WO2016147534A1 - Induction heating element and induction heating vessel - Google Patents

Abstract

An induction heating element 3 of prescribed shape comprising a layered body derived from a heat seal layer 31 layered on an electrical conduction layer 30 that emits heat when overcurrent is induced therein by a high-frequency magnetic field, wherein the element is provided with a heat-seal-layer-unlayered part 31a to which the heat seal layer 31 is unlayered, and a planar fuse function part 32 is formed in a fuse function formation area 32a comprising the electrical conduction layer 30 of the heat-seal-layer-unlayered part 31a. In an induction heating vessel 1 provided with this induction heating element 3, the planar fuse function part 32 does not experience damage during cooking, or when the vessel is stacked for storage or transport, and damage to the vessel body 2 caused by heat during heating up of the induction heating element 3 while empty, etc., can be effectively avoided, enhancing the safety of the vessel.

Description

Induction heating heating element and induction heating container

The present invention includes an induction heating heating element in which an eddy current is induced by a high-frequency magnetic field generated by an electromagnetic induction heating coil included in an electromagnetic cooker and the like, and Joule heat is generated by the electric resistance, and the induction heating heating element is provided. It relates to an induction heating container.

In recent years, instead of cooking appliances that have been mainly gas appliances, cooking appliances generally called electromagnetic cookers are used in the food and beverage industry in terms of safety, cleanliness, convenience, and economy. Not only for use, but also for general households.

However, this type of electromagnetic cooker generates a high-frequency magnetic field by an electromagnetic induction heating coil provided inside, and heats an object to be heated by Joule heat generated by the induced eddy current. For this reason, while cooking can be performed without using flames, the cooking utensils that can be used are limited in principle, and special cooking utensils made of magnetic metals such as iron and iron enamel must be used. There was a restriction.

Under such circumstances, for example, in Patent Document 1, Patent Document 2, etc., a container for an electromagnetic cooker provided with a non-magnetic (or non-conductive) container body as a container that eliminates the restriction of the electromagnetic cooker described above. Has been proposed.

JP 2003-325327 A JP 2014-198231 A

Patent Document 1 proposes a heating method using an electromagnetic cooker that heats an 0.10 to 100 μm aluminum foil by eddy current generated from the electromagnetic cooker, and the contents of a non-magnetic container are transferred to the electromagnetic cooker. Is disclosed.
However, in such a heating method, when the air is accidentally blown, the container may be heated due to the danger that the aluminum foil will be rapidly heated and burned and scattered, or the heat when the aluminum foil is rapidly heated. May be damaged.

On the other hand, Patent Document 2 provides a fuse function unit having a part that is selectively heated excessively and breaks when it is in an empty-cooked state, and the part breaks to produce an electromagnetic cooker. Induction heating heating elements have been proposed in which an electromagnetic cooker stops and finishes heating by the safety mechanism of the above.
However, in patent document 2, the part where the fuse function part breaks is formed on the upper edge side of the part where the conductive material is bent and started up, and when cooking, storing and transporting the container in layers, There was a risk of damaging the launched site.

The present invention has been made in view of the above circumstances, and an induction heating heating element is attached to a non-magnetic (or non-conductive) container main body, and the object to be heated is heated by an electromagnetic cooker or the like. Used as an induction heating container, when cooking, storing and transporting containers in layers,
An induction heating heating element that effectively avoids damage to the container body due to heat generated during heating of the heating element such as air blow without damaging the fuse function part, and the induction heating heating element that enhances the safety of the container. It aims at providing the induction heating container provided with the body.

An induction heating heating element according to the present invention is an induction heating heating element having a predetermined shape formed of a laminate in which a heat seal layer is laminated on a conductive layer that generates heat when an eddy current is induced by a high-frequency magnetic field, the heat seal layer A non-laminated heat seal layer non-laminated portion is provided, and a planar fuse functional portion is formed in a fuse functional portion forming region composed of the conductive layer of the heat seal layer non-laminated portion.

Further, the induction heating container according to the present invention has a configuration in which the above-described induction heating heating element is attached to a container body made of a non-conductive material.

According to the induction heating heating element of the present invention, damage to the fuse function unit is prevented when cooking, or when storing and transporting containers in a stacked manner. As a result, the safety function provided in the electromagnetic cooker detects an abnormality without degrading the function of the fuse function unit when it is in the empty cooking state, and the electromagnetic cooking appliance is automatically stopped to generate heat such as empty cooking. It is possible to prevent damage to the container body due to heat generated when the body is heated.
Furthermore, according to the induction heating container of this invention, it can be set as the induction heating container with which safety | security was improved by providing the said induction heating heating element.

