JP2005168648A - Container for induction heating cooking - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for induction heating cooking capable of uniformly heating contents in the container compared to conventional one by constituting so as to be able to allow a heat generating body formed in the side wall portion of the container to generate heat by electromagnetic induction. <P>SOLUTION: In the container for the induction heating cooking including the heat generator 2 generating heat by the electromagnetic induction, a container body 1 is formed in cylindrical shape with a bottom, the heat generator 2 comprises a bottom heat generator 21 disposed in the bottom 10 of the container body 1 and a side heat generator 22 with a ring shape formed in a side wall 11 of the container body 1, the side heat generator 22 is spaced apart from the bottom heat generating body 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an induction heating cooking container capable of heating contents by an induction heating cooker using induction heating.

  This type of induction heating cooking container is a bottomed cylindrical container having an upper surface opening, and includes a heating element that generates heat by electromagnetic induction. When the container is placed on the container mounting surface of the induction heating cooker and a current is passed through the induction heating coil of the cooker, a high-frequency magnetic field is generated and an eddy current is induced in the heating element. Generates heat due to resistance loss, thereby warming the contents placed in the container.

  However, the heating element of the induction heating cooking container is provided only at the bottom or continuously from the bottom to the cylindrical side wall. When the heating element is provided only at the bottom of the container, the contents in the container are heated only from the lower side by the heating element at the bottom. Further, even when the heating element is continuously provided from the bottom to the side wall, only the portion located at the bottom of the container is generating heat by electromagnetic induction in the entire heating element, and the side wall of the container The portion located in the portion is not heated and is heated only by heat conduction from the bottom portion, and therefore the contents in the container are again heated mainly from below. In any case, there is a problem that the contents in the container are heated with the lower side being deviated, and uneven heating tends to occur in the vertical direction.

  Therefore, the present invention has been made in view of the above-described conventional problems, and the heating element provided on the side wall of the container can be configured to generate heat by electromagnetic induction, so that the contents in the container can be made uniform compared to the conventional one. It is an object to provide a container for induction heating cooking that can be heated.

  As a result of repeated studies to solve the above problems, the present inventors have found that the heating element located on the side wall of the container is not provided continuously from the bottom to the side wall, but is discontinuous. The present invention has been completed with the knowledge that heat is generated by electromagnetic induction.

That is, the induction heating cooking container according to the present invention is an induction heating cooking container provided with a heating element that generates heat by electromagnetic induction, and the container main body is formed in a bottomed cylindrical shape. A bottom heating element located at the bottom of the container and a ring-shaped side heating element provided on the side wall of the container body, the side heating element being provided apart from the bottom heating element. And
The cylindrical container body includes a cylindrical container as well as a rectangular cylinder.

  In the induction heating cooking container having such a configuration, since the side heating element is separated from the bottom heating element, an eddy current is generated in the side heating element, and the side heating element generates heat together with the bottom heating element. To do. Therefore, the contents in the container are heated from below and simultaneously from the side.

  As described above, in the induction heating cooking container according to the present invention, the side heating element also generates heat, so that the contents in the container can be heated more uniformly than in the prior art.

Hereinafter, an embodiment of the container for induction heating cooking of the present invention will be described with reference to the drawings.
FIG. 1 shows an induction heating cooking container in the present embodiment. The container includes a bottomed cylindrical container body 1 and a heating element 2 provided in the container body 1.
The container body 1 has a deep bottom cylindrical shape, and has a substantially flat bottom portion 10, a side wall portion 11 having a diameter that tapers upward from the bottom portion 10, and a lateral side from the upper end portion of the side wall portion 11. It is comprised from the flange part 12 extended in this. The container body 1 is formed from a thermoplastic resin by injection molding or sheet molding. Examples of the thermoplastic resin include polypropylene, high-density polyethylene, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyamide, and polystyrene. Etc. In particular, polypropylene-based resins such as propylene-ethylene copolymers are light and have moderate mechanical strength, are relatively inexpensive and have good moldability, have moderate heat resistance and heat distortion temperatures, and are excellent overall. Therefore, it is preferable. However, the material of the container main body 11 is not limited to these, and other than the synthetic resin, for example, a non-conductive material such as paper or a composite of paper and synthetic resin can be used. Since it is light and incineration disposal is relatively easy, it is preferable as a disposable container. A label such as a cylindrical shrink label may be attached to the outside of the side wall portion 11.

  The heating element 2 is made of a conductive material, specifically a sheet-like material made of aluminum, but its surface is preferably coated with a heat-resistant resin such as polyethylene terephthalate. The thickness of the heating element 2 is, for example, 5 to 100 μm, preferably 10 to 30 μm. However, other examples of the conductive material include metal materials such as iron, stainless steel, chromium, and copper, and non-metallic materials such as carbon.

