KR100656889B1 - Oven for induction heating rice cooker and manufacturing method of thereof - Google Patents

Abstract

An inner container of an induction heating rice cooker and a manufacturing method thereof are provided to cut down manufacturing cost, to increase productivity, and to improve heat efficiency by making the inner container of aluminum and forming a magnetic layer with an anticorrosive layer at part generating the electron induction. An inner coating layer(120) is formed in an inner container(110) in an inner container part(100) of an induction heating rice cooker so as to prevent food from being stuck into the inner container, and a lower heating unit(130) is formed in a contact portion of a coil heating unit in a lower part of the inner container part. A magnetic layer(160) is bonded to the lower heating unit by melting and injecting aluminum, aluminum bronze or nickel with an adhesive layer(150), and an anticorrosive layer(170) is formed outside the magnetic layer to prevent corrosion. The heat efficiency is improved by making the inner container of lightweight and high heat conductivity aluminum.

Description

Oven for Induction Heating Rice Cooker and Manufacturing Method of Thereof}

1 is a cross-sectional view showing the inner pot for the electromagnetic induction cooker of the prior art.

Figure 2 is an exemplary view showing a method for producing the inner pot for the electromagnetic induction cooker of the prior art.

Figure 3 is a cross-sectional view showing a coating inner pot for an electromagnetic induction cooker of the prior art.

Figure 4 is a perspective view showing the inner pot for electromagnetic induction cooker according to the present invention.

Figure 5 is a cross-sectional view showing the inner pot for electromagnetic induction cooker according to the present invention.

Figure 6 is a cross-sectional view showing another embodiment of the inner pot for electromagnetic induction cooker according to the present invention.

Figure 7 is a cross-sectional view showing another embodiment of the inner pot for electromagnetic induction cooker according to the present invention.

Figure 8 is a block diagram showing a state in which the inner pot for electromagnetic induction cooker according to the present invention is installed.

Figure 9 is a process chart showing the inner pot manufacturing method for an electromagnetic induction cooker according to the present invention.

10 is an exemplary view showing an inner pot manufacturing method for an electromagnetic induction cooker according to the present invention.

* Explanation of symbols for main parts of drawings *

100: inner pot 110: inner pot container

120: inner coating layer 130: lower heating portion

140: heating groove 150: adhesive layer

160: magnetic layer 170: corrosion protection layer

180: thermal conductive layer

The present invention relates to an inner pot for an electromagnetic induction cooker.

In general, electric rice cooker (電氣 保溫-, electric rice cooker) refers to a pot that automatically cooks rice by converting electrical energy into thermal energy.

The heating method of electric rice cooker can be divided into heat plate type and induction heating method. In the case of the hot plate type, there is a hot plate to supply heat inside the rice cooker, and there is an inner pot to hold water on the hot plate. When cooking, fill the inner pot with rice and proper water, close the lid, and operate the switch. As soon as the switch is activated, the heater is energized and the hot plate is heated, and the heat from the heated hot plate is transferred to the inner pot so that the temperature in the inner pot rises to 100 ° C and the rice boils. After that, the temperature of boiling water in the inner pot rises further to reach a certain temperature (about 120 ℃), and after a certain time, the switch automatically increases and the cooking process is completed. And the heating heater installed on the side and the lid of the rice cooker starts to heat and start warming.

In addition, in the electromagnetic induction method, when a current is sent to the coil formed in the heating part to be heated, a magnetic force line of the coil is generated, and when the magnetic force line passes through the lower part of the container formed at the upper part, the resistance component (iron component) contained in the material in the container As the eddy current occurs, the generated eddy current heats only the container, so that induction heating occurs that heat is not delivered to other parts except the container, and only the container heats up. It is safe to stop and heats only the container part, which saves electricity due to its high energy efficiency.

As described above, the rice cooker using the electromagnetic induction method is formed in the inner pot is heated rice is placed in the inner pot to wrap the copper coil on the side of the inner pot and send a strong current to form a magnetic line around the coil to heat the entire inner pot The whole pot is heated so that every grain of rice is cooked evenly so that it can make shiny and delicious rice.

