JP2002313549A - Electromagnetic cooking method and device, and container used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooking method and device, and a container used for the same that heats cooked food, such as in-flight food in an aircraft or hospital food, to a temperature suitable for a meal. SOLUTION: In this electromagnetic cooking method, cooked food cooked and held to a prescribed low temperature is put in a cooked food container formed of a non-electromotive material even if receiving magnetism, and provided with a magnetic electromotive thin foil. The cooked food container is placed on a heating coil which generates high electromagnetic force by high frequency power of prescribed frequency, and the high frequency power is supplied to the heating coil to excite and heat the magnetic electrogenic thin foil to thereby heat the cooked food.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a food heating container to which a magnetic electromotive thin foil such as a metal foil having a property of generating Joule heat by an electromotive force generated by receiving magnetism is printed or printed. In a food heating container formed with a conductive layer having the same electromagnetic properties as a thin foil, the cooked food is cooled to a predetermined temperature, or the cooked food in a frozen state is stored, and high-frequency power supplied by an inverter or the like is supplied. The present invention relates to an electromagnetic cooking method and an apparatus for heating the cooked food to a temperature suitable for eating by causing the magnetoelectric thin foil or the conductive layer to generate and generate heat by a heating coil that generates an electromagnetic force upon receipt.

[0002]

2. Description of the Related Art Thawing, heating or cooking of foods cooked at home, foods cooked in large quantities in food preparation facilities or the like, so-called retort foods, or frozen foods that have been cooked and stored frozen. In the case of carrying out, a means suitable for heating the food is required.

[0003] In addition, a small amount of food immediately before being provided to a meal, such as reheating of a meal prepared at a facility outside the hospital and stored at a low temperature or a school lunch or a company lunch arranged and served, is rapidly heated. Instead, it is necessary to use a disposable container to easily heat the medium or low-speed heating.

As a simple method of heating food, an electromagnetic cooker for business use is most commonly used. However, this electromagnetic cooker has a high output so that it can be cooked by high-speed heating which is not inferior to cooking by gas appliances. You are using an inverter.

[0005] Cooking utensils suitable for the heating means are required, such as an iron pan, an iron frying pan, an iron enamel pan, a three-layer pan including an iron plate, a multi-layer aluminum pan including an iron plate, Alternatively, a stainless steel pot such as 13 chrome or 18 chrome is used.

[0006] A similar heating method is adopted for home-use electromagnetic cookers as described above for business use in large-scale facilities. A home electromagnetic cooker has a maximum capacity of 100 V / 15 A, generally about 1.2 kW, because of the limitation of the home electric capacity.

[0007] The cooking utensils used in this home-use electromagnetic cooker also use iron pots, iron frying pans, iron enamel pots, and the like, as in commercial use. In any case, the cooking utensils used for the electromagnetic cooker use an iron plate having a considerable thickness. Therefore, when such a sturdy cooking appliance is used for home use, there are also problems in use, such as inadvertently baking the pan or red hot state and deforming the pan.

[0008] The present inventor has found that a small amount of cooked food with a small amount of heat is used, such as when cooking food is heated near a meal place or at a place to eat, such as an in-flight meal of an aircraft or a hospital meal. The method of reheating to a temperature suitable for eating the food was examined.

The present inventors have developed a method and an apparatus for heating the cooked food for the following purposes.

A) It does not generate high temperature or smoke like electric heat or gas.

B) Being able to be easily heated to a temperature suitable for eating by using a disposable plastic container or paper container.

C) A hot thing like soup is hot, a warm thing like rice is hot, and a thing like salad or fruit can be heated while being cold.

[0013] D) And the heating must be simple and accurate to the optimum temperature for anyone with a little training. E) Regardless of the type of power supply such as commercial power supply, aircraft power supply, DC power supply, etc. Device that can be used without

The present inventors have determined that heating with an electromagnetic cooker is the most suitable for the purpose in order to achieve the above object.

As described above, conventional cooking utensils used for electromagnetic cooking are made of a ferromagnetic iron plate attracted to a magnet, such as an iron pot or a frying pan, or a composite material containing the iron plate. And those having mechanical strength were used.

Because of this necessity, no method has been proposed in which a disposable container is used and the cooked food contained therein is simply heated using electromagnetic force.

