JP2003250698A - Electromagnetic cooking container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic cooking container, capable of easily coping with increase in the output of an electromagnetic cooker without fusing failure or the like, and eliminating the problem in local heating, and smoothly heating cooked material and soup in an earthen pot. <P>SOLUTION: This electromagnetic cooking container includes a container body 1, which is a vessel whose upper surface is opened and is made of ceramics for storing cooked material 7 and soup 6, and a heating plate 3 placed on the inside base 10a of the container body 1, in which the container body 1 is placed on the electromagnetic cooker 5 to generate heat with generation of magnetic field of the electromagnetic cooker 5. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic cooking container used for an electromagnetic cooker.

[0002]

2. Description of the Related Art Induction cookers have become popular in general households in recent years because they are highly safe without burning and are easy to clean and produce a small radiant heat and a comfortable cooking environment. Here, pots made of iron, iron enamel, stainless steel, etc. are generally used in electromagnetic cookers, but pots of earthenware are still preferred for dishes called pot dishes. However, since the clay pot cannot be used as an electromagnetic cooking container as it is, conventionally, for example, as shown in FIG. 6, a metal thin film 92 mainly composed of silver or the like is fixed to the bottom outer surface 91 of the clay pot body 9 by thermal spraying or the like. (Japanese Utility Model Publication No. 59-11436, JP-A-7-
6870). Further, depending on the case, a metal thin film 92 having a protective coating such as glass has been used. The principle of the electromagnetic cooker is that this clay pot is an electromagnetic cooker 5
When placed on the top plate 51 of the above and the power is turned on, a magnetic field is generated in the induction coil 52, and the thin film 92 on the bottom of the clay pot placed in the magnetic field.
The Joule heat generated by the eddy current is generated by the flow of the magnetic field lines 53 to heat the ingredients 7 and the soup 5 in the clay pot through the clay pot body 9.

[0003]

However, the electromagnetic cooking container made of ceramics such as the clay pot has the following problems. First, the coefficient of thermal expansion of the thin metal film 92 made of silver or the like is greatly different from the coefficient of thermal expansion of the clay pot body 9, and there is a problem that the thin film 92 is peeled off during use or the metallic thin film 92 melts and becomes unusable. It was Secondly, the output of the electromagnetic cooker 5 tends to increase and become large in capacity, and the above-described fusing failure is more likely to occur. Even if it does not become a problem at about 1500 W for desktop use, if the output exceeds 2000 W, defective melting tends to occur and it becomes more difficult to take measures. Further 200V
As commercialization of the voltage-compatible electromagnetic cooker 5 progresses, its solution has become more difficult. Thirdly, when the power of the electromagnetic cooker 5 is turned on, the metal thin film 92 in the contact portion with the top plate 51 becomes a heating plate to quickly raise the temperature, but only the bottom portion of the earthen pot rises abnormally. There was a problem that the cooked food was burnt. Furthermore, once kogation occurs, there is a problem of local heating in which heat conduction is deteriorated and the place where the kogation is gradually raised. Fourth, since the heating thin film 92 is provided on the outer surface 91 of the bottom of the clay pot, it takes time to heat the ingredients 7 and the soup 6 in the clay pot because the thermal conductivity of the clay pot itself made of ceramic material is small. It was hanging. Finish heating,
The advantage of the heat retention characteristic of the clay pot that it is difficult to cool the warmed food is that it takes more time in the step of heating the ingredients 7 and soup 6, which leads to a drawback that the thermal efficiency is lower than that of a stainless steel pot. .

The present invention solves the above problems, and can easily cope with the increase of the output of the electromagnetic cooker without falling into the melting failure, solve the problem of local heating, and smooth the ingredients and soup in the clay pot. It is an object of the present invention to provide an electromagnetic cooking container that can be heated and raised.

[0005]

[Means for Solving the Problems] In order to achieve the above object,
The gist of the invention according to claim 1 is a container body (1) made of ceramics, which can be used as a container with an opening on the top surface to store ingredients and soup.
And a heating plate (3) which is placed on the inner bottom surface of the container body, and which is placed on the electromagnetic cooker and can generate heat when the magnetic field of the electromagnetic cooker is generated. It is in a container for electromagnetic cooking. According to a second aspect of the present invention, there is provided an electromagnetic cooking container according to the first aspect, wherein the thickness of the bottom of the container body is in the range of 2 mm to 10 mm, and the heating plate can be removably mounted on the container body. It is characterized by being a perforated plate or a net-like body formed by forming a plurality of through holes. Here, "the thickness of the bottom of the container body is 2 m
The "range of m to 10 mm" means that at least the thickness of the bottom portion on which the heating plate is placed is in the range of 2 mm to 10 mm, and does not reach the entire thickness of the bottom portion in the range of 2 mm to 10 mm.