Such, the inner pot for the electromagnetic induction pressure cooker of the prior art that is directly heated in the interior of the electromagnetic induction cooker bar as shown in Figures 1 and 2, with reference to this as follows.

The inner pot container 10 mounted inside the electromagnetic induction cooker is not necessarily a magnetic material to be heated by the induction heating type, but is made of a conductive material so that an induced current can be generated in an electric field generated in a coil. The inner pot container 10 is made of an outer layer member 14 made of iron-based metals such as stainless steel and the inner layer member 12 made of non-ferrous metals such as aluminum having excellent heat transfer and light weight to prevent corrosion.

In addition, the inner layer member 12 is coated so that the food does not stick to the portion in direct contact with the food.

In the method of manufacturing the inner container configured as described above, first, an inner layer member 12 is prepared from a stainless steel-based second metal plate M2 constituting an aluminum-based first metal plate M1 and an outer layer member 14. .

As described above, the inner layer member 12 and the outer layer member 14 are made of different kinds of metals, and the upper part of the first metal plate M1 and the second metal plate M2 so that heat transfer can be effectively transmitted. The first metal plate M1 and the second metal plate M2 are integrally formed by rolling at a high pressure using a rolling facility including a roller 20 and a lower roller 22.

The first metal plate M1 and the second metal plate M2 rolled as described above are processed into a circular plate P forming the inner layer member 12 and the outer layer member 14, and have the same shape as the inner pot shape. The upper mold 25 and the lower mold 26 formed are compressed to a proper pressure, and then formed into an inner pot container and then taken out.

However, stainless steels having excellent corrosion protection in iron-based metals are made of an outer layer member made of a conductive material so that an induced current can be generated in an electric field generated in a coil outside of an inner layer member made of a non-ferrous metal such as aluminum having excellent heat transfer and light weight. However, the thermal conductivity of the stainless steel is significantly reduced, the heat generated in the eddy current caused by the induced current is not a good heat transfer in the outer layer member has a problem that heat loss occurs.

Thus, recently, the coating inner pot for electro-induction cooker plated outside to improve the thermal conductivity of stainless bar is disclosed, looking at this with reference to FIG.

The inner pot container 10 that is electromagnetically induced and cooked by the coil heating unit 2 in the inside of the rice cooker has excellent thermal conductivity and is caused by contact of food cooked inside the inner layer member 12 formed of aluminum, which is a light material. The inner layer 11 is formed to prevent contamination, and the outer layer member formed of stainless steel is formed of a conductive material having excellent corrosion resistance so as to dissipate heat in the induction of the magnetic material from the coil heating unit 2 to the outside of the inner layer member 12 ( 14) and the outer coating layer 15 formed of a brass plating layer 15a and a golden plating layer 15b, which are materials for improving thermal conductivity to the outside of the outer layer member 14.

As described above, in order to improve the thermal conductivity of the stainless steel outer layer member having excellent corrosion resistance, an outer coating layer coated with brass and gold is formed, and in the eddy current caused by the current induced in the outer layer member which is magnetic by the electromagnetic induction of the coil heating unit. The generated heat is transferred to the inner layer member to heat the inner pot.

However, since the inner pot container of the coated inner pot for the electromagnetic induction cooker of the prior art has a very low thermal conductivity of the outer layer member of stainless steel having excellent corrosion resistance, the thickness of the plated blue is too high even when plating brass and gold having excellent thermal conductivity to the outside. It is thin and the effect of improving the efficiency of thermal energy is weak, the corrosion resistance is strong, brass or golden plating is difficult to work, there is a problem that the process is increased, the productivity is reduced.

In addition, the inner pot container of the coating inner pot for the electromagnetic induction cooker in the prior art is provided with an outer coating layer to improve the thermal conductivity used for electromagnetic induction, while the portion used for the electromagnetic induction heating is limited to the coil heating portion. Since the outer layer member is used more than necessary, there is a problem in that the material cost is increased and the production cost due to processing is increased.

