation unit of the present invention.
The display unit 41a according to the first embodiment corresponds to the display device of the present invention.
Moreover, the display element of this Embodiment 1 is equivalent to the display part of this invention.
Moreover, the center heating coil 12 of this Embodiment 1 is corresponded to the center heating part of this invention.

  Below the top plate 4 and inside the main body, heating coils are provided corresponding to the first heating means 10, the second heating means 20, and the third heating means 30, respectively. In the first embodiment, the first heating means 10 and the second heating means 20 are constituted by a plurality of heating coils, and the third heating means 30 is constituted by one heating coil. Details of the configuration of the heating coil will be described later.

  The main body of the induction heating cooker 100 includes a drive circuit 50 for supplying high-frequency power to the heating coils of the first heating means 10, the second heating means 20, and the third heating means 30, and the drive circuit 50. A control unit 45 for controlling the operation of the whole heating cooker and a load detection means 60 for detecting the placement state of the object to be heated 5 are provided.

(Configuration of heating coil)
FIG. 3 is a plan view for explaining the arrangement of the heating coils of the induction heating cooker according to the first embodiment. In addition, in FIG. 3, the state which removed the top plate 4 of the induction heating cooking appliance 100 is represented.

The first heating means 10 is arranged around two central heating coils 12a and 12b (which may be collectively referred to as the central heating coil 12), which are arranged substantially concentrically at the center, and the central heating coils 12a and 12b. In addition, it is composed of four peripheral heating coils 11 (sometimes referred to as peripheral heating coils 11a, 11b, 11c, and 11d), and the outer periphery of the first heating means 10 is substantially circular. Here, the two central heating coils 12a and 12b are described as being driven and controlled independently. However, the central heating coils 12a and 12b may be connected in series, or may be a single unit instead of a double ring. The structure of one heating coil (not shown) may be sufficient.
In the following description, the central heating coils 12a and 12b and the peripheral heating coils 11a to 11d may be collectively referred to as “heating coils”.

  The center heating coils 12a and 12b have a circular planar shape, and are configured by winding conductive wires made of an arbitrary metal (for example, copper, aluminum, etc.) coated with an insulating film in the circumferential direction.

  Further, the four peripheral heating coils 11a to 11d have a substantially ¼ arc shape (banana shape or pepper shape) planar shape, and conductive wires are connected to the respective peripheral heating coils in the same manner as the central heating coils 12a and 12b. It is formed by winding along a quarter arc shape of 11a to 11d. That is, the peripheral heating coils 11a to 11d are configured to extend substantially along the circular planar shape of the central heating coil 12b in a ¼ arc-shaped region adjacent to the central heating coil 12b on the outer peripheral side. . The number of the peripheral heating coils 11 is not limited to four, but may be an odd number (for example, five).

The 2nd heating means 20 is comprised from the two heating coils 21a and 21b arrange | positioned on the substantially concentric circle. As with the first heating means 10, the two heating coils 21a and 21b may be independently drive-controllable, may be connected in series, or may be a single heating coil ( You may comprise the 2nd heating means 20 by not shown.
The third heating means 30 is composed of a substantially circular heating coil 31. However, the present invention is not limited to this, and a plurality of heating coils may be arranged concentrically.

Next, the arrangement of the peripheral heating coil 11 will be further described.
In FIG. 3, when the center of the first heating means 10 is a point A, the central heating coil 12 is provided so that the center thereof coincides with the point A.

Further, a straight line X extending in the depth direction of the top plate 4 so as to pass through the point A so as to be orthogonal to the width direction of the top plate 4 and a straight line Y passing through the point A and inclined by the angle α with respect to the straight line X. Assuming that the peripheral heating coil 11 c is located on the straight line Y and centered on a point C on the near side of the central heating coil 12. That is, the peripheral heating coil 11 c is arranged on the near side of the central heating coil 12 with the point on the straight line Y as the center. A straight line connecting the centers (point A, point C) of these heating coils coincides with the straight line Y.
The peripheral heating coil 11c according to the first embodiment corresponds to the first peripheral heating unit of the present invention.

