JP2004329748A - Vessel for induction cooking - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vessel for induction cooking by which radiation efficiency is raised in a heat generating body, so as to prevent heat damage in the heat generating body, by suppressing the accumulation of air bubbles of steam in layers on the front surface of the heat generating body. <P>SOLUTION: Protruded lines 20 are formed on the inner surface of a bottom part 4 in a vessel body consisting of a non-conductive material. Thus, air bubble discharge passages 21 from the substantially center part of the heat generating body 2 to the peripheral part are formed between the planar heat generating body 2 heated by electromagnetic induction and the inner surface of the bottom part 4 of the vessel body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an induction heating cooking container that can heat contents using an induction heating cooker that utilizes induction heating.
[0002]
[Prior art]
This type of induction heating cooking container includes a heating element that generates heat by electromagnetic induction.When the container is mounted on the container mounting surface of the induction heating cooker and an electric current is applied to the induction heating coil of the cooking device, An eddy current is induced in the heating element by generating a high-frequency magnetic field, and the heating element generates heat due to resistance loss due to the eddy current, thereby heating the contents.
[0003]
[Problems to be solved by the invention]
By the way, recently, a simple container in which a container body is made of a non-conductive material such as plastic or paper and a heating element is fixed to an outer surface or an inner surface of a bottom thereof or a heating element is built in a bottom portion is also available. Proposed. However, in the case of these containers in which the heating element is integrally formed with the container body, the heating of the heating element may damage the container body. We have been conducting continuous research and development on induction heating cooker containers with heating elements. The heating element formed separately from the container body is substantially flat, and the bottom inner surface of the container body is also substantially flat, so that when the heating element is put into the container body, the heating element is placed on the bottom inner surface of the container body. Will be placed without leaving any gaps.
[0004]
In this state, for example, water is put into the container body, and the heating element is heated by the induction heating cooker. When the content is cooked by the heating, steam is generated as bubbles on the surface. However, since there is almost no gap between the lower surface of the heating element and the inner surface of the bottom of the container body, air bubbles generated on the lower surface are likely to adhere and stay without being separated from the heating element. As a result, water vapor accumulates in a layer on the lower surface of the heating element, which may cover the lower surface. In the induction heating cooking, the heating element itself generates heat, and the heat is radiated to the contents to perform the heating cooking. However, when the lower surface of the heating element is covered with a layer of water vapor, it acts as a heat insulating layer, which hinders the heat radiation of the heating element and lowers the heating efficiency, and also causes the heating element to be thermally damaged by its own heat storage. Also.
[0005]
Further, in order to vertically separate the heating element and the solid content, a mesh body is provided as a partition wall above the bottom inner surface of the container body, and a heating element is provided between the mesh body and the bottom inner surface of the container body. We are also developing containers that can be positioned. As solid contents, there are dry foods such as dried noodles, and water is poured into a container body during heating and cooking, and the water is heated by a heating element. In this container, air bubbles generated on the upper surface of the heating element pass through the eyes (openings) of the mesh body and are discharged upward. However, when the number of air bubbles increases, air bubbles accumulate below the mesh body. A layer of water vapor may form. When a layer of water vapor is formed below the mesh body in this way, the layer gradually covers the upper surface of the heating element, thereby preventing heat radiation from the upper surface of the heating element and causing the above-described problem. Cause. In addition, since the heating element is pressed against the inner surface of the bottom of the container body by the formed layer of water vapor, it is difficult for bubbles generated on the lower surface of the heating element to escape upward, and heat damage to the inner surface of the bottom of the container body also occurs. Is also a concern.
[0006]
On the other hand, the present inventors have developed a resin-coated aluminum heating element in which a heating element body made of an aluminum sheet is coated with a synthetic resin for the purpose of improving the handleability of the heating element and preventing breakage during the development process. The aluminum sheet having a thickness of, for example, 5 to 30 μm is excellent in heat generation efficiency, and is therefore economical in that it is lightweight, easy to manufacture, and can reduce the cost. On the other hand, the aluminum sheet is thin and is easily damaged by heat. In addition, since the covering resin is interposed between the aluminum sheet and the contents, the heat radiation surface is slightly inferior to that without the resin coating. . Therefore, when such a resin-coated aluminum heating element is used, the risk of thermal damage to the resin coating and the aluminum sheet due to the above-described layered water vapor adhering to the heating element surface is further increased. is there.
