WO2014030315A1

WO2014030315A1 - Induction heater

Info

Publication number: WO2014030315A1
Application number: PCT/JP2013/004797
Authority: WO
Inventors: 富田　英夫; 片岡　章; 北泉　武; 藤濤　知也; 永田　隆二; 相原　勝行; 一義志智; 田中　弘之; 西村　誠
Original assignee: パナソニック株式会社
Priority date: 2012-08-24
Filing date: 2013-08-08
Publication date: 2014-02-27
Also published as: DE112013004163T5

Abstract

This induction heater is configured so that: a large number of heating coil units (2) provided directly under a top plate (6) are pressed by an urging part against the top plate and the direction of vibration of the heating coil units is restricted to a predetermined direction; light-emitting display units (3, 23) for emitting light so as to be visually observable through the top plate are disposed around the heating coil units; a heating controller (22) specifies the heating coil unit to inductively heat an object placed on the top plate; and some of the light-emitting display units disposed around the specified heating coil unit are at least caused to emit light and the heating region is displayed.

Description

Induction heating device

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.

In addition, in the induction heating cooker, a multi-coil configuration in which a large number of heating coils are arranged directly under the top plate has been proposed (see 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 for heating a cooking pan, which is an object to be heated, by a large number of heating coils, for example, there is a heating cooker disclosed in 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 in combination, and a honeycomb shape ( Hexagonal shape) is provided with illumination segments.

Spanish Patent Application No. 2366511 Special table 2008-527294 Japanese Patent No. 4854596 JP 2003-100430 A JP 2010-262884 A

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, there is a problem that it is uncertain whether an object to be heated such as a cooking pan placed on the top plate is reliably heated.

Moreover, in the heating cooker disclosed by patent document 2, when the cooking pan which is a to-be-heated object is mounted on the top plate, along the outer edge of the heating unit covered with the pan bottom of the cooking pan. The lighting segment is activated. However, in the heating cooker disclosed in Patent Document 2, since only the lighting segment of the honeycomb-shaped heating unit covered by the pot bottom of the cooking pan is activated, the user can use the cooking pot pan bottom of the cooking pot. In addition, it is not configured to easily check the activated lighting segment by being blocked by a handle or a lid, and there is a problem in visibility. Therefore, the cooking device disclosed in Patent Document 2 has a problem that the user cannot easily check the heating area in the cooking operation, and is unusable for the user.

Furthermore, in the heating cooker disclosed in Patent Document 1 as described above, in order to achieve a configuration capable of induction heating regardless of the position of the object to be heated placed on the top plate, Is arranged so that a large number of heating coils are laid close together. 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 sway (sway) due to vibrations or impacts during transportation, and the apparatus is reduced in size and thickness. There was also a big problem in achieving this.

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 arranged under a top plate. Is clearly displayed to the user, and an induction heating device that is easy to use and has high reliability is provided.

In addition, the present disclosure can easily assemble an induction heating device having a multi-coil configuration in a simple process, and can prevent the heating coil from swinging (rolling) even when it vibrates. It is an object of the present invention to provide an induction heating device that achieves miniaturization and thickness reduction 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 number of heating coil units that are provided directly below the top plate and that inductively heat an object to be heated placed on the top plate;
A light emitting display unit disposed around each of the heating coil units and emitting light visibly through the top plate;
A heated object detector for detecting that the heated object is placed above each of the heating coil units;
Based on the detection result by the object to be heated detection unit, a heating control unit that controls each operation state of the heating coil unit and each light emission state of the light emitting display unit;
An urging portion that presses the heating coil unit against the back surface side of the top plate,
The light emitting display unit is disposed in a space surrounded by at least the heating coil unit, the light emitting display case is disposed, and the light emitting element serving as a light emitting source provided in the light emitting display case is adjacent to the light emitting display case. A light guide unit that is provided so as to connect between the light emitting display cases, and whose upper surface facing the top plate emits light by light from the light emitting element,
The heating coil units are arranged in a vertical vertical and horizontal row directly under the top plate,
The heating control unit identifies a heating coil unit that is to induction-heat the object to be heated placed on the top plate based on a detection result by the object to be heated detection unit, and the heating control unit of the identified heating coil unit It is configured to display at least a part of the light emitting display units arranged around to display a heating region,
The outer surface of the light guide unit is disposed so as to be in contact with the heating coil unit, and is configured to regulate the vibration direction of the heating coil unit by the biasing portion in a predetermined direction.

The induction heating device according to the present disclosure clearly displays the heating region on the top plate and has an easy-to-use configuration, and can easily assemble a multi-coil configuration through a simple process, even when it vibrates. The heating coil can be prevented from swinging (rolling), miniaturized and thinned, and has 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 taken 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 light emission display unit which were arranged in parallel. Partial sectional view taken along line IX-IX in the induction heating cooker shown in FIG. Partial sectional view taken along line XX in the induction heating cooker 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 top view which shows the state which removed the top plate in the induction heating cooking appliance of Embodiment 3 which concerns on this indication. The top view which shows the structure of the principal part of the induction heating cooking appliance of FIG. FIG. 15 is a schematic cross-sectional view showing a cross-sectional structure of the induction heating cooker viewed from the AA direction in FIG. The block diagram which shows the structure of the induction heating cooking appliance of FIG. The flowchart of the operation method of the induction heating cooking appliance of Embodiment 3 concerning this indication The flowchart of the operation method of the induction heating cooking appliance which concerns on the modification of Embodiment 3. The expanded sectional view which shows the structure of the proximity sensor and operation part of the induction heating cooking appliance of Embodiment 4 which concern on this indication The top view of the whole induction heating cooking appliance of Embodiment 5 concerning this indication Sectional drawing which showed the principal part structure of the induction heating apparatus of Embodiment 6 which concerns on this indication Sectional drawing of the principal part of the induction heating apparatus of Embodiment 6. The perspective view of the principal part of the induction heating apparatus of Embodiment 6. FIG. The perspective view which showed the induction heating apparatus of Embodiment 6. FIG. The perspective view except the top plate which showed the induction heating apparatus of Embodiment 6. FIG. Plan sectional drawing except the heating coil unit in the induction heating apparatus of Embodiment 6. Block diagram showing control elements in the induction heating apparatus of the sixth embodiment

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 number of heating coil units that are provided directly below the top plate and that inductively heat an object to be heated placed on the top plate;
A light emitting display unit disposed around each of the heating coil units and emitting light visibly through the top plate;
A heated object detector for detecting that the heated object is placed above each of the heating coil units;
Based on the detection result by the object to be heated detection unit, a heating control unit that controls each operation state of the heating coil unit and each light emission state of the light emitting display unit;
An urging portion that presses the heating coil unit against the back surface side of the top plate,
The light emitting display unit is disposed in a space surrounded by at least the heating coil unit, the light emitting display case is disposed, and the light emitting element serving as a light emitting source provided in the light emitting display case is adjacent to the light emitting display case. A light guide unit that is provided so as to connect between the light emitting display cases, and whose upper surface facing the top plate emits light by light from the light emitting element,
The heating coil units are arranged in a vertical vertical and horizontal row directly under the top plate,
The heating control unit identifies a heating coil unit that is to induction-heat the object to be heated placed on the top plate based on a detection result by the object to be heated detection unit, and the heating control unit of the identified heating coil unit It is configured to display at least a part of the light emitting display units arranged around to display a heating region,
The outer surface of the light guide unit is disposed so as to be in contact with the heating coil unit, and is configured to regulate the vibration direction of the heating coil unit by the biasing portion in a predetermined direction. In the induction heating apparatus of the first aspect configured as described above, the heating area is clearly displayed on the top plate, and the heating area is not obstructed by the object to be heated. Can be reliably confirmed, and it becomes an easy-to-use and highly reliable heating device. In the induction heating device of the first aspect, for example, even if a vibration state occurs during conveyance, the heating coil unit is restricted to vibration in a predetermined direction without swinging (rolling), so that the heating coil swings. Movement (rolling) can be prevented, miniaturization and thinning can be achieved, and a high reliability and safety can be maintained as a heating device. In the induction heating device of the first aspect, the heating device is an easy-to-use heating device that can easily and clearly recognize the heating region, and the space around the heating coil unit can be used effectively. It becomes.

An induction heating device according to a second aspect of the present disclosure is configured such that the light emitting display unit according to the first 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 may be configured as a heating region. In the induction heating apparatus of the second aspect configured as described above, since the heating area is displayed by a plurality of point light emission on the top plate, the point light emission of several light emitting display units is blocked by the object to be heated. Even if this is done, the user can easily check the heating area, and the heating device is easy to use.

