JP2005261648A - Rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker of electromagnetic induction heating type, which improves the taste of rice by the effect of far-infrared ray and enclosure of pasty stickiness in rice, and which includes an inner pot and inner cover with high warmth-retaining effect. <P>SOLUTION: An inner pot body 14 of the rice cooker of electromagnetic induction heating type is made of ceramics containing silicon dioxide, aluminum oxide, ferric oxide, titanium dioxide, and the like, and the outside surface of the inner pot body 14 including the center part of the outside bottom surface is formed with a heat generation layer 17 containing silver or the like. Additionally, the whole of the heat generation layer 17 is covered by a protection layer 18 containing silicon oxide, boron oxide, sodium oxide, potassium oxide. The inner cover 15 has a steam releasing hole 19 made of porous ceramic. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rice cooker of an electromagnetic induction heating system provided with a detachable inner pot and an inner lid used for general household use or business use.

  In recent years, in an electric rice cooker, since energy efficiency is high and delicious rice can be cooked quickly with high output, there are many electromagnetic induction heating rice cookers.

  This electromagnetic induction heating rice cooker is generally configured as shown in FIG. Hereinafter, this structure and the rice cooking principle will be described.

  As shown in FIG. 7, an electromagnetic induction heating rice cooker 71 includes a rice cooker body 72, an outer lid 73 that covers the upper surface opening of the rice cooker body 72, stainless steel that is detachably stored in the rice cooker body 72, and the like. An inner lid 74 that covers the upper surface opening of the inner hook 74, an electromagnetic induction coil 76 that consists of a copper wire for heating the inner hook 74, and a control unit (not shown).

  The electromagnetic induction heating rice cooker 71 generates an eddy current on the bottom surface of the inner pot 74 made of a magnetic material disposed on the electromagnetic induction coil 76 by an alternating magnetic field generated by passing an alternating current through the electromagnetic induction coil 76. The bottom of the inner pot 74 is heated by the resistance heating to cook rice, and the steam generated during the rice cooking is a hole (not shown) drilled in the inner lid 75 and the outer lid 73. This is the principle of discharging to the outside of the rice cooker through a hole (not shown) drilled in.

However, in such a conventional rice cooker 71, since it is necessary to generate an eddy current at least on the bottom surface of the inner pot 74 by electromagnetic induction, the inner pot 74 is limited to a magnetic material such as stainless steel or iron. In addition, there is a problem that a ceramic inner pot such as ceramics suitable for cooking delicious rice can not be used due to the effect of far-infrared rays and heat retention.

  Further, in the conventional rice cooker, the inner lid 75 is simply pierced to release the steam during cooking to the outside, and it is one of the deliciousness of rice (the paste-like shape that appears during rice cooking). There was a problem that the product was released with steam.

  In order to solve the first problem, the present invention is configured such that the inner pot is made of ceramic such as ceramic, and the inner pot shape is uniformly formed on the outer surface including the bottom of the inner pot. The protective layer is formed so as to cover the entire heat generating portion.

  By adopting such a configuration, far-infrared rays are emitted from the ceramic inner pot during rice cooking, and the rice core can be cooked evenly, so the taste of rice can be improved. Furthermore, since the specific heat of the ceramic inner pot is higher than that of the metal inner pot, the heat retention effect after cooking rice can be improved.

  Furthermore, in order to solve the second problem, the present invention is such that a porous ceramic is formed in the vapor discharge hole of the inner lid.

  By adopting such a structure, one of the deliciousness of rice, rice cake (rice paste) is released from the steam discharge hole to the outside of the inner pot with steam. Can be prevented, so that the taste of rice can be improved.