In addition, the inner pot container of the coated inner pot for the electromagnetic induction cooker of the prior art has excellent corrosion resistance, but the stainless steel member has excellent corrosion resistance, but the ferrite structure and permeability, which are essential elements of the induction heating apparatus, are significantly lower than those of the general metals. There was a problem that the thermal efficiency is lowered due to the eddy current generation of the electromagnetic induction method.

In addition, the inner pot container of the coating inner pot for the electromagnetic induction cooker of the prior art has a problem that it is difficult to uniformly manage the internal temperature as the amount of the contents of the food is changed as the whole portion of the inner pot container is heated.

In addition, the inner pot container of the coated inner pot for the electromagnetic induction cooker of the prior art has a problem that it is difficult to handle because the weight of the rice cooker is formed by forming the outer layer member of the stainless steel based on the outside.

In addition, the inner pot container of the coating inner pot for the electromagnetic induction cooker of the prior art, in order to form the inner layer member of the aluminum and the outer layer member of the stainless steel double, since expensive rolling equipment is required for the compression of the outer layer member and the inner layer member. In order to take the installation space and cost, and the difference in strain occurs during compression molding of the outer layer member and the inner layer member, it is necessary to slow the compression to minimize the strain, there is a problem that the work time is increased as well as the manufacturing cost increases.

In order to solve the above problems, the main object of the present invention is to form the inner pot of the electromagnetic induction cooker with a single member of the aluminum material, the lower portion is provided with a corrosion prevention layer to prevent corrosion as a corrosion prevention layer in the coil heating portion induced by the lower portion. The magnetic layer of low-carbon steel with excellent permeability and permeability is welded to the adhesive layer to reduce the manufacturing cost and improve productivity with a single member, and to increase the thermal efficiency by improving the electron induction efficiency.

As such, the inner pot for the electromagnetic induction cooker of the present invention devised to achieve the object is in the inner pot portion which is heated by the electromagnetic induction from the inside of the electromagnetic induction cooker to the coil heating portion, the inner pot portion to prevent the attachment of the cooked food The inner coating container is provided with an inner coating layer to be cooked as a single member, a lower heating part is formed at the coil heating part contacting part at the bottom of the inner pot part, and a magnetic layer is fused by the lower heating part to be fused to the adhesive layer, and the outside of the magnetic layer It characterized in that it is configured to form a corrosion protection layer to prevent corrosion.

In addition, the inner pot container of the inner pot portion is characterized in that it is configured to improve the thermal efficiency by forming a part of the aluminum-based single material having excellent light and thermal conductivity.

And, the adhesive layer of the inner pot portion is characterized in that it is configured to increase the adhesion ability of the magnetic layer to be fused by melting the aluminum wire, aluminum bronze and nickel to prevent the peeling phenomenon.

In addition, the magnetic layer of the inner pot portion is characterized in that the ferrite structure and the low carbon steel excellent in the projection rate is configured to increase the generation efficiency of the eddy current caused by the current induced in the coil heating unit.

In addition, the lower portion of the inner heating portion formed in the lower portion of the inner heating portion in the heating portion is provided with a groove-shaped heating groove is characterized in that it is configured to form a contact portion and a magnetic layer inside the heating groove.

In addition, the anti-corrosion layer of the inner pot portion is formed to apply aluminum or zinc to prevent corrosion of the magnetic layer is characterized in that configured to suppress the corrosion of the magnetic layer.

And, the inner pot portion is characterized in that it is configured to further include a heat conductive layer to improve the thermal conductivity and thermal conductivity by applying pure silver to the outside of the magnetic layer.