In the induction heating apparatus according to the third aspect of the present disclosure, the heating control unit according to the second aspect is configured such that when the object to be heated is placed on the top plate, the light emitting display unit has at least a rectangular frame. You may comprise so that a heating area | region may be light-emitted and displayed in the position of the vertex of a body. The induction heating device of the third aspect configured in this manner has a rectangular heating area (4) without the user being blocked by an object to be heated, such as a handle or a lid of a general cylindrical cooking pan or the like. It is possible to easily confirm the point light emission of each light emitting display unit, and the heating device is easy to use.

In the induction heating device of the fourth aspect according to the present disclosure, each of the light emitting display units in the third aspect is provided on an upper surface facing the top plate in the light emitting display case, and It may further comprise a membrane sheet having a light emitting region that is irradiated with light after being reflected on a wall surface in the light emitting display case and shines in a dot shape. In the induction heating device of the fourth aspect configured in this way, the heating area emits light in the entire light emitting area of the membrane sheet at the position of the top of the rectangular frame on the top plate. Therefore, the heating region can be easily and clearly recognized without being blocked by the object to be heated, and the heating device is easy to use.

In an induction heating apparatus according to a fifth aspect of the present disclosure, the light-emitting display unit according to the first aspect is configured to emit light linearly around the heating coil unit, and is surrounded by linear light emission. The region may be configured as a heating region. Since the induction heating device of the fifth aspect configured in this way is displayed by emitting light with a linear frame around almost all of the heating region on the top plate, the linear light emission of the light emitting display unit is displayed. Even if a part is obstructed by the object to be heated, the user can easily check the heating region, and the heating device is easy to use.

The induction heating device according to a sixth aspect of the present disclosure is the induction heating apparatus according to the fifth aspect, wherein the heating control unit is configured such that when the object to be heated is placed on the top plate, the light emitting display unit is at least square. You may comprise so that a heating area | region may be light-emitted and displayed in the position of a frame. In the induction heating device of the sixth aspect configured as described above, the heating region emits light in a substantially rectangular frame shape on the top plate, so that the user can handle the object to be heated, for example, a handle such as a cooking pan, A rectangular heating region can be easily confirmed without being blocked by a lid or the like, and the heating device is easy to use.

In an induction heating apparatus according to a seventh aspect of the present disclosure, the heating control unit according to the first to sixth aspects is configured so that the heating is performed according to the temperature of an object to be heated placed on the top plate. You may comprise so that the light emission state of the said light emission display unit which shows an area | region may be controlled. In the induction heating apparatus of the seventh aspect configured as described above, the user can easily and reliably recognize the state of the heating area where the object to be heated is placed, and the heating state of the heating area It becomes the structure which a user can recognize easily.

The induction heating device of the eighth aspect according to the present disclosure is the first aspect,
A sliding guide portion is provided around the heating coil unit and has a sliding guide surface in contact with the heating coil unit and regulates the vibration direction of the heating coil unit by the biasing portion in a predetermined direction. It is good also as a structure. The induction heating device according to the eighth aspect configured as described above can be easily assembled and can prevent the heating coil from swinging (rolling) even when it is vibrated. In addition, it is thin and has high reliability and safety.

The induction heating device of the ninth aspect according to the present disclosure is arranged such that the sliding guide surface of the sliding guide portion in the eighth aspect is in contact with an outer peripheral surface of the heating coil unit, and the heating You may form so that the vibration direction of a coil unit may be controlled in the same direction as the pressing direction with respect to the said top plate by the said urging | biasing part. The ninth aspect of the induction heating apparatus 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 the induction heating device according to the tenth aspect of the present disclosure, the sliding guide unit according to the ninth aspect may be formed in each of the light emitting display units. The induction heating device of the tenth aspect configured as described above has a configuration in which the heating region can be surely seen on the top plate, and the sliding guide portion is provided in the light emitting display unit, so that the space inside the device is Therefore, the heating coil can be prevented from swinging (rolling) and miniaturized and thinned to achieve a highly reliable and safe heating device.

In an induction heating apparatus according to an eleventh aspect of the present disclosure, the light emitting display unit according to the tenth aspect is configured to emit 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 may be configured as a heating region. In the induction heating apparatus of the eleventh aspect configured as described above, since the heating area is displayed by a plurality of point light emission on the top plate, the heating apparatus is easy to use and highly reliable.

In an induction heating device according to a twelfth aspect of the present disclosure, each of the light emitting display units according to the eleventh aspect is provided on an upper surface of the light emitting display case facing the top plate, A membrane sheet having a light emitting region that irradiates light after being reflected on a wall surface in the light emitting display case and shines in a dot shape; and
In the sliding guide portion, a surface in contact with the heating coil unit in the light emitting display case may be configured as a sliding guide surface. In the induction heating apparatus of the twelfth aspect configured as described above, 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 can be reduced in size and thickness, and the heating apparatus has high reliability and safety.

In an induction heating apparatus according to a thirteenth aspect of the present disclosure, the sliding guide portion according to the twelfth aspect has a plurality of fin shapes protruding in the direction of the heating coil unit, and the fin-shaped protrusions An end portion may be a sliding guide surface, and the sliding guide portion may be extended in the same direction as the pressing direction of the urging portion against the top plate in the light emitting display case. The induction heating device of the thirteenth 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. Further, in the induction heating apparatus of the thirteenth 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 apparatus according to a fourteenth aspect of the present disclosure is configured such that the light emitting display unit according to the tenth 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 may be configured as a heating region. In the induction heating apparatus of the fourteenth 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.

In the induction heating device of the fifteenth aspect according to the present disclosure, a surface of the light guide unit in which the sliding guide portion is in contact with the heating coil unit may be configured as a sliding guide surface. . The induction heating device of the fifteenth aspect configured in this manner is integrally formed with the light emitting display unit that displays the heating region on the top plate, so that the size and thickness of the device can be reduced and high. It becomes a heating device having reliability and safety. In the induction heating apparatus of the fifteenth 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 an induction heating apparatus according to a sixteenth aspect of the present disclosure, the sliding guide unit according to the fifteenth aspect has a function as a light blocking body that blocks light from the light guide unit. A contact surface of the sliding guide portion with the heating coil unit may be a sliding guide surface, and the sliding guide surface may extend in the same direction as the pressing direction of the biasing portion against the top plate. Good. In the induction heating device of the sixteenth aspect configured as described above, even when it vibrates, the heating guide swings (rolls) using a member whose sliding guide portion also serves as the light emitting display unit. The heating apparatus can be reliably prevented and has high reliability and safety. In addition, in the induction heating device of the sixteenth aspect, since the sliding guide portion extends in the opposite direction to the top plate, even if the heating coil unit moves greatly downward, the heating coil unit does not shake. This configuration can reliably prevent movement (rolling).

An induction heating device of a seventeenth aspect according to the present disclosure includes an operation display unit disposed below the top plate in the first aspect;
A proximity sensor for detecting the proximity of an object to the operation display unit;
Further comprising
When the proximity sensor detects the proximity of the object to the operation display unit, the heating amount of the heating coil may be controlled.
In the induction heating apparatus configured as described above, when the proximity sensor detects that a cooking utensil such as a pan is placed on the top plate near the operation display unit, the heating coil suppresses the heating amount or performs heating. Stop. As a result, it is possible to suppress the operation display unit from being broken by being heated by a cooking utensil such as a pan and rising in temperature.

The induction heating device according to an eighteenth aspect of the present disclosure may be configured such that, in the seventeenth aspect, the operation display unit also serves as the proximity sensor.

In the induction heating apparatus of the nineteenth aspect according to the present disclosure, in the seventeenth aspect, the proximity sensor may be integrated with the operation display unit.

In the induction heating apparatus according to a twentieth aspect of the present disclosure, in the seventeenth aspect, the proximity sensor may be provided in a region between the operation display unit and the adjacent heating coil. .

In the seventeenth aspect of the induction heating device according to the present disclosure, in the seventeenth aspect, when the proximity sensor detects the proximity of an object to the operation display unit, the operation display unit detects the proximity of the object. You may comprise so that it may display.

The induction heating device of the twenty-second aspect according to the present disclosure may be configured by a touch panel in which the proximity sensor is disposed in the vicinity of the lower surface of the top plate in the seventeenth aspect.

The induction heating device of the twenty-third aspect according to the present disclosure may be the electrostatic electrode provided in the lower surface of the top plate by the proximity sensor in the seventeenth aspect.

The induction heating device of the twenty-fourth aspect according to the present disclosure may be configured by the electrostatic electrode in which the proximity sensor is printed on the lower surface of the top plate in the seventeenth aspect.

The induction heating device of the 25th aspect according to the present disclosure may be an infrared sensor that detects proximity of a heated object in the 17th aspect.

In the induction heating apparatus according to a twenty-sixth aspect according to the present disclosure, in the seventeenth aspect, the proximity sensor may be a temperature sensor.

