JP2003052536A - Cooker container for induction heating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooker container for induction heating simple in structure, easy in manufacturing and low in cost. SOLUTION: The container comprises a bottomed cylindrical container body made of an electrically nonconductive material and a lid body for closing the upper opening of the container body. The container further comprises an electromagnetic induction heater on the lid body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating cooking container capable of heating contents by an induction heating cooker utilizing induction heating.

[0002]

2. Description of the Related Art A container for induction heating and cooking of this kind is provided with a heating element that generates heat by electromagnetic induction. When the container is placed on an induction heating cooker and an electric current is passed through an induction heating coil of the cooker, A high frequency magnetic field is generated to induce an eddy current in the heating element, and the heating element generates heat due to resistance loss due to the eddy current, thereby warming the contents.

[0003]

By the way, recently,
It has also been proposed that the container body is made of a non-conductive material such as plastic or paper, and a flat heating element is fixed to the outer surface or the inner surface of the bottom portion, or a heating element is built in the bottom portion. However, with the structure in which the heating element is provided on the bottom of the container body, the manufacturing thereof is complicated, and it is difficult to manufacture the container at low cost.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide an easy-to-manufacture and low-cost induction heating cooking container capable of heating and cooking with a simple structure.

[0005]

The present invention has been made to solve the above problems, and an induction heating cooking container according to the present invention comprises a bottomed cylindrical container body made of a non-conductive material. A lid body for closing the upper opening of the container body,
The lid is provided with a heating element that generates heat by electromagnetic induction.

In this structure, the container is placed upside down and placed on the induction heating cooker so that the side of the lid having the heating element faces downward, and the container is heated.

Particularly, it is preferable that the bottom of the container body is provided with a pressure relief means for releasing the pressure in the container body to the outside during heating and cooking.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An induction heating cooking container according to an embodiment of the present invention will now be described with reference to FIGS. 1 and 2 while an object W containing a liquid is housed inside. The container will be described. The food W to be cooked is, for example, a drink such as coffee or a liquid such as soup, stew or curry, and can contain liquid and can be induction-heated.

In FIG. 1, the container is composed of a bottomed cylindrical container body 1 having an upper opening, and a circular seal lid 2 for closing the upper opening of the container body 1. The container body 1 has a body portion 3 that expands upward in a substantially tapered shape.
And a substantially flat plate-shaped bottom portion 4 formed integrally with the body portion 3, and a flange portion 5 formed on the upper end portion of the body portion 3 over the entire circumference. Vertical ribs 6 are formed radially on the outer peripheral surface of the body portion 3, and the flange portion 5 is formed in a substantially U shape in cross section. Further, the body 3 is formed such that the upper body 3a and the lower body 3b are continuous in a stepwise manner via a horizontal annular connecting portion 7, and an auxiliary piece 8 is provided at the lower end of the upper body 3a. It extends downward so as to have a predetermined gap with the body portion 3b.

Further, the check valve 1 is provided on the bottom portion 4 at a substantially central position.
0 is provided. The check valve 10 has a sphere 12 which closes a hole 11 which opens in the bottom 4 in a normal state as shown in FIG. 1 in which the container is bottom 4 as shown in FIG. In the upside-down state, the sphere 12 is located below and opens the hole 11. Therefore, in the normal state shown in FIG. 1, the food W does not leak from the hole 11 to the outside,
In the upside-down state shown in FIG. 2, a hole 11 is formed between the inside and the outside of the container.
To communicate via. In addition, on the inner surface side of the bottom portion 4, the spherical body 12
A conical cylindrical body 1 that is pointed upward to form a space for housing
3 is provided, the movement of the spherical body 12 is restricted by the conical cylindrical body 13, and the conical cylindrical body 13 is formed in a mesh shape to ensure the air flow to the outside. In the present embodiment, the check valve 10 constitutes pressure relief means for releasing the pressure in the container body 1 to the outside during heating and cooking.

The container body 1 having the above structure is formed of a thermoplastic resin by injection molding. Examples of the thermoplastic resin include polypropylene, high density polyethylene, polyethylene terephthalate, polycarbonate,
Examples include polyamide and polystyrene. In particular, polypropylene (polypropylene resin such as propylene ethylene copolymer) is preferable because it is light and has high mechanical strength, high heat resistance temperature and heat distortion temperature, excellent heat resistance, relatively inexpensive, and good moldability. . However, the material of the container body 1 is not limited to these, and non-conductive materials such as paper can be used in addition to synthetic resin. Especially, if it is formed from synthetic resin or paper, it is light and can be incinerated and discarded. Since it is relatively easy, it is preferable as a disposable container. Further, the container body 1 may be formed by sheet molding instead of injection molding,
A tubular label such as a shrink label may be attached to the outside of the body 3.

The seal lid 2 is adhered to the upper end of the container body 1 by heat sealing. The seal lid 2
As shown in FIG. 2, the disc-shaped heating element 20 is formed in a circular shape so as to match the upper opening of the container body 1, and the heating element 20.
And a sealant layer 21 provided on the lower surface of the. The heating element 20 is made of a conductive material, for example, a metal material such as iron, stainless steel, chromium, aluminum, or copper, or a non-metal material such as carbon. Particularly, iron or stainless steel is preferable because of high heat generation efficiency. In addition, the thickness is 10 μm to several hundreds μ
A metal foil such as aluminum foil or steel foil of m is preferable. A front-printed or back-printed film may be laminated on the upper surface of the heating element 20.

