JP2014044823A - Induction heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating apparatus which allows an induction heating apparatus having a multicoil configuration to be easily assembled in a simple process; and which can prevent oscillation of a heating coil even when the induction heating apparatus shakes; the induction heating apparatus achieving a downsized and thin apparatus; and having reliability and safety.SOLUTION: An induction heating apparatus comprises: multiple heating coil units (2) arranged just below a top plate on which a heated object is placed in a matrix in a plane for inductively heating the heated object; an energization part (11) for depressing each heating coil unit to the top plat; slide guide parts (4, 29) each having a slide guide surface which contacts the heating coil unit to limit an oscillation direction of the heating coil unit caused by the energization part to a predetermined direction.

Description

  The present disclosure relates to an induction heating device that induction-heats an object to be heated such as a metal cooking pan placed on a top plate, and more particularly, an induction having a multi-coil configuration having a large number of heating coils directly under the top plate. The present invention relates to a heating device.

  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). The cooking device disclosed in Patent Document 1 has a configuration capable of induction heating even when the object to be heated is placed on any position of the top plate.

Spanish Patent Application No. 2366511

  As described above, in the heating cooker disclosed in Patent Document 1, in order to achieve a configuration in which an object to be heated can be induction-heated regardless of the position of the top plate, there are many under the top plate. The heating coils are arranged close to each other. In addition, in the heating cooker disclosed in Patent Document 1, each of a number of heating coils is pressed against the back surface of the top plate from below by a spring, and each heating coil is pressed against the top plate and fixed. It is a configuration.

  Therefore, at the time of assembling the conventional cooking device configured as described above, a large number of heating coils are placed at predetermined positions with respect to the top plate by using the pressing force of the spring. It had to be fixed accurately and was complicated and accompanied by very difficult work.

  In addition, in the conventional cooking device having a multi-coil configuration, the heating coil is configured to be pressed against the top plate by a spring. The adjacent heating coils may come into contact with each other. In addition, since multiple control lines such as signal lines from various sensors are routed around the heating coil, the control lines may be scratched due to the expansion and contraction of the spring that occurs during vibration, or the control lines may be cut off in some cases There is a problem in terms of reliability and safety in the apparatus.

  Therefore, in a conventional cooking device having a multi-coil configuration, it is necessary to provide a special mechanism so that the heating coil does not oscillate (sway) due to vibration or impact during transportation. There was also a big problem in achieving this.

  In the present disclosure, an induction heating device having a multi-coil configuration can be easily assembled in a simple process, and even when it is vibrated, the heating coil can be prevented from swinging (rolling), and the size can be reduced. It is another object of the present invention to provide an induction heating device that achieves a reduction in thickness and has high reliability and safety.

The induction heating device in the present disclosure is:
A top plate on which an object to be heated is placed;
A large number of heating coil units that are provided in rows and columns in a plane directly under the top plate and induction-heat the object to be heated;
An urging portion that presses the heating coil unit against the top plate;
A sliding guide portion disposed around the heating coil unit, having a sliding guide surface in contact with the heating coil unit, and restricting a vibration direction of the heating coil unit by the biasing portion in a predetermined direction. To do.

  The induction heating apparatus according to the present disclosure can easily assemble a multi-coil configuration in a simple process, and can prevent the heating coil from swinging (rolling) even when it vibrates, and can be downsized. In addition, it is thin and achieves high reliability and safety.

The top view which shows the state which removed the top plate in the induction heating cooking appliance of Embodiment 1 which concerns on this indication. The top view which shows the top plate in the induction heating cooking appliance of Embodiment 1. The perspective view which expands and shows the heating coil unit and the light emission display unit which were arranged in parallel in the induction heating cooking appliance of Embodiment 1. FIG. Partial sectional view along line III-III in the induction heating cooker shown in FIG. Partial sectional view along line IV-IV in the induction heating cooker shown in FIG. The block diagram which shows the element which comprises the display function of the light emission display unit in the induction heating cooking appliance of Embodiment 1. FIG. The top view which shows the light emission state of the light emission display unit when the to-be-heated material is mounted in the top plate in the induction heating cooking appliance of Embodiment 1. FIG. The top view which shows many heating coil units, the light emission display unit, etc. which are provided directly under the top plate in the induction heating cooking appliance of Embodiment 2 which concerns on this indication. The top view which shows the top plate in the induction heating cooking appliance of Embodiment 2. In the induction heating cooking appliance of Embodiment 2, the perspective view which expands and shows the heating coil unit and the light emission display unit which were arranged in parallel. Partial sectional view along the line IX-IX in the induction heating cooker shown in FIG. Partial sectional drawing by the XX line in the induction heating cooking appliance shown in FIG. The perspective view which shows the light guide unit in the induction heating cooking appliance of Embodiment 2. FIG. The top view which shows the light emission state of the light emission display unit when the to-be-heated material is mounted in the top plate in the induction heating cooking appliance of Embodiment 2. FIG.

The induction heating device of the first aspect according to the present disclosure is:
A top plate on which an object to be heated is placed;
A large number of heating coil units that are provided in rows and columns in a plane directly under the top plate and induction-heat the object to be heated;
An urging portion that presses the heating coil unit against the top plate;
A sliding guide portion disposed around the heating coil unit, having a sliding guide surface in contact with the heating coil unit, and restricting a vibration direction of the heating coil unit by the biasing portion in a predetermined direction. To do. The induction heating device of the first aspect configured as described above can be easily assembled and can prevent the heating coil from swinging (rolling) even when it is vibrated. It achieves thinning and high reliability and safety.

