KR20180103526A - A film heater and manufactu ring method thereof for preventing winter damage of water pipe - Google Patents

Abstract

The present invention relates to a film heater to prevent a water pipe from freezing and bursting, and a manufacturing method thereof. According to the present invention, a film heater, which coats a silver solution on an insulation material (20) and a copper wire (50) connected to an electric wire while connecting to a carbon heating wire (40) and covers a laminating film (20) thereon, comprises: a bottom laminating film (10); the insulation material (20) stacked on the bottom laminating film (10) by being cut by a predetermined area to block humidity, cold air, and external discharge of a heat source; a silver foil (30) stacked on the insulation material (20) by being cut by a predetermined area to block a frequency of an external water vein pulse, and the like; the copper wire (40) formed by arranging two rows of thin copper plates with a predetermined width at a predetermined interval in parallel on the silver foil (30); two groups of carbon heating wires (50) stacked by being disposed in parallel between the copper wires (40) to be connected; and a waterproof film (60) formed on the carbon heating wire (50). The film heater is formed into a semi-cylindrical shape, not a plate shape, through heat treatment to easily surround a water pipe so as to prevent the water pipe from freezing and bursting. Moreover, the film heater formed in the plate shape is simply modified into the semi-cylindrical shape to be used for preventing the water pipe from freezing and bursting. Moreover, a structure is simplified to reduce costs required for manufacturing a product, thereby providing excellent economic efficiency and an advantage of providing a long service life to be stably used for a long time without malfunction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film heater for preventing freezing of a water pipe and a manufacturing method thereof,

The present invention relates to a film heater and a method of manufacturing the same, and more particularly, to a film heater for preventing freezing of a water pipe by easily forming a film heater in a semi- will be.

The film heater, which is one type of surface heating element, utilizes radiant heat generated by electric power supply and is used for bedding such as heating mat, pad, and bedding because temperature is easy to control and hygienic and no air is polluted, It is widely used for heating of buildings, various industrial heating devices, agricultural drying facilities, anti-icing devices for roads and parking lots, leisure and winter clothes, and household appliances.

The primary heat source is a Fe-Cr-Al system, a Ni-Cr system, a high-melting-point metal (Pt, Mo, W , Ta, etc.), and the non-metallic heating element is made of silicon carbide, molybdenum silicide (MoSi2), lanthanum chromite (LaCrO2), carbon, zirconia (ZrO2) Is a ceramic material and barium carbonate.

In recent years, most of film heaters are direct heat transfer type heating elements using thick film resistors. They are coated with carbon black or carbon fiber with good thermal conductivity and low thermal expansion coefficient, and then electrodes are attached to the polymer insulating film. And an insulating film for protecting the surface is laminated and molded to have flexibility.

Examples of such film heaters are disclosed in U.S. Patent Nos. 4,250,398 (see Patent Literature 1), 4,960,979 (see Patent Literature 2), JP-A 5-144554 (see Patent Literature 3) 0324833 (see Patent Document 4).

However, since such a film heater is accompanied by an adhesive application and a laminating process, it is difficult to complete adhesion over the entire area of the adhesive surface due to various factors such as the application state of the adhesive, the surface condition of the heating element, and the laminating operation conditions, There is a problem that the insulating film of the weak adhesive force is peeled off during use, in addition to the inevitable presence of the intermittent part.

In the case of a carbon black thick film heating element, electrical and physical properties such as electrical conductivity, thermal conductivity, heat resistance, corrosion resistance, abrasion resistance and lubricity are superior to metal heating elements, but there is a problem in uniformity of thickness due to the painting process , Since the thick film paste is made by mixing the carbon black powder and the binder, the electrical resistivity is changed according to the degree of volatilization and combustion, and the binder is hardly volatilized during the long period of use, causing cracks in the heating element, There is a problem that the characteristics are significantly lowered.

Accordingly, there has been developed a conductive polymer heat-generating sheet in which conductive fillers such as carbon black powder, particulate metal powder, indium oxide, and tin oxide are dispersed in a polymer, or a combination thereof is developed. However, a heat generating sheet in which carbon black powder is dispersed In order to exhibit excellent heat-generating properties, continuous contact between carbon black powders in a heating sheet must be ensured and high electrical conductivity must be ensured. Therefore, a large amount of carbon black must be dispersed, and a range capable of changing the content of carbon black powder There is a problem in that it is restricted to variously changing the heating characteristics.

In addition, when the metal powder is dispersed, the electric resistance of the heating sheet may be increased to almost no heat due to the formation of the oxide layer, which is an electric nonconductor, on the surface of the metal powder. Since the metallic oxide is expensive and has high electrical resistivity, There is a drawback that the characteristic drops.

In addition, the conventional film heater has insufficient shape safety and adhesion, and thus can not be suitably applied to a bending region or fluidity.