At convenience stores and supermarkets, cooked foods may be provided by heating them in a microwave oven. However, this is not possible because a large amount of cooked foods cannot be heated, the equipment becomes large, and a plurality of properties are displayed on the service tray. There is a problem that it is not possible to heat to the temperature suitable for each food at once with the different foods loaded, and it is not possible to serve while heating in the service cart, etc.This heating method is applied Can not.

In view of the problems of the prior art, it is apparent that a method of heating cooked food using electromagnetic force is suitable. However, there is also a problem with this heating method. That is, a heating element that generates heat by generating an eddy current by an electromagnetic force is provided on the container side, and it is necessary to generate heat by the action of the electromagnetic force to obtain a required amount of heat. Further, it is a problem to be able to provide an inexpensive container which does not pose a problem in terms of price even when used disposably. Still another problem is whether or not a heatable container suitable for mass production can be manufactured.

The present inventors have made a large amount of plastic containers and paper containers available on the market and are conveniently used, and have studied on the assumption that these materials are used as containers. The first task was to find a heating element.

Therefore, the present invention and the like focused on the possibility that a large amount of commercially available aluminum foil could be used as a heating element or a heating sheet, and examined various methods for electromagnetically generating heat.

In this study, aluminum foils having various sizes of 10 μm, 15 μm, 20 μm, and 30 μm each having a side length L of 200 mm were used as samples. And 10
Driven by 0V, 50Hz AC, output 1.2
Using a kW inverter, the generated high-frequency power of 30 kHz is applied to a heating coil having a diameter D of 180 mm to excite it, and a sample of the aluminum foil is placed on the heating coil to confirm the presence or absence of heat generation and the amount of heat generation. A basic experiment was performed.

FIG. 13 is an explanatory view of the state of the aluminum foil 1 of 15 μm showing the results of this experiment. According to the observation of this electromagnetic heating experiment, the aluminum foil 1 as a whole becomes thin and red-hot within several seconds to several tens of seconds after the power is turned on to the inverter. And when a part begins to melt, the missing part 2 in the perforated state
There has occurred. The defective portion 2 is initially in a small area, but expands instantaneously and the aluminum foil melts while being discolored by heat, resulting in a hole.

If a small hole is made in this defective part,
The "edge effect" occurs and the electromagnetic energy is concentrated around the hole, and as a result, the melting speed of the aluminum foil 1 is accelerated and the hole generated by melting is widened, and an electric circuit is finally formed in the aluminum foil. The eddy current stops flowing through the aluminum foil 1 and the heating ends.

In this experiment, it was confirmed that when the eddy current stopped flowing, the aluminum foil 1 did not respond to the electromagnetic field at all. In addition, the missing portion 2 was generated at a radially intermediate point connecting the center portion and the edge portion of the amil wheel 1, and was instantaneously propagated in the radial direction to generate heat and melt.

From the above-described electromagnetic heating experiments, it has been found that a thin metal foil such as an aluminum foil generates heat when an electromagnetic force acts thereon, and there is a delicate balance between the electromagnetic force and the calorific value. It has been confirmed that it has features.

A) If the balance between the thickness of the aluminum foil and the strength of the electromagnetic force is deteriorated, the generated temperature becomes uneven.

B) Then, when the temperature unevenness occurs, the aluminum foil is instantaneously melted, and a perforated defect occurs instantaneously.

C) The holes generated by the melting expand in a short time or instantaneously. However, when the hole is expanded to a certain extent, the heat is stopped automatically due to no influence of the electromagnetic force, and the aluminum foil does not respond to the electromagnetic force at all.

The present invention has been obtained on the basis of the following findings obtained by experiments conducted when an electromagnetic force of high frequency is applied to the aluminum foil.

1) The aluminum foil has a property of generating an electromotive force in response to an electromagnetic field.

2) The electromotive force flows over a required area and generates heat.

3) In addition, some aluminum foils generate heat depending on their thickness, while others do not generate heat at all.

4) It can generate heat at a heat value of 100 W or less.

5) And preferably, heat can be generated by a commercial power supply.

6) To provide an electromagnetic cooking device having a low calorific value of about 20 W to 100 W.