  The induction heating device according to the second aspect of the present disclosure is arranged such that the sliding guide surface of the sliding guide part according to the first aspect is in contact with an outer peripheral surface of the heating coil unit, and the heating The coil unit is formed so as to restrict the vibration direction of the coil unit in the same direction as the pressing direction of the urging portion against the top plate. The induction heating device of the second aspect configured in this way can reliably prevent the heating coil from swinging (rolling) even when it vibrates, and has high reliability and safety. It becomes a heating device.

The induction heating apparatus according to the third aspect of the present disclosure is arranged around the heating coil unit in the second aspect, and emits light through the top plate so as to be visible and display a heating region. Unit,
The sliding guide portion is formed in each of the light emitting display units. The induction heating device of the third aspect configured as described above has a configuration in which the heating region can be surely visually recognized on the top plate, and the sliding guide portion is provided in the light-emitting display unit, so Therefore, the heating coil can be prevented from swinging (rolling) and reduced in size and thickness, and the heating device has high reliability and safety.

  An induction heating device according to a fourth aspect of the present disclosure is configured such that the light emitting display unit according to the third aspect emits light in a dot shape around the heating coil unit, and the dot shape of the light emitting display unit. A region surrounded by light emission is configured as a heating region. In the induction heating device of the fourth aspect configured as described above, the heating region is displayed by a plurality of point light emission on the top plate, so that the heating device is easy to use and highly reliable.

An induction heating device according to a fifth aspect of the present disclosure includes a light emitting display case in which the light emitting display unit according to the fourth aspect is disposed in a space surrounded by at least the heating coil unit, and the light emitting display. A light-emitting element that is a light-emitting source provided in the case and an upper surface of the light-emitting display case that faces the top plate, and is irradiated after light from the light-emitting element is reflected on a wall surface in the light-emitting display case. And a membrane sheet having a light emitting region that shines in a dot shape,
In the sliding guide portion, a surface in contact with the heating coil unit in the light emitting display case is configured as a sliding guide surface. In the induction heating device of the fifth aspect configured as described above, since the heating area on the top plate is configured integrally with the light emitting display unit that emits light and displays the entire light emitting area of the membrane sheet, The apparatus is reduced in size and thickness, and becomes a heating device having high reliability and safety.

  In an induction heating apparatus according to a sixth aspect of the present disclosure, the sliding guide portion according to the fifth aspect has a plurality of fin shapes protruding in the direction of the heating coil unit, and the protrusion of the fin shape The end portion serves as a sliding guide surface, and the sliding guide portion extends in the same direction as the pressing direction of the biasing portion against the top plate in the light emitting display case. The induction heating apparatus of the sixth aspect configured as described above can reliably prevent the heating coil from swinging (rolling) even when it vibrates, and has high reliability and safety. It becomes a heating device. In addition, in the induction heating device of the sixth aspect, since the sliding guide surface is narrow and the friction between the heating coil unit and the sliding guide surface is small, the heating coil unit is configured to be able to smoothly vibrate up and down.

  An induction heating device according to a seventh aspect of the present disclosure is configured such that the light emitting display unit according to the third aspect emits light linearly around the heating coil unit, and the linear shape of the light emitting display unit. A region surrounded by light emission is configured as a heating region. In the induction heating apparatus of the seventh aspect configured as described above, since the heating area is displayed by linear light emission on the top plate, the heating area is easy to understand for the user and easy to use. It becomes.

An induction heating device according to an eighth aspect of the present disclosure includes a light emitting display case in which the light emitting display unit according to the seventh aspect is disposed in a space surrounded by at least the heating coil unit, and the light emitting display. A light-emitting unit provided in a case as a light-emitting source and a light-guiding unit that is provided so as to connect between the adjacent light-emitting display cases, and whose upper surface facing the top plate emits light by light from the light-emitting element; With
In the sliding guide portion, a surface in contact with the heating coil unit in the light guide unit is configured as a sliding guide surface. The induction heating device of the eighth aspect configured as described above is integrally formed with the light emitting display unit that displays the heating region on the top plate, so that the device can be reduced in size and thickness, and is high. It becomes a heating device having reliability and safety. In addition, in the induction heating device of the eighth aspect, since the light emitting display unit, particularly the light guide unit, is located in the gap between the heating coil units, heat transfer due to convection and radiation can be suppressed, and heat loss is greatly increased. It is the structure which can aim at easy suppression.

  In the induction heating device of the ninth aspect according to the present disclosure, the sliding guide portion in the eighth aspect has a function as a light shielding body that shields light from the light guide unit. A contact surface of the sliding guide portion with the heating coil unit is a sliding guide surface, and the sliding guide surface extends in the same direction as the pressing direction of the biasing portion against the top plate. Even if the induction heating apparatus of the ninth aspect configured in this manner vibrates, the heating guide swings (rolls) using a member whose sliding guide portion also serves as a light emitting display unit. The heating apparatus can be reliably prevented and has high reliability and safety. In the induction heating device of the ninth aspect, since the sliding guide portion extends in the opposite direction with respect to the top plate, even if the heating coil unit moves largely downward, the heating coil unit is not swung. This configuration can reliably prevent movement (rolling).

  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 illustrating a state where a top plate on which an object to be heated such as a cooking pan is placed is removed from the induction heating cooker that is the induction heating device according to the first embodiment of the present disclosure. As shown in FIG. 1, the induction heating cooker according to the first embodiment includes a large number of heating coil units 2, light emitting display units 3, and the like immediately below the top plate that covers the upper opening of the main body housing 1. Various members having a multi-coil configuration are provided.

  As shown in FIG. 1, heating coil units 2 are arranged in a vertical and horizontal row in the body housing 1, and in the example of the induction heating cooker according to the first embodiment, Five in the vertical row and nine in the horizontal row are arranged side by side, and 45 heating coil units 2 are provided. Therefore, in the top plate, the area immediately above the area where many heating coil units 2 are arranged becomes a heatable area, and even if a plurality of objects to be heated are placed in the heatable area, induction heating is possible. .