In the first embodiment, the peripheral heating coil 11b and the peripheral heating coil 11d are opposed to each other around the point A in the circumferential gap between the peripheral heating coil 11a and the peripheral heating coil 11c on the outer peripheral side of the central heating coil 12. Has been.
In the first embodiment, the peripheral heating coils 11a to 11d have substantially the same shape and are arranged uniformly in the circumferential direction. That is, the peripheral heating coil 11b is disposed at a position obtained by rotating the peripheral heating coil 11a by 90 degrees clockwise around the point A. Further, the peripheral heating coil 11d is arranged at a position where the peripheral heating coil 11c is rotated 90 degrees clockwise around the point A.
Note that the peripheral heating coils 11a, 11b, and 11d of the first embodiment correspond to the second peripheral heating unit of the present invention.

  Further, on the extended line that extends the straight line connecting the center A of the central heating coil 12 and the center C of the peripheral heating coil 11c to the near side (point C side) of the top plate 4, the operation keys of the operation unit 40a and The display element which comprises the display part 41a is not arrange | positioned. That is, the operation keys of the operation unit 40a and the display elements of the display unit 41a are arranged separately on the left and right sides of the straight line Y at positions avoiding the extended line obtained by extending the straight line Y toward the front side of the top plate 4.

  FIG. 4 is an explanatory diagram showing a use state of the induction heating cooker according to the first embodiment. FIG. 4 shows a schematic diagram in which the user 90 is heating the substantially rectangular heated object 5 a having a handle (for example, an egg-frying frying pan) by the first heating means 10. In general, since the user 90 performs cooking while standing on the near side of the induction heating cooker 100, that is, on the side close to the operation unit 40a, the handle of the heated object 5a is arranged in the direction of the operation unit 40a. Become. That is, when the induction heating cooker 100 is viewed in plan as shown in FIG. 4, when the handle 5a has a long handle, the handle 5a extends to the near side of the top 4 and the operation unit 40a. Or may be used in a state of reaching the upper portion of the display unit 41a.

(Operation)
Next, a specific operation will be described with reference to FIGS.
FIG. 5 is a plan view for explaining an arrangement of heating coils and an example of a driving state of the induction heating cooker according to the first embodiment.
FIG. 6 is a block diagram illustrating an operation example of the induction heating cooker according to the first embodiment.
In FIG. 5, the hatched heating coils are in a driving state, and the other heating coils are in a stopped state. Moreover, in FIG. 6, it has shown that the heating coil enclosed with the thick line is a drive state, and a heating coil other than that is a stop state. The same applies to the drawings described below.

  As shown in FIG. 6, the drive circuit 50 according to the first embodiment includes a drive circuit 50a for energizing the central heating coil 12a, a drive circuit 50b for energizing the central heating coil 12b, and a drive for energizing the peripheral heating coil 11a. The circuit 50c includes a drive circuit 50d for energizing the peripheral heating coil 11b, a drive circuit 50e for energizing the peripheral heating coil 11c, and a drive circuit 50f for energizing the peripheral heating coil 11d. By supplying high frequency power to each heating coil individually by each drive circuit 50, induction heating operation by each heating coil is performed.

Each drive circuit 50 is configured by a full-bridge or half-bridge inverter circuit, and supplies high-frequency power to the heating coil by an on / off operation of the switching element based on a drive signal from the control unit 45.
The controller 45 controls the input power to the object to be heated 5 by changing the drive frequency, the duty (on / off ratio), or both of the drive circuits 50. The control unit 45 is configured to be able to individually control the plurality of drive circuits 50, and can supply high-frequency power to the heating coil under an arbitrary drive condition.

  The load detection means 60 detects the heating coil on which the article to be heated 5 is placed. When an instruction to start heating (introduction of thermal power) is given from the user 90 to the operation unit 40a, the control unit 45 drives the drive circuits 50a to 50f in the load detection operation mode before the heating start operation, thereby detecting the load. The means 60 performs a load detection operation for detecting whether or not a load (object to be heated 5) is placed on each heating coil.

