KR101826156B1

KR101826156B1 - Cooking utensils for induction heating and method of fabricating the same

Info

Publication number: KR101826156B1
Application number: KR1020150185416A
Authority: KR
Inventors: 정효태
Original assignee: 강릉원주대학교산학협력단
Priority date: 2015-12-23
Filing date: 2015-12-23
Publication date: 2018-02-06
Also published as: KR20170075587A

Abstract

The present invention relates to a container body comprising a ceramic body, a glass body or a ceramic body and having at least one concave portion in which at least a part of an outer bottom face is embedded; A metal electrode layer formed in the concave portion of the outer bottom surface; And a plating layer formed on the metal electrode layer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kitchen container for induction heating,

The present invention relates to a kitchen container and a manufacturing method thereof, and more particularly, to a kitchen container capable of induction heating and a method of manufacturing the same.

When a magnetic force line generated by a coil passes through a kitchen container capable of induction heating, a swirling current is generated by the resistance component of the material constituting the kitchen container. Since this swirling current is converted into heat by the resistance component of the material, So that cooking can be performed.

In recent years, there has been a growing interest in kitchen containers made of ceramics / glass free from harmful contaminants of environmental hormones or dissolving metals. However, kitchen containers containing ceramics, glass, or ceramics have problems such as the above- .

Korean Patent Publication No. 20100117410

As described above, induction heating is not realized in a kitchen container containing ceramics, glass or ceramics. SUMMARY OF THE INVENTION It is an object of the present invention to provide a kitchen container having a container body portion including ceramics, glass, or ceramics and capable of induction heating, and a method of manufacturing the same. However, these problems are exemplary and do not limit the scope of the present invention.

A kitchen container capable of induction heating according to one aspect of the present invention is provided. Wherein the induction heating capable kitchen container comprises a ceramic body, a glass body or a ceramic body, and has at least one concave portion in which at least a part of an outer bottom face is embedded; A metal electrode layer formed in the concave portion of the outer bottom surface; And a plating layer formed on the metal electrode layer.

In the kitchen container capable of induction heating, the rim of the outer bottom surface may protrude downward relative to the concave portion.

The kitchen container capable of induction heating may further include a foamed glass layer formed in the concave portion of the outer bottom surface and interposed between the outer bottom surface and the metal electrode layer.

A second metal electrode layer formed on an inner bottom surface of the container body portion; And a second plating layer formed on the second metal electrode layer.

In the kitchen container capable of induction heating, the at least one concave portion may include a plurality of concave portions spaced from each other.

Wherein the metal layer is a metal layer formed by a physical vapor deposition process, a chemical vapor deposition process, or an atomic layer deposition process, and the plating layer is formed of a material selected from the group consisting of iron (Fe), nickel (Ni), and cobalt And may contain at least any one selected.

A method of manufacturing a kitchen container capable of induction heating according to another aspect of the present invention is provided. A method of manufacturing a kitchen container capable of induction heating, comprising: a first step of providing a container body portion including a ceramic, glass, or ceramic, and having a concave portion in which at least a part of an outer bottom surface is embedded; A second step of forming a metal electrode layer in the concave portion of the outer bottom surface; And a third step of forming a plating layer on the metal electrode layer.

The manufacturing method of the kitchen container capable of induction heating may further include forming surface fine irregularities on the outer bottom surface of the container body part after the first step and the second step.

The manufacturing method of the kitchen container capable of induction heating may further include the step of corroding the surface of the metal electrode layer after the second step and before the third step.

The method of manufacturing a kitchen container capable of induction heating may further include forming a ceramic coating layer on the container body, the metal electrode layer, and the plating layer after the third step.

According to one embodiment of the present invention as described above, it is possible to provide a ceramic container of a ceramic / glass / ceramic which can be induction-heated freely from harmful contaminants of an environmental hormone or an elution metal, and a method of manufacturing the same. Of course, the scope of the present invention is not limited by these effects.

FIGS. 1A to 1C are views sequentially illustrating a method of manufacturing a kitchen container capable of induction heating according to an embodiment of the present invention.
FIGS. 2A and 2B are views sequentially illustrating a method of manufacturing a kitchen container capable of induction heating according to a comparative example of the present invention.
FIG. 3 is a conceptual diagram illustrating a configuration in which a kitchen container finally implemented by a manufacturing method according to an embodiment of the present invention is induction-heated by an induction range.
FIGS. 4-6 are illustrations of a kitchen container capable of induction heating according to other embodiments of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, Is provided to fully inform the user. Also, at least some of the components may be exaggerated or reduced in size for convenience of explanation. Like numbers refer to like elements throughout the drawings.