  In the top plate, an operation display unit 5 is disposed in a region other than the heatable region in which the heating coil unit 2 is disposed. In the induction heating cooker according to the first embodiment, the user side An operation display unit 5 is provided in a central area on the front side. The operation display unit 5 is configured by overlapping a liquid crystal display unit with a touch panel. When the induction heating cooker is activated, operation buttons on the operation display unit 5 are displayed, and operation contents and operation contents are displayed. It is the structure displayed by emitting light.

  FIG. 2 is a plan view showing the top plate 6 in the induction heating cooker according to the first embodiment. FIG. 3 is an enlarged perspective view showing the heating coil unit 2 and the light emitting display unit 3 arranged side by side in the induction heating cooker according to the first embodiment, and shows a state immediately below the heatable region in the top plate. Yes. 4 is a partial cross-sectional view taken along line IV-IV in the induction heating cooker shown in FIG. 1, and FIG. 5 is a partial cross-sectional view taken along line V-V in the induction heating cooker shown in FIG. is there. 4 and 5, the configuration of one heating coil unit 2 and the light emitting display units 3 arranged on both sides thereof are shown in cross section.

  The top plate 6 in the induction heating cooker according to the first embodiment uses, for example, transparent crystallized glass, and a black colored film 16 is printed on the surface facing the heating coil unit 2 (the back surface of the top plate 6). Has been. The colored film 16 has a double structure of a black light transmitting film 16a that transmits light and a black light shielding film 16b that blocks light. On the back surface of the top plate 6, a light transmission film 16 a is printed on the entire surface other than the operation display unit 5, and a light shielding film 16 b is formed thereon from a predetermined region, for example, the operation display unit 5, the light emitting display unit 3, which will be described later. It is printed in a predetermined area other than the surface facing the optical sensor 15. Therefore, it is configured such that the user cannot see members such as the heating coil unit 2 in the main body housing 1 through the top plate 6 from the outside. In addition, a heat insulating material 17 made of, for example, mica material is disposed between the colored film 16 and the heating coil unit 2 for the purpose of blocking heat from the heating coil unit 2. In addition, although the heat insulating material 17 is provided in the area | region which opposes the heating coil unit 2 in the back surface of the top plate 6, in the area | region which opposes the light emission display unit 3, and the center part of the heating coil unit 2, Is not provided with a heat insulating material 17. In addition, in the induction heating cooker according to the first embodiment, the heat insulating material 17 is fixed to each heating coil unit 2, and at the time of assembly, each heating coil unit 2 and the heat insulating material 17 are integrated to form a housing. The configuration is incorporated in the main body 1.

<Configuration of heating coil unit>
Each heating coil unit 2 in the induction heating cooker according to the first embodiment has a heating coil 13 that generates an induction magnetic field to heat an object to be heated such as a cooking pan placed on the top plate 6. And a ferrite (not shown) as a magnetism collecting member and a mica plate (not shown) as a heat insulating member. A part of the heating coil 13, ferrite and a mica plate are accommodated in the heating coil case 14. Yes. Between the back surface side of the heating coil case 14 and the main body base 19, an urging portion, for example, a compression coil spring 11 is disposed as urging means, and the heating coil case is pressed by the pressing force of the compression coil spring 11. 14 is a structure always pressed by the top plate 6. As a result, the surface of the heating coil 13 (the upper surface on the top plate side) is in a state of being surely adhered to the top plate 6 at all times via the heat insulating material 17 and the colored film 16.

  As shown in FIG. 5, each heating coil unit 2 is provided with an optical sensor 15 that detects the temperature of an object to be heated placed on the top plate 6 on the heating coil unit 2. is there. An optical sensor 15 using infrared rays, which is a temperature detection unit for the object to be heated, is fixed to an optical sensor holding unit 20 in which a detection window is disposed in an opening at the center of the heating coil 13. Is arranged. Therefore, the top plate 6 facing the central portion of the heating coil 13 is provided with the light transmission film 16a and not the heat insulating material 17, so that the object to be heated placed on the top plate 6 is not provided. This configuration detects the temperature with high accuracy.

<Configuration of light-emitting display unit>
The light emitting display units 3 are arranged at four positions around each heating coil unit 2 and are configured to emit light substantially in a spot shape through the top plate 1 so as to be visible. The light emitting display unit 3 is disposed in a space sandwiched between heating coil units 2 arranged in a row in a vertical and horizontal plane, and is in contact with the outer peripheral surface of the heating coil case 14 in the heating coil unit 2. Is arranged. That is, the light emitting display unit 3 is arranged at the position of the apex of a quadrangular lattice-shaped frame body which is configured to surround the heating coil units 2 arranged side by side in rows and columns.

  In the induction heating apparatus according to the first embodiment, the heating coil unit 2 has a substantially circular shape in plan view, and is provided so that these heating coil units 2 are laid out side by side in a horizontal and vertical row. Therefore, for example, an empty space is formed in a region surrounded by the four heating coil units 2. In the induction heating device of the first embodiment, since the light emitting display unit 3 is provided in the empty space formed between the heating unit coils 2, the space in the device is efficiently used, and the size and thickness are reduced. It has an important structure for achieving the above.

