JP2014035933A - Induction heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a user friendly and high-reliable and safe induction heating device capable of clearly indicating heating areas on a top plate.SOLUTION: The induction heating device includes: many heating coils (2) immediately under a heating area (9) in a top plate (1); and a light emitting section (3) disposed around each of the heating coils. The heating device is configured so that at least a part of the light emitting section emits light to indicate the heating area when no item to be heated (7) is placed in the heating area of the top plate.

Description

  The present disclosure relates to an induction heating apparatus that induction-heats an object to be heated such as a metal cooking pan placed on a top plate.

  In an induction heating cooker generally used as an induction heating device, for example, one or two heating coils are arranged immediately below the top plate, and are placed on the top plate by the heating coil. A metal cooking pan that is an object to be heated is heated by induction.

  Moreover, in the induction heating cooker, the multi-coil structure which has arrange | positioned many heating coils directly under the top plate is proposed (refer patent document 1). In the heating cooker disclosed in Patent Document 1, a number of heating coils laid under the top plate are arranged close to each other, and an object to be heated such as a cooking pan is placed on any position of the top plate. Even if it is placed, it has a configuration capable of induction heating.

  Furthermore, as a multi-coil configuration that heats a cooking pan that is an object to be heated by a large number of heating coils, for example, there is a heating cooker disclosed in JP-T-2008-527294 (Patent Document 2). The heating cooker disclosed in Patent Document 2 is arranged so that a relatively small hexagonal heating unit is spread under the top plate, and a plurality of cooking pans placed on the top plate are arranged. It is the structure which heat-cookes with a heating unit. As a heating unit in the heating cooker disclosed in Patent Document 2, two types of heating units, a radiant heater and an induction heater, are used. A honeycomb shape (hexagonal shape) is formed along the outer edge of each heating unit. ) Is provided with a lighting segment.

Spanish Patent Application No. 2366511 Special table 2008-527294

  As described above, the heating cooker disclosed in Patent Document 1 has a configuration capable of induction heating regardless of the position of the object to be heated placed on the top plate. Since the position where the coil is provided is unknown, it is impossible to identify an appropriate position to be placed in order to efficiently heat the object to be heated. Has a problem.

  In addition, since there is an operation area of the operation panel on the top plate, when an object to be heated is placed in this operation area, naturally, the object is not heated and the object to be heated is defined as an area that can be heated. When placed so as to cover both areas of the operation area, the operation panel may be heated by the object to be heated, which has a problem in terms of safety and reliability.

  In the heating cooker disclosed in Patent Document 2, when the cooking pan as the object to be heated is placed on the top plate, along the outer edge of the heating unit covered by the pan bottom of the cooking pan. The illumination segment is activated. However, in the heating cooker disclosed in Patent Document 2, since the lighting segment of the honeycomb-shaped heating unit covered by the pot bottom of the cooking pan is activated, the user can This is not a configuration in which an activated lighting segment can be easily confirmed by being blocked by a handle or a lid, and there is a problem in visibility. Moreover, in the cooking device disclosed in Patent Document 2, there is no configuration that indicates which region of the top plate is a heatable region, and it is not easy to confirm the heating region during the heating operation. For the user, there is a problem that it is uncertain whether the object to be heated is surely heated.

  As described above, in the case of a multi-coil configuration in which a large number of heating coils are laid under the top plate, the user can place an object to be heated in any region of the top plate and perform cooking. It is unclear whether or not the cooking operation is being performed with high efficiency. Therefore, in the induction heating device of the multi-coil configuration, the optimum position where the most efficient induction heating can be performed on the top plate is informed to the user, and the user confirms the optimum position and is optimal for the object to be heated. A configuration that can easily perform induction heating is important.

  An object of the present disclosure is to provide an induction heating device that is easy to use for a user in a multi-coil configuration in which a large number of heating coils are disposed under a top plate, and can be heated on the top plate. The area is clearly displayed to the user, and an easy-to-use heating device is constructed, and an induction heating device having high reliability and safety is shown.

An induction heating device according to the present disclosure includes a top plate having a region where an object to be heated can be induction-heated;
A plurality of heating coils that are arranged directly below the induction-heatable region of the top plate and generate an induction magnetic field to heat the object to be heated;
A light emitting unit disposed around each of the plurality of heating coils and emitting light visibly through the top plate;
A heated object detector for detecting that the heated object is disposed at a substantially upper position of each of the plurality of heating coils;
A heating control unit that controls an operation state of the heating coil and a light emission state of the light emitting unit based on a detection result by the object to be heated detection unit;
When the object to be heated is not placed in the induction-heatable region of the top plate, the heating control unit displays the at least a part of the light-emitting unit with the induction-heatable region as a heatable region. It is configured to

  The induction heating device according to the present disclosure clearly displays the heatable region on the top plate, and provides a heating device that is easy to use, highly reliable, and safe.

