KR101826153B1 - Cooking utensils for induction heating and method of fabricating the same - Google Patents

Cooking utensils for induction heating and method of fabricating the same Download PDF

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Publication number
KR101826153B1
KR101826153B1 KR1020150185384A KR20150185384A KR101826153B1 KR 101826153 B1 KR101826153 B1 KR 101826153B1 KR 1020150185384 A KR1020150185384 A KR 1020150185384A KR 20150185384 A KR20150185384 A KR 20150185384A KR 101826153 B1 KR101826153 B1 KR 101826153B1
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South Korea
Prior art keywords
layer
foamed aluminum
container body
aluminum layer
induction heating
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KR1020150185384A
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Korean (ko)
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KR20170075567A (en
Inventor
정효태
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강릉원주대학교산학협력단
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • A47J36/027—Cooking- or baking-vessels specially adapted for use in microwave ovens; Accessories therefor

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)

Abstract

The present invention relates to a container body comprising aluminum; A foamed aluminum layer formed on a bottom surface of the container body; And a plating layer formed on the foamed aluminum 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 in a coil passes through a kitchen container capable of induction heating, a swirling current is generated by a resistance component of a material constituting the kitchen container. Since the swirling current is converted into heat by the resistance component, Cooking can be performed.

Induction heating of a metal-containing kitchen container occurs at a specific frequency and typically aluminum kitchenware does not induce heating. Therefore, application of induction heating to aluminum kitchen containers which are light in weight and used frequently requires technical solution.

In order to realize induction heating in an aluminum kitchen container, iron plate cladding technique was tried on the container base plate. As a problem of this technique, the difference in thermal expansion between the aluminum plate and the cladding steel plate causes a problem that the steel plate is detached or deformed when the container is heated repeatedly.

Another technique for implementing induction heating in an aluminum kitchen container has been attempted to perform an iron spray coating on an aluminum base plate. When such a spray coating technique is applied, if the finished product is defective, it can not be partially repaired. Therefore, the entire finished product must be discarded, resulting in a problem of increased manufacturing cost. Due to the nature of the spray coating, The use of a thin aluminum aluminum kitchen container for lightening is limited, because heat distortion of the spraying process becomes severe and it can not be used.

Korean Patent Publication No. 20100117410

As described above, the aluminum kitchen container does not implement induction heating in the conventional commercial frequency range. The present invention provides a kitchen container and a manufacturing method thereof for solving the problem of thermal fatigue of a steel material for aluminum induction heating and the problem of manufacturing cost and weight of a spray coating, in which a uniform and stable plating layer is implemented with induction heating on an aluminum base plate . 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. The kitchen container capable of induction heating includes: a container body portion including aluminum; A foamed aluminum layer formed on an outer bottom surface of the container body; And a plating layer formed on the foamed aluminum layer.

Wherein the kitchen container capable of induction heating comprises: a second foamed aluminum layer formed on an inner bottom surface of the container body; And a second plating layer formed on the second foamed aluminum layer.

In the kitchen container capable of induction heating, the plating layer may contain at least one selected from iron (Fe), nickel (Ni), and cobalt (Co).

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 includes: a first step of providing a container body portion containing aluminum; A second step of forming a foamed aluminum layer on an outer bottom surface of the container body; And a third step of forming a plating layer on the foamed aluminum 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 foamed aluminum 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 foamed aluminum layer, and the plating layer after the third step.

According to one embodiment of the present invention as described above, induction heating can be implemented in a kitchen container made of aluminum which is relatively light in weight, and the thickness of the aluminum kitchen container can be reduced, Can be overcome, heat fatigue phenomenon can be improved, manufacturing cost can be lowered, and a kitchen container having an excellent appearance can be provided and a manufacturing method thereof. Furthermore, it is possible to provide a kitchen container with enhanced durability by providing the plating layer so that it can be attached (adhered) more strongly on the container body, and a method of manufacturing the same. Of course, the scope of the present invention is not limited by these effects.

1 to 3 are views sequentially illustrating a kitchen container sequentially implemented according to a manufacturing method according to an embodiment of the present invention.
FIG. 4 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.
FIG. 5 is a diagram illustrating a kitchen container finally implemented by a manufacturing method according to another embodiment of the present invention. FIG.

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.

1 to 3 are views illustrating a kitchen container sequentially implemented according to a manufacturing method according to an embodiment of the present invention.