It is to be understood that throughout the specification, when an element such as a layer or a region is referred to as being "on" another element, the element may be directly "on" It will be understood that there may be other intervening components. On the other hand, when an element is referred to as being "directly on" another element, it is understood that there are no other elements intervening therebetween.

Relative terms such as "top" or "bottom" can also be used herein to describe the positional relationship of certain elements to other elements as illustrated in the drawings. Further, it is to be understood that these relative terms are intended to include not only the directions depicted in the Figures, but also the different directions of the components. For example, if an element is turned over in the figures, the elements depicted as being on the upper surface of the other elements will have a direction on the lower surface of the other elements. Thus, the example "top" may include both "under" and "top" directions depending on the particular orientation of the figure.

FIGS. 1A to 1C are views sequentially illustrating a method of manufacturing a kitchen container capable of induction heating according to an embodiment of the present invention.

Referring to FIG. 1A, a kitchen container 100a having a container body portion 120 is provided. The container body 120 is made of a material including ceramics, glass, or ceramics. For convenience, the surface of the container body portion 120 may include an outer bottom surface 120a, an outer side surface 120b, an inner bottom surface 120c, and an inner side surface 120d. The inside of the kitchen container 100a may be understood as a portion defining a space in which the object to be cooked is accommodated and the outside of the kitchen container 100a may include a portion in contact with or nearest to the heating source.

The container body portion 120 may have a concave portion C. The concave portion C may be formed by at least a part of the outer bottom surface 120a being embedded inward. For example, the concave portion C may be embodied such that the center region of the outer bottom surface 120a is embedded in the direction of the inner bottom surface 120c. In this case, the rim 120S of the outer bottom surface 120a can define the space of the concave portion C, and the rim 120S of the outer bottom surface 120a is relatively downward relative to the concave portion C As shown in Fig. The concave portion C may be understood as a cavity, a trench, a hole, or a space depending on the shape.

Referring to FIG. 1B, a metal electrode layer 142 is formed in the concave portion C of the outer bottom surface 120a of the container body 120. Various manufacturing processes to be described later can be applied using a mask which exposes only the concave portion C to form the metal electrode layer 142 only in the concave portion C. [

The metal electrode layer 142 may be formed on the container body portion 120 by, for example, an electroless plating process. The electroless plating process is used because the container body portion 120 is an insulator. Meanwhile, as another example, the metal electrode layer 142 may be formed by a physical vapor deposition (PVD) process. The physical vapor deposition process may include, for example, a vacuum deposition process or a sputtering process. In addition, the metal electrode layer 142 may be formed by a chemical vapor deposition (CVD) process or an atomic layer deposition (ALD) process.

The surface fine irregularities may be formed on at least a part of the container body portion 120 contacting the metal electrode layer 142 in order to increase the adhesive force between the container body portion 120 and the metal electrode layer 142. [ In order to form the surface fine irregularities, for example, a sandblasting process may be performed on at least a part of the container body portion 120 which is in contact with the metal electrode layer 142.

Referring to FIG. 1C, a plating layer 144 is formed on the metal electrode layer 142. The metal electrode layer 142 is formed in the concave portion C so that the plating layer 144 formed on the metal electrode layer 142 can also be formed in the concave portion C. The metal electrode layer 142 may be understood as an adhesive layer for improving the adhesion between the plating layer 144 and the container body 120. The metal electrode layer 142 and the plated layer 144 formed on at least a part of the outer bottom surface of the container body 120 may be referred to as an outer induction heating layer 140. In particular, the metal electrode layer 142 and the plated layer 144 may include a material that can be induction-heated by an induction range.

The plating layer 144 may contain a magnetic material such as iron (Fe), nickel (Ni), or cobalt (Co). As another example, the plating layer 144 may contain iron (Fe) and nickel (Ni). For example, the plated layer 144 may comprise an iron-nickel alloy containing 30% to 80% nickel. As a specific example, the plated layer 144 may comprise an Fe-Ni 45% alloy containing 45% nickel. As another example, the plated layer 144 may comprise an invar alloy or permalloy which is an Fe-Ni based alloy. Further, the plating layer 144 may be made to further contain chromium (Cr) selectively. The composition of the plating layer 144 described above is an exemplary composition for the purpose of understanding, and the scope of the present invention is not limited to such a specific composition.