  As a specific configuration of the load detection means 60, for example, a current detection circuit for detecting the amount of current flowing through each heating coil can be provided. In general, the impedance of the heating coil varies depending on the presence / absence, size (mounting area), and material of the object to be heated 5 placed above the heating coil, and the drive circuit 50 is configured accordingly. The amount of current flowing through the inverter circuit that changes also changes. Therefore, the impedance value of each heating coil is detected by detecting the amount of current flowing through each heating coil, and thereby the mounted state of the article to be heated 5 on each heating coil can be determined. The specific configuration of the load detection means 60 is not limited to this. For example, a weight sensor is provided corresponding to each of the central heating coil 12 and each peripheral heating coil 11, and whether or not an object to be heated is placed above each heating coil based on the detection value of each weight sensor. Can also be detected. Further, for example, in correspondence with each of the central heating coil 12 and each peripheral heating coil 11, a light projecting unit that emits light upward, and a light emitted from the light projecting unit and placed on the top plate 4. An optical sensor provided with a light receiving unit capable of receiving light reflected from the bottom surface of the object to be heated 5 is provided above each heating coil depending on whether the light receiving unit can receive light from the light projecting unit. It is also possible to detect whether the object to be heated 5 is placed.

  The control unit 45 determines the drive state of the drive circuits 50 a to 50 f based on the load detection result by the load detection unit 60. In response to the output of the load detection means 60, the heating coil drive circuit 50 on which the object to be heated 5a is placed is operated, and the heating coil drive circuit on which the object to be heated 5a is not placed on the upper side. 50 is controlled by the control unit 45 so as to be stopped or lowered, thereby obtaining an induction heating cooker with high efficiency and low heat generation that suppresses energization to the heating coil that is not necessary for heating the article to be heated 5a. it can.

  The number of drive circuits 50a to 50f is not limited to this, and drive circuits may be provided so as to energize a predetermined combination of heating coils.

  Next, the operation and action of the induction heating cooker 100 according to Embodiment 1 will be described together with a specific example of the article to be heated 5.

(1) When a substantially rectangular object to be heated having a handle is placed Induction heating when the user 90 cooks using a to-be-heated object 5a having a handle such as an egg-baking frying pan. The operation and action of the cooking device 100 will be described with reference to FIGS. 4, 5, and 6.
As shown in FIG. 5, when the substantially rectangular heated object 5a shown by the broken line is placed on the first heating means 10, in order to heat the heated object 5a more efficiently, The heating coil mounted on the upper side (the central heating coils 12a and 12b and the peripheral heating coils 11a and 11c shown by hatching in FIG. 5) is driven, and the object to be heated 5a is not mounted on the upper side and is heated. It is desirable to stop the heating coils (peripheral heating coils 11b and 11d in FIG. 5) that do not contribute to the heating of the object 5a.

  In this Embodiment 1, as shown in FIG. 6, the load detection means 60 detects the mounting state of the heated object 5a, and the control unit 45 places the heated object 5a on the upper side of each heating coil. Only the heating coil that is detected to be energized is energized. When the object to be heated 5a is placed as shown in FIG. 5, the control unit 45 controls to energize only the central heating coils 12a and 12b and the peripheral heating coils 11a and 11c indicated by bold lines in FIG. For this reason, the induction heating cooking appliance 100 with high efficiency and little heat generation can be obtained.

Here, the angle (direction) for placing the article to be heated 5a will be described.
For example, when the user 90 cooks the induction heating cooker 100 facing the induction heating cooker 100 using the heated object 5a having a handle such as a frying pan, the user 90 holds the handle of the heated object 5a with one hand. In relation to this, it is a natural operation to place the tilting unit with respect to the front direction of the induction heating cooker 100. That is, from the viewpoint of ergonomics, it is preferable that cooking can be appropriately performed in a state where the handle of the object to be heated 5a is arranged to the left or right with respect to the front direction of the induction heating cooker 100.

