KR20180085390A - Cooking instrument including heating layer - Google Patents

Abstract

The present invention relates to a cooking container with a heat emitting layer formed to supply heat to a cooking material stored inside. According to an embodiment of the present invention, the cooking container, including a heat emitting layer to supply heat to a cooking material, includes: a container body storing a cooking material and made of a thermally conductive material; and a heat emitting layer formed by electrospinning a radiating substance including at least one among a polymer substance and a nanosubstance to cover at least one part of the outer or inner surface of the container body so that the cooking material is heated directly or through the container body. The heat emitting layer is formed to make a network by being electrically connected in an intersection of a plurality of nano heat emitting fibers formed through the electrospinning of the radiating substance.

Description

(Cooking instrument including heating layer)

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooking vessel having a heating layer formed therein, and more particularly, to a cooking vessel having a heating layer formed therein to supply heat to a cooking object accommodated therein.

In general, when performing specific tasks such as management of a building or specific facilities such as leisure activities or expenses such as mountain climbing, fishing, sports, or training in winter or low temperature in low atmospheric temperature, beverages such as coffee heated at an appropriate temperature Or hot water to cook instant foods such as ramen noodles is needed.

A heating means such as a portable burner is preferably used to obtain a beverage having a proper temperature or to heat the milk powder or the milk. However, when performing a leisure activity or a specific operation, carrying such a heating means separately incurs a considerable inconvenience . In addition, it is impossible to carry the actual heating means when the baby goes out together with the infant. In addition, depending on the place, it is prohibited to carry the heating means because of a safety accident such as a fire, so it is not easy to warm the food outdoors.

Recently, in order to improve this point, the heating heat generated in the hydration reaction of the exothermic materials such as calcium carbonate (CaCO3), calcium hydroxide (Ca (OH) ₂) and sodium bicarbonate (NaHCO3) , And a ready-to-cook cooking vessel capable of heating or cooking food has been developed and marketed (see prior art document 1).

1 is a cross-sectional view showing a cooking container C using a conventional heating element.

1, the cooking vessel C includes an inner cooking vessel 1, an outer heating vessel 2 surrounding the cooking vessel 1, and a heating vessel 2 between the cooking vessel 1 and the heating vessel 2 And a heating container 4 including a heating element 3 positioned to surround the entire cooking cavity C.

The heating body 3 and the water are accommodated together in the space S between the cooking vessel and the heating vessel so that the food contained in the inner cooking vessel is heated by the reaction between the heating body and water.

However, when the conventional cooking vessel is used, if the user disassembles the clamping means to separate the inner cooking vessel and the outer heating vessel, a residual pressure higher than atmospheric pressure exists in the space between the cooking vessel and the heating vessel. There is a risk of explosion where hot water vapor or water splashes or even the inner cooking vessel is thrown out.

In addition, there is a disadvantage that the heating element must be replaced at any time in order to use the cooking container repeatedly, and there is a problem that the heating elements formed of a chemical cause corrosion of containers and various kinds of contamination.

1. Korean Registered Utility Model No. 20-0467604 (title of invention: instant cooking container using heating element)

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a heat generating layer, which is self- The present invention has been made in view of the above problems.

Accordingly, it is an object of the present invention to provide a cooking container which is easy to carry, so that hot water can be easily obtained or cooked when a leisure activity or a specific operation is performed outdoors.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a cooking vessel having a heating layer formed therein, the cooking vessel having a heating layer for supplying heat to a cooking object accommodated therein, the cooking vessel comprising: ; And a radiation material containing at least one of a nanomaterial and a polymer material so as to at least partially cover an inner circumferential surface or an outer circumferential surface of the container body so as to directly heat the object to be cooked or to heat the object to be cooked via the container body, a heating layer formed by electrospinning; Wherein the heating layer is electrically connected to a network at a point where a plurality of nano-calorific fibers formed by electrospinning the radiating material cross each other.

According to another aspect of the present invention, there is provided a power supply apparatus including: a handle having a power supply for supplying power to the heating layer; And the power supply device and the heating layer are electrically connected to each other.

According to another aspect of the present invention, the handle may be configured to be detachable.

According to another aspect of the present invention, a protective layer may be further formed to cover the heating layer.

According to another aspect of the present invention, the nanomaterial may be silver nanoparticles.