FIG. 3 is a plan view showing a top plate in the induction heating apparatus of the first embodiment. The top view which shows many heating coils and light emission parts in the induction heating apparatus of Embodiment 1. The block diagram which shows the element which comprises the display function of the heatable area | region and heating area | region in the induction heating apparatus of Embodiment 1. FIG. The top view which shows the state by which the heating possible area | region which is an outermost frame in the heating coil and light emission part in the induction heating apparatus of Embodiment 1 was displayed. The top view which shows a state when a to-be-heated material is mounted in the top plate in the induction heating apparatus of Embodiment 1. FIG. The top view which shows a state when a to-be-heated material is mounted in the top plate in the induction heating apparatus of Embodiment 1. FIG. The top view which shows a state when the to-be-heated material 7 is arrange | positioned in the center of the heating area | region 8 on the top plate in the induction heating apparatus of Embodiment 1. FIG. Side surface sectional drawing which showed typically the state by which the to-be-heated material is not arrange | positioned in the center in a heating area | region in the induction heating apparatus of Embodiment 1. FIG. Side surface sectional drawing which showed typically the state by which the to-be-heated object was arrange | positioned in the center in a heating area | region in the induction heating apparatus of Embodiment 1. FIG. The top view which shows many heating coils and the light emission part in the induction heating apparatus of Embodiment 2. FIG. The top view which shows the state by which the heatable area | region which is an outermost frame in the heating coil and light emission part in the induction heating apparatus of Embodiment 2 was displayed. The top view which shows a state when a to-be-heated material is mounted in the top plate in the induction heating apparatus of Embodiment 3. FIG. The block diagram which shows the element which comprises the display function of the heatable area | region and heating area | region in the induction heating apparatus of Embodiment 3.

The induction heating device according to the first aspect of the present disclosure includes a top plate having a region in which an object to be heated can be induction heated;
A plurality of heating coils that are arranged directly below the induction-heatable region of the top plate and generate an induction magnetic field to heat the object to be heated;
A light emitting unit disposed around each of the plurality of heating coils and emitting light visibly through the top plate;
A heated object detector for detecting that the heated object is disposed at a substantially upper position of each of the plurality of heating coils;
A heating control unit that controls an operation state of the heating coil and a light emission state of the light emitting unit based on a detection result by the object to be heated detection unit;
When the object to be heated is not placed in the induction-heatable region of the top plate, the heating control unit displays the at least a part of the light-emitting unit with the induction-heatable region as a heatable region. It is configured to
The induction heating device according to the first aspect configured as described above is a heating device that is easy to use and highly reliable and safe because the heatable region is clearly displayed on the top plate.

  The induction heating device according to the second aspect of the present disclosure is such that the heating control unit according to the first aspect is configured such that the object to be heated is placed when the object to be heated is placed in the heatable region of the top plate. Based on the detection result by the detection unit, the heated object is configured to cause at least a part of the light emitting unit around the heating coil disposed at a substantially upper position to emit light and display a heating region. Yes. The induction heating device according to the second aspect configured in this manner enables a user to reliably recognize a heating area for induction heating of an object to be heated, and improves the visibility of the heating area. It becomes possible to easily perform the centering operation of the object to be heated with respect to the heating region.

  In the induction heating apparatus according to the third aspect of the present disclosure, when the heating control unit according to the second aspect causes the light emitting unit to display the heating region based on a detection result by the heated object detection unit. The heated area is displayed by causing at least a part of the light emitting portion around the heating coil adjacent to the heating coil, which is disposed at a substantially upper position, to emit light. The induction heating device of the third aspect configured as described above enables the user to reliably recognize the heating area to be induction-heated by the object to be heated, improving the visibility of the heating area, and It becomes possible to easily perform the centering operation of the object with respect to the heating region.

  In the induction heating apparatus according to the fourth aspect of the present disclosure, the heating control unit according to the second or third aspect displays the heating region on the light emitting unit based on a detection result by the heated object detection unit. When heating, the light emitting unit is configured to prohibit light emission between the adjacent heating coils in the heating coil disposed at a substantially upper position. In the induction heating apparatus of the fourth aspect configured as described above, the user can recognize the heating area to be induction-heated by the object to be heated, and can easily perform a centering operation on the object to be heated. It becomes.

  In the induction heating device of the fifth aspect according to the present disclosure, the heating control unit in the first to fourth aspects indicates the heatable region based on a detection result by the object to be heated detection unit. It is comprised so that the light emission state of a light emission part may be controlled. In the induction heating device of the fifth aspect configured as described above, the user can surely recognize the heatable region where the object to be heated is to be placed.