When the container having the above-mentioned structure is used for cooking, the container is placed upside down and placed on the cooking device. That is, the bottom part 4 is set on the cooker so that the bottom part 4 faces upward. Since the seal lid 2 is provided with the heating element 20, the heating element 20 heats and the food W inside is heated. At that time, since the check valve 10 communicates the inside and the outside of the container, steam generated when the food W is heated is discharged to the outside through the hole 11 of the check valve 10. Then, when the heating and cooking are completed, the normal state with the bottom portion 4 down is returned, and the seal lid 2 is peeled off from the container body 1, so that the cooked food W can be eaten.
In this state, the sphere 12 of the check valve 10 automatically closes the hole 11, so that the food W to be cooked does not leak from the hole 11 to the outside.

By providing the heating element 20 on the seal lid 2 as described above, the structure can be simplified and the manufacturing can be facilitated as compared with the case where the heating element 20 is provided on the bottomed cylindrical container body 1. Therefore, it can be manufactured at low cost.

Although the structure in which the check valve 10 is provided in the bottom portion 4 as the pressure relief means has been described, various configurations can be adopted as the pressure relief means. For example, as shown in FIG. 4, the through hole 30 is formed in the bottom portion 4. The seal piece 31 may be detachably attached to the outer surface of the bottom portion 4 so as to close the through hole 30. In this case, at the time of heating and cooking, the container is placed with the bottom portion 4 facing upward, the seal piece 31 is peeled off to open the through hole 30, and then the heating and cooking is started.
Steam is discharged to the outside from the through hole 30, and the through hole 30 functions as a pressure relief means. Then, when the heating and cooking are completed, the seal piece 31 is reattached and the through hole 30 is closed again, and then the seal lid 2 is peeled off with the bottom portion 4 of the container facing down to eat the food W inside. Incidentally, reference numeral 32 in the drawing denotes a mesh-shaped filter which covers the through hole 30 from the inside. In addition, the through hole 30 of the bottom portion 4 as the pressure relief means may be opened and closed by the plug instead of the seal piece 31.

Further, in the above embodiment, the seal lid 20 is adhered to the container body 1 by heat sealing, but the structure of the lid body is not limited to the seal lid 20 and the design can be changed as appropriate, and the top opening of the container body 1 can be changed. The top opening may be closed by fitting and adhering the lid body, which is sheet-formed so as to fit with the portion, to the container body 1. However, by adopting a configuration in which the plate-shaped heating element 20 is releasably adhered to the container body 1 by heat sealing via the sealant layer 21, the configuration of the lid is simple and the step of closing the top opening is also easy. Therefore, it is preferable. Incidentally, the sealant layer 2
1 does not need to be provided on the entire surface, and may be formed only on the periphery (peripheral portion) that is bonded to the flange portion 5.

The heating element 20 may be partially provided in addition to providing the heating element 20 over substantially the entire surface of the lid, and when the heating element 20 is partially provided, the area thereof is 80 mm or more. Therefore, it is preferable to provide it in the central portion of the lid made of film or paper. In this case, the sealant layer 21 is formed by laminating it on the film or paper that constitutes the lid.

In addition, the shapes of the heating element 20 and the container body 1 can be changed as appropriate. For example, the container body 1 may have a rectangular tube shape such as a quadrangle or a hexagon other than the cylindrical shape.

[0019]

As described above, by providing the heating element on the lid, the structure can be simplified and the manufacturing becomes easier and the cost can be reduced as compared with the conventional configuration in which the heating element is provided on the container body. It can be manufactured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an induction heating cooking container according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the container.

FIG. 3 is a cross-sectional view showing a usage state of the container.

FIG. 4 is a sectional view showing an induction heating cooking container according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Container body, 2 ... Seal lid (lid body), 3 ... Body part, 4 ...
Bottom portion, 5 ... Flange portion, 6 ... Rib, 10 ... Check valve (pressure relief means), 11 ... Hole, 12 ... Sphere, 13 ... Conical cylindrical body, 20 ... Heating element, 21 ... Sealant layer, 30 ... Penetration Hole (pressure relief means), 31 ... Sealing piece, 32 ... Filter, W ... Cooking target

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kaoru Takeo             5-3-18 Imazukita, Tsurumi-ku, Osaka             Company Fuji Seal F term (reference) 3K051 AC32 AC54 AD35 AD37 CD42                 4B055 AA09 BA07 BA28 CA02 CA22                       CA71 DA06 DB14 FA09 FB00                       FC00

Claims (2)

[Claims] 1. A bottomed tubular container body (1) made of a non-conductive material, and a lid (2) for closing an upper opening of the container body (1). ) Is provided with a heating element (20) that generates heat by electromagnetic induction. 2. The bottom (4) of the container body (1) is provided with pressure relief means (10, 30) for releasing the pressure in the container body (1) to the outside during heating and cooking.
The induction heating cooking container described.