JP2011243407A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heating cooker provided with a heating display part which can display a heating condition of heating means so as to be easily seen.SOLUTION: The heating cooker of this invention comprises: a box-shaped body case 101 with an open top; a top plate 102 which covers the open top of the body case and on which an object to be heated can be put; a heating coil 1 which is disposed below the top plate 102; an operation display part 110a which can set up an operation condition of the heating coil 1; and an EL sheet 11 which has electroluminescence as a light source and is disposed so as to be along the periphery of the heating coil 1 to conduct display in accordance with the heating condition of the heating coil 1.

Description

  The present invention relates to a cooking device provided with heating means below a top plate.

  2. Description of the Related Art Conventionally, there is a heating cooker that includes a heating source such as an induction heating coil or a radiant heater below a top plate, and heats an object to be heated placed on the top plate. As such a heating cooker, a device having an annular linear light emitting element including a light source and a light guide around or near an induction heating coil has been proposed (for example, see Patent Document 1).

Japanese Patent Laying-Open No. 2003-197003 (page 7, FIG. 14)

In the heating cooker described in Patent Literature 1, the heating state of the heating source and the placement position of the object to be heated are determined by causing the linear light emitting body including the light source and the light guide disposed below the top plate to emit light. Show to the user.
However, in the case of a linear light emitter composed of a light source and a light guide, there is a difference in light and darkness in the light visually recognized by the user depending on the position and angle viewed by the user. For this reason, there was a possibility of causing misrecognition to the user.

  The present invention has been made to solve the above-described problems, and provides a heating cooker provided with a heating display unit that can easily display the heating state of the heating means.

  A heating cooker according to the present invention is provided in a box-shaped main body case having an upper opening, a top plate that covers the upper opening of the main body case and on which an object to be heated can be placed, and is disposed below the top plate. The heating means, an operation part capable of setting operating conditions of the heating means, and electroluminescence as a light source are arranged along at least a part of the outer peripheral part or inner peripheral part of the heating means, and the heating And a heating display unit that performs display according to the heating state of the means.

  The heating cooker according to the present invention uses electroluminescence as a light source and is arranged so as to be along at least a part of the outer peripheral portion or inner peripheral portion of the heating means, and performs a display according to the heating state of the heating means. With parts. Thus, the visibility of the user can be improved by using electroluminescence which is a self-luminous body as the light source of the heating display unit.

It is a top view of the heating cooker which concerns on Embodiment 1. FIG. It is a top view of the state which removed the top plate of the heating cooker which concerns on Embodiment 1. FIG. It is an AA cross-sectional schematic diagram of FIG. It is a top view of the state which removed the top plate of the heating cooker which concerns on Embodiment 2. FIG. It is a BB cross-sectional schematic diagram of FIG. FIG. 6 is a schematic diagram of a main part showing a heating coil and an EL sheet according to a third embodiment. FIG. 6 is a schematic diagram of a main part showing a heating coil and an EL sheet according to a fourth embodiment. It is a top view of the state which removed the top plate of the heating cooker which concerns on Embodiment 5. FIG. It is CC sectional schematic drawing of FIG. It is a top view of the state which removed the top plate of the heating cooker which concerns on Embodiment 6. FIG. FIG. 11 is a DD cross-sectional schematic diagram of FIG. 10. It is a cross-sectional schematic diagram of the heating cooker according to the seventh embodiment. It is a cross-sectional schematic diagram of the heating cooker according to the eighth embodiment.

  Hereinafter, an embodiment of the present invention will be described by taking an induction heating cooker using an induction heating coil as a heating source as an example.

Embodiment 1 FIG.
[Configuration of cooking device]
(Basic configuration)
First, the basic structure of the heating cooker according to Embodiment 1 will be described.
FIG. 1 is a plan view of a heating cooker 100 according to Embodiment 1, FIG. 2 is a plan view of the heating cooker 100 with a top plate removed, and FIG. 3 is a schematic cross-sectional view taken along line AA of FIG. . In addition, in the following drawings including FIGS. 1 to 3, the proportional relationship between the dimensions and shapes of the constituent members may be different from the actual ones.

  As shown in FIG. 1, the heating cooker 100 includes a rectangular parallelepiped main body case 101 having an upper opening, a top plate 102 covering the upper opening of the main body case 101, and a heating coil 1 provided below the top plate 102. 2 and 3 and operation display units 110 a and 110 b provided on the front side of the main body case 101. The entire top plate 102 is made of a translucent material that transmits infrared rays, such as heat-resistant tempered glass or crystallized glass. The top plate 102 is interposed between the upper opening of the main body case 101 and a rubber packing or sealing material. Fixed in a watertight state.

