JPH03230491A - Disk-shaped electric heating element - Google Patents

Abstract

PURPOSE:To obtain excellent mechanical strength and perform heating over the whole face by using electric heating wires for all or part of radial threads or peripheral threads, and arranging electrode wires crossing these electric heating wires. CONSTITUTION:The disk-shaped woven fabric 2 of a disk-shaped electric heating element 1 is woven with radial threads 3 arranged radially from the center of a disk and peripheral threads crossing the threads 3 and extended spirally into a disk shape. Electric heating wires 5 are used for part of the radial threads. Electrode wires 6a, 6b are woven in the peripheral direction intersecting with the electric heating wires 5 at the outer periphery and near the center of the woven fabric 2. The electrode wires 6a, 6b intersect with the electric heating wires 5 and are excited. Lead wires 7 are connected to the electrode wires 6a, 6b respectively, and the electric heating wires 5 are heated when voltage is applied via the lead wires 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disc-shaped electric heating element that generates heat by passing electricity, and particularly relates to a disc-shaped fabric used as a reinforcing material for a parabolic antenna made of FRP. It is.

In recent years, with the spread of satellite broadcasting, small parabolic antennas have come into wide use. This type of parabolic antenna is installed outdoors and faces diagonally upward, so snow accumulates in cold regions during the winter, reducing reception efficiency.

Therefore, parabolic antennas are provided with electric heating properties, and when snow is falling, electricity is applied to the parabolic antennas to generate heat and melt the snow. Since this type of parabolic antenna is molded from FRP, it is conceivable to impart electrothermal properties to the reinforcing material.

Conventional technology As a conventional woven fabric with electric heating properties,
The one described in Japanese Patent No. 131092 is known. This is a fabric in which heating wires are woven into the warp or weft, and at least one pair of electrode wires are arranged to intersect with the wires, and a voltage is applied between the electrode wires to energize the heating wires to generate heat. be.

Problems to be Solved by the Invention However, this method does not work unless the shape is at least square. If the electrode wire is cut into a circular shape, both ends of the electrode wire are cut off and shortened, making it impossible to generate heat across the entire surface.

It is also known that rubber or synthetic resin is filled with conductive particles such as carbon to give it electrical heating properties, but it is difficult to use this to mold parabolic antennas made of FRP. 2 It is unsuitable for use.

The present invention was made in view of the above circumstances, and it is an object of the present invention to provide a structure of an electrothermal disk-shaped fabric that generates heat on its entire surface and can serve as a reinforcing material for FRP.

As a means for solving the problems, the present invention provides a disc-shaped fabric made by weaving radial threads arranged radially from the center and circumferential threads extending spirally across the radial threads. , a heating wire is used as all or a part of either the radial thread or the circumferential thread, and an electrode wire is arranged to intersect the heating wire.

The specific structure is a disc-shaped fabric made by weaving radial threads arranged radially from the center and circumferential threads extending spirally across the radial threads. A heating wire is used in at least a part of the fabric, electrode wires are arranged in the circumferential direction to intersect the heating wire near the center and on the outer periphery of the disk-shaped fabric, and lead wires are connected to the electrode wires. It is something to do.

In this disc-shaped electric heating body, at least one electrode wire is arranged between the electrode wires near the center and at the outer periphery,
As heating wires, those woven between the electrode wire on the outer periphery and the electrode wire near the center, and the one woven between the electrode wire on the outer periphery and the middle electrode wire, are They can also be arranged in an array, which allows them to generate heat evenly over the entire surface.

In addition, as another specific structure, in a disc-shaped fabric formed by weaving radial threads arranged radially from the center and circumferential threads extending spirally across the radial threads, the circumferential direction A heating wire is used for at least a part of the yarn, a pair of electrode wires are arranged in the radial direction at positions 1 facing each other with the center of the disc-shaped wA object sandwiched between them, and a lead wire is connected to the electrode wire. It is characterized by:

In this structure, it is preferable that the heating wires are woven coarsely near the center of the disk-shaped fabric and densely woven near the outer periphery.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a disc-shaped electric heating element 1 of the present invention.

