JP2017077396A - Induction heating exothermic body, and induction heating container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating container that is used as an induction heating container for heating a stored object to be heated by using an electromagnetic cooker and the like, avoids a fuse function part from being damaged in cooking or in storing or carrying stacked containers, and improves safety of the container by effectively avoiding damage to a container body caused by heat at the time of temperature rise of an exothermic body such as at the time of no-water burning.SOLUTION: In at least one of heating areas HF1, HF2, HF3 are formed with slits 35a, 35b, 35c, each of which has both ends in contact with at least one of inner peripheral side and outer peripheral side circumferential direction cutting lines 33a, 33d, 33e (33c, 33e, 33b) that cut a conductive layer 30 in a heat seal layer non-laminate part 31a to define the heating areas HF1, HF2, HF3. A planar fuse function part 32 is formed between the inner peripheral side circumferential direction cutting lines 33a, 33d, 33e and the outer peripheral side circumferential direction cutting lines 33c, 33e, 33b, where the inner peripheral side and outer peripheral side circumferential direction cutting lines define the heating areas HF1, HF2, HF3.SELECTED DRAWING: Figure 1

Description

  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 an 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 a 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 raised, and when cooking, storing and transporting the container in layers There was a risk of damaging this raised 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. It is used as an induction heating container.When cooking, stacking and storing and transporting containers, the fuse function is not damaged, and damage to the container body due to heat generated when the heating element rises, such as emptying. An object of the present invention is to provide an induction heating heating element that is effectively avoided to increase the safety of the container, and an induction heating container including the induction heating heating element.

  An induction heating heating element according to the present invention is 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, and the conductive heating element is arranged along a circumferential direction. Heat seal layer non-lamination in which the heat seal layer is non-laminated while being partitioned into a central region, one or more heating regions, and a peripheral region by a plurality of circumferential cutting lines that cut the layer The section is provided in a belt shape so as to intersect with the heating region, and at least one of the heating regions, the conductive layer in the heat seal layer non-laminated portion is cut, and the heating region is divided into an inner peripheral side or an outer peripheral side Forming a slit whose both ends are in contact with at least one of the circumferential cutting lines, and between the circumferential cutting line on the inner circumferential side and the circumferential cutting line on the outer circumferential side that partitions the heating region, Fuse machine Part is a configuration in which the formation.

  Moreover, 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.
Moreover, 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 embodiment of this invention. It is a side view which shows the outline of the induction heating container which concerns on embodiment of this invention. It is a bottom view which shows the outline of the induction heating container which concerns on embodiment of this invention. It is a schematic sectional drawing which shows the AA cross section of FIG. It is a plane side perspective view showing the outline of the induction heating heating element concerning the embodiment of the present invention. It is a bottom side perspective view showing the outline of the induction heating heating element concerning the embodiment of the present invention. It is a schematic sectional drawing which shows the BB cross section of FIG. It is a schematic sectional drawing which shows the CC cross section of FIG. It is explanatory drawing which shows the modification of a slit. It is explanatory drawing which shows the state which accumulated the induction heating container which concerns on embodiment of this invention.

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

  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 with respect to the container body 2 on the layer 30 into a predetermined shape of a flat plate shape (FIGS. 6, 7, and 8). reference).

  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 nonconductive 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 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 the present 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, which 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.

  As shown in FIGS. 1, 5, 7, and 8, the induction heating heating element 3 according to the present embodiment is formed by circumferential cutting lines 33 a and 33 b that concentrically cut the conductive layer 30 along the circumferential direction. The central region CF, the main heating region HF, and the peripheral region OF are partitioned. And the main heating area | region HF located between the circumferential direction cutting lines 33a and 33b is the circumferential direction cutting lines 33c and 33d which cut | disconnect the conductive layer 30 along the circumferential direction concentrically with the circumferential direction cutting lines 33a and 33b. 33e is divided into a plurality of heating regions HF1, HF2, and HF3 in the radial direction, and a region between the circumferential cutting lines 33c and 33d is divided into a plurality of circumferential directions by a radial cutting line 34b extending in the radial direction. It is divided into areas.