  On the far side (upper side in FIGS. 1 and 2) of the heating cooker 100, an air inlet 107 is opened on each of the left and right sides of the main body case 101, and an exhaust outlet 108 is opened on the back side center of the main body case 101. is doing. A cover 119 is detachably disposed so as to cover the two intake ports 107 and the exhaust port 108. The cover 119 is made of, for example, a metal plate of punching metal, a metal mesh, or the like, and is provided to prevent a user's finger or a foreign object from entering the air inlet 107 and the air outlet 108.

  As shown in FIG. 2, heating coils 1, 2, and 3 are provided inside the main body case 101 as heating sources for heating an object to be heated placed on the top plate 102. The heating coils 1 to 3 are placed on the coil base and held inside the main body case 101 (see the coil bases 112 and 113 in FIG. 3). In the space inside the heating coil 1, temperature sensors 116 and 117 that can detect the temperature without contact, such as a thermopile, are provided. The temperature sensors 116 and 117 are arranged at positions where the temperature of the lower surface of the top plate 102 can be measured when the top plate 102 is assembled to the main body case 101. Although not shown in FIG. 2, a similar temperature sensor is provided in the vicinity of the heating coils 2 and 3.

  In addition, electroluminescence sheets (hereinafter referred to as EL sheets) 11, 12, and 13 are provided in the vicinity of the heating coils 1, 2, and 3, respectively. The EL sheets 11, 12, and 13 are planar light sources that emit light when a voltage is applied thereto.

The inside of the main body case 101 is partitioned vertically by an upper and lower partition plate 103, and an upper part chamber 109 is formed above the upper and lower partition plates 103, and a cooling chamber 104 is formed below (see FIG. 3). . The upper part chamber 109 is a room in which various parts such as the heating coils 1 to 3 and the EL sheets 11 to 13 are accommodated.
The cooling chamber 104 communicates with the air inlet 107, and a blower 105 (cooling chamber blower) is provided inside the cooling chamber 104. The upper and lower partition plates 103 are formed with air outlets 106 below the heating coils 1 and 2. Therefore, it can be said that the cooling chamber 104 communicates with the upper part chamber 109 through the air outlet 106. Although not shown in FIG. 3, a similar cooling chamber is formed on the left side of the cooking device 100.
In addition, a control circuit 120 that controls the operation of the heating cooker 100 is provided inside the main body case 101.

(Operating means)
The operation display units 110a and 110b (hereinafter may be collectively referred to as the operation display unit 110) include switches for setting the heating power and energization time of the heating coils 1 to 3. In addition, the operation display unit 110 includes a liquid crystal screen capable of displaying setting contents, a timer counter, operation guidance, and the like.

(Heating means)
The heating coils 1 to 3 are induction heating sources that induction-heat an object to be heated placed on the top plate 102, and each constitutes the heating means of the present invention. The heating coils 1 to 3 are configured such that energization is controlled independently of each other by a control circuit 120 disposed inside the main body case 101. In the first embodiment, the heating coil 1 and the heating coil 2 are composed of an inner coil wound in a spiral shape and an outer coil wound concentrically on the outer peripheral side of the coil and spirally wound on substantially the same plane. This is a so-called double coil structure. The inner coil and the outer coil can be energized independently by the control circuit 120, and are heated in three energization patterns: energizing only the inner coil, energizing only the outer coil, and energizing both the outer coil and the inner coil. Things can be heated.
As shown in FIG. 3, the heating coils 2 and 3 are held by coil bases 112 and 113, respectively. Although not shown in FIG. 3, the heating coil 1 is similarly held on the coil base.

  The control circuit 120 increases or decreases the amount of current to the heating coils 1 to 3 based on the setting by the operation display unit 110 and the detection values of the temperature sensors 116 and 117, thereby realizing an optimal heating sequence.

(Heating display)
Next, the heating display unit according to the present embodiment will be described with reference to FIG.
In the first embodiment, the EL sheets 11 to 13 each correspond to the heating display unit of the present invention. The EL sheets 11 to 13 are controlled by the voltage applied by the control circuit 120 and display according to the heating state of the heating coils 1 to 3. In the present invention, the “heating state” is a concept including whether or not the heating operation is performed and the state of the heating output when the heating operation is performed.
Hereinafter, a configuration example of the heating coil and the corresponding EL sheet will be described with reference to FIG.

(1) EL sheet 11
The EL sheet 11 is formed in an annular shape and is disposed along the outer periphery of the heating coil 1 that is a double coil. That is, it can be said that the EL sheet 11 is provided so as to surround a region that can be heated by the heating coil 1.