In order to solve the problem that it is not easy to directly plated the plating layer 144 having the above composition onto the container body part 120 made of ceramics, glass or ceramics, the present inventor introduced the metal electrode layer 142 described above. In the plating process in which the plating layer 144 is implemented, the metal electrode layer 142 may be used as a plating electrode (or a plating auxiliary electrode).

On the other hand, in the kitchen container 100c capable of induction heating according to some embodiments of the present invention, the thickness of the plating layer 144 may be 150 mu m or more, strictly 150 mu m to 1000 mu m , More strictly, in the range of 150 [mu] m to 500 [mu] m. In this range, the kitchen container 100c capable of induction heating is recognized by the induction range without a short circuit, and induction heating can be performed.

In a kitchen container 100c capable of induction heating according to some embodiments of the present invention, the thickness of the plated layer 144 may be even more strictly in the range of 200 占 퐉 to 400 占 퐉. In this range, the kitchen vessel 100c capable of induction heating can be recognized without short-circuit due to the induction range while shortening the time for boiling water, and induction heating can be performed.

In a kitchen container 100c capable of induction heating according to some embodiments of the present invention, the thickness of the plated layer 144 may even more strictly range from 250 [mu] m to 400 [mu] m. In this range, the kitchen vessel 100c capable of induction heating is recognized by the induction range without short circuit while having the same or higher performance as that of the kitchen vessel in which the spray coating layer is formed, and induction heating can be performed.

In the manufacturing method according to the modified embodiments of the present invention, at least a part of the surface of the metal electrode layer 142 may be corroded before the plating layer 144 is formed on the metal electrode layer 142. When the plating layer 144 is formed on the surface of the metal electrode layer 142, the induction range is recognized without a short circuit, and induction heating can be smoothly performed.

The induction-heating-capable kitchen container 100c according to some embodiments of the present invention includes a ceramic container 100c formed on the container body portion 120, the metal electrode layer 142, and / or the plating layer 144, And may further comprise a coating layer. The ceramic coating layer may be formed by anodizing the surface of the plating layer 144. In order to improve the adhesion of the ceramic coating layer, a sandblasting process may be selectively performed on the plating layer 144 before the step of forming the ceramic coating layer.

FIGS. 2A and 2B are views sequentially illustrating a method of manufacturing a kitchen container capable of induction heating according to a comparative example of the present invention.

Referring to FIG. 2A, a container body 120 including a ceramic, glass, or ceramic is prepared to manufacture a kitchen container capable of induction heating according to a comparative example of the present invention. In comparison with FIG. 1A illustrating the embodiment of the present invention, in the comparative example of the present invention, the outer bottom surface 120a has a flat surface which does not have a concave portion embedded inward and does not have a step as a whole. Subsequently, the metal electrode layer 142 is formed on the outer bottom surface 120a having no concave portion. Accordingly, the edge portion E of the metal electrode layer 142 is exposed to the outside.

Referring to FIG. 2B, a plating layer 144 is formed on the metal electrode layer 142 through a plating process using the metal electrode layer 142 as an electrode (or an auxiliary electrode). However, an electric field may be concentrated on the edge portion E of the metal electrode layer 142, resulting in a problem that the plating layer 144 becomes abnormally thick. Such an unstable portion 144a of the plating layer is identified as a mechanical, physical, or chemically weak portion in the plating layer and the subsequent process.

1A to 1C, in the process of forming the plating layer 144, the rim 120S of the container body portion 120 made of an insulator is formed at the corner of the metal electrode layer 142, The electric field concentration phenomenon is mitigated or eliminated to overcome the problem that the abnormal portion 144a of the plating layer 144 is generated. Further, when the metal electrode layer 142 is formed so as to be in contact with the rim 120S of the container body portion 120, the thickness of the plating layer 144 at the corner portion abnormally increases in the process of forming the plating layer 144 Physically impossible. Therefore, according to the embodiments of the present invention, it is possible to provide a kitchen container capable of induction heating having a mechanically, physically or chemically stable and solid plating layer.

FIG. 3 is a conceptual diagram illustrating a configuration in which a kitchen container finally implemented by a manufacturing method according to an embodiment of the present invention is induction-heated by an induction range.