It is a top view which shows the outline of the induction heating container which concerns on 1st embodiment of this invention. It is a side view which shows the outline of the induction heating container which concerns on 1st embodiment of this invention. It is a bottom view which shows the outline of the induction heating container which concerns on 1st embodiment of this invention. FIG. 2 is a schematic sectional view showing an AA section of FIG. 1. It is a perspective view showing the outline of the induction heating heating element concerning a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing a BB cross section of FIG. 1. FIG. 2 is a schematic cross-sectional view showing a CC cross section of FIG. 1. It is a perspective view which shows the outline of the modification of the induction heating heat generating body which concerns on 1st embodiment of this invention. It is a schematic sectional drawing which shows the DD cross section of FIG. It is a perspective view which shows the outline of the other modification of the induction heating heat generating body which concerns on 1st embodiment of this invention. It is a schematic sectional drawing which shows the EE cross section of FIG. It is explanatory drawing which shows the state which accumulated the induction heating container which concerns on 1st embodiment of this invention. It is a top view which shows the outline of the induction heating container which concerns on 2nd embodiment of this invention. It is a schematic sectional drawing which shows the FF cross section of FIG. It is a top view which shows the outline of the induction heating container which concerns on 3rd embodiment of this invention. It is a plane side perspective view showing the outline of the induction heating heating element concerning a third embodiment of the present invention. It is a bottom side perspective view showing the outline of the induction heating heating element concerning a third embodiment of the present invention. FIG. 16 is a schematic cross-sectional view showing the HH cross section of FIG. 15. FIG. 16 is a schematic cross-sectional view showing a II cross section of FIG. 15. It is explanatory drawing which shows the modification of the slit in 3rd embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[First embodiment]
First, a first embodiment of the present invention will be described.
The induction heating container 1 in this embodiment includes a container main body 2 made of a non-conductive material and an induction heating heating element 3 that is attached to the container main body 2 and enables induction heating by an electromagnetic cooker. The container main body 2 has a side wall that is erected so as to surround the inner bottom surface 21 so as to accommodate a liquid object to be heated such as water, and the induction heating heating element 3 is formed of such a container main body. 2 is attached to the inner bottom surface 21 side.

The induction heating container 1 is usually used by being placed on a commercially available electromagnetic cooker. Therefore, the size of the inner bottom surface 21 of the container body 2 and the induction heating heating element 3 attached to the inner bottom surface 21 side of the container body 2 is not particularly limited, and the electromagnetic induction heating coil included in the electromagnetic cooker to be used is not limited. It can be set according to the size. For example, a general electromagnetic induction heating coil provided in a commercially available home-use electromagnetic cooker has an inner diameter of about 5 cm and an outer diameter of about 20 cm. A magnitude | size can be suitably determined according to the electromagnetic cooker assumed.

The shape of the inner bottom surface 21 of the container body 2 is not limited to a square shape as illustrated. For example, in addition to a rectangular shape or a circular shape, a polygonal shape such as a triangle, pentagon, or hexagon may be used. The overall shape of the container body 2 can also be changed to various shapes in consideration of ease of use.

The induction heating heating element 3 attached to the container body 2 is a conductive material made of a conductive material that generates eddy currents by a high-frequency magnetic field generated by an electromagnetic induction heating coil included in an electromagnetic cooker and generates heat due to Joule heat due to its electrical resistance. It is formed by cutting out a laminate formed by laminating a heat seal layer 31 having heat sealability to the container body 2 on the layer 30 into a flat plate-like shape (see FIGS. 5, 8, and 10). ).

As the conductive material forming the conductive layer 30, for example, a metal such as aluminum, nickel, gold, silver, copper, platinum, iron, cobalt, tin, or zinc, or an alloy thereof, heat is generated by induction heating using a high frequency magnetic field. It can be formed using various conductive materials. More specifically, for example, when aluminum is used as the conductive material, the conductive layer 30 can be formed using an aluminum foil having a thickness of preferably about 0.10 to 100 μm, more preferably about 1 to 40 μm. . If the conductive layer 30 is formed using a metal foil such as an aluminum foil, when the induction heating heating element 3 is attached to the container body 2, it can be easily attached via the heat seal layer 31, and the container body 2 Can be adapted to any shape.

The heat seal layer 31 is not particularly limited as long as it has heat sealability with respect to the container body 2, and can be appropriately selected according to the non-conductive material forming the container body 2. Resins that are easy to mold, have good heat-sealing properties, and have moderate heat resistance are preferred, and resins of the same type as the container body 2 described below are particularly preferred. The conductive layer 30 and the heat seal layer 31 can be laminated by a known laminating technique directly or via an appropriate adhesive. By constructing the induction heating heating element 3 as a laminate, conventionally known multilayer film and multilayer sheet manufacturing techniques can be applied, so that the manufacturing becomes easy.

As the non-conductive material for forming the container body 2, a synthetic resin material such as a polystyrene resin such as polystyrene, a polyester resin such as polyethylene terephthalate, a polyolefin resin such as polypropylene, and a polyamide resin can be suitably used. The container body 2 may be a single layer or a multilayer structure in which these resins are combined with other functional resins. As the non-conductive material, paper, glass or the like can be used, but the above-mentioned synthetic resin is laminated or coated on the inner surface in consideration of heat sealability with the heat seal layer 31 of the induction heating heating element 3. Is preferred. By forming the container body 2 with these materials, it is possible to provide the induction heating container 1 capable of cooking using an electromagnetic cooker at a low cost.