  The light emitting display unit 3 includes a light emitting element 8 as a light emitting source, for example, an LED, a light emitting display case 9 that houses the light emitting element 8 and has an inner wall surface that reflects light emitted from the light emitting element 8, and a light emitting display case 9. A membrane sheet 12 having a cross-shaped opening 10 which is a cross-shaped opening is provided on the surface facing the top plate 6. The membrane sheet 12 is made of a milky white light transmitting material, and a film body that forms the cross-shaped opening 10 is printed on the membrane sheet 12. The light emitting element 8 is provided in the light emitting display case 9 so that the light emitted from the light emitting element 8 does not directly irradiate the cross-shaped opening 10. That is, the light emitting display unit 3 is configured to irradiate the cross-shaped opening 10 after the light from the light emitting element 8 is reflected on the inner wall surface of the light emitting display case 9. With this configuration, when the light emitting element 8 emits light, the light that is emitted in a substantially dot-like cross shape that has passed through the cross-shaped opening 10 of the membrane sheet 12 passes through the top plate 6. This is to prevent the cross-shaped opening 10 from emitting light unevenly. As a result, since the light emitting display unit 3 in the light emitting state is configured to display the heating region by a plurality of dot-like light emission, the induction heating cooker of the first embodiment can reliably recognize the heating region through the top plate 6. It becomes a heating device having high visibility. In the present disclosure, the point light emission includes those that can be visually recognized in a dot shape by the light from the cross-shaped opening as described above, and the light-emitting opening shape is limited to the cross shape. However, it includes various shapes that can emit light substantially in the form of dots, such as circles, triangles, and squares.

  In the induction cooking device of the first embodiment, as shown in FIG. 4, the light emitting element 8 is arranged to emit light upward in the direction of the top plate 6, but directly below the cross-shaped opening 10. Since the light from the light-emitting element 8 is reflected on at least the back surface of the membrane sheet 12 other than the cross-shaped opening 10 and the inner wall surface of the light-emitting display case 9, the cross-shaped opening 10 is irradiated. It has become. The membrane sheet 12 and the light emitting display case 9 are made of, for example, a white resin material and have a surface that can reflect the light from the light emitting element 8. In addition, four light emitting elements 8 are provided in one light emitting display case 9 and are arranged so as to be equidistant from each other and from the membrane sheet 12.

<Configuration of sliding guide>
As shown in FIG. 5, the light emitting display unit 3 is provided with a sliding guide 4 at a position facing the heating coil unit 2. The sliding guide 4 is slidably disposed on the outer peripheral surface of the heating coil case 14 in the heating coil unit 2. Even when each heating coil unit 2 is vibrated by the compression coil spring 11 during the conveyance of the induction heating cooker, the vibration direction of each heating coil unit 2 is regulated in the vertical direction, and each heating coil unit 2 is heated. Movements that cause failures such as contact and collision that occur when the coil unit 2 swings (rolls) are surely prohibited. Here, the vertical direction refers to a direction orthogonal to the plane of the top panel 6 immediately above the heating coil unit 2 being pressed.

  In the induction heating cooker according to the first embodiment, the sliding guide portion 4 has a fin shape in which the longitudinal direction is the vertical direction, and is provided with three protrusions extending in the vertical direction. Therefore, the sliding surface between the sliding guide portion 4 and the outer peripheral surface of the heating coil case 14 is a straight line extending long in the vertical direction (vibration direction). The coil case 14 is formed to correspond to the curved surface of the outer peripheral surface.

  As described above, in the induction heating apparatus of the first embodiment, the sliding guide portion 4 has a plurality of fin shapes protruding in the direction of the heating coil unit 2, and the protruding end portions of these fin shapes are It becomes a sliding guide surface with the outer peripheral surface of the heating coil case. The fin-shaped sliding guide portion 4 formed on the outer surface of the light emitting display case extends in the same direction as the pressing direction against the top plate 6 by the compression coil spring 11 which is an urging portion. Since the sliding guide portion 4 configured as described above is provided in the light emitting display unit 3, the induction heating device according to the first embodiment swings the heating coil even when it vibrates. Can be reliably prevented, and the heater has high reliability and safety.

  In the first embodiment, the example in which the sliding guide portion 4 is fin-shaped and the sliding surface is linear has been described. However, the present disclosure is not limited to such a configuration. The surface may have a shape corresponding to the outer peripheral surface of the heating coil case 14, and may be any configuration that restricts the vibration direction of the heating coil unit 2 to prevent swinging (rolling). In the induction heating apparatus of the first embodiment, by providing the sliding guide portion 4 on the side surface of the light-emitting display unit 3, the space inside the apparatus can be used efficiently, and the heating coil swings (horizontal). In addition to preventing (swaying), it is possible to achieve a reduction in size and thickness.

<Light emission operation of the light emitting display unit>
FIG. 6 is a block diagram showing elements constituting the display function of the light emitting display unit in the induction cooking device of the first embodiment. In FIG. 6, when the user starts the induction heating cooker by a cooking start operation on the operation display unit 5, an activation signal is input from the operation display unit 5 to the heating control unit 22. When the activation signal is input, the heating control unit 22 causes only the outermost light-emitting display unit 3 in the light-emitting display unit 3 provided immediately below the top plate 6 to emit light, thereby setting the heatable region in the top plate 6. indicate.

  Moreover, the heating control part 6 performs the detection operation | movement which detects whether the to-be-heated object was mounted in each heating coil unit 2 with respect to the to-be-heated object detection part 21, when a starting signal is input. In this detection operation, a detection current is passed through the heating coil 13 in each heating coil unit 2, and the presence or absence of an object to be heated is detected by a change in the detection current.