  The induction heating device according to a sixth aspect of the present disclosure is the light emission in which the heating control unit in the first to fifth aspects indicates the heating region based on a detection result by the heated object detection unit. It is comprised so that the light emission state of a part may be controlled. In the induction heating device of the sixth aspect configured as described above, the user can surely recognize the state of the heating region where the object to be heated is placed.

An induction heating device according to a seventh aspect of the present disclosure includes, in the first to sixth aspects, a heating coil detection unit that detects a state of the multiple heating coils and supplies the state to the heating control unit. And
Based on detection results from the object to be heated detection unit and the heating coil detection unit, the heating control unit sets a region having a drivable heating coil in the plurality of heating coils as a heatable region. The light emitting unit is configured to emit light at least partially. In the induction heating device of the seventh aspect configured as described above, for example, when the full power cannot be exhibited at a high temperature of the heating coil, the region having the heating coil that can be driven reliably is displayed as the heatable region. Therefore, it becomes a user-friendly heating device for the user.

An induction heating device according to an eighth aspect of the present disclosure includes a top plate detection unit that detects the state of the top plate and supplies the state to the heating control unit in the first to seventh aspects. ,
The heating control unit is configured to set a heatable region based on detection results from the object to be heated detection unit and the top plate detection unit, and to emit at least a part of the light emitting unit in the heatable region. Has been. In the induction heating apparatus according to the eighth aspect configured as described above, for example, when there is a region having a high temperature in the top plate, it is possible to heat a region that can be reliably induction-heated by excluding that region. Since it becomes possible to display as an area | region, it becomes a user-friendly heating device.

  The induction heating device of the ninth aspect according to the present disclosure is such that the heating control unit in the first to eighth aspects changes the light emission state of the light emitting unit after the induction heating operation for the object to be heated is started. Is configured to change. In the induction heating device of the ninth aspect configured as described above, the user can surely recognize the state of the heatable region or the like where the object to be heated is placed.

An induction heating apparatus according to a tenth aspect of the present disclosure is the heating apparatus according to any one of the first to ninth aspects, wherein the temperature of an object to be heated that is placed in the heatable region and is induction-heated is detected. It has a heated object temperature detection unit that supplies to the control unit,
The heating control unit is configured to change a light emitting state of the light emitting unit based on a detection result from the heated object temperature detecting unit. In the induction heating device of the tenth aspect configured as described above, the temperature of the object to be heated on the top plate can be recognized to some extent, so that the user can easily use the heating device.

  Hereinafter, an embodiment of an induction heating apparatus according to the present disclosure will be described in detail with reference to the drawings as appropriate. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The inventor provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is intended to limit the subject matter described in the claims. is not.

  In the induction heating apparatus of the following embodiment, an induction heating cooker will be described, but this configuration is an exemplification, and the present invention is not limited to the configuration described in the following embodiment, and the present disclosure It includes an induction heating device having the following technical features. Further, the present invention includes appropriately combining arbitrary configurations described in the respective embodiments described below, and the combined configurations exhibit their respective effects.

(Embodiment 1)
FIG. 1 is a plan view showing a top plate on which an object to be heated such as a cooking pan is placed in the built-in type induction heating cooker that is the induction heating device according to the first embodiment of the present disclosure. FIG. 2 is a plan view showing a number of heating coils and the like provided immediately below the top plate in the induction heating cooker according to the first embodiment of the present disclosure.

  The top plate 1 in the induction heating cooker shown in FIG. 1 shows a state when the induction heating cooker is not activated. As shown in FIG. 1, when the induction heating cooker is not activated, the entire surface of the top plate 1 is in a non-display state with no display other than showing the frame line of the operation area 4a. In addition, when the said induction heating cooking appliance is not started, it is good also as a non-display state without the frame of the operation area | region 4a, and the whole surface of the top plate 1 being displayed at all. As described above, when the entire surface of the top plate 1 is in a non-display state with almost no display, an induction heating cooker having an aesthetic appearance can be constructed, and the commercial value can be increased.

  FIG. 2 is an arrangement view showing a number of heating coils 2 and the like arranged immediately below the top plate 1. The heating coil 2 is configured to be supplied with a desired high-frequency current so as to generate an induction magnetic field in order to heat an object to be heated placed on the top plate 1. As shown in FIG. 2, immediately below the top plate 1, a plurality of heating coils 2 are arranged in a straight line in each of the vertical and horizontal rows. In the induction heating cooker shown in FIG. 2, as an example, a configuration is shown in which five heating coils 2 are arranged in parallel vertically and nine heating coils 2 are arranged in parallel. In addition, in the induction heating cooker of the first embodiment, the light emitting units 3 configured in a lattice shape so as to surround each heating coil 2 are provided. That is, each heating coil 2 is disposed in a substantially square frame formed by the light emitting unit 3.

