JP2557238Y2 - Heating plate for induction cooker - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] This invention can not be used in an electromagnetic cooker as it is, for example, heat-resistant glass, aluminum,
The present invention relates to a heating plate for an electromagnetic cooker, which is immersed in copper, paper, an earthen pot or the like so that the pot can be used in the electromagnetic cooker.

[0002]

2. Description of the Related Art There is an electromagnetic cooker as a cooker utilizing electromagnetic induction heating.

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

[0004] As described above, the electromagnetic cooker is a safe and clean cooker because no flame is used for heating.

[0005] By the way, the electromagnetic cooker is based on the principle of heating, and a pot that can be used is a conductor having a flat bottom for efficiently receiving a magnetic flux, and a conductor capable of generating an eddy current. It was necessary to have an appropriate electric resistance to generate heat by electric current. For example, only those made of enamel, iron, stainless steel, etc. could be used. For convenience, it is classified as a magnetic material).

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

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

The heat generating plate is made of a metal plate made of stainless steel, is immersed in the nonmagnetic pot, receives the magnetic flux from the exciting coil, replaces the pot, generates eddy current, and generates heat. The pot can be used in an electromagnetic cooker.

[0009]

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

This oxide film does not dissolve in water,
Although it does not directly affect the human body, it has a problem that it is put in a pot with food, so it looks bad and has a very bad impression in terms of cleanliness.

[0011] Moreover, in the plate, the state of the plate is submerged in the position and pan pot to be placed on the top plate, different number of magnetic fluxes passing through the plate, it is uneven heating of the plate, uniform whole pot There is also a problem that cooking and cooking become inconvenient because they cannot be heated.

An object of the present invention is to provide a heating plate for an electromagnetic cooker that is safe and has a good appearance and can uniformly heat the whole pot.

[0013]

To solve the above problems BRIEF SUMMARY OF THE INVENTION In this invention, the back surface of the ceramic plate that is submerged in a container that can not be used in an induction heating cooker, over the entire surface
An electromagnetic cooker with a heating layer that generates heat due to changes in magnetic flux
Heating plate on the back of the plate
Non-heating part where no heat is formed, and the distribution of heat generation is even
It was configured so that

[0014]

In the heating plate for an electromagnetic cooker thus configured, the ceramic plate (hereinafter, plate) is sunk with the back side of the plate facing the bottom of the container and the ceramic side on the front side facing upward.

By doing so, the surface of the plate serving as the ceramic surface can be seen.

This ceramic, unlike metal, is not oxidized and does not cause blackening due to an oxide film.

[0017] For this reason, it is beautiful forever, is hard to be scratched, etc., does not rust, does not easily adhere to dirt even if it is scratched, and can be washed like tableware.

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

This heat generating layer can be formed by reducing the thickness of non-magnetic metals such as gold, silver and aluminum in addition to magnetic materials such as stainless steel and iron.

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

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

[0022] Then, the plate back side, by providing the non-heat generating portion which is not formed in the heat generating layer, the non-heating portion, since the heat generating layer is not formed, not to cause eddy current is also passed through the magnetic flux without heating, the distribution of the amount of heat generated over the plate entire conduct heat as is equalized, Ru can evenly heated.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

As shown in FIGS. 1 and 2, the heating plate for an electromagnetic cooker according to the present embodiment comprises a disk-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 ceramic (porcelain) (for example, a Devitro plate having a diameter of 159.5 mm and a thickness of 3.0 mm).
And a plurality of through holes 12 (for example, a hole diameter of 9.5 mm).

As shown in FIG. 3, the heat generating layer 11
It 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 center.

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

For this reason, the heat generating layer 11 is firmly fixed to the plate 10 so as not to peel off.

Further, since the heat generating layer 11 is formed thin and has a high resistance value, Joule heat can be generated by the eddy current flowing due to a change in magnetic flux, and heat can be generated.

This embodiment is configured as described above, and the heating plate for the electromagnetic cooker can be used in an electric cooker, a paper pot, a wooden pot, a ceramic,
Use in heat-resistant glass, copper, aluminum pan, etc.

For example, fill one of such pots with water,
The heating plate for electromagnetic cooking according to the present embodiment is placed with the back surface facing the bottom of the pot, and sunk so that the plate 10 can be seen with the ceramic surface facing upward.

When the pan is placed on an electromagnetic cooker and the cooker is operated, magnetic flux from the cooker causes the plate 1 to pass through the pan.
0, and an eddy current flows through the heat generating layer 11. For this reason,
The heating layer 11 generates heat and heats the water in the pot.

At this time, since the heat generating layer 11 is provided on the back side of the plate 10, the heated water causes the plate 10 to float due to convection and to rise. Escapes the water flow to prevent the plate 10 from rising.

The plate 10 that generates heat in this way is
If the magnetic flux does not uniformly pass through the plate 10 due to the size of the pot to be put, the position of the pot placed on the top plate, and the like, the calorific value becomes uneven.

At this time, the non-heat generating portion 13 is
The heat is conducted so as to make the distribution of the calorific value uniform, thereby preventing unevenness.

Therefore, it is possible to prevent bubbling 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 discolor and become dark or cloudy. Also, rust does not occur even when scratched.

[0038] For this reason, it is beautiful forever, looks beautiful when placed in a pot, and can maintain that state.

After use, the dishes can be washed as well as the dishes, so that they can be kept clean forever.

In the embodiment, the surface of the plate 10 is plain. However, the present invention is not limited to this. Painting and coloring can be performed with a coloring material or glaze that is harmless to the human body, like a picture plate. Or the like.

In the embodiment, the heat generating layer is formed by firing silver paste. However, the present invention is not limited to this, and a thin film made of a conductor other than silver may be provided. Alternatively, a stainless steel plate, an iron plate, or the like may be attached.

[0042]

EFFECT This invention is configured as described above, the heat generating layer provided on the back surface of the ceramic plate, on the front side of the plate which is visible when viewed through the pan, or rust. Thus ceramic surface does not change color is visible, clean, safe der also to look
In addition, by providing a non- heating part on the plate ,
The distribution of the calorific value of the plate can be evened out
Thus, it is possible to provide a heating plate for an electromagnetic cooker that can cook and cook well .

[Brief description of the 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 is an operation diagram of the electromagnetic cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Plate 11 Heat generation layer 12 Through hole 13 Non-heat generation part

Claims (1)

(57) [Scope of request for utility model registration] On the back of 1. A submerged in a container it can not be used in an electromagnetic cooker <br/> is that ceramic plate, the magnetic flux over the entire surface
For an electromagnetic cooker with a heating layer that generates heat due to changes in
In the heat plate, a non-heat-generating portion where no heat generating layer is formed on the back surface of the plate
A heating plate for an electromagnetic cooker that is formed so that the calorific value distribution is uniform .