According to another aspect of the present invention, when a voltage of 10V to 300V is supplied to the heating layer, the density of the nano-heating fibers may be determined such that the heating layer generates heat in a temperature range of 80 ° C to 300 ° C.

According to another aspect of the present invention, the nano-calorific fiber may be formed to occupy 30% to 90% of the area of the container body.

According to another aspect of the present invention, the heating layer may be formed by co-electrospinning the radiating material.

According to the cooking vessel in which the heating layer of the present invention is formed, by providing the cooking vessel with a heat generating layer that generates heat by self-heating upon receiving electric power, the cooking vessel housed therein can be heated directly, The object can be heated.

Further, according to the cooking vessel in which the heating layer of the present invention is formed, it is easy to carry, and when leisure activities or specific work are performed outdoors, hot water can be easily obtained or food can be cooked.

FIG. 1 is a cross-sectional view schematically showing a cooking container having a conventional heating layer.
FIG. 2 is a perspective view schematically showing a cooking container having a heating layer according to an embodiment of the present invention. Referring to FIG.
3 is a cross-sectional view schematically showing a cross section taken along line AA in Fig.
Fig. 4 is an enlarged view showing an enlarged specific configuration of the fastening portion of Fig. 2;
5 is a perspective view schematically showing a heat generating layer of the present invention and nano heat generating fibers included therein.
6 is a block diagram schematically showing an electrospinning device for producing nano-calorific fibers and a method for producing nano-calorific fibers using the device.
7 is a cross-sectional view schematically showing the shape of a nozzle that can be used in the electrospinning apparatus of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

It is to be understood that elements or layers are referred to as being "on " other elements or layers, including both intervening layers or other elements directly on or in between.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

Like reference numerals refer to like elements throughout the specification.

The sizes and thicknesses of the individual components shown in the figures are shown for convenience of explanation and the present invention is not necessarily limited to the size and thickness of the components shown.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other partially or entirely and technically various interlocking and driving is possible as will be appreciated by those skilled in the art, It may be possible to cooperate with each other in association.

Hereinafter, a cooking vessel having a heating layer according to the present invention will be described in detail with reference to FIGS. 2 to 4 attached hereto.

1. Composition of cooking vessel

FIG. 2 is a perspective view schematically showing a cooking vessel having a heating layer according to an embodiment of the present invention, FIG. 3 is a sectional view schematically showing a cross section taken along the line AA in FIG. 2, Fig. 2 is an enlarged view showing an enlarged specific configuration of the fastening portion. Fig.

2 and 3, the cooking container 100 of the present invention includes a container body 110 for receiving a cooking object, a heating layer 120 formed to cover at least a part of an inner circumferential surface or an outer circumferential surface of the container body, A protective layer 130 formed to surround the heating layer, a cover member 140 forming an outer shape of the cooking utensil, and a handle 150.

The container body 110 is opened at the top and is recessed so that the object to be cooked can be received therein. In FIG. 2, a frying pan is exemplified. However, the present invention is not limited to this, and it is needless to say that the cooking cavity can be formed in various known cooking vessels such as a pot, a kettle, and the like.

The container body 110 is preferably formed of a thermally conductive material having heat resistance while transferring the heat generated in the heating layer 120 to the object to be cooked. In addition, the container body 110 should be formed of a material that is not corroded or denatured in contact with the object to be cooked. For example, such a material may be stainless steel or ceramic tempered glass.

Referring to FIG. 3, the heating layer 120 is a layer that generates heat by electrical resistance, and is formed in close contact with the inner or outer peripheral surface of the container body 110.

The heating layer 120 is formed on the lower surface and the side surface of the outer circumferential surface of the container body 110 but the present invention is not limited thereto and the heating layer 120 may cover at least a part of the inner circumferential surface and / Of course, be formed.

The heating layer 120 may be formed by electrospinning a spinneret including at least one of a nanomaterial and a polymer material on one surface of the container body 110. Alternatively, the heating layer 120 may be formed by attaching a heat generating film formed by electrospinning a spinning material on a separate substrate to the container body 110. In other words, the heating layer 120 may be formed in a manner that it is adhered in the form of a heating film separate from the method of directly radiating and forming, and is not particularly limited.

Specifically, the heating layer 120 is configured to be electrically connected at a point where a plurality of nano heat generating fibers formed by electrospinning a spinning material intersect with each other to form a network. Specific details of the nano-exothermic fiber and the heat generating layer 120 will be described later with reference to Figs. 5 to 7.