  As described above, the light emitting unit 3 is arranged in a frame shape around each of the multiple heating coils 2, and is configured to emit light so as to be visible through the top plate 1. As the configuration of the light emitting unit 3, for example, an LED is used as a light emitting element, and light from the light emitting element is incident on the light guide plate, and each of the light guide plates constituting the frame emits light. .

  In addition, immediately below the operation area 4a in the top plate 1, an operation unit 4 configured by overlapping a touch panel on a liquid crystal display unit is provided. When the induction heating cooker is activated, an operation button on the operation unit 4 is provided. Is displayed, and the operation content and operation content are emitted and displayed in the operation area 4a.

  In the first embodiment, one heating segment 10 is constituted by one heating coil 2 and a frame-like light emitting section 3 surrounding four sides of the heating coil 2. Therefore, in the adjacent heating segment 10, it becomes the structure by which the light emission part 3 arrange | positioned between them is shared.

  In the induction heating cooker of the first embodiment, when the induction heating cooker is activated, only the light emitting unit 3 configured by the outermost frame emits light, and the metal cooking pan in the top plate 1 The heatable area 9 on which the object 7 to be heated can be placed is displayed, and the user can reliably recognize the heatable area 9. Therefore, in the induction heating cooker of Embodiment 1, it becomes a structure which can make a user recognize reliably that the area | region on either side of the operation area | region 4a in the top plate 1 is not a heatable area | region.

  Moreover, in the induction heating cooking appliance of Embodiment 1, it is comprised so that the presence or absence of the to-be-heated material 7 may be detected in each heating segment 10, and when the to-be-heated material 7 is mounted in the heatable area | region. The heating segment 10 on which the heated object 7 is placed detects the presence of the heated object 7, and the light emitting unit 3 in the heated segment 10 emits light. At this time, when the heated object 7 is detected in the plurality of heating segments 10, the light emitting unit 3 between the adjacent heating segments does not emit light.

  In each heating segment 10, the to-be-heated object detection part 5 which detects whether the to-be-heated object 7 was mounted is weak to the heating coil 2 in each heating segment 10, when the said induction heating cooking appliance starts. In this configuration, a detection current that is a current is supplied, and the presence or absence of a load on the heating coil 2 is detected based on a change in the detection current. Therefore, by adjusting the threshold value for comparing the detected currents, even when the region covering the heating segment 10 is a small load, the heating coil 2 of the heating segment can be reliably detected. The heated object detection unit 5 is configured to output a detection signal to the heating control unit 6 when the heated object is disposed at a substantially upper position in the heating coil 2. Here, the substantially upper position in the heating coil 2 refers to a position in a region where the current flowing in the heating coil 2 changes due to the object to be heated and exceeds the set threshold value.

  FIG. 3 is a block diagram illustrating elements that constitute a display function of a heatable region and a heating region that is in the induction heating operation in the induction heating cooker according to the first embodiment. In FIG. 3, when the user starts the induction heating cooker by a cooking start operation in the operation unit 4, an activation signal is input from the operation unit 4 to the heating control unit 6. When the activation signal is input, the heating control unit 6 causes only the light emitting unit 3 constituting the outermost frame body in the light emitting unit 3 provided directly below the top plate 1 to emit light, so that the Displays the heatable area. FIG. 4 is a plan view showing a state where the outermost frame light-emitting part 3 emits light and the heatable region 9 is displayed in the heating coil 2 and the light-emitting part 3 arranged immediately below the top plate 1. FIG. As shown in FIG. 4, in the state before the object to be heated is placed on the top plate 1, the frame located on the outermost side in the top plate 1 emits light, and the heatable region 9 is displayed. . Therefore, the user can recognize the heatable region 9 on the top plate 1, and can reliably place the cooking pan, which is an object to be heated, on the heatable region on the top plate 1. It becomes composition. For this reason, in the induction heating cooker of Embodiment 1, it is reliably prevented that the cooking pan which is an object to be heated is placed in an erroneous region where the induction heating in the top plate 1 cannot be performed.

  Moreover, the heating control part 6 performs the detection operation | movement which detects whether the to-be-heated material 7 was mounted in each heating segment 10 with respect to the to-be-heated object detection part 5, when a starting signal is input. In this detection operation, a detection current is passed through the heating coil 2 in each heating segment 10, and the presence or absence of the object 7 to be heated is detected by a change in the detection current.

  When the object to be heated is placed on the heatable region 9 in the top plate 1 and disposed substantially above the heating coil 2, the object to be heated detection unit 5 is based on the detection current of the heating coil 2. A detection signal as a detection result is output to the heating control unit 6. When the heated object detection unit 5 detects that the heated object is placed on the heatable region 9 in the top plate 1, the heating control unit 6 causes the light emitting unit 3 in the corresponding heating segment 10 to emit light. At this time, the light emission of the light emitting unit 3 existing between the adjacent heating segments 10 may be prohibited. That is, when the heating control unit 6 displays the heating region 8 on the light emitting unit 3 based on the detection result by the heated object detection unit 5, the heating object in the heating coil 2 arranged at a substantially upper position. It is good also as a structure which prohibits light emission of the light emission part 3 between the adjacent heating coils 2, and the heating area | region 8 light-emitted in the shape of a square frame around the to-be-heated material is displayed.