According to a twenty-seventh aspect of the induction heating device of the present disclosure, in the twenty-sixth aspect, when the temperature sensor detects a temperature exceeding an allowable threshold temperature of the operation display unit, the heating coil is heated. You may comprise so that quantity may be controlled.

The induction heating device according to a twenty-eighth aspect of the present disclosure may be the piezoelectric element according to the seventeenth aspect, in which the proximity sensor detects pressurization by an object placed on the top plate. .

The induction heating device of the twenty-ninth aspect according to the present disclosure is that, in the seventeenth aspect, when the proximity sensor detects the proximity of an object when heating is performed by a heating coil adjacent to the operation display unit, You may comprise so that the heating amount of the said adjacent heating coil may be controlled.

The induction heating apparatus according to a thirtieth aspect of the present disclosure further includes a cooling unit that cools the operation display unit according to the seventeenth aspect,
When proximity of an object is detected by the proximity sensor, the cooling capacity of the cooling unit may be increased. With the above configuration, the operation display unit is further strongly cooled, so that it is possible to suppress the operation display unit from being heated and heated by a cooking utensil such as a pan to break.

The induction heating apparatus according to a thirty-first aspect of the present disclosure is the above thirty-third aspect, wherein the proximity sensor detects the proximity of an object when heating is performed by a heating coil adjacent to the operation display unit. The cooling capacity of the cooling means may be increased.

The induction heating apparatus of a thirty-second aspect according to the present disclosure is the thirty-third aspect, in which the proximity sensor is a temperature sensor, and the temperature sensor exceeds an allowable threshold temperature of the operation display unit. When the temperature is detected, the cooling capacity of the cooling means may be increased.

In the induction heating apparatus according to a thirty-third aspect of the present disclosure, in the seventeenth aspect, the operation display unit may be configured by overlapping an operation unit on a liquid crystal display unit. According to the above configuration, since the operation unit and the liquid crystal display unit are integrated, the operation and the display are easy to see and understand at the same time, and the usability is good.

In the induction heating apparatus according to a thirty-fourth aspect of the present disclosure, in the thirty-third aspect, the operation unit may be configured by a touch panel disposed on the liquid crystal display unit. With the above configuration, the operation unit and the proximity sensor can be simplified.

In an induction heating apparatus according to a thirty-fifth aspect according to the present disclosure, in the thirty-third aspect, the operation unit may be an electrostatic electrode provided on a lower surface of the top plate.

In the induction heating apparatus according to a thirty-sixth aspect of the present disclosure, in the thirty-third aspect, the operation unit may be configured with an electrostatic electrode printed on a lower surface of the top plate. With the above configuration, the operation unit and the proximity sensor can be simplified. Moreover, since the electrostatic electrode is a metal, it is more excellent in heat resistance.

In an seventeenth aspect of the induction heating device according to the present disclosure, in the seventeenth aspect, the operation display is performed when the proximity sensor continuously detects the proximity of an object to the operation display unit over a predetermined period. You may comprise so that the proximity | contact of an object may be displayed on a part.

In the induction heating apparatus according to a thirty-eighth aspect of the present disclosure, in the seventeenth aspect, the heating coil may include a plurality of heating coils.

An induction heating apparatus according to a 39th aspect according to the present disclosure is the base according to the first aspect, in which the heating coil unit is installed via the urging unit,
Cooling means for generating cooling air, and
The urging portion has a first end winding sandwiched between the heating coil unit and a non-conductive attachment member, and a second end winding attached to the base, and the heating coil unit May be configured to radiate heat from the heating coil unit by receiving cooling air from the cooling means.

In the induction heating apparatus configured as described above, in the magnetic flux generated from the heating coil, the magnetic flux on the lower side of the heating coil can generally be largely canceled out by ferrite, but some leakage of magnetic flux is inevitable. . However, since the biasing portion, for example, the compression coil spring is linear and not in a loop shape (ring shape), the leakage magnetic flux cannot form an eddy current in the compression coil spring, and the compression coil spring self-heats. There is nothing.

On the other hand, the urging portion (compression coil spring) is sandwiched between the lower surface of the heating coil unit and the mounting member so as to make surface contact with the surface of the wire rod of the first end winding to secure a heat transfer area. For this reason, the urging portion (compression coil spring) acts as a radiating fin that radiates heat generated by the loss of the heating coil unit through the first end winding.

Since the cooling air from the cooling means cools the lower surface of the heating coil unit and the urging portion (compression coil spring), the temperature rise of the heating coil unit can be suppressed. As a result, in order to prevent an abnormal temperature rise, it becomes unnecessary to perform control such as control for narrowing the input of the heating coil unit or control for increasing the air flow rate, and the induction heating device is easy to use.

Also, since the urging portion (compression coil spring) presses the heating coil unit against the top plate, no space is generated between the heating coil unit and the object to be heated. Therefore, it is not necessary to set an extra magnetic flux in the heating coil unit in consideration of such a space, and the heating coil unit can be configured compactly.

A 40th aspect of the induction heating device according to the present disclosure is the 39th aspect, in which a heat conductive member is filled between the lower surface of the heating coil unit that sandwiches the first end turn and the mounting member. May be. By comprising in this way, a 1st end winding is reliably connected mutually with the lower surface and attachment member of a heating coil unit, and it becomes easier to transfer heat from a heating coil unit to a 1st end winding. As a result, the heat generated by the loss of the heating coil unit is efficiently conducted to the first end winding of the urging portion (compression coil spring).

That is, the urging portion (compression coil spring) functions sufficiently as a heat radiating fin. And since the cooling air from a cooling means cools the lower surface and compression coil spring of a heating coil unit, the temperature rise of a heating coil unit can be suppressed.

An induction heating device of a forty-first aspect according to the present disclosure is the above-described thirty-ninth or forty-first aspect, wherein the light emitting display unit is provided so as to narrow the space in a space surrounded by the plurality of heating coils. The light emitting display unit may be configured as a cooling air guide. With this configuration, after the cooling air from the cooling unit collides with the light emitting display unit as the guide body, it flows along the side wall surface of the light emitting display unit, and toward the center of the lower surface of the heating coil unit. Flowing.

That is, the cooling air from the cooling means reliably cools the lower surface of the heating coil unit and the urging portion (compression coil spring), and prevents a wasteful flow in the space surrounded by the plurality of heating coil units. Can do. Since the cooling air efficiently cools the lower surface of the heating coil unit and the urging portion (compression coil spring), the cooling means can be made compact.

The induction heating device of the forty-second aspect according to the present disclosure is the above-described thirty-ninth aspect, wherein the attachment member is a planar member and may be configured to be in surface contact with the lower surface of the heating coil unit. . By configuring in this way, the lower surface of the heating coil unit and the flat surface of the mounting member are in surface contact with each other and a heat transfer surface is newly formed. Therefore, the urging portion (compression coil spring) is provided with the heating coil unit. The heat generated by the loss can be received from the plane of the mounting member via the first end winding and can be sufficiently dissipated.

And since the cooling air from a cooling means cools the lower surface and urging | biasing part (compression coil spring) of a heating coil unit, the temperature rise of a heating coil unit can be suppressed.

Hereinafter, an embodiment of the 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 not intended to limit the subject matter described in the claims. Absent.

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 is configured with a 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 cooking device of 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 sectional view taken along line IV-IV in the induction heating cooker shown in FIG. 1, and FIG. 5 is a partial sectional view taken along line VV 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 disposed 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 in intimate contact with the top plate 6 constantly through 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 used efficiently, 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 formed of, for example, a white resin material and have a surface that can reflect 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 prevention of shaking, it is possible to achieve downsizing and thinning.

<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.

Also, when the activation signal is input, the heating control unit 6 causes the heated object detection unit 21 to execute a detection operation for detecting whether or not the heated object is placed in each heating coil unit 2. 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 addition, in the light emission display unit 3, the structure light-emitted in the cross shape which is the shape which protruded in four directions substantially as point light emission was demonstrated. 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 the heatable area before the heating area is displayed. You may make it emit light.

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, light emitting display units 23, and the like provided immediately 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.

In addition, in the induction heating cooker of the second embodiment, the light emitting display unit 23 configured in a lattice shape so as to surround each heating coil unit 2 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 cut at a substantial center of the heating coil unit 2. In FIG.11 and FIG.12, the structure of the one heating coil unit 2 and the light emission display unit 23 arrange | positioned at the both sides is shown.

<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.

For example, transparent crystallized glass is used for the top plate 6 in the induction heating cooker according to the second embodiment, 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 shield 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. Therefore, it is possible to achieve a reduction in size and thickness as well as prevention of swinging (rolling) of the heating coil.

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.

Note that the top plate 6 does not necessarily have to be printed with a black film on the back surface of transparent crystallized glass, and may have a configuration in which the glass itself is 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.