[0007]
The present invention has been made in view of the above-described conventional problems, and suppresses the accumulation of water vapor bubbles in a layer on the surface of a heating element, thereby increasing the heat radiation efficiency of the heating element and preventing thermal damage to the heating element. An object of the present invention is to provide a container for induction heating cooking that can be performed.
[0008]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, and a container for induction heating and cooking according to the present invention has a container body made of a non-conductive material and a container body placed on the bottom inner surface of the container body. In an induction heating cooking container provided with a flat heating element that is placed in the container body and generates heat by electromagnetic induction, between the heating element and the bottom inner surface of the container body, a substantially central portion to a peripheral portion of the heating element are provided. It is characterized in that a bubble discharge passage reaching up to is formed.
[0009]
A convex ridge extending from the substantially central portion toward the peripheral portion is formed on the inner surface of the bottom of the container body, and a gap is formed between a region where the convex ridge is not formed on the inner surface of the bottom of the container main body and the lower surface of the heating element. And a convex portion extending from a substantially central portion toward a peripheral portion is formed on a lower surface of the heating element, and a region where the convex portion is not formed on the lower surface of the heating element and a container. The one in which the bubble discharge passage is formed by a gap between the bottom inner surface of the main body and at least one of the bottom inner surface of the container main body and the lower surface of the heating element extends from the substantially central portion toward the peripheral portion. In some cases, an elongated recess is formed, and the recess forms the bubble discharge passage.
[0010]
Since the bubble discharge passage extending from the substantially central portion to the peripheral portion of the heating element is formed between the heating element and the inner surface of the bottom of the container body, when a liquid such as water is put into the container body and heated. The water vapor bubbles generated on the lower surface of the heating element reach the peripheral edge of the heating element through the bubble discharge passage, and are discharged upward from a gap between the peripheral edge of the heating element and the inner surface of the body of the container body. Is done.
[0011]
Further, the induction heating cooking container according to the present invention has a container main body made of a non-conductive material, and a plate-shaped container which is put in the container main body so as to be placed on the inner bottom surface of the container main body and generates heat by electromagnetic induction. In the induction heating cooking container provided with the heating element, a through hole is formed at a substantially central portion of the heating element, and the heating element is formed so as to be higher from a peripheral edge thereof toward the through hole. It is characterized by having.
[0012]
In the container, since the heating element is formed so as to rise from the peripheral edge toward the through hole at the substantially central portion, the bubbles of water vapor generated on the lower surface by the heat generation of the heating element are substantially at the central portion. Smoothly move toward the through hole and is discharged upward from the through hole.
[0013]
Further, the induction heating cooking container according to the present invention has a container main body made of a non-conductive material, and a plate-shaped container which is put in the container main body so as to be placed on the inner bottom surface of the container main body and generates heat by electromagnetic induction. In the induction heating cooking container provided with the heating element, the heating element has a substantially flat mounting portion to be mounted on the inner surface of the bottom of the container body at a substantially central portion thereof, and a peripheral edge from the mounting portion. It is characterized in that it is formed so as to be higher toward the part.
[0014]
In the container, since the heating element is formed so as to be higher from the substantially flat mounting portion toward the peripheral portion, bubbles of water vapor generated on the lower surface due to heat generation of the heating element are generated at the peripheral portion. , And is discharged upward through a gap between the peripheral portion of the heating element and the inner surface of the body of the container body.
[0015]
Further, the induction heating cooking container according to the present invention has a container main body made of a non-conductive material, and a plate-shaped container which is put in the container main body so as to be placed on the inner bottom surface of the container main body and generates heat by electromagnetic induction. In the induction heating cooking container provided with the heating element, the heating element is configured to be swingable around a substantially central portion thereof as a fulcrum.
