JP6287597B2 - Cooker - Google Patents

Description

  The present invention relates to the technology of a heating cooker, and more particularly to the technology of a heating cooker that heats a heated plate by induction heating.

  Conventionally, a cooking device using induction heating is known, and a technique for induction heating a container formed of a nonconductive material such as a clay pot is known (see, for example, Patent Document 1 and Patent Document 2). .

JP 2008-186756 A JP 2008-295495 A

  When the heating cooker using induction heating is to be configured as a flat plate-like hot plate as described above, the heated container is enclosed with respect to the main body by surrounding the outer peripheral part of the heated container with high temperature. While positioning, exposure to the circumference | surroundings of a to-be-heated container can be reduced. However, when the outer peripheral portion of the heated container is surrounded by the main body, the heated container becomes hot, which may adversely affect the devices around the electromagnetic induction coil.

  In view of the above situation, the present invention is a cooking device that heats a flat dish-shaped heated container using induction heating, even when the outer peripheral portion of the heated container that is heated is surrounded by the main body. Provided is a heating cooker that can improve the heat radiation efficiency from a heating container and reduce the influence on the devices around the electromagnetic induction coil due to the heat from the heated container.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, in claim 1, a plate mounting portion, an electromagnetic induction coil disposed below the plate mounting portion, and a flat cylindrical frame member that supports the plate mounting portion at the bottom portion, A main body provided with a heating layer that is induction-heated by the electromagnetic induction coil, and the heating layer is induction-heated in a state of being positioned on the upper surface of the plate mounting portion inside the frame member. A heating cooker comprising a heating plate, wherein a gap is formed between an inner peripheral surface of the frame member and an outer peripheral surface of the heated plate, whereby heat of the heated plate is transferred to the air in the gap. and waste heat to the layer, the inclination angle of the inner peripheral surface of the frame member from the horizontal plane, is larger than the inclination angle of the outer peripheral surface of the heated plate from a horizontal plane, the object to be heated and the frame inner periphery of the member Between the outer peripheral surface of the plate, Serial in which a gap was formed radiating portion the width of opening is larger than the surrounding upward.

  Thereby, the thermal radiation efficiency from a to-be-heated plate can be improved, and the influence on the apparatus around an electromagnetic induction coil by the heat from a to-be-heated plate can be reduced.

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According to a second aspect of the present invention, the heat radiating portion is formed by expanding at least one portion of the inner peripheral surface of the frame member to the outside.

  As a result, the heat dissipation efficiency is further improved by releasing the heat of the heated plate from the heat radiating part formed on the frame member, and the influence of the heat from the heated plate on the devices around the electromagnetic induction coil is further reduced. Can do.

In Claim 3 , the operation display part is formed in the part in which the said heat radiating part is not formed in the said frame member.

  Thereby, the influence on the operation display part by the heat from a to-be-heated plate can be reduced by separating the heat-radiation part which discharge | releases the heat of a to-be-heated plate, and the operation display part in a frame member.

According to a fourth aspect of the present invention, the heat radiating portion is formed by shrinking at least one portion of the outer peripheral surface of the heated plate toward the inside.

  Thereby, the heat dissipation efficiency is further improved by releasing the heat of the heated plate from the heat radiating portion formed on the heated plate, and the influence of the heat from the heated plate on the devices around the electromagnetic induction coil is further reduced. be able to.

According to a fifth aspect of the present invention, at least two of the heat dissipating portions are formed in portions facing each other across the center of the heated plate.

  Thereby, a thermal radiation part can be used as a handle part of a to-be-heated plate.

According to a sixth aspect of the present invention, the heating plate is formed of a ceramic plate, and the heating layer is formed by sticking a heating element induction-heated by the electromagnetic induction coil to the ceramic plate.

  Thereby, the heat dissipation efficiency from the ceramic plate with low thermal conductivity can be improved, and the influence of the heat from the ceramic plate on the devices around the electromagnetic induction coil can be reduced.

  As effects of the present invention, the following effects can be obtained.

  The heating cooker according to the present invention heats a flat dish-shaped heated container using induction heating, and even when the outer peripheral portion of the heated container that is heated is surrounded by the main body portion, the heated container The heat dissipation efficiency from the heating can be improved, and the influence of the heat from the heated container on the devices around the electromagnetic induction coil can be reduced.

The disassembled perspective view which showed the whole structure of the heating cooker which concerns on 1st embodiment. (A) is the front view which similarly showed the heating cooker, (b) is the sectional view on the AA line in Fig.2 (a). The enlarged view of the gap | interval of a frame member and a ceramic plate. The top view which showed the state which similarly mounted the ceramic plate in the main-body part in a heating cooker. XX sectional drawing in FIG. The top view which showed the state which mounted the ceramic plate in the main-body part in the heating cooker which concerns on 2nd embodiment. The YY sectional view taken on the line in FIG.