(Embodiment 3)
Hereinafter, an induction heating cooker will be described as an example of the induction heating device according to the third to fifth embodiments according to the present disclosure. In Embodiments 3 to 5, an induction heating cooker having an operation display unit on the lower surface of the top plate in the configuration of Embodiments 1 and 2 will be described. First, the problem which the inventor discovered in the induction heating cooking appliance comprised in this way is demonstrated.

As a conventional induction heating cooker, for example, a heating cooker is known in which a part of the top surface is an observation window made of a transparent material and a liquid crystal display device is provided below the observation window (see, for example, Patent Document 3). . There is also known an induction heating cooker that supplies a high-frequency current only to a heating coil that has detected that an object to be heated has been placed thereon (see, for example, Patent Document 4).

In addition, in recent years, an induction heating cooker is also known for a configuration including four or more heating coils (see, for example, Patent Document 4).

When a liquid crystal display device is used as the display unit, the liquid crystal display device is vulnerable to heat and may be damaged even at about 60 ° C. to 70 ° C. For this reason, if an object to be heated such as a heated pan is placed close to the liquid crystal display device, the liquid crystal display device may be damaged.

Also, there is a case where an operation display unit is configured by overlapping an operation unit made of an electrostatic touch panel on a liquid crystal display device and arranged in contact with the lower surface of the top plate. Since the touch panel is made of resin, the heat resistance is not sufficient, and when a cooking utensil such as a hot pot is close to the touch panel, there is a high possibility that the touch panel is broken due to a temperature rise. In particular, in a multi-coil in which a large number of heating coils are arranged, cooking utensils can be relatively freely arranged, so that cooking utensils such as pots may be placed close to the operation display unit. Furthermore, in the multi-coil, there is a case where the operation display unit is arranged surrounded by the heating coil (see, for example, Patent Document 3), and there are many opportunities for a cooking utensil such as a pan to be close to the display unit (operation unit). Become.

However, in the conventional induction heating cooker, since the display unit (liquid crystal display device) and the heating coil are arranged at a certain distance in a plane, the display unit is affected by a heated object such as a pan. No particular consideration was given.

Therefore, in particular, in the induction heating apparatus according to the third to fifth embodiments according to the present disclosure, the problems in the conventional induction heating cooker as described above are solved, and are arranged below the top plate. An induction heating cooker having an operation display unit that can suppress an object to be heated, such as a heated pan, placed near the operation display unit is provided. .

In the induction heating cooker that is the induction heating device according to the third to fifth embodiments of the present disclosure, a top plate, a heating coil disposed below the top plate, and a position below the top plate An operation display unit, and a proximity sensor that detects the proximity of an object to the operation display unit,
When the proximity sensor detects the proximity of an object to the operation display unit, the heating amount of the heating coil is controlled.

According to the induction heating cookers of the third to fifth embodiments configured as described above, when the proximity sensor detects the proximity of an object to the operation display unit, the heating amount of the heating coil is controlled. As a result, the operation display unit can be prevented from being damaged by being heated by a heated object such as a pan.

Hereinafter, first, an example of an induction heating cooker which is an induction heating apparatus according to Embodiment 3 will be specifically described with reference to the accompanying drawings.

FIG. 15 is a plan view showing a state where the top plate is removed from induction heating cooker 110 of the third embodiment. FIG. 16 is a plan view illustrating a schematic configuration of the operation display unit in the induction heating cooker 110. FIG. 17 is a schematic cross-sectional view showing a cross-sectional structure of the induction heating cooker 110 viewed from the AA direction in FIG. FIG. 18 is a block diagram illustrating the configuration of the induction heating cooker 110.
The induction heating cooker 110 according to the third embodiment includes a top plate 111, a heating coil (heating coil unit) 117, an operation display unit 115 configured by overlapping a liquid crystal display unit 113 and an operation unit 114, and a proximity sensor. 116. The heating coil 117, the operation display unit 115, and the proximity sensor 116 are accommodated in the housing 112 and are disposed below the top plate 111. The proximity sensor 116 is provided in a region between the operation display unit 115 and the adjacent heating coil 117, and detects the proximity of an object to the operation display unit 115. When the proximity sensor 116 detects the proximity of an object to the operation display unit 115, the heating amount of the heating coil 117 can be controlled. As a result, even when an object approaches the operation display unit 115, heating from the heating coil 117 to the object can be suppressed, and the influence of the operation display unit 115 due to heat can be suppressed.

Further, when the proximity sensor 116 detects the proximity of the object to the operation display unit 115, the operation display unit 115 may display the proximity of the object. Thereby, the user can be notified of the proximity of the object to the operation display unit 115.

Further, the operation display unit 115 may be provided with a cooling fan (cooling means) 118. Furthermore, a control unit 130 that controls the heating coil 117, the operation display unit 115, the proximity sensor 116, and the cooling fan 118 may be provided. The control unit 130 does not need to be provided independently, and may be realized by a circuit that drives the heating coil 117 or a configuration that also serves as the operation display unit 115.

Hereinafter, each structural member which comprises the induction heating cooking appliance 110 of Embodiment 3 is demonstrated.

<Top plate>
The top plate 111 is placed on the upper surface of the housing 112 and is used to place a cooking utensil (a heated object) such as a pan. For example, the top plate 111 is formed by printing a transparent film or the like on the lower surface of a transparent crystallized glass. The top plate 111 looks black to the user, but emits light to transmit light. There is no problem in practical use of the (light guide unit) 121 and the temperature sensor 122 using infrared rays. In particular, since black printing is not performed on the surface facing the operation display unit 115, the top plate 111 on this surface portion is transparent. The top plate 111 does not necessarily have to be printed black on the lower surface of the transparent crystallized glass, and may be colored on the glass itself. However, since the visibility of the operation display unit 115 is deteriorated, it is necessary to devise a display method (for example, increase the luminance of the liquid crystal display unit 113).

<Case>
The casing 112 constitutes the appearance of the induction heating cooker 110 of the third embodiment, and the induction heating cooker 110 is configured by covering the top surface of the casing 112 with the top plate 111. Further, inside the housing 112, an operation display unit 115 configured by overlapping a liquid crystal display unit 113 and an operation unit 114, a proximity sensor 116, 45 heating coils 117, a cooling fan 118 as a cooling means, a heating coil A circuit (not shown) for driving 117 is accommodated.

<Heating coil (heating coil unit)>
The heating coil 117 in the heating coil unit is pressed against the lower surface of the top plate 111 by a compression coil spring (biasing portion) 120 as an urging means. The heating coil 117 may be one mouth, two mouths, or three mouths. Alternatively, it may be a multi-coil that can heat an object to be heated such as one pot by a plurality of heating coils 117. For example, as shown in the plan view of FIG. 15, 45 heating coils 117 may be provided. Further, as shown in FIG. 15, the heating coil 117 (heating coil unit) is arranged only on the back side (upper side in FIG. 15) with respect to the operation display unit 115 with the side of the operation display unit 115 open. May be. By opening the side of the operation display unit 115 (the left and right side regions in FIG. 15), the possibility that the object to be heated is arranged close to the operation display unit 115 can be reduced.

In addition, as shown in the plan view of FIG. 22 described in Embodiment 5 described later, the heating coils 117 are arranged in all three directions on the side and back side (upper side in FIG. 22) of the operation display unit 115. May be. As described above, by arranging the heating coils 117 on the three sides of the operation display unit 115, the planar portion of the top plate 111 can be widely used as a heating region.
In the induction heating cooker 110 of the third embodiment, when the proximity sensor 116 detects the proximity of an object to the operation display unit 115, the heating amount of the heating coil 117 is controlled.

Further, when heating is performed by the heating coil 117 adjacent to the operation display unit 115, even when the proximity sensor 116 detects the proximity of an object, the heating amount of the adjacent heating coil 117 being heated is controlled. Good.
In addition, when it is detected in the heating coil 117 adjacent to the operation display unit 115 that an object that is an object to be heated is heated, simultaneously, when the proximity sensor 116 detects the proximity of the object to the operation display unit 115 It is considered that an object heated by the heating coil 117 is close to the operation display unit 115. Therefore, in addition to the detection of the object by the proximity sensor 116, the proximity of the object to the operation display unit 115 is more reliably detected by detecting the heating of the object to be heated by the heating coil 117 adjacent to the operation display unit 115. be able to.

<Light emitting part>
In addition, a light emitting unit (light guide unit) 121 that is provided so as to surround the heating coil 117 and emits light may be provided. By causing the light emitting unit 121 surrounding the operating heating coil 117 to emit light, it is possible to visually grasp the heating coil 117 in which the user is operating. In particular, when the heating coil 117 is a multi-coil, it becomes easy to visually grasp the operating heating coil.
In addition, the light emission part (light guide unit) 121 is arbitrary structures in the induction heating cooking appliance 110 of Embodiment 3, and is not an essential structure.