[0016]
In the container, the heating element swings due to the rising motion of the generated water vapor bubbles. When the heating element swings, the air bubbles adhering to the surface of the heating element are smoothly separated from the heating element.
[0017]
Further, the induction heating cooking container according to the present invention has a container main body made of a non-conductive material, and a flat plate that is placed in the container main body so as to be placed on the bottom inner surface of the container main body and generates heat by electromagnetic induction. In the induction heating cooking container provided with a heating element, a partition wall for vertically partitioning a housing portion of the container body is provided, and the heating element is located between the partition wall and a bottom inner surface of the container body. The wall is formed in a lower surface concave shape having a predetermined portion as a top, and upper and lower through holes are formed in the top.
[0018]
In this container, the housing part of the container body is vertically divided by the partition wall, and for example, solid contents are put above the partition wall. And since this partition wall is formed in the lower surface concave shape which has a predetermined part as a top, a clearance corresponding to the lower surface shape of a partition wall is formed between a partition wall and a heating element. Therefore, the flat heating element is prevented from sticking to the lower surface of the partition wall, and even if bubbles of water vapor generated on the upper surface of the heating element accumulate in a layer on the lower surface of the partition wall, the water vapor layer generates heat. It is separated from the upper surface of the body. Moreover, the bubbles move to the top along the lower surface of the partition wall and are discharged upward from the through holes formed at the top, so that even if a water vapor layer is formed, the upper surface of the heating element is thereby reduced. Covering is prevented.
[0019]
When the partition wall is provided in this manner, it is preferable that the partition wall be formed of a mesh-like body, so that the bubbles can be easily discharged upward from a large number of openings (a large number of through holes). When the partition wall is made of a mesh, the through hole formed at the top is preferably larger than the opening of the mesh. That is, even when the bubbles are generated violently, the bubbles are smoothly discharged from the large through hole at the top.
[0020]
Further, the induction heating cooking container according to the present invention has a container main body made of a non-conductive material, and a flat plate that is placed in the container main body so as to be placed on the bottom inner surface of the container main body and generates heat by electromagnetic induction. In the induction heating cooking container provided with a heating element, a partition wall for vertically partitioning the housing portion of the container body is provided, the partition wall has upper and lower through holes, and the lower surface of the partition wall is substantially flat. A heating element is provided between the partition wall and the bottom inner surface of the container body, and a heating element separating means for separating the heating element from the partition wall by a predetermined distance downward is provided.
[0021]
Although the container has a heating element separating means for separating the heating element downward from the partition wall by a predetermined distance although the lower surface of the partition wall is substantially flat, a layer of water vapor is temporarily formed on the lower surface of the partition wall. Even if it does, the upper surface of the heating element is prevented from being covered.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an induction heating cooking container according to the present invention will be described with reference to FIGS. 1 to 4 and a bottomed cylindrical container body 1 having an upper surface opening and a thin-walled substantially flat heating element that generates heat by electromagnetic induction. 2 will be described.
[0023]
The container main body 1 includes a body 3 whose diameter is increased in a substantially tapered shape upward, a flat bottom 4 formed integrally with the body 3, and an upper end of the body 3 around the entire circumference. And a flange portion 5 formed over the same.
[0024]
Up and down ribs 6 are formed radially on the outer peripheral surface of the body 3, and the flange 5 is formed in a substantially U-shape in cross section. The body 3 is formed such that an upper body 3a and a lower body 3b are connected in a stepwise manner via a horizontal annular connecting part 7, and an auxiliary piece 8 is provided at a lower end of the upper body 3a. It extends downward so as to have a predetermined gap with the body 3b. An annular locking projection 9 is formed on the inner peripheral surface of the lower trunk 3b at a position above the bottom 4 by a predetermined height. The locking projection 9 functions as a restricting means for restricting the heating element 2 from rising. Therefore, the locking projection 9 need not be annular.
