KR20020037198A - Electric heating panel using current-uniforming band and carbon powder which consist of shell-type particles, and its production method - Google Patents

Abstract

PURPOSE: An electrical hypocaust panel is provided to uniformly heat the room by minimizing the temperature variation in the entire hypocaust panel with the uniform conductivity. CONSTITUTION: A wood plate(11) is coated by a waterproof layer(12) in one side of the wood plate(11). Electrodes(13A,13B) are attached to both sides of the waterproof layer(12) to be parallel with current uniform bands(14). A conductive paint layer(15) is formed to impregnate the electrodes with the current uniform bands(14) at the upper surface of the waterproof layer(12). The waterproof layer(16) surrounds an entire surface of the electrical hypocaust panel(1).

Description

Electric heating panel using current-uniforming band and carbon powder which consist of shell-type particles, and its production method}

The present invention relates to an electric heating floor for floor heating and a method of manufacturing the same. More specifically, a conductive paint containing carbon in the form of a hexagonal plate, which is very thin in thickness compared to the width and length, is coated on one surface of the wood plate as a heating element. The present invention relates to an electric ondol panel using a current homogenizing band and a hexagonal plate-shaped carbon, in which a metal current equalization band is impregnated at regular intervals in a coating layer of a conductive paint to minimize the exothermic temperature variation of the entire ondol panel.

In addition to improving living standards, as conventional heating fuels change from coal to oil or gas, the traditional ondol disappears and a radiator is used to heat the room air, or to install a hot water pipe on the floor to achieve the effect of conventional ondol. Heating is carried out by heating.

However, the heating method not only has a disadvantage in that fuel costs are higher than that of coal, it is cumbersome to install and maintain hot water pipes required for heating, and deterioration in heating efficiency due to ageing of pipes is inevitable with time. In addition, when heating is required for a short time in a season other than winter, there is more inconvenience in consuming fuel per unit time than in the case of continuous heating in winter, and there is an inconvenience of having to operate a heating device for short heating. There is also the administrative hassle that an individual must check and replenish the amount of fuel.

Therefore, an electric floorboard using a heating wire has been developed for auxiliary heating, and further, an electric ondol panel and an electric concrete, which are easy to install on the floor and can be heated without the hot water pipe and the boiler, have been developed.

However, in the case of the electric sheet, the physical properties of the outer skin such as synthetic resin or synthetic fiber are not easy to damage the outer skin itself, and there is a risk of leakage or fire due to breakage or short circuit of the heating wire. There is a disadvantage in that even heating occurs in a large amount and uniform heating is not possible due to the heating wires arranged at regular intervals, it is only used within a limited range for auxiliary heating.

In Korea, where sedentary living is the main lifestyle, heating is preferred, such as traditional ondol, which has developed various ondol panels and heat-concrete concrete for easy installation and easy management. There are the following problems.

In the case of a hot water panel paneled with a conventional hot water pipe, it is more convenient in terms of installation and maintenance than a conventional hot water pipe installation method, but requires a boiler and external connection piping to operate the hot water panel, and seasonal heating according to the boiler operation. Besides the difference in efficiency, boiler management and the possibility of water leakage in hot water pipes are very similar to the conventional hot water pipe installation method.

Although a heat transfer panel having a heating wire attached to the foamed resin layer is disclosed in Korean Utility Model Publication No. 94-2244, this heat transfer panel may be easily damaged by external shock and pressure due to insufficient strength of the polyurethane foam. The upper plate composed of iron plate is corroded by moisture impregnation or plastic deformation due to external load, so that the overall appearance cannot maintain the initial flat plate shape. In addition, there is a disadvantage in terms of environmental and recycling in accordance with the use of foamed polyurethane resin.

In addition, in the case of electrically conducting concrete plate, it has various advantages in heating the entire floor using electricity, but its own weight is not only heavy due to the characteristics of concrete, and it is particularly vulnerable to external impact, and the plate is warped by moisture absorption or heat. Deformation, etc. may occur, and it is not easy to adjust the thickness and amount of carbon incorporated into the conductive concrete plate for the heating temperature and temperature uniformity of the entire plate.