Referring to FIG. 1, a kitchen container 100a having a container body portion 120 is provided. The container body 120 may be made of a metal material. For example, the container body portion 120 may contain a conductive metal. As a specific example, the container body portion 120 may contain aluminum (Al).

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 that is in contact with or relatively closer to the heating source.

Referring to FIG. 2, a foamed aluminum layer 142 is formed on at least a portion of the outer bottom surface of the container body portion 120. Further, although not shown in the drawings, the foamed aluminum layer 142 may be formed to extend from the outer bottom surface 120a of the container body portion 120 to at least a portion of the outer side surface 120b.

Foamed aluminum is a metal material with a large number of pores inside and has a density of 0.2 to 0.4 g / cm 3, which is extremely light as 1/10 of aluminum and 1/30 of iron, and is a material having a high energy absorption rate as a porous structure. Foamed aluminum may have thermal properties such that the thermal conductivity is 0.2 to 0.4 W / mK and the melting point is about 780 DEG C or more. The foamed aluminum layer 142 may be comprised of a material that can be inductively heated by an induction range operating in the commercial frequency range.

The bonding strength between the foamed aluminum layer 142 and the plated layer formed on the foamed aluminum layer 142 can be remarkably improved since the surface of the foamed aluminum is uneven so that the surface area per unit volume is increased and the surface roughness is increased. Accordingly, the foamed aluminum layer 142 can serve as an adhesive layer for improving the adhesive force (adhesion) between the container body 120 and the plated layer. Alternatively, the foamed aluminum layer 142 may be used as an electrode (or auxiliary electrode) in a subsequent plating process to form a plated layer on the foamed aluminum layer 142.

Foamed aluminum can be produced by adding a thickener and a foaming agent to an aluminum melt. For example, foamed aluminum may be a metal material produced by foaming in the form of a sponge having an aluminum composition of 90% or more. The foamed aluminum layer 142 can be implemented in a variety of ways in a kitchen container capable of induction heating according to embodiments of the present invention.

For example, after injecting aluminum molten metal into a thickening stirring crucible, adding the thickener while stirring the aluminum molten metal; Mixing the aluminum molten metal mixed with the thickener to the foaming agent diffusion crucible, stirring the foaming agent, and adding a foaming agent; And a step of forming an aluminum molten metal mixed with a thickener and a foaming agent on the container body 120 by using an extrusion die on a container body 120 of a desired size. The thickening agent for increasing the viscosity of the aluminum molten metal may include, for example, air, N 2 , CO 2 , H 2 O, Ar or Ca. Blowing agent may comprise a TiH 2 ZrH 2 or the like.

In another example, a mold is placed on a predetermined portion of the container body portion 120, and aluminum powder and calcium powder are provided on the exposed portion, and titanium hydride is mixed and mixed. When the temperature is raised, The foaming aluminum layer 142 can be formed while gas is generated.

As another example, the foamed aluminum layer 142 may be formed on the container body 120 using an aluminum tape in the form of a TSS (Thermal Spread Sheet) containing a large number of pores on the surface and the inside thereof. At least one surface (surface contacting the container body portion) of the aluminum tape may have an adhesive force so that it can be adhered without fixing the welding or the piece.

However, the above-described methods for producing foamed aluminum are merely illustrative examples for facilitating understanding of the present invention, and thus the present invention is not limited thereto.

In order to increase the adhesive force between the container body portion 120 and the foamed aluminum layer 142, surface fine irregularities may be formed on at least a part of the container body portion 120 in contact with the foamed aluminum layer 142 have. 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 to be in contact with the foamed aluminum layer 142.

Referring to FIG. 3, a plating layer 144 is formed on the foamed aluminum layer 142. The foamed aluminum layer 142 may be understood as an interposed adhesive layer for enhancing the adhesion between the plated layer 144 and the container body 120. The foamed aluminum 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, Which may be induction-heated by a range.

The plating layer 144 may contain a magnetic material such as iron (Fe), nickel (Ni), or cobalt (Co). For example, the plating layer 144 may contain at least one selected from iron (Fe), nickel (Ni), and 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.

To solve the problem that it is not easy to directly plated the plating layer 144 having the above composition onto the container body 120, the inventor of the present invention has introduced the foamed aluminum layer 142 described above. In the plating process in which the plating layer 144 is implemented, the foamed aluminum layer 142 can be used as a plating electrode (or a plating auxiliary electrode).