  In the present embodiment, the heating element 2 includes a disc-shaped bottom heating element 21 positioned at the bottom 10 of the container body 1 and a ring-shaped side heating element 22 positioned at the side wall 11 of the container body 1. Composed. The bottom heating element 21 has, for example, φ80 to φ120 (mm) and is fixed to the inner surface of the bottom 10 of the container body 1 by adhesion or the like, but is simply placed on the bottom 10 without being fixed, It is good also as a structure which provides an unevenness | corrugation in the bottom part 10 of the body 21 or the container main body 1, and forms a clearance gap between both. The side heating element 22 is fixed to the lower inner surface of the side wall portion 11 of the container body 1 by bonding or the like. The side heating element 22 has a belt shape with a predetermined width, and is located above the lower end of the side wall 11 by a predetermined distance. In other words, the side heating element 22 is arranged at a predetermined distance above the bottom heating element 21, and there is a region without the heating element 2 between them. The bottom heating element 21 and the side heating element 22 may be made of the same thickness and material, or may be different from each other.

  As described above, in the container according to the present embodiment, not only the bottom heating element 21 but also the side heating element 22 is provided on the inner surface of the side wall 11 of the container body 1 and the side heating element 22 is the bottom heating element. Since the container is placed on the placement surface of the induction heating cooker and a current is passed through the coil of the cooker, not only the bottom heating element 21 but also the side heating element 22 is separated. Eddy currents are also generated. Accordingly, not only the bottom heating element 21 but also the side heating element 22 itself generates heat, and the contents W placed in the container are heated not only from the bottom 10 but also from the side. Therefore, the content W is heated more uniformly than in the case of only the bottom heating element 21. Note that the distance from the mounting surface of the side heating element 22 is, for example, 10 to 30 mm.

In the present embodiment, the bottom heating element 21 is provided on the container body 1 over substantially the entire bottom 10 and the side heating element 22 is spaced upward from the bottom heating element 21. For example, as shown in FIG. The body 21 is made smaller than the bottom 10 of the container body 1, the side heating element 22 is arranged at the lowermost part of the side wall part 11, and a region without the heating element 2 is provided in the peripheral part of the bottom 10 of the container body 1. Also good. In any case, by providing a region without the heating element 2 between the bottom heating element 21 and the side heating element 22 over the entire circumference, the side heating element 22 itself can also generate heat.
Further, it is preferable that the container main body 1 has the tapered side wall portion 11 as described above and the side heating portion 22 is provided on the tapered side wall portion 11 so that heat is easily generated. This is considered that the direction which provided in the taper-shaped side wall part 11 is easy to receive the magnetic field from a mounting surface.

  Further, although the side heating element 22 is provided in one stage, a plurality of stages may be provided in the vertical direction. In this case, the plurality of side heating elements 22 are also in a positional relationship that is separated from each other.

  Furthermore, the shape of the container main body 1 can be changed as appropriate, and may be a rectangular tube shape or a shallow type.

  In addition to putting the contents W in the container during cooking, the contents W may be put in the container in advance and the container sealed with a lid.

  A circular heating element (bottom heating element) having a diameter of 90 mm made of aluminum foil having a thickness of 20 μm is placed on the bottom of a polypropylene cup-shaped container (container body) having a bottom diameter of 100 mm and an inner diameter of 130 mm at the upper opening, and is cup-shaped. A container in which a belt-like sheet (side heating element) having a width of 20 mm made of an aluminum foil having a thickness of 20 μm was fixed at a position 20 mm above the bottom surface of the inner peripheral surface of the side wall of the container. When 600 ml of water is placed in this container and placed in an IH cooker (model name: KZ-PH1-W manufactured by Matsushita Electric Industrial Co., Ltd.) and heated, water vapor (bubbles) is generated not only from the bottom but also from the belt-like sheet. It was confirmed that heat was generated from the side portion.

Sectional drawing which shows the container for induction heating cooking which concerns on one Embodiment of this invention. The principal part sectional drawing of the container for induction heating cooking in other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Container main body, 2 ... Heat generating body, 10 ... Bottom part, 11 ... Side wall part, 12 ... Flange part, 21 ... Bottom heat generating body, 22 ... Side part heating element, W ... Contents

Claims (1)

  An induction heating cooking container provided with a heating element that generates heat by electromagnetic induction, wherein the container body is formed in a bottomed cylindrical shape, and as the heating element, a bottom heating element located at the bottom of the container body, and a container body An induction heating cooking container, comprising: a ring-shaped side heating element provided on a side wall, wherein the side heating element is provided apart from the bottom heating element.