  When the object to be heated is placed on the heatable region of the top plate 6 and disposed at a substantially upper position in the heating coil unit 2, the object to be heated is detected based on the detection current of the heating coil unit 2. The unit 21 outputs a detection signal as a detection result to the heating control unit 22. When the object to be heated detection unit 21 detects that the object to be heated is placed on the heatable region of the top plate 6, the heating control unit 22 displays the light emitting display unit 3 around the corresponding heating coil unit 2. To emit light. At this time, when an object to be heated is detected in the plurality of heating coil units 2, the light emitting display unit 3 surrounded by the heating coil unit 2 that has detected the object to be heated may not emit light. With this configuration, only the light-emitting display unit 3 at the outer edge portion of the heating area that induction-heats the object to be heated emits light, and unnecessary lighting of the light-emitting display unit that is covered with the object to be heated in the heating area Is prevented.

  As described above, when the heated object detection unit 21 detects the heated object, the heating control unit 22 causes the operation display unit 5 to perform a heating operation area corresponding to the heating area where the detected heated object is placed. Is displayed. The user confirms the heating operation area displayed on the operation display unit 5 and performs a heating start command operation on the heating operation area. When the heating start command operation is executed, the heating coil 13 of the heating coil unit 2 in the heating region is substantially activated to generate an alternating magnetic field, and the induction heating operation is started. The light emitting display unit 3 showing the heating area surrounding the heating coil unit 2 that has started the induction heating operation may be configured to display that the amount of light is increased and the heating area is performing the induction heating operation. In this case, you may change the color of the frame which shows a heating area | region by changing a wavelength. Thus, the induction heating operation is reliably executed for the user by changing (controlling) the light emission state of the light emitting display unit 3 to display that the heating region is performing the induction heating operation. Can show that.

  FIG. 7 is a plan view showing a light emission state of the light emitting display unit 3 when two objects to be heated 7 and 7 are placed in the heatable region of the top plate 6 in the induction heating cooker of the first embodiment. is there. FIG. 7 shows a light emission state of the light emitting display unit 3 in a state where the top plate 6 is removed, and the cross-shaped opening 10a that emits light is indicated by hatching.

  As shown in FIG. 7, in the induction heating cooker according to the first embodiment, when the object to be heated 7 is placed in the heatable region of the top plate 6, the heating coil unit 2 that detects the object 7 to be heated is used. The surrounding light emitting display units 3 emit light. At this time, even if the object 7 to be heated covers a part of the heating coil unit 2, the object 7 to be heated is detected in the heating coil unit 2, and the light emitting display units 3 around the heating coil unit 2 are detected. Is configured to emit light. In the induction heating cooker according to the first embodiment, when the object 7 to be heated is placed on the heatable region of the top plate 6, it has a cross-like shape that is substantially point-shaped at the position of the apex of a substantially square shape. Since the heating area is informed to the user through the top plate 6 by light emission, the heating area can be surely recognized by the user without being obstructed by a handle, a lid or the like of the article 7 to be heated.

  In the light emitting display unit 3, the configuration has been described in which light is emitted in a cross shape, which is a shape that protrudes in four directions substantially as point light emission. By causing the cross-shaped light to be emitted in this way, there is an effect of allowing the user to recognize the boundary where the cross-shaped protruding portion indicates the heating region. For example, when the light emitting display unit 3 that emits light in a cross shape is at the corner of the heating area, the two protruding portions arranged to be bent at right angles in the cross shape can make the corner of the heating area easily visible to the user. it can. Further, when the light-emitting display unit 3 that emits light in a cross shape is in the middle of the side of the heating region, the user can easily recognize that the two protruding portions extending linearly indicate the side of the heating region. it can. In this way, the adjacent light emitting display unit 3 emits light in a cross shape and displays the boundary of the heating region, so that the user is guided by the adjacent cross-shaped light emission state, and the boundary of the heating region is easily provided. I can grasp it.

  In the induction heating cooker according to the first embodiment, since the user can easily recognize the position of the heating coil unit 2 that induction-heats the object 7 to be heated, the user heats the object 7 to be heated. By arranging (centering operation) so as to be in the center of the region, induction heating with high efficiency can be performed on the object 7 to be heated.

  The induction heating cooker according to the first embodiment is a heated object temperature detection unit for detecting the temperature of the heated object 7 when the heated object 7 is placed in the heatable region and induction heated. An optical sensor 15 is provided. Thus, the temperature at the bottom of the cooking pan, which is the object to be heated, is always detected by the object temperature detecting unit, and the detection signal that is the detection result is input to the heating control unit 22. For this reason, the heating control part 22 is good also as a structure which changes the light quantity and / or wavelength (color) of a heating area | region 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, a cooking operation | work, etc. can be made easy for a user.

  Moreover, in the induction heating cooking appliance which is the induction heating apparatus of Embodiment 1, after the to-be-heated material 7 is mounted on the top plate 6 and a heating area | region is displayed, the induction heating with respect to the to-be-heated material 7 is carried out. Operation starts. The first embodiment has been described with the configuration in which the heatable region is not displayed after the heating region is displayed. However, the heatable region may be continuously displayed after the heating region is displayed. In this case, the light emission state of the light emitting display unit 3 in the heatable area after the heating area is displayed may be changed. For example, in order to display the heatable area after the heating area is displayed, the light amount, wavelength (color) and / or light emission state (for example, blinking state) different from that of the heatable area before the heating area is displayed. You may make it light-emit.

  In the induction heating apparatus according to the first embodiment of the present disclosure configured as described above, a light-emitting display unit in which a heatable region and / or a heating region is arranged around the heating coil unit 2 on the top plate 6. It is the structure which carries out the point light emission display using. For this reason, the induction heating device according to the first embodiment of the present disclosure is a user-friendly heating device in a multi-coil configuration in which a large number of heating coils 13 are disposed under the top plate 6, and the top plate The heating region on 6 can be clearly displayed without being blocked by the object to be heated by the user, and a heating device that is easy to use and has high reliability can be provided.