In this embodiment, the induction heating heating element 3 is formed in a substantially circular shape, and the heat seal layer non-laminated portion 31a extends in the radial direction. This will be described later. The shape of the induction heating heating element 3 is most efficient when it is circular due to the characteristics of the induced eddy current, but it may be square or rectangular according to the shape of the container body 2. The direction from the center side to the outer peripheral edge side of these figures shall be said.

In addition, as shown in FIGS. 1, 5, and 6, the induction heating heating element 3 includes a central region CF and cutting lines 33a and 33b that concentrically cut the conductive layer 30 along the circumferential direction. It is partitioned into a main heating area HF and a peripheral area OF. A plurality of main heating regions HF positioned between the cutting lines 33a and 33b are radially formed by cutting lines 33c, 33d, and 33e that cut the conductive layer 30 along the circumferential direction concentrically with the cutting lines 33a and 33b. The heating regions HF1, HF2, and HF3 are partitioned, and the region between the cutting lines 33c and 33d is partitioned into a plurality of regions in the circumferential direction by a cutting line 34b extending in the radial direction.

Further, the central region CF located inside the cutting line 33a is divided into a plurality of regions in the circumferential direction by a cutting line 34a extending in the radial direction. Further, the peripheral area OF positioned outside the cutting line 33b is divided into a plurality of areas in the circumferential direction by a cutting line 34c extending in the radial direction.

When the conductive layer 30 is cut, the conductive layer 30 may be cut from the side of the conductive layer 30 with a blade, or the conductive layer 30 may be selectively cut using a YAG laser, a semiconductor laser, or the like. As long as there is no problem in handling the induction heating heating element 3 as an integral part, the heat seal layer 31 may be partially cut, but if the heat seal layer 31 is connected without being cut. In addition, since the induction heating heating element 3 can be handled as an integral body, handling during manufacture becomes extremely easy.

By cutting the conductive layer 30 of the induction heating heating element 3 to form the cutting lines 33a, 33b, 33c, 33d, 33e, 34a, 34b, and 34c, the eddy current induced in the conductive layer 30 is converted into the cutting line 33a. , 33b, 33c, 33d, 33e, 34a, 34b, and 34c. For this reason, an eddy current is induced for each region defined by the cutting lines 33a, 33b, 33c, 33d, 33e, 34a, 34b, and 34c.

The eddy current induced in the induction heating heating element 3 placed on the electromagnetic induction heating coil is induced according to the shape of the electromagnetic induction heating coil. Usually, the eddy current induced in the central region CF is not so strong, but the current density distribution is somewhat unstable, and the eddy current flowing outside may be disturbed. For this reason, the division | segmentation into the center part area | region CF and the main heating area | region HF by the cutting line 33a can reduce the influence on the main heating area | region HF.

The positions where the cutting lines 33a and 33b that partition the main heating region HF are formed are regions where the current density distribution of the induced eddy current is stable and the conductive layer 30 can efficiently generate heat. It can adjust suitably according to the magnitude | size, shape, etc. of the induction heating heat generating body 3 so that it can divide as.

In addition, the current density distribution of the induced eddy current is generally not uniform along the radial direction of the electromagnetic induction heating coil, and has a current density peak at a position slightly closer to the outer periphery with respect to the radial center, The object to be heated tends to be strongly heated at that position. In consideration of such eddy current distribution, the main heating region HF is divided into a plurality of heating regions HF1, HF2, and HF3 in the radial direction.
The positions where the cutting lines 33c, 33d, and 33e that divide the main heating region HF into a plurality of heating regions HF1, HF2, and HF3 in the radial direction are formed to control the induced eddy current to equalize the heating of the object to be heated. It can adjust suitably so that can be aimed at. For example, the cutting lines 33c, 33d, and 33e that divide the main heating region HF into a plurality of regions are densely provided near the outer periphery so that eddy currents are not concentrated near the outer periphery, rather than being arranged uniformly in the radial direction. preferable.

Thus, in the present embodiment, the main heating region HF is partitioned by the cutting lines 33a and 33b that cut the conductive layer 30 along the circumferential direction, and the conductive layer 30 is cut along the circumferential direction. By dividing the main heating region HF into a plurality of heating regions HF1, HF2, and HF3 by the lines 33c, 33d, and 33e, the eddy current induced in the main heating region HF is controlled so that the main heating region HF is as uniform as possible. It generates heat.
By doing in this way, the heating nonuniformity of a to-be-heated material can be suppressed, liquid to-be-heated materials, such as water, can be prevented from being heated locally rapidly, and generation | occurrence | production of bumping can be suppressed. Further, the edges of the cutting lines 33a, 33b, 33c, 33d, and 33e in the main heating area HF (heating areas HF1, HF2, and HF3) are used when bubbles are generated by boiling a liquid heated object such as water. The starting point. For this reason, a large number of small bubbles are continuously generated as when boiling stones are added during heating, and the occurrence of sudden large bubbles is prevented, thereby preventing the occurrence of sudden boiling.
As a result, it is possible to avoid a situation in which the user is burned by the object to be heated scattered by bumping or the vicinity of the electromagnetic cooker is soiled.