(2) EL sheet 12
The EL sheet 12 includes three EL sheets 12a, 12b, and 12c. The EL sheet 12a is formed in an annular shape and is arranged along the outer periphery of the heating coil 2 that is a double coil. The EL sheet 12b is also formed in an annular shape, and is disposed in a gap in plan view between the inner coil and the outer coil of the heating coil 2 that is a double coil. The EL sheet 12 c is provided at the center of the inner coil of the heating coil 2. The EL sheet 12a and the EL sheet 12b form a double ring shape.
In addition, when multiple coils more than a triple coil are used as a heating coil, for example, an EL sheet can be provided in the gap between each coil.

(3) EL sheet 13
The EL sheet 13 is formed in an annular shape and is provided along the inner side of the inner periphery of the heating coil 3.

  When a voltage is applied to the EL sheets 11 to 13 configured in this way, light is emitted from the EL sheets 11 to 13 and the emitted light is heated through the top plate 102 made of a translucent material. Proceed to outside of cooker 100. Therefore, the user can see the light emitted from the EL sheets 11 to 13 through the top plate 102.

  In addition, the combination of the heating coils 1-3 shown here and the EL sheets 11-13 is an example. In the first embodiment, examples of different EL sheets 11 to 13 corresponding to the three heating coils 1 to 3 are shown. However, in an actual cooking device, each heating coil has an EL having the same configuration. A sheet may be provided.

[Operation of cooking device]
Next, an operation example of the heating cooker according to the first embodiment and display examples of the EL sheets 11 to 13 in each operation scene will be described.
(1) Operation at power-on When the user turns on the power of the cooking device 100, commercial power is supplied to the control circuit 120 and operation starts. Then, the control circuit 120 applies voltage to the EL sheets 11 to 13 to cause the EL sheets 11 to 13 to emit light. By doing in this way, since the user can see the light which EL sheet 11-13 emits via the top plate 102, he can grasp | ascertain the position which should place the pan which is a to-be-heated material.
For example, by causing the EL sheet 11 arranged along the outer periphery of the heating coil 1 to emit light, the user can be notified of the range in which the object to be heated can be placed. In addition, the EL sheet 12c disposed at the center of the heating coil 2 and the EL sheet 13 disposed along the inner periphery of the heating coil 3 emit light so that the center position when the object to be heated is placed, The minimum possible pot size (diameter) can be informed to the user.

  After displaying the position where the object to be heated as described above is placed for a predetermined time, the light emission of the EL sheets 11 to 13 is stopped. In addition, while the EL sheets 11 to 13 are caused to emit light to display the placement position of the object to be heated, the object to be heated should be placed at the light emission position by the liquid crystal screen of the operation display unit 110 or the like. It is good also as displaying the message which informs.

(2) Pot type determination operation As a pot that can be placed on each heating port as an object to be heated, a magnetic pot that can be heated by the heating cooker 100 and a high-resistance nonmagnetic pot (hereinafter simply referred to as a nonmagnetic pot). ), And a pan made of aluminum or copper that cannot be heated by the cooking device 100 because of its low resistivity. Moreover, heating may be instruct | indicated by the operation display part 110 in a no-load state without mounting a pan. When induction heating is performed in the same way as a magnetic pan or non-magnetic pan with an unloaded state or a pan made of aluminum, copper, etc., excessive current flows to the heating coil, etc. May cause damage. For this reason, even if the user operates the operation display unit 110, the induction heating operation is not immediately started, and the type of pan placed on each heating port is determined.

  First, when the operation display unit 110 instructs to start heating, the control circuit 120 supplies high-frequency power of a specific frequency to any one of the heating coils 1 to 3 instructed to heat, and current detection means (not shown). ) To detect the current flowing through the heating coil. Since the input power and the heating coil current are different depending on whether the object to be heated placed on the top plate 102 is a magnetic pan, a non-magnetic pan, an aluminum / copper pan, or no load, the control circuit 120 Based on these values, it is possible to determine the type of pan to be heated.

When a magnetic pan or a non-magnetic pan is detected, power is supplied to the heating coils 1 to 3 so that the heating power set by the operation display unit 110 is obtained.
When no load is detected or when an aluminum / copper pan is detected, the EL sheets 11 to 13 corresponding to the heating coils 1 to 13 are turned on or blinked to notify the user that the object to be heated should be confirmed. To do. For example, in the case of the EL sheets 12a to 12c arranged concentrically, the user's attention can be further attracted by sequentially blinking these EL sheets. In addition to the light emission of the EL sheets 11 to 13, a message notifying that an unloaded or inappropriate pan is placed may be displayed on the liquid crystal screen or the like of the operation display unit 110. In addition, when no load is detected or an aluminum / copper pan is detected, power is not supplied to the heating coils 1 to 3.