In addition, the inner pot manufacturing method for the electromagnetic induction cooker is an inner pot container forming step of forming the inner pot container as a single member by molding the plate of the aluminum member in the form of an inner pot which is heated by a coil heating unit inside the electromagnetic induction cooker;

An inner coating layer forming step of forming an inner coating layer to coat the inside with a coating material that prevents adhesion of the food cooked into the inner pot container formed in the inner pot shape in the inner pot container forming step;

In the step of forming the inner coating layer, the inner coating layer is formed inside the inner pot container in contact with the coil heating part at the bottom of the inner pot container to prevent the peeling phenomenon due to the thermal expansion coefficient outside the lower heating part heated by the electromagnetic induction. An adhesive layer melt spraying step of melting and spraying an aluminum wire, an aluminum bronze and an adhesive layer made of nickel so as to improve an adhesive ability;

In the adhesive layer melt-spraying step, the magnetic layer formed of low carbon steel, which has an excellent ferrite structure and permeability, increases the generation efficiency of the eddy current caused by the electrons induced in the coil heating unit, by melt-spraying the adhesive layer to the outside of the lower heating unit. A magnetic layer bonding step of adhering the inner side of the lower heating unit to improve the adhesive force while preventing the adhesive layer from peeling off;

A corrosion prevention layer forming step of forming an anti-corrosion layer on the outside by applying aluminum or zinc to prevent corrosion of the magnetic layer in a state in which the magnetic layer is bonded in the magnetic layer bonding step;

In the anti-corrosion layer forming step, the anti-corrosion layer is formed on the outside of the magnetic layer to prevent corrosion while forming a inner pot container having a lower heating portion heated by the eddy current caused by the electromagnetic induction when it comes into contact with the coil heating portion to complete the inner pot portion. Characterized in that comprises a step.

In addition, the magnetic layer bonding step is characterized in that it is configured to further comprise a thermal conductive layer forming step of forming a thermal conductive layer to improve the thermal conductivity and thermal conductivity by applying pure silver to the outside of the magnetic layer formed of a low-carbon steel with excellent ferrite structure and permeability. .

Thus, looking at the preferred embodiment of the inner pot for the electromagnetic induction cooker of the present invention and the method of manufacturing the configuration as follows with reference to the drawings.

First, in the drawings, the same components or parts are to be noted that the same reference numerals as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

Figure 4 is a perspective view showing the inner pot for the electromagnetic induction cooker according to the present invention, Figure 5 is a cross-sectional view showing the inner pot for the electromagnetic induction cooker according to the present invention, Figure 6 is another embodiment of the inner pot for the electromagnetic induction cooker according to the present invention 7 is a cross-sectional view showing another embodiment of the inner pot for the induction cooker according to the present invention, Figure 8 is a block diagram showing a state in which the inner pot for the electromagnetic induction cooker according to the present invention is installed, Figure 9 Is a process chart showing a method for producing an inner pot for an electromagnetic induction cooker according to the present invention, Figure 10 is an exemplary view showing a method for producing an inner pot for an electromagnetic induction cooker according to the present invention.

As shown in Figure 4 to 10, the inner pot for the electromagnetic induction cooker of the present invention in the inner pot portion 100 that is heated by the electromagnetic induction to the coil heating unit (2) inside the electromagnetic induction cooker (1), The inner pot part 100 is provided with an inner coating layer 120 to prevent adhesion of the cooked food to form the inner pot container 110 to be cooked as a single member, and the coil heating part 2 below the inner pot part 110. The lower heating part 130 is formed on the contact portion, the magnetic heating layer fused to the lower heating part 130 to be fused to the adhesive layer 150 to form a corrosion to prevent corrosion to the outside of the magnetic layer 160 It is configured to form the prevention layer 170.

Here, the inner pot container 110 of the inner pot part 100 is preferably formed of a single member of aluminum-based light and excellent thermal conductivity to improve the thermal efficiency.

In addition, it is preferable that the inner coating layer 120 coated inside of the inner pot part 100 is coated with fluorine resin so that the cooked food is not bonded.

In addition, the adhesive layer 150 of the inner pot part 100 may be configured to increase the adhesion ability of the magnetic layer 160 to be fused by spraying aluminum wire, aluminum bronze and nickel, and to prevent peeling.