The present invention also provides a simple and inexpensive container which can be adapted for finishing cooking of small-volume cooked food, reheating of cooked and stored food under predetermined conditions. It is an object of the present invention to provide an electromagnetic cooking method and an apparatus using a combination of a heating material and a low-power electromagnetic cooker.

The present inventor has found from the heat generation experiment in which high-frequency electromagnetic force was applied to the aluminum foil that the aluminum foil gently generates heat by the electromagnetic force generated by the heating coil to which high-frequency power was applied. Found that fine adjustment of electromagnetic force was necessary.

Therefore, the present inventors have used various metal thin plates or metal foils, such as aluminum foil or aluminum foil, which are heated by electromagnetic force, as well as conductive thin films and magnetic thin films having the same action as metal thin foils. As a result of studying the relationship between the heat generation state and the amount of heat, the present invention has been achieved.

[0039]

The electromagnetic cooking method and the apparatus according to the present invention are as follows.

1) A cooked food which is cooked and held at a predetermined low temperature is accommodated in a cooked food container made of a material which does not generate an electromagnetism even when it receives magnetism and provided with a magnetoelectric thin foil. The cooking food container is placed on a heating coil that generates a high electromagnetic force by high-frequency power of a predetermined frequency, and high-frequency power is supplied to the heating coil to excite the magnetoelectric thin foil to generate heat. It is characterized by heating food.

2) A cooked food container which is made of a material which does not generate an electromagnetism even when it receives magnetism and which is provided with a magnetoelectric thin foil, and a heating coil which generates a magnetic force by a predetermined high-frequency electric power. An apparatus for arranging the accommodated container on the heating coil and applying high-frequency power to the heating coil to heat the cooked food accommodated in the container, wherein the magnetoelectric thin foil is an aluminum foil. , Copper foil, brass foil, stainless steel foil and the like.

3) A cooking food container provided with a magnetoelectric thin film provided with a material which does not generate an electromotive force even when subjected to magnetism, and a heating coil which generates a magnetic force by a predetermined high-frequency electric power, and accommodates the cooking food. A device for arranging the container on the heating coil and supplying high-frequency power to the heating coil to heat the cooked food contained in the container,
The porcelain electromotive thin film is characterized in that a printed film made of a magnetoelectric material such as carbon or ferrite is formed on the container itself or on a carrier.

4) The magneto-electric thin foil or the porcelain electro-motive thin film receives an electromagnetic force generated by applying a high-frequency power of 26 to 33 kHz to the heating coil from an inverter, and receives an electromagnetic force generated by 0.3 to 2.0 w / w. It is characterized in that it is configured to generate heat with a small amount of heat generation within cm ² .

5) The heating coil is characterized in that a tape-shaped thin metal plate is spirally wound.

6) The heating coil is formed by etching or printing a conductive material formed of a thin metal plate or a metal foil layer.

7) A first electrode for supplying high-frequency power is disposed on a support provided on a service cart, and a second electrode is disposed at an end of a connection to a heating coil disposed on a tray on which tableware is placed. When the tray is placed on the support, the second electrode and the first electrode are connected, and the cooked food in the cooked food container placed on the tray is heated, and the container is placed on the tray. The present invention is characterized in that it is configured to be provided to a meal person in a mounted state.

8) The container according to the present invention is characterized in that a magnetoelectric thin foil is provided at a position of the container which is made of a material which does not generate electromagnetism even when it receives magnetism, at a position closest to the electromagnetic cooking device.

According to the present invention, a food container is formed of a material which does not generate an electromagnetism, for example, plastic or paper, or porcelain, and a thin foil of aluminum foil or copper is formed at a predetermined position, preferably at the bottom of the container. Metal foil, such as brass thin foil,
That is, a thin metal foil having a magnetoelectric property is provided, and high-frequency electromagnetic force is applied to the metal foil to generate heat. In particular, a small amount of cooked food such as a lunch is eaten. The present invention is characterized in that a cooking method for reheating when serving the food, an apparatus used for the method, and a container used for the method are provided.

[0049]

(Embodiment 1) FIG. 1 shows the appearance of a low-output electromagnetic cooker 5 used in the present invention. This electromagnetic cooker 5 operates with AC 100 V of a commercial power supply, and its electric capacity. Is 100 W, and is a continuously variable output from 10 W to 100 W.