(3) Determining operation of the placement position of the object to be heated Next, the operation of determining whether the pan that is the object to be heated is placed at an appropriate position will be described. When the pan is placed at a position shifted with respect to the heating coils 1 to 3, there is a possibility that the heating efficiency is lowered or the pan handle is heated more than necessary to increase the temperature. For this reason, it is determined whether or not the object to be heated is placed at an appropriate position with respect to the heating coils 1 to 3. Although the details of this determination operation are not specified, for example, the pan is appropriate based on the amount of light received by irradiating light from the lower side of the top plate 102 and reflected by the placed pan. It can be determined whether it is placed at a proper position.

  When it is determined that the pan is not placed at an appropriate position, the EL sheets 11 to 13 are turned on or blinked to notify the user that the pan should be placed at an appropriate position. In addition to the light emission of the EL sheets 11 to 13, a message notifying that the pan should be placed at an appropriate position may be displayed on the liquid crystal screen or the like of the operation display unit 110.

(4) Heating operation Next, the heating operation performed according to the setting in the operation display unit 110 will be described. Here, it is assumed that the heating power and the heating time are set by the operation display unit 110, and the heatable pan is placed at an appropriate position.
When the control circuit 120 applies a voltage corresponding to the set thermal power, a high-frequency current flows through the heating coils 1 to 3 to be heated. The object to be heated placed on the top plate 102 is heated by the high-frequency magnetic flux generated thereby.

When the output from the temperature sensors 116 and 117 capable of measuring the temperature of the lower surface of the top plate 102 detects that the temperature of the top plate 102 has become a predetermined value or more, the control circuit 120 emits the EL sheets 11 to 13. Let This notifies the user that the top plate 102 is hot and alerts the user. For example, blinking the EL sheets 11 to 13 can attract the user's consciousness and call attention.
Further, if the EL sheets 11 to 13 are caused to emit light at a blinking speed corresponding to the temperature of the top plate 102, for example, the blinking speed is increased as the temperature of the top plate 102 rises, the temperature state of the top plate 102 is indicated to the user. It can also be recognized intuitively. Further, when the voltage applied to the EL sheets 11 to 13 is changed according to the temperature of the top plate 102, the luminance of the EL sheets 11 to 13 also changes, so that the user can intuitively recognize the temperature state of the top plate 102. be able to.
Moreover, you may make it light-emit in the form of a number or a character by sticking a masking tape beforehand on the surface of EL sheet 11-13.
In addition to the light emission of the EL sheets 11 to 13, a message notifying that the temperature of the top plate 102 has reached a predetermined value or more may be displayed on the liquid crystal screen or the like of the operation display unit 110.

  Furthermore, if the cooking device 100 can operate in a plurality of heating modes, the EL sheets 11 to 13 may be caused to emit light according to the set heating mode when heating is started. By doing in this way, the user can recognize easily in which heating mode it is heated.

  When the set heating time has elapsed, the control circuit 120 stops the power supply to the heating coils 1 to 3 and ends the heating. At this time, the EL sheets 11 to 13 can emit light to inform the user that the heating has been completed. The EL sheets 11 to 13 may be turned on for a predetermined time or may be blinked at a predetermined speed. Moreover, it is good also as displaying the message which notifies that heating was complete | finished with the liquid crystal screen etc. of the operation display part 110 with the light emission of EL sheets 11-13.

[Cooling structure]
Next, the cooling structure of the heating coils 1 to 3 of the heating cooker 100 will be described with reference to FIGS. The high temperature magnetic flux generated by the heating coils 1 to 3 raises the temperature of the pan, which is the object to be heated, but the vicinity of the heating coils 1 to 3 also becomes high due to the reflected heat from the bottom of the pan and the radiant heat from the top plate 102. . Here, a structure for cooling the vicinity of the heating coils 1 to 3 to be heated will be described.

  When the operation display unit 110 is operated to start energization of the heating coil 2 and the like, the control circuit 120 drives the blower 105. When the blower 105 is driven, air outside the main body case 101 is sucked into the cooling chamber 104 from the air inlet 107 (arrow Y1). The sucked air is sent by the blower 105 through the cooling chamber 104 toward the front side of the heating cooker 100 (arrow Y2), and passes through the plurality of air outlets 106 provided in the upper and lower partition plates 103 to be the upper part chamber. 109 (arrow Y3). Then, the air that has flowed into the upper part chamber 109 passes through the vicinity of the EL sheet 12 installed in the vicinity of the heating coil 2, and cools the EL sheet 12 (arrow Y4). Further, this air collides with the heating coil 2 or passes through the gap between the heating coils 2 to cool the heating coil 2 (arrow Y5). The air that has cooled the heating coil 2 flows in the upper component chamber 109 in the direction of the heating coil 3, and cools the heating coil 3 and the EL sheet 13 installed on the back side of the main body case 101 (arrow Y6). . And the air which cooled the heating coil 3 and the EL sheet | seat 13 is exhausted to the exterior of the heating cooker 100 from the exhaust port 108 opened in the back | inner side of the heating cooker 100 (arrow Y7). In this manner, the heating coils 1 to 3 and the EL sheets 11 to 13 provided in the vicinity thereof can be air-cooled.