In the first embodiment, a straight line X passing through the center A of the central heating coil 12 and extending from the front side of the main body of the induction heating cooker 100 toward the back side so as to be orthogonal to the top plate 4 and the central heating coil 12. An angle α formed by the center A and a straight line passing through the center C of the peripheral heating coil 11c is set to a value of approximately 5 degrees ≦ α approximately ≦ 20 degrees.
By setting α in this way, when the user 90 places the handle of the object to be heated 5a facing the induction heating cooker 100 and puts it on the heating port with a natural motion, it is approximately rectangular. It is possible to increase the possibility that the object to be heated 5a is placed on the upper side of the peripheral heating coils 11a and 11c and not placed on the upper side of the peripheral heating coils 11b and 11d.

  As described above, the load detection means 60 detects the mounting state of the object to be heated 5a and controls the energization of the heating coil. However, the object to be heated 5a is mounted on the peripheral heating coils 11b and 11d. When it is detected by the load detection means 60, the controller 45 drives the drive circuits 50d and 50f to energize the peripheral heating coils 11b and 11d. For this reason, when only a small part of the object to be heated 5a is placed on the upper side of the peripheral heating coils 11b and 11d, the heating coil that does not contribute much to the heating of the object to be heated 5a is energized, and the loss is reduced. There is a problem of an increased induction heating cooker with low efficiency.

  In the first embodiment, by setting α to a value of approximately 5 degrees or more and 20 degrees or less, when the user 90 cooks facing the induction heating cooker 100, cooking operability from the viewpoint of ergonomics. In a state where the handle of the heated object 5a is arranged at a good position, the substantially rectangular heated object 5a is positioned above the peripheral heating coils 11a and 11b. For this reason, when placing the object 5a to be heated, an unnatural operation is not required for the user 90, and the cooking workability of the user 90 is not impaired, and efficient heating can be performed.

  As shown in FIG. 5, in the present embodiment, the operation keys of the operation unit 40a are divided into two, and the operation keys are arranged so as to be divided into left and right so as to avoid the extension line of the straight line AC. That is, when the induction heating cooker 100 is viewed in plan, the operation key 40a and the handle of the object to be heated 5a do not overlap even when the object to be heated 5a indicated by the broken line is placed. The operation keys can be visually observed.

  In the course of the cooking operation, the user 90 may perform operations such as adjustment of the heating power increase / decrease of the first heating means 10, adjustment of the heating power input time, and instruction to stop the heating power input when the cooking operation is completed. This is done by operating the operation keys of the unit 40a.

  If the handle of the object to be heated 5a and the operation key of the operation unit 40a overlap with each other in a state where the induction heating cooker 100 is viewed in plan, it becomes difficult to operate the operation key during various operations, and the workability of the operation is improved. Although it will deteriorate, the operation key of the operation unit 40a is divided into the left and right parts while avoiding the extension line of the straight line A-C, so that the operability of the operation unit 40a is improved and the cooking workability is improved. The induction heating cooker 100 can be obtained.

  In the present embodiment, the operation key of the operation unit 40a is divided and the operation key is not arranged on the extension line of the line A-C. However, the operation key that is not operated much during the cooking operation, for example, fried food An operation key for setting a cooking mode such as cooking or stewed cooking at the beginning of cooking, an operation key for preheating a heated object at the start of cooking, or the like may be arranged on the extension line of the line A-C. Thus, it is possible to suppress a reduction in cooking workability while securing an installation space for the operation unit.

  In addition, the operation keys for adjusting the thermal power, the operation keys for starting the heating power, and the operation keys for stopping the heating power are arranged on the right side on the extension line of the line A-C. Is preferred. By doing so, for example, even when the user 90 operates the operation keys with the right hand while holding the handle of the heated object 5a with the left hand, the operation keys are easy to see and operate. An induction heating cooker 100 that is more convenient to use can be obtained.

  Further, in the present embodiment, the operation key of the operation unit 40a is divided and arranged on both sides on the extension line of the straight line AC, and the display unit 41a for displaying the input / operation content from the operation unit 40a is also a straight line. In order to avoid the extension line A-C, that is, the handle of the article 5a to be heated, it is divided into left and right parts.