In this disc-shaped electric heating body 1, 2 is a disc-shaped fabric,
It is formed into a disk shape by weaving radial yarns 3 arranged radially from the center of the disk and circumferential yarns 4 extending spirally across the radial yarns 3.

Radial threads 3 and circumferential threads 4 constituting the disc-shaped object 2
As the fiber, a non-conductive yarn suitable as a reinforcing fiber for FRP is used, and glass fiber yarn or aramid fiber yarn is suitable.

A heating wire 5 is used in a part of the radial thread.

The heating wire 5 is a fiber that generates heat when energized,
Carbon fiber etc. are used. It is also possible to use a yarn in which a heat generating layer made of a conductive resin layer in which conductive particles such as carbon and metal are dispersed in a synthetic resin binder is formed around a synthetic fiber core yarn.

Moreover, the electric resistance value of this heating wire 5 is 0.1 to 100Ω.
/l is appropriate.

Electrode wires 6 a and 6 b are woven in the circumferential direction on the outer periphery and near the center of the disk-shaped fabric, intersecting the heating wire 5 .

The electrode wires 6 a, 6 b are thin wires or ribbon-shaped foils made of conductive metal such as copper or tin alloy, and may also be made of fibers made of ordinary synthetic resin whose surface is plated with metal.

The electrode wires 6 a and 6 b intersect with the heating wire 5 and are electrically connected. A lead wire 7 is connected to each of the electrode wires 6 a and 6 b.
When a voltage is applied through the electrode wires 6 a and 6 b, the heating wire 5 is energized and the heating wire 5 generates heat.

Note that the electrode wires 6 a and 6 b can also be attached to the surface of the disc-shaped fabric 2 without being woven into the disc-shaped fabric 2 .

FIG. 2 shows another embodiment of the invention. In this embodiment, as in the previous embodiment, electrode wires 6a and 6b are woven around the outer periphery and near the center, respectively, and electrodes are also interwoven in the middle. 6C is woven in the circumferential direction. Then, the electrode wire 6a on the outer periphery and the electrode wire 6 near the center
heating wire 5a arranged between the electrode wire 6 on the outer periphery
heating wire 5b arranged between a and the electrode wire 6c in the middle part
are provided in an appropriate arrangement.

And between the electrode wires 6a and 6c and 'r! fh[! By applying a voltage between the wires 6b and 6c, respectively, the hot wire 5a.

5b is energized to generate heat.

FIG. 3 shows yet another embodiment of the invention.

In this embodiment, heating wires 5 are used as the circumferential threads 4 in the disc-shaped fabric 2, and are woven into the radial threads 3 in a spiral manner.

Then, at opposite positions sandwiching the center of the disk-shaped fabric 2,
A pair of electrode wires 6.6 are woven in the radial direction from the outer periphery to the vicinity of the center, and lead wires 7, 7 are connected to the electrode wires 6.6.

In this embodiment, the circumferential threads 4 are all made of one electric heating I
15, however, the heating wire 5 and one or more circumferential threads 4 made of non-conductive synthetic fibers may be used in combination, and these may be spirally woven in an appropriate arrangement.

Further, according to this structure, the length of the heating wire 5 between the electrode wires 6 and 6 is long at the outer periphery of the disk-shaped fabric 2 and short near the center, so that the density of the heating wire 5 as shown in the drawing is It is preferable to arrange them densely on the outer periphery of the disk-shaped fabric 2 and coarsely near the center.

When a voltage is applied between the electrode wires 6 and 6 through the lead wire 7, the heating wire 5 extending in the circumferential direction is energized and generates heat.

