JPH0727092U - Heating plate for electromagnetic cooker - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a heating plate for electromagnetic cooking that enables a safe and clean non-magnetic pan to be used in an electromagnetic cooker. [Structure] A silver paste is thinly transferred to the back surface of the ceramic plate 10 and fired to form a heat generating layer 11. The ceramic plate 10 on which the heat generating layer 11 is formed is a ceramic surface which is kept clean without being rusted or discolored by being submerged in a non-magnetic pot with the back side facing the bottom of the pot. Is visible from the outside of the pan.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention cannot be used as it is in an electromagnetic cooker. For example, by submerging it in heat-resistant glass, aluminum, copper, paper, a clay pot, etc., those pans can be used in an electromagnetic cooker. Regarding

[0002]

[Prior art]

 There is an electromagnetic cooker as a cooker that uses electromagnetic induction heating.

As shown in FIG. 4, the electromagnetic cooker is provided with an exciting coil 2 below the top plate 1, and an alternating current of 20 KHZ or more is passed through the coil 2 to generate an alternating magnetic flux, and the generated alternating An eddy current is generated by passing the magnetic flux through a pot made of, for example, stainless steel, enamel, or iron placed on the top plate 1. Then, the pot itself is heated by the Joule heat due to the electric resistance when the eddy current flows.

As described above, the electromagnetic cooker is a safe and clean cooker because it does not use a flame for heating.

By the way, an electromagnetic cooker has a flat bottom in order to efficiently receive a magnetic flux in a pot that can be used due to its heating principle, and it is a conductor so as to generate an eddy current. In order to generate heat with eddy current, it is necessary to have an appropriate electric resistance, and for example, only those made of enameled, iron, stainless steel, etc. could be used (these magnets attract Therefore, it is classified as a magnetic material for the sake of convenience).

For this reason, other than the above, for example, a pot made of a material that does not meet both requirements such as heat-resistant glass, pottery, aluminum and copper (sometimes referred to as a non-magnetic material for convenience because it does not attract a magnet). ) Cannot be used.

As one of the solutions, a heating plate for an electromagnetic cooker is considered.

The heating plate is made of a metal plate made of a stainless alloy, is submerged in the non-magnetic pot, receives the magnetic flux from the exciting coil, replaces the pot, and generates an eddy current to generate heat. The pot can be used in an electromagnetic cooker.

[0009]

[Problems to be solved by the device]

 However, since the above plate is made of a stainless alloy, an oxide film is formed on the surface of the plate during repeated use and the plate becomes dark.

This oxide film does not dissolve in water and does not directly affect the human body, but since it is put in a saucepan with food, it looks bad and is not clean. There is also a problem that the impression is very bad.

Further, in the above plate, the number of magnetic fluxes passing through the plate varies depending on the position of the pan placed on the top plate and the state of the plate submerged in the pan, and the amount of heat generated by the plate is uneven. Since it cannot be heated uniformly, there is a problem in that it causes inconvenience in boiling and cooking.

[0012] Therefore, an object of the present invention is to provide a heat generating plate for an electromagnetic cooker which is safe and good in appearance, and which can uniformly heat the entire pot.

[0013]

[Means for Solving the Problems]

 In order to solve the above problems, in this invention, a heating layer that generates heat due to changes in magnetic flux is formed over the entire surface of the back surface of the ceramic plate that is submerged in a container that cannot be used in an electromagnetic cooker.

At this time, it is also possible to form a non-heat generating portion in which a heat generating layer is not formed on the back surface of the plate.

Further, the plate may be provided with a plurality of through holes.

[0016]

[Action]

 In the heating plate for the electromagnetic cooker configured in this way, the back side of the ceramic plate (hereinafter referred to as the plate) is the bottom side of the container, and the ceramic side of the front side is facing up.

By doing so, the surface of the plate, which is the ceramic surface, can be seen.

Unlike a metal, this ceramic is not oxidized and does not cause darkening due to an oxide film.

Therefore, it is forever beautiful, is not easily scratched, does not rust even if scratched, does not easily attach dirt, and can be washed like tableware.

Further, the heat generating layer formed on the back surface generates an eddy current in response to a change in the magnetic flux passing therethrough and generates heat.

The heat generating layer can be formed by thinning a magnetic material such as stainless steel or iron, or a non-magnetic metal such as gold, silver or aluminum.

That is, since the non-magnetic metal is a conductor, an eddy current is generated due to a change in magnetic flux, but the resistance value is low and the amount of heat generation is small.

Therefore, by making the metal extremely thin and thin, the resistance value is increased and heat is generated.

Further, in the case where the non-heat generating portion in which the heat generating layer is not formed is provided on the back surface of the plate, since the heat generating layer is not formed in the non heat generating portion, an eddy current is not generated even if the magnetic flux passes. Without heat generation, the heat is transmitted so that the distribution of the heat generation amount becomes uniform over the entire surface of the plate so that heating can be performed evenly.

Further, in the case where the plate is provided with a plurality of through holes, the heat generation layer formed on the back surface side of the plate generates heat so that convection generated can be performed through the through holes. Prevents floating of the plate due to convection.