(Embodiment 2)
Hereinafter, an induction heating cooker will be described as an example of the induction heating apparatus according to the second embodiment of the present disclosure. The induction heating cooker according to the second embodiment is different from the above-described induction heating cooker according to the first embodiment in the configuration of a light-emitting display unit arranged immediately below the top plate.

  In the description of the induction heating cooker of the second embodiment below, components having the same functions and configurations as the components in the induction heating cooker of the first embodiment are denoted by the same reference numerals, and detailed description thereof is carried out. The description of Form 1 is applied. 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. 8 is a plan view showing a number of heating coil units 2 and light-emitting display units 23 provided directly below the top plate 6 in the induction heating cooker that is an example of the induction heating device according to the second embodiment of the present disclosure. FIG. FIG. 9 is a plan view showing a top plate in the induction cooking device of the second embodiment.

  As shown in FIG. 8, in the induction heating cooker of the second embodiment, as in the configuration of the first embodiment, a large number of heating coil units 2 are arranged vertically and horizontally inside the main body housing 1. Arranged in a line, the area immediately above the area where a large number of heating coil units 2 are arranged becomes a heatable area, and by placing an object to be heated, induction heating is possible.

  Moreover, in the induction heating cooker of Embodiment 2, the light emission display unit 23 comprised by the grid | lattice form so that each heating coil unit 2 may be enclosed is provided. That is, each heating coil unit 2 is arranged in a rectangular frame that is a substantially square formed by the light emitting display unit 23.

  As described above, the light emitting display unit 23 is arranged in a frame shape around each of the plurality of heating coil units 2, and is configured to emit light in a frame shape so as to be visible through the top plate 6. In the induction heating cooker of the second embodiment, the heating coil unit 2 has the same configuration as the heating coil unit 2 in the first embodiment described above, and the configuration of the light emitting display unit 23 is different. Explained.

  FIG. 10 is an enlarged perspective view showing the heating coil unit 2 and the light emitting display unit 23 arranged side by side in the induction heating cooker according to the second embodiment, and shows a state immediately below the heatable region in the top plate 6. ing. FIG. 11 is a partial cross-sectional view taken along line XI-XI in FIG. 8 and shows a light emitting display unit 23 having a light guide unit 25 and a light emitting display case 24 in contact with the side surface of the heating coil unit 2. . FIG. 12 is a partial cross-sectional view taken along line XII-XII in FIG. 8, and is a cross-sectional view taken along the approximate center of the heating coil unit 2. 11 and 12 show the configuration of one heating coil unit 2 and light emitting display units 23 arranged on both sides thereof.

<Configuration of light-emitting display unit>
The light emitting display unit 23 is arranged in a frame shape so as to surround each of the heating coil units 2, and is configured to emit light in a lattice shape so as to be visible through the top plate 6. The light emitting display unit 23 serves as a light emitting source, for example, a light emitting element 8 composed of LEDs, a light emitting display case 24 incorporating the light emitting element 8, and light from the light emitting element 8 is incident and guided, and light is emitted from an end surface. And a light guide unit 25 having a light guide portion 26 that emits light.

  As shown in FIG. 10, the light emitting display cases 24 of the light emitting display unit 23 are disposed in a space sandwiched between the heating coil units 2 arranged side by side in rows and columns. The light guide unit 25 led out to is arranged so as to be in contact with the outer peripheral surface of the heating coil case 14 in the heating coil unit 2. That is, the light emitting display unit 23 is disposed so as to surround the heating coil units 2 arranged side by side in the vertical and horizontal directions.

  The top plate 6 in the induction heating cooker according to the second embodiment uses, for example, transparent crystallized glass, and a black colored film 16 is printed on the back surface of the top plate 6. The colored film 16 has a double structure of a black light transmitting film 16a that transmits light and a black light shielding film 16c that blocks light. On the back surface of the top plate 6, a transmissive film 16 a is printed on the entire surface other than the operation display unit 5, and the light shielding film 16 c is formed on a predetermined region such as the operation display unit 5, the light emitting display unit 3, and the optical sensor 15. Is printed in a predetermined area other than the surface facing the. Therefore, it is configured such that the user cannot see members such as the heating coil unit 2 in the main body housing 1 through the top plate 6 from the outside.

  As shown in FIG. 11, the light guide unit 25 includes a plate-shaped light guide unit 26 made of a light-transmitting resin, and the adjacent light emitting display cases 24 that hold the left and right ends of the light guide unit 26. A light guide holding portion 27 for suspending the light guide, a light guide support portion 28 having a convex portion that supports the lower side of the light guide portion 26 and has a central portion protruding downward, and the light guide portion 26 and the light guide support. And a sliding guide portion 29 (see FIG. 13) provided so as to cover both side surfaces of the portion 28.

  FIG. 13 is a perspective view showing the light guide unit 25 in the second embodiment. As shown in FIG. 13, the upper surface of the light guide portion 26 facing the top plate 6 is not covered, and light from the light emitting element 8 is emitted from the upper surface that is the upper end surface of the light guide portion 26. . In the light guide unit 25 shown in FIG. 13, the light emitting elements 8 are arranged below the step portions formed on both sides of the light guide unit 26, and are configured to irradiate from both sides of the light guide unit 26. As a result, the upper surface (the surface on the top plate side) of the light guide portion 26 emits light substantially linearly by light emitted from the light emitting elements 8 on both sides. As a result, the light emitting display unit 23 in the light emitting state is configured to have high visibility through the top plate 6.