In addition, the magnetic layer 160 of the inner pot portion 100 is formed of a low-carbon steel with excellent ferrite structure and excellent throwing rate to be configured to increase the generation efficiency of the eddy current caused by the current induced in the coil heating unit (2). Do.

In addition, a groove-shaped heating groove 140 is provided inside the lower heating part formed at the contact portion of the coil heating part 130 at the lower portion of the inner pot part 100 to heat the contact layer 150 and the magnetic layer 160. It is preferable to form so that it may form inside 140.

In addition, the anti-corrosion layer 170 of the inner pot portion 100 is preferably formed to apply aluminum or zinc to prevent corrosion of the magnetic layer 160 is configured to suppress the corrosion of the magnetic layer 160.

In addition, the inner pot part 100 is preferably configured to further include a thermal conductive layer 180 to improve the thermal conductivity and thermal conductivity by applying pure silver to the outside of the magnetic layer 160.

Thus, look at the action on the inner pot for the electromagnetic induction cooker of the present invention and the manufacturing method as follows.

First, the inner pot container forming step of forming the inner pot container 110 as a single member by molding the plate of the aluminum member in the form of an inner pot that is heated by the coil heating unit 2 inside the electromagnetic induction cooker 1 (S1) Through), the inner pot container formed in the inner coating layer forming step (S2) to form the inner coating layer 120 to coat the inside with a coating material to prevent the adhesion of the food cooked into the inner pot container 110 formed in the inner pot shape. An inner coating layer 120 is formed inside the 110.

Thus, in the inner coating layer forming step (S2) in the state of forming the inner coating layer 120 to the inside of the inner pot container 110 in contact with the coil heating unit 2 in the lower portion of the inner pot container 110 is heated by electromagnetic induction. Adhesive layer melt spraying step (S3) of melting and spraying the adhesive layer 150 made of aluminum wire, aluminum bronze, and nickel to prevent the peeling phenomenon due to the coefficient of thermal expansion to the outside and to improve the adhesion ability to the lower heating portion 130 to the outside At the bottom of the inner pot container 110, the melt spraying the adhesive layer 150.

At this time, in the inner coating layer forming step (S2) of the inner coating layer 120 to form the inner coating layer 120 inside the lower heating unit 130 in contact with the coil heating unit 2 is heated to the lower induction. It is preferable that the adhesive groove 150 and the magnetic layer 160 are formed in the heating groove 140 by processing the heating groove 140 in the groove shape.

As described above, the ferrite structure and the magnetic permeability are excellent in the state that the adhesive layer 150 is melt-sprayed to the outside of the lower heating unit 130 in the adhesive layer melt spraying step (S3) by electrons induced in the coil heating unit 2. Magnetic layer bonding step (S4) for adhering the magnetic layer 160 formed of low carbon steel to increase the generation efficiency of the eddy current to the outside of the lower heating portion 130 to improve the adhesive force while preventing peeling to the melt sprayed adhesive layer 150 The lower heating part 130 is formed in the anti-corrosion layer forming step (S5) of forming the anti-corrosion layer 170 on the outside by applying aluminum or zinc to prevent the corrosion of the magnetic layer 160 while the magnetic layer 160 is adhered thereto. The anti-corrosion layer 170 is formed to bond the magnetic layer 160 to the outside of the bottom surface and prevent corrosion to the outside of the adhesive layer 150.

At this time, the magnetic layer bonding step (S4) is a thermal conductive layer forming step of forming a thermal conductive layer 180 to improve the thermal conductivity and thermal conductivity by applying pure silver to the outside of the magnetic layer 160 formed of a low carbon steel with excellent ferrite structure and permeability ( It is preferable to comprise so that S7) may be further provided.

