KR20200122839A - Portable cooking utensils using surface heating elements - Google Patents

Abstract

The present invention relates to a portable cooker using a planar heating element, and more particularly, it is used when cooking water or food during outdoor activities such as camping and fishing. It relates to a portable cooker using a planar heating element that is safe and convenient to use, which prevents the occurrence of fire because the burned fire is not exposed to the outside.
To this end, the present invention provides a planar heating element that generates heat by an applied power source and a signal, an insulating layer disposed on one side of the planar heating element, and a protective layer that surrounds and protects the planar heating element and the heat insulating layer, It includes a control unit for controlling the degree, and the protective layer is formed by mixing a buffer material and a thermally conductive medium, and as a buffer material, an epoxy resin, an acrylic resin, a phenol resin, a melamine resin, a silicone resin, silica, carbon nitride, poly It includes any one selected from sulfone, Teflon or low-melting glass, and with respect to the total 100 parts by weight of the protective layer, the buffer material comprises 50 to 95 parts by weight, and the thermally conductive medium comprises 5 to 50 parts by weight. do.

Description

Portable cooking utensils using surface heating elements

The present invention relates to a portable cooker using a planar heating element, and more particularly, it is used when cooking water or food during outdoor activities such as camping and fishing. It relates to a portable cooker using a planar heating element that is safe and convenient to use, which prevents the occurrence of fire because the burned fire is not exposed to the outside.

Planar heating element means an object that generates heat in the state of a surface. After installing metal electrodes on both ends of a thin surface conductive heating element, insulating with an insulating material and applying a rated voltage to the metal electrode, the entire surface is It is designed to generate heat, and it is used in heating and heating cookers due to its high energy consumption efficiency and low volume.

In addition, since the planar heating element is easy to construct and can be used by bonding with insulation materials and panels depending on the type of raw material, its application is wide.

Such a planar heating element includes a metal heating element and a non-metallic heating element, and a seed heater, a far-infrared ray heater, a ceramic heater, a quartz tube heater, a nickname heater, a halogen heater, a carbon nanotube heater, etc. are also collectively referred to as a heating element.

As a problem of the currently known surface heating element, since most of the heat generated from the heating element is transferred by convection of the surrounding air, the efficiency decreases depending on the usage time, so that a stable temperature cannot be maintained, and energy loss is large. In particular, when the temperature rises, the heating element may be wired or deformed in some cases, resulting in a problem in that the heating element cannot function or the performance is significantly deteriorated. In addition, in the case of heating elements such as heating elements and chemicals used in water, there is a problem of short replacement cycles due to poor durability.

On the other hand, portable burners are mainly used to cook water or food during outdoor activities such as fishing and camping.In the case of portable burners, the burned fire is extinguished by the wind or changed to a diagonal direction instead of a straight line, so heating efficiency is reduced. It is not good, and there is a problem of fire occurrence when there is a combustible material around it, and when the outdoor temperature in winter is low, butane gas, a raw material of the portable burner, rapidly decreases during use, resulting in a problem in which the fuel consumption efficiency decreases rapidly.

In addition, since the use of portable cooking utensils is limited during mountaineering, there is a problem in that it is impossible to eat hot beverages other than storing and drinking warm beverages in a normal thermos.

Republic of Korea Patent Registration No. 10-1065281 relates to a'portable range', comprising a planar heating layer that receives electrical energy and converts it into thermal energy, and includes a translucent range body formed in a flexible sheet form to be bent, and the range It includes a control unit configured to control the degree of heat generation of the main body.

The prior art constructed as described above improves the convenience of handling because it can be unfolded and used or rolled and stored, but the degree of heat generation of the planar heating layer is controlled by the supplied voltage from the controller. In other words, regardless of the size of the container placed on the planar heating layer, since the entire surface heating layer generates heat, there is a problem in that the heating efficiency is lower than the consumed voltage.

In addition, since the base layer on which the planar heating layer is disposed and the protective layer protecting the planar heating layer are formed of a heat-resistant resin series, there is a problem that deformation occurs due to heat during use time.