  As described above, in the induction heating cooker according to the first embodiment, the outermost region in the region constituted by the heating segment 10 covered with the object to be heated placed in the heatable region 9 of the top plate 1 is provided. Only the light emitting unit 3 indicating the frame emits light. Thus, the area | region comprised by the heating segment 10 covered with the to-be-heated material turns into the heating area | region 8 induction-heated by the heating coil 2 driven by the heating mode set by the user. In the induction heating cooker configured as described above, the heating region 8 for inductively heating the object to be heated emits light in a square frame shape around the object to be heated. In addition, the heating area 8 is not obstructed by a lid or the like, and the user can reliably recognize the heating area 8. As a result, the induction heating cooker according to the first embodiment has good visibility with respect to the heating region 8 and can easily perform a centering operation to be described later with respect to the heating region 8.

  FIG. 5 is a plan view showing a state when the object to be heated 7 is placed on the top plate 1, and shows a state where the heating region 8 is displayed by the light emitting unit 3. As shown in FIG. 5, when the object to be heated 7 is placed in the heatable region of the top plate 1, the light emitting unit 3 in the heating segment 10 that detects the object to be heated 7 emits light in a square frame shape. At this time, even if the heated object 7 covers a part of the heating segment 10, the heated object 7 is detected in the heating segment 10 so that the light emitting unit 3 corresponding to the heated segment 10 emits light. It is configured.

[Centering operation for heated object]
The induction heating cooker according to the first embodiment has a configuration in which the object to be heated 7 is arranged so as to be in the center of the heating region 8 and the centering operation capable of increasing the heating efficiency can be easily performed. ing.

  FIG. 6 is a plan view showing a state when a heated object 7, which is a metal cooking pan, is placed on the top plate 1. As shown in FIG. 6, for example, when the object to be heated 7 is not disposed at the center of the heating region 8 that emits light in a square frame shape, the object to be heated 7 is used to be disposed at the center of the heating region 8. Can be encouraged. FIG. 7 is a plan view showing a state when the object to be heated 7 is arranged at the center of the heating region 8 that emits light in a square frame shape in the top plate 1. As shown in FIG. 7, the object to be heated 7 is arranged at the center of the heating region 8, so that the object to be heated 7 is efficiently heated by induction by the heating coil 2 in the heating region 8. 6 and 7, as a display method of the heating region 8, a state in which all the light emitting units 3 in the heating segment 10 in which the object 7 to be heated is detected emits light is illustrated. In other words, the light emitting unit 3 is not prohibited from emitting light between the adjacent heating segments 10 having the heating coil 2 that has detected that the article 7 to be heated is placed.

  FIG. 8 is a side cross-sectional view schematically showing a state in which the object to be heated 7 is not disposed at the center in the heating region 8, and FIG. 9 is a diagram in which the object 7 to be heated is disposed at the center in the heating region 8. The state arrange | positioned in the position with the highest heating efficiency with respect to the heating coil 2 is shown. As is apparent from a comparison between FIG. 8 and FIG. 9, in the state where the heated object 7 is arranged at the center of the heating region 8 as shown in FIG. 9, the heated object 7 is affected by the magnetic flux generated by the heating coil 2. Is in a state where it is efficiently received, and a highly efficient induction heating state is obtained.

  In the induction heating cooker that is the induction heating device of the first embodiment, the object to be heated 7 is placed on the top plate 1 and the heating region 8 is displayed, and then the induction heating operation for the object to be heated 7 is performed. Can be started. In the first embodiment, the configuration has been described in which the heatable region 9 is not displayed after the heating region 8 is displayed. However, the heatable region (9a: see FIG. 12) continues after the heating region 8 is displayed. You may comprise so that it may display. In this case, you may change the light emission state of the light emission part 3 in the heatable area | region (9a) after the heating area | region 8 is displayed. For example, in order to display the heatable region (9a) after the heating region 8 is displayed, the amount of light, the wavelength (color) and / or the light emission state differ from those of the heatable region 9 before the heating region 8 is displayed. You may make it light-emit (for example, blinking state).

  In the induction heating device according to the first embodiment of the present disclosure configured as described above, the top plate 1 is not displayed when the induction heating device is not used, that is, when the induction heating device is not activated. Once the induction heating device is activated, the heatable region 9 is clearly displayed on the top plate 1, so that the commercial value is high and the configuration is easy to use. Furthermore, in the induction heating apparatus according to the first embodiment, the heatable region 9 is displayed on the top plate 1 and the heating coil 2 is substantially excited when the object to be heated 7 is placed. A certain heating region 8 is displayed, which is easy to use and becomes a heating device having high heating efficiency, high reliability, and high safety.