The heating layer 120 may include an electrode 121 contacting the heating layer 120 to be electrically connected to a power source device 151 to be described later.

In the description of the cooking container 100 of the present invention, the heating body 120 is formed on one surface of the container body 110 as a single layer, and the object to be cooked is brought into contact with the opposite surface , It is not necessarily limited to such a structure. For example, the container body 110 may be formed of multiple layers, a heat-resistant coating layer may be separately formed between the container body 110 and the heating layer, or a corrosion-inhibiting coaching layer may be separately formed on the inner peripheral surface .

The cooking vessel 100 includes a protective layer 130 formed to surround the heating layer 120.

The protective layer 130 serves as an insulating layer that prevents current flowing in the heat generating layer 120 from leaking to the outside but also acts as a heat insulating layer to prevent heat generated in the heat generating layer from being lost to the outside, And a waterproof layer that can prevent moisture permeation of the water.

The protective layer 130 is preferably formed in close contact with the container body 110 together with the heat generating layer 120.

The protective layer 130 may be formed by applying a synthetic resin such as polypropylene or polytetrafluoroetylene or may be formed by applying an inorganic material such as silica (SiO 2). In addition, the protective layer 130 may be formed by pressing another film type synthetic resin or a film of an inorganic material to cover the heat generating layer 120 by thermocompression using an automatic hot press.

However, the protective layer 130 is not limited to the above-described ones. If the protective layer 130 can effectively protect the heat generating layer 120, a known material may be employed to form the protective layer 130 to be.

The cover member 140 constitutes the outer shape of the cooking vessel and may be formed of a known material forming a cooking vessel and may be configured to cover the container body 110, the heating layer 120, Respectively.

Referring again to FIG. 2, the cooking vessel 100 of the present invention includes a handle 150.

A power supply device 151 for supplying electric power to the heat generating layer 120 of the cooking container 100 and an electrode 121 formed on the heat generating layer 120 are electrically connected to the handle 150 A wire (not shown) is provided.

At this time, the handle 150 is configured to be detachable from the portion of the cooking container 100 in which the cooking object is received, so that the handle 150 is connected to a portion of the cooking container 100 in which the cooking object is received, 151 and the heating layer 120 can be electrically connected to each other. That is, the electrode 121 and the power supply unit 151 are electrically connected to each other. The heat generating layer 120 is supplied with power from the power supply unit 151 and can convert heat energy into heat energy.

In the present invention, the power supply device 151 is not specifically limited and a known configuration may be employed. Further, the power supply device 151 may be selectively configured to have an on / off function.

4, the handle fastening portion 152 has a groove 101 formed at one side of the rim of the opening of the cooking utensil 100 and a protrusion 152a formed in the handle 150 is inserted into the groove 101 As shown in FIG.

Concretely, the protrusion 152a is inserted into the groove 101, and at the same time, the gripper 152b formed to extend parallel to the protrusion 152a is configured to clamp the rim of the cooking container 100. [ Accordingly, the handle 150 includes the projecting portion 152a and the grip portion 152b, so that the handle 150 can be stably connected and fixed to the portion of the cooking container 100 where the cooking object is received, The electrode 151 and the electrode 121 can be electrically connected.

However, the present invention is not limited to the illustrated example, and the structure of the removable handle is applicable to various fastening structures of the detachable handle disclosed in Korean Patent Registration No. 10-1202930 and Korean Patent Registration No. 10-1147113 And a known fastening structure such as a threaded coupling structure can be applied.

Hereinafter, with reference to FIGS. 5 to 7, the structure of the nano-exothermic fiber forming the heat-generating layer 120 included in the present invention and the method for producing the nano-exothermic fiber will be described in detail.

2. Composition of nano-exothermic fiber contained in exothermic layer

5 is a perspective view schematically showing a heat generating layer 120 of the present invention and nano heat generating fibers F included therein.

Referring to FIG. 5, the heat generating layer 120 includes a plurality of nano heat generating fibers F.

The nano-exothermic fibers F are electrically connected to each other at a point N where they cross each other, so that a plurality of nano-calorific fibers F can form a network and current can flow.

The nano-exothermic fibers (F) may be formed to have a diameter ranging from about 50 nm to 1 mu m and a length ranging from several mu m to several hundred mu m.

Due to the characteristics of such a fine and flexible nano-calorific fiber F, the heat-generating layer formed by including the nano-calorific fiber F is not easily damaged by an external force such as folding or bending, and thus the electric safety can be ensured.