[0025]
In addition, on the inner surface of the bottom, a ridge 20 extending from the substantially central part toward the peripheral part is formed. A plurality of the ridges 20 are radially arranged so that the heating element 2 is placed thereon. In the present embodiment, the ridges 20 extending linearly in the radial direction are arranged at approximately 90 degrees. There are a total of four protruding. The height of the plurality of ridges 20 is substantially constant. Each of the ridges 20 is formed such that its inner ends are separated from each other, and their outer ends are also separated without reaching the inner surface of the trunk. When the heating element 2 is placed on the ridge 20, a fan-shaped bubble discharge passage 21 extending from a substantially central portion to a peripheral portion of the heating element 2 is provided between two adjacent ridges 20. It is formed.
[0026]
The container body 1 having the above configuration is formed by injection molding from a thermoplastic resin. Examples of the thermoplastic resin include polypropylene, high-density polyethylene, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyamide, and polystyrene. is there. In particular, polypropylene-based resins such as propylene-ethylene copolymers are light, have moderate mechanical strength, are relatively inexpensive, have good moldability, have moderate heat resistance and heat deformation temperatures, and are generally excellent. Therefore, it is preferable. However, the material of the container body 1 is not limited to these, and other than synthetic resin, for example, a non-conductive material such as paper can be used. In particular, if it is formed of synthetic resin or paper, it is light and can be incinerated. Because it is relatively easy, it is preferable as a disposable container. Further, a label such as a cylindrical shrink label may be attached to the outside of the body 3.
[0027]
The heating element 2 is accommodated in the container body 1 so as to be placed on the inner surface of the bottom of the container body 1. The heating element 2 is formed to have a smaller diameter than the inner surface of the body. Therefore, when the heating element 2 is placed in the container body 1, an annular gap is formed between the peripheral portion of the heating element 2 and the inner surface of the body.
[0028]
The heating element 2 is of a resin coating type in which a sheet-like heating element main body 60 made of a conductive material is covered with a coating portion 61 made of a synthetic resin as shown in FIG.
The conductive material is, for example, a metal material such as iron, stainless steel, chromium, aluminum, or copper, or a nonmetallic material such as carbon, and is preferably aluminum, stainless steel, copper, or iron, and particularly preferably aluminum. The thickness of the heating element main body 60 is, for example, 7 to 100 μm, preferably 15 to 30 μm in the case of an aluminum sheet.
[0029]
The covering portion 61 is preferably made of a heat-resistant resin sheet such as polybutylene terephthalate, polyethylene terephthalate, or polyamide, and covers at least the entire upper surface and lower surface of the heating element main body 60. It is preferably 0.5 mm or less on one side, particularly about 0.01 to 0.2 mm on one side. In this manner, by covering the heating element main body 60 with the covering portion 61, the heating element main body 60 is protected, and the warpage of the heating element main body 60 due to a temperature rise or the like is suppressed. Further, by covering the thin heating element main body 60 with the covering portion 61, the overall thickness is increased as compared with the configuration of the heating element main body 60 alone, so that good handleability is obtained.
[0030]
As shown in FIG. 3, the heating element 2 has a round through-hole 10 formed substantially at the center, and is formed as a whole in a loop shape (a donut shape, a disc shape with an empty through-hole 10) in plan view. . Specifically, the shape and the size are set so that the loop-shaped heating element 2 can overlap the region between the inner circumference and the outer circumference of the induction coil of the cooker. For example, the heating element main body 60 has an inner diameter of φ40 (mm) and an outer diameter of φ130 (mm).
In this manner, the through hole 10 penetrating up and down is formed substantially at the center of the heating element 2, and the bubble discharge passage 21 communicates the through hole 10 with the peripheral edge of the heating element 2. It is formed in the radial direction.