<Operation display section>
The operation display unit 115 is configured by overlapping a liquid crystal display unit 113 and an operation unit 114. The operation display unit 115 is biased to the lower surface of the top plate 111 by a compression coil spring (biasing unit) 119. That is, since the gap between the operation unit 114 and the user's finger is narrow and stable at a predetermined interval, the operation unit 114 can be configured with high sensitivity, and the operation unit 114 is easy to use.
Further, in the plan view of FIGS. 15 and 22, the operation display unit 115 is arranged with only one operation display unit 115 in the area on the center front side (lower side in FIG. 15) of the top plate 111. For example, the operation display unit 115 may be provided in one of the left and right regions of the top plate 111. Further, the operation display unit 115 is not limited to one, and a plurality of operation display units 115 may be arranged.

<Liquid crystal display>
As the liquid crystal display unit 113, a normal liquid crystal display panel can be used. When the proximity sensor 116 detects the proximity of the object to the operation display unit 115, the proximity of the object may be displayed on the liquid crystal display unit 113. Further, when the proximity sensor 116 continuously detects the proximity of the object to the operation display unit 115 for a predetermined period, the proximity of the object may be displayed on the operation display unit 115.

<Operation unit>
The operation unit 114 includes a capacitive touch panel 123 disposed in contact with the lower surface of the top plate 111. For example, ITO (indium tin oxide) is used as a transparent electrode and wired in a vertical and horizontal matrix as shown in FIG. 16 to detect which part of the touch panel 123 is touched by a finger, and the liquid crystal display unit 113 It is linked with the displayed operation key. The vertical and horizontal matrix wirings are electrically separated by an insulating material or the like.

<Proximity sensor>
The proximity sensor 116 is provided in a region between the operation display unit 115 and the adjacent heating coil 117, and detects the proximity of an object to the operation display unit 115. As the proximity sensor 116, for example, a capacitive touch panel 124 disposed in a region between the liquid crystal display unit 113 and the adjacent heating coil 117 </ b> A, and a space 116 a through which air passes through the lower surface of the top plate 111. It is supported by the support plate 125 so as to form. That is, since the space 116a is thermally insulated from the top plate 111, the temperature increase of the proximity sensor 116 (touch panel 124) can be suppressed.

The proximity sensor 116 (touch panel 124) and the operation unit 114 (touch panel 123) may be configured by the same heat-resistant member, and the operation unit 114 may also function as the proximity sensor 116. That is, the operation unit 114 and the proximity sensor 116 may be integrated. Alternatively, the function of the proximity sensor 116 may be realized by slightly projecting the operation unit 114 in the direction of the heating coil 117A. Then, the number of parts can be reduced, and a significant cost reduction can be achieved.

Further, in the case where the operation unit 114 is configured to also function as the proximity sensor 116, the proximity sensor 116 does not protrude in the direction of the heating coil 117A, and also functions as the operation unit 114 only on the liquid crystal display unit 113. May be provided. For example, the operation unit 114 made of an electrostatic electrode can be configured to function as the proximity sensor 116. In the detection method based on electrostatic capacitance, a change in the discharge state from the electrostatic electrode is detected, and the change in the discharge state occurs only when an object such as a pan approaches the vicinity of the electrostatic electrode. Can play a role.

Furthermore, the proximity sensor 116 is not limited to a capacitive type such as a touch panel. The proximity sensor 116 may be, for example, an infrared sensor that detects the proximity of a heated object. The proximity sensor 116 may be a temperature sensor 122 such as a thermistor or a thermocouple. When the proximity sensor 116 is a temperature sensor, the heating amount of the heating coil 117 is controlled when the temperature sensor detects a temperature that exceeds the allowable threshold temperature of the operation display unit 115. Further, the proximity sensor 116 may be a piezoelectric element that detects pressurization by an object.

In addition, in the induction heating cooker 110 of the third embodiment, the proximity sensor 116 detects the proximity of the object to the operation display unit 115. Furthermore, in addition to the detection of the proximity of the object to the operation display unit 115 by the proximity sensor 116, it may be determined whether the following two conditions a) and / or b) are satisfied.

A) The heating of the object to be heated by the heating coil 117 adjacent to the operation display unit 115 is detected. When the impedance in the circuit including the heating coil 117 changes depending on the presence of an object to be heated such as a pan on the heating coil 117, the value of the current flowing through the heating coil 117 changes. Therefore, the value of the current flowing through the heating coil 117 of Embodiment 3 can be measured to detect the heating of the object to be heated by the heating coil 117. Note that the method for detecting the heating of the object to be heated by the heating coil 117 is not limited to the above method.

B) The proximity sensor 116 detects the proximity of the object to the operation display unit 115 at predetermined time intervals.

When the heating of the object to be heated by the heating coil 117 adjacent to the operation display unit 115 of a) is detected, and at the same time, when the proximity sensor 116 detects the proximity of the object to the operation display unit 115, It is considered that the object heated by the heating coil 117 is close to the operation display unit 115. Therefore, in addition to the detection of the object by the proximity sensor 116, the proximity of the heated object to the operation display unit 115 is more reliably detected by detecting the heating of the heated object by the heating coil 117 adjacent to the operation display unit 115. Can be detected.
Further, the detection of the proximity of the object to the operation display unit 115 by the detection at every predetermined time in the above b) can be accurately detected by eliminating malfunction.

<Cooling means>
For example, a cooling fan 118 can be used as the cooling means. As shown in the cross-sectional view of FIG. 17, the cooling fan 118 is provided below the operation display unit 115, and cools the operation display unit 115 by blowing air from below, for example, as indicated by an arrow. The proximity sensor 116 (touch panel 124) is cooled by the wind passing through 116a. The direction of the wind flow indicated by the arrow is an example, and the direction of the wind is not limited. When the proximity of an object to the operation display unit 115 is detected, the cooling capacity of the cooling fan 118 may be increased. In particular, there is no problem even if the number of rotations of the cooling fan 118 is increased for a short time. Further, when the proximity sensor 116 detects the proximity of an object when heating is performed by the heating coil 117 adjacent to the operation display unit 115, the cooling capacity of the cooling fan 118 may be increased. Alternatively, when the temperature sensor 122 detects a temperature exceeding the allowable threshold temperature of the operation display unit 115, the cooling capacity of the cooling fan 118 may be increased.
The cooling means is not limited to the cooling fan 118, and a heat pump or the like may be used.

<Control unit>
The control unit 130 controls the heating coil 117, the operation display unit 115, the proximity sensor 116, and the cooling fan 118.
The control unit 130 does not need to be provided independently, and may be realized by a circuit that drives the heating coil 117 or a configuration that also serves as the operation display unit 115.

<Operation method of induction heating cooker>
FIG. 19 is a flowchart of an operation method of induction heating cooker 110 of the third embodiment.
(A) The operation of the proximity sensor 116 is started (S01).
(B) The output of the heating coil 117 is set (S02).
(C) The proximity sensor 116 detects the proximity of the object (S03). Note that proximity detection of an object by the proximity sensor 116 may be performed at regular intervals or continuously. In the case where the proximity detection is continuously performed, it may be determined that the object is approaching when the proximity of the object is detected continuously for a predetermined time. Further, the proximity of an object may be detected using a plurality of proximity sensors 116 simultaneously or sequentially. By using a plurality of proximity sensors 116, the accuracy of proximity detection of an object can be increased.
(D) When the proximity sensor 116 detects the proximity of an object to the operation display unit 115, the output of the heating coil 117 is controlled (S04). In this case, the heating amount may be reduced or zero.
(E) After S04, the proximity of the object is displayed on the operation display unit 115 (S05). Thereafter, the process returns to the object proximity detection step (S03) by the proximity sensor 116.
(F) On the other hand, when the proximity sensor 116 does not detect the proximity of the object to the operation display unit 115, the output of the heating coil 117 is matched with the set output (S06). This is because, as a result of controlling the heating amount, it may be lowered from the set output, so that the original set output is restored.
(G) After S06, the display on the operation display unit 115 is set to the normal display (S07). Thereafter, the process returns to the object proximity detection step (S03) by the proximity sensor 116.
As described above, the proximity of the object to the operation display unit 115 can be detected, and damage to the operation display unit 115 due to heat can be suppressed.