In addition, although a method for manufacturing a conductive heating element is disclosed in Korean Patent Publication No. 94-1521, this method uses spherical carbon particles to make the bonding structure of the carbon particles in point contact so that the conductivity becomes poor. Therefore, in order to impart proper conductivity to the conductive heating element, a larger amount of carbon particles should be used than when the carbon particles are in surface contact.

Korean Utility Model Publication No. 99-1627 discloses an electrothermal paint ondol heating device, which is formed by forming an exothermic coating film made of carbon powder or the like between electrodes attached to both sides of an electrical insulating film. As it increases, there is a disadvantage that the heating temperature deviation for each location increases.

A common disadvantage of the conventional panel-type ondol heating apparatus discussed above is a variation in floor temperature, and in the case of a pipe type, a temperature difference between a place where a pipe passes and a place where a pipe passes does not necessarily occur.

In the case of using carbon powder, the electrical conductivity is reduced by the point contact bonding of the carbon particles by using spherical carbon particles, and as a result, a large amount of carbon particles must be used to obtain a predetermined conductivity. In addition, since the carbon powder impregnated in a binder such as a synthetic resin cannot be substantially completely uniformly dispersed, the resistance value of each ondol panel is changed, which is smaller than the piping type, but this method also inevitably generates a temperature deviation.

As described above, the present invention is to solve all the problems of the conventional ondol heating panel, by minimizing the temperature variation of the entire ondol panel by using a heat transfer paint composed of hexagonal plate-shaped carbon particles and a metal current equalization band. It is an object of the present invention to provide an electric ondol panel which is strong in impact and the like and which is easy to install by using a substrate on which the electrothermal paint is coated is made of wood.

1 is a partially cutaway perspective view of the ondol panel of the present invention.

2 is a cross-sectional view of the present invention ondol panel.

3 shows carbon particles dispersed in a conductive paint layer,

(A) is a partial schematic diagram showing the dispersion form of spherical carbon particles.

(B) is a partial schematic diagram which showed the dispersion form of the hexagonal plate-shaped carbon particle.

Figure 4 is a conceptual diagram showing the current flow of the ondol panel of the present invention.

((Explanation of symbols for main part of drawing))

1.Electric Ondol Panel 11.Wood Board

12,16. Waterproof insulating layer 13A, 13B. electrode

14. Current equalization band 15. Conductive paint layer

31. Spherical carbon particles 32. Hexagonal carbon particles

The above object of the present invention is carried out after the coating and the current uniformity band made of metal impregnated in the conductive paint coating layer containing the carbon powder comprising a wood plate, a fine hexagonal plate-like carbon particles as a substrate of the electric ondol panel By vibrating the substrate.

The electric ondol panel of the present invention is composed of a wood plate of the substrate on which the coating coating layer is formed, thereby reducing the weight of the ondol panel, improving the absorption ability against external impact, and excellent thermal insulation and insulation in terms of wood properties.

The conductive paint is a mixture of carbon powders composed of hexagonal plate-like particles in a synthetic resin mixture obtained by mixing a solvent, such as thinner, with a synthetic resin such as polyester, epoxy, polyamide, and silicone, and is used horizontally and vertically. Compared with the technical features of the present invention, the use of carbon particles in the form of hexagonal plates, which are very thin and cannot be made upright, in comparison.

The hexagonal plate-shaped carbon particles are uniformly distributed in a state of collapse in the synthetic resin mixture having a very low viscosity, so that unlike the spherical carbon particles that are in point contact, the carbon particles maintain a surface contact state and thus a small amount of carbon. Particles can also ensure proper electrical conductivity.

However, it is practically impossible to disperse the hexagonal plate-shaped carbon particle distribution so as to be completely uniform throughout the ondol panel. Therefore, the electric current flowing through the entire ondol panel is changed according to the position of the inside of the panel by the resistance value whose magnitude varies depending on the position according to the degree of dispersion of carbon. Differences occur, which results in an uneven temperature distribution of the ondol panel.

Therefore, at least one or more electrical ondol panels of the present invention have a metal current equalization band perpendicular to the direction of current flow in the conductive paint between the electrodes installed at both ends of the panel in order to minimize the temperature deviation. There is another technical feature of the invention in impregnation.