A top plate 6 on the upper surface of the electromagnetic cooker 7 is made of a heat-resistant ceramic or the like, and a push button switch 8 for turning on / off the power, a high / low adjustment slide knob 8a for changing the output, and an internal There is provided an LED segment element 9 for electronically incorporating a timer display.

FIG. 2 is a block diagram schematically illustrating an electric configuration of the electromagnetic cooker 7, in which a supplied commercial power supply 1a is converted into a direct current by a converter 1b, and a control circuit and a timer circuit are provided. The frequency is 26 kHz to 33 by the inverter 1c controlled by 1d.
The frequency is converted to a high frequency of kHz, and this high frequency power is supplied to the heating coil 1e, whereby the heating container 1f is heated by electromagnetic induction heating.

FIG. 3 shows a container 10 capable of heating food by the electromagnetic cooker 7. This container 10 is composed of a transparent or translucent polyethylene terephthalate (PET) lid 10a and a container body 10b. . The container body 10b uses cardboard as an outer layer for heat shielding and holding the form as a container, and a PET coating layer or a thin PET sheet as an inner layer for insulating between the cooked product and the paper layer. Are laminated to form a protective layer.

A heating sheet 10c as a heating unit is arranged at the bottom of the container body 10b. The heating sheet 10c has a three-layer structure in this embodiment, and is provided with a silicon-coated cooking paper c in which many small holes are opened in the upper layer so that movement of steam or moisture can be allowed up and down. Gives food peelability.

Then, the pulp cooking sheet b is used for the intermediate layer.
Which has a water content of 100% and does not allow water droplets to drip, prevents moisture from leaking from the food to be heated, and has the property of supplying water to the food as needed. I'm making it.

Further, a 20 μm aluminum foil in the lowermost layer forms a three-piece sheet-like heating element a which is hard to tear, and this heating element a has a particularly important heat-generating function in the present invention.

Since the thin aluminum foil having a thickness of 20 μ is inferior in handleability such that a hole is easily opened or torn, a heat-generating element or a heat-generating element a is formed by stacking three of these pieces. The container placed or affixed to the bottom of the container body 10b is attached to the top plate 6 of the electromagnetic cooker 7 shown in FIG.
The heating coil 1e shown in FIG.
c, a high-frequency electric power is supplied to generate an electromotive force by applying an electromagnetic force, thereby heating the cooked food contained in the container 10. The amount of heat generated by Joule heat in the heating element a is: Very small.

When cooked white rice is put on the container 10 constructed as described above and heated for 15 minutes with an input power of about 30 W, all the rice in each part in the container 10 is heated to 95 ° C. or higher. After performing "Murashi" for about 5 minutes, the persons concerned tried out, and a good texture was obtained. (Embodiment 2) FIG. 4 shows another type of food heating container 12, in which a lid 12a which is a synthetic resin molded product shown in FIG.
And a main body 12b made of paper having a PET layer formed therein, and a heat generating layer 12c having a heat generating pattern formed of copper foil is disposed inside the main body 12b.

The main body 12b made of paper is made of PE
A composite paper obtained by laminating a T film is used, and the composite paper is heated and formed into a rectangular container, and is combined with a lid 12a formed of a transparent PET resin.

FIG. 5 is an exploded view showing the structure of the bottom of the main body 12b and the heat generating layer 12c. The heat generating layer 12c is laid on the bottom of the main body 12b of a paper container having a thickness of 100 μm.

The heat generating layer 12c is formed by laminating a 30 μm PET film d serving as a support member of the heat generating pattern e and a 15 μm copper foil on the PET sheet d, and forming the lowermost layer. And a three-layer structure of a 30 μm PET film f laminated as a protective layer on the heat generating pattern e to form a thin flexible sheet. The overall thickness is a thin sheet-like heating element having a thickness of about 75 μm, which is attached to the bottom of the main body 12b.

In this embodiment, a copper foil of 15 μm is used as the heating element, but an aluminum foil, a stainless steel foil or the like may be used as described above. (Embodiment 3) FIG. 6 shows a structure in which an electromagnetic cooking device for heating is assembled to a service cart 14 in order to enhance the convenience of feeding.