(Embodiment 2)
Hereinafter, the induction heating apparatus according to the second embodiment of the present disclosure will be described. The difference between the induction heating device of the second embodiment and the induction heating device of the first embodiment is the configuration of the heating coil arranged immediately below the top plate.

  In the description of the induction heating device of the second embodiment below, the same reference numerals are given to the components having the same functions and configurations as the components in the induction heating device of the first embodiment, and the detailed description thereof is the embodiment. The explanation of 1 applies. In addition, since the basic operation in the second embodiment is the same as the operation in the first embodiment described above, differences from the first embodiment will be mainly described in the following description of the second embodiment.

  FIG. 10 is a plan view showing a number of heating coils 2 and light emitting units 3 provided immediately below the top plate in a built-in type induction heating cooker that is an example of the induction heating device according to the second embodiment of the present disclosure. It is. As shown in FIG. 10, in the induction heating cooker according to the second embodiment, each heating coil 2 is surrounded by the light emitting sections 3 arranged in a lattice shape, similarly to the configuration of the first embodiment. Has been placed. That is, each heating coil 2 is disposed in a substantially square frame formed by the light emitting unit 3. In addition, the operation part 4 is provided directly under the operation area | region in the top plate 1, When the said induction heating cooking appliance starts, the operation button, operation content, etc. in the operation part 4 light-emit, and operation in the top plate 1 is carried out. It is configured to be displayed in the area.

  As shown in FIG. 10, in the configuration of the second embodiment, the heating coils 2 are also provided in the left and right regions of the operation unit 4 immediately below the top plate 1. Therefore, in the induction cooking device of the second embodiment, if the size of the top plate 1 is the same, the heatable region 9 can be set wider than the configuration of the first embodiment.

  FIG. 11 is a plan view showing a state in which the light emitting part 3 of the outermost frame body emits light and the heatable region 9 is displayed in the heating coil 2 and the light emitting part 3 arranged immediately below the top plate 1. FIG. As shown in FIG. 11, in the state before the object to be heated 7 is placed on the top plate 1, the outermost frame on the top plate 1 emits light, and the heatable region 9 is displayed. Yes. Therefore, the user can recognize the heatable region 9 on the top plate 1, and can be configured to reliably place the article 7 to be heated on the heatable region on the top plate 1. For this reason, in the induction heating cooking appliance of Embodiment 2, it is prevented reliably that the to-be-heated material 7 is mounted in the incorrect area | region which cannot perform the induction heating in the top plate 1. FIG.

  The operation after the object 7 to be heated in the induction heating cooker according to the second embodiment is placed in the heatable region 9 is the heating segment 10 covered with the object 7 to be heated as described in the first embodiment. Is detected, and only the light emitting portion 3 indicating the outermost frame body of the region constituted by the detected heating segment 10 emits light, and the heating region 8 for induction heating the object 7 to be heated is provided. Is displayed.

  In the induction heating device according to the second embodiment of the present disclosure configured as described above, the effect similar to the effect in the induction heating device according to the first embodiment is achieved, and further, the heatable region is set wider, It has a high product value and is easy to use.

(Embodiment 3)
Hereinafter, the induction heating apparatus according to the third embodiment of the present disclosure will be described. In the induction heating device of the third embodiment, the difference from the induction heating device of the first embodiment and the second embodiment described above is the light emission configuration of the light emitting unit arranged immediately below the top plate.

  In the description of the induction heating device of the third embodiment below, components having the same functions and configurations as those of the induction heating device of the first embodiment are denoted by the same reference numerals, and the detailed description thereof is described in the embodiment. The explanation of 1 applies. Further, the basic operation in the third embodiment is the same as the operation in the first embodiment described above, and therefore, in the following description of the third embodiment, differences from the first embodiment will be described. The configuration of the third embodiment is substantially the same as that of the first embodiment, and is characterized by controlling the light emission state of the light emitting unit 3, so that FIG. 5 used in the description of the first embodiment is used. This will be described with reference to FIG. The configuration of the third embodiment can also be applied to the induction heating device of the second embodiment, and has the same effect as when applied to the induction heating device of the first embodiment.

  FIG. 12 is a plan view showing a state when the object to be heated 7 is placed on the top plate 1 in the induction heating device of the third embodiment, along with a state where the heating region 8 is displayed by the light emitting unit 3. The state where the heatable region 9a is displayed is shown. FIG. 13 is a block diagram showing elements constituting the display function of the heatable region 9a and the heating region 8 in the induction heating apparatus of the third embodiment.

