KR100724605B1 - Non-magnetic field heating wire in bedding - Google Patents

Abstract

The present invention relates to a heating wire used for bedding, such as electric blankets or electric yoke, and more particularly, to reduce the thickness of the inner insulating layer to reduce the consumption of raw materials and to close the heating wire between the inner and outer lead wires, The present invention relates to a non-magnetic heating wire for bedding, which coats a conductive resin on the outside to shield electric charges charged on the heating wire surface. The present invention provides a heat transfer layer having one side connected to either terminal of a power supply; an internal insulation layer covering and covering the heat transfer layer for insulation; A shield layer connected to the heat transfer layer and wound around an outer circumference of the inner insulation layer; A conductive coating layer coated on an outer circumferential surface of the shield layer to surround the shield layer; And an outer insulating layer surrounding and insulating the outer side of the conductive coating layer, wherein the current flowing in the heat transfer layer and the shield layer flows in a reverse direction. It is a conductive synthetic resin material to block the, it characterized in that the inner insulation layer and the shield layer completely wrapped so as not to be exposed to the outside.

The present invention further includes a conductive coating layer made of a conductive synthetic resin material, and has an effect of thoroughly preventing a charge from being charged by forming a leakage electric field outside the heating wire. In addition, by effectively externally discharging the electric charge charged in the heating wire, it has an effect of preventing the effect on the user. In addition, by shielding through the synthetic resin conductive coating, the production cost is reduced, the productivity is improved. In addition, it is possible to shield the electric field leaking to the outside, has the effect of removing the factors that adversely affect the human body.

Description

Magnetic field heating wire for bedding {NON-MAGNETIC FIELD HEATING WIRE IN BEDDING}

1 is a view showing a conventional heating line configuration and its cross section.

FIG. 2 is a diagram showing a heating wire cross section of the heating wire configuration of FIG. 1. FIG.

3 is a diagram showing the offset and residual magnetic flux densities occurring around two electrothermal conductors in opposite directions and separated from each other.

Fig. 4 is a diagram showing the offset magnetic flux density generated around two electrothermal conductors in which the current directions are opposite and the distances are close together.

5 is a conceptual diagram illustrating a principle of leakage of an electric field from a heating wire and a principle of shielding the electric field from a heating wire provided with a conductive coating layer.

Fig. 6 is a diagram showing a heating line configuration according to the first embodiment of the present invention.

FIG. 7 is a diagram illustrating a cross section of the heating line configuration of FIG. 6. FIG.

8 is a diagram showing a heating line configuration according to a second embodiment of the present invention.

9 is a view showing a connection structure of the heating wire of the present invention.

Fig. 10 is a diagram showing a heating line configuration of a third embodiment of the present invention.

FIG. 11 is a diagram illustrating a cross section of the heating line configuration of FIG. 10. FIG.

12 is a diagram showing a heating line configuration according to a fourth embodiment of the present invention.

Fig. 13 is a diagram showing a heating line configuration and its cross section in the fifth and sixth embodiments of the present invention.

<Description of Symbols for Main Parts of Drawings>

1: electric wire, electric wire 2: internal insulation layer

3: lead wire 4: conductive coating layer

5: outer insulation layer 6: ventricle

The present invention relates to a heating wire used for bedding, such as electric blankets or electric yoke, and more particularly, to reduce the thickness of the inner insulating layer to reduce the consumption of raw materials and to close the heating wire between the inner and outer lead wires, The present invention relates to a non-magnetic heating wire for bedding, which coats a conductive resin on the outside to shield electric charges charged on the heating wire surface.

Conventional non-magnetic heating wire has a disadvantage that the thickness is very thick due to the thickness of the inner insulator and weak in flexibility. That is, in the conventional bedding-type non-magnetic heating wire, the internal insulation softens due to the high heat of the heating wire (or the heater coil and the heating conductor) during heating, so the insulation is sharply dropped, so the thickness of the internal insulation has to be thickened to prevent short circuit of the heating wire and the lead wire. Therefore, when the thickness is very thick (at least 6 mm or more), when applied to an electric mat, it is blown over the epidermis, and there is a problem of exhausting to the user's body. Was almost impossible.

In order to solve this problem, a heating wire having an enamel film coated thereon to reduce the thickness of an internal insulator has been devised by the present applicant. The configuration of the non-magnetic heating wire will be described with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the conventional heating line structure and its cross section, and FIG. 2 is a figure which shows the heating wire cross section of the heating line structure of FIG. 1 and 2, a ventricle 11 made of polyester thread or glass wool, a heating wire 12 surrounding it, an inner insulator 13 covering the outside of the ventricle 11 and the heating wire 12, It consists of a pair of lead wires 14a and 14b which cross each other on the outside of the inner insulator 13 and wrap the inner insulator 13 and the outer insulator 15 surrounding the lead wires 14a and 14b.