The inverter 15 of the electromagnetic cooker is mounted on the upper part of the frame 14 a of the service cart 14.
The support members 17 for supporting the serving tray 18 are arranged in multiple stages inside a, and the electrodes 17a, 1a, 1b,
7b is provided.

As shown in FIG. 6B, the tray 18 is provided with a heating coil 19 on the surface thereof and the electrode 1
9a is fixed to the periphery of the tray 18. When the tray 18 is placed on the support 17 of the service cart 14 and pushed in, the electrodes 18a and 17b on the side of the frame 14a are in pantograph contact to form an electric circuit. (Cooking product heating container and tray) Tray 18 for serving food
The container for holding the cooked food to be placed thereon may be one in which a heating element such as aluminum foil a is simply spread on the bottom of the container body 10b as shown in FIG. One having a structure in which a heat generating layer 12c having a pattern is integrally attached can be used.

The containers 10 and 12 are placed on heating coils C1 to C3 provided on the tray 18 as shown in FIG. 9, and only the portions where the heating coils C1 to C3 exist are accommodated in the containers 10 and 12. Cooked food can be heated. The number of turns and the size of the heating coil are designed so that heating suitable for the heating temperature of the cooked food can be performed.

FIG. 7 shows a heating coil 19A having a coil 21 wound around a bobbin 20 fitted and fixed in a concave portion 18a formed on an upper portion of a serving tray 18.
A terminal 19a is drawn out and fixed to the peripheral edge of the tray 18 as shown in FIG. 6B or FIG.

FIG. 8 shows a substrate-type heating coil 19B fitted and fixed in a concave portion 18a formed on the serving tray 18. This substrate type heating coil 19B
Is a heat-generating pattern 23 formed on a glass epoxy substrate 22 with a thick copper foil to reduce the thickness.

The heating coil 19B is formed by laminating and adhering a copper foil 23 having a thickness of 300 μm on the upper and lower surfaces of a glass epoxy substrate 22 and etching it into a spiral coil in the same direction as the upper and lower sides to form a heating coil pattern. Then, the two patterns are connected by a through hole at the center to double the magnetic field lines. Then, the epoxy coating film 22a is formed as a protective layer. This heating coil 19B is placed in tray 1
8 can be fitted into the concave portion 18a formed therein, fixed with an adhesive, and assembled.

FIG. 9 shows an embodiment using the heating coils 19A and 19B shown in FIG. 7 or FIG. 8 on a heating tray 18. Formed on the tray 18 with litz wire,
The three heating coils C1, C2, and C3 having a heating area and a heating value according to the shape of the container are fixed at predetermined positions, and the three heating coils and the electrode 1 at the edge of the tray 18 are fixed.
9a is wired with a litz wire. (Embodiment 4) FIGS. 10A and 10B show a heating container 25 made of reinforced porcelain. FIG. 10A is a perspective view of the container, FIG. 10B is a cross-sectional view of the center, and FIG. Each figure is shown.

In this embodiment, a heating vessel 25 made of reinforced porcelain is used.
A heat generating layer 26 is formed by printing a predetermined heat generating pattern with a carbon-based conductor on a portion surrounded by a square by the thread cutting of the bottom 25a, drying and baking it. The heat generating layer 26 of this printing structure has characteristics that it has good adhesion to the bottom portion 25a, which is a porcelain material, and that the temperature rise characteristics are improved. (Embodiment 5) FIG. 11 shows a heating container 27 in which thick aluminum foil is formed into the shape of a lunch box, and as shown in the sectional view of FIG. To prevent this, a fluorine resin coating layer 27b is formed. The heating container 27 having this structure is easily placed on a heating coil provided on the tray 18 as shown in FIG. 9 and heated to a predetermined temperature by supplying high-frequency power obtained by an inverter. be able to.

