KR100651665B1 - Device for coating carbon liquid on palne heater - Google Patents

Abstract

The present invention relates to a planar heating element, and more specifically, a general fiber yarn and a carbon fiber yarn are woven in a net form to form a heat generating portion, and the carbon fiber yarn and a verb are partially woven into the heat generating portion as a conductive portion for conducting heat to the heat generating portion. The present invention relates to a planar heating element and a method of manufacturing the same, wherein the carbon solution is coated with the conductive part to increase durability as well as improve durability by the bonding force of the carbon fiber yarn and the verb.

Description

Carbon liquid coating device for planar heating element {DEVICE FOR COATING CARBON LIQUID ON PALNE HEATER}

1 is a perspective view of a planar heating element according to the present invention,

2 is an enlarged view of a portion A of the planar heating element according to the present invention shown in FIG. 1;

3 and 4 is an enlarged view of a portion B of the planar heating element according to the present invention shown in FIG.

5 is a schematic view showing a carbon liquid applying apparatus for applying the carbon liquid to the conductive portion of the planar heating element according to the present invention;

6 is a flowchart illustrating a manufacturing process of the planar heating element according to the present invention;

7, 8 and 9 are perspective views of a conventional planar heating element.

* Explanation of symbols for main parts of drawings *

1: Planar heating element 2: Heating element

3: conductive part 4: carbon liquid

6: carbon liquid coating device 21: carbon fiber yarn

22: general fiber yarn 23: kink

31: carbon fiber yarn 32: verb

33: intersection 61: hopper

62: frame 63: coating roller

64: feed roller 65: power transmission gear

The present invention relates to a planar heating element, and more specifically, a general fiber yarn and a carbon fiber yarn are woven in a net form to form a heat generating portion, and the carbon fiber yarn and a verb are partially woven into the heat generating portion as a conductive portion for conducting heat. The present invention relates to a planar heating element and a method of manufacturing the same, which are excellent in bonding strength between the carbon fiber yarn and the company by applying a carbon solution to the conductive part, and thereby improve conductivity.

In general, the planar heating element is a thin sheet-to-board heating element that generates radiant heat by electric conduction. Since it is easy to control temperature and does not pollute the air, it is hygienic and noiseless, the thermal mat, the thermal pad, the bed mattress, the thermal blanket It is also widely used in blankets, residential heating devices such as apartments and general houses.

In addition, it is possible to prevent snow melting and freezing of roads and parking lots, such as heating devices in commercial buildings such as offices and shops, industrial heating devices such as workshops and barracks, various industrial heating devices, agricultural facilities such as vinyl houses and agricultural product drying systems. In addition to the various anti-freezing devices, it is also used for leisure, winter, home appliances, anti-fog of mirrors and glass, health supplement, animal husbandry.

As the heat generating source of the planar heating element, a heating wire etched a metal thin plate such as a nickel chromium heating wire, a copper nickel alloy heating wire, aluminum, or the like is used, and a carbon black thick film is used. The heating wires are made of electricity that flows through one wire, so if any part of the heating wires is cut off, electricity does not pass through the entire heating wire, which causes a problem of losing its function as a heating element. There was a problem formed.

In addition, when the heating wire is short-circuited in the planar heating element, since the electrical resistance is greatly reduced at that portion, which causes severe heat generation, there is a risk of fire.To prevent short circuit of the heating element, the surface of the heating line is completely insulated with an electrical conductor having a sufficient thickness. However, since the electrical insulator is a thermal insulator, the heat conduction characteristics are poor, so that the heat generation efficiency of the planar heating element is greatly reduced.

 In order to solve the problem in the conventional planar heating element using the metal heating wire, a planar heating element using carbon fiber yarn as a heating wire has been proposed instead of a metal heating wire such as nichrome.

Since the carbon fiber yarn has an excellent far-infrared emissivity, the planar heating element using the carbon fiber yarn heating fabric can be heated by radiation to improve energy efficiency, and additionally, various useful effects of far infrared ray can be used. have.

The planar heating element using the conventional carbon fiber yarn is carbon fiber yarn in the groove of the synthetic resin sheet formed with a woven fabric or grooves formed by densely arranging warp and weft yarn as shown in FIG. The sheet form was mostly.

