JPH09306247A - Ammonium resistant insulated wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ammonium resistant insulated wire that has sufficient ammonium resistance, has a variable structure, and has a wide range of applications. SOLUTION: This wire comprises a conductor 11 made from an alloy of one or two kinds or more of metals selected from among copper, aluminum, and silver, on top of which a protective layer 12 made from an alloy of one or two kinds or more of metals selected from am ong titanium, chromium, tungsten, niobium, lead, tin, zing, silver, gold, and platinum is formed by vapor deposition, plating, forming, or die drawing, etc., with an insulating layer 13 provided thereon, made from a polyethylene or a fluororesin, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ammonia resistant insulated wire suitable for electric equipment such as refrigerators used in an ammonia atmosphere.

[0002]

2. Description of the Related Art Conventionally, fluorocarbon refrigerants have been used as refrigerating machine refrigerants, but their use is being limited due to problems such as destruction of the ozone layer. Therefore, ammonia, which has been widely used as a refrigerant for refrigerators, has begun to be reviewed again. Ammonia as a refrigerant has a high refrigerant capacity,
Although it has advantages such as being inexpensive, the winding of a closed or semi-closed refrigerator needs to have sufficient ammonia resistance in order to exhibit strong corrosion resistance.

As an ammonia-resistant insulated electric wire applicable to such an application, there is one disclosed in Japanese Patent Application Laid-Open No. 5-252680. In this structure, an intermediate coating layer made of an ammonia-resistant metal containing ammonia, nickel and iron is provided on a conductor such as copper, and an insulating layer made of polyethylene or the like is provided on the intermediate coating layer. In this insulated wire, there are few kinds of ammonia-resistant metal, and lack of versatility of structure, there is a problem that the field of use is limited.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obtain an ammonia resistant insulated electric wire having a sufficient ammonia resistance, a variety of structures, and a wide range of applications.

[0005]

[Means for Solving the Problems]
Described titanium, chromium, tungsten, niobium, zinc,
An insulated wire, wherein an insulating layer is provided on a conductor made of an alloy of one or more of tin, lead, silver, gold, and platinum (hereinafter referred to as an ammonia-resistant metal first group). An insulated wire in which a protective layer made of the first group of ammonia-resistant metal is provided on a conductor made of an alloy of one or more of copper, aluminum and silver, and an insulating layer is provided on the protective layer. An insulating layer is provided on the conductor according to 3, and any one or more of titanium, chromium, tungsten, niobium, zinc, tin, lead, silver, gold, platinum, aluminum, nickel and iron is provided on the insulating layer. The problem can be solved by an insulated wire provided with a protective layer made of the alloy (1) (hereinafter referred to as the second group of ammonia-resistant metal) or an insulated wire further provided with a resin coating layer.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first example of an ammonia-resistant insulated electric wire of the present invention, in which reference numeral 1 is a conductor. The conductor 1 is made of a first group of ammonia resistant metal and has an outer diameter of about 0.3 to 3.0 mm. Each of the metals in the first group of ammonia-resistant metals and their alloys are originally excellent in ammonia resistance.
For this reason, the conductor 1 has a function as an original conductor for passing an electric current and a function as an ammonia resistant layer at the same time. An insulating layer 2 is provided on the conductor 1. The insulating layer 2 is made of synthetic resin having excellent ammonia resistance, such as polyethylene, crosslinked polyethylene, chlorosulfonated polyethylene, polypropylene, polyvinyl chloride, and fluororesin, and has a thickness of about 10 to 200 μm. It was formed by.

In the ammonia-resistant insulated electric wire of this example, the metal itself forming the conductor 1 has ammonia resistance, and the insulating layer 2 covering the metal is also made of a synthetic resin having good ammonia resistance. It has very high ammonia resistance. However, the metals of the first group of ammonia-resistant metals have a relatively large electric resistance, and therefore are unsuitable for applications having a long usage length, and are limited to applications having a short usage length.
However, it goes without saying that if the diameter of the conductor 1 is increased, the conductor 1 can be used for a long one to some extent. Furthermore, since the conductor 1 can be selected from various metals in this one,
Those having high ammonia resistance or extremely high ammonia resistance can be freely manufactured according to the degree of demand, and the range of choice is broadened.