Korean Patent Registration No. 10-1065281

The present invention is proposed in order to solve the above problems, by arranging a plurality of planar heating elements at mutually spaced positions to control the planar heating elements that generate heat according to the size of the container, and a convection space in which air is filled between the planar heating elements To increase the heat generation efficiency,

An object of the present invention is to provide a portable cooker using a planar heating element including a protective layer in which contact resistance is reduced and a buffer material and a thermally conductive medium are mixed to keep the binding firmly.

In order to achieve the above object, the present invention,

A planar heating element that generates heat by the applied power and signal,

A heat insulating layer disposed on one side of the planar heating element,

A protective layer disposed to surround the planar heating element and the heat insulating layer to protect them, and

It includes a control unit for controlling the heat generation degree of the planar heating element,

The protective layer,

It is formed by mixing a buffer material and a thermally conductive medium,

As a buffer material, it includes any one selected from epoxy resin, acrylic resin, phenol resin, melamine resin, silicone resin, silica, carbon nitride, polysulfone, Teflon or low melting point glass,

With respect to the total 100 parts by weight of the protective layer, the buffer material is characterized in that it comprises 50 to 95 parts by weight, the thermally conductive medium is 5 to 50 parts by weight.

In addition, the thermally conductive medium,

It is characterized by including any one selected from metal oxides such as aluminum oxide, boron nitride, aluminum nitride, magnesium oxide, zinc oxide, silicon carbide, quartz, and aluminum hydroxide, metal nitride, metal carbide, and metal hydroxide.

In addition,

The planar heating element,

A plurality of dogs are arranged to generate heat independently at positions spaced apart from each other,

It is characterized in that a convection space filled with air is formed between each planar heating element.

The present invention has the advantage of reducing the contact resistance and not only being able to firmly maintain the binding between the planar heating element and the heat insulating layer, but also maximizing the heating efficiency by selecting the planar heating element that generates heat according to the size of the container.

1 is an exemplary view showing a portable cooker using a planar heating element according to the present invention.
Figure 2 is an exemplary view showing a cross-section of a portable cooker using a planar heating element according to the present invention.
Figure 3 is an exemplary view showing another embodiment of the present invention.
Figure 4 is an exemplary view showing a folded state of the portable cooker using the planar heating element according to the present invention.

Hereinafter, other objects and features of the present invention in addition to the above objects will be clearly revealed through the description of the embodiments with reference to the accompanying drawings.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

Hereinafter, a preferred embodiment of a portable cooker using the planar heating element according to the present invention will be described with reference to the accompanying drawings.

First, the portable cooker 1 using the planar heating element according to the present invention,

As shown in Figure 1, the planar heating element 10 that generates heat by the applied power and signal,

A heat insulating layer 20 disposed on one side of the planar heating element 10,

The planar heating element 10 and the heat insulating layer 20 are wrapped around the protective layer 30 to protect them and

It includes a control unit 40 for controlling the degree of heat generation of the planar heating element 10.

The planar heating element 10 is made in the form of a square or rectangular mat, and a plurality of them are disposed at positions spaced apart from each other.

At this time, as shown, the planar heating element 10 includes a first planar heating element 11 disposed in the center, and a second planar heat generating element 12 and a second planar heating element disposed outside of the first planar heating element 11 It includes a third surface heating element 13 disposed on the outside of the heating element 12.

The first to third planar heating elements 10 may be formed in a form to which carbon, in particular, a carbon nanotube is attached, but is not limited thereto. In addition, the first to third planar heating elements shown in the drawings are composed of a square shape and a shape arranged at a predetermined interval from the outside thereof, but are not limited thereto, and various changes such as circle, triangle, and star shape are possible. Do.

Carbon nanotubes are hexagonal shapes made of six carbons connected to each other to form a tubular shape.The electrical conductivity is 100 to 1000 times better than that of copper, the thermal conductivity is the same as the highest diamond in nature, and the strength is 100 times superior to steel. It is known. Carbon fiber breaks even if it is deformed by only 1%, whereas carbon nanotubes have the property of maintaining their shape even if they are deformed by 15%.

In addition, as is known, the carbon nanotubes have a large amount of far-infrared radiation, and can improve the health of users around the portable cooker according to the present invention.

The heat insulating layer 20 is for blocking the heat generated from the planar heating element 10 from being radiated to the floor, and is made in the form of a square or rectangular mat, preferably, the first to third planar heating elements are heat insulating layers ( It is configured to be attached to the upper surface of 20).