That is, the current whose magnitude is changed by the minute conductivity difference of the conductive paint according to the position of the direction perpendicular to the flow direction of the current flowing from one electrode to the other electrode (hereinafter referred to as "width direction") is different from that of the current equalization band. The uniformity within the current equalization band at the time of contact minimizes the variation in the magnitude of the current in the width direction where the current in the width direction gradually increases while flowing from one electrode to the other electrode. Therefore, the heat generation amount and temperature difference according to the panel position is almost uniform.

In addition, in the method of manufacturing the electric ondol panel of the present invention, at least one current equalization band is disposed on the surface of the wood substrate before coating the conductive paint at regular intervals between the two electrodes, but is perpendicular to the current flow direction. Is placed parallel to and coated with a conductive paint thereon, so that a sufficient vibration is applied to the substrate to more uniformly disperse the hexagonal plate-shaped carbon particles contained in the conductive paint and at the same time lay down. There is a characteristic.

The purpose and detailed technical features and operational effects of the present invention will be clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

A partially cutaway perspective view of the electric ondol panel of the present invention is shown in FIG. 1 and a sectional view in FIG. 2.

As shown in the drawing, the electric ondol panel 1 of the present invention is coated with a waterproof insulating layer 12 on one surface of a wood board 11 such as a general wood board, plywood, or MDF. 13A and 13B electrodes 13A and 13B are formed at both ends of the upper surface of the waterproof insulating layer 12, and at least one metal current equalization band 14 is formed between the two electrodes according to the size of the wood plate. And a conductive paint layer 15 uniformly dispersed with carbon powder composed of hexagonal plate-shaped carbon particles so as to be impregnated on the upper surface of the insulating layer 12 to which the electrode and the current equalization band are attached. ) Is formed, and the waterproof insulating layer 16 surrounds the entire surface of the panel formed up to the conductive paint layer.

At this time, looking at the role of the hexagonal plate-shaped carbon particles, which is also a feature of the present invention ondol panel as follows.

In the case of using the carbon powder composed of spherical carbon particles 31 as shown in Figure 3, the contact form between the particles is in the form of a point contact form, the conductivity is low, a large amount of carbon powder is required, but in the form of a hexagonal plate In the case of the carbon particles 32, the contact between the particles is in the form of surface contact, thereby improving conductivity.

The conductive paint in which the carbon powder composed of carbon particles in the hexagonal plate shape is uniformly dispersed is composed of a synthetic resin, a solvent, and the carbon powder. However, the conductive conductive layer, which has been finally formed, is dried by evaporating the solvent, thereby drying the synthetic resin and carbon. It becomes a composite of powder and the thickness is 0.2-0.5 mm.

The resistivity value of the conductive paint layer constituting the electric ondol panel using the current equalization band and the hexagonal plate-shaped carbon of the present invention should satisfy the following Equation 1.

Where ρ is the resistivity, R is the resistance, A is the area of the conductive paint layer,

w: width of conductive paint layer, l: length of conductive paint layer, t: thickness of conductive paint layer

The resistivity value is an experimental value for properly generating the conductive paint layer. When the thickness of the conductive paint layer is less than 0.2 mm in a state where the width and length of the conductive paint layer are constant, the coating material may be used to obtain a predetermined resistivity required for the conductive paint layer. The amount of carbon particles contained in the layer should be increased, but at this time, the amount of carbon particles in the conductive paint is 40 wt% or more, so that the viscosity of the conductive paint is increased, thereby making it impossible to obtain a homogeneous paint and increasing the brittleness of the paint layer. do.

And, if the thickness of the conductive paint layer exceeds 0.5mm, the amount of the paint is increased not only long drying time but also increase the frequency of occurrence of cracks during drying, economic efficiency is reduced.

Moreover, since the possibility that the heat generation temperature of the electrically conductive paint which is a heat generating body exceeds the appropriate heating temperature cannot be completely excluded, it is also preferable to provide a thermal prevention device in an ondol panel.

The two electrodes 13A and 13B to which power from the outside is applied are connected to a power line (not shown) passing through the waterproof insulation layer 16, the wood plate 11, and the insulation layer 12. The role of the current equalization band 14 not directly connected to the power source will be described with reference to FIG. 4, which schematically illustrates the flow of current.

The current applied to the one electrode 13A has a constant size (A) throughout the electrode and is transferred to the conductive paint, and the current delivered to the conductive paint differs in the fine dispersion concentration of the hexagonal plate-shaped carbon powder contained in the conductive paint. As a result of the size change, the current magnitude A 'for each width direction is not constant, and as a result, a difference occurs in the amount of heat generated for each panel location.