  Further, the central region CF located inside the circumferential cutting line 33a is surrounded by a plurality of radial cutting lines 34a that radially cut the conductive layer 30 from the center side of the induction heating heating element 3 toward the outer peripheral edge side. It is divided into a plurality of regions in the direction, and is also divided into a plurality of regions in the radial direction by a circumferential cutting line 33f that cuts the conductive layer 30 along the circumferential direction concentrically with the circumferential cutting line 33a. Furthermore, the peripheral area OF positioned outside the cutting line 33b is divided into a plurality of areas in the circumferential direction by a radial 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 heater 3 to form the cutting lines 33a, 33b, 33c, 33d, 33e, 33f, 34a, 34b, and 34c, the eddy current induced in the conductive layer 30 is cut. It does not flow in the direction crossing the lines 33a, 33b, 33c, 33d, 33e, 33f, 34a, 34b, 34c. For this reason, an eddy current is induced for each region defined by the cutting lines 33a, 33b, 33c, 33d, 33e, 33f, 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, it is possible to reduce the influence on the main heating region HF by dividing the central region CF and the main heating region HF by the circumferential cutting line 33a.
The positions where the circumferential cutting lines 33a and 33b that define the main heating region HF are formed are regions where the induced eddy current distribution 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 partition as the main heating area | region HF.

  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 circumferential 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 controlled by controlling the induced eddy currents. It can adjust suitably so that equalization can be achieved.

  Thus, in the present embodiment, the main heating region HF is defined by the circumferential 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 circumferential cutting lines 33c, 33d, and 33e, the eddy current induced in the main heating region HF is controlled, and the main heating region HF Is designed to generate heat as evenly as possible.

  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. Furthermore, at the edges of the circumferential cutting lines 33a, 33b, 33c, 33d, and 33e in the main heating region HF (heating regions HF1, HF2, and HF3), liquid objects to be heated such as water boil and bubbles are generated. It becomes 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 divided into a plurality of regions in the circumferential direction by the radial cutting lines 34a, and is also divided into a plurality of regions in the radial direction by the circumferential cutting lines 33f. The partial area OF is also divided into a plurality of areas in the circumferential direction by the radial 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, the heat generation in the region is suppressed by dividing into a plurality of portions in the circumferential direction by the cutting line 34b. The container body 2 is heat sealed with the sealing layer 31.
In this manner, not only the central region CF and the peripheral region OF of the induction heating element 3 but also a region where heat generation is suppressed is formed between the cutting lines 33c and 33d of the main heating region HF, and the heat in the region is heated. By heat-sealing the container body 2 with the sealing layer 31 as well, convection and flow of the object to be heated, or lifting or undulation of the induction heating heating element 3 due to repulsion with the electromagnetic induction heating coil can be effectively suppressed. , More stable heating becomes 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) that is removed and intersects with the main heating region HF (heating regions HF1, HF2, HF3) is provided. And in the area | region which cross | intersects each heat seal layer non-lamination part 31a of heating area | region HF1, HF2, HF3, in the case of a heating cooking, when a liquid to-be-heated material boils and evaporates and decreases, When a heated object is not accommodated, such as when the object to be heated is in an empty state where heat transfer to the object to be heated is not performed, a planar fuse function part 32 that selectively generates heat and breaks is formed. Has been.

The planar fuse function portion 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 three-dimensional processing of bending and raising the conductive material of the conductive layer 30, It is formed as a part where the density is highest.
In the present embodiment, as shown in FIGS. 1 and 5, 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. The conductive layer 30 is cut across the heat seal layer non-laminated portion 31a, and one circumferential cutting line 33a, 33d, 33e located on the inner peripheral side that partitions the heating regions HF1, HF2, HF3. Further, arc-shaped slits 35a, 35b, and 35c that are in contact with each other on the heat seal layer 31 are formed. And the width between the other circumferential cutting lines 33c, 33e, 33b located on the outer peripheral side that partitions the heating regions HF1, HF2, HF3 and the slits 35a, 35b, 35c is narrowed, and this portion is flat. It functions as a fuse function unit 32 having a shape.
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 fuse function unit 32 becomes the highest. As a result, the 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.

