JP2007260213A - Cooking vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vessel capable of cooking according to the kind of a content by partially changing a heating temperature. <P>SOLUTION: This cooking vessel is so formed that heating elements heated by an eddy current are continuously or non-continuously closely stuck to at least the inner face of the bottom of a nonmagnetic vessel body having the bottom part and an opening part in the opposite side of the bottom; and is characterized in that the bottom has the inner face of different heights relative to a landing part of a vessel body so as to induction-heat the heating elements, the heating elements are formed by having prescribed dimensions for every inner face of the respective heights of the bottom part, the vessel body is composed of a composite cardboard of polypropylene resin, polyethylene resin, polyester resin, styrene resin, or cardboard or a composite cardboard of the cardboard and either one of the resins, and the heating element is composed of stainless steel, steel or aluminum. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cooking container capable of electromagnetic induction heating.

In recent years, various types of cooking containers capable of electromagnetic induction heating have been put on the market, which are equipped with a heating element that generates heat by eddy current in a non-magnetic container body. As the container body, paper, plastic, glass, copper, ceramics, stainless steel are used. Or the heating container which uses ceramics and uses aluminum foil as a heat generating body is proposed (for example, refer patent document 1).
JP 2003-325327 A

  However, the proposed heating container cannot be heated by changing the partially warming temperature depending on the type of contents.

  The subject of this invention is providing the container which can be cooked by changing heating temperature partially according to the kind of content.

  In the invention according to claim 1 of the present invention, a heating element that generates heat by eddy current is in close contact with the bottom and the inner surface of at least the bottom of the nonmagnetic container main body having an opening on the opposite side of the bottom. In the cooked cooking container, the bottom portion has inner surfaces at different heights that can dielectrically heat the heating element with respect to the grounding portion of the container body, and the heating element is provided for each inner surface at each height of the bottom portion. It is a cooking container characterized by having a predetermined size.

  The invention according to claim 2 of the present invention is the invention according to claim 1, wherein the container main body is made of polypropylene resin, polyethylene resin, polyester resin, styrene resin, paperboard or paperboard, and any one of the above resins. It is a cooking container characterized by comprising a composite paperboard.

  The invention according to claim 3 of the present invention is the cooking container according to claim 1 or 2, wherein the heating element is made of stainless steel, iron or aluminum.

  In the cooking container of the present invention, a heating element that generates heat due to an eddy current is in close contact with a bottom and an inner surface of at least the bottom of a non-magnetic container body having an opening on the opposite side of the bottom. In the cooking container, the bottom portion has an inner surface at different heights that can dielectrically heat the heating element with respect to the grounding portion of the container body, and the heating element has a predetermined size for each inner surface at each height of the bottom portion. The container body is made of polypropylene resin, polyethylene resin, polyester resin, styrene resin, paperboard or a composite paperboard of any one of the above resins and the heating element is made of stainless steel Since it is made of iron or aluminum, it can be heated by changing the heating temperature for each inner surface at each height at the bottom, and if the container is divided by a partition plate for each inner surface at each height, By the size of the height and the heating element of the body is heated capability different for different, it can be heated by changing the temperature for each separator.

The cooking container of the present invention will be described in detail below along the embodiment. Fig.1 (a) is sectional drawing which shows one Embodiment of the heating cooking container of this invention, and a heating cooking container (1) has a bottom part (11) below a container main body (10), and cooks at an upper end. The heating element (13) is in intimate contact with the inner surface of the bottom (11). The bottom portion (11) has inner surfaces at heights h ₁ , h ₂ , and h ₃ that can dielectrically heat the heating element (13) that is in close contact with the grounding portion (19) of the container body (10). Although not shown, the heating element (13) is respectively made with a predetermined size for each height h ₁ and h ₂ and h _3, (b) the other cooking vessel It is sectional drawing which shows embodiment, and the heating cooking container (2) has the heat generating body (14) and the heat generating body (15) discontinuously closely contacted with the inner surface of the bottom part (11), and is illustrated. no but the heating element (14) comprises a predetermined size to the height of h _1, the heating element (15) respectively for each height h ₂ and h ₃ to have a predetermined size (C) is a cross-sectional view showing still another embodiment of the cooking container, and the cooking container (3) similarly generates heat on the inner surface of the bottom (11). (16) and the heating element (17) and the heating element (18) is tightly discontinuous, although not shown, the heating element (16, 17, 18) is of h ₁ and h ₂ and h _3, respectively Each height has a predetermined size.

  In order for the heating element to generate heat due to eddy current, it is necessary to have a certain area or more. Therefore, the heating element has a predetermined size means that the heating part has a certain area or more. In other words, it means that a portion having a certain area or less is used for a portion that does not generate heat.

A nonmagnetic partition plate may be provided for separating the portions having heights h ₁ , h _2, and h ₃ .

Usually, h ₁ is 5 to 10 mm, h ₂ is 10 to 20 mm, and h ₃ is in the range of 0.1 to 5 mm.