[0026]

【Example】

 The invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the heating plate for an electromagnetic cooker of this embodiment includes a disc-shaped plate (hereinafter referred to as a plate) 10 and a heat generating layer 11 formed on the back surface thereof.

The plate 10 is made of ceramics (ceramic) (for example, Devitro Ceramics having a diameter of 159.5 mm and a plate thickness of 3.0 mm), and is provided with a plurality of through holes 12 (for example, a hole diameter of 9.5 mm). There is.

Further, as shown in FIG. 3, the heat generating layer 11 is formed in a donut shape, and a non-heat generating portion 13 where the heat generating layer 11 is not formed is provided in the central portion thereof.

In the present embodiment, the heat generating layer 11 is made by using a silver paste, which is harmless to the human body, and thinly pasting the paste on the plate 10 by a transfer method, and baking the paste at a high temperature of about 820 to 830 degrees in a sintering furnace. It was formed by applying a cover coat to the surface.

Therefore, the heat generating layer 11 is firmly fixed to the plate 10 and is prevented from peeling off.

Further, since the heat generating layer 11 is formed thin and its resistance value is increased, the eddy current flowing due to the change of the magnetic flux can generate Joule heat and generate heat.

This embodiment is configured as described above, and the heating plate for the electromagnetic cooker is a clay pot, paper pot, wooden pot, ceramics, heat-resistant glass, copper, aluminum pot that cannot be used in the electromagnetic cooker. Put it in etc. and use it.

For example, one of such pans is filled with water, the heating plate for electromagnetic cooking of this embodiment is placed with the back side facing the bottom of the pan, and the ceramic plate is placed so that the plate 10 can be seen.

When this pan is placed on an electromagnetic cooker and the cooker is operated, the magnetic flux from the cooker passes through the plate 10 through the pan and an eddy current flows in the heat generating layer 11. Therefore, the heat generating layer 11 generates heat and heats the water in the pot.

At this time, since the heating layer 11 is provided on the back surface side of the plate 10, heated water causes the plate 10 to float up and rise due to convection. 12 escapes the water flow and prevents the plate 10 from rising.

Further, in the plate 10 which generates heat in this way, the amount of heat generated varies when the magnetic flux does not uniformly pass through the plate 10 depending on the size of the pot to be put in, the position of the pot placed on the top plate, and the like.

At this time, the non-heat generating portion 13 conducts heat so that the distribution of the amount of heat generated by the plate 10 becomes even and prevents unevenness.

[0039] Therefore, it is possible to prevent foaming that occurs when locally heated due to uneven heating, and to uniformly heat the pot.

On the other hand, since the surface of the plate 10 is made of ceramics, it does not rust even after repeated use, and does not become discolored, darkened or clouded. In addition, rust does not occur even when scratched.

Therefore, it is beautiful forever and when it is put in a pan, it looks beautiful and can maintain its state.

After use, it can be washed like tableware, so it can be kept clean forever.

In the embodiment, the surface of the plate 10 is plain. However, the surface is not limited to this, and like the picture plate, the surface of the plate 10 is painted with a coloring material or a glaze which is harmless to the human body. Decoration such as coloring may be performed.

Further, in the embodiment, the heat generating layer is formed by firing the silver paste, but the present invention is not limited to this, and a thin film of a conductor other than silver may be provided. A stainless plate or an iron plate may be attached to the back surface.

[0045]

【effect】

 This device is configured as described above, and by providing a heating layer on the back side of the ceramic plate, the ceramic surface that does not rust or discolor can be seen on the front side of the plate that can be seen when looking into the pan. Therefore, it is possible to provide a heating plate for an electromagnetic cooker that is clean and safe to look at.

Further, in the case where the plate is provided with the non-heat generating portion, the distribution of the calorific value of the plate can be made uniform, so that it is possible to successfully cook and cook.

Further, in the case where the plate is provided with the through hole, the plate can be prevented from being lifted up so that the heating can be performed well, and at the same time, the plate can be prevented from being lifted up so that the back surface cannot be seen. .

[Brief description of drawings]

FIG. 1 is a perspective view of a heating plate for an electromagnetic cooker according to an embodiment.

FIG. 2 is a sectional view of a heating plate for an electromagnetic cooker according to an embodiment.

FIG. 3 is a bottom view of the heating plate for the electromagnetic cooker according to the embodiment.

[Fig. 4] Action diagram of the electromagnetic cooker

[Explanation of symbols]

 10 plate 11 heating layer 12 through hole 13 non-heating part

Claims (3)

[Scope of utility model registration request] 1. A heating plate for an electromagnetic cooker, which is submerged in a container that cannot be used in an electromagnetic cooker and generates heat in response to a change in magnetic flux of the electromagnetic cooker in place of the container, the ceramic being submerged in the container. On the back of the plate,
A heating plate for an electromagnetic cooker that has a heating layer over the entire surface that generates heat due to changes in magnetic flux. 2. The heating plate for an electromagnetic cooker according to claim 1, wherein a non-heat generating portion having no heat generating layer is formed on the back surface of the plate. 3. The heating plate for an electromagnetic cooker according to claim 1, wherein the plate is provided with a plurality of through holes.