Further, as described above, the central region CF is partitioned into a plurality of regions in the circumferential direction by the cutting line 34a, and the peripheral region OF is also partitioned into a plurality of regions in the circumferential direction by the cutting line 34c. . In this way, by dividing the central region CF and the peripheral region OF into a plurality of small regions, a strong eddy current around the center of the electromagnetic induction heating coil included in the electromagnetic cooker is induced in each region. The central region CF and the peripheral region OF are not so hot. Therefore, if heat-sealing is performed with the heat seal layer 31 in the central region CF and the peripheral region OF and the induction heating heating element 3 is attached to the container main body 2, heat transfer to the container main body 2 can be suppressed. Damage can be prevented.

Furthermore, even in the region between the cutting lines 33c and 33d formed in the main heating region HF, by dividing into a plurality of regions in the circumferential direction by the cutting line 34b, heat generation in the region is suppressed, and the region The container body 2 is heat sealed with the heat seal layer 31 in FIG.
In this way, a region in which heat generation is suppressed is formed not only in the central region CF and the peripheral region OF of the induction heating heating element 3 but also in the region between the cutting lines 33c and 33d of the main heating region HF. The heat seal layer 31 in the case is also heat-sealed with the container main body 2 to effectively suppress the convection and flow of the object to be heated, or the lifting or undulation of the induction heating heating element 3 due to repulsion with the electromagnetic induction heating coil. And more stable heating is possible.

Moreover, in this embodiment, since the induction heating heating element 3 is formed in a substantially circular shape, the heat seal layer 31 is formed with a predetermined width along the radial direction passing through the center of the induction heating heating element 3. A strip-shaped heat seal layer non-laminated portion 31a (conductive layer 30) extending in the radial direction intersecting with the main heating region HF (heating regions HF1, HF2, HF3) is provided. And the area | region which cross | intersects the heat seal layer non-lamination part 31a of the main heating area | region HF is made into the fuse functional part formation area 32a which consists of the conductive layer 30, and a liquid to-be-heated object is in this area | region 32a in the case of heat cooking. Excessive heat is generated selectively when the air is boiled and evaporated, or when the object to be heated is not contained in the container. Thus, a planar fuse function portion 32 that is broken is formed.

The planar fuse function unit 32 causes the current density of the eddy current to be biased so as to exhibit the above-described function in a shape that does not involve a three-dimensional process in which the conductive material of the conductive layer 30 is bent and started up. If it is formed as a site where the height is the highest, the specific form is not limited. For example, as shown in FIGS. 1, 5, and 7, the heating regions HF1, HF2, and HF3 defined by the cutting lines 33a and 33c, the cutting lines 33d and 33e, and the cutting lines 33e and 33b of the main heating region HF. A slit that cuts a part of the conductive layer 30 along the extending direction of the heat seal layer non-laminate portion 31a, with the region intersecting the heat seal layer non-laminate portion 31a as a fuse function portion forming region 32a. By forming 35 a, 35 b, 35 c, 35 d, and 35 e, the part left in the conductive layer 30 can function as the planar fuse function unit 32.
By doing so, the current density of eddy currents induced in the heating regions HF1, HF2, and HF3 is biased, and the current density in the part remaining in the conductive layer 30 is the highest. As a result, the planar fuse function part in which the part remaining in the conductive layer 30 selectively generates heat excessively and breaks when it is in an empty state where heat transfer to the object to be heated is not performed. 32 functions.

When the planar fuse function part 32 breaks, the conduction of the eddy current is cut off, and the safety device of the electromagnetic cooker detects the abnormality, whereby the electromagnetic cooker stops and the heating ends. 2 damage can be prevented. Further, since the heating time can be controlled by the amount of the object to be heated, the planar fuse function unit 32 is applied as a cooking timer when the induction heating container 1 is used as a disposable container for steam cooking. You can also
In addition, the induction heating heating element 3 is provided with the heat seal layer non-laminate portion 31a, and the planar fuse function portion 32 is formed in the heat seal layer non-laminate portion 31a. The heat seal layer 31 is not damaged by heat.