However, since the surface heating element in the form of woven paper is woven in the form of no space between the warp and weft carbon fiber yarns, the raw material cost of carbon fiber yarns per unit area is high, and the amount of carbon fiber yarns per unit area is not changeable, resulting in various heat generation. The product having the characteristics was difficult to manufacture, and there was a problem that it is difficult to achieve electrical stability due to the spark generated by the friction between the warp and the weft of the carbon fiber yarn during the electrical conduction.

In order to solve the problem of the woven planar heating element using the conventional carbon fiber yarn, it is preferable to make the planar heating element of the net shape by lowering the density of warp and weft yarn. It is difficult to maintain stability and cannot be used. In particular, carbon fiber yarns not only take the form of smooth multifilament yarns without twisting, but are also very rigid than ordinary fiber yarns, so that weaving them into a net form with low density is very difficult to handle and almost impossible to handle after weaving. do.

As disclosed in Korean Patent Laid-Open Publication No. 2001-7583, which is a conventional technology that solves the above-mentioned problems, the "carbon fiber yarn heating fabric and a far-infrared radiation planar heating element using the same" are inclined to the carbon fiber yarn as shown in FIG. Weaving them at a predetermined interval using the weft yarn and bonding the parts where they cross with resin or the like is firmly bonded, but in order to bond the cross points as described above, we need to join the cross points after weaving the carbon fiber yarn in the form of a mesh. After weaving, it was difficult to handle while maintaining the shape until joining the intersection point, and also because the carbon fiber yarn is used as warp and weft yarn, there was a problem of damage due to friction during the weaving process.

"Low Density Planar Heating Element Using Carbon Fiber Yarn" published in Korean Registered Utility Model Publication No. 20-350509, which is a conventional technology that solves the above-described problems, as shown in FIG. Twist the wire and use the carbon fiber yarn 110 as a weft yarn, and the reticulated heat generating portion (H) of the form in which the carbon fiber yarn 110 passes between the twists, and both sides of the heat generating portion (H) are conductive. The yarn was made of a conductive portion (E) intersecting with the carbon fiber yarn 110, to produce a low-density planar heating element (100).

However, the conductive portion E of the conventional low-density planar heating element is formed by crossing the carbon fiber yarn 110 used as the weft yarn and the conductive yarn used as the warp at a predetermined interval so that the carbon fiber yarn 110 and the conductive yarn are in point contact. There is a problem that the thermal conductivity is weak because it is in a state, and also the contact force is reduced by the coupling by the point contact, which causes the carbon fiber yarn 110 and the conductive yarn is separated and short-circuited, thereby reducing the overall durability.

In addition, the conductive yarn of the planar heating element 100 forms a conductive portion (E) with the carbon fiber yarn 110 by using a verb 130. The verb 130 is made of a metal wire such as copper. 130) was oxidized.

The present invention was devised to solve the conventional problems as described above, and an object of the present invention is to weave the carbon fiber yarn and the verb forming the conductive portion and then to apply the carbon liquid to the conductive portion to strengthen the bonding force and contact force, as well as The present invention provides a planar heating element capable of improving the thermal conductivity of an electrically conductive portion and preventing oxidation by applying a carbon liquid, and a method of manufacturing the same.

The present invention for achieving the above object is a common fiber yarn is arranged in an inclined and carbon fiber yarns are arranged in a weft, the heat generating portion woven in a lattice form, the conductive portion is formed in some or several parts of the heat generating portion to conduct heat to the heat generating portion The conductive part is made of a planar heating element, characterized in that the conductive part is interwoven with the carbon fiber yarn and the verb, the carbon liquid is coated on the conductive part.

In addition, the common fiber yarn of the heat generating portion is a pair of two strands are twisted to form a twist, the object of the present invention by the planar heating element, characterized in that weave in the form of the carbon fiber yarn passed through the twist of the general fiber yarn. Is achieved.

In addition, the object of the present invention is achieved by the planar heating element, characterized in that the coating liquid is coated on the heating portion.

In addition, the frame constituting the appearance of the coating device; A power transmission gear supported by the frame and transmitting power to the applicator; A pair of application rollers rotating by the power transmission gear; A hopper fixed to one side of the application roller to supply carbon liquid to the application roller; The object of the present invention is achieved by a planar heating element characterized in that the carbon solution is applied to the conductive portion by a carbon solution coating device comprising a feed roller for transferring the planar heating element between the application rollers.