As described above, according to the first embodiment, the EL sheet 11 using electroluminescence as the light source is provided along the outer periphery of the heating coil 1. Moreover, the EL sheet 12a was provided on the outer periphery of the heating coil 2 which is a double coil, the EL sheet 12b was provided in the gap between the inner coil and the outer coil, and the EL sheet 12c was provided in the center of the inner coil. Further, an EL sheet 13 was provided along the inner periphery of the heating coil 3. And these EL sheets 11-13 were used for the display of the mounting position of a to-be-heated object, the display of the determination result of a pan kind, the display of the temperature of the top plate 102, or the display which notifies completion | finish of a heating. Since electroluminescence is used as a light source, even when the viewing position or angle changes, it is possible to reduce the occurrence of light and dark differences in the light viewed by the user.
Moreover, since the display according to the heating state of the heating coils 1-3 is performed using the EL sheets 11-13 in the position where the area on the top plate 102 is wide and easy to see, the visibility of the user can be improved.
In addition, since an EL sheet that can be easily processed such as cutting is used, various shapes can be displayed depending on the shape and installation position of the heating coil. In addition, the EL sheet has less environmental load at the time of disposal and less power consumption at the time of lighting as compared with a case where a light bulb is used as a light source.

  Further, a blower 105 is provided inside, and a cooling chamber 104 is provided which sucks air outside the heating cooker 100 from the air inlet 107 and blows out from the air outlet 106 opened below the EL sheet 12. For this reason, the EL sheet 12 can be cooled by the air blown out from the air outlet 106, and the EL sheet 12 can be prevented from being destroyed by the heat in the vicinity of the heating coil 2 that is heated to a high temperature.

Embodiment 2. FIG.
In Embodiment 2, an example of a structure of an EL sheet will be described.
4 is a plan view of the heating cooker according to Embodiment 2 with the top plate removed, and FIG. 5 is a schematic cross-sectional view taken along the line BB of FIG. In each figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and in the second embodiment, differences from the first embodiment will be mainly described.

  As described in the first embodiment, the air sucked from the air inlet 107 flows into the upper part chamber 109 from the air outlet 106 as cooling air and cools the EL sheet 22 and the heating coil 2 from the air outlet 108. Go out of the cooker. Since the vicinity of the heating coil 2 is heated, the air that has cooled the heating coil 2 may also be heated. Therefore, in Embodiment 2, the EL sheets 21 to 23 are arranged on the upstream side of the heating coil 2 on the cooling air flow path for cooling the heating coil 2, and the EL sheet is arranged on the downstream side of the heating coil 2 as much as possible. It is not arranged.

As shown in FIG. 4, the EL sheets 21, 22a, 22b, and 23 according to the second embodiment have an arc shape. The EL sheet 21 has a shape obtained by cutting off a portion of the EL sheet 11 described in Embodiment 1 that overlaps the flow path of the cooling air (arrow Y5) from the heating coil 1 to the exhaust port 108. The EL sheets 22a and 22b also have the shape of the EL sheet 12 described in the first embodiment cut out from the portion overlapping the flow path of the cooling air (arrow Y5) from the heating coil 2 to the exhaust port 108. .
Further, the EL sheet 23 is disposed only on the upstream side of the heating coil 3 of the cooling air flowing from the heating coils 1 and 2.

  Thus, according to the second embodiment, the EL sheets 21 and 22 are not arranged on the downstream side of the heating coils 1 and 2 on the flow path of the cooling air that cools the heating coil. Further, the EL sheet 23 is not disposed downstream of the cooling coil from the heating coil 3. By doing in this way, it can suppress that EL sheet 21-23 is destroyed by the heat of the air which cooled the heating coil and heated up.

Embodiment 3 FIG.
FIG. 6 is a schematic diagram of a main part showing the heating coil 1 and the EL sheet 31 according to the third embodiment. In this Embodiment 3, the example which comprises the EL sheet corresponding to the heating coil 1 by a some EL sheet is shown.