As shown in FIGS. 8 and 9, the planar fuse function part 32 has a fuse function that intersects with the heat seal layer non-lamination part 31 a in the main heating area HF (heating areas HF1, HF2, HF3). It is also possible to cut and form cut lines 36a, 36b, 36c in the conductive layer 30 along the extending direction of the heat seal layer non-laminated portion 31a in the portion forming region 32a. In this case, the current density at the portion where the thickness is reduced by engraving the cut lines 36a, 36b, and 36c is the highest, and when the air is in a state where the heat transfer to the object to be heated is not performed. In addition, the portion functions as a planar fuse function portion 32 that selectively generates excessive heat and breaks.

Further, as shown in FIGS. 10 and 11, the planar fuse functional unit 32 is a fuse that intersects the heat seal layer non-laminated portion 31a in the main heating region HF (heating regions HF1, HF2, and HF3). Circular punching holes 37a, 37b, and 37c that leave a part of the conductive layer 30 along the extending direction of the heat seal layer non-laminated portion 31a can also be formed in the functional portion forming region 32a. In this case, the punched holes 37a, 37b, and 37c are formed, and the current density of the conductive layer 30 that remains in the radial direction is the highest, and the punched state in which heat transfer to the object to be heated is not performed. When this occurs, the part functions as a planar fuse function part 32 that selectively generates excessive heat and breaks.
Note that the size and number of the punched holes 37a, 37b, and 37c that leave a part of the conductive layer 30 are appropriately selected according to the range of the main heating region HF. The appropriate shape can be adopted.

By doing so, the planar fuse function part 32 is formed without bending and raising the conductive layer 30, and when cooking or when storing and transporting the containers as shown in FIG. In addition, it can be formed without having a raised portion that is easily damaged.

In the above-described example, the heat sealing layer non-lamination portion 31a of the heating regions HF1, HF2, and HF3 defined by the cutting lines 33a and 33c, the cutting lines 33d and 33e, and the cutting lines 33e and 33b of the main heating region HF Although the intersecting regions are defined as fuse function portion formation regions 32a, the fuse function portions 32 are formed in the respective regions. However, the present invention is not limited to this. When the main heating region HF is partitioned into a plurality of regions, a region that intersects the heat seal layer non-stacked portion 31a of at least one region of the partitioned main heating region HF is defined as a fuse function portion forming region 32a in a planar shape. The fuse function unit 32 may be formed.
Further, in the above-described example, the induction heating heating element 3 is formed in a circular shape, and the heat seal layer non-stacking portion 31a is provided along the radial direction passing through the center of the induction heating heating element 3, but the heat seal layer non-stacking is performed. The part 31a is not limited to this as long as the part 31a is provided so as to cross the main heating region HF and extend in a strip shape.

In attaching the induction heating heating element 3 to the container main body 2, it is preferable that the induction heating heating element 3 is attached separately from the inner bottom surface 21 of the container main body 2.
By attaching the induction heating heating element 3 away from the inner bottom surface 21 of the container main body 2, a liquid heated object such as water accommodated in the container main body 2 is allowed to move to the inner bottom surface of the induction heating heating element 3 and the container main body 2. It will come to and from 21. As a result, the heating efficiency for the object to be heated can be increased, and the container main body 2 can be effectively avoided from being damaged by the heat from the induction heating heating element 3. Further, in order to prevent the container body 2 from being damaged, a hole or slit 38 that penetrates the conductive heating heating element 3 is provided on the back side of the induction heating heating element 3 so as to promote convection without stagnation of the heated object. Can be formed.

In the present embodiment, as shown in FIG. 4, a first support portion 22 a provided protruding near the center of the inner bottom surface 21 of the container body 2 and a second support portion 22 b provided protruding toward the outer peripheral side thereof. Further, the induction heating heating element 3 is heat-sealed to the third support portion 22c provided so as to protrude from the outer peripheral side thereof, thereby attaching the induction heating heating element 3 away from the inner bottom surface 21 of the container body 2. . A heat seal portion between these support portions 22a, 22b, 22c and the induction heating heating element 3 is shown by hatching in FIG.

Further, when the induction heating heating element 3 is attached to be separated from the inner bottom surface 21 of the container body 2, the height of the support portions 22a, 22b, and 22c is set to the first support portion 22a, the second support portion 22b, and the third support. In a state where the height of the induction heating heating element 3 attached to the container main body 2 with respect to the inner bottom surface 21 is increased toward the outer peripheral side in order of the portion 22c, the center side is higher and the height is lower toward the peripheral edge. It is preferable that By adopting such a configuration, when the object to be heated is water or the like, when the amount of water in the container is less than a predetermined amount, the object to be heated flows from the center of the induction heating heating element 3 to the periphery thereof, and induction heating is performed. It stays in the gap between the inner bottom surface of the container body 2 and the heat seal layer 31 of the induction heating element 3 from the unheat-sealed portion of the peripheral region OF of the heating element 3 with the container body 2. In this way, by retaining the object to be heated, damage to the container 1 due to overheating of the induction heating heating element 3 caused by the decrease in the object to be heated can be prevented via the object to be heated.