First, the whole structure of the heating cooker 10 which is 1st embodiment of the heating cooker which concerns on this invention is demonstrated using FIG.1 and FIG.2.
In addition, in the following description, the direction of the heating cooker 10 is prescribed | regulated using the arrow in each figure.

  As shown in FIGS. 1 and 2, the heating cooker 10 includes a main body 11, a ceramic plate 12 that is a heated plate, and a lid 13.

  The main body 11 is a member that constitutes the main structure of the heating cooker 10, and a frame member made of synthetic resin (for example, polypropylene (PP) or the like) configured by combining the lower frame member 21 and the upper frame member 22. Prepare. Legs 21 a are formed on the lower surface of the lower frame member 21. The lower frame member 21 and the upper frame member 22 are assembled by screwing screws 37, which are fixing members, into the upper frame member 22 through fixing holes 21 b formed in the lower frame member 21.

  The upper frame member 22 is formed in a flat cylindrical shape as shown in FIGS. 1 and 2B. A plate-like glass top plate 23 made of heat-resistant glass is placed on the bottom of the upper frame member 22 as a plate placement portion in order to place the ceramic plate 12 at a high temperature. In other words, the upper frame member 22 supports the glass top plate 23 at the bottom. An electromagnetic induction coil 35 for performing induction heating is disposed below the glass top plate 23.

  On the front surface of the upper frame member 22, a touch switch including an ON / OFF unit 22a and a temperature adjusting unit 22b is disposed as an operation display unit. The user starts or stops the heating of the cooking device 10 by touching the ON / OFF unit 22a (the ON / OFF unit 22a is lit and displayed during heating). Further, the user increases the heating temperature by the heating cooker 10 by touching the “+” portion of the temperature adjustment unit 22b, and the heating by the heating cooker 10 by touching the “−” portion of the temperature adjustment unit 22b. Reduce the temperature. As shown in FIG. 2B, an operation board 31 for controlling the heating cooker 10 based on an input signal from the operation display unit is disposed inside the upper frame member 22 behind the operation display unit. . The operation board 31 is equipped with a microprocessor for controlling the induction heating output of the ceramic plate 12 by the electromagnetic induction coil 35 as heating means. The operation display unit may be separated from the upper frame member 22 or the operation display unit may be provided on the lower frame member 21.

  The ceramic plate 12 is a container made of a flat plate-like ceramic (including earthenware such as an earthen pot) whose surface is subjected to fluorine processing, which is used by being placed on the upper surface of the glass top plate 23 as described above. A flange portion 12 a is formed at the outer peripheral end of the ceramic plate 12. When the ceramic plate 12 is placed on the upper surface of the glass top plate 23, the outer peripheral surface 12b of the ceramic plate 12 abuts on the upper frame member 22 that supports the glass top plate 23 (see range a in FIG. 3). That is, in this state, the ceramic plate 12 is positioned on the upper surface of the glass top plate 23. Thereby, a predetermined space is formed between the flange portion 12 a of the ceramic plate 12 and the inner peripheral surface 22 d of the upper frame member 22.

  A silver film (not shown) is attached to the lower surface of the ceramic plate 12 as a heating element. This silver film functions as a heat generating layer that is induction-heated by the electromagnetic induction coil 35. That is, in the ceramic plate 12, the silver film is induction-heated as a heat generating layer while being positioned on the upper surface of the glass top plate 23 inside the upper frame member 22. In the present embodiment, the ceramic plate 12 is used as the heated plate, but the heated plate may be configured using other materials that can use induction heating, such as iron.

  The lid 13 is made of ceramic and closes the upper surface of the ceramic plate 12. The heating cooker 10 can be used without using the lid 13 (with the lid 13 removed from the ceramic plate 12).

  The electromagnetic induction coil 35 is a heating unit that is accommodated in the lower frame member 21 below the glass top plate 23 and heats the ceramic plate 12, and is formed in an annular shape. An eddy current is generated in the ceramic plate 12 by applying a voltage to the electromagnetic induction coil 35 and changing the magnetic field. When an eddy current is generated in the ceramic plate 12 by the electromagnetic induction coil 35, the heating element in the ceramic plate 12 is configured to generate heat (heat) by the eddy current generated by the electromagnetic induction coil 35 and the electric resistance of the heating element. Below the electromagnetic induction coil 35, a magnetic body (not shown) is disposed in order to strengthen a magnetic field that generates eddy currents.