<Modification>
FIG. 20 is a flowchart of the operation method of the induction heating cooker according to the modification of the third embodiment. In this modification, compared with the flowchart of FIG. 19, when the proximity of an object to the operation display unit 115 is detected, the cooling capacity of the cooling fan (cooling means) 118 that cools the operation display unit 115 is increased. Is different.
(A) The operation of the proximity sensor 116 is started (S11).
(B) The output of the heating coil 117 is set (S12).
(C) The proximity sensor 116 detects the proximity of the object (S13).
(D) When the proximity sensor 116 detects the proximity of the object to the operation display unit 115, the output of the heating coil 117 is controlled (S14).
(E) After S14, the proximity of the object is displayed on the operation display unit 115 (S15).
(F) After S15, the capacity of the cooling fan (cooling means) 118 is increased (S16). Thereafter, the process returns to the object proximity detection step (S13) by the proximity sensor 116.
(G) On the other hand, when the proximity sensor 116 does not detect the proximity of the object to the operation display unit 115, the output of the heating coil 117 is adjusted to the set output (S17).
(H) After S17, the display on the operation display unit 115 is set to the normal display (S18).
(I) After S18, the capacity of the cooling fan (cooling means) 118 is returned to normal. Thereafter, the process returns to the object proximity detection step (S13) by the proximity sensor 116.
As described above, the proximity of the object to the operation display unit 115 can be detected, and damage to the operation display unit 115 due to heat can be suppressed. In this case, when the proximity of the object to the operation display unit 115 is detected, the cooling capacity of the cooling fan (cooling means) 118 is increased, so that the operation display unit 115 can be cooled more quickly, and the operation display unit 115 Damage caused by heat can be further suppressed.

(Embodiment 4)
FIG. 21 is a partial cross-sectional view illustrating configurations of the proximity sensor 127 and the operation unit 126 of the induction heating cooker 110a according to the fourth embodiment of the present disclosure. Also in FIG. 21, the flow of the cooling air is indicated by arrows as in FIG. The direction of the wind flow indicated by the arrows is an example and does not limit the wind flow.
Compared with the induction heating cooker of the third embodiment described above, the induction heating cooker 110a of the fourth embodiment includes the operation unit 126 and the proximity sensor 127 that are translucent static printed on the lower surface of the top plate 111. The difference is that they are integrated by the electric electrode 128.

As described above, the operation unit 126 and the proximity sensor 127 are configured by the translucent electrostatic electrode 128 printed on the lower surface of the top plate 111, so that the base material is not the resin but the crystallized glass of the top plate 111. Therefore, heat resistance can be improved and damage to the proximity sensor 127 can be further suppressed even when an object to be heated such as a pan comes close.
The electrostatic electrode 128 is arranged not only on the upper surface of the liquid crystal display unit 113 but also the gap between the heating coil 117A adjacent to the liquid crystal display unit 113 and the liquid crystal display unit 113. If the proximity of an object such as a pan can be detected, the electrostatic electrode 128 may be only the upper surface of the liquid crystal display unit 113. That is, the operation unit 126 including the electrostatic electrode 128 may further function as the proximity sensor 127. In general, in the detection method based on electrostatic capacity, the change in the discharge state from the electrostatic electrode 128 is detected, and the change in the discharge state occurs only when an object such as a pan approaches the vicinity of the electrostatic electrode 128. It can serve as a proximity sensor 127.

(Embodiment 5)
FIG. 22 is a plan view of the entire induction heating cooker 110b according to the fifth embodiment of the present disclosure.
In the induction heating cooker 110b of the fifth embodiment, compared to the induction heating cooker of the third embodiment described above, not only the operation display unit 115 but also all three sides including the side of the operation display unit 115 are heated. The difference is that the coil 117 is disposed. Moreover, the induction heating cooker 110b of Embodiment 5 is the point which has arrange | positioned the

proximity sensors

136a, 136b, and 136c between the operation display part 115 and the three heating coils 117 surrounding the operation display part 115, respectively. This is different from the induction heating cooker of the third embodiment.

In the induction heating cooker 110b according to the fifth embodiment, the

proximity sensors

136a, 136b, and 136c are arranged in three directions surrounding the operation display unit 115. Therefore, from the respective directions of the three heating coils 117 surrounding the operation display unit 115. The proximity of the object to be heated can be detected.

(Embodiment 6)
Hereinafter, the induction heating apparatus according to the sixth embodiment of the present disclosure will be described. In the sixth embodiment, in particular, the cooling configuration of the biasing means in the configuration of the first to fifth embodiments will be described. First, the problem which the inventor discovered in the induction heating cooking appliance comprised in this way is demonstrated.

A conventional induction heating apparatus includes a top plate on which a cooking container is placed, a heating coil for heating the cooking container below the top plate, a plurality of ferrites disposed below the heating coil, and the heating coil. A coil unit including a coil base disposed below, a heat radiating plate for directly mounting the coil unit, and a blower for cooling the heat radiating plate with cooling air (for example, a patent) Reference 5).

To explain the operation in the above configuration, when the cooking container is placed on the top plate, the heating coil is energized, the magnetic flux generated from the heating coil generates an eddy current on the bottom surface of the cooking container, and the cooking container self-heats ( Joule heat) to a predetermined temperature.

However, in the conventional induction heating apparatus, the lower magnetic flux generated from the heating coil is largely canceled out by the ferrite, but the leaked magnetic flux forms an eddy current in the heat sink and self-heats. Was. That is, the cooling effect of the heating coil is deteriorated due to the self-heating of the heat radiating plate, and measures such as reducing the input of the heating coil or increasing the air flow rate are necessary, and the usability of the induction heating device is deteriorated.

Furthermore, since the heating coil is only installed on the lower surface of the top plate, there may be a space between the heating coil and the cooking container, and this space reduces the induction heating efficiency to the cooking container. There was a problem that a large amount of magnetic flux had to be set.

As a result, the heating coil becomes large, and the amount of magnetic flux leaking from the heating coil increases (the rate at which the magnetic flux leaks does not change), because it must be set so as to generate extra magnetic flux from the heating coil. The self-heating of the heat sink increases.

Therefore, the induction heating apparatus according to the sixth embodiment of the present disclosure solves the problems in the conventional induction heating apparatus as described above, improves the cooling performance of the heating coil, and provides an easy-to-use induction heating apparatus. It is to provide.

In the induction heating apparatus according to the sixth embodiment of the present disclosure, a top plate on which an object to be heated is placed, a plurality of heating coil units that are provided below the top plate and induction-heat the object to be heated, A heating coil unit comprising a base installed via a compression coil spring (biasing part) which is an urging means, and a cooling means for generating cooling air;
The compression coil spring has a first end coil sandwiched between the heating coil unit and a non-conductive attachment member, and a second end coil attached to the base, and the heating coil unit Is pressed against the top plate and receives heat from the cooling means to dissipate heat from the heating coil unit.

In the induction heating device of the sixth embodiment configured as described above, the compression coil spring (biasing portion) that is the urging means is linear and does not have a loop shape (ring shape). The magnetic flux cannot form an eddy current in the compression coil spring, and the compression coil spring does not self-heat.

Further, the compression coil spring (biasing part) as the urging means acts as a heat radiating fin for radiating heat due to the loss of the heating coil unit through the first end winding of the compression coil spring. Since the cooling air from the cooling means cools the heating coil unit and the compression coil spring, the temperature rise of the heating coil unit can be suppressed.

On the other hand, since the compression coil spring is configured to press the heating coil unit against the top plate, there is no space between the heating coil unit and the object to be heated. Therefore, since it is not necessary to set an extra magnetic flux in the heating coil unit in consideration of such a space, the heating coil unit can be configured compactly.

In the induction heating apparatus according to the sixth embodiment of the present disclosure, since the compression coil spring that is not affected by the leakage magnetic flux acts as a heat radiation fin, the cooling performance of the heating coil unit can be improved.

Hereinafter, an example of the induction heating apparatus according to the sixth embodiment of the present disclosure will be specifically described with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

FIG. 23 is a cross-sectional view showing the main configuration of the induction heating apparatus according to the sixth embodiment. FIG. 24 is an enlarged cross-sectional view showing a main part of the induction heating apparatus according to the sixth embodiment. FIG. 25 is an enlarged perspective view showing a part of the heating coil unit, the compression coil spring, and the like in the induction heating apparatus of the sixth embodiment. FIG. 26 is a perspective view showing the induction heating apparatus of the sixth embodiment. FIG. 27 is a perspective view of the induction heating device according to Embodiment 6 except for the top plate. FIG. 28 is a plan cross-sectional view excluding the heating coil unit showing the main configuration of the induction heating apparatus of the sixth embodiment.

As shown in FIGS. 23 to 28, the top plate 201 is for placing a heated object 202 that is a cooking container such as a pan or an iron plate, and the top plate 201 is placed on the upper surface of the main body housing 203. Thus, the internal structure of the main body housing 203 is accommodated.