Furthermore, in this embodiment, for example, as shown in FIG. 4, a step portion 23 is provided at the periphery of the opening of the container body 2 so that the tray 4 on which the food is placed can be supported or fitted. can do.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
In the first embodiment described above, the conductive layer 30 is partitioned into the central region CF, the main heating region HF, and the peripheral region OF by a plurality of cutting lines 33a and 33b along the circumferential direction, and the heat seal layer The non-stacked portion 31a is provided extending in a strip shape so as to intersect with the main heating region HF, and the intersecting region is defined as a fuse function portion forming region 32a.
In this embodiment, the conductive layer 30 is not divided into these regions, and the fuse function portion forming region 32a composed of the conductive layer 30 of the heat seal layer non-laminated portion 31a in which the heat seal layer 31 is non-laminated is planar. The point which formed the fuse function part 32 differs from 1st embodiment.

Specifically, as shown in FIGS. 13 and 14, in the present embodiment, a circular heat seal layer non-laminate portion 31 a inscribed in the periphery of the induction heating heating element 3 is provided. Then, a circular hole 38 is formed in the fuse function part forming region 32a composed of the conductive layer 30 of the heat seal layer non-laminated part 31a, leaving the conductive layer 30 around the fuse functional part forming region 32a. As described above, by forming the hole 38 in the conductive layer 30 of the fuse function part formation region 32a, the current density of the eddy current induced in the induction heating element 3 is biased, and the periphery of the induction heating element 3 is increased. The current density of the conductive layer 30 remaining between the hole 38 and the hole 38 becomes the highest. As a result, when it is in an empty state where heat transfer to the object to be heated is not performed, the part functions as a planar fuse function part 32 that selectively generates excessive heat and breaks.

As described above, the planar fuse function unit 32 of the present embodiment does not form the conductive layer 30 by bending up and stacks containers as shown in FIG. Therefore, the planar fuse function unit 32 is not damaged when stored and transported.
In the present embodiment, other configurations are the same as those in the first embodiment, and the description thereof is omitted.

[Third embodiment]
Next, a third embodiment of the present invention will be described.
FIG. 15 is a plan view schematically showing the induction heating container according to the present embodiment, the side view of which is the same as the side view (FIG. 2) of the first embodiment, and the bottom view is the first embodiment. It appears the same as the bottom view (FIG. 3). 15 is the same as the cross-sectional view (FIG. 4) showing the AA cross section of FIG.

In the present embodiment, as in the first embodiment described above, the conductive layer 30 is divided into a central region CF, a main heating region HF, and a peripheral region OF by a plurality of cutting lines 33a and 33b along the circumferential direction. The heat seal layer non-laminated portion 31a is provided so as to extend in a band shape intersecting with the main heating region HF, and the intersecting region is defined as a fuse function portion forming region 32a. The form of the planar fuse function part 32 to be formed is different from that of the first embodiment.

That is, in this embodiment, as shown in FIGS. 15 and 16, the heating regions HF1 and HF2 defined by the cutting lines 33a and 33c, the cutting lines 33d and 33e, and the cutting lines 33e and 33b of the main heating region HF. , HF3 that intersect with the heat seal layer non-laminated portion 31a is defined as a fuse function portion forming region 32a, and the conductive layer 30 is cut across the heat seal layer non-laminated portion 31a. , HF2, and HF3, arc-shaped slits 39a, 39b, and 39c that are in contact with each other on the heat seal layer 31 are formed on one of the cutting lines 33a, 33d, and 33e located on the inner peripheral side. And the width | variety between the other cutting line 33c, 33e, 33b located in the outer peripheral side which divides heating area | region HF1, HF2, HF3, and slit 39a, 39b, 39c is made narrow, and this part (slit 39a, The portions of the slits 39a, 39b, and 39c that are in contact with both ends of the slits 39a, 39b, and 39c are located on the side opposite to the cutting lines 33a, 33d, and 33e) to function as the planar fuse function portion 32.

By doing so, the current density of eddy currents induced in the heating regions HF1, HF2, and HF3 is biased and formed between the cutting lines 33c, 33e, and 33b and the slits 39a, 39b, and 39c, respectively. The current density in the planar fuse function unit 32 is the highest. As a result, the planar fuse function part 32 selectively generates heat excessively and breaks when it is in an empty state where heat transfer to the object to be heated is not performed.
Further, even in such a planar fuse function section 32, the conductive layer 30 is formed in a planar shape without being bent and raised, so that when cooking, as shown in FIG. When transported, the planar fuse function part 32 is prevented from being damaged.

The slits 39a, 39b, and 39c are particularly preferably formed in an arc shape in order to make it difficult for the induced eddy current to be disturbed, but the invention is not limited to this. The slits 39a, 39b, and 39c only need to be able to form a portion that functions as the planar fuse functional portion 32 by narrowing the width between the other cutting lines 33c, 33e, and 33b located on the opposite outer peripheral side. Is formed so as to protrude in a direction away from one cutting line 33a, 33d, 33e located on the inner peripheral side where both ends of the slits 39a, 39b, 39c are in contact.