As described above, in the present invention, the inner pot is made of ceramic (ceramics, etc.) and the inner pot shape is formed, and the heat generating portion made of a magnetic metal material is uniformly formed on the outer surface including the bottom portion so as to cover the entire heat generating portion. Since the layer is formed, it is possible to cook delicious rice with no unevenness to the core of rice by the far-infrared effect. In addition, because of the ceramic inner pot, the heat retention effect after cooking is enhanced. Furthermore, since the vapor discharge hole of the inner lid is made of porous ceramic, it is possible to prevent the sticky rice from being released from the inner pot during cooking, so the taste of rice can be improved. Is.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 is a vertical sectional view showing an inner pot for an electromagnetic induction heating rice cooker showing an embodiment of the present invention, and FIG. 3 is a bottom view of the inner pot shown in FIG. 4 is a vertical sectional view showing an inner lid for an electromagnetic induction heating rice cooker showing an embodiment of the present invention, and FIG. 5 is a bottom view of the inner lid shown in FIG.

  As shown in FIG. 2, the inner pot body 21 for the electromagnetic induction heating type rice cooker of the present embodiment includes silicon dioxide, aluminum oxide, ferric oxide, titanium dioxide, calcium oxide, magnesium oxide, sodium oxide, potassium oxide and It is made of porcelain containing lithium oxide. The inner pot main body 21 is fired by using reinforced porcelain materials such as quartz, sericite, kaolinite, and alumina as main raw materials.

  As shown in FIG. 3, a heat generating layer 32 containing silver is formed on the outer bottom surface of the inner pot main body 21, and silicon oxide, boron oxide, sodium oxide, potassium oxide are coated so as to cover the entire heat generating layer 32. The protective layer 33 containing is formed.

  As shown in FIG. 3, the heat generating layer 32 is provided with a large number of non-heat generating portions 34 where the heat generating layer 32 does not exist. In these non-heat generating portions 34, the outer bottom surface 31 of the inner hook is directly covered with the protective layer 33.

  The method for forming the heat generating layer 32 is not particularly limited. For example, a screen printing method or a pad printing method is preferable. In the case where the heat generating layer 32 is formed by such a printing method, an effect that the uniformity of the film thickness of the heat generating layer 32 is increased by arranging a large number of spot-like non-heat generating portions 34 in the entire heat generating layer 32. Can also be obtained.

  On the other hand, as shown in FIG. 4, the inner lid 40 includes a sealing portion 45 between the inner lid main body 41 and the inner hook including the handle 42, the inner height platform 43, and the outer height platform 44, and a vapor discharge hole 46.

  The inner lid body 41 is made of porcelain containing silicon dioxide, aluminum oxide, ferric oxide, titanium dioxide, calcium oxide, magnesium oxide, sodium oxide, potassium oxide and lithium oxide. The inner lid main body 41 is fired by using reinforced porcelain materials such as quartz, sericite, kaolinite, and alumina as main raw materials.

  Further, as shown in FIG. 5, the inner height 53, the outer height 54, and the sealing portion 55 with the inner hook are formed in a donut shape with respect to the center of the inner lid 50 in a bottom view. The sealing portion 55 with the inner pot is formed of a silicon resin or the like that conforms to the standards of the Food Sanitation Law “Food / Additives”.

  Further, the vapor discharge holes 46 and 56 shown in FIGS. 4 and 5 are made of porous ceramic and fired simultaneously with the inner lid bodies 41 and 51.

  The method of using the inner pot and the inner lid for the electromagnetic induction heating rice cooker as described above may be the same as the conventional one. As shown in FIG. 1, the inner pot body 14 and the inner lid 15 are connected to the electromagnetic induction heating rice cooker 11. When the power is turned on, an alternating magnetic field generated from the electromagnetic induction coil 16 generates an eddy current in the heat generating layer 17 on the outer bottom surface of the inner pot main body 14, and the heat generating layer is generated by electric resistance heat generation at this time. Since 17 generates heat, this heat is transmitted to the inner pot body 14 and can be cooked.

  Moreover, since the vapor | steam discharge | release hole 19 of the inner cover 15 consists of porous ceramics, only a vapor | steam is discharge | released outside at the time of rice cooking, and the stickiness (rice cake) can be kept inside the inner pot main body 14 inside.

In this embodiment, since the inner pot body 14 of the electromagnetic induction heating rice cooker is made of ceramic, it can be cooked evenly to the core of the rice by the far-infrared effect during rice cooking, and the taste of rice is improved. Can do. Moreover, the deliciousness of rice can be maintained even after cooking rice by the heat-retaining effect of the ceramic. Furthermore, since the vapor discharge hole of the inner lid 15 is made of porous ceramic, the rice cake is not produced outside the inner pot main body 14 during rice cooking, so that the taste of rice is improved. Can do.

