JPH0824136A - Tableware heating body for induction heating cooker - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a scorch on the lower side of a heating body and allow rice cake or the like to be cooked with an earthen pot by tightly forming a conductive layer capable of generating heat due to an overcurrent flow on the upper surface of a plate made of material not obstructing the transmission of a line of magnetic force, regarding tableware formed out of material capable of transmitting a line of magnetic force. CONSTITUTION:A heating body is formed out of an iron plate 2 bonded to the surface of a ceramic disc 1 and the surface of the body is coated with heat resistant paint. At a cooking process, an earthen pot is placed on an induction heater, the heating body is placed on the inner bottom of the pot with the conductive layer directed upward, and water and a cooking ingredient are supplied thereto. When the cooker is operated in that state, a line of magnetic force passes the pot and the heating body as well to reach the conductive layer, thereby generating overcurrent and subsequent heat. In this case, the heating body generates heat only at the side where the conductive layer is formed, and the heat is transmitted from the upper side thereof to the reverse side. The upper side is cooled with water and hardly reaches a temperature level of 100 deg.C or above. Thus, a noodle soup or the like covers the heating body, and a scorch is thereby prevented from occurring between the reverse side of the heating plate 2 and the bottom of the pot.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tableware for an electromagnetic cooker, and more particularly, it is used by immersing it in the bottom of a tableware such as a clay pot, a paper pot, or a stone pot that transmits magnetic field lines, and is used in the food service industry and general households. .

[0002]

2. Description of the Related Art Conventionally, a heating plate is commercially available which is devised so that a magnetic plate can be submerged in a clay pot and heated by an electromagnetic cooker for cooking. A large number of holes are formed in this conventional heating plate, and when the water in the pan boils, the bubbles generated on the back side of the heating plate float above the holes. In addition, the gap between the bottom of the pan and the back of the heating plate has poorer water circulation than the top of the heating plate, so in dishes where sticky broth such as udon and rice cakes is produced, this broth easily sticks to the back of the heating plate. In addition, if it burns, it is difficult to take out the heating plate.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a method for solving the drawbacks of using a conventional heating plate having a hole, such as a charring on the back side and a problem that food is clogged in the hole. It was an issue.

[0004]

Means for Solving the Problems The inventor of the present invention has found that if the temperature on the back side of the heating plate is lower than that on the surface, water boils on the front surface of the heating plate and does not boil on the back surface. I thought it might not be necessary to open it. The reason why the hole is required in the heating plate is that the heating plate generates heat as a whole, so that water also becomes steam on the back surface of the heating plate and escapes these bubbles. Since the bubbles are generated only on the front surface and no bubbles are generated on the back surface, holes for allowing bubbles to escape are unnecessary, and since the temperature on the back surface of the heating body is lower than that on the front surface, burning can be prevented.

As a means for this, in a tableware made of a material such as ceramics, glass, stone, or synthetic resin that transmits magnetic field lines, a size that can be submerged in the tableware,
In addition, a heating plate was formed in which a conductive layer, which generates heat when an eddy current flows, is closely formed or fixed on the upper surface of a plate made of a material that does not hinder the transmission of magnetic force lines.

[0006]

[Operation] A clay pot is placed on the electromagnetic cooker, and the heating element according to the present invention is placed on the bottom of the pot with the conductive layer on top, and water and food materials are put therein. When the electromagnetic cooker is activated in this state, the lines of magnetic force pass through the clay pot and also through the heating element, reaching the conductive layer,
Generates an eddy current and generates heat. At this time, in the heating element, only the side where the conductive layer is provided generates heat, and the back side of the heating element only receives heat from the front side and becomes hot. Since the heat generating surface on the front side is cooled with water, it is hard to reach 100 ° C or higher. And, if the boiling liquid of the wrap encases the heating element and the conventional heating plate is in a state where the back side of the heating plate and the bottom of the pot begin to burn, the heating body according to the present invention does not burn. .

If the heating plate is only for heat generation,
In the case of a magnetic plate, about 0.5 mm is enough, but the conventional one is about 2 mm thick and heavy. This makes the heating plate stable in water, especially when boiling. The bubbles of water vapor generated on the back side push the heating plate up and prevent it from moving or vibrating.
However, the fact that the thickness of the heating element is thick indicates that the surface temperature of the heating element tends to be different between the upper surface and the lower surface. That is, the upper surface of the heating plate placed on the bottom of the clay pot is
Since it is cooled more easily than the lower surface, the temperature on the lower surface side becomes higher. Therefore, the high temperature on the lower surface side is transmitted to the upper surface side inside the heating plate, that is, the thicker the heating element, the larger the temperature difference. Conversely, if the heat generating conductive layer is thin, there is no difference in temperature between the upper surface and the lower surface of the conductive layer.