  As shown in FIG. 12, when the heated object 7 is placed on the heatable region 9a of the top plate 1, the frame of the light emitting unit 3 in the heating segment 10 that detects the heated object 7 emits light, A heating area 8 on which the object to be heated 7 is placed is displayed. At this time, the heating coil 2 in the heating segment 10 still functions as a sensor of the heated object detection unit 5. When the heating coil 2 functions as a sensor of the object to be heated detection unit 5, as shown in FIG. 12, in the induction heating device of the third embodiment, the heatable region 9a is displayed with light emission. The display state of the heatable region 9a that emits light at this time may be a light emission state that is different from the display state of the heatable region 9a before the object 7 is placed. For example, the light amount and / or wavelength (color) may be changed, the light emission state may be changed, for example, the blinking state may be performed.

  As described above, when the heated object detection unit 5 detects the heated object 7, the heating control unit 6 causes the operation unit 4 to perform heating corresponding to the heating region 8 where the detected heated object 7 is placed. Displays the operation area. The user confirms the heating operation area displayed on the operation unit 4 and performs a heating start command operation on the heating operation area. When the heating start command operation is executed, the heating coil 2 in the heating region 8 is substantially activated to generate an alternating magnetic field, and the induction heating operation is started. The light emitting unit 3 showing the heating region 8 surrounding the heating coil 2 that has started the induction heating operation may be configured to display that the amount of light is increased and the heating region 8 is performing the induction heating operation. In this case, the color of the frame showing the heating region 8 may be changed by changing the wavelength. As described above, the induction heating operation is surely performed for the user by displaying the heating region 8 performing the induction heating operation by changing (controlling) the light emission state of the light emitting unit 3. Can show that.

  In addition, in the induction heating apparatus according to the third embodiment, when the object to be heated 7 is placed on the heatable region 9a and induction heated, the object to be heated temperature detection unit 11 (which detects the temperature of the object to be heated 7) ( 13) is provided. In this way, the bottom temperature of the cooking pan that is the object to be heated 7 is always detected by the object to be heated temperature detection unit 11, and the detection signal that is the detection result is input to the heating control unit 6. . For this reason, the heating control part 6 is good also as a structure which changes the light quantity and / or wavelength (color) of the heating area | region 8 according to the detected temperature of the to-be-heated material 7. FIG. By comprising in this way, the temperature management at the time of cooking with respect to the to-be-heated material 7 and an operation | work can be made easy for a user. In addition, as the to-be-heated material temperature detection part 11, the non-contact-type temperature sensor is used, for example, an infrared sensor is used.

  Furthermore, in the induction heating apparatus of the third embodiment, when the heating region 8 is performing the induction heating operation, the light emission state of the light emitting unit 3 indicating the heatable region 9a is the same as before the heating region 8 performs the induction heating operation. The light emission state may be different from the display state of the heatable region 9a. For example, the amount of light and / or wavelength (color) may be changed, or blinking may be performed.

  In addition, in the induction heating apparatus of Embodiment 3, the heating coil detection part 12 which detects the temperature state of each heating coil 2 is provided. As the heating coil detection unit 12, a contact-type temperature sensor or a non-contact-type temperature sensor can be used. For example, a thermistor or an infrared sensor is used. The detection signal from the heating coil detection unit 12 is input to the heating control unit 6, and the heating control unit 6 can be driven based on the detection results from the heated object detection unit 5 and the heating coil detection unit 12. A region having a simple heating coil may be configured as a heatable region 9a so that the light emitting unit 3 in the heatable region 9a emits light. In the induction heating device according to the third embodiment, when there are heating coils 2 in a state in which a large number of heating coils 2 arranged immediately below the top plate 1 cannot be induction-heated at full power because of high temperature, the full power Only a region constituted by the heating segment 10 having the heating coil 2 that can be induction-heated in the above may be configured to emit light and display as the heatable region 9a. By comprising in this way, since the heatable area | region 9a with high heating efficiency is always displayed, the said induction heating apparatus becomes easy to use for a user, and turns into a heating apparatus with high cooking efficiency.

  In addition, the induction heating apparatus of the third embodiment is configured to detect the temperature state of the top plate by the top plate detection unit 13 and to output a detection signal as a detection result to the heating control unit 6. As the top plate detection unit 13, a contact type temperature sensor or a non-contact type temperature sensor can be used. For example, a thermistor or an infrared sensor is used. When a high temperature region is detected in the top plate 1, a region excluding the high temperature region may be displayed as a heatable region 9a. At this time, the light emitting unit 3 in the high temperature region is caused to emit light with a wavelength (color) different from that of the heatable region 9a and / or a blinking state, and the high temperature region in the top plate 1 is displayed to the user. May be. By comprising in this way, the said induction heating apparatus turns into a heating apparatus easy to use for a user.