  In the induction heating cooker according to the second embodiment, the end surface other than the upper surface of the light guide unit 26 is covered with the light shielding body 30 so that light does not leak. The light blocking body 30 has a function of blocking light and a heat insulating function, and is used as a sliding guide portion 29 described later. For this reason, the light shield 30 is made of a material having a slippery surface. In the second embodiment, a mica material is used as the light shielding body 30. Since the light guide unit 25 configured as described above is disposed so as to be in contact between the adjacent heating coil units 2, the heating coil units 2 are reliably insulated from each other.

<Configuration of sliding guide>
As shown in FIG. 13, the light guide unit 25 in the light emitting display unit 23 is provided with a sliding guide portion 29 that is also used as the light shield 30 at a position facing the heating coil unit 2. The sliding guide portion 29 is formed of a mica plate and is slidably disposed on the outer peripheral surface of the heating coil case 14 in the heating coil unit 2. In the sliding guide part 29, the convex part 18 which protrudes below is formed in the center part.

  As described above, in the induction heating cooker according to the second embodiment, the outer peripheral surface of the heating coil case 14 is in contact with the middle portion of the sliding guide portion 29 in the longitudinal direction. A convex portion 18 that protrudes downward is formed at an intermediate portion in the direction. Therefore, in the induction heating cooker of the second embodiment, the portion where the sliding guide portion 29 and the heating coil case 14 are in contact with each other is configured such that the length in the vertical direction (the pressing direction to the top plate) is increased. Has been. For this reason, even if the heating coil unit 2 vibrates due to the compression coil spring 11, the outer peripheral surface of the heating coil case 14 can always be brought into contact with the sliding guide portion 29 without coming off.

  Since the sliding guide portion 29 is provided as described above, even when each heating coil unit 2 is vibrated by the compression coil spring 11 during transport of the induction heating cooker, each heating coil unit 2 is heated. The vibration direction of the coil unit 2 is regulated to reliably prevent the cause of failure such as contact or collision caused by the swing of each heating coil unit 2. In the induction heating cooker according to the second embodiment, since a mica plate is used as the sliding guide 29, the heat of the adjacent heating coil units 2 is insulated. For this reason, it becomes possible to shorten the arrangement | positioning space | interval between the heating coil units 2, can achieve size reduction and efficiency, and can construct | assemble an induction heating apparatus with high reliability. Furthermore, in the induction heating device of the second embodiment, the sliding guide portion 29 is provided on the side surface of the light guide unit 25 of the light emitting display unit 23 so as to also serve as the light shield 30, thereby efficiently using the space inside the device. Thus, the heating coil can be prevented from swinging (rolling), and the size and thickness can be reduced.

  In the second embodiment, the sliding surface of the sliding guide portion 29 has been described as an example of a planar shape. However, the present disclosure is not limited to such a configuration, and the sliding surface is a heating coil case. 14 may be a curved surface shape corresponding to the outer peripheral surface of the heating coil unit 2 as long as the vibration direction of the heating coil unit 2 is restricted only in the vertical direction and the rocking (rolling) is prohibited.

<Light emission operation of the light emitting display unit>
The light emitting operation of the light emitting display unit 23 in the induction heating cooker according to the second embodiment is basically the same as the light emitting operation of the light emitting display unit 3 according to the first embodiment, and operates with the same components. This will be described using the components shown in the block diagram of FIG.

  When the user starts the induction heating cooker by a cooking start operation on the operation display unit 5, an activation signal is input from the operation display unit 5 to the heating control unit 22. When the activation signal is input, the heating control unit 22 allows only the outermost light-emitting display unit 23 of the many light-emitting display units 23 provided immediately below the top plate 6 to emit light, thereby heating the top plate 6. Display area.

  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 coil unit 2 with respect to the to-be-heated object detection part 21, when a starting signal is input. . In this detection operation, a detection current is passed through the heating coil 13 in each heating coil unit 2, and the presence or absence of the object to be heated 7 is detected by a change in the detection current.

  When the object to be heated 7 is placed on the heatable region of the top plate 6 and arranged at a substantially upper position in the heating coil unit 2, the object to be heated is based on the detected current of the heating coil unit 2. The detection unit 21 outputs a detection signal that is a detection result to the heating control unit 22. When the heated object detection unit 21 detects that the heated object 7 is placed on the heatable region of the top plate 6, the heating control unit 22 displays the light emitting display units around the corresponding heating coil unit 2. The light emitting element 8 in 23 is caused to emit light. At this time, when the heated object 7 is detected in the plurality of heating coil units 2, the light guide unit 26 of the light guide unit 25 existing between the heating coil units 2 that detected the heated object 7 may not emit light. good.

  FIG. 14 is a plan view showing a light emission state of the light emitting display unit 23 when the two objects 7 and 7 are placed on the heatable region of the top plate 6 in the induction heating cooker of the second embodiment. is there. In FIG. 14, the light emission state of the light emission display unit 23 in the state in which the top plate 6 was removed is shown, and the light guide 26a that emits light is indicated by hatching.

  As shown in FIG. 14, in the induction heating cooker according to the second embodiment, when the object to be heated 7 is placed in the heatable region of the top plate 6, the heating coil unit 2 that detects the object 7 to be heated is used. The surrounding light emitting display units 23 emit light. At this time, even when the object to be heated 7 covers a part of the heating coil unit 2, the object to be heated 7 is detected in the heating coil unit 2, and the light emitting display units 23 around the heating coil unit 2 are detected. Is configured to emit light. In the induction heating cooker according to the second embodiment, when the object to be heated 7 is placed on the heatable area of the top plate 6, the square frame-shaped heating area is used through the top plate 6 by the light emission of the light emitting display unit 23. The person is recognized and the heated area in the top plate is surely recognized without being obstructed by the handle or lid of the article 7 to be heated.