According to the first aspect of the present invention, the heating plate is placed on the inner bottom surface of the ceramic container body, and the container body is placed on the electromagnetic cooker to generate the magnetic field of the electromagnetic cooker. When the plate is designed to generate heat, the heat of the heating plate directly heats the ingredients and soup in the container body, so that it can be boiled quickly. Since it is not necessary to pass through the bottom of the container body where heat transfer is difficult unlike the conventional product, the thermal efficiency is improved. Since the soup is surrounded by the heating plate that becomes a heating element, the ingredients and the entire soup can be heated uniformly without local heating. The heating plate only needs to be placed on the inner bottom surface of the container body, and since it is not necessary to integrate the heating plate and the container body, there is no problem of peeling or fusing. According to claim 2, the thickness of the bottom of the container body is 2
If it is in the range of 10 mm to 10 mm, the magnetic lines of force of the electromagnetic cooker can easily reach the heating plate, and stable electromagnetic cooking can be performed. Also, if multiple through holes are formed in the heating plate, even if the soup is boiled and bubbles come out from the bottom of the pan, it will pass through the through holes and escape to the top of the soup, so the heating plate does not move or slip. ..

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The electromagnetic cooking container according to the present invention will be described in detail below. 1 to 5 show an embodiment of an electromagnetic cooking container of the present invention, FIG. 1 is an exploded perspective view thereof, and FIG. 2 is a longitudinal sectional view showing a state in which ingredients and soup are put in a container body and put on an electromagnetic cooker, 3 and 4 are vertical cross-sectional views of another embodiment of the electromagnetic cooking container, and FIG. 5 is a partial plan view showing another embodiment of the electromagnetic cooking container in which the heating plate is locked to the container body.

The electromagnetic cooking container comprises a container body 1, a lid 2 and a heating plate 3. In this embodiment, a clay pot body is applied to the container body 1 related to the electromagnetic cooking container. The earthen pot main body 1 is a ceramic product that can be opened on the top surface to accommodate the ingredients 7 and the soup 6. It is a pottery made of earth-burning heat-resistant earthenware that contains the petalite (lithium feldspar) component. The earthenware pot main body 1 has a flat bottom, and the thickness t of the bottom portion 10 is 2 mm to 10 mm.
The range is 2 mm to 6 mm, and preferably 2 mm to 6 mm. If it is larger than these ranges, it becomes difficult to place the heating plate 3 in the magnetic field lines 53 that are far from each other even if the electromagnetic cooking container is placed on the top plate 51 of the electromagnetic cooker 5 and the power is turned on. On the other hand, if it is smaller than the above range, the clay pot main body 1 is easily broken by an external impact force, and it becomes difficult to secure the mechanical strength. In the clay pot body 1, the outer bottom surface 10b is flattened so that the heating plate 3 can easily enter the magnetic field lines 53, and the inner bottom surface 10a is also flattened on the portion on which the heating plate 3 is placed. The lid 2 covers and closes the upper opening of the clay pot body 1. Reference numeral 21
Indicates a steam (or gas) vent hole.

The heating plate 3 is placed on the inner bottom surface 10a of the earthen pot main body 1, and the earthenware pot main body 1 is placed on the electromagnetic cooker 5 so as to generate heat when the magnetic field of the electromagnetic cooker 5 is generated. It is a state. Place the heating plate 3 into the clay pot 1
When these are placed on the inner bottom surface and placed on the electromagnetic cooker 5 and an electric current is passed through the coil 52, magnetic force lines 53 are generated, and an eddy current is induced in the heating plate 3 placed in the magnetic field. This eddy current generates Joule heat according to the specific resistance of the heating plate 3, and the ingredients 7, soup 6 poured into the clay pot body 1
To heat. The heating plate 3 is made of a metal product that can generate heat when the magnetic field of the electromagnetic cooker 5 is generated. The metal product here includes an alloy or a composite product that has been coated with a fluororesin coating or the like. Let's assume.
The main part of the heating plate 3 is made of a conductive material, for example, a metal such as iron, nickel, cobalt, or an alloy containing these metals. A thin plate made of stainless steel is used as the heating plate 3 here.