The density of the nano-exothermic fibers F formed is such that when the voltage of 10 V to 300 V is supplied to the heat generating layer 120, the heat generating layer 120 and the container body 110 contacting the heat generating layer 120 are heated to 80 ° C To < RTI ID = 0.0 > 300 C. < / RTI > In order to configure the heating layer 120 to satisfy such a performance condition, the nano heat generating fibers F may be formed to occupy 30% to 90% of the area of the heat generating layer 120.

3. Manufacturing method of nanofiber fiber

6 is a block diagram schematically showing an electrospinning device for producing nano-calorific fiber and a method for producing nano-calorific fiber using the device, and Fig. 7 is a cross-sectional view of a nozzle used for the electrospinning device of Fig. 6 Sectional view schematically showing the shape of the semiconductor device.

Electrospinning device

6, the electrospinning device includes a spinning solution tank 10, a spinning nozzle 20, an external power source 30, and a collector substrate 40.

The spinning solution tank 10 stores the spinning solution. The spinning solution tank 10 can pressurize the spinning solution using a built-in pump (not shown) to provide the spinning solution to the spinning nozzle 20.

The spinning nozzle 20 receives the spinning solution from the spinning solution tank 10 and emits the spinning solution. The spinning nozzle 20 emits the spinning solution by the voltage applied by the external power source 30 after the spinning solution is pressurized by the pump to fill the nozzle tube therein.

Here, as the spinning nozzle 20, a single nozzle 20a as shown in FIG. 7 (a) may be used, or a double nozzle 20b as shown in FIG. 7 (b) may be used.

Two types of spinning nozzles can be selectively used depending on the structure of the nano-exothermic fibers (F) included in the heat generating layer of the present invention. The manufacturing process of the nano-exothermic fiber (F) using the single nozzle (20a) or the double nozzle (20b) and the structure of the produced nano-calorific fiber (F) will be described later.

The external power supply 30 provides a voltage such that the spinning solution is radiated to the spinning nozzle 20. The voltage may vary depending on the type of spinning solution and the amount of spinning. For example from about 100 V to about 30000 V, and can be DC or alternating current. The voltage applied by the external power supply 30 can radiate the spinning solution filled in the spinning nozzle 20. [

The collector substrate 40 is located below the spinneret and accommodates the spinning solution to be emitted. Collector substrate 40 may be grounded to have a voltage of 0V, which is the ground voltage, or collector substrate 40 may have a voltage opposite to spinneret 20. Since the spinning nozzle 20 is charged to a positive voltage or a negative voltage by the external power source 30 and thus the spinning solution is also charged, a voltage difference occurs with the collector substrate 40 having a grounded or opposite voltage do.

When a voltage is applied to the spinning nozzle 20 by the external power source 30, the spinning solution at the end of the spinning nozzle 20 is formed into a conical shape like a Taylor cone. At this time, an electric field in the range of about 50000 V / m to about 150000 V / m may be formed between the spinning nozzle 20 and the spinning solution. Due to the voltage difference, the spinning solution can be radiated to the collector substrate 40 and received.

By controlling the flow rate of the spinning solution and the difference in voltage between the spinneret 20 and the collector substrate 40, the diameter and length of the nano-calorific fiber structure 50 accommodated in the collector substrate 40 Can be controlled. For example, the nanofibrillated fibrous structure 50 emitted from the electrospinning device described above may have a diameter in the range of about 50 nm to 1 mu m and a length in the range of about several mu m to several hundred mu m.

Meanwhile, the positional relationship between the spinneret 20 and the collector substrate 40 in FIG. 6 is exemplary, and the technical idea of the present invention is not limited thereto.

For example, the collector substrate 40 may be positioned above the spinneret 20 and spinning solution may be radiated upwardly from the spinneret 20, and the collector substrate 40 may be spin- And the spinning solution radiated from the spinning nozzle 20 may be radiated in the horizontal direction. The electrospinning method according to various arranging methods of the spinning nozzle 20 and the collector substrate 40 can be included in the technical idea of the present invention. The collector substrate 40 is not limited to the planar substrate. However, it is needless to say that a drum-type collector that rotates about the center axis of the collector substrate 40 may be used.