The protective layer 30 is for protecting the planar heating element 10 and the heat insulating layer 20, which prevents moisture from penetrating into the planar heating element, and the weight of the container placed directly above the planar heating element 10 By dispersing, the planar heating element is prevented from being damaged.

To this end, the protective layer 30 includes a buffer material 31 and a thermally conductive medium 32.

The buffer material 31 is a material having elastic resilience, and as a buffer material, any one selected from epoxy resin, acrylic resin, phenol resin, melamine resin, silicone resin, silica, carbon nitride, polysulfone, Teflon or low melting point glass However, of course, it is not limited thereto.

Preferably, it is selected from epoxy resins known to have advantages such as adhesion, chemical resistance, corrosion resistance, and low cost due to excellent physical properties, or silicone resins known to be excellent in heat resistance, cold resistance, thermal stability, weather resistance, electrical properties, and chemical resistance. Either one may be applied, but is not limited thereto.

Most preferably, it is known that it has characteristics as a stress relief material due to its low Youngs modulus, so it is easy to reduce the stress generated by the thermal stress generated when the planar heating element is operated due to the difference in the thermal expansion coefficient of the final manufactured protective layer. A silicone resin that can be relaxed may be applied, but is not limited thereto.

The thermally conductive medium is for conducting heat generated during operation of the planar heating element 10,

It may include any one selected from metal oxides such as aluminum oxide, boron nitride, aluminum nitride, magnesium oxide, zinc oxide, silicon carbide, quartz, and aluminum hydroxide, metal nitride, metal carbide, and metal hydroxide.

Preferably, aluminum oxide, which is known to be excellent in price, handling stability, and storage properties, may be applied, but is not limited thereto.

At this time, the thermally conductive medium may be applied with an average particle diameter of 30 μm or less, but preferably a particle diameter of 10 μm or less is applied, and most preferably, a particle diameter of 5 to 100 nm is applied to stably disperse and maintain thermal conductivity. However, it is of course not limited thereto.

If the average particle diameter of the thermally conductive medium is 30㎛ or more is applied, the component of the thermally conductive medium is affected by gravity, so it is not possible to maintain the state evenly mixed in the buffer for a long time, as well as the thermal conductivity over time. There is a disadvantage that aggregation may occur due to an increase in the surface tension between the media particles.

The buffering material and the thermally conductive medium as described above include 50 to 95 parts by weight of the buffer material and 5 to 50 parts by weight of the thermally conductive medium based on 100 parts by weight of the total protective layer.

Preferably, the thermally conductive medium may be included in an amount of 10 to 40 parts by weight, but is not limited thereto.

If the cushioning material is included in an amount of less than 50 parts by weight, the manufacturing cost increases as the content of the thermally conductive medium increases, and there is a disadvantage that the adhesive strength of the final manufactured protective layer decreases. There is a disadvantage in that the content of the thermally conductive medium is relatively low, so that heat conduction is not easily performed.

Next, when less than 5 parts by weight of the thermally conductive medium is included, the thermal conductivity of the final protective layer is lowered due to low thermal conductivity due to the low thermal conductivity of a trace amount of the thermally conductive medium, and if it is included in more than 50 parts by weight, the thermal conductivity is maintained high. However, there is a disadvantage in that the adhesive strength is lowered by the content of the buffer material.

At this time, the thermally conductive medium may be dispersed in a solvent before mixing with the buffering material and then mixed with the buffering material.At this time, the applied solvent is selected from alcohols, aprotic solvents, and protic solvents. Either can be applied.

Preferably, alcohols that can be easily evaporated in the manufacturing process by lowering the manufacturing cost of the finally manufactured protective layer and low evaporation temperature may be applied, but are not limited thereto.

Optionally, it may be dispersed in a protonic solvent so as not to cause agglomeration by increasing the surface tension of the particles of the thermally conductive medium by the nature of alcohols or neutral solvents.

That is, the thermally conductive mediator particles having hydrophobicity can be formed to be changed into hydrophilicity by interacting with the proton solvent so that the dispersibility of the thermally conductive mediator particles in the solvent can be maintained high.