It is also possible to use a material in which a treatment layer is formed so that aluminum metal molecules do not migrate to the food material side, or a material obtained by laminating and bonding aluminum hydroxide inorganic paper 27c on aluminum foil 27a. it can. (Embodiment 6) FIG. 12 shows a heating vessel 28 finished in a circular shape by using a 50 μm thick aluminum foil. As shown in FIG. 12B, a silicon coat layer 28 is formed on the aluminum foil 28a.
The b is formed to prevent adhesion between the food material and the aluminum foil, or to prevent aluminum metal molecules from migrating to the food material side. (State of Heat Generation of Metal Foil) The basic idea of the present invention is to generate heat by using a metal foil such as an aluminum foil or a copper foil as a heating element.
It receives low-output high-frequency energy using a μ or even 100 μ to generate a small amount of heat. Thickness of 10μ or less or 100μ or more
It cannot generate heat by electromagnetic force and is therefore unsuitable for use as a heating element.

Next, an inverter (10
A description will be given of a heat-generating state (reaction state) when high-frequency energy obtained at 0 V, 1.2 kW, and 30 kHz is applied via a heating coil formed of a litz wire.

1) It has been confirmed that aluminum foil having a thickness of 10 to 100 μ generates heat in a magnetic field by high-frequency power.

When the thickness is less than 10 μm, the strength is extremely weak, the handling is poor, and the calorific value is small. Also, 100μ
When the thickness exceeds 200, it has been confirmed that it does not respond to magnetism and gradually becomes difficult to generate heat.

Therefore, when using an aluminum foil as a heat generating material, it is preferable to select and use a material having a thickness of 20 μm to 80 μm.

2) Similarly, when an experiment was conducted on the state of heat generation due to a high-frequency magnetic field using a copper foil, one having a thickness of 10 to 40 μ generated heat in response to high-frequency power, while one having a thickness of 60 μ generated heat more than expected. It has been confirmed that those having a size of 80 μm or more do not generate heat at all.

3) When a similar heat-generating experiment was performed using a brass foil, a heat-generating material of 10 μm did not generate heat,
Those having a range of 0 μm can generate heat to such an extent that they can be used as heating elements. Those having a thickness of 100 μ or more do not react at all with high-frequency magnetism and do not generate heat.

4) When a similar heat-generating experiment was performed using a stainless steel foil, a heat-generating material of 10 μm did not generate heat.
It has been confirmed that a material having a range of μ to 80 μ generates heat, and a material having a thickness in this range can be used as a heat generating material.

5) After a carbon-based coating layer 26 was formed on the bottom of the heating vessel 25 made of reinforced porcelain shown in FIG. 10 by printing, it was dried and baked to form a heating element. In this heat generating layer, the heat value changes depending on the amount of carbon contained in the paint and the thickness of the coating film, and needs to be determined by a number of experiments.

[0079]

According to the present invention, there is provided a container for cooked food made of a material which does not generate electromagnetism even if it is subjected to magnetism. A printed film is formed, the cooked food container is placed on a heating coil that generates a high electromagnetic force by high-frequency power of a predetermined frequency, and high-frequency power is supplied to the heating coil to produce the magneto-electric thin film. The present invention is characterized in that the cooked food in the container is heated by exciting the foil to generate heat.

Therefore, according to the present invention, the cooked food is put in the disposable tableware, and the processed food is heated by applying a high-frequency electromagnetic force to the cooked food. Can be easily warmed foods processed in large quantities. In particular, the present invention can be effectively used for in-flight meals, hospital meals, school and factory meals, and the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an electromagnetic cooker.

FIG. 2 is a flowchart of an electromagnetic cooker.

FIG. 3A is a cross-sectional view of a food heating container according to an embodiment of the present invention, and FIG. 3B is an exploded view showing a configuration of a heating unit.

FIG. 4A is a sectional view of a food heating container according to an embodiment of the present invention, and FIG. 4B is a perspective view showing a heat generation pattern.

FIG. 5 is an exploded explanatory view showing the structure of the heating body of FIG. 4;

6A is a side view of a service cart, and FIG. 6B is a perspective view of a tray.

FIG. 7 is a cross-sectional view of a wire-type heating coil provided on a tray.

FIG. 8 is a sectional view of a substrate-type heating coil provided on a tray.

FIG. 9 is a perspective view of a tray provided with a plurality of heating coils.

10A is a perspective view of a food heating container using reinforced porcelain, FIG. 10B is a sectional view of the same, and FIG. 10C is a bottom view.