Further, the spinning nozzle 20 can spin the spinning solution in a linear form, for example, in a wire form or a rod form (i.e., a spinning mode). On the other hand, the spinning nozzle 20 can spin the spinning solution in the form of a spray (i.e., a spray mode). The spinning solution may be radiated in different forms depending on its physical properties such as the viscosity of the solution, the weight ratio of the solute in the solution, the type of the solute and the solution, and the molecular weight of the solute and the solvent. Lt; / RTI > For example, an electrospinning process can be performed by a spinning mode when the spinning solution has a relatively high viscosity or a relatively low voltage is applied, and the spinning solution has a relatively low viscosity, The electrospinning process can be performed by the spray mode when a high voltage is applied.

The spinning mode and the spraying mode can be performed in combination in the production of the nano-calorific fiber (F), and will be described in more detail in the following description of a method of manufacturing a heating layer according to a single spinning coating process.

Electrospun material

The nano-exothermic fibers forming the heat generating layer included in the present invention are made of nanomaterials and high molecular materials.

The nanomaterial may comprise a conductive material, for example, including a metal nanomaterial or may comprise a carbon nanomaterial.

Specifically, the nanomaterial may be at least one selected from the group consisting of Ag, Cu, Co, Sc, Ti, Cr, Mn, (Cu), zinc (Zn), yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), technenium (Tc), ruthenium (Ru) , Cadmium (Cd), hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum , Lanthanide, actinoid, silicon, germanium, tin, arsenic, antimony, bismuth, gallium, And indium (In).

Nanomaterials can be composed of materials having a variety of nanoscopic shapes and include, for example, nanoparticles, nanowires, nanotubes, nanorods, nanowalls, (nanobelts), and nanorings (nanorings).

These nanomaterials can be composed of solutions of nanomaterials dissolved in a soluble solvent. The soluble solvent may be selected from the group consisting of water, alcohols and mixtures thereof, and examples thereof include water, methanol, ethanol, propanol, isopropanol, butanol, acetone, tetrahydrofuran, toluene or dimethylformamide, dimethylsulfoxide, N, N-dimethylformamide, 1-methyl-2-pyrrolidone, trimethylphosphate, and mixtures thereof.

However, the nanomaterial and the nanomaterial solution described above are illustrative, and the technical idea of the present invention is not limited thereto.

The polymer nanofibers formed from the polymer material and the polymer material may include various high molecular materials.

For example, the polymeric material may be selected from the group consisting of polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), polymethyl methacrylate (PMMA), polydimethylsiloxane (PDMS), polyurethane, polyether urethane, cellulose acetate, cellulose (PA), polyacrylonitrile (PAN), polyperfuryl alcohol (PPFA), polystyrene, polyethylene oxide (PEO), poly (methyl methacrylate) And may include at least one selected from the group consisting of propylene oxide (PPO), polycarbonate (PC), polyvinyl chloride (PVC), polycaprolactone, polyvinyl fluoride and polyamide. The polymer material and the polymer nanofiber may include a copolymer of the above-mentioned materials, and examples thereof include a polyurethane copolymer, a polyacrylic copolymer, a polyvinylacetate copolymer, a polystyrene copolymer, a polyethylene oxide copolymer, a poly Propylene oxide copolymers, and polyvinylidene fluoride copolymers. [0033] The term " copolymer "

Such a polymer substance may be composed of a solution of a polymer substance dissolved in a soluble solvent. The soluble solvent may be selected from the group consisting of water, alcohols and mixtures thereof, and examples thereof include water, methanol, ethanol, propanol, isopropanol, butanol, acetone, tetrahydrofuran, toluene or dimethylformamide, dimethylsulfoxide, N, N-dimethylformamide, 1-methyl-2-pyrrolidone, trimethylphosphate, and mixtures thereof.

However, the above-mentioned polymer material and polymer material solution are illustrative, and the technical idea of the present invention is not limited thereto.

Manufacturing process of nanofiber fibers by single spinning process

The specific process in which single emission is performed using the single nozzle 20a of Fig. 7 (a) is as follows.

First, a substrate for collecting the nano-calorific fiber structure 50 radiated from the single nozzle 20a is disposed. The substrate may be the collector substrate 40 of FIG. 6 or a separate substrate disposed on the collector substrate 40. In the case of a substrate separate from the collector substrate 40, the substrate may include the conductive material and have the same voltage state as the collector substrate.

The spinning solution supplied from the spinning solution tank 10 is electrospun onto the substrate.