[0031]
When, for example, water is put into the container configured as described above and placed on a cooker and heated, as shown in FIG. 3, the heat generated by the heating element 2 generates a bubble a of water vapor on the surface thereof. Bubbles a generated on the upper surface 2a of the heating element 2 are sequentially lifted away from the heating element 2. On the other hand, air bubbles a generated on the lower surface 2b of the heating element 2 pass through a bubble discharge passage 21 formed between the inner surface of the bottom of the container body 1 and the lower surface 2b of the heating element 2 so as to be substantially at the center of the heating element 2. The air is discharged upward from the through hole 10 of the portion and from the annular gap between the peripheral portion of the heating element 2 and the inner surface of the body. Therefore, it is possible to prevent the bubbles a generated on the lower surface 2b of the heating element 2 from staying on the lower surface 2b of the heating element 2 and accumulating in a layer. Therefore, the heat radiation of the heating element 2 is not hindered because the layer of water vapor formed by the accumulation of the bubbles a in a layer form adheres to the lower surface 2b of the heating element 2 as a heat insulating layer. The heat is smoothly radiated to the water, and the heat generating element 2 is prevented from being damaged by heat. Moreover, since the heat radiation efficiency of the heating element 2 is good, the heating efficiency of water is also increased. In particular, in this embodiment, since the through hole 10 penetrating vertically is formed substantially at the center of the heating element 2, the bubbles a are discharged upward from the through hole 10. However, the configuration may be such that the heating element 2 does not have the through-hole 10 by covering and covering the through-hole formed in the heating element main body 60 with the covering portion 61.
Also, the ridge 20 may be gradually lowered or gradually raised from the outer end to the inner end, and the contact area with the lower surface 2b of the heating element 2 decreases, so that the bubble a Emission efficiency is further improved.
Further, the protrusions 20 may be not only continuous in the radial direction but also discontinuous. In addition to the shape of the ridge 20, the layout and the number of the ridges 20 can be appropriately changed in design.
[0032]
Further, in the present embodiment, the ridge 20 is formed on the inner surface of the bottom, but a ridge may be formed. In this case, the ridge itself formed on the inner surface of the bottom serves as a bubble discharge passage.
[0033]
Alternatively, a convex or concave ridge may be formed on the lower surface 2b of the heating element 2 to form a bubble discharge passage between the heating element 2 and the bottom inner surface. For example, as shown in FIG. 5, in the case of a flat heating element 2 having a through hole 10 at a substantially central portion, a rib 22 extending linearly in the radial direction is pressed from the through hole 10 to the peripheral edge. And the like. That is, a convex stripe is formed on the upper surface 2a of the heating element 2 and a concave stripe is formed on the lower surface 2b correspondingly. Therefore, when the heating element 2 is used, the concave streak on the lower surface 2b serves as a bubble discharge passage, and when used upside down, a fan-shaped bubble discharge passage is formed between the convex streaks on the lower surface 2b as in the case of FIG. You. In addition, a concave stripe may be formed on both the bottom inner surface of the container body 1 and the lower surface 2b of the heating element 2.
[0034]
Further, the plate-shaped heating element 2 having the through hole 10 formed at the substantially central portion may be formed so as to be gradually higher from the peripheral edge toward the through hole 10. For example, as shown in FIG. 6, the heating element 2 is formed into an inverted mortar shape so that the height of the heating element 2 gradually increases in a tapered shape from the peripheral portion toward the through hole 10 substantially in the center. As a result, the bubbles a generated on the lower surface 2b of the heating element 2 are gathered along the lower surface 2b of the tapered heating element 2 into the through hole 10 in the substantially central portion, and are discharged upward from the through hole 10. Therefore, accumulation of bubbles a on the lower surface 2b of the heating element 2 is prevented.
[0035]
Alternatively, the shape of the heating element 2 may be increased toward the periphery as shown in FIG. That is, the heating element 2 has a substantially flat mounting portion 23 at a substantially central portion thereof, and is mounted on the inner surface of the bottom of the container body 1 by the mounting portion 23. The height gradually increases in a tapered shape from the mounting portion 23 toward the peripheral portion. In other words, the heating element 2 has a mortar shape, whereby the bubbles a on the lower surface 2b of the heating element 2 move to the peripheral edge along the inclined lower surface 2b of the heating element 2, and The liquid is discharged upward from a gap between the container body 1 and the inner surface of the body. Although the heating element 2 shown in FIG. 7 does not have the through-hole 10 formed in the substantially central portion thereof, the through-hole 10 may be provided.