In this way, in the anti-corrosion layer forming step (S5) to form a corrosion prevention layer 170 on the outside of the magnetic layer 160 to prevent corrosion and the lower heating portion that is heated by the eddy current caused by electromagnetic induction when contacted with the coil heating unit (2) Forming the inner pot container (110) having a 130 to complete the inner pot portion (100) to complete the inner pot portion (100) to complete the inner pot portion 100 and mounted on the electromagnetic induction cooker (1) coil heating unit ( The magnetic layer 160 formed at the lower portion of the electromagnetic induction of 2) generates heat by the eddy current, so that the food may be cooked into the inner pot container 110 in which the inner coating layer 120 is formed.

As described above, the inner pot for the electromagnetic induction cooker and the method of manufacturing the same according to the present invention are configured in the inner pot part heated by the electromagnetic induction from the inside of the electromagnetic induction cooker to the coil heating part, and the inner pot part prevents the attachment of the cooked food. A coating layer is provided to form an inner pot container cooked as a single member, a lower heating part is formed under the inner pot container, a magnetic layer fused to the outside of the lower heating part to be fused to the adhesive layer, and to prevent corrosion to the outside of the magnetic layer. Formation of the prevention layer, by contacting the coil heating portion of the electromagnetic induction cooker to form a magnetic layer with a corrosion protection layer in the portion where the electromagnetic induction is generated to simplify the manufacturing process and reduce the material cost provides an effect of improving productivity.

In addition, the inner pot for the electromagnetic induction cooker of the present invention and a method of manufacturing the same are provided with a groove-shaped heating groove in the contact portion of the coil heating portion in the lower portion of the inner pot portion, so that the adhesive layer and the magnetic layer are formed inside the heating groove, the magnetic layer inside the inner pot portion. It is provided to provide the effect of increasing the thermal efficiency.

In addition, the inner pot for the electromagnetic induction cooker of the present invention and its manufacturing method is easy to manufacture by forming the inner pot container of the inner pot portion of the aluminum-based single member having a light and excellent thermal conductivity, while reducing the material cost, the aluminum single member excellent in thermal conductivity Using to provide the effect of improving the thermal efficiency.

In addition, the inner pot for the electromagnetic induction cooker of the present invention and a method for manufacturing the same by melting and spraying the aluminum wire rod and the aluminum bronze and nickel of the same material as the inner portion of the inner pot portion to the adhesive portion for bonding the magnetic layer to the outside of the lower heating portion. It provides an effect of improving the adhesive ability while preventing the peeling phenomenon due to the bonding of different materials.

In addition, the inner pot for the electromagnetic induction cooker of the present invention and a method of manufacturing the coil is formed by forming a magnetic layer in contact with the coil heating unit in the lower portion of the inner pot container to generate heat by the eddy current caused by the electromagnetic induction into a ferrite structure and low carbon steel with excellent throwing ratio By increasing the eddy current generating efficiency according to the electromagnetic induction generated in the coil of the heating unit provides an effect of increasing the heat generating efficiency.

In addition, the inner pot for an electromagnetic induction cooker and a method of manufacturing the same according to the present invention form a corrosion preventing layer coated with aluminum or zinc on the lower portion of the inner pot container in order to suppress corrosion of a magnetic layer formed to increase the efficiency of the eddy current caused by the electromagnetic induction. By preventing corrosion of the magnetic layer, thereby providing an effect of increasing the life.

In addition, the inner pot for the electromagnetic induction cooker of the present invention and a method of manufacturing the thermal efficiency by forming a thermal conductive layer coated with pure silver to improve the thermal conductivity and thermal conductivity of the magnetic layer formed to increase the efficiency of the eddy current caused by the electromagnetic induction of the inner pot container Provides the effect of increasing.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and will be understood by those of ordinary skill in the art that various modifications and variations can be made therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (10)