The other end of the heating wire 12 and the other end of the lead wires 14a and 14b are short-circuited, one end of the heating wire 12 is connected to one terminal of a power supply (not shown), and one end of the lead wires 14a and 14b is the other end of the power supply. It is connected to the terminal and grounded. The electric current flowing to the heating wire 12 comes out from the end by the U-turn again through the lead wires 14a and 14b. At this time, the current direction in the heating wire 12 and the current direction in the lead wires 14a and 14b are opposite to each other. The induced magnetic field is canceled out to form a magnetic field.

In particular, the outer periphery of the heating wire 12 and the like to be coated with an enamel layer (12a) to serve as an insulation, thereby making the thickness of the inner insulator 13 even thinner. Therefore, the overall thickness of the heating wire becomes thinner, and the distance between the heating wire 12 and the lead wires 14a and 14b is narrowed, thereby bringing close contact with each other. An effect obtained by bringing the heating wire 12 and the lead wires 14a and 14b into close contact will be described with reference to FIGS. 3 and 4.

FIG. 3 is a diagram showing the offset and residual magnetic flux density generated around two electrothermal conductors with opposite current directions and separated from each other, and FIG. 4 is an offset occurring around two electrothermal conductors with opposite current directions and close contact with each other. It is a figure which shows magnetic flux density. 3 and 4, in the currents flowing in the opposite directions, when the distance between the currents flows apart, some of the magnetic fields do not cancel out and remain.

At this time, if the distance between the two wires is in close contact, most of the magnetic fields cancel each other, and the residual magnetic field disappears. Therefore, it is a criterion for the conductors flowing in the opposite directions to be closely positioned to each other to be a good magnetic field-free heating wire. To this end, the thickness of the internal insulator should be minimized. In the case of using an enamel-coated hot wire or an electrically conductive wire, the thickness of the internal insulator becomes thin, thereby improving the magnetic field-free performance.

The conventional heating wire has a metal lead wire arranged and arranged outside to serve to shield the electric field to the outside. However, there is a problem in that the part where the lead wire is not located is partially charged and an electric field is formed to affect the human body.

5 is a conceptual diagram illustrating a principle of leakage of an electric field from a heating wire and a principle of shielding the electric field from a heating wire provided with a conductive coating layer. Referring to a cross section of a conventional heating wire as shown in FIG. 5A, lead wires 14a and 14b are arranged at regular intervals, but an empty space is generated between them.

A leakage electric field is generated in such an empty space, and a charge is charged on the surface of the inner insulator 12, and a charge is also charged in the outer insulator 15. Such charges may cause discomfort or contact with the human body, and may need to be blocked.

To prevent this, a plurality of lead wires may be wound around the inner insulator, a copper foil lead wire, or a braided shield body may be used for a more complete shielding. It is not easy to cover completely.

The present invention has been made to solve the above problems, an object of the present invention is to provide a heating wire that can completely shield the electric field by coating a conductive material to block the electric field inside the outer insulating layer.

In addition, an object of the present invention is to provide a heating wire configured in various forms according to the purpose of the shield layer provided in the heating wire for the shielding action.

In order to achieve the above object, the present invention, the heat transfer layer is connected to one side of any one terminal of the power source; An inner insulation layer covering and covering the heat transfer layer for insulation; A shield layer connected to the heat transfer layer and wound around an outer circumference of the inner insulation layer; A conductive coating layer coated on an outer circumferential surface of the shield layer to surround the shield layer; And an outer insulating layer surrounding and insulating the outer side of the conductive coating layer, wherein the current flowing in the heat transfer layer and the shield layer flows in a reverse direction. It is a conductive synthetic resin material to block the, it characterized in that the inner insulation layer and the shield layer completely wrapped so as not to be exposed to the outside.

The heat transfer layer comprises: a central ventricle; And a heating wire wound spirally on an outer circumferential surface of the ventricle and one end of which is connected to either terminal of the power source, wherein the heating wire is energized through the heating wire.

The heat transfer layer is characterized in that it comprises a heat conducting wire having one end connected to either terminal of the power source.

delete

The shield layer may include a lead wire, and the lead wire may be spirally wound on an outer circumferential surface of the inner insulation layer.