The spinning solution used in the single spinning process may be the above-described nanomaterial solution or a mixed solution in which the solution of the polymer material is mixed with the nanomaterial solution described above. The spinning solution may be in a gel state.

The voltage applied during electrospinning may vary depending on, for example, the type of the nanomaterial, the type of the polymer material, the type of the substrate, the process environment, and the like, and may range, for example, from about 100 V to about 30,000 V.

The nano-calorific fiber structure 50 formed by electrospinning can be arranged to form a one-dimensional, two-dimensional or three-dimensional network structure that is formed on the substrate and overlapped and connected to each other. For example, the nano-calorific fiber structure 50 may form a one-dimensional network structure in which a plurality of linear-shaped structures are connected in parallel to each other and connected in a linear shape, and a plurality of linear- Dimensional network structure in which a plurality of linear structures are overlapped and connected to each other with a predetermined angle so as to form a three dimensional network A structure can be formed. Further, the nano-calorific fiber structure 50 may have a shape having a predetermined pattern, for example, a mesh shape, or may be arranged to have a web shape.

Next, an annealing process may be selectively performed to fix the deformation of the inside of the nano-calorific fiber structure 50 arranged on the substrate and to uniformly arrange the materials. The annealing can be performed by appropriately heating the nano-calorific fiber structure 50 in a predetermined temperature range by a heat treatment method of heating to a certain temperature and gradually cooling.

By increasing the bonding force between the nanomaterials included in the nano-calorific fiber structure 50 by the annealing process, the nano-calorific fiber structure 50 can be formed of the nano-calorific fiber F shown in Fig.

The annealing may be performed in an atmospheric air atmosphere, an inert atmosphere containing argon gas or nitrogen gas, or a reducing atmosphere containing hydrogen gas. The annealing process may be omitted as an option or may be performed stepwise several times.

Fabrication of nano-exothermic fiber by single spinning coating process

A specific process in which a single spin coating is performed using the single nozzle 20a of Fig. 7 (a) is as follows.

First, a substrate for collecting the nano-calorific fiber structure 50 radiated from the single nozzle 20a is disposed. Since the step of disposing the substrate is the same as that described in the 'method of manufacturing a nano-exothermic fiber according to the single spinning process', a duplicate description will be omitted.

The spinning solution supplied from the spinning solution tank 10 is electrospun onto the substrate.

The spinning solution used in the single spinning coating process may be a solution of a selected one of the nanomaterial solution and the polymer solution described above. The spinning solution may be in a gel gel state.

As described above in the 'method of manufacturing a nano-exothermic fiber according to a single spinning process,' the voltage applied during electrospinning can be changed according to the type of the nanomaterial, the type of the polymer material, the type of the substrate, Such as from about 100 V to about 30,000 V, for example.

Next, a coating layer is formed on the radiated nanofibers so as to surround at least a part of the radiated nanofibers by spray-spinning the nanofibers solution and another solution in the solution of the polymer solution and the electrospun solution.

As described above, since the spinning mode or the spray mode can be performed according to the magnitude of the voltage to be applied, depending on the viscosity of the spinning solution, the physical properties such as the solute and the kind of solution using the electrospinning device, By forming the coating layer in spray mode on the spun nanofibers, a dual nano-calorific fiber structure 50 configured to form different layers of nanomaterials and polymeric materials can be produced.

For example, the polymer fiber including the polymer material may be located on the inner side and the coating layer including the nanomaterial may be located on the outer side of the polymer fiber. Alternatively, the nanofiber including the nanomaterial may be located on the inner side A coating layer containing a polymer material may be formed in a double structure in which the coating layer is surrounded and surrounded by the nanofibers. Here, the coating layer may be formed to completely surround the radiated nanofibers, or may be formed so as to surround a part of the nanofibers emitted so that a part of the radiated nanofibers is exposed to the outside.

The nano-emissive fibrous structure 50 formed by the single spinning coating may be arranged to form a one-dimensional, two-dimensional or three-dimensional network structure formed by overlapping and connecting to each other on the substrate. By the annealing process described above, The exothermic fiber structure 50 may be formed of a nano-exothermic fiber F having a length in the range of about several micrometers to several hundreds of micrometers.

On the other hand, a sintering process may be performed to selectively remove the polymer material in the nano-calorific fiber structure 50 of the double layer. When the polymer material is removed by the sintering process, rod-type or hollow-type nano-calorific fibers can be produced.