  As with the operation keys of the operation unit 40a, when the display unit 41a overlaps the handle of the object to be heated 5a, it becomes difficult to see the display of the input content, operation content, etc. If the warning display becomes difficult to see, there is a problem that usability deteriorates from the viewpoint of safety. In this Embodiment 1, since the display element of the display part 41a was divided | segmented into right and left avoiding the extension line | wire of straight line AC, it is easy to see the input and operation content etc., and the induction heating cooking appliance 100 which is easy to use is obtained. be able to.

  Further, since the user 90 often performs cooking while standing on the right side with respect to the handle of the object to be heated 5a, the warning display is displayed on the extension line of the straight line AC in the display unit 41a (the pattern of the object to be heated 5a). ) On the right side. By doing in this way, when the user 90 is standing on the right side with respect to the handle of the object to be heated 5a, the warning display unit 41a is easy to see from the user 90, so that the safety is higher and the usability is higher. An induction heating cooker 100 with good quality can be obtained.

(2) When a substantially rectangular heated object having a handle and a small depth dimension is placed A user using a substantially rectangular heated object 5b having a smaller depth dimension than the heated object 5a illustrated in FIG. The operation and action of the induction heating cooker 100 when 90 performs cooking will be described with reference to FIGS. 7, 8, and 9.
FIG. 7 is an explanatory diagram showing a use state of the induction heating cooker according to the first embodiment. FIG. 7 shows a schematic diagram using a substantially rectangular heated object 5b having a small depth dimension (vertical dimension in the drawing) with respect to the rectangular heated object 5a shown in FIG.
FIG. 8 is a plan view for explaining an arrangement of heating coils and an example of a driving state of the induction heating cooker according to the first embodiment.
FIG. 9 is a block diagram illustrating an operation example of the induction heating cooker according to the first embodiment.

  When an instruction to start heating from the user 90 is given to the operation unit 40a, a load detection operation for detecting the placement state of the article to be heated 5b is performed by the load detection means 60. As shown in FIG. 8, when the substantially rectangular object 5b indicated by the broken line is placed on the first heating means 10, the central heating coils 12a and 12b and the peripheral heating coil 11c indicated by the oblique lines are energized. Induction heating cooking with high efficiency and less heat generation by stopping the energization of the heating coil that is not necessary for heating the object to be heated 5b by controlling the energization so that the peripheral heating coils 11a, 11b, 11d are stopped. A vessel 100 can be obtained.

  Even when the substantially rectangular heated object 5b having the handle shown in FIGS. 7 and 8 is placed, the user 90 can naturally move the object 90 as in the heated object 5a shown in FIGS. When the heated object 5b is placed, the handle of the object to be heated 5b does not interfere with the operation unit 40a or the display unit 41b. For this reason, it is possible to obtain an induction heating cooker 100 that has good operability and is easy to use and that allows easy viewing of input / operation contents.

(3) When two objects to be heated are placed The object to be heated 5c and the object to be heated 5d are respectively placed on the two heating ports, and the user 90 cooks using the two objects to be heated at the same time. The operation when performed will be described.
FIG. 10 is an explanatory diagram showing a usage state of the induction heating cooker 100 according to the first embodiment.
FIG. 11 is a plan view for explaining an arrangement of heating coils and an example of a driving state of the induction heating cooker according to the first embodiment.
FIG. 12 is a block diagram illustrating an operation example of the induction heating cooker according to the first embodiment.

  As shown in FIG. 10, an object to be heated 5c having an elliptical shape (oval shape) is placed on the upper side of the first heating means 10, and this object to be heated 5c (for example, an elliptical two-handed pan) Handles are provided at both ends of the long side of the ellipse. A heated object 5d (for example, a circular frying pan) having a circular outer shape is placed on the upper side of the second heating means 20. And it shall be set with respect to the operation part 40 so that the to-be-heated material 5c and the to-be-heated material 5d may be induction-heated simultaneously.