A conventionally developed method for solving the above problems is disclosed in Japanese Laid-Open Patent Publication No. 2012-0021525, "Method for manufacturing a film heater "

As shown in Figs. 1 and 2, the "method for manufacturing a film heater " of the above-mentioned Japanese Patent Application Laid-Open No. 2002-0021525 includes a first insulating film 10; A heating line (40) wound on the outer surface of the first insulating film (10) along the longitudinal direction to emit heat by power supply; Second and third insulating films (20, 30) covering the first insulating film (10) and the heating wire (40) An electric wire 50 connected to both ends of the heating wire 40 through one side of the second and third insulating films 20 and 30; And an insulating tape (60) wrapped around and fixing the outer surfaces of the second and third insulating films (20, 30). By applying a metal heating element, uniform heat distribution and excellent heat generation efficiency It is possible to variously change the heat generation characteristics, and it is excellent in shape stability and flexibility according to use, and is firmly adhered to various forms such as a state in which a deformed state by stress is maintained naturally and stably, Since the insulating film and the entire heating line are completely bound by the taping process, it is possible to prevent the phenomenon that the heating line and the insulating film are lifted or peeling off the insulating film during use.

However, since the film heater manufactured by such a method of producing a film heater has a planar shape, it is very inconvenient to use such as covering a water pipe, and in addition, when the water pipe is wound around to prevent frost, the heating wire and the insulating film are disconnected There was a problem causing a failure.

Patent Document 1: U.S. Patent No. 4,250,398, Patent Document 2: U.S. Patent No. 4,960,979, Patent Document 3: JP-A-5-144554, Patent Document 4: Registered Utility Model No. 0324833 Registered Utility Model Publication, Patent Document 5: JP-A No. 2012-0021525

The present invention has been made to solve the various drawbacks and problems caused by the conventional film heater in consideration of the above-mentioned problems. The object of the present invention is to form a film heater in a semi-cylindrical shape instead of a flat surface to easily wrap the water pipe, And a method of manufacturing the same.

Another object of the present invention is to provide a film heater for preventing freezing of a water pipe and a method for manufacturing the film heater, which can be used for preventing freezing of a water pipe by deforming a shape of a film heater formed in a plane in a simple manner.

Another object of the present invention is to provide a film heater for preventing the freezing of the water pipe which can be used for a long period of time without breakdown and which is economical in cost because the structure is simple and the manufacturing cost is reduced, And a manufacturing method thereof.

In order to achieve the above object, the film heater 100 for preventing the freezing of the water pipe according to the present invention is formed by applying a copper wire 50, which is connected to a carbon hot wire 40 disposed with a heat insulating material 20, And a heat insulating material (20) laminated and formed on the bottom laminating film (10) so as to cut off a predetermined area to prevent moisture, cool air, (30) formed on the heat insulating material (20) by cutting off a predetermined area to cut off frequencies such as external snakes and the like, and a plurality of silver bars (30) A carbon hot wire 40 laminated and formed; A copper wire 50 formed by arranging two sheets of thin copper plates formed at regular intervals in parallel on the carbon hot wire 40 with a predetermined width and a waterproof film (not shown) on the carbon hot wire 40 and the copper wire 50 60 are formed on the surface of the substrate by heat treatment.

In the present invention, the film heater is formed into a semi-cylindrical shape rather than a flat surface to easily wrap the water pipe to prevent the water pipe from being frozen, and the film heater formed in a flat shape can also be used for anti- And has a remarkable advantage in that it has a long lifetime that can be used for a long period of time without breakdown as well as being economical because it has a simple structure and a reduced cost for manufacturing a product.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing a partially cut-away state of a conventional film heater,
FIG. 2 is an enlarged cross-sectional view of a conventional film heater,
3 is a perspective view of a film heater for preventing frostbreaking according to the present invention,
Fig. 4 is an exploded perspective view of a film heater for preventing frost damage according to the present invention,
5A and 5B are views showing a manufacturing process of a film heater for preventing water hamper according to the present invention,
6 is a flowchart showing a manufacturing process of a film heater for preventing water hamper according to the present invention,
7 is a use state view of a film heater for preventing water hamper of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a film heater for preventing frost damage and a method of manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 3 is a perspective view of a film heater for preventing frost damage according to the present invention, Fig. 4 is an exploded perspective view of a film heater for preventing frost damage, Figs. 5a and 5b are views showing a manufacturing process of a film heater for preventing frost damage, FIG. 7 is a view showing a state in which the film heater for preventing water hampering according to the present invention is used. FIG. 7 is a view showing a film heater for preventing water hampering according to the present invention, The film heater is coated with a copper wire 50 connected to a wire 40 and connected to a wire 40 and covered with a laminating film 10. The film heater includes a bottom laminating film 10, A heat insulating material 20 laminated on the heat insulating material 20 so as to cut off moisture, cool air and external heat of the heat source, And foil material 30 which is only stacked formation, the carbon heating coil 40, which is connected to a plurality arranged to be parallel to the second group on the foil material 30 is laminated and formed; A copper wire 50 formed by arranging two sheets of thin copper plates formed at regular intervals in parallel on the carbon hot wire 40 with a predetermined width and a waterproof film (not shown) on the carbon hot wire 40 and the copper wire 50 60 are formed on the surface of the substrate by heat treatment.