Further, as shown in FIG. 20A, the slits 39a, 39b, and 39c are formed by cutting the conductive layer 30 across the heat seal layer non-laminated portion 31a, and the outer periphery that partitions the heating regions HF1, HF2, and HF3. One of the cutting lines 33c, 33e, 33b positioned on the side is formed as arc-shaped slits 39a, 39b, 39c whose both ends are in contact with each other on the heat seal layer 31, and the inner circumference that defines the heating regions HF1, HF2, HF3 The width between the other cutting lines 33a, 33d, and 33e located on the side and the slits 39a, 39b, and 39c may be narrowed, and this portion may be used as the planar fuse function portion 32.
FIG. 20 shows a modified example of the slit 39a by enlarging the portion surrounded by the chain line in FIG.

Furthermore, as shown in FIG. 20B, the slits 39a, 39b, 39c are formed by cutting the conductive layer 30 across the heat seal layer non-laminated portion 31a, and partition the heating regions HF1, HF2, HF3. Arc-shaped slits 39a, both ends of which are in contact with each other on the heat seal layer 31, respectively, on one cutting line 33a, 33d, 33e located on the circumferential side and the other cutting line 33c, 33e, 33b located on the outer circumferential side. 39b and 39c may be formed, and the narrow portion between the slits 39a, 39b and 39c may be used as the planar fuse function portion 32.

That is, the planar fuse functional unit 32 is formed by cutting the conductive layer 30 across the heat seal layer non-laminated portion 31a, and cutting at least one of the inner peripheral side and the outer peripheral side that partitions the heating regions HF1, HF2, and HF3. By forming slits 39a, 39b, and 39c whose ends are in contact with the line, the slits 39a, 33d, and 33e on the inner circumferential side are formed in a planar shape between the cutting lines 33c, 33e, and 33b on the outer circumferential side. It ’s fine.
Note that a general electromagnetic induction heating coil provided in a commercially available home-use electromagnetic cooker has an inner diameter of about 5 cm and an outer diameter of about 20 cm, and the heating coil diameter is small. In such a case, the eddy current is cut off on the outer peripheral cutting line 33c. , 33e, 33b and the slits 39a, 39b, 39c, the fuse function unit 32 operates more safely and the container body 2 is prevented from being damaged.

Further, in the present embodiment, both ends of the slits 39a, 39b, and 39c are formed so as to straddle the heat seal layer non-stacked portion 31a and contact the inner peripheral cutting lines 33a, 33d, and 33e on the heat seal layer 31. Thus, the conductive layer 30 is not cut off and dropped off. On the other hand, both ends of the slits 39a, 39b, and 39c do not straddle the heat seal layer non-laminate portion 31a, and come into contact with the inner peripheral cutting lines 33a, 33d, and 33e in the heat seal layer non-laminate portion 31a. If formed, the conductive layer 30 is cut off by the slits 39a, 39b, and 39c and falls off. When the induction heating heating element 3 is manufactured, the falling pieces that have been cut off due to the conductive layer 30 must be processed as cutting waste, which requires time and effort. According to this embodiment, The induction heating heating element 3 can be manufactured without requiring such labor.
However, as long as the processing of cutting waste does not become a problem at the time of manufacture, the slits 39a, 39b, and 39c do not straddle the heat seal layer non-laminated portion 31a at both ends as described above. The laminated portion 31a may be formed so as to be in contact with the inner peripheral cutting lines 33a, 33d, and 33e, and the fuse functional portion 32 is formed between the other outer peripheral cutting lines 33c, 33e, and 33b. If it is, it will not be limited to the said aspect.

Further, when the main heating region HF is partitioned into a plurality of regions, a region intersecting with the heat seal layer non-laminated portion 31a of at least one region of the partitioned main heating region HF is defined as a fuse function portion forming region 32a. The planar fuse functional unit 32 may be formed in the same manner as in the first embodiment, but the main heating region HF is divided as one heating region according to the size and shape of the induction heating heating element 3. May be.
In other words, the cutting lines 33c, 33d, and 33e that divide the main heating region HF into a plurality of heating regions HF1, HF2, and HF3 may be omitted. In such a case, a slit is formed so that both ends thereof are in contact with at least one of the inner peripheral cutting line 33a or the outer peripheral cutting line 33b that defines the main heating region HF, and the inner peripheral cutting is performed. The planar fuse function part 32 may be formed between the line 33a and the outer peripheral cutting line 33b.