Specifically, when an alcohol solvent is applied, ethanol is applied, when a neutral solvent is applied, tetrahydrofuran is applied, and when a proton solvent is applied, alpha-terpinel can be applied. However, of course, it is not limited thereto.

Moreover, when the thermally conductive medium is dispersed in the solvent, it may be stirred by a stirrer, and optionally, stirring may be performed with any one of agitator selected from a rocking stirrer, a blade stirrer, a flow stirrer, an air stirrer, or an ultrasonic stirrer. .

Most preferably, by using an ultrasonic stirrer, it may be formed so that dispersion can be performed evenly in a short time, but is not limited thereto.

The solvent for dispersing the thermally conductive medium may be included in an amount of 5 to 50 parts by weight based on 100 parts by weight of the thermally conductive medium, so that dispersion may be performed.

Preferably, it may be included in an amount of 10 to 40 parts by weight, but is not limited thereto.

If the solvent is contained in an amount of less than 5 parts by weight based on 100 parts by weight of the thermally conductive medium, there is a disadvantage that the dispersion of the thermally conductive medium is not performed evenly depending on the amount of the solvent, and if it is contained in an amount of 50 parts by weight or more, the solvent is removed. There is a disadvantage that it takes a long time to do.

The control unit 40 controls the operation of the planar heating element 10, a switch for independently controlling the first to third planar heating elements and a circuit for controlling power supplied to the planar heating element through the operation of the switch Includes.

Since the configuration of such a switch and circuit is known, detailed illustration and description will be omitted.

The present invention made as described above can increase the heating efficiency by independently controlling the operation of a plurality of planar heating elements disposed at mutually spaced positions and selecting a planar heating element that generates heat according to the size of the container,

The planar heating element is protected from the outside through the above-described protective layer, and at the same time, there is an advantage of increasing the thermal conductivity of heat generated when the planar heating element is operated.

On the other hand, as shown in Figure 3, there is further provided a convection space 50 filled with air between a plurality of planar heating elements in the present invention, the convection space 50 is filled by heat generated by the operation of the planar heating element The resulting air is heated and configured to transfer heat to the vessel.

That is, since the container is heated through the heat generated from the planar heating element and the heat of the convection space 50, the container can be heated to a high temperature in a relatively short time, and furthermore, the convection space 50 in a state in which the operation of the planar heating element is stopped. ) By applying heat to the container during the time the temperature of the heated air is maintained.

As described above, in the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but this is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , If a person of ordinary skill in the field to which the present invention belongs, various modifications and variations are possible from these descriptions.

Therefore, the spirit of the present invention is limited to the described embodiments and should not be defined, and all things equivalent or equivalent to the claims as well as the claims to be described later belong to the scope of the spirit of the present invention. .

1: Portable cooker using a planar heating element
10: planar heating element
11: first surface heating element 12: second surface heating element
13: third-sided heating element
20: insulation layer
30: protective layer
40: control unit
50: convection space

Claims (3)

Planar heating element 10 that generates heat by the applied power and signal,
A heat insulating layer 20 disposed on one side of the planar heating element 10,
The planar heating element 10 and the heat insulating layer 20 are wrapped around the protective layer 30 to protect them and
It includes a control unit 40 for controlling the degree of heat generation of the planar heating element 10,
The protective layer 30,
It is formed by mixing a buffer material and a thermally conductive medium,
As a buffer material, it includes any one selected from epoxy resin, acrylic resin, phenol resin, melamine resin, silicone resin, silica, carbon nitride, polysulfone, Teflon or low melting point glass,
Portable cooker using a planar heating element, characterized in that, with respect to the total 100 parts by weight of the protective layer, the buffer material comprises 50 to 95 parts by weight, and the thermally conductive medium comprises 5 to 50 parts by weight.
The method of claim 1,
The thermally conductive medium,
Portable using a planar heating element comprising any one selected from metal oxides such as aluminum oxide, boron nitride, aluminum nitride, magnesium oxide, zinc oxide, silicon carbide, quartz, and aluminum hydroxide, metal nitride, metal carbide, and metal hydroxide Cooker.
The method of claim 1,
The planar heating element 10,
A plurality of dogs are arranged to generate heat independently at positions spaced apart from each other,
A portable cooker using a planar heating element, characterized in that a convection space 50 filled with air is formed between each planar heating element.

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