The shield layer may include two or more lead wires, and the lead wires may be wound around an outer circumferential surface of the inner insulation layer.

The shielding layer may include: first and second lead wires, and the first and second lead wires may be wound in a double spiral at intervals on an outer circumferential surface of the inner circumferential insulating layer to cross each other repeatedly.

The shield layer includes: first and second lead wires, the first lead wires spirally wound around an outer circumferential surface of the inner insulation layer, and the second lead wire is longitudinally wired to an outer circumferential surface of the inner insulation layer to form the first lead wire. It is characterized by repeatedly crossing one lead wire.

The shield layer may include: a thin metal plate, wherein the thin metal plate is spirally wound around an outer circumferential surface of the inner insulating layer.

The shield layer may include a metal shield, and the metal shield may surround an outer circumferential surface of the inner insulation layer.

The present invention of the configuration as described above can be implemented in various embodiments, with reference to the various embodiments described in the accompanying drawings to look at the configuration of the present invention in detail.

FIG. 6 is a diagram showing a heating line configuration of the first embodiment of the present invention, and FIG. 7 is a diagram showing a cross section of the heating line configuration of FIG. 6 and 7, a straight heat conducting wire 1 is arranged at the center thereof, and an inner insulator 2 is coated on the outside thereof. The lead wire 3 is wound around the outer circumference of the inner insulator 2, and the outer insulator 5 is covered on the outermost side thereof. Inside the outer insulator 5, the conductive insulator layer 4 is provided to surround the inner insulator 2 and the lead wire 3. The conductive coating layer 4 is made of a conductive synthetic resin material, so that one side is grounded with the earth.

The end of the straight heat conducting wire 1 and the end of the lead wire 3 are connected to each other through a connection point on the other side, so that the current inputted to the center electric conducting wire 1 is output in the opposite direction through the lead wire 3 again at the end. Therefore, the electric current flowing in the electrothermal conductive wire 1 and the lead wire 3 becomes opposite to each other, and the magnetic field generated by the heating wire is canceled out.

As shown in FIG. 5B, the conductive coating layer 16 is coated to surround the lead wires 14a and 14b on the outer circumference of the inner insulator 13 so that electric charges are charged on the outer surface to prevent the electric field from leaking. Has the effect.

In order to keep the electric field potential between the earth and the heating wire surface as low as possible, the electric field should be prevented from leaking. For this purpose, a large number of lead wires are wound around the shield layer, or a braided shield metal or a tape type copper foil metal is used. Has come. Among them, the braided shield metal has a very high electric field shielding efficiency, but the cost of raw materials is high, and the production efficiency of the braided metal itself is inferior. Tape type copper foil, silver foil metal has a high electric field shielding efficiency, but the cost of raw materials is high, flexibility and flexibility is not suitable for bedding.

The present invention can be solved simply by providing a conductive coating even without adding a complicated structure at high cost to the shield layer. The conductive coating is made of a conductive synthetic resin, and when the lead wire of the shield layer is grounded and becomes zero potential, the conductive coating layer 4 also maintains zero potential. Therefore, the positive charges charged on the outer circumferential surface of the inner insulator 2 escape through the conductive coating layer and the shield layer, and the outer circumferential surface of the heating wire has zero potential, so that no leakage electric field exists.

By using the conductive coating layer made of conductive synthetic resin, it is possible to block leakage electric field without using expensive braiding or copper foil metal to increase the blocking efficiency, and to have the unique flexibility of synthetic resin so that it is more suitable for the use of bedding. Has Since the conductive synthetic resin is a flux process by wire extrusion of the resin, the manufacturing speed proceeds several tens to several hundred times faster than the winding process of the metal braided winding, the tape type copper foil, and the silver foil, thereby improving productivity.

8 is a diagram showing a heating line configuration according to a second embodiment of the present invention. Referring to FIG. 8, instead of a conventional lead wire, a tape and a string conducting metal 3 in the form of a shield are spirally wound and used as a structure for the shield. The thin metal 3 has a disadvantage that it is expensive compared to the lead wire, but there is a benefit to use in a product having a short length of the heating wire in terms of more reliable shielding.

9 is a view showing a connection structure of the heating wire of the present invention. Referring to FIG. 9, the linear conductive wire 1 is connected to one end of a power source, and the lead wire 3 for the shield is connected to the other end of the power source and grounded. The current input to the electrothermal conductive wire 1 is drawn out through the lead wire 3 because the end is connected to the lead wire 3. Since the current direction in the electrothermal conductor wire 1 and the current direction in the lead wire 3 are opposite to each other, the magnetic field induced by the current cancels out, and a magnetic field is formed.