  Next, operation | movement of the 1st heating means 10 of the induction heating cooking appliance 100 is demonstrated with reference to FIG. When an instruction to start heating from the user 90 is given to the operation unit 40a, a load detection operation for detecting the placement state of the article to be heated 5c is performed by the load detection means 60. As shown in FIG. 12, when the elliptical object 5c indicated by the broken line is placed on the first heating means 10, the central heating coils 12a and 12b and the peripheral heating coils 11b and 11d indicated by the oblique lines are energized. Thus, the control circuit 45 controls the drive circuit 50.

  In addition, an object to be heated 5d is placed on the second heating means 20, and a drive circuit (not shown) is also controlled by the control unit 45 in the heating coil constituting the second heating means 20, and high-frequency power is generated. By being supplied, an induction heating operation is performed.

  As shown in FIG. 10, a heated object 5 c that is an elliptical two-handed pan is placed on the first heating port 1, and a heated object 5 d such as a circular frying pan is placed on the adjacent second heating port 2. Is assumed. For the heated object 5c having handles on both the left and right sides, the user 90 makes the handle generally face in the left-right width direction of the induction heating cooker 100 in order to make it easy to grasp both handles of the heated object 5c. Placing the article 5c to be heated is a natural operation. However, in this case, one handle of the object to be heated 5c may approach the object to be heated 5d placed on the second heating means 20 and interfere with or contact the object to be heated 5d. Therefore, the user 90 makes both handles of the object to be heated 5c slightly tilt with respect to the horizontal direction of the paper surface (the position of one handle is positioned in front of or behind the other handle). It is a natural action to place the article 5c to be heated. That is, the heated object 5c is placed so that the long side direction of the elliptical heated object 5c is slightly tilted back and forth.

  Here, a straight line X passing through the center A of the central heating coil 12 and extending from the front side of the induction heating cooker 100 to the back side so as to be orthogonal to the top plate 4, the center A of the central heating coil 12 and the peripheral heating coil Consider an angle α formed with a straight line Y passing through the center C of 11c.

  For example, when α = 0 degrees, the object to be heated 5c is placed on the upper side of the first heating unit 10 with the long side direction of the ellipse slightly tilted back and forth as described above. Is placed across the entire center heating coil 12 and peripheral heating coil 11. If it does so, as a result of detecting that the to-be-heated material 5c is mounted on all the heating coils by the load detection means 60, all the heating coils will be driven by the control part 45. FIG. However, in the example of the object to be heated 5c shown in FIG. 11, the peripheral heating coils 11a and 11c that do not contribute much to the heating of the object to be heated 5c are driven, and the heating efficiency is lowered. In addition, the area of the bottom surface of the object to be heated 5c that comes off (protrudes) from the heating coil is increased, which causes a problem that the heating efficiency is reduced and the time required for heating is increased.

For example, in order to avoid interference with the object to be heated 5d placed on the upper side of the second heating means 20, when the elliptical object to be heated 5c is placed on the user, the top plate 4, the long side of the object to be heated 5c may be urged to be placed, but when this is done, both the handles of the object to be heated 5c are grasped to lift (move) the object to be heated 5c. Usability will deteriorate.
In addition, when the object to be heated is placed on both the first heating means 10 and the second heating means 20, the distance between the object to be heated 5c and the object to be heated 5d is set to avoid interference between the objects to be heated. Although it is possible to place it away, the energization of the heating coil, which does not contribute much to the heating of both heated objects, increases, and the heated object is removed from the heating means (extruded). There is a problem that the time required for heating is increased due to a decrease in the temperature.

  Further, as another method for suppressing the interference between the object to be heated 5c and the object to be heated 5d, it is conceivable to dispose the first heating means 10 and the second heating means 20 away from each other. However, in this case, it is necessary to increase the width of the induction heating cooker (left and right direction in the figure), and there is a problem in that the induction heating cooker body becomes large and increases the weight of the induction heating cooker.