Referring to FIG. 3, a kitchen container 100c capable of induction heating according to an embodiment of the present invention may be induction-heated by an induction range 300. FIG. The induction range 300 may include an induction range that operates in the conventional commercial frequency range. When the magnetic force lines M generated in the coil 320 of the induction range 300 pass through the metal electrode layer 142 and / or the plating layer 144 capable of induction heating, the metal electrode layer 142 and / or the plating layer 144 The eddy current can be generated by the resistance of the constituent magnetic material (or iron-based material). Since the eddy current is converted into heat by the resistance, the metal electrode layer 142 and / or the plating layer 144 itself may generate heat and may be heated up to the container body 120 to be cooked.

FIGS. 4-6 are illustrations of a kitchen container capable of induction heating according to other embodiments of the present invention.

Referring to FIG. 4, the container body part 120 constituting the kitchen container capable of induction heating according to another embodiment of the present invention may have a plurality of indentations in which at least a part of the outer bottom surface 120a is embedded inward . The structure and manufacturing method of the metal electrode layer 142 and the plating layer 144 for filling the concave portions are the same as those described above. As the metal electrode layer 142 and the plating layer 144 are formed to have a wider area, the stress generated increases, resulting in peeling of the thin film. However, when a plurality of recesses spaced from each other are formed and the metal electrode layer 142 and the plating layer 144 are individually formed in the respective recesses, the thin film stress caused by each of the thin film forming areas is reduced, , An advantageous effect of preventing the thin film peeling phenomenon can be expected.

5, a kitchen container capable of induction heating according to another embodiment of the present invention is formed in a concave portion C of an outer bottom surface 120a and includes an outer bottom surface 120a and a metal electrode layer 142 And a foamed glass layer 141 interposed between the foamed glass layer 141 and the foamed glass layer 141.

Foamed glass, which may be referred to as macroporous glass or porous glass, is formed by mixing a foaming agent in a glass powder and heating it to foam and expand while melting. It has a specific gravity of about 0.15 to 0.4 and is lighter than glass and has excellent acid resistance and alkali resistance. The bubbles in the foamed glass are very small and independent, so they are whitish and have a unique beauty.

Since the foamed glass is similar to the material of the container body 120, the foamed glass layer 141 and the container body 120 can be easily bonded to each other. Furthermore, since the surface of the foamed glass is uneven, the surface area per unit volume is increased and the surface roughness is increased, so that the bonding force between the foamed glass layer 141 and the metal electrode layer 142 formed on the foamed glass layer 141 is remarkably improved . Accordingly, the foamed glass layer 141 can serve as an adhesive layer that can solve the problem of poor adhesion due to direct adhesion (adhesion) between the container body 120 and the metal electrode layer 142.

The surface fine irregularities may be formed on at least a part of the foamed glass layer 141 in contact with the metal electrode layer 142 in order to increase the adhesive strength between the foamed glass layer 141 and the metal electrode layer 142. [ In order to form the surface fine irregularities, for example, a sandblasting process may be performed on at least a part of the foamed glass layer 141 to be in contact with the metal electrode layer 142.

On the other hand, since the foamed glass layer 141 can have the heat insulating property, the effect of keeping the heated food loaded in the container body 120 can be expected.

Referring to FIG. 6, the induction-heating kitchen container according to another embodiment of the present invention further includes an inner induction heating layer 150 formed on at least a part of the inner bottom surface of the container body portion 120 . Further, the inner induction heating layer 150 may be formed to extend from the inner bottom surface of the container body portion 120 to at least a part of the inner side surface. Since the inner induction heating layer 150 capable of induction heating is formed at least on the inner bottom surface of the container body portion 120, the heating efficiency with respect to the object to be cooked can be further improved.

The inner induction heating layer 150 may be a laminate of the second metal electrode layer 152 and the second plating layer 154. Accordingly, the second metal electrode layer 152 can serve as an adhesive layer that can solve the problem of poor adhesion due to direct adhesion (adhesion) between the container body 120 and the plating layer 144.

In the plating process for forming the second plating layer 154, the second metal electrode layer 152 may be used as a plating electrode (or a plating auxiliary electrode). The material constituting the metal electrode layer 142 and the second metal electrode layer 152 may be the same. The material constituting the plating layer 144 and the second plating layer 154 may be the same. However, as long as the second metal electrode layer 152 and / or the second plating layer 154 are made of a material capable of induction heating, the metal electrode layer 142 and / / RTI > and / or < / RTI >

The step of forming the metal electrode layer 142 and the step of forming the second metal electrode layer 152 may be performed simultaneously, sequentially, or in reverse order. Further, the step of forming the plating layer 144 and the step of forming the second plating layer 154 may be performed simultaneously, sequentially, or in reverse order.