In the inner pot portion which is heated by the electromagnetic induction from the inside of the electromagnetic induction cooker, the inner pot portion is provided with an inner coating layer for preventing the attachment of the food to be cooked to form the inner pot container to be cooked as a single member, the inner pot portion The lower heating part is formed at the lower part of the coil heating part contact part, and the lower heating part is melted to form a magnetic layer that is fused by an adhesive layer fused by melting and spraying aluminum wire, aluminum bronze and nickel, and preventing corrosion to the outside of the magnetic layer. The inner pot for electromagnetic induction cooker, characterized in that configured to form a corrosion protection layer. The method of claim 1, The inner pot container of the inner pot portion is formed of a single member of aluminum-based light and excellent thermal conductivity, the inner pot for electromagnetic induction cooker, characterized in that configured to improve the thermal efficiency. delete The method of claim 1, The inner pot of the inner pot portion is formed of a low-carbon steel having excellent ferrite structure and projection rate to increase the generation efficiency of the eddy current caused by the current induced in the coil heating unit, the inner pot for electromagnetic induction cooker. The method of claim 1, Inner pot for electromagnetic induction cooker characterized in that the lower portion of the inner heating portion formed in the lower portion of the inner pot portion provided with a heating groove of the groove shape to form a contact portion and a magnetic layer in the inner side of the heating groove. The method of claim 1, The anti-corrosion layer of the inner pot portion is formed to apply aluminum or zinc to prevent corrosion of the magnetic layer, the inner pot for electromagnetic induction cooker, characterized in that configured to suppress the corrosion of the magnetic layer. The method of claim 1, The inner pot portion is an inner pot for an electromagnetic induction cooker, characterized in that configured to further comprise a thermal conductive layer to improve the thermal conductivity and thermal conductivity by applying pure silver to the outside of the magnetic layer. An inner pot container forming step of forming an inner pot container as a single member by molding an inner plate of the aluminum member in the form of an inner pot which is heated by a coil heating part inside the electromagnetic induction cooker; An inner coating layer forming step of forming an inner coating layer to coat the inside with a coating material that prevents adhesion of the food cooked into the inner pot container formed in the inner pot shape in the inner pot container forming step; In the step of forming the inner coating layer, the inner coating layer is formed inside the inner pot container in contact with the coil heating part at the bottom of the inner pot container to prevent the peeling phenomenon due to the thermal expansion coefficient outside the lower heating part heated by the electromagnetic induction. An adhesive layer melt spraying step of melting and spraying an aluminum wire, an aluminum bronze and an adhesive layer made of nickel so as to improve an adhesive ability; In the adhesive layer melt spraying step, a magnetic layer formed of low carbon steel, which has an excellent ferrite structure and permeability in the state of melt spraying to the outside of the lower heating unit and increases the generation efficiency of eddy currents caused by electrons induced in the coil heating unit, to the melt sprayed adhesive layer. A magnetic layer bonding step of adhering to the outside of the lower heating unit to improve the adhesive force while preventing peeling; A corrosion prevention layer forming step of forming an anti-corrosion layer on the outside by applying aluminum or zinc to prevent corrosion of the magnetic layer in a state in which the magnetic layer is bonded in the magnetic layer bonding step; In the anti-corrosion layer forming step, the anti-corrosion layer is formed on the outside of the magnetic layer to prevent corrosion while forming a inner pot container having a lower heating portion heated by the eddy current caused by the electromagnetic induction when it comes into contact with the coil heating portion to complete the inner pot portion. Induction pot manufacturing method for an electromagnetic induction cooker, characterized in that comprising a step. The method of claim 8, In the step of forming the inner coating layer, the inner coating layer is formed inside the inner pot container, and a contact groove and a magnetic layer are formed in the heating groove by processing a groove-type heating groove in the lower heating portion which is heated in contact with the coil heating portion. Induction pot manufacturing method for an electromagnetic induction cooker, characterized in that configured to. The method of claim 8, The magnetic layer bonding step is further configured to further comprise a thermally conductive layer forming step of forming a thermally conductive layer to improve the thermal conductivity and thermal conductivity by applying pure silver to the outside of the magnetic layer formed of a low-carbon steel with excellent ferrite structure and permeability. Inner pot manufacturing method for rice cooker

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