  In the induction heating cooker 100 shown in the first embodiment, an angle α formed by a straight line X and a straight line AC (straight line Y) connecting the center A of the central heating coil 12 and the center C of the peripheral heating coil 11c is substantially equal. It is set to 5 degrees or more and 20 degrees or less. Then, the peripheral heating coils 11a, 11b, and 11d are arranged at positions where the peripheral heating coil 11c is rotated 45 degrees around A. For this reason, when the elliptical heated object 5c is placed at a natural position with good cooking workability from the viewpoint of ergonomics, the peripheral heating coil 11b and the peripheral heating coil 11d are positioned below the heated object 5c. And possibility that the peripheral heating coil 11a and the peripheral heating coil 11c are located in the position removed from the to-be-heated material 5c can be raised. Therefore, the highly efficient induction heating cooking appliance 100 which stopped the electricity supply to the heating coil which does not contribute much to the to-be-heated material 5c can be obtained. Moreover, while suppressing the interference between the heated objects placed on the first heating means 10 and the second heating means 20 arranged on the left and right, the enlargement of the induction heating cooker body is suppressed, and further to the user It is possible to obtain an induction heating cooker 100 that has good cooking workability and is easy to use.

  In the first embodiment, the peripheral heating coil having an elliptical planar shape has been described. However, the shape is not particularly limited. For example, a configuration using a peripheral heating coil having a circular planar shape is also used. Good. However, it is desirable that the number of peripheral heating coils is larger than that of the central heating coil.

  In the first embodiment, the straight line Y passing through the center (A) of the central heating coil 12 is shown as a straight line Y inclined by α degrees in the clockwise direction, but the straight line X is inclined α degrees in the counterclockwise direction. The peripheral heating coil 11c may be arranged on the straight line Y. That is, for example, the heating coil shown in FIG. 5 is reversed left and right, and the peripheral heating coil 11 c is arranged on the right side in the front direction from the center (A) of the central heating coil 12. If it does in this way, when the user who cooks facing the induction heating cooking appliance 100 grasps the handle of the article 5 to be heated with the right hand and performs cooking with an ergonomic natural operation, efficient heating is performed. be able to. Even in such a configuration, the operation unit 40a and the display unit 41a are arranged so as to avoid the straight extension line connecting the center (A) of the central heating coil 12 and the center (C) of the peripheral heating coil 11c. To do. By doing in this way, the effect as above-mentioned can be acquired.

  As described above, the induction heating cooker 100 according to the first embodiment can be efficiently heated when the user places the heated object 5 having a handle in a natural motion, and cooking workability is also improved. However, a suitable pattern direction (straight line AC) when placing the article to be heated 5 may be displayed on the top 4 as a mark. By doing in this way, the above effects can be acquired more reliably.

  In the first embodiment, a straight line AC passing through the center (A) of the central heating coil 12a and the center (C) of the peripheral heating coil 11c passes through the point A and extends in the depth direction of the top plate 4. However, the central heating coil 12a and the peripheral heating coil 11c are arranged so that the straight line AC is not inclined with respect to the straight line X (so as to be in the same direction). May be. In that case, it is preferable to display on the top plate 4 the arrangement of the central heating coil 12 and the peripheral heating coil 11 and the direction of a suitable pattern (straight line AC) when the object to be heated 5 is placed. By doing so, it is possible to prompt the user to place the article to be heated 5 so that the straight line A-C and the pattern direction coincide with each other. And even if it is the substantially rectangular to-be-heated object 5a (for example, egg frying pan) which has a pattern by placing the to-be-heated object 5 so that the direction of a straight line AC and the pattern may correspond. Heating can be efficiently performed, and interference of the handle with the operation unit 40a and the display unit 41a can be suppressed.

  In the first embodiment, in addition to the peripheral heating coil 11c, an example in which three peripheral heating coils 11a, 11b, and 11d having the same shape are arranged on the outer peripheral side of the central heating coil 12 has been described. The number, shape, and arrangement of other peripheral heating coils of 11c are not particularly limited. For example, other odd-numbered or even-numbered peripheral heating coils having different shapes may be arranged along the outer periphery of the central heating coil 12, but from the viewpoint of heating a large object to be heated evenly, the peripheral heating coils of the same shape Should be arranged evenly.