Furthermore, in the present embodiment, the cutting line 33a that divides the central region CF and the main heating region HF is located on the outer peripheral side compared to the first embodiment, and the central region CF is an induction heating heating element. 3 is divided into a plurality of regions in the circumferential direction by a plurality of cutting lines 34a that radially cut the conductive layer 30 from the center side toward the outer peripheral edge side, and the conductive layer concentrically with the cutting lines 33a along the circumferential direction. It is also divided into a plurality of regions in the radial direction by a cutting line 33 f that cuts 30.
In the example shown in the drawing, the central region CF is divided into eight regions in the circumferential direction by the radial cutting lines 34a, and is divided into two regions in the radial direction by the cutting lines 33f. Although heat generation is suppressed by dividing, it is not limited to this. If the heat generation in the central region CF can be suppressed, the number of radial cutting lines 34a that divide the central region CF into a plurality of regions in the circumferential direction is increased or decreased according to the size and shape of the induction heating heating element 3, The cutting line 33f that divides the partial region CF in the radial direction may be omitted or increased or decreased.

This embodiment is different from the first embodiment in the above points, but the other configurations are the same as those of the first embodiment, and the description thereof is omitted.

Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made within the scope of the present invention.

All the contents of the documents described in this specification and the content of the Japanese application that forms the basis of the Paris priority of the present application are incorporated herein.

As described above, the present invention provides an induction heating container that can heat an object to be heated safely and easily with a commercially available electromagnetic cooker.

DESCRIPTION OF SYMBOLS 1 Induction heating container 2 Container body 3 Induction heating heating element 30 Conductive layer 31 Heat seal layer 31a Heat seal layer non-lamination part 32 Planar fuse function part 32a Fuse function part formation area 33a to f Cut line 34a to c Cut line 35a to e Slit 36a to c Cut line 37a to c Punching hole 38a to c Slit CF Central region HF Main heating region HF1 to 3 Heating region OF Peripheral region

Claims (14)

1. An induction heating heating element comprising a laminate in which a heat seal layer is laminated on a conductive layer that generates heat when an eddy current is induced by a high-frequency magnetic field,
   A heat seal layer non-laminated portion in which the heat seal layer is not laminated is provided, and a planar fuse function portion is formed in a fuse function portion forming region formed of the conductive layer of the heat seal layer non-laminated portion. Induction heating heating element.
2. The conductive layer is partitioned into a central region, one or a plurality of heating regions, and a peripheral region by a cutting line that cuts the conductive layer along a circumferential direction,
   The heat seal layer non-laminated portion is provided extending in a belt shape so as to intersect with the heating region, and a region intersecting the heat seal layer non-laminated portion of at least one of the heating regions is defined as the fuse function portion forming region. The induction heating heating element according to claim 1.
3. A slit formed by cutting the conductive layer is formed in the conductive layer in the fuse function portion formation region, leaving a part along the extending direction of the heat seal layer non-laminated portion, and is left in the conductive layer. The induction heating heating element according to claim 2, wherein the part is the planar fuse function unit.
4. A cut line is engraved along the extending direction of the heat seal layer non-lamination portion in the conductive layer in the fuse function portion forming region, and a portion where the thickness of the conductive layer is reduced is defined as the planar fuse function portion. The induction heating heating element according to claim 2.
5. A punched hole is formed in the conductive layer in the fuse function portion formation region leaving a part along the extending direction of the heat seal layer non-laminated portion, and the part left in the conductive layer is The induction heating heating element according to claim 2, wherein the induction heating heating element is a planar fuse functional part.
6. Cutting at least the conductive layer in the fuse function part formation region, forming a slit whose both ends are in contact with at least one of the cutting lines on the inner peripheral side or the outer peripheral side defining the heating region; The induction heating heating element according to claim 2, wherein a portion opposite to the cutting line side where both ends of the slit are in contact with each other is a planar fuse function part.
7. The induction heating heating element according to claim 6, wherein a slit whose both ends are in contact with the cutting line on the inner peripheral side that divides the heating region is formed.
8. The induction heating heating element according to claim 6 or 7, wherein the slit cuts the conductive layer across the heat seal layer non-laminated portion, and both ends of the slit are in contact with the cutting line on the heat seal layer.
9. The induction heating heating element according to any one of claims 6 to 8, wherein the slit protrudes in a direction away from the cutting line where both ends of the slit are in contact.
10. The induction heating heating element according to claim 9, wherein the slit is formed in an arc shape.
11. The heating region is partitioned into a plurality of regions by a plurality of cutting lines that cut the conductive layer along a circumferential direction, and the cutting lines that partition the heating region into a plurality of regions are provided close to the outer periphery. The induction heating heating element according to any one of claims 1 to 10.
12. The induction heating according to any one of claims 1 to 11, wherein the central region is partitioned into a plurality of regions by a plurality of radial cutting lines that radially cut the conductive layer from a center side toward an outer peripheral edge side. Heating element.
13. The induction heating element according to any one of claims 1 to 12, wherein the central region is divided into a plurality of regions by one or a plurality of cutting lines that cut the conductive layer along a circumferential direction.
14. An induction heating container, wherein the induction heating heating element according to any one of claims 1 to 13 is attached to a container body made of a non-conductive material.

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