Still another object of the present invention is a method of manufacturing a planar heating element, comprising: arranging general fiber yarns at an inclination and arranging carbon fiber yarns at a weft to form heat generating parts; Forming conductive parts by weaving carbon fiber yarns and verbs by using a verb as an incline instead of the general fiber yarn on a part or several parts of the heat generating part; Applying a carbon solution to the conductive portion; Applying a coating solution to the heating part; It is achieved by a planar heating element manufacturing method comprising the step of drying the planar heating element.

In addition, the carbon solution is achieved by the method of producing a planar heating element, characterized in that consisting of a conductive urethane resin, conductive polyamide resin, conductive carbon, graphite, dispersant, plasticizer, ethyl acetate, isobutyl alcohol, ethanol do.

In addition, the object of the present invention is achieved by the method of manufacturing a planar heating element, characterized in that the drying of the planar heating element is dried in a drying furnace at 120 ℃.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the planar heating element and a method for manufacturing the same according to the present invention that can be specifically carried out the above object is as follows.

1 is a perspective view of a planar heating element according to the present invention, wherein the planar heating element 1 is woven by a carbon fiber yarn 21 and a general fiber yarn 22 to generate heat and generate heat; In order to supply heat to the section 2, the carbon fiber yarn 31 and the verb 32 include a band-shaped conductive portion 3 woven.

The heat generating unit 2 is arranged in a perpendicular to the normal fiber yarn 22 and the general fiber yarn 22, the twisted yarn (twist yarn, twisted) formed by twisting two filament yarns are used as a pair It is made of a carbon fiber yarn 21 used as a weft yarn. Accordingly, the general fiber yarn 22 and the carbon fiber yarn 21 are formed in a lattice form, and in particular, the carbon fiber yarn 21 is passed between the twisted portions 23 of the general fiber yarn 22. Weave.

FIG. 2 is an enlarged perspective view of a portion A of the heat generating unit 2 shown in FIG. 1, in which two strands are formed in a pair and twisted to form a plurality of common fiber yarns 22 arranged vertically. Since the carbon fiber yarn 21 is woven through the twisted portions 23 arranged in the horizontal side of the plurality of general fiber yarns 22 arranged so as to be perpendicular to the 22, the upper and lower portions of the carbon fiber yarns are Since it is fixed by the (22), the heat generating section 2 can maintain the stability of the form as long as excessive physical force is not applied. In addition, the density and the calorific value of the heat generating unit 2 may be adjusted according to the spacing and twisting frequency of the general fiber yarn 22 and the arrangement of the carbon fiber yarn 21.

Here, the general fiber yarn 22 refers to a general garment or industrial fiber having little conductivity or heat generation as is known. For example, natural fibers such as cotton or hemp, synthetic fibers such as nylon or polyester, polypropylene, regenerated fibers such as rayon or acetate, semisynthetic fibers, and the like are applicable, and are not particularly limited to one fiber.

In addition, the carbon fiber yarn 21, as known, generates heat during energization, and various methods of manufacturing carbon fiber yarn are known. For example, a method of preparing carbon powder containing various inorganic minerals by applying it to general multifilament fiber yarn, and drawing carbon, turnsten, manganese, stainless steel, etc. in a high temperature molten state into yarn, PAN (polyacrylic) A variety of methods are known, such as a method of carbonizing nitrile-based fibers, and these methods are different from their production methods, but all of them are applicable. These carbons are lighter than metals (aluminum), but have superior strength and strength compared to metals (iron).

The conductive part 3 is partially or entirely formed in a predetermined portion of the heat generating part 2, and is connected to a power supply part (not shown) to conduct heat to the heat generating part 2, and is formed in a grid shape. Instead of the general fiber yarn 22 formed at the predetermined position of the heat generating section 2, a plurality of strands of verbs 32, each of which is made of copper as a warp, are disposed and woven while crossing the carbon fiber yarn 31. do.

3 is an enlarged perspective view of a portion B of the conductive part illustrated in FIG. 1, and FIG. 4 is a view illustrating a state in which a carbon liquid is applied to the conductive part, and extends from the carbon fiber yarn 21 to be arranged in a horizontal direction. The plurality of verbs 32 are woven into a flat structure (Plain stisch) to cross each of the plurality of carbon fiber yarns 31, wherein the plurality of verbs 32 are densely formed to be adjacent to each other.

Preferably, when the carbon fiber yarn 31 and the verb 32 are woven to form the conductive portion 3, the carbon liquid 4 is applied to the entire conductive portion 3. Then, the carbon liquid 4 is applied to the intersection point 33 of the carbon fiber yarn 31 and the verb 32 which is firmly bonded and is in point contact with the carbon fiber yarn 31 and the verb 32. Thermal and far-infrared characteristics of the conductive portion 3 are improved, and oxidation of the verb 32 can be prevented.