As shown in FIG. 2B, frames 32 and 32 are disposed inside the lower frame member 21.
Holder supports 33 and 33 for supporting the coil holder 34 are disposed on the frames 32 and 32. The coil holder 34 is fixed to the lower frame member 21 by screwing screws 38 as fixing members through fixing holes 21 c formed in the lower frame member 21. The electromagnetic induction coil 35 is accommodated in the lower frame member 21 by being disposed in the coil holder 34. Although other members such as a heat radiating fan are disposed on the frames 32 and 32, a specific description thereof is omitted in the present embodiment.

  A temperature sensor 36 that detects the temperature of the glass top plate 23 is in contact with the lower surface of the glass top plate 23. Based on the temperature of the glass top plate 23 detected by the temperature sensor 36, the temperature control of the ceramic plate 12 that takes time to increase in temperature is possible because of its high heat storage property. A portion of the lower surface of the glass top plate 23 where the temperature sensor 36 does not contact is subjected to a thermal insulation process using mica (mica). The coil holder 34 is provided with a one-shot type thermostat (not shown). When the ceramic plate 12 is heated to a predetermined temperature or higher by heating by the electromagnetic induction coil 35, a voltage is applied to the electromagnetic induction coil 35. Is configured to stop.

  In the heating cooker 10 according to the present embodiment, a gap G is formed between the inner peripheral surface 22d of the upper frame member 22 and the outer peripheral surface 12b of the ceramic plate 12, as shown in FIGS. And it is set as the structure which exhausts the heat | fever of the ceramic plate 12 which became high temperature by the induction heating of the electromagnetic induction coil 35 to the air layer in the gap | interval G.

  In the present embodiment, as described above, the ceramic plate 12 is positioned with respect to the main body portion 11 by surrounding the outer peripheral portion of the ceramic plate 12 that becomes high temperature with the upper frame member 22, and the ceramic plate 12 is exposed to the periphery of the ceramic plate 12. Is reduced. Further, the heat dissipation efficiency from the ceramic plate 12 is improved by exhausting the heat of the ceramic plate 12 to the air layer in the gap G. Thereby, the influence on the surrounding equipment of the electromagnetic induction coil 35 by the heat from the ceramic plate 12 can be reduced. In particular, in the heating cooker 10 according to the present embodiment, the ceramic plate 12 having a low thermal conductivity and a high thermal storage property is used as the heated plate, so that the heat dissipation efficiency is improved and the influence on peripheral devices is affected. From the viewpoint of reduction, a configuration in which the gap G is formed between the inner peripheral surface 22d of the upper frame member 22 and the outer peripheral surface 12b of the ceramic plate 12 is more preferable.

  Further, in the heating cooker 10 according to the present embodiment, as shown in FIG. 3, the inclination angle α of the inner peripheral surface 22 d of the upper frame member 22 from the horizontal plane H is set to the outer peripheral surface 12 b of the ceramic plate 12 from the horizontal plane H. Is formed larger than the inclination angle β. Accordingly, the volume of the gap G between the inner peripheral surface 22d of the upper frame member 22 and the outer peripheral surface 12b of the ceramic plate 12 can be increased without increasing the opening area on the upper side of the gap G. That is, the heat dissipation efficiency from the ceramic plate 12 can be further improved, and the influence of the heat from the ceramic plate 12 on the peripheral devices of the electromagnetic induction coil 35 can be further reduced.

  Further, in the heating cooker 10 according to the present embodiment, as shown in FIGS. 4 and 5, the gap G is upward between the inner peripheral surface 22 d of the upper frame member 22 and the outer peripheral surface 12 b of the ceramic plate 12. The heat radiating portions G1 and G1 having a width that opens toward the outside are formed larger than the surroundings. Specifically, the heat radiating portions G1 and G1 are formed by forming the enlarged diameter portions 22c and 22c in which two left and right portions of the inner peripheral surface 22d of the upper frame member 22 are widened outward. In addition, although it is set as the structure which forms the thermal radiation part G1 * G1 in two diameter expansion parts 22c * 22c in this embodiment, the diameter expansion part 22c can also be formed in one place or three places or more.

  In the present embodiment, the heat radiation efficiency is further improved by releasing the heat of the ceramic plate 12 from the heat radiation portions G1 and G1 (the enlarged diameter portions 22c and 22c) formed on the upper frame member 22 by configuring as described above. Thus, the influence of the heat from the ceramic plate 12 on the peripheral devices of the electromagnetic induction coil 35 can be further reduced.