[0036]
Further, the heating element 2 shown in FIGS. 6 and 7 has a configuration in which the height increases in a tapered shape toward a substantially central portion or a peripheral portion, but the configuration changes in a multi-stepped manner. In any case, the height may be gradually increased toward the substantially central portion or the peripheral portion.
[0037]
By the way, as described above, in the container body 1, in order to separate solid contents such as dried food such as dried noodles and the like put in the container body 1 from the heating element 2, In some cases, a partition wall 30 for vertically partitioning the storage section is provided. In the case of the container shown in FIG. 8, the partition wall 30 is formed not in a flat plate shape but in a concave shape on a lower surface having a predetermined portion as a top 31. I have. Specifically, it is formed in a dome shape (concave curved surface) having a top 31 at a substantially central portion. A large number of upper and lower through holes 32 are formed in the partition wall 30, and are formed of, for example, a net. In the partition wall 30 shown in FIG. 8, a through-hole 33 larger than a large number of upper and lower through-holes 32 (openings in the case of a net-like body) is formed at the top 31.
[0038]
In such a container, the flat heating element 2 is located below the partition wall 30, but bubbles a generated on the upper surface 2 a of the heating element 2 are separated upward from the heating element 2 without staying there. I will do it. That is, by forming the partition wall 30 in a concave shape on the lower surface, the heating element 2 does not adhere to the partition wall 30, and a gap corresponding to the lower surface shape of the partition wall 30 is formed between the heating element 2 and the partition wall 30. Thus, it is possible to prevent the air bubbles a from being accumulated on the upper surface 2a of the heating element 2 while being attached. When the air bubbles a that have separated upward from the upper surface 2a of the heating element 2 reach the lower surface of the partition wall 30, they are normally discharged upward through a large number of upper and lower through holes 32. On the lower surface of the partition wall 30, the bubbles a may be accumulated in a layer. However, even if the air bubbles a are accumulated in a layer as described above, since the partition wall 30 is formed in a concave shape on the lower surface, the layer air bubbles a gradually move toward the top 31 at the substantially central portion of the partition wall 30. Is reliably discharged from the large upper and lower through holes 33 formed in the top portion 31. Therefore, heat radiation on the upper surface 2a of the heating element 2 is not hindered.
[0039]
When the partition wall 30 has the through-hole 33 at the top 31, there may be no need to have many other upper and lower through-holes 32. Conversely, when the partition wall 30 is formed of a mesh body having a large number of upper and lower through holes 32, the large through holes 33 at the top 31 may be omitted.
[0040]
Also, as shown in FIG. 9, a notch 34 is formed in the peripheral portion of the partition wall 30 to form an upper and lower through hole between the partition wall 30 and the inner surface of the trunk. The bubble a may be discharged upward also from the through hole. In the case of FIG. 9, the partition wall 30 has the through-hole 33 only at the top 31, but as described above, it is needless to say that the partition wall 30 may be formed of a mesh having a large number of through-holes 32 or the like. .
[0041]
Further, when the heating element 2 is formed in a flat plate shape and the lower surface of the partition wall 30 is also substantially flat, it is preferable to provide a heating element separating means for separating the heating element 2 from the partition wall 30 by a predetermined distance below. For example, as shown in FIG. 10, a projection 40 projecting downward is formed on the lower surface of the partition wall 30 as a heating element separating unit. The heating element 2 is separated downward from the partition wall 30 by the height of the projection 40, and the close contact between the two is prevented. Therefore, even when the bubbles a generated on the upper surface 2a of the heating element 2 accumulate in a layer, the air bubbles a accumulated in the layer do not adhere to and stay on the upper surface 2a of the heating element 2 but are separated upward therefrom. Bubbles a are discharged upward through a large number of through holes 32 formed on the lower surface of the partitioned wall 30 formed in the partitioned wall 30. Therefore, the heat radiation efficiency of the heating element 2 is enhanced, and damage of the heating element 2 due to heat is prevented.