The EL sheet 31 includes four EL sheets 31a, 31b, 31c, and 31d that are disposed outside the outer periphery of the heating coil 1. The EL sheets 31a to 31d are each formed in a substantially ¼ arc shape, and are arranged so as to surround the outer periphery of the heating coil 1 as a whole. In other words, each of the EL sheets 31a to 31d has a shape that is obtained by substantially dividing the annular EL sheet into four parts.
The EL sheets 31a to 31d are provided with electrodes 34a, 34b, 34c, and 34d for applying a voltage, respectively, and can be individually controlled by the control circuit 120. Therefore, for example, all of the EL sheets 31a to 31d can be lit or blinked, or some of the EL sheets 31a to 31d can be lit or blinked.

In such a configuration, for example, when displaying the placement position of the object to be heated, the EL sheets 31a to 31d are lit for a predetermined time. In this way, the user can be notified of the range in which the object to be heated can be placed.
Moreover, when no load is detected or the aluminum / copper pan is detected in the determination of the pan type, the user should confirm that the object to be heated should be confirmed by lighting or blinking part or all of the EL sheets 31a to 31d. Inform.
Moreover, when it determines with the pan not being mounted in the appropriate position in determination of the mounting position of a pan, for example, either the EL sheet 31a-31d of the direction which should mount a pan is lighted or Blink. By doing so, it is possible to notify the user of the proper placement position of the pan and to prompt the user to reposition the pan at the proper position.
Further, when the temperature of the top plate 102 becomes equal to or higher than a predetermined value during heating by the heating coil 1, the user is alerted by turning on or blinking some or all of the EL sheets 31a to 31d. Further, the number of EL sheets 31a to 31d to be lit may be changed according to the temperature of the top plate 102.

  As described above, according to the third embodiment, a plurality of EL sheets 31 a to 31 d that can be energized independently are provided for one heating coil 1. By combining these EL sheets 31a to 31d and turning on or blinking, for example, information such as the placement position of the object to be heated and the temperature of the top plate 102 can be transmitted to the user in an easy-to-understand manner.

Embodiment 4 FIG.
FIG. 7 is a main part schematic diagram showing the heating coil 1 and the EL sheet 41 according to the fourth embodiment. In the fourth embodiment, EL sheets 41 a-1, 41 a-2 and 41 a-3 that can emit light in different colors (sometimes collectively referred to as EL sheet 41 a) are placed outside the outer periphery of the heating coil 1. It is arranged. The EL sheets 41 a-1, 41 a-2, and 41 a-3 are provided with electrodes 44 a-1, 44 a-2, and 44 a-3 for applying a voltage, respectively, and the lighting control is individually performed by the control circuit 120. Is possible. Then, EL sheets 41b, 41c, 41d having the same configuration as the EL sheet 41a are arranged so as to surround the outer periphery of the heating coil 1.

  In such a configuration, by turning on or blinking some or all of the EL sheets 41a to 41d, the user can easily understand information such as the pan placement position and the temperature of the top plate 102 as described above. I can tell you.

Embodiment 5 FIG.
In the fifth embodiment, an example will be described in which an EL sheet installed in the vicinity of a heating coil heated to a high temperature by energization is cooled more efficiently.
FIG. 8 is a plan view of the heating cooker according to Embodiment 5 with the top plate removed, and FIG. 9 is a schematic cross-sectional view taken along the line CC of FIG. In each figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and in the fifth embodiment, differences from the first embodiment will be mainly described.

  In the fifth embodiment, wind guide walls 55a and 55b (hereinafter may be collectively referred to as a wind guide wall 55) are provided. The air guide wall 55 is a wall for guiding the air flowing into the upper part chamber 109 from the air outlet 106 in the direction of the heating coil 3. The air guide wall 55b stands on the upper and lower partition plates 103 so as to surround the front side of the heating coil 2 while partitioning between the heating coil 1 and the heating coil 2.

  In such a configuration, the air that flows into the upper part chamber 109 through the air outlet 106 cools the EL sheet 12 installed in the vicinity of the heating coil 2 and cools the heating coil 2. At this time, the air flowing into the upper component chamber 109 is guided toward the heating coil 3 by the air guide wall 55b. Since the air guide wall 55 b stands up so as to partition the heating coil 1, the air blown below the heating coil 2 is efficiently guided to the heating coil 3.

  As described above, according to the fifth embodiment, the air guide wall 55b that guides the air blown from the outlet 106 of the cooling chamber 104 to the lower side of the heating coil 2 in the direction of the heating coil 3 is provided. For this reason, the air blown out from the blower outlet 106 can be guided to the heating coil 3 and the EL sheet 13 provided in the vicinity thereof, and the heating coil 3 and the EL sheet 13 can be efficiently cooled.