  In the induction heating cooker according to the second embodiment, since the user can easily recognize the heating coil unit 2 that induction-heats the object 7 to be heated, the user can place the object 7 to be heated in the heating area. It is the structure which can arrange | position a to-be-heated object so that it may arrange | position in the best position so that it may become a center (centering operation | movement), and can be induction-heated efficiently by a heating coil unit.

  In the induction heating cooker according to the second embodiment, when an object to be heated is placed on the top plate 6, the light emitting display unit 23 that detects the object to be heated emits light in a frame shape to display the heating area. Although configured, a region that is one size larger as the heating region may be displayed as the heating region. In other words, the area that includes the light emitting display unit 23 adjacent to the light emitting display unit 23 that has detected the object to be heated is displayed as a heating area. This configuration exhibits a particularly excellent effect when the diameter of the heating coil unit 2 immediately below the top plate 6 is small, and the user can easily and reliably center the heating target with respect to the heating area. It becomes possible.

  In addition, the top plate 6 does not necessarily need to print a black film body on the back surface of transparent crystallized glass, and the glass itself may be colored. The induction heating device of the present disclosure may be configured so that the members in the main body housing 1 are not visible to the user and the light emission state of the light emitting display unit 3 and the display portion of the operation display unit 5 can be visually recognized.

  In the induction heating apparatus according to the second embodiment of the present disclosure configured as described above, the light emitting display unit 23 in which the heatable region and the heating region are arranged around the heating coil unit 2 on the top plate 6 are provided. It is the structure which carries out the light emission display to a frame shape using. For this reason, the induction heating device according to the second embodiment of the present disclosure is a user-friendly heating device in a multi-coil configuration in which a number of heating coils are disposed under the top plate 6, and the top plate 6 The heating area on the upper side is clearly displayed to the user, and a heating device that is easy to use and has high reliability can be provided.

  The present disclosure presents an induction heating device that is easy to use and has high reliability, and can be applied to various devices that perform induction heating, such as an induction heating cooker, and provide high commercial value. it can.

DESCRIPTION OF SYMBOLS 1 Main body housing | casing 2 Heating coil unit 3 Light emission display unit 4 Sliding guide part 5 Operation display part 6 Top plate 7 Object to be heated 8 Light emitting element 9 Light emission display case 10 Cross-shaped opening part 11 Compression coil spring (biasing part)
DESCRIPTION OF SYMBOLS 12 Membrane sheet 13 Heating coil 14 Heating coil case 15 Optical sensor 16 Colored film 16a Light transmission film 16b, 16c Light shielding film 17 Heat insulating material 18 Convex part 19 Main body base 20 Optical sensor holding part 21 Heated object detection part 22 Heating control part DESCRIPTION OF SYMBOLS 23 Light emission display unit 24 Light emission display case 25 Light guide unit 26 Light guide part 27 Light guide holding part 28 Light guide support part 29 Sliding guide part

Claims (9)

A top plate on which an object to be heated is placed;
A large number of heating coil units that are provided in rows and columns in a plane directly under the top plate and induction-heat the object to be heated;
An urging portion that presses the heating coil unit against the top plate;
A sliding guide portion disposed around the heating coil unit, having a sliding guide surface in contact with the heating coil unit, and restricting a vibration direction of the heating coil unit by the biasing portion in a predetermined direction. Induction heating device.   The sliding guide surface of the sliding guide portion is disposed so as to contact the outer peripheral surface of the heating coil unit, and the vibration direction of the heating coil unit is set in the same direction as the pressing direction of the biasing portion against the top plate. The induction heating device according to claim 1, wherein the induction heating device is formed to be regulated. A plurality of light emitting display units that are arranged around the heating coil unit and that emit a visible light through the top plate to display a heating region;
The induction heating device according to claim 2, wherein the sliding guide portion is formed in each of the light emitting display units.   4. The light emitting display unit according to claim 3, wherein the light emitting display unit is configured to emit light in a spot shape around the heating coil unit, and a region surrounded by the point light emission of the light emitting display unit is a heating region. Induction heating device. The light emitting display unit includes: a light emitting display case disposed in a space surrounded by at least the heating coil unit; a light emitting element serving as a light emitting source provided in the light emitting display case; and the top of the light emitting display case. A membrane sheet provided on an upper surface facing the plate, and having a light emitting region that emits light after being reflected on a wall surface in the light emitting display case and shining in a dot-like manner.
The induction heating device according to claim 4, wherein the sliding guide portion includes a surface that contacts the heating coil unit in the light emitting display case as a sliding guide surface.   The sliding guide portion has a plurality of fin shapes protruding in the direction of the heating coil unit, and the protruding end portion of the fin shape serves as a sliding guide surface, and the top by the biasing portion in the light emitting display case. The induction heating apparatus according to claim 5, wherein the sliding guide portion extends in the same direction as the pressing direction against the plate.   4. The light emitting display unit according to claim 3, wherein the light emitting display unit is configured to emit light linearly around the heating coil unit, and a region surrounded by the linear light emission of the light emitting display unit is used as a heating region. Induction heating device. The light emitting display unit includes: a light emitting display case disposed in a space surrounded by at least the heating coil unit; a light emitting element serving as a light emitting source provided in the light emitting display case; and an adjacent light emitting display case. A light guide unit that is provided so as to connect the upper surface, and the upper surface facing the top plate emits light by the light from the light emitting element,
The induction heating apparatus according to claim 7, wherein the sliding guide portion includes a surface that contacts the heating coil unit in the light guide unit as a sliding guide surface.   The sliding guide portion has a function as a light blocking body that blocks light from the light guide unit, and a contact surface with the heating coil unit in the sliding guide portion serves as a sliding guide surface, The induction heating apparatus according to claim 8, wherein the sliding guide surface extends in the same direction as a pressing direction of the urging portion against the top plate.

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