  Moreover, in the heating cooker 10 which concerns on this embodiment, the operation display part (ON / OFF part 22a) is formed in the front part which does not form the thermal radiation part G1 * G1 (expanded diameter part 22c * 22c) in the upper frame member 22. And a temperature control part 22b). In other words, by forming the enlarged diameter portions 22c and 22c at the left and right ends of the upper frame member 22, the heat radiating portions G1 and G1 are configured to be far from the operation display portion.

  In the present embodiment, since the heat dissipating parts G1 and G1 that release the heat of the ceramic plate 12 and the operation display part can be separated from each other in the upper frame member 22 by configuring as described above, the heat from the ceramic plate 12 can be separated. Can reduce the influence on the operation display unit.

  Moreover, in the heating cooker 10 which concerns on this embodiment, the heat radiation part G1 * G1 of two places is formed in the part of the both right and left sides which oppose on both sides of the center of the ceramic plate 12. As shown in FIG. The user can use the heat radiating portions G1 and G1 as the handle portion of the ceramic plate 12. Note that the heat dissipating parts G1 and G1 only need to be formed in portions facing each other across the center of the ceramic plate 12, and the positions thereof are not limited to the left and right.

  Next, 2nd embodiment of the heating cooker which concerns on this invention is described using FIG.6 and FIG.7. In addition, since the heating cooker which concerns on this embodiment has the same rough structure as the heating cooker 10 which concerns on the said embodiment, detailed description of the structure common to both embodiment is abbreviate | omitted, and it mainly focuses on a different structure. Explained.

In the heating cooker according to the present embodiment, as shown in FIGS. 6 and 7, the gap G is directed upward between the inner peripheral surface 122 d of the upper frame member 122 and the outer peripheral surface 112 b of the ceramic plate 112. Thus, the heat dissipating portions G2 and G2 having a larger opening width than the surroundings are formed.
Specifically, the heat radiation portions G2 and G2 are formed by forming the reduced diameter portions 112c and 112c in which two portions of the outer peripheral surface 112b of the ceramic plate 112 are expanded inward. In addition, in this embodiment, it is set as the structure which forms the thermal radiation part G2 * G2 by making the diameter-reduced part 112c * 112c into two places, However, The diameter-reduced part 112c can also be formed in one place or three places or more.

  In the present embodiment, the heat dissipation efficiency is further improved by releasing the heat of the ceramic plate 112 from the heat dissipation portions G2 and G2 (the reduced diameter portions 112c and 112c) formed in the upper frame member 122 by configuring as described above. Thus, the influence of the heat from the ceramic plate 112 on the peripheral devices of the electromagnetic induction coil 35 can be further reduced.

10 Heating Cooker 11 Body 12 Ceramic Plate (Heating Plate)
12b outer peripheral surface 22 upper frame member 22d inner peripheral surface 23 glass top plate (plate mounting portion)
35 Electromagnetic induction coil G Gap

Claims (6)

A main body comprising: a plate placing portion; an electromagnetic induction coil disposed below the plate placing portion; and a flat cylindrical frame member that supports the plate placing portion at a bottom portion; and the electromagnetic induction. A heating cooker comprising: a heat generating layer that is induction-heated by a coil; and a flat dish-shaped heated plate that is induction-heated to the heat generating layer while being positioned on the upper surface of the plate mounting portion inside the frame member A vessel,
By forming a gap between the inner peripheral surface and the outer circumferential surface of the heating plate of said frame member, and exhaust heat of the heat of the heated plate in the air layer in the gap,
The inclination angle of the inner peripheral surface of the frame member from the horizontal plane is larger than the inclination angle of the outer peripheral surface of the heated plate from the horizontal plane,
A heating cooker characterized in that a heat dissipating part is formed between the inner peripheral surface of the frame member and the outer peripheral surface of the heated plate so that the width of the gap opening upward is larger than the surroundings . The cooking device according to claim 1 , wherein the heat radiating portion is formed by expanding at least one portion of the inner peripheral surface of the frame member to the outside. The cooking device according to claim 2 , wherein an operation display unit is formed in a portion of the frame member where the heat dissipation unit is not formed. The cooking device according to claim 1 , wherein the heat radiating portion is formed by shrinking at least one portion of the outer peripheral surface of the heated plate toward the inside. The cooking device according to any one of claims 2 to 4 , wherein at least two of the heat dissipating portions are formed in portions facing each other across the center of the heated plate. Wherein forming a heated plate with a ceramic plate, the claims 1, characterized in that the formation of the heat generating layer by the heating element is induction-heated by the electromagnetic induction coil affixed to the ceramic plate of claim 5 The heating cooker as described in any one of Claims.

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