However, the electric current which generate | occur | produced the deviation by the width direction position through the conductive paint becomes uniform in the width direction at the time of contact with the metal current equalization band 14 which is a conductor, and flows back to a conductive paint in a uniform state. That is, the current equalization band 14 serves to minimize the temperature variation for each position of the entire panel by uniformly equalizing the current for each position in the width direction that inevitably changes in size while passing through the conductive paint.

The metal current equalization band is preferably copper or aluminum having excellent electrical conductivity and relatively inexpensive, and having a thickness of 0.1 to 0.5 mm and a width of 5 to 20 mm.

According to the present invention, there is provided a method for manufacturing an electric ondol panel using the current uniforming band and hexagonal plate-shaped carbon, comprising the steps of cutting a wooden board to a predetermined standard, coating a waterproof insulating layer on an upper surface of a wooden board, Processing a power lead insertion groove on a wood plate coated with a waterproof insulating layer, installing an electrode and a current equalization band on one side of the wood plate, connecting the electrode and the power line, and closing the power lead insertion groove Processing, applying a conductive paint to one side of the wood plate provided with the electrode and the current equalization band, applying a vibration to the wood plate coated with the conductive paint, primary natural drying and secondary hot air drying And a second waterproof insulation coating on both the upper and lower surfaces and the side surfaces of the wood plate on which the conductive phase paint layer is formed.

And, in each step of the manufacturing method there is a step of applying a conductive paint on one side of the wood plate with the electrode and the current equalization band and then applying a vibration to the wood plate coated with the conductive paint, in this case contained in the conductive paint It is very important to apply sufficient vibration to the wood board so that the carbon particles in the form of hexagonal boards are laid on the floor of the wood board.

As described above, in the ondol panel of the present invention, carbon particles having a hexagonal plate shape and a current equalization band are applied, thereby minimizing temperature variation of the entire ondol panel by uniform conductivity, thereby enabling uniform heating.

In addition, since the panel of the panel is made of wood, the weight of the panel is reduced, so it is not only easy to transport and install, but also has excellent shock absorption, so that not only the floor heating materials of general residential buildings but also classrooms, kindergartens, preschools, senior homes, churches, restaurants, etc. It is suitable as a floor heating material.

Claims (4)

As the electric ondol panel, a waterproof insulating layer 12 is coated on one surface of the wood plate 11, and electrodes 13A and 13B are provided at both ends of the upper surface of the waterproof insulating layer 12, and at least between the two electrodes. At least one metal current equalization band 14 is attached in parallel with both electrodes 13A and 13B, and at least on the upper end of the electrode and current equalization band on the upper surface of the insulating layer 12 to which the electrode and the current equalization band are attached. It is characterized in that the conductive paint layer 15 is filled with a uniformly dispersed carbon powder consisting of hexagonal plate-shaped carbon particles up to the height, and the waterproof insulating layer 16 wraps the entire surface of the panel formed up to the conductive paint layer. An electric ondol panel using a current equalization band and hexagonal carbon. According to claim 1, wherein the current equalization band is a copper or aluminum material, electric current heating band using a current equalizing band and hexagonal plate-shaped carbon, characterized in that the thickness is 0.1 to 0.5mm, the width is 5 to 20mm. The electric ondol panel according to claim 1, wherein the conductive paint layer is a composite of synthetic resin and carbon powder, and has a thickness of 0.2 to 0.5 mm. The method of manufacturing the electrical ondol panel of claim 1, comprising the steps of cutting the wood board to a certain standard, coating a waterproof insulation layer on the upper surface of the wood plate, and inserting a power connection line insertion groove into the wood plate coated with the waterproof insulation layer. Processing, installing an electrode and a current equalization band on one side of the wood plate, connecting the electrode and the power line, finishing the power connection line insertion groove, and a wood plate provided with the electrode and the current equalization band Applying a conductive paint on one side of the surface, applying a vibration to the wood plate coated with the conductive paint, drying the first natural drying and the second hot air, and the upper and lower surfaces of the wood plate on which the conductive paint layer is formed. A method for producing an electric ondol panel using carbon in the form of a hexagonal plate and a current uniformity band, characterized in that the step of the second waterproof insulating coating on both sides.