FIG. 2 shows a second example of the ammonia-resistant insulated electric wire of the present invention, in which reference numeral 11 is a conductor.
The conductor 11 is the same as a commonly used conductor made of highly conductive copper, aluminum, silver or an alloy thereof. The diameter of the conductor 11 is not particularly limited, but is usually about 0.1 to 3.0 mm.

A protective layer 12 is provided on the conductor 11. The protective layer 12 is a relatively thin film layer of the above-mentioned ammonia-resistant metal first group and having a thickness of 1 to 100 μm, and is formed by a method such as vapor deposition, plating, forming, and die drawing. Here, forming means wrapping a conductor with a tape-like metal, welding the joints, and drawing and crimping with a die. Die drawing means covering the conductor 1 with a pipe made of an ammonia-resistant metal first group. Then, the pipe is drawn out with a die, the diameter of the pipe is reduced, and the pipe is mechanically connected to the conductor 1. The protective layer 12 is for protecting the conductor 11 from ammonia.

An insulating layer 13 is provided on the protective layer 12. The insulating layer 13 provides electrical insulation and ammonia resistance, and is made of a synthetic resin having excellent ammonia resistance such as polyethylene, crosslinked polyethylene, chlorosulfonated polyethylene, polypropylene, polyvinyl chloride, and fluororesin. The thickness is about 10 to 200 μm, and is formed by an extrusion coating method or the like.

In the insulated wire of the second example, since the metal having good conductivity is used as the conductor 11, it can be used as a long product, and the protective layer 12 and the insulating layer 13 make it extremely possible. High ammonia resistance is obtained. Moreover, since the conductor 11 is made of an inexpensive material, the manufacturing cost does not increase. Further, the range of selection is widened as in the case of the first example, and it can be applied to various uses.

FIG. 3 shows a third example of the present invention, in which reference numeral 21 is a conductor. This conductor 21 is made of copper,
Diameter of aluminum, silver or alloys of these
It is 1 to 3.0 mm. An insulating layer 22 is provided on the conductor 21. The insulating layer 22 is formed by applying an insulating varnish such as polyvinyl formal, polyester, polyester imide, polyamide imide, polyester amide, polyurethane, polyhydantoin, and epoxy nylon onto the conductor 21 and baking the varnish.
It is about 0 μm. For the portion composed of the conductor 21 and the insulating layer 22, those which are manufactured and sold as ordinary insulated electric wires (magnet wire, enamel wire) can be used as they are.

A protective layer 23 is provided on the insulating layer 22. The protective layer 23 is composed of the above-mentioned second group of ammonia-resistant metal and has a thickness formed by a method such as vapor deposition, winding, and die drawing. It is in the range of 1 to 100 μm. The ammonia-resistant metal second group is a group obtained by adding aluminum, iron, nickel and alloys thereof to the ammonia-resistant metal first group, and is a metal group having good ammonia resistance.

The ammonia-resistant insulated electric wire of this example can be obtained by simply forming a protective layer 23 on the insulating layer of an ordinary insulated electric wire as a base, so that the production is simplified. Further, by appropriately selecting the metal forming the protective layer 23, the degree of ammonia resistance can be freely changed according to the application and the like. Furthermore, since the conductor 21 is made of a metal having good conductivity, it can be used as a long one, and its application range is wide. In addition, since the metal of the protective layer 23 can be selected from many kinds of metals,
The applicable range is wider than that of the insulated wire of the second example.

FIG. 4 shows a fourth example of the ammonia-resistant insulated electric wire of the present invention, which is further formed on the protective layer 23 of the insulated electric wire of the third example shown in FIG. The resin coating layer 24 is provided. This resin coating layer 24 is
A material having ammonia resistance is preferable, but since the protective layer 23 and the insulating layer 22 are present underneath this, it does not necessarily require a high degree of ammonia resistance.
It may be made of polyethylene, polypropylene or the like having a thickness of 0 to 200 μm.

In this example, since the outermost layer of the insulated wire is the resin coating layer 24, the flexibility and slipperiness of the outermost layer surface are good, and the workability at the time of winding processing is good. Becomes

Hereinafter, specific examples will be described. (Example 1) A single wire of titanium having an outer diameter of 0.3 mm was used as a conductor 1, and a low density polyethylene was extrusion-coated on the single wire to provide an insulating layer 2 having a thickness of 150 μm, and the ammonia resistance of the first example was obtained. An insulated wire was created.