Inside the main body housing 203, there are an operation display unit 204 in which a touch panel is superimposed on a liquid crystal display unit, 45 heating coil units 205 arranged in a grid (5 rows in the front and rear, 9 rows in the left and right), and a flat plate shape. Base 206, a heating control unit 207 that controls an inverter circuit that drives the heating coil unit 205, and a heated object detection unit that detects the presence or absence of the heated object 202 on the top plate 201 based on the current flowing through the inverter circuit. 208 and a microcomputer that executes a program that realizes the operation of the heating control unit 207 and the heated object detection unit 208 are accommodated.

Note that the inverter circuit and the microcomputer housed in the main body housing 203 as described above are not shown in FIGS.

The heating coil unit 205 includes a heating coil base 210 made of a non-conductive material with a built-in ferrite 209, a heating coil 211 wound with a copper wire,

mica plates

212 and 213, and the like.

Further, inside the main body housing 203, a light emitting display unit 226 surrounded by four heating coil units 205 on the front, rear, left and right sides, and a light emitting unit (light guide unit) provided between two adjacent heating coil units 205. ) 225, a compression coil spring 214 which is an urging portion provided below each heating coil unit 205, and a cooling means (cooling unit) 219 for cooling the inside of the main body housing 203.

Each light emitting display unit 226 is connected to four light emitting units (light guiding units) 225. The light emitting display unit 226 is provided with an LED at a portion where the light emitting unit 225 is connected. Light from the LEDs provided in the light emitting display unit 226 passes through the light guide unit that is a light guide and is emitted upward from the light emitting unit 225 through the top plate 1.

The compression coil spring 214 that is an urging portion is non-conductive with the lower surface of the heating coil unit 205 so that the surface of the wire of the first end winding 215 that is the end coil on the top plate side (upper side) is in surface contact. It is sandwiched between a circular flat mounting member 216 made of a material. The second end winding 217, which is the other end coil (downward side) of the compression coil spring 214, is fixed to the base 206 by a fixing bracket 218. A heat conduction member (not shown) is filled between the lower surface of the heating coil unit 205 that sandwiches the first end winding 215 of the compression coil spring 214 and the attachment member 216. Therefore, the lower surface of the heating coil unit 205, the first end winding 215 of the compression coil spring 214, and the attachment member 216 are configured to conduct heat quickly.

The cooling means (cooling unit) 219 includes a blower fan 220 and a duct 221, and presses the heating coil unit 205 against the top plate 201 in the direction of the plurality of heating coil units 205 arranged in a lattice pattern. Cooling air is blown out toward the compression coil spring 214 which is the urging portion.

Note that, as shown in FIG. 28, an intake port 222 for taking in outside air and an exhaust port 223 through which the cooled cooling air is exhausted are provided on the bottom surface of the main body housing 203. Inside the main body housing 203, the cooling air sucked from the bottom surface of the main body housing 203 by the cooling means (cooling unit) 219 surely cools the bottom surfaces of the plurality of heating coil units 205 and the compression coil springs 214. In addition, it flows from the front side to the back side and is discharged from the exhaust port 223 on the bottom surface of the main body housing 203. In FIG. 28, the flow of the cooling air is indicated by arrows.

Also, a temperature sensor 224 that measures the temperature of the object to be heated 202 such as a pan by light is provided at the center of the lower surface of the heating coil unit 205 and is disposed in the path of the cooling air.

In the induction heating apparatus according to the sixth embodiment, as described in the above-described embodiment, the operation display unit 204 and the light emitting display unit 225 can be seen through the top plate 1 from above.

The operation and action of the induction heating apparatus according to the sixth embodiment configured as described above will be described below. FIG. 29 is a block diagram showing control elements in the induction heating apparatus of the sixth embodiment.

As shown in FIG. 29, when the user starts the induction heating apparatus by a cooking start operation on the operation display unit 204, an activation signal is input from the operation display unit 204 to the heating control unit 207.

Next, when the activation signal is input, the heating control unit 207 detects whether or not the object to be heated 202 is placed in each heating coil unit 205 with respect to the object to be heated detection unit 208. Is executed.

In this detection operation, a detection current is passed through the heating coil 211 in each heating coil unit 205, 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 202 is placed on the top plate 201 and disposed at a substantially upper position in the heating coil unit 205, the object to be heated detection unit 208 is based on the detection current of the heating coil unit 205. A detection signal that is a detection result is output to the heating control unit 207.

When the heated object detection unit 208 detects that the heated object 202 is placed on the top plate 201, the heating control unit 207 energizes the corresponding heating coil unit 205 and is provided in the light emitting display unit 226. The LED is turned on, and the light emitting unit (light guide unit) 225 around the heating coil unit 205 is caused to emit light.

At the same time, the heating control unit 207 drives the blower fan 220 to suck in outside air from the air inlet 222 and ejects cooling air from the front of the heating coil units 205 arranged in a lattice shape through the duct 221.

A magnetic field is generated from the heating coil 211 of the energized heating coil unit 205. The magnetic flux generated from the upper side of the heating coil 211 generates an eddy current on the bottom surface of the object to be heated 202, and the object to be heated 202 self-heats (Joule heat), and the temperature rises.

At this time, the temperature sensor 224 always detects the bottom surface temperature of the article 202 to be heated, and a detection signal that is the detection result is input to the heating control unit 207. Then, the heating control unit 207 adjusts the input to the heating coil unit 205 according to the detection signal of the temperature sensor 224 to control the object 202 to be heated to a predetermined temperature.

On the other hand, most of the magnetic flux generated downward from the heating coil 211 is canceled out by the ferrite 209 disposed on the lower side of the heating coil 211, but some leakage of the magnetic flux is inevitable.

Since the compression coil spring 214 pressed from below the heating coil 211 is linear and not in a loop shape, the leakage magnetic flux cannot form an eddy current in the compression coil spring 214, and the compression coil spring 214 does not self-heat.

Further, in the compression coil spring 214, a heat transfer area is secured by being sandwiched between the lower surface of the heating coil unit 205 and the attachment member 216 so that the surface of the wire rod of the first end winding 215 is in surface contact. In particular, the lower surface of the heating coil unit 205 and the flat surface of the mounting member 216 are in surface contact to form a large heat transfer surface, and each is thermally and reliably connected using a heat conducting member. . For this reason, an excellent heat conduction path is constructed between the heating coil unit 205 and the attachment member 216.

As a result, the heat generated by the loss in the heating coil unit 205 is efficiently conducted directly from the lower surface of the heating coil unit 205 to the first end winding 215 of the compression coil spring 214, and in addition, the heating coil unit 205 The first end winding 215 conducts heat from the lower surface of the first through the plane of the mounting member 216. For this reason, in the configuration of the sixth embodiment, the compression coil spring 214 functioning as the urging means functions sufficiently as a heat radiating fin.

Further, in the configuration of the sixth embodiment, the cooling air that the blower fan 220 sucks outside air from the air inlet 222 flows from the duct 221 toward the heating coil units 205 arranged in a lattice pattern, In this configuration, the air is jetted toward the compression coil spring 214 below the heating coil unit 205. As a result, in the induction heating apparatus according to the sixth embodiment, since the lower surface of the heating coil unit 205 and the compression coil spring 214 are cooled, the temperature rise of the heating coil unit 205 can be reliably suppressed.

Therefore, in the induction heating device of the sixth embodiment, in order to prevent an abnormal temperature rise, the rotational speed of the blower fan 220 is used to control the input of the heating coil unit 205 or to increase the amount of blown air. It is not necessary to take measures such as control for increasing the speed. For this reason, in Embodiment 6, it becomes possible to improve the cooling performance with respect to the heating coil, and an easy-to-use induction heating apparatus can be provided.

Further, in the induction heating apparatus of the sixth embodiment, since the compression coil spring 214 presses the heating coil unit 205 against the top plate 201, no space is generated between the heating coil unit 205 and the object to be heated 202. There is no need to set extra magnetic flux in consideration of space. As a result, the heating coil unit 205 can be configured in a compact manner, and as a result, the induction heating device can be reduced in size and thickness.

Further, as shown in FIG. 28, in the induction heating apparatus of the sixth embodiment, after the cooling air blown out from the duct 221 by the cooling means 219 collides with the light emitting display unit 226 surrounded by the heating coil unit 205. , Flows along the side wall surface of the light emitting display unit 226, and concentrates toward the center of the lower surface of the heating coil unit 205.

That is, the light emitting display unit 226 also functions as a guide member (guide body) for guiding the cooling air from the cooling means 219 in a desired direction. That is, since the light emitting display unit 226 is provided, the lower surface of the heating coil unit 205 and the compression coil spring 214 are reliably cooled, and the cooling air flows unnecessarily in the space surrounded by the plurality of heating coil units 5. To prevent that.