Embodiment 2. FIG.
In the first embodiment described above, an example in which a heating coil for inductively heating the article to be heated 5 is provided as the heating means. However, for example, an electric heater such as a radiant heater may be provided as the heating means. Even in the case where an electric heater is provided as the heating means, a plurality of electric heaters are arranged at the heating port in accordance with the arrangement example of the central heating coil 12 and the peripheral heating coil 11 in the first embodiment. And the control part 45 performs electricity supply control separately with respect to each electric heater.

Moreover, as the load detection means 60 for detecting whether or not the object to be heated 5 is placed above the electric heater, for example, the weight sensor or the optical sensor exemplified in the first embodiment is employed. be able to.
Other configurations are the same as those described in the first embodiment.

  Thus, even if an electric heater is provided as the heating means, the same effect as that of the first embodiment can be obtained.

  1 1st heating port, 2nd heating port, 3rd heating port, 4 top plate, 5 heated object, 5a heated object, 5b heated object, 5c heated object, 5d heated object, 10 1st Heating means, 11 peripheral heating coils, 11a to 11j peripheral heating coils, 12 central heating coils, 12a, 12b central heating coils, 20 second heating means, 21a, 21b heating coils, 30 third heating means, 31 heating coils, 40 Operation part, 40a, 40b, 40c Operation part, 41 display part, 41a, 41b, 41c display part, 45 control part, 50 drive circuit, 50a-50f drive circuit, 60 load detection means, 90 user, 100 induction heating cooking vessel.

Claims (11)

A top plate on which the object to be heated is placed;
A heating means disposed below the top plate corresponding to the heating port, and heating the object to be heated;
An input device having a plurality of operation units for inputting operation settings;
A controller for driving and controlling the heating means,
The heating means includes a central heating unit and a first peripheral heating unit disposed on the near side of the central heating unit,
The plurality of operation units avoid the line (A-C) on the near side of the straight line (A-C) connecting the center (A) of the central heating unit and the center (C) of the first peripheral heating unit. A cooking device characterized by being separately arranged on the left and right sides on the front extension line of -C). The cooking device according to claim 1, wherein the straight line (A-C) is inclined within a range of less than 90 degrees with respect to a depth direction of the top plate. The input unit for instructing thermal power start, thermal power adjustment, and thermal power stop among the plurality of operation units is arranged on the right side of the straight line (AC). Or the cooking-by-heating machine of Claim 2. A top plate on which the object to be heated is placed;
A heating means disposed below the top plate corresponding to the heating port, and heating the object to be heated;
A display device having a plurality of display units for displaying an operation state;
A controller for driving and controlling the heating means,
The heating means includes a central heating unit and a first peripheral heating unit disposed opposite to the front side of the central heating unit,
The plurality of display units avoid the straight line (A) by avoiding a line extending in front of a straight line (AC) connecting the center (A) of the central heating unit and the center (C) of the first peripheral heating unit. A cooking device characterized by being separately arranged on the left and right sides on the front extension line of -C). The heating cooker according to claim 4, wherein the straight line (AC) is inclined in a range of less than 90 degrees with respect to a depth direction of the top plate. The cooking device according to claim 4 or 5, wherein a display unit for displaying a warning display among the plurality of display units is arranged on the right side of the straight line (AC). The center (C) of the first peripheral heating unit is arranged on the left side with respect to a straight line X extending in the depth direction of the top plate through the center (A) of the central heating unit. The cooking device according to any one of claims 1 to 6. The angle formed by the straight line X extending in the depth direction of the top plate through the center (A) of the central heating unit and the straight line (AC) is 5 degrees or more and 20 degrees or less. The heating cooker as described in any one of Claims 1-7. The heating means includes
The cooking device according to any one of claims 1 to 8, further comprising one or a plurality of second peripheral heating units provided along an outer peripheral direction of the central heating unit. The display which shows at least one of the position of the said center heating part and said 1st periphery heating part, and the said straight line (AC) is provided in the said top plate. The cooking device according to any one of 9. Each of the central heating unit and the first peripheral heating unit has a heating coil,
A drive circuit for supplying high-frequency power to the heating coil;
The heating cooker according to any one of claims 1 to 10, wherein the driving circuit is driven and controlled by the control unit.