Embodiment 6 FIG.
In the sixth embodiment, an example of an EL sheet cooling structure installed in the vicinity of the heating coil will be described.
10 is a plan view of the heating cooker according to Embodiment 6 with the top plate removed, and FIG. 11 is a cross-sectional schematic view taken along the line DD in FIG. In each figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and the sixth embodiment will be described focusing on the differences from the first embodiment.

  In the sixth embodiment, the EL sheet 62a is provided along the outer periphery of the outer coil of the heating coil 2 that is a double coil, and the EL sheet 62b is provided between the outer coil and the inner coil in plan view. Yes. The EL sheets 62a and 62b (hereinafter may be collectively referred to as the EL sheet 62) have arc shapes in which the front side of the main body case 101 is opened, and are accommodated in the cylindrical accommodating portions 66a and 66b, respectively. ing.

The storage portions 66a and 66b (hereinafter may be collectively referred to as the storage portion 66) have substantially the same planar shape as the EL sheets 62a and 62b, respectively, and are formed in a cylindrical shape. The storage unit 66 is made of, for example, thermosetting plastic or heat resistant glass. At least the upper surface of the storage section 66 is configured to be transparent or translucent so that light emitted from the EL sheet 62 stored therein can be transmitted. The storage portion 66 is fitted into the coil bases 112 and 113 by being fitted into grooves (not shown) provided in the coil bases 112 and 113 from above.
The upper surface of the EL sheet 62 accommodated in the accommodating portion 66 is installed so as to be positioned on substantially the same plane as the upper surface of the heating coil 2.

  Fans 67a and 67b (hereinafter may be collectively referred to as fans 67) are provided in the storage portions 66a and 66b, respectively. The fan 67 is driven and controlled by the control circuit 120 and blows air into the storage portion 66, and corresponds to a blowing means of the present invention.

In such a configuration, when energization of the heating coil 2 is started, the control circuit 120 also drives the fan 67. Then, the fan 67 is driven to blow air into the storage portion 66, and the EL sheet 62 is cooled. For this reason, it is possible to suppress the EL sheet 62 from being destroyed by the heat in the vicinity of the heating coil 2 that is heated by energization.
Although the EL sheet 62 provided corresponding to the heating coil 2 has been described as an example in the sixth embodiment, the same configuration can be applied to the EL sheet provided corresponding to the heating coils 1 and 3.

Embodiment 7 FIG.
In the seventh embodiment, another example of the EL sheet cooling structure installed in the vicinity of the heating coil will be described. The seventh embodiment will be described with a focus on differences from the sixth embodiment.
FIG. 12 is a schematic cross-sectional view of the heating cooker according to the seventh embodiment, showing a cross section taken along the line DD in FIG.

In the seventh embodiment, an EL sheet 62 similar to that in the sixth embodiment is housed in the housing portion 66, and air is blown into the housing portion 66 by a fan 67 (not shown in FIG. 12, see FIG. 10). Is done.
Furthermore, in the storage portions 66a and 66b, heat radiating fins 78a and 78b (hereinafter may be collectively referred to as the heat radiating fins 78) are provided as heat radiating means for cooling the EL sheets 62a and 62b, respectively. . The EL sheet 62 is installed on the heat radiating fins 78.
The storage portion 66 is attached to the lower side of the coil bases 112 and 113 that hold the heating coil 2. That is, the EL sheets 62a and 62b have the same positional relationship with the heating coil 2 in plan view as in the sixth embodiment, but are positioned below the heating coil 2 in side view. This is different from Form 6.

In such a configuration, when energization of the heating coil 2 is started, the control circuit 120 also drives the fan 67. Then, the fan 67 is driven to blow air into the storage portion 66, and the EL sheet 62 is cooled. For this reason, it is possible to suppress the EL sheet 62 from being destroyed by the heat in the vicinity of the heating coil 2 that is heated by energization.
Moreover, since the EL sheet 62 is installed on the heat radiation fins 78, the cooling efficiency of the EL sheet 62 can be further improved.
In addition, the storage section 66 that stores the EL sheet 62 is attached to the lower side of the heating coil 2 that is heated. For this reason, the radiant heat from the vicinity of the heating coil 2 to the EL sheet 62 can be reduced. In addition, since the EL sheet 62 is located on the upstream side of the cooling air blown from the air outlet 106 with respect to the heating coil 2, the cooling air not affected by the heating coil 2 is blown. Thus, since the influence of the heat in the vicinity of the heating coil 2 to be heated can be reduced, it is possible to suppress the EL sheet 62 from being thermally destroyed by the high temperature.