In addition, in the induction heating apparatus of the sixth embodiment, the cooling air that flows intensively toward the center of the lower surface of the heating coil unit 205 collides with a temperature sensor 224 disposed at the center of the heating coil, and the It is configured to disturb the flow. As a result, in the configuration of the induction heating device of the sixth embodiment, the heat transfer efficiency is improved and the cooling efficiency is improved. As a result, the cooling air efficiently cools the lower surface of the heating coil unit 205 and the compression coil spring 214, so that the cooling means 219 can be made compact.

In the configuration of the induction heating device according to the sixth embodiment, the cooling air from the cooling means 219 is supplied to all the heating coil units 205 arranged in the front and rear from the windward side to the leeward side in the main body housing 203. On the other hand, the heating coil unit 205 is configured to repeatedly flow in a concentrated manner toward the center of the lower surface of each heating coil unit 205, and is configured to be discharged from the exhaust port 223.

Although the present invention has been described in each embodiment with a certain degree of detail, the disclosure content of these embodiments should be changed in details of the configuration, and the combination and order of elements in each embodiment should be changed. Changes may be made without departing from the scope and spirit of the claimed invention.

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

A top plate on which an object to be heated is placed;
A number of heating coil units including a heating coil that is provided directly below the top plate and induction-heats an object to be heated placed on the top plate;
A light emitting display unit disposed around each of the heating coil units and emitting light visibly through the top plate;
A heated object detector for detecting that the heated object is placed above each of the heating coil units;
Based on the detection result by the object to be heated detection unit, a heating control unit that controls each operation state of the heating coil unit and each light emission state of the light emitting display unit;
An urging portion that presses the heating coil unit against the back surface side of the top plate,
The light emitting display unit is disposed in a space surrounded by at least the heating coil unit, the light emitting display case is disposed, and the light emitting element serving as a light emitting source provided in the light emitting display case is adjacent to the light emitting display case. A light guide unit that is provided so as to connect between the light emitting display cases, and whose upper surface facing the top plate emits light by light from the light emitting element,
The heating coil units are arranged in a vertical vertical and horizontal row directly under the top plate,
The heating control unit identifies a heating coil unit that is to induction-heat the object to be heated placed on the top plate based on a detection result by the object to be heated detection unit, and the heating control unit of the identified heating coil unit It is configured to display at least a part of the light emitting display units arranged around to display a heating region,
An induction heating device that is arranged so that an outer surface of the light guide unit is in contact with the heating coil unit, and is configured to regulate a vibration direction of the heating coil unit by the biasing portion in a predetermined direction.
2. The light emitting display unit according to claim 1, 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 said heating control part is comprised so that the said light emission display unit may light-emit and display a heating area | region at the position of the vertex of a square frame at least, when a to-be-heated material is mounted in the said top plate. Induction heating device.
Each of the light emitting display units is provided on an upper surface of the light emitting display case that faces the top plate, and light emitted from the light emitting element is reflected in a spot shape after being reflected on a wall surface in the light emitting display case. The induction heating apparatus according to claim 3, further comprising a membrane sheet having a region.
The induction heating device according to claim 1, wherein the light emitting display unit is configured to emit light linearly around the heating coil unit.
6. The induction according to claim 5, wherein the heating control unit is configured such that, when an object to be heated is placed on the top plate, the light emitting display unit emits and displays a heating region at least at a rectangular frame position. Heating device.
The heating control unit is configured to control a light emission state of the light emitting display unit indicating the heating region according to a temperature of an object to be heated placed on the top plate. The induction heating apparatus according to claim 1.
A sliding guide portion is provided around the heating coil unit and has a sliding guide surface in contact with the heating coil unit and regulates the vibration direction of the heating coil unit by the biasing portion in a predetermined direction. The induction heating apparatus according to claim 1.
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 8, wherein the induction heating device is formed to be regulated.
The induction heating device according to claim 9, wherein the sliding guide portion is formed in each of the light emitting display units.
11. The light emitting display unit according to claim 10, 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.
Each of the light emitting display units is provided on an upper surface of the light emitting display case that faces the top plate, and light emitted from the light emitting element is reflected in a spot shape after being reflected on a wall surface in the light emitting display case. A membrane sheet having a region;
The induction heating device according to claim 11, wherein the sliding guide portion is configured such that a surface in contact with the heating coil unit in the light emitting display case serves 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 12, wherein the sliding guide portion extends in the same direction as a pressing direction against the plate.
11. The light emitting display unit according to claim 10, wherein the light emitting display unit is configured to emit light linearly around the heating coil unit, and the region surrounded by the linear light emission of the light emitting display unit is a heating region. Induction heating device.
The induction heating apparatus according to claim 14, wherein the sliding guide portion is configured such that a surface of the light guide unit that contacts the heating coil unit is 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 device according to claim 15, wherein a sliding guide surface extends in the same direction as a pressing direction of the urging portion against the top plate.
An operation display unit disposed below the top plate;
A proximity sensor for detecting the proximity of an object to the operation display unit;
Further comprising
The induction heating device according to claim 1, wherein when the proximity sensor detects the proximity of an object to the operation display unit, the heating amount of the heating coil is controlled.
The induction heating device according to claim 17, wherein the operation display unit is configured to also serve as the proximity sensor.
The induction heating device according to claim 17, wherein the proximity sensor is integrated with the operation display unit.
The induction heating device according to claim 17, wherein the proximity sensor is provided in a region between the operation display unit and the adjacent heating coil.
The induction heating device according to claim 17, wherein when the proximity sensor detects the proximity of an object to the operation display unit, the operation display unit displays the proximity of the object.
The induction heating device according to claim 17, wherein the proximity sensor is configured by a touch panel arranged in the vicinity of the lower surface of the top plate.
The induction heating device according to claim 17, wherein the proximity sensor is an electrostatic electrode provided on a lower surface of the top plate.
The induction heating device according to claim 17, wherein the proximity sensor is configured by an electrostatic electrode printed on a lower surface of the top plate.
The induction heating device according to claim 17, wherein the proximity sensor is an infrared sensor that detects proximity of a heated object.
The induction heating device according to claim 17, wherein the proximity sensor is a temperature sensor.
27. The induction heating device according to claim 26, wherein the temperature sensor is configured to control a heating amount of the heating coil when the temperature sensor detects a temperature exceeding a threshold temperature acceptable by the operation display unit.
The induction heating device according to claim 17, wherein the proximity sensor is a piezoelectric element that detects pressurization by an object placed on the top plate.
The heating coil of the adjacent heating coil is configured to be controlled when the proximity sensor detects the proximity of an object when heating is performed by the heating coil adjacent to the operation display unit. Induction heating device.
A cooling means for cooling the operation display unit;
The induction heating device according to claim 17, wherein when the proximity sensor detects proximity of an object, the cooling capacity of the cooling unit is increased.
31. The induction heating according to claim 30, wherein when heating is performed by a heating coil adjacent to the operation display unit, the cooling sensor is configured to increase the cooling capacity of the cooling unit when the proximity sensor detects the proximity of an object. apparatus.
31. The proximity sensor is a temperature sensor, and is configured to increase the cooling capacity of the cooling means when the temperature sensor detects a temperature exceeding an allowable threshold temperature of the operation display unit. The induction heating device described in 1.
The induction heating device according to claim 17, wherein the operation display unit is configured by overlapping an operation unit on a liquid crystal display unit.
34. The induction heating device according to claim 33, wherein the operation unit is configured by a touch panel disposed on the liquid crystal display unit.
The induction heating device according to claim 33, wherein the operation unit is an electrostatic electrode provided on a lower surface of the top plate.
The induction heating device according to claim 33, wherein the operation unit is configured by an electrostatic electrode printed on a lower surface of the top plate.
The induction heating device according to claim 17, wherein the proximity sensor is configured to display the proximity of an object on the operation display unit when the proximity sensor continuously detects the proximity of the object to the operation display unit for a predetermined period. .
The induction heating apparatus according to claim 17, wherein the heating coil is configured by a plurality of heating coils.
A base on which the heating coil unit is installed via the biasing unit;
Cooling means for generating cooling air, and
The urging portion has a first end winding sandwiched between the heating coil unit and a non-conductive attachment member, and a second end winding attached to the base, and the heating coil unit The induction heating device according to claim 1, wherein the induction heating device is configured to radiate heat of the heating coil unit by receiving cooling air from the cooling means while pressing the top plate against the top plate.
40. The induction heating apparatus according to claim 39, wherein a heat conduction member is filled between a lower surface of the heating coil unit that sandwiches the first end winding and the attachment member.
41. The induction according to claim 39 or 40, wherein the light emitting display unit is provided so as to narrow the space in a space surrounded by the plurality of heating coils, and the light emitting display unit is configured as a cooling air guide. Heating device.
40. The induction heating apparatus according to claim 39, wherein the attachment member is a planar member and is configured to come into surface contact with a lower surface of the heating coil unit.