In addition, the conductive coating layer 4 of the conductive synthetic resin material allows the charged electric charge to escape through the ground and the lead wire 3 grounded. As a result, the potential difference generated by the electric charges charged on the surface of the heating line is slightly reduced.

FIG. 10 is a diagram showing a heating line configuration of the third embodiment of the present invention, and FIG. 11 is a diagram showing a cross section of the heating line configuration of FIG. 10 and 11, it is characterized in that the heating wire (1) is spirally wound around the ventricle (6) instead of the linear heating conductor. Thus, in the case of the heating wire using the ventricle 6, there exists a characteristic that flexibility is improved and it becomes flexible.

12 is a diagram showing a heating line configuration according to a fourth embodiment of the present invention. Referring to FIG. 12, while using the ventricle 6 as in the heating line of FIG. 10, the thin metal 3 is used as a shielding structure.

Fig. 13 is a view showing a heating line configuration and its cross section in the fifth and sixth embodiments of the present invention. Referring to FIG. 13, the first lead wire 3b of the pair of lead wires is similarly wound in a spiral, and the second lead wire 3a is linearly wired in the longitudinal direction to the outer circumferential surface of the internal insulator 2.

Due to this deformation, the heating wire is relatively weak against bending stress or heat deformation, but has the advantage of reducing the length of the entire lead wires 3a and 3b and having good manufacturing cost and productivity in that winding work is easy. Therefore, it is preferable to adopt the lead wire 3a linearly arranged in the longitudinal direction for the beddings which receive less bending stress by an external force like a thick mat.

The present invention further includes a conductive coating layer made of a conductive synthetic resin material, and has an effect of thoroughly preventing a charge from being charged by forming a leakage electric field outside the heating wire.

In addition, the present invention has an effect of effectively externally discharging the electric charge charged in the heating line, to prevent affecting the user.

In addition, the present invention has the effect that the manufacturing cost is reduced, productivity is improved by shielding through a synthetic resin conductive coating.

In addition, the present invention can shield the electric field leaking to the outside, has the effect of removing the factors that adversely affect the human body.

Claims (10)

A heat transfer layer having one side connected to either terminal of the power source; An inner insulation layer covering and covering the heat transfer layer for insulation; A shield layer connected to the heat transfer layer and wound around an outer circumference of the inner insulation layer; A conductive coating layer coated on an outer circumferential surface of the shield layer to surround the shield layer; And And an outer insulating layer covering and insulating the outer side of the conductive coating layer, wherein the current flowing in the heat transfer layer and the shield layer flows in a reverse direction. The conductive coating layer is a conductive synthetic resin material to block the electric field, the magnetic field heating wire for bedding, characterized in that the inner insulation layer and the shield layer completely wrapped so as not to be exposed to the outside. The method of claim 1, wherein the heat transfer layer is: Central ventricle; And And a heating wire wound spirally on an outer circumferential surface of the ventricle and having one end connected to one terminal of a power source, wherein the heating wire is energized through the heating wire. The method of claim 1, wherein the heat transfer layer is: A magnetic field heating wire for bedding, characterized in that it comprises a heat conducting wire, one end of which is connected to either terminal of the power source. delete The method of claim 2, wherein the shield layer is: Including lead wires, And the lead wire is spirally wound on the outer circumferential surface of the inner insulation layer. The method of claim 2, wherein the shield layer is: 2 or more lead wires, And the lead wire is wound around the outer circumferential surface of the inner insulation layer. The method of claim 2, wherein the shield layer is: Including first and second lead wires, And the first and second lead wires are wound in a double spiral at intervals on the outer circumferential surface of the inner circumferential insulating layer and repeatedly cross each other repeatedly. The method of claim 2, wherein the shield layer is: Including first and second lead wires, The first lead wire is spirally wound around the outer circumferential surface of the inner insulation layer, And the second lead wire is longitudinally wired to an outer circumferential surface of the inner insulation layer so as to repeatedly cross the first lead wire. The method of claim 2, wherein the shield layer is: Includes metal sheet, The metal sheet is a magnetic field heating wire for bedding, characterized in that the spiral wound around the outer peripheral surface of the inner insulating layer. The method of claim 2, wherein the shield layer is: A metal shield, The metal shield body is a magnetic field heating wire for bedding, characterized in that surrounding the outer peripheral surface of the inner insulating layer.

Images