Function In the present invention, in the disc-shaped fabric 2 consisting of the radial threads 3 and the circumferential threads 4, the heating wire 5 is used as all or a part of the radial threads 3 or the circumferential threads 4, and Since the electrode wires 6 are arranged to intersect and the lead wires 7 are connected to the electrode wires 6, by applying a voltage to the electrode wires 6 via the lead wires 7, the heating wires 5 are energized and generate heat. be able to.

Effects of the Invention Therefore, according to the present invention, the disc-shaped electric heating body 1 itself is
Since it is made of I1 material 2, it has excellent mechanical strength and is easy to handle, and the disc-shaped electric heating body 1 can be used as a reinforcing material to form a disc-shaped FRP product such as a parabolic antenna.

Another disk shape! Since the radial threads 3 or the circumferential threads 4 disposed over the entire surface of the IL product 2 generate heat, the range of heat generation is not limited as in the conventional electrothermal fabrics,
It is possible to mutually generate heat over the entire surface.

In addition, in the invention of claim 2, the heating wire 5 is attached to the radial thread 3.
Since the spacing between the heating wires 5 is small near the center and wide at the outer periphery, the outer periphery is less likely to generate heat than the center, but according to the invention of claim 3, the outer periphery The density of the heating wire 5 can be increased, and heat can be generated more evenly.

Also, in the invention of claim 4, since the length of the heating wire 5 extending between the electrode wires 6 is different between the outer periphery and the vicinity of the center, the electric resistance value is different, and the outer periphery generates more heat than the vicinity of the center. However, according to the invention of claim 5, the heating wire 5 near the center
Since the area around the outer periphery is made denser, heat can be generated more evenly.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the invention, and FIG. 2 is a plan view showing another embodiment of the invention. FIG. 3 is a plan view showing still another embodiment of the present invention. 1...Disc-shaped electric heating element 2...Disc-shaped IO object 3...Radial thread 4...
・・Circumferential thread 5・・Heating wire 6・
...Electrode wire 7...Lead wire calculation Z diagram

Claims (1)

[Claims] 1. Radial threads (3) arranged radially from the center;
In a disc-shaped fabric (2) formed by weaving a circumferential thread (4) that intersects the radial thread (3) and extends in a spiral, the radial thread (3) or the circumferential thread (4) A disc-shaped electric heating body characterized in that a heating wire (5) is used as the whole or a part of one of the heating wires (5), and electrode wires (6, 6a, 6b) that intersect with the heating wire (5) are arranged. 2 radial threads (3) arranged radially from the center;
In a disc-shaped fabric (2) formed by weaving a circumferential yarn (4) extending spirally across the radial yarn (3), at least a part of the radial yarn (3) is provided with a heating wire. (5)
around the center and outer periphery of the disk-shaped fabric (2),
Electrode wires (6a, 6b) intersecting the heating wire (5) are arranged in the circumferential direction, and lead wires (
7) In the disc-shaped electric heating body 3 according to claim 2, at least one wire is connected between the electrode wires (6a, 6b) near the center and at the outer periphery. The electrode wire (6c) is arranged as a heating wire (5),
One is woven between the electrode wire (6a) on the outer periphery and the electrode wire (6b) near the center, and the other is woven between the electrode wire (6a) on the outer periphery and the electrode wire (6c) in the middle. radial threads (3) arranged radially from the center;
In a disc-shaped fabric (2) formed by weaving a circumferential yarn (4) extending spirally across the radial yarn (3), at least a portion of the circumferential yarn (4) is woven with an electric current. Heat ray (5)
A pair of electrode wires (6) are arranged in the radial direction at opposite positions sandwiching the center of the disk-shaped fabric (2), and a lead wire (7) is connected to the electrode wire (6). A disc-shaped electric heating element 5 characterized in that: The heating wire (5) is woven roughly in the vicinity of the center of the disc-shaped textile (2) and densely woven in the vicinity of the outer periphery of the disc-shaped textile (2). Disc-shaped heating element described in