  Note that the slits 35a, 35b, and 35c are particularly preferably formed in an arc shape in order to make it difficult to disturb the induced eddy current, but the invention is not limited to this. If the slits 35a, 35b, and 35c can narrow the width between the other circumferential cutting lines 33c, 33e, and 33b located on the opposite outer peripheral side to form a portion that functions as the planar fuse function portion 32. The slits 35a, 35b, and 35c are preferably formed so as to protrude in a direction away from one of the circumferential cutting lines 33a, 33d, and 33e located on the inner peripheral side where both ends of the slits 35a, 35b, and 35c are in contact.

  Moreover, as shown to Fig.9 (a), slit 35a, 35b, 35c cut | disconnects the conductive layer 30 across the heat seal layer non-lamination part 31a, and the outer peripheral side which divides heating area HF1, HF2, HF3 Arc-shaped slits 35a, 35b, and 35c whose both ends are in contact with each other on the heat seal layer 31 are formed in one circumferential cutting line 33c, 33e, and 33b that is positioned, and the inner circumference that defines the heating regions HF1, HF2, and HF3 The width between the other circumferential cutting lines 33a, 33d, and 33e located on the side and the slits 35a, 35b, and 35c may be narrowed, and this portion may be used as the planar fuse function portion 32.

  Further, as shown in FIG. 9B, the slits 35a, 35b, and 35c cut the conductive layer 30 across the heat seal layer non-laminated portion 31a and divide the heating regions HF1, HF2, and HF3. Arc-shaped slits whose both ends are in contact with both the circumferential cutting lines 33a, 33d and 33e located on the outer circumferential side and the other circumferential cutting lines 33c, 33e and 33b located on the outer circumferential side, respectively. 35a, 35b, and 35c may be formed, and the narrow portion between the slits 35a, 35b, and 35c may be used as the planar fuse function portion 32.

That is, the fuse functional unit 32 cuts the conductive layer 30 across the heat seal layer non-laminated portion 31a, and forms at least one circumferential cutting line on the inner peripheral side or the outer peripheral side that partitions the heating regions HF1, HF2, and HF3. By forming slits 35a, 35b, and 35c that are in contact with both ends, a plane is formed between circumferential cutting lines 33a, 33d, and 33e on the inner circumferential side and circumferential cutting lines 33c, 33e, and 33b on the outer circumferential side. It should be.
Note that a general electromagnetic induction heating coil provided in a commercially available home electromagnetic cooker has an inner diameter of about 5 cm and an outer diameter of about 20 cm and a small heating coil diameter. In such a case, the eddy current is cut in the circumferential direction on the outer peripheral side. By flowing between the wires 33c, 33e, 33b and the slits 35a, 35b, 35c, the fuse function unit 32 operates more safely and damage to the container body 2 is prevented.
9 shows a modified example of the slit 35a by enlarging the portion surrounded by the chain line in FIG.

When the fuse function part 32 is broken, 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 is finished. Damage can be prevented. Furthermore, since the heating time can be controlled by the amount of the object to be heated, the 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 a heat seal layer non-laminate portion 31a, and the fuse function portion 32 is formed in the heat seal layer non-laminate portion 31a. The seal layer 31 is not damaged.

  By doing in this way, since the fuse function part 32 is formed in a flat shape without bending up the conductive layer 30, when cooking, as shown in FIG. When transported, damage to the fuse function unit 32 is prevented.

Further, in the present embodiment, both ends of the slits 35a, 35b, and 35c are straddled across the heat seal layer non-stacked portion 31a and are in contact with the circumferential cutting lines 33a, 33d, and 33e on the inner peripheral side on the heat seal layer 31. By forming, the conductive layer 30 is not cut off and dropped off. On the other hand, both ends of the slits 35a, 35b, and 35c do not straddle the heat seal layer non-laminate portion 31a, and the inner circumferential side circumferential cutting lines 33a, 33d, and 33e are within the heat seal layer non-laminate portion 31a. If formed so as to be in contact with each other, the conductive layer 30 is cut off by the slits 35a, 35b, and 35c and dropped 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, if the processing of the cutting waste does not become a problem at the time of manufacture, the slits 35a, 35b, and 35c do not straddle the heat seal layer non-laminate portion 31a as described above without straddling the heat seal layer non-laminated portion 31a. The fuse function portion 32 may be formed so as to be in contact with the circumferential cutting lines 33a, 33d, and 33e on the inner circumferential side in the laminated portion 31a and between the circumferential cutting lines 33c, 33e, and 33b on the other outer circumferential side. If it is formed, it is not limited to the said aspect.