[0042]
Note that a protrusion may be formed on the upper surface 2a of the heating element 2 as the heating element separating means. Further, as shown in FIG. 11, the above-described locking projections 9 are formed on the inner surface of the body as heating element separating means, and the raising of the heating element 2 is regulated by the locking projections 40, so that the heating element 2 is formed. It may be separated from the partition wall 30 by a predetermined distance downward.
[0043]
Further, the heating element 2 may be configured to swing about its substantially central portion as a fulcrum. For example, as shown in FIG. 12, a pivot projection 50 is formed substantially at the center of the lower surface of the flat heating element 2, and a pivot projection 51 is formed substantially at the center of the lower surface of the partition wall 30. The projection 40 allows the heating element 2 to be pivotally supported by the partition wall 30 and the inner surface of the bottom. When water is put into such a container and heated, the heating element 2 swings up and down around a horizontal state due to the upward movement of bubbles a generated on the surface of the heating element 2, particularly on the lower surface 2 b. Due to such a swinging operation of the heating element 2, the bubbles a attached to the surface of the heating element 2 are quickly separated.
[0044]
Note that pivot projections may be formed on both upper and lower surfaces of the heating element 2, or conversely, pivot projections may be formed on the inner surface of the bottom and the partition wall 30. Further, the heating element 2 itself may be formed in, for example, a mortar shape, and a substantially central portion of a lower surface thereof may be sharpened so that the heating element 2 can swing. Can be variously changed.
Further, the heating element 2 may be configured to be swingable without providing the partition wall 30. In this case, the heating element 2 or the projection on the bottom inner surface pivotally supports the heating element 2. However, if the heating element 2 is configured to be swingable when the partition wall 30 is provided, the bubble a hardly accumulates on the lower surface of the partition wall 30 due to the swinging operation of the heating element 2, and even if the heating element 2 accumulates, the bubbles a This is preferable because the bubbles a are easily discharged from the through holes 32 of the partition wall 30 by the operation.
[0045]
In the above embodiment, since the container body 1 has a cylindrical shape, the heating element 2 has a disk shape correspondingly. However, the heating element 2 may have a polygonal shape without conforming to the shape of the container body 1. Further, the container body 1 may be not only cylindrical but also rectangular.
[0046]
Further, it is preferable that the heating element includes a heating element main body made of an aluminum sheet and a covering portion made of a synthetic resin that covers the heating element main body. The heating element body is made of aluminum sheet, which is economical. In addition, by covering the thin aluminum sheet with the coating, the heating element body is protected and its durability is improved. Also improve. On the other hand, there is a concern about the heat radiating surface of the aluminum sheet due to the presence of the covering portion. However, by using the various solutions described above, the heat radiating efficiency of the heating element is increased, so that damage due to the heat is effectively prevented. can do.
[0047]
【The invention's effect】
As described above, when a liquid such as water is put into the container according to the present invention and heated, bubbles of water vapor generated on the surface of the heating element efficiently separate from the heating element, so that the bubbles are layered on the surface of the heating element. Without accumulation, it is possible to prevent heat-induced damage of the heating element caused by the accumulation.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an induction heating cooking container according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the container.
FIG. 3 is a sectional view of a main part showing a use state of the container.
FIG. 4 is a partial cross-sectional view of a heating element used in the container.
FIG. 5 is a perspective view showing a heating element of an induction heating cooking container according to another embodiment.
FIG. 6 is an essential part cross-sectional view showing a use state of an induction heating cooking container in another embodiment.
FIG. 7 is an essential part cross-sectional view showing a use state of an induction heating cooking container in another embodiment.
FIG. 8 is a sectional view of a main part showing a use state of a container for induction heating cooking according to another embodiment.
FIG. 9 is a plan view showing a container for induction heating cooking according to another embodiment.
FIG. 10 is a cross-sectional view of a main part showing a use state of an induction heating cooking container in another embodiment.
FIG. 11 is a cross-sectional view of a main part showing a use state of an induction heating cooking container in another embodiment.