That is, when the nano-calorific fiber structure 50 is formed to have a double-layer structure such that the polymer material surrounds the nanomaterial, when the polymer material is sintered and removed, finally the nano-calorific fibers F are formed do. On the other hand, when the nano-calorific fiber structure 50 is formed in a bilayer structure such that the nanomaterial is surrounded by the polymer material, when the polymer material is removed under sintering, the nano-calorific fiber F is finally formed in a rod shape.

The sintering method for removing the polymer material may be chemical sintering, light sintering and heat sintering.

The chemical sintering means sintering in such a manner that the polymer material is melted by impregnating a nano-exothermic fiber structure (50) in which a polymer material and a nanomaterial form a double layer in an organic solvent capable of melting a polymer material.

Here, the organic solvent may include all kinds of solvents capable of dissolving the polymer material. The organic solvent may be an alkane such as hexane, an aromatic such as toluene, an ether such as diethyl ether, an alkyl halide such as chloroform, an ester, an aldehyde, a ketone, an amine, an alcohol, an amide, And water. The organic solvent is, for example, acetone, fluoroalkane, pentane, hexane, 2,2,4-tricetylpentane, decane, cyclohexane, cyclopentane, diisobutylene, 1-pentene, carbon disulfide, carbon tetrachloride Chlorobutane, diisopropyl ether, 1-chloropropane, 2-chloropropane, toluene, trichlorobenzene, benzene, bromoethane, diethyl ether, diethyl sulfide, chloroform, But are not limited to, dichloromethane, 4-methyl-2-propanone, tetrahydrofuran, 1,2-dichloroethane, , At least one selected from the group consisting of dimethylsulfoxide, aniline, diethylamine, nitromethane, acetonitrile, pyridine, 2-butoxyethanol, 1-propanol, 2-propanol, ethanol, methanol, ethylene glycol and acetic acid One can be included.

The light sintering is performed by irradiating the light of a desired wavelength range (or the entire area) with a constant energy for 1 second to several seconds by using a xenon lamp or the like, thereby removing the polymer material for a short time using light and forming a network of nanomaterials .

In the photo-sintering process, light pulse, on-time, turn-off time, voltage and wavelength range are important control variables.

The light sintering may be performed within a few seconds, and thus may be repeatedly performed as needed.

The heat sintering means sintering in such a way that the polymer material is melted by heating the nano-exothermic fiber to a temperature range above the melting point of the polymer material.

For example, it is possible to heat-sinter at a high temperature of 500 ° C or higher to melt the polymer material and allow the nanomaterials to form networking with each other. However, when a general glass substrate or a plastic substrate having a low melting point is used, a process of heat sintering at a high temperature can not be used. Therefore, it is necessary to pay attention to the selection of the substrate when employing the heat sintering method.

Fabrication of nano-exothermic fibers by dual spinning process

The specific process in which the double spinning is performed using the double nozzle 20b of FIG. 7 (b) is as follows.

The dual nozzle 20b may include a first nozzle 21 for emitting a first radiation material and a second nozzle 22 for emitting a second radiation material. The first nozzle 21 is connected to a first tank 11 containing a first radiation material and the second nozzle 22 is connected to a second tank 12 containing a second radiation material. The double nozzles 20b allow the first and second radiation materials to be radiated simultaneously without mixing.

The double nozzle 20b includes a first nozzle 21 and a second nozzle 22 formed so as to surround the first nozzle 21 so that the distance between the first nozzle 21 and the second nozzle 22 Axis are coaxial double structure nozzles configured to coincide with each other. The double nozzle 20b of the present invention is not limited to the coaxial double nozzle but may be a double nozzle 20b in which the first nozzle 21 and the second nozzle 22 are arranged in parallel, It is needless to say that the nozzle can be changed into a double nozzle of the type.

First, a substrate for collecting the nano-calorific fiber structure 50 radiated from the double nozzle 20b is disposed. The step of disposing the substrate is the same as that described above in the ' method of manufacturing a nano-exothermic fiber according to the single spinning process "

The first and second spinning solutions supplied from the first tank 11 and the second tank 12 are doubly electrospun on the substrate.

The first spinning solution can be simultaneously spinning the second spinning solution and have the same spinning length. Also, the second spinning solution may be radiated by surrounding the outer side of the first spinning solution, and the first spinning solution may be located inside the second spinning solution. Accordingly, the nano-calorific fiber structure 50 accommodated in the substrate may have a bilayer structure in which the first spinning solution is located inside and the second spinning solution surrounds the outer side of the first spinning solution.