5 is a schematic view showing a carbon liquid applying apparatus for applying a carbon liquid to the conductive portion of the present invention, wherein the frame 62 forming the outer appearance of the carbon liquid applying apparatus 6 and the inside of the frame 62 are shown. Power transmission gears 65 installed at both sides to drive the applicator 6 and adjacent to each other to apply carbon liquid 4 to the planar heating element 1 by receiving power from the power transmission gears 65. A feed roller 64 for transferring the planar heating element 1 to a pair of application rollers 63 installed thereon, a hopper 61 for supplying the carbon liquid 4 to the application rollers 63, and the application roller 63. And the carbon solution 4 is applied to the planar heating element 1 and the conductive portion 3.

Accordingly, the planar heating element 1 conveyed by the conveying roller 64 passes through the coating roller 63 in which the carbon liquid 4 is buried, thereby burning the conductive part 3 of the planar heating element 1. The small liquid 4 is applied. At this time, the conductive part 3 is pressed by the coating roller 63, the carbon liquid 4 is applied, and the bonding force between the carbon fiber yarn 31 and the verb 32 is further improved.

When the carbon liquid 4 is applied to the conductive portion 3 of the planar heating element 1, it is also possible to perform band treatment on the conductive portion 3 after drying at a predetermined temperature.

At this time, the carbon liquid (4) is a conductive urethane resin 35%, conductive polyamide resin 10%, conductive carbon 8%, graphite 12%, dispersant 0.5%, plasticizer 0.5%, ethyl acetate 10%, isobutyl alcohol 10%, Ethanol has a proportion of 14%.

6 is a flowchart illustrating a method of manufacturing the planar heating element 1 according to the present invention. First, the heat generating part 2 is woven using a general fiber yarn 22 and a carbon fiber yarn 21 as a warp yarn and a weft yarn. The conductive part 3 is formed by the verb 32 and the carbon fiber yarn 31 by using the verb 32 as a slope in place of the general fiber yarn 22 in a part or several parts of the heat generating part 2. Weaving and supplying the planar heating element 1 having the heat generating portion 2 and the conductive portion 3 to the carbon liquid applying device 6 apply the carbon liquid 4 to the conductive portion 3. When the coating of the carbon liquid (4) is completed, the coating liquid is dried for a predetermined time and the coating liquid is applied to the entire surface heating element (1). As the coating liquid, silicone liquid or latex having an insulating property is used. Thereafter, the planar heating element 1 is transferred to a drying furnace and dried at a temperature of 100 to 150 ° C. to complete the production of the planar heating element 1.

As described above, the planar heating element according to the present invention is a heat generating portion woven from the general fiber yarn and carbon fiber yarn, and formed in some or several parts of the heat generating portion, and woven with carbon fiber yarn and verbs as a conductive part for conducting heat to the heat generating portion. And the carbon solution is applied to the conductive part, and the bonding force of the conductive part is strengthened to maintain the stability of the form unless excessive physical force is applied, and the thermal conductivity and the far-infrared ray characteristics of the conductive part are improved by the carbon liquid. A planar heating element was provided.

In addition, the common fiber yarn of the heat generating portion is a pair of two strands are twisted to form a twisted portion, weaved in the form of the carbon fiber yarn passed through the twisted portion of the general fiber yarn, the interval and number of twists of the general fiber yarn and the carbon According to the arrangement of the fiber yarn, it is also possible to adjust the density and the calorific value of the heat generating portion to provide a planar heating element that can be used for various purposes.

In addition, the conductive liquid is a carbon liquid is coated by a carbon liquid applying apparatus, and the carbon liquid is applied to the conductive portion of the planar heating element by passing between the coating rollers in which the carbon liquid is buried, and the conductive portion is applied by the coating roller. As the carbon solution is pressed, the bonding force or adhesion between the carbon fiber yarn and the verb is further improved.

Claims (8)

delete delete delete A frame constituting the appearance; A power transmission gear supported by the frame to transmit power; A pair of application rollers rotating by the power transmission gear; A hopper fixed to one side of the application roller to supply carbon liquid to the application roller; Apparatus for applying a carbon liquid to the planar heating element comprising a feed roller for transferring the planar heating element between the coating rollers. delete delete delete delete

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