FIG. 11A is a perspective view of a food heating container using thick aluminum foil, and FIGS. 11B and 11C are cross-sectional views showing constituent members of the container.

12A is a perspective view of a food heating container using a thick aluminum foil, and FIG. 12B is a cross-sectional view showing constituent members of the container.

FIG. 13 is a perspective view showing a defective state when an electromagnetic force is applied to an aluminum foil.

[Explanation of symbols]

10 Food heating container 10a Lid 10b
Container body 10c Heating sheet a Heating element b Pulp cooking sheet c Silicon coat cooking paper 12 Food heating container 12a Lid 12b Container body 12c Heating unit 14 Service cart 14a
Frame 15 Inverter 17 Support 17a, 17
b electrode 18 tray 19 heating coil 19a electrode 19A winding type heating coil 19B substrate type heating coil

────────────────────────────────────────────────── ─── of the front page continued (51) Int.Cl. ⁷ identification mark FI theme Court Bu (reference) B65D 81/34 B65D 81/34 W // A61G 12/00 A61G 12/00 D (72) inventor Yasuhiro Asai 1F F-term (reference) 1-8 Ibukino, Midori-ku, Yokohama-shi, Kanagawa 3B001 AA40 BB10 CC40 3K051 AA08 AB04 AB09 AC12 AD13 AD39 CD43 CD44 4B055 AA09 AA16 AA29 BA24 BA34 BA38 BA39 CA03 CA76 DA02 EA04 EA05 FB54 FC07 FC33 FC06 FC33 FE03 GC17 GC24 GD01 4C341 LL01

Claims (8)

[Claims] 1. A material which does not generate an electromotive force even when subjected to magnetism,
A cooked food that is cooked and held at a predetermined low temperature is stored in a cooked food container provided with a magnetoelectric thin foil, and the cooked food container generates a high electromagnetic force by high-frequency power of a predetermined frequency. A high frequency power is supplied to the heating coil to excite the magnetoelectric thin foil to generate heat so as to heat the cooked food. 2. It is made of a material which does not generate an electromotive force even when it receives magnetism.
A cooked food container provided with a magnetoelectric thin foil, and a heating coil that generates a magnetic force by a predetermined high-frequency power, the container containing the cooked food is arranged on the heating coil, and the heating coil A device for supplying cooked food contained in this container by supplying high-frequency power, wherein the magnetoelectric thin foil is a metal foil such as an aluminum foil, a copper foil, a brass foil, and a stainless steel foil. An electromagnetic cooking device characterized by the following. 3. It is made of a material which does not generate an electromotive force even when it receives magnetism,
A cooking food container provided with a magnetoelectric thin film, and a heating coil that generates a magnetic force by a predetermined high-frequency power, the container containing the cooking food is arranged on the heating coil, and a high-frequency An apparatus for supplying electric power to heat cooked food contained in the container, wherein the porcelain electromotive thin film is made of a magnetoelectric material such as carbon or ferrite on the container itself or on a carrier. An electromagnetic cooking device having a printed film formed thereon. 4. The magnetoelectric thin foil or the porcelain electromotive thin film receives a high frequency power of 28 to 35 kHz from an inverter or an electromagnetic force generated by being applied to a heating coil.
The electromagnetic cooking device according to claim 2 or 3, wherein the electromagnetic cooking device is configured to generate heat with a minute heat value within 3 to 2,0 w / cm ² . 5. The electromagnetic cooking device according to claim 2, wherein the heating coil is formed by spirally winding a tape-shaped thin metal plate. 6. The electromagnetic cooking apparatus according to claim 2, wherein the heating coil is formed by etching or printing a conductive material formed of a thin metal plate or a metal foil layer. 7. A first electrode for supplying high-frequency power is disposed on a support provided on a service cart, and a second electrode is disposed at an end of connection to a heating coil disposed on a tray. When placed on the support, the second electrode and the first electrode are connected, and the cooked food in the cooked food container placed on the tray is heated, and the container is placed on the tray. An electromagnetic cooking device configured to be provided to a meal person. 8. A container applicable to electromagnetic cooking in which a magnetoelectric thin foil is provided at a position closest to an electromagnetic cooking device of a container made of a material which does not generate electricity even if it receives magnetism.