Here, the first spinning solution may be a nanomaterial solution, the second spinning solution may be a polymer material solution, or the second spinning solution may be a polymer material solution and the second spinning solution may be a nanomaterial solution. As described above, the types of the first spinning solution and the second spinning solution may be selected depending on whether the nano-exothermic fiber to be manufactured according to the electrospinning process of the present invention is a rod type or a hollow type. .

In order to easily form the coaxial double layer nano-calorific fiber structure 50, it is preferable that the first spinning solution and the second spinning solution should not be mixed with each other, so that spinning is performed under the following conditions.

The injection and spinning speed of the second spinning solution on the outside may be equal to or larger than the injection and spinning speed of the first spinning solution on the inside. At least one of the first spinning solution and the second spinning solution needs to have conductivity, and the vapor pressures of the first spinning solution and the second spinning solution should be the same or similar. In addition, the viscosity of the first spinning solution must be equal to or greater than the viscosity of the second spinning solution.

For example, in the double spinning process of the present invention, the injection and spinning rate of the first spinning solution is in the range of 0.1 ml / hour to 1.5 ml / hour, the injection and spinning rate of the second spinning solution is in the range of 1.5 ml / hour to 3.5 ml / hour Lt; / RTI > However, such an injection rate is an exemplary one, and the technical idea of the present invention is not limited thereto.

According to the above-described 'method for producing a nano-exothermic fiber according to the double spinning process, the nano-calorific fiber structure 50 is formed in a double layer structure so that the polymer material surrounds the nanomaterial or the nanomaterial surrounds the polymer material. The nano-heat-generating fiber structure 50 may be arranged so as to form a one-dimensional, two-dimensional or three-dimensional network structure formed by being overlapped and connected to each other on the substrate. By the annealing process, (50) may be formed of nano-exothermic fibers (F) having a length in the range of about several micrometers to several hundreds of micrometers.

The thus formed double-layered nano-calorific fiber structure 50 may be formed of a rod-type or hollow-type nano-calorific fiber F by selectively sintering the polymer material. The sintering process is the same as the sintering process according to the 'method for manufacturing nano-exothermic fiber according to the single spinning coating process' described above, so a duplicated description will be omitted.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100 ... Cooking container
101 ... home
110 ... The container body
120 ... Heating layer
121 ... electrode
130 ... Protective layer
140 ... The cover member
150 ... handle
151 ... Power supply
152 ... The fastening portion
152a ... projection part
152b ... Forceps
10 ... Spinning solution tank
11 ... The first tank
12 ... The second tank
20 ... Spinning nozzle
20a ... Single nozzle
20b ... Double nozzle
21 ... The first nozzle
22 ... The second nozzle
30 ... External Power
40 ... Collector substrate
50 ... Nano-heating fiber structure

Claims (8)

1. A cooking container having a heating layer for supplying heat to a cooking object accommodated in the cooking cavity,
A container body accommodating a cooking object and formed of a thermally conductive material; And
A radiating material containing at least one of a nanomaterial and a polymer material is arranged to cover at least a part of an inner circumferential surface or an outer circumferential surface of the container body so as to directly heat the cooking object or to heat the object to be cooked via the container body, a heating layer formed by electrospinning; / RTI >
Wherein the heating layer is configured to be electrically connected to a network at a point where a plurality of nano-calorific fibers formed by electrospinning the radiating material intersect with each other to form a network. The method according to claim 1,
A handle having a power supply for supplying electric power to the heating layer; Further comprising:
Wherein the heating unit is electrically connected to the power supply unit. 3. The method of claim 2,
Wherein the handle is detachably attached to the cooking cavity. The method according to claim 1,
And a protective layer formed to surround the heating layer. The method according to claim 1,
Characterized in that the nanomaterial is silver nanoparticles (Ag nanoparticles). The method according to claim 1,
Wherein a density of the nano-exothermic fibers is determined so that the heating layer generates heat in a temperature range of 80 ° C to 300 ° C when a voltage of 10V to 300V is supplied to the heating layer. The method according to claim 1,
Wherein the nano-sized heating fibers are formed to occupy 30% to 90% of the area of the container body. The method according to claim 1,
Characterized in that the heating layer is formed by co-electrospinning the radiating material.

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