FIG. 12 is an essential part cross-sectional view showing a use state of an induction heating cooking container in another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Container main body, 2 ... Heating element, 3 ... Body part, 4 ... Bottom part, 9 ... Locking projection (regulator means, Heating element separation means), 10, 31, 32 ... Through hole, 20 ... Convex stripe, 21 ... Bubble discharge passage, 22 ... Rib (ridge), 23 ... Placement section, 30 ... Partition wall, 34 ... Notch, a ... Bubble, 40 ... Protrusion (heating element separating means), 50, 51 ... Pivot projection, 60: heating element body, 61: coating

Claims (10)

An induction heating cooking container including a container body made of a non-conductive material and a flat heating element that is placed in the container body so as to be placed on the inner surface of the bottom of the container body and generates heat by electromagnetic induction. ,
An induction heating cooking container characterized in that a bubble discharge passage extending from a substantially central portion to a peripheral portion of the heating element is formed between the heating element and an inner bottom surface of the container body. On the inner surface of the bottom of the container body, a ridge extending from the substantially central portion toward the peripheral portion is formed, and the gap between the region where the ridge is not formed on the inner surface of the bottom of the container body and the lower surface of the heating element is formed. 2. The induction heating cooking container according to claim 1, wherein a bubble discharge passage is formed. On the lower surface of the heating element, a ridge extending substantially from the center to the peripheral portion is formed, and the air bubbles are formed by a gap between a region of the lower surface of the heating element where the ridge is not formed and the inner surface of the bottom of the container body. The induction heating cooking container according to claim 1, wherein a discharge passage is configured. 2. A bubble strip extending from a substantially central portion toward a peripheral edge is formed on at least one of an inner surface of a bottom portion of the container body and a lower surface of the heating element, and the recess forms the bubble discharge passage. For induction heating cooking. An induction heating cooking container comprising: a container body made of a non-conductive material; and a plate-shaped heating element that is placed in the container body so as to be placed on the inner surface of the bottom of the container body and generates heat by electromagnetic induction. ,
A container for induction heating cooking, wherein a through hole is formed at a substantially central portion of the heating element, and the heating element is formed so as to increase in height from a peripheral portion thereof toward the through hole. An induction heating cooking container comprising: a container body made of a non-conductive material; and a plate-shaped heating element that is placed in the container body so as to be placed on the inner surface of the bottom of the container body and generates heat by electromagnetic induction. ,
The heating element has a substantially flat mounting portion to be mounted on the inner surface of the bottom of the container body at a substantially central portion thereof, and is formed so as to be higher from the mounting portion toward the peripheral portion. Characteristic induction heating cooking container. An induction heating cooking container comprising: a container body made of a non-conductive material; and a plate-shaped heating element that is placed in the container body so as to be placed on the inner surface of the bottom of the container body and generates heat by electromagnetic induction. ,
A container for induction heating cooking, wherein the heating element is configured to be swingable about a substantially central portion thereof as a fulcrum. An induction heating cooking container including a container body made of a non-conductive material and a flat heating element that is placed in the container body so as to be placed on the inner surface of the bottom of the container body and generates heat by electromagnetic induction. ,
A partition wall for vertically partitioning the housing portion of the container body is provided, and a heating element is located between the partition wall and a bottom inner surface of the container body, and the partition wall is formed in a lower surface concave shape having a predetermined portion as a top. An induction heating cooking container, wherein upper and lower through holes are formed in the top. 9. The induction heating cooking container according to claim 8, wherein the partition wall is formed of a mesh, and a through hole larger than an opening of the mesh is formed at the top. An induction heating cooking container including a container body made of a non-conductive material and a flat heating element that is placed in the container body so as to be placed on the inner surface of the bottom of the container body and generates heat by electromagnetic induction. ,
A partition wall for vertically partitioning the housing portion of the container body is provided, the partition wall has upper and lower through holes, the lower surface of the partition wall is substantially flat, and a space between the partition wall and the bottom inner surface of the container body is provided. Wherein the heating element is disposed at a predetermined distance from the partition wall, and the heating element is separated from the partition wall by a predetermined distance.

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