The method for manufacturing a film heater for preventing freezing of a water pipe according to the present invention includes a first step (S1 step) of adhering an adhesive to a heat insulating material (20) on a bottom laminating film (10); A second step (S2) of laminating the silver foil material (30) on the heat insulating material (20); A third step (S3) of forming a carbon heat ray (40) on the silver foil material (30); A fourth step S4 of forming a copper line 50 by arranging thin copper plates of a predetermined width formed in parallel at regular intervals on the carbon hot wire 40 in two rows, (S5) of forming a waterproof film (60) on the substrate (50); And a sixth step (step S5) of semi-cylindrically molding the planar film heater 100 'through the first to fifth steps using a molding machine (MD).

The bottom laminating film 10 is formed to have a predetermined size, and the heat insulating material 20 is adhered and laminated thereon so as to block moisture, cool air, and external heat of the heat source.

Then, the silver foil material 30 is laminated on the heat insulating material 20 so as to block harmful frequencies such as external watercourse waves and electromagnetic waves.

Thus, the silver foil material 30 is designed to be waterproof and moisture-proof between the laminating film 10 and the heat insulating material.

A copper wire 50 is formed by arranging copper plates of a thin plate formed in two rows in a predetermined width on the carbon hot wire 40 at regular intervals in a manner facilitating attachment of the carbon hot wire 40 on the silver foil material 30 .

The copper wire 50 is formed to have a wide width to facilitate attachment of the carbon hot wire 40.

In addition, since the wire is connected to the copper wire 50 so as to be supplied with electric power and the electric wire is connected to the electric power source, the work flow is reduced.

A waterproof film 60 is laminated on the carbon hot wire 40 and the copper wire 50 to block external moisture.

Example

A film heater for preventing the water pipe from being frozen was manufactured by the method of the present invention.

First, in the first step (S1 step), the heat insulating material 20 is formed on the bottom laminating film 10 by bonding with an adhesive.

Subsequently, the silver foil material 30 is laminated on the heat insulating material 20 in the second step (S2), and then the carbon hot wire 40 is laminated on the silver foil material 30 in the third step (S3) .

Subsequently, in the fourth step (S4), thin copper plates formed in a predetermined width in parallel at regular intervals on the carbon hot wire 40 were arranged in two rows to form a copper wire 50.

Next, a waterproof film 60 is formed on the carbon hot wire 50 and the copper wire 50 in the fifth step S5. Finally, in the sixth step S6, The film heater 100 'having passed through the mold was semi-cylindrical formed by a molding machine MD (see Figs. 5A and 5B).

5A and 5B, in the molding machine MD, the film heater 100 'on the plane is moved by the rollers R1 and R2 provided on the bottom surface so that the film heater 100' And is bent in a cylindrical shape while passing through the ball B in a state of being heated by a heat in the outlet-side tube P of the film heater C. In this state, the film heater, which is cooled by the separate cooling means (100) was fixed to complete the production of the semi-cylindrical film heater (100).

Next, as shown in Fig. 6, a semi-cylindrical film heater 100 is used in the water pipe to prevent the water pipe from being frozen.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited thereto and that various changes and modifications may be made therein without departing from the scope of the invention.

10: Bottom lamination film 20: Insulation
30: silver foil material 40: copper wire
50: carbon hot wire 60: waterproof film
100, 100 ': Film heater
MD: Molding machine

Claims (3)

A film heater covered with a laminating film (10) after coating a copper wire (50) connected to a cable with a heat insulating material (20) and connected to a carbon hot wire (40) A heat insulating material 20 laminated on the bottom laminating film 10 so as to cut off moisture, cool air, and a heat source to a predetermined area so as to cut off external discharge; A copper wire (40) formed by arranging a thin copper plate formed in a predetermined width in parallel in parallel on the silver foil (30) in two rows on the silver foil material (30) A carbon hot wire 50 in which a plurality of copper wires 40 are arranged in parallel in a group and are connected to each other and laminated; Wherein a surface heater on which the waterproof film (60) is formed on the carbon hot wire (50) is semicircular in a heat treatment furnace and a method for manufacturing the same. A first step (S1) of adhering the heat insulating material (20) to the bottom laminating film (10) with an adhesive; A second step (S2) of laminating the silver foil material (30) on the heat insulating material (20); A third step (S3) of forming a carbon heat ray (40) on the silver foil material (30); A fourth step S4 of forming a copper line 50 by arranging thin copper plates of a predetermined width formed in parallel at regular intervals on the carbon hot wire 40 in two rows, (S5) of forming a waterproof film (60) on the substrate (50); And a sixth step (S6) of semi-circularly forming the planar film heater (100 ') through the first to fifth steps in a molding machine (MD). The molding machine according to claim 2, wherein the film heater (100 ') moves in a planar manner by the rollers (R1, R2) provided on the bottom surface of the molding machine (MD) The film heater 100, which is bent in a cylindrical shape by being cooled by the cooling means in this state, passes through the ball B while being heated by the heat in the outlet side tube P of the MD, To thereby prevent the water pipe from being frozen.

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