  In the induction heating apparatus according to the third embodiment, when the object to be heated 7 is placed on the top plate 1, the heating segment 10 that detects the object to be heated 7 emits light in a frame shape to display the heating region 8. However, the heating area 8 may be configured to display a larger area as the heating area 8. That is, the area including the heating segment 10 adjacent to the heating segment 10 in which the object 7 to be heated is detected is displayed as a heating area 8 by the corresponding light emitting unit 3. This configuration exhibits a particularly excellent effect when the diameter of the heating coil 2 immediately below the top plate 1 is small and one heating segment 10 is small, and the user can easily place the object 7 to be heated against the heating region 8. In addition, the centering operation can be performed reliably.

  In the induction heating apparatus according to the third embodiment of the present disclosure configured as described above, the user can reliably recognize the heatable region 9a in which an appropriate induction heating operation can be performed, and the object to be heated 7 The user can grasp the heating area 8 on which is placed, and can perform an induction heating operation with high efficiency. For this reason, the induction heating device of the third embodiment has a higher commercial value and is easy to use. Furthermore, in the induction heating device of the third embodiment, since the heatable region 9a and the heating region 8 are displayed, the heating device has high reliability and safety.

  The present disclosure presents an induction heating apparatus having excellent commercial value and high reliability and safety, and can be applied to various devices that perform induction heating, such as an induction heating cooker.

DESCRIPTION OF SYMBOLS 1 Top plate 2 Heating coil 3 Light emission part 4 Operation part 4a Operation area 5 Heated object detection part 6 Heating control part 7 Heated object 8 Heating area 9, 9a Heatable area 10 Heating segment 11 Heated object temperature detection part 12 Heating Coil detector 13 Top plate detector

Claims (10)

A top plate having a region capable of inductively heating the object to be heated;
A plurality of heating coils that are arranged directly below the induction-heatable region of the top plate and generate an induction magnetic field to heat the object to be heated;
A light emitting unit disposed around each of the plurality of heating coils and emitting light visibly through the top plate;
A heated object detector for detecting that the heated object is disposed at a substantially upper position of each of the plurality of heating coils;
A heating control unit that controls an operation state of the heating coil and a light emission state of the light emitting unit based on a detection result by the object to be heated detection unit;
When the object to be heated is not placed in the induction-heatable region of the top plate, the heating control unit displays the at least a part of the light-emitting unit with the induction-heatable region as a heatable region. An induction heating device configured to do.   When the object to be heated is placed in the heatable region of the top plate, the heating control unit is positioned at a substantially upper position based on a detection result by the object to be heated detection unit. The induction heating apparatus according to claim 1, wherein the heating area is displayed by causing at least a part of the light emitting portion around the arranged heating coil to emit light.   When the heating control unit displays the heating area on the light emitting unit based on the detection result by the heated object detection unit, the heated object is adjacent to the heating coil disposed at a substantially upper position. The induction heating apparatus according to claim 2, wherein the heating area is displayed by causing at least a part of the light emitting portion around the heating coil to emit light.   When the heating control unit displays the heating region on the light emitting unit based on the detection result by the heated object detection unit, the heated object is adjacent to the heating coil arranged at a substantially upper position. The induction heating device according to claim 2 or 3, wherein the light emitting unit between the heating coils is configured to prohibit light emission.   The said heating control part is comprised so that the light emission state of the said light emission part which shows the said heatable area | region may be controlled based on the detection result by the said to-be-heated material detection part. Induction heating device.   The said heating control part is comprised so that the light emission state of the said light emission part which shows the said heating area | region may be controlled based on the detection result by the said to-be-heated material detection part. Induction heating device. A heating coil detection unit that detects a state of the multiple heating coils and supplies the detection unit to the heating control unit;
Based on the detection results from the heated object detection unit and the heating coil detection unit, the heating control unit sets the region having the driveable heating coils in the multiple heating coils as the heatable region. The induction heating device according to any one of claims 1 to 6, wherein at least a part of the light-emitting portion in the light-emitting device is configured to emit light. A top plate detection unit that detects the state of the top plate and supplies it to the heating control unit;
The heating control unit is configured to set a heatable region based on detection results from the object to be heated detection unit and the top plate detection unit, and to emit at least a part of the light emitting unit in the heatable region. The induction heating device according to any one of claims 1 to 7.   The induction heating apparatus according to any one of claims 1 to 8, wherein the heating control unit is configured to change a light emission state of the light emitting unit after an induction heating operation for an object to be heated is started. A heating object temperature detection unit that detects the temperature of the heating object that is placed in the heatable region and is induction-heated and that supplies the heating control unit;
The induction heating device according to any one of claims 1 to 9, wherein the heating control unit is configured to change a light emitting state of the light emitting unit based on a detection result from the heated object temperature detecting unit. .

Images