Embodiment 8 FIG.
In the eighth embodiment, a configuration example for improving the visibility of an EL sheet will be described.
FIG. 13 is a schematic cross-sectional view of a heating cooker according to Embodiment 8, and shows a cross section at a position corresponding to the AA cross section of FIG. In FIG. 13, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and in the eighth embodiment, differences from the first embodiment will be mainly described.

In the eighth embodiment, a printing surface 89 is provided on the surface of the top plate 102. The printing surface 89 is provided for the purpose of preventing the object to be heated placed on the top plate 102 from slipping. For example, paint is attached to the printing surface 89 in the form of dots or stripes, and unevenness is formed on the surface of the top plate 102 by this paint.
The printing surface 89 is provided in a region where the object to be heated can be placed on the top plate 102, but a slit 80 is formed as a portion where printing is not performed almost directly above the EL sheets 11 to 13. Yes. The slit 80 almost directly above the EL sheets 11 to 13 functions as a confirmation window that makes the EL sheets 11 to 13 visible.

  In such a configuration, when the EL sheets 11 to 13 emit light, the user can see the light emitted from the EL sheets 11 to 13 through the top plate 102. Since the slit 80 is located directly above the EL sheets 11 to 13 and there is no printing surface 89, the light emitted from the EL sheets 11 to 13 is not blocked by the printing surface 89. For this reason, the visibility of the EL sheets 11 to 13 can be improved while obtaining the anti-slip effect of the top plate 102 by the printing surface 89.

Note that Embodiments 1 to 8 can be combined with each other. Moreover, although the said Embodiment 1-8 demonstrated to the example the heating cooker provided with three heating openings, the number of heating openings is not limited to this. The present invention also relates to a so-called stationary heating cooker installed on kitchen furniture such as a kitchen sink, a so-called built-in heating cooker incorporated in an installation space formed in kitchen furniture, and a home desktop. It can be applied to various cooking devices such as cooking devices and commercial cooking devices, regardless of the installation method and usage.
In the above description, an induction heating cooker using an induction heating coil as a heating source has been described as an example. However, the present invention can also be applied to a heating cooker using an electric heater such as a radiant heater as a heating source.

  1-3 Heating coil, 11-13 EL sheet, 21-23 EL sheet, 31-33 EL sheet, 41a-41d EL sheet, 44a-44d electrode, 55 Air guide wall, 62a, 62b EL sheet, 66a, 66b Part, 67a, 67b fan, 78a, 78b heat radiation fin, 80 slit, 89 printing surface, 100 heating cooker, 101 body case, 102 top plate, 103 top and bottom partition plate, 104 cooling chamber, 105 blower, 106 air outlet, 107 Intake port, 108 Exhaust port, 109 Upper part chamber, 110 Operation display unit, 110a, 110b Operation display unit, 112, 113 Coil base, 116, 117 Temperature sensor, 119 Cover, 120 Control circuit.

Claims (12)

A box-shaped body case with an open top;
Covering the upper opening of the main body case, a top plate on which an object to be heated can be placed;
Heating means disposed below the top plate;
An operation unit capable of setting operating conditions of the heating means;
A heating display unit that uses electroluminescence as a light source and is arranged along at least a part of the outer peripheral part or the inner peripheral part of the heating unit, and performs display according to the heating state of the heating unit; A cooking device characterized by. The cooking device according to claim 1, wherein the heating display unit performs display according to a temperature of the top plate. The cooking device according to claim 1 or 2, wherein the heating display unit blinks in accordance with a heating state of the heating means. The cooking device according to any one of claims 1 to 3, wherein the heating display unit changes a display color according to a heating state of the heating unit. The heating means includes a plurality of heating sources arranged in multiple concentric circles,
The heating cooker according to any one of claims 1 to 4, wherein the heating display unit is arranged between the adjacent heating sources in a plan view. The cooking device according to any one of claims 1 to 5, further comprising a cylindrical storage unit that stores the heating display unit. The cooking device according to claim 6, further comprising a blowing unit in the storage unit. The cooking device according to claim 6 or 7, wherein the storage portion includes a heat radiating means. The heating cooking according to any one of claims 1 to 8, wherein a confirmation window that makes the heating display part visible is provided at least on a portion of the top plate located above the heating display part. vessel. A cooling chamber defined in the main body case;
A cooling chamber blower disposed inside the cooling chamber,
The heating cooker according to any one of claims 1 to 9, wherein the cooling chamber includes an air inlet and an air outlet that opens below the heating unit and blows out cooling air. The heating cooker according to any one of claims 1 to 10, wherein the heating display unit is arranged on the upstream side of the cooling air blown from the blower outlet than the heating means. A plurality of heating means,
The cooking device according to any one of claims 1 to 11, further comprising an air guide wall that guides the cooling air blown from the air outlet to the other heating means.

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