(Embodiment 2) The outer diameter of the conductor 1 is 0.5 mm.
A single wire of chrome was used, and polyvinyl fluoride was extrusion-coated on the single wire to provide an insulating layer 2 having a thickness of 100 μm to prepare an ammonia resistant insulated electric wire of the first example.

(Embodiment 3) The conductor 11 has an outer diameter of 0.5.
mm annealed copper wire with a thickness of 150 on it
A protective layer 12 having a thickness of 100 μm is formed by drawing, and low density polyethylene is extrusion-coated on the protective layer 12 to have a thickness of 100 μm.
m insulating layer 13 was provided to produce the ammonia-resistant insulated electric wire of the second example.

(Embodiment 4) The conductor 11 has an outer diameter of 0.6.
mm of 3g-97Cu silver-filled copper single wire is used, and tin is vacuum-deposited on this to form a protective layer 12 having a thickness of 50 μm.
A second ammonia resistant insulated electric wire was prepared by providing an insulating layer 13 of 0 μm.

(Embodiment 5) The conductor 21 has an outer diameter of 0.5.
An annealed copper wire having a thickness of 20 mm was used to apply an insulating varnish made of polyesterimide on the annealed copper wire, and the baking was performed to form an insulating layer 22 having a thickness of 20 μm. A protective layer 23 made of aluminum and having a thickness of 100 μm was provided on the insulating layer 22 by a forming method to prepare an ammonia resistant insulated electric wire of the third example.

Example 6 A commercially available polyesteramide wire (conductor diameter 0.5 mm, coating diameter 0.6 mm) was prepared, and a protective layer 2 made of stainless steel and having a thickness of 100 μm was provided thereon.
3 was provided by the forming method to prepare the ammonia resistant insulated electric wire of the third example.

(Embodiment 7) A low-density polyethylene is extrusion-coated on the protective layer 23 of the insulated wire obtained in Embodiment 5 to form a resin coating layer 24 having a thickness of 100 μm, and the resistance of the fourth embodiment is improved. Ammonia insulated wire was created.

(Embodiment 8) A protective layer 23 of the insulated wire obtained in Example 6 is extrusion-coated with polypropylene to form a resin coating layer 24 having a thickness of 150 μm, and the ammonia resistance of the fourth example is obtained. An insulated wire was created.

The ammonia resistance of the eight types of ammonia-resistant insulated wires obtained as described above was evaluated. At the bottom of the glass desiccator, add concentrated ammonia water (28
%), And a wound material of eight kinds of ammonia resistant insulated electric wires was hung on the upper part. The desiccator was sealed and left in an oven at a temperature of 60 ° C. for 1 month. After the period ends,
The wound material was taken out from the desiccator and washed, and then the surface condition of the wound material was observed with the naked eye and a stereoscopic microscope to observe the corroded condition. As a result, no corrosion was observed in any of the eight types of ammonia resistant insulated electric wires, and excellent ammonia resistance was confirmed.

[0026]

As described above, according to the present invention, it has a high degree of ammonia resistance and its structure is rich in diversity,
Ammonia-resistant insulated wires with a wide range of applications can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first example of an ammonia-resistant insulated electric wire of the present invention.

FIG. 2 is a sectional view showing a second example of the ammonia-resistant insulated electric wire of the present invention.

FIG. 3 is a sectional view showing a third example of the ammonia-resistant insulated electric wire of the present invention.

FIG. 4 is a sectional view showing a fourth example of an ammonia-resistant insulated electric wire of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 conductor 2 insulating layer 11 conductor 12 protective layer 13 insulating layer 21 conductor 22 insulating layer 23 protective layer 24 resin coating layer

Claims (4)

[Claims] 1. An ammonia-resistant insulated electric wire having an insulating layer provided on a conductor made of an alloy of one or more of titanium, chromium, tungsten, niobium, zinc, tin, lead, silver, gold and platinum. . 2. Titanium, chromium, on a conductor made of an alloy of one or more of copper, aluminum and silver,
An ammonia-resistant insulated electric wire comprising a protective layer made of an alloy of one or more of tungsten, niobium, zinc, tin, lead, silver, gold and platinum, and an insulating layer provided on the protective layer