The heating plate 3 can be detachably mounted on the inner bottom surface 10a of the clay pot body 1. A plurality of through holes 31 are provided in the heating plate 3 of this embodiment.
Since the heating plate 3 is placed on the inner bottom surface 10a of the clay pot main body 1, the bubbles 8 coming out from the bottom of the pot when the ingredients 7 and the soup 6 are boiled can be escaped through the through holes 31.
The size of the through hole 31 is 4 m so that the chopsticks are not easily caught in the through hole 31.
It is preferably m or less. The heating plate 3 forming the through holes 31 may be formed of a perforated plate in which a plurality of through holes 31 are formed in a plate body, or a net-like body having a large number of through holes 31 (a mesh net or the like). In addition, in order to make the heating plate 3 easy to understand in each drawing, the plate thickness is drawn thick for convenience. However, the heating plate 3 may be a thin plate if an eddy current is generated and the heating plate 3 can generate heat.

The heating plate 3 may be simply placed on the bottom of the pan as shown in FIG. 2, but as shown in FIG. 3, a recess 101 is formed in the place where the heating plate 3 is placed, and this recess 101 is formed. It is desirable that the heating plate 3 is stably installed so as not to be laterally displaced. Further, as shown in FIGS. 4 and 5, a locking projection 17 is provided on the inner surface of the side wall 11 of the clay pot body 1, and the peripheral edge portion 32 of the heating plate 3 is locked to the projection 17 so that the clay pot body 1
If the device for preventing the positional deviation of the heating plate 3 placed inside is provided, the heating plate 3 is stably fixed, which is more preferable. Even if the soup 6 is boiled and bubbles 8 and the like come out from the bottom of the pot, the protrusion 17 can surely prevent the heating plate 3 from moving. In FIG. 4, the elastic deformation of the heating plate 3 is utilized to fit and lock under the protrusion 17. Figure 4
The heating plate 3 has a dish shape along the inner bottom surface 10 a of the clay pot body 1 and the inner surface of the side wall 11. Further, in FIG. 5, the notch 34 of the heating plate 3 is passed through the protrusions 17 as shown in FIG.
It is placed on the inner bottom surface 10a, then rotated as shown by the arrow in the figure to the (b) state, and the projection 17 protruding from the earthenware pot main body 1 above it is locked and set.

By the way, the heating plate 3 according to the present invention
Is the diameter L of the magnetic force generation area of the electromagnetic cooker 5.₁Same as
The magnetic field of the induction coil 52 extends
Diameter L of magnetic force generation area₁Better to set larger
It will be improved (Fig. 3). Diameter L of magnetic force generation area₁Greater than
The part of the heating plate 3 that has become
Since the force line 53 does not extend, the heating plate 3 is
There seems to be no point in doing it. By the way
Is heated on the inner bottom surface 10a of the clay pot body 1 as in the present invention.
When the heating plate 3 is placed, the heating plate 3
Is submerged in ingredient 7 and soup 6. Current in coil 52
Flows and the magnetic force generation area diameter L₁For heating
When only Joule heat is generated
Is the heating plate 3 made of metal and having good heat conduction?
The diameter L of the magnetic field ₁For heating that is larger than
The heat is immediately transmitted to the plate part α, and the heating play is performed.
The whole 3 becomes a heating element and warms ingredients 7 and soup 6 quickly
You can On the other hand, in the conventional product (see FIG. 6), metal
The thin film 92 is made to have a diameter L of the magnetic force generation region.₁Larger and porcelain
Even if the heat is transferred to the outer periphery of the thin film that the force lines 53 do not reach,
Heat is transmitted in the bottom thickness of the clay pot body 1 with small conductivity,
After this, ingredients 7 and soup 6 must be heated
Does not speed up.

The electromagnetic cooking container constructed in this manner is similar to the conventional electromagnetic cooking container in that the bottom outer surface 91 of the clay pot main body 1 is formed.
The heating plate 3 does not need to be fixed to the earthenware pot body 1
Since it suffices to simply place it on the plate, there is no problem of peeling or fusing due to the difference in the coefficient of thermal expansion between the heating plate 3 and the clay pot body 1. When the electromagnetic cooking container is used, the heating plate 3 is placed on the inner bottom surface 10a of the clay pot main body 1, and the heating plate 3 can be removed and washed after use, which is also sanitary. Fluorine resin coating or the like as a measure against kogation can be easily applied to the heating plate 3.
In the conventional product, the increase in the output capacity of the electromagnetic cooker 5 is liable to cause fusing failure and the like, and it has been difficult to cope with the problem. However, the heating plate 3 having a simple plate-shaped structure separate from the clay pot body 1 has a poor fusing. There is no such problem. Output is 2000
Even if the voltage exceeds W, there is no structural problem in using a voltage of 200 V for commercial use. The electromagnetic clay pot of the present invention has a simple structure and is durable against failure.