  Next, an inner pot for an electromagnetic induction heating rice cooker which is a second embodiment of the present invention will be described with reference to FIG. 6 which is a vertical sectional view of the inner pot.

  In the second embodiment of the inner pot for the electromagnetic induction heating rice cooker shown in FIG. 6, the inner pot body 61 has a curved shape at the center of the outer bottom surface of the inner pot body 61, It also has a curved shape between the side surfaces. A heat generating layer 62 is formed so as to cover the outer surface including the outer bottom surface of the inner pot main body 61 having such a shape, and a protective layer 63 is formed so as to cover the entire heat generating layer 62.

  Since the heat generating layer 62 is formed not only on the outer bottom surface of the inner pot main body 61 but also on the outer side, the inner pot of this embodiment having such a configuration can improve the heating performance during cooking. . ,

  The inner pot and the inner lid for the electromagnetic induction heating type rice cooker according to the present invention can be widely used when cooking with a generally used electromagnetic induction heating type rice cooker, and electric rice cooking other than the electromagnetic induction heating type It can also be used for cooking rice using a cooker, gas stove, microwave oven, oven, halogen heater, etc. The inner pot according to the present invention can also be used as an inner pot of an electric pot including an electromagnetic induction heating type. .

Sectional drawing which shows the electromagnetic induction heating type rice cooker of this invention typically. Sectional drawing which shows typically the 1st Example of the inner pot for electromagnetic induction heating type rice cookers of this invention. The bottom view of the inner pot for electromagnetic induction heating type rice cookers shown in FIG. Sectional drawing which shows typically one Example of the inner cover for electromagnetic induction heating type rice cookers of this invention. The bottom view of the inner pot for electromagnetic induction heating type rice cookers shown in FIG. Sectional drawing which shows typically the 2nd Example of the inner pot for electromagnetic induction heating type rice cookers of this invention. Sectional drawing which shows the conventional electromagnetic induction heating type rice cooker typically.

Explanation of symbols

11, 71 Electromagnetic induction heating type rice cooker 12, 72 Rice cooker body 13, 73 Outer lid 14, 21, 61 Inner pot body 15, 40, 50, 75 Inner lid 16, 76 Electromagnetic induction coil 17, 22, 32, 62 Heat generation layer 18, 23, 33, 63 Protective layer 19, 46, 56 Vapor discharge hole 31 Outer bottom surface of inner pot 34 Non-heat generation portion 41, 51 Inner lid body 42 Handle 43, 53 Inner height 44, 54 Outer height 45, 55 Sealing part 74 Inner pot

Claims (2)

  A rice cooker provided with a main body, an inner pot that is detachably accommodated in the main body, an induction heating coil that electromagnetically heats the inner pot, and an inner lid that detachably covers the inner pot. An inner pot body made of ceramic containing silicon dioxide, aluminum oxide, ferric oxide, titanium dioxide, calcium oxide, magnesium oxide, sodium oxide, potassium oxide and lithium oxide, and an inner surface including the outer bottom face of the inner pot body An exothermic layer containing at least one of platinum, silver, palladium, nickel, silicon carbide, cantal, and nicrotal formed on the outer surface of the pot body, and any of silicon oxide, boron oxide, sodium oxide, and potassium oxide A rice cooker comprising: a protective layer that is contained and covers the heating element. In the rice cooker provided with a main body, an inner pot that is detachably stored in the main body, an induction heating coil that electromagnetically heats the inner pot, and an inner lid that detachably covers the inner pot, An inner lid body made of ceramic containing silicon dioxide, aluminum oxide, ferric oxide, titanium dioxide, calcium oxide, magnesium oxide, sodium oxide, potassium oxide and lithium oxide, and from the lower surface to the upper surface of the inner lid body A rice cooker comprising a vapor discharge hole made of a porous ceramic provided to penetrate therethrough.

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