  The container main body (10) is made of polypropylene resin, polyethylene resin, polyester resin, styrene resin, paperboard, or composite paperboard of any one of the above resins, and these are all non-magnetic materials.

  The heating elements (13, 14, 15, 16, 17, 18) are made of a material that generates heat by eddy current, and the material is preferably stainless steel, iron, or aluminum, and the thickness and size are appropriately selected.

  As described above, the heat cooking container according to the present invention has a heating element having a predetermined size for each height at different heights with respect to the grounding portion of the container body. It is possible to cook partly at different heating temperatures.

  Although the cooking-by-heating container of this invention is demonstrated according to a specific Example below, this invention is not limited to these Examples.

Polypropylene resin is used as the material of the container body (10), aluminum foil having a thickness of 9 μm is used as the material of the heating element, the inner diameter is 20 cm, and h ₁ is 5 mm with respect to the grounding part (19). ₂ has a height of 10 mm, h ₃ has a height of 0.2 mm, and has a bottom (11) having an inner surface of h ₁ part / h ₂ part / h ₃ part = 5/3/2 (area ratio), A circular container body (10) having an opening (12) having a diameter of 25 cm is prepared, and the inner surface of the bottom (11) of the container body (10) has the same size as the inner surface of the bottom as a heating element. An aluminum foil having a thickness of 9 μm was continuously brought into close contact with each other to prepare a cooking container according to the present invention.

In Example 1, a 9 μm thick aluminum foil having the same size as the inner surface of the bottom portion is cut into the inner surface of the bottom portion (11) of the container body (10) by cutting the h ₁ portion and the h ₂ portion. The cooking container according to the present invention was prepared in the same manner except that the heating cooking container was closely connected.

In Example 1, an aluminum foil having a thickness of 9 μm having the same size as the inner surface of the bottom portion is formed on the inner surface of the bottom portion (11) of the container body (10) by h ₁ portion, h ₂ portion and h ₃ portion. A cooked container of the present invention was prepared in the same manner except that it was cut and discontinuously close.

  Hereinafter, comparative examples of the present invention will be described.

There is no h ₁ part and h ₂ part, and a comparative example is the same as in Example 3 except that a 9 μm thick aluminum foil having the same size as the inner surface of the bottom part is in close contact with only the h ₃ part. A cooked container was created.

<Evaluation>
Using the cooking container of the present invention of Examples 1 to 3 and the cooking container for comparison of Example 4, a partition plate is used as a heating element at the boundary of the inner surface portions of different heights at the bottom of each cooking container. After closely inserting, a predetermined amount of water with a water temperature of 15 ° C. was placed on the IH cooking heater, and the water temperature of each part after heating for 1 minute was measured and evaluated. The evaluation results are shown in Table 1.

表１に示すように、実施例１〜３の本発明の加熱調理容器を使用したものは、仕切板で区切られた部分の水温がそれぞれ異なる温度になっており、異なる加熱温度で加熱が可能であり、一方、実施例４の比較用の加熱調理容器を使用したものは、発熱体を有しないｈ₁とｈ₂の部分は当然加熱されないので、水温が上昇せず、発熱体を有するｈ₃の部分も発熱体の大きさが小さくて加熱されず、水温が上昇していない。

As shown in Table 1, those using the cooking containers of the present invention of Examples 1 to 3 have different water temperatures at the portions separated by the partition plates, and can be heated at different heating temperatures. On the other hand, in the case of using the comparative cooking container of Example 4, the portions h ₁ and h ₂ that do not have the heating element are naturally not heated, so that the water temperature does not rise and h that has the heating element. _In part ₃ , the size of the heating element is too small to be heated and the water temperature does not rise.

(A) is sectional drawing which shows one Embodiment of the heating cooking container of this invention, (b) is sectional drawing which shows other embodiment of a heating cooking container, (c) is still another cooking-by-heating container. It is sectional drawing which shows this embodiment.

Explanation of symbols

1, 2, 3 heated cooking container 10 ... container main body 11 ... bottom 12 ... opening 13,14,15,16,17,18 ... heating element 19 ... ground portion _{h 1, h 2, h 3} ... Height

Claims (3)

  A heating cooking container in which a heating element that generates heat due to eddy current is continuously or discontinuously in contact with an inner surface of a bottom and a nonmagnetic container body having an opening on the opposite side of the bottom, and the bottom is The inner surface has different heights at which the heating element can be dielectrically heated with respect to the grounding portion of the container body, and the heating element has a predetermined size for each inner surface at each height of the bottom. Characteristic cooking container.   The cooking container according to claim 1, wherein the container body is made of polypropylene resin, polyethylene resin, polyester resin, styrene resin, paperboard, or composite paperboard of any one of the resins.   The cooking container according to claim 1 or 2, wherein the heating element is made of stainless steel, iron or aluminum.

Images