Further, in the conventional product, there is a problem that the bottom portion 90 of the earthenware pot resists the heat transfer and the temperature of the bottom portion rises abnormally. However, in this electromagnetic cooking container, the heating plate 3 for the heating element is used.
Since the ingredients are in the ingredients 7 and soup 6, the abnormal temperature rise does not occur. Then, the heating plate 3 is brought into direct contact with the ingredients 7 and the soup 6 to be heated to quickly raise the temperature. Since the soup 6 surrounding the heating plate 3 is heated by the entire heating plate 3, the problem of local heating in which the temperature rises rapidly once burnt is eliminated. further,
In the conventional product, the thin film 92 on the outer surface 91 of the bottom of the clay pot serves as a heating source, and the ingredients 7, via the bottom 90 of the clay pot with low thermal conductivity,
It took a lot of time to simmer the soup 6 to heat it, but this electromagnetic cooking container directly heats the ingredients 7 and soup 6 without interposing the earthenware pot bottom portion 10. It doesn't take long to boil 6. And
The soup 6 or the like that has been boiled once is protected by the earthenware pot body 1 having low conductivity, that is, good heat retention, so that it is hard to cool. In addition, since the metal heating plate 3 has high thermal conductivity, the Joule heat due to the eddy current is not limited to the portion of the heating plate 3 corresponding to the diameter L ₁ of the magnetic force generation region, and the diameter of the magnetic force generation region is not limited to this. Since it is transmitted to the larger heating plate portion α and can be used as a heating source, the time for boiling the ingredients 7 and the soup 6 can be further shortened by increasing the area of the heating plate 3. In order to place the heating plate 3 on the inner bottom surface 10a of the clay pot body 1, bubbles 8 rising from the bottom of the pot when the soup 6 or the like is boiled up may raise a problem that the heating plate 3 is lifted. 8 on the plate 3
This can be easily eliminated by providing the through hole 31 for the escape route. Further, when the heating plate 3 is locked and set on the protrusion 17, the ingredients 7 do not dive under the heating plate 3 and the heating plate 3 does not move with chopsticks, resulting in excellent usability. .

The present invention is not limited to those shown in the above embodiment, but can be variously modified within the scope of the present invention depending on the purpose and application. Earthenware pot body 1, lid 2, heating plate 3,
The shape, size, etc., of these materials, etc., can be appropriately selected according to the application. For example, in the embodiment, the container main body related to the electromagnetic cooking container is the clay pot main body 1, but the container main body is not limited to this, and may be, for example, a bowl-shaped container made of ceramics.

[0016]

As described above, the electromagnetic cooking container of the present invention can cope with the increase in the output of the electromagnetic cooker without falling into a melting failure and the like, and also solves the problem of local heating so that the inside of the clay pot It has excellent effects such as heating ingredients and soup quickly.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of an electromagnetic cooking container of the present invention.

FIG. 2 is a vertical cross-sectional view showing a state in which ingredients and soup are put in a clay pot body and placed on an electromagnetic cooker.

FIG. 3 is a vertical cross-sectional view of another embodiment of the electromagnetic cooking container.

FIG. 4 is a vertical cross-sectional view of another embodiment of the electromagnetic cooking container.

FIG. 5 is a partial plan view showing how the heating plate is locked to the clay pot body in the electromagnetic cooking container of another embodiment.

FIG. 6 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

1 clay pot body (container body) 10 bottom 10a inner bottom 3 Heating plate 5 electromagnetic cooker 6 soup 7 ingredients t Bottom thickness

Claims (2)

[Claims] 1. A container main body (1) made of porcelain which can be used as a container with an opening on the top surface and can accommodate ingredients and soup, and an inner bottom surface of the container main body, which is placed on an electromagnetic cooker and is electromagnetically coupled. An electromagnetic cooking container, comprising: a heating plate (3) capable of generating heat when a magnetic field of a cooking device is generated. 2. The bottom of the container body has a thickness of 2 mm to 1
The electromagnetic cooking container according to claim 1, wherein the heating plate is a perforated plate or a mesh body having a plurality of through holes formed in a range of 0 mm so that the heating plate can be removably placed on the container body.