The heating element according to the present invention is formed integrally by arranging a conductive layer that generates heat on the upper side and a layer that blocks heat on the lower surface side of the conductive layer on the lower side so that they are in close contact with each other. . Therefore, the temperature of the lower surface of the heating element, that is, the temperature of the gap with the bottom of the clay pot is always lower than the temperature of the upper surface of the heating element. Therefore, the heat-shielding layer on the lower surface side is not limited to a ceramic plate, a vitreous material, a heat-resistant synthetic resin, a stone material, a bakelite plate, or the like, and may be heat insulation by a paint. The conductive layer that generates heat may be 0.2 mm or less if it is a good conductor of electricity such as a silver thin film or an aluminum sprayed layer, and may be 0.6 mm or less if it is a magnetic plate such as an iron plate. It will be.
Also, a carpon plate can be used as the conductive layer, but it needs to have a thickness of about 3 mm. In this case, since there is a difference between the upper surface and the lower surface in the way of being cooled as described above, the upper surface and the lower surface of the carbon itself are different. A large temperature difference will occur. Therefore, the temperature of the gap between the 3 mm carbon plate and the 3 mm ceramic plate is 100 ° C.
It rises above the above level and becomes charred, so it cannot be used. .

[0009]

[Examples] The examples shown in the drawings will be described in more detail below. FIG. 1 is a sectional view of a disc-shaped heating element according to the present invention. The heating element is a ceramic disc with a 0.4 mm iron plate bonded to the surface and the surface coated with heat-resistant paint. FIG. 2 shows another embodiment in which a conductive layer is provided on the upper surface of a donut-shaped pottery disk, and feet are attached to the lower surface so that the heating plate does not adhere to the bottom of the pot. Water enters from the surroundings and flows upward through the central hole. As the conductive layer, a thin silver film is used, and the surface is covered with glaze. FIG. 3 shows another embodiment in which a heating plate made of heat-resistant synthetic resin is placed inside a glass pot.
Further, the heating plate is formed in a shape conforming to the carp on the inside of the pot, and aluminum of 50 microns is formed on the inner surface by a thermal spraying method, and the surface is further coated. Also, feet are attached to make a gap with the bottom of the glass pot.

[0010]

As described above, since the lower surface of the heating element has a non-stick structure, it is possible to add rice cakes and udon when cooking in a clay pot. In addition, since water does not boil on the lower surface side of the heating element and the heating element does not float up, it is not necessary to add weight and can be made light. Moreover, since it is not necessary to provide a small hole in the heating element, cleaning is easy. Not only earthenware pots, but also paper pots, plastic pots, and other materials that allow magnetic field lines to pass through are very convenient because they can heat only the inside of the tableware on which the heating element is placed, regardless of the shape of the tableware.

[Brief description of drawings]

FIG. 1 is a partially cutaway view of a perspective view of a heating plate in which an iron plate serving as a heating element is bonded to a circular plate made of ceramics showing one embodiment of the present invention, and a heat resistant paint is applied on the plate.

FIG. 2 is another embodiment of the present invention, in which a silver thin film is attached to the upper surface of a donut-shaped pottery disk and covered with glaze,
FIG. 6 is a partially cutaway view of a perspective view of a foot provided on the lower surface.

[FIG. 3] In another embodiment of the present invention, a heat-resistant synthetic resin is used as the material of the heating plate, aluminum is sprayed as the heating element, and the heating plate coated with heat-resistant paint is placed on the bottom of the glass pan. FIG.

[Explanation of symbols]

 1 …… Ceramic disk 2 …… Steel plate 3 …… Adhesive 4 …… Heat-resistant paint 5 …… Silver thin film 6 …… Glazed 7 …… Aluminum sprayed layer 8 …… Heat-resistant synthetic resin 9 …… Glass pot

Claims (1)

[Claims] 1. A tableware made of a material such as ceramics, glass, stone, or synthetic resin that allows magnetic field lines to pass therethrough. The tableware is made of a material that is submerged in the tableware and does not interfere with the transmission of magnetic field lines. A heating body for tableware for an electromagnetic cooker, characterized in that a conductive layer that generates heat when an eddy current flows is formed in close contact with or fixed to the upper surface of the plate.