The induction-heating-capable kitchen container according to the modified embodiment of the present invention may further include an additional intervening layer (not shown) between the foamed aluminum layer 142 and the plated layer 144. The intervening layer disposed between the foamed aluminum layer 142 and the plated layer 144 may be a sputtering deposition layer formed by a sputtering process. The sputtering deposition layer may contain at least one selected from among copper (Cu), iron (Fe), nickel (Ni), cobalt (Co), and aluminum (Al). The types of these materials are illustrative, and the technical idea of the present invention is not limited to these kinds of exemplary materials. On the other hand, the sputtering deposition layer may be composed of a material which can be induction-heated by an induction range operating in the commercial frequency range.

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 portion of the surface of the foamed aluminum layer 142 may be corroded before forming the plated layer 144 on the foamed aluminum layer 142. When the plating layer 144 is formed on the foamed aluminum layer 142 that has been corroded by the surface, the induction range is recognized without short circuit, and induction heating can be smoothly performed.

The kitchen container 100c capable of induction heating according to some embodiments of the present invention includes a container body portion 120, a foamed aluminum layer 142, and a ceramic coating layer 144 formed on the plated layer 144, As shown in FIG. 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.

FIG. 4 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. 4, an induction-heating kitchen container 100c according to some embodiments 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. The eddy current can be generated by the resistance of the magnetic material (or iron-based material) constituting the plating layer 144 when the magnetic force line M generated in the coil 320 of the induction range 300 passes through the plating layer 144 . The eddy current is converted into heat by a resistor, so that the plating layer 144 itself is heated and can be heated up to the container body 120 to be cooked.

The foamed aluminum layer 142 has electromagnetic wave shielding properties. The magnetic force lines M generated in the coil 320 of the induction range 300 can pass through the foamed aluminum layer 142 to the inside of the container 200. Therefore, It is possible to minimize the influence on the food stored in the body portion 120 and the container body portion 120.

The container body portion 120 made of aluminum is not subjected to induction heating, so that the magnetic force line M does not need to reach the container body portion 120. However, in the case where the foamed aluminum layer 142 having electromagnetic wave shielding properties is not interposed, the magnetic force line M unnecessarily reaches the container body portion 120, so that the efficiency of the magnetic force line M can be lowered, and the induction range 300 ) May be lowered. The electromagnetic wave that is not passed through the foamed aluminum layer 142 but is reflected is induction-heated again by the plating layer 144, so that the induction heating efficiency can be increased.

When the foamed aluminum layer 142 having electromagnetic wave shielding properties is not interposed, the magnetic force line M generated in the coil 320 of the induction range 300 affects the food stored in the container body 120, Nutrients in the body may be destroyed. By introducing the foamed aluminum layer 142 having electromagnetic wave shielding property, it is possible to help maintain the nutrients of the food to be cooked.

On the other hand, although the induction range 300 is low in risk due to flammable or flammable gases, electromagnetic waves exceeding the international safety standard value may be generated depending on the usage. The International Commission on Non-Ionizing Radiation Protection (ICNIRP), a cooperative body of the World Health Organization, has developed guidelines for protecting the human body from electromagnetic waves and has set limits on the electromagnetic waves emitted by the induction range. Induction heating was implemented and electromagnetic waves were measured after the kitchen container capable of induction heating was placed on the induction range 300. As a result, it was found that the highest electromagnetic wave just above the bottom surface of the kitchen container than the front surface and the periphery of the induction range 300 Respectively. Therefore, when introducing the foamed aluminum layer 142 having electromagnetic wave shielding properties in the kitchen container capable of induction heating according to the embodiments of the present invention, it is possible to expect an advantageous effect that the human body can be protected from electromagnetic waves.

FIG. 5 is a diagram illustrating a kitchen container finally implemented by a manufacturing method according to another embodiment of the present invention. FIG.

5, the kitchen container 100d finally implemented by the manufacturing method according to another embodiment of the present invention includes an inner induction heating layer 150 formed on at least a part of the inner bottom surface of the container body part 120 ). ≪ / RTI > 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 includes a second foamed aluminum layer 152; And a second plating layer 154 formed on the second foamed aluminum layer 152. In the plating process for forming the second plating layer 154, the second foamed aluminum layer 152 may be used as a plating electrode (or a plating auxiliary electrode).