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. Then, the induction heating heating element 3 is heat-sealed to the third support portion 22c provided so as to protrude to the outer peripheral side. In this way, the induction heating heating element 3 is attached to be separated 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. Is preferable. 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 It stays in the gap between the inner bottom surface 21 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 around the periphery of the opening of the container body 2 to support or fit the tray 4 on which the food to be steamed is placed. Can be combined.

  While the present invention has been described with reference to the preferred embodiment, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention.

For example, in the above-described embodiment, the fuse function unit 32 is provided in each of the heating areas HF1, HF2, and HF3 defined by the cutting lines 33a and 33b, the cutting lines 33c and 33d, and the cutting lines 33d and 33e of the main heating area HF. Although it is made to form, it is not limited to this.
When the main heating region HF is partitioned into a plurality of heating regions HF1, HF2, and HF3, a slit as described above is formed in at least one of the partitioned heating regions HF1, HF2, and HF3 to face each other. What is necessary is just to form the planar fuse function part 32 between the direction cutting lines.

  Further, the main heating region HF may be partitioned as one heating region according to the size and shape of the induction heating heating element 3. In other words, in the above-described embodiment, the circumferential 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 circumferential cutting line 33a on the inner circumferential side or the circumferential cutting line 33b on the outer circumferential side that defines the main heating region HF. A planar fuse function part 32 may be formed between the circumferential cutting line 33a on the circumferential side and the circumferential cutting line 33b on the outer circumferential side.

  Furthermore, in the embodiment described above, the induction heating heating element 3 is formed in a circular shape, and the heat seal layer non-laminate portion 31a is provided along the radial direction passing through the center of the induction heating heating element 3, The stacked portion 31a is not limited to this as long as it is provided so as to extend in a strip shape so as to intersect the main heating region HF.

In the above-described embodiment, 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 circumferential cutting lines 33f. Although the region CF is divided into sixteen, 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 circumferential cutting line 33f that divides the partial region CF in the radial direction may be omitted or increased or decreased.

  As described above, the present invention provides an induction heating container capable of heating 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 Fuse function part 33a-33e Cutting line 35a-35c Slit CF Central part area HF Main heating area HF1-3 Heating area OF Perimeter area

Claims (8)

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 plurality of circumferential cutting lines that cut the conductive layer along the circumferential direction are divided into a central region, one or more heating regions, and a peripheral region,
The heat seal layer non-laminated portion in which the heat seal layer is non-laminated is provided in a belt shape so as to intersect with the heating region,
In at least one of the heating zones,
Cutting the conductive layer in the heat seal layer non-laminated portion, forming a slit whose both ends are in contact with at least one circumferential cutting line on the inner peripheral side or outer peripheral side that partitions the heating region, An induction heating heating element characterized in that a planar fuse function part is formed between the circumferential cutting line on the inner circumferential side and the circumferential cutting line on the outer circumferential side.   The induction heating heating element according to claim 1, wherein a slit whose both ends are in contact with the circumferential cutting line on the inner peripheral side that defines the heating region is formed.   The induction heating heating element according to claim 1 or 2, 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 circumferential cutting line on the heat-seal layer. .   The induction heating heating element according to any one of claims 1 to 3, wherein the slit projects in a direction away from the circumferential cutting line with which both ends of the slit are in contact.   The induction heating heating element according to claim 4, wherein the slit is formed in an arc shape.   The induction heating according to any one of claims 1 to 5, 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 the center side toward the outer peripheral edge side. Heating element.   The induction heating heating element according to any one of claims 1 to 6, wherein the central region is partitioned into a plurality of regions by one or a plurality of circumferential cutting lines that cut the conductive layer along a circumferential direction. .   An induction heating container, wherein the induction heating heating element according to any one of claims 1 to 7 is attached to a container body made of a non-conductive material.

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