Meanwhile, although not shown in the drawing, in the kitchen container finally implemented by the manufacturing method according to another embodiment of the present invention, the above-mentioned outer induction heating layer 140 is not provided and the inner induction heating layer 150 May be provided on the container body part 120. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is possible to provide an induction-heatable kitchen container implemented with any combination of the embodiments shown in Figs. 4, 5 and 6. 4 and 5, the outer bottom surface 120a of the container body portion 120 has a plurality of recesses spaced from each other, and each of the recesses has a foamed glass layer 141, a metal electrode layer 142, and a plating layer 144 may be formed.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100c, 100d: Induction heated kitchen container
120: container body part
120a: outer bottom surface of the container body
140: outer induction heating layer
141: foamed glass layer
142: metal electrode layer
144: Plating layer
300: Induction Range

Claims

delete

A container body portion including a ceramic, glass, or ceramic, wherein at least a portion of the outer bottom surface has at least one recessed portion embedded inward;
A metal electrode layer formed in the concave portion of the outer bottom surface;
A plating layer formed on the metal electrode layer using the metal electrode layer as a plating electrode; And
A foamed glass layer formed in the concave portion of the outer bottom surface and interposed between the outer bottom surface and the metal electrode layer;
And,
The rim of the outer bottom surface of the container body part is made of an insulator and relatively protruded downward relative to the concave part to eliminate an electric field concentration phenomenon during the formation of the plating layer, thereby preventing the plating layer from abnormally thickening and,
The thickness of the plating layer is in the range of 150 占 퐉 to 1000 占 퐉 so that induction heating can be performed without being short-circuited by the induction range,
Induction heating is possible in kitchen containers.

A container body portion including a ceramic, glass, or ceramic, wherein at least a portion of the outer bottom surface has at least one recessed portion embedded inward;
A metal electrode layer formed in the concave portion of the outer bottom surface;
A plating layer formed on the metal electrode layer using the metal electrode layer as a plating electrode;
A second metal electrode layer formed on an inner bottom surface of the container body; And
A second plating layer formed on the second metal electrode layer;
And,
The rim of the outer bottom surface of the container body part is made of an insulator and relatively protruded downward relative to the concave part to eliminate an electric field concentration phenomenon during the formation of the plating layer, thereby preventing the plating layer from abnormally thickening and,
The thickness of the plating layer is in the range of 150 占 퐉 to 1000 占 퐉 so that induction heating can be performed without being short-circuited by the induction range,
Induction heating is possible in kitchen containers.

The method according to claim 3 or 4,
Wherein the at least one recess comprises a plurality of recesses spaced apart from each other.

The method according to claim 3 or 4,
Wherein the metal electrode layer is a metal layer formed by a physical vapor deposition process, a chemical vapor deposition process, or an atomic layer deposition process, and the plating layer contains at least any one selected from the group consisting of iron (Fe), nickel (Ni), and cobalt (Co) Induction heating is possible in kitchen containers.

A first step of providing a container body including a ceramic, glass or ceramic, wherein at least a part of the outer bottom surface has a concave portion which is embedded inward;
A second step of forming a metal electrode layer in the concave portion of the outer bottom surface;
A third step of forming a plating layer on the metal electrode layer using the metal electrode layer as a plating electrode; And
A fourth step of forming a second metal electrode layer on the inner bottom surface of the container body first and a second plating layer on the second metal electrode layer;
Lt; / RTI >
The rim of the outer bottom surface of the container body part is made of an insulator and relatively protruded downward relative to the concave part to eliminate an electric field concentration phenomenon during the formation of the plating layer, thereby preventing the plating layer from abnormally thickening and,
Wherein the thickness of the plating layer is in the range of 150 占 퐉 to 1000 占 퐉 so that the induction heating is performed without being short-circuited by the induction range.

8. The method of claim 7,
And forming surface micro concavities and convexities on the outer bottom surface of the container body part after the first step and before the second step.

8. The method of claim 7,
And etching the surface of the metal electrode layer after the second step and before the third step.

10. The method according to any one of claims 7 to 9,
And forming a ceramic coating layer on the container body, the metal electrode layer, and the plating layer after the third step.