The materials constituting the foamed aluminum layer 142 and the second foamed aluminum layer 152 may be the same. The material constituting the plating layer 144 and the second plating layer 154 may be the same. However, the technical idea of the present invention is not limited to this. For example, as long as the second foamed aluminum layer 152 and / or the second plated layer 154 are composed of a material capable of induction heating, ) And / or the plating layer 144. [0050]

The step of forming the foamed aluminum layer 142 and the step of forming the second foamed aluminum 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. [

The kitchen container capable of induction heating according to various embodiments of the present invention has been described so far, and a plating layer is introduced with a material that can be induction heated by an induction range. However, in a kitchen container capable of induction heating according to another modified embodiment of the present invention, a vapor deposition layer formed by physical vapor deposition or chemical vapor deposition may be substituted for the plating layer. For example, in a kitchen container capable of induction heating according to another modified embodiment of the present invention, the foamed aluminum layer 142 described above is formed on the container body portion 120, and the foamed aluminum layer 142 is formed on the foamed aluminum layer 142 After the sputtering deposition layer is formed, the ceramic coating layer is covered and completed, but the plating layer 144 may not be formed. In this case, the foamed aluminum layer 142 and / or the sputtering deposition layer may comprise a material that can be induction-heated by an induction range operating in the commercial frequency range.

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
140: outer induction heating layer
142: foaming aluminum layer
144: Plating layer
300: Induction Range

Claims (7)

delete A container body portion comprising aluminum;
A foamed aluminum layer formed on an outer bottom surface of the container body;
A plating layer formed on the foamed aluminum layer using the foamed aluminum layer as a plating electrode;
A second foamed aluminum layer formed on an inner bottom surface of the container body; And
A second plating layer formed on the second foamed aluminum layer;
/ RTI >
The plating layer is a material which can be induction-heated by an induction range and has a thickness ranging from 150 μm to 1000 μm,
Wherein the foamed aluminum layer is used as an adhesive layer interposed between the container body portion and the plating layer to improve the adhesive strength of the container body portion and the plating layer. 3. The method of claim 2,
Wherein the plating layer contains at least one of iron (Fe), nickel (Ni), and cobalt (Co). A first step of providing a container body portion containing aluminum;
A second step of forming a foamed aluminum layer on an outer bottom surface of the container body;
A third step of forming a plating layer on the foamed aluminum layer using the foamed aluminum layer as a plating electrode;
A fourth step of forming a second foamed aluminum layer on an inner bottom surface of the container body; And
A fifth step of forming a second plating layer on the second foamed aluminum layer;
Lt; / RTI >
The plating layer is a material which can be induction-heated by an induction range and has a thickness ranging from 150 μm to 1000 μm,
Wherein the foamed aluminum layer is used as an adhesive layer interposed between the container body portion and the plating layer to improve the adhesive strength of the container body portion and the plating layer. 5. The method of claim 4,
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. 5. The method of claim 4,
The method of claim 1, further comprising, after the second step and before the third step, etching the surface of the foamed aluminum layer. 7. The method according to any one of claims 4 to 6,
And forming a ceramic coating layer on the container body, the foamed aluminum layer, and the plating layer after the third step.




KR1020150185384A 2015-12-23 2015-12-23 Cooking utensils for induction heating and method of fabricating the same KR101826153B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200422602Y1 (en) * 2006-05-15 2006-07-27 조철환 A kitchen utensils for induction range
KR100913119B1 (en) * 2009-01-29 2009-08-19 조용래 Cooking vessel and manufacturing method thereof
JP4395310B2 (en) * 2003-02-28 2010-01-06 三菱電機株式会社 Induction heating cooking pan and rice cooker
KR101258536B1 (en) * 2011-06-30 2013-06-04 김문화 Multi Storied Rice Cooker for Institutional Food Service
KR101452291B1 (en) * 2013-11-05 2014-10-22 (주)훼니코 Methods of fabricating cooking utensils for induction heating

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4395310B2 (en) * 2003-02-28 2010-01-06 三菱電機株式会社 Induction heating cooking pan and rice cooker
KR200422602Y1 (en) * 2006-05-15 2006-07-27 조철환 A kitchen utensils for induction range
KR100913119B1 (en) * 2009-01-29 2009-08-19 조용래 Cooking vessel and manufacturing method thereof
KR101258536B1 (en) * 2011-06-30 2013-06-04 김문화 Multi Storied Rice Cooker for Institutional Food Service
KR101452291B1 (en) * 2013-11-05 2014-10-22 (주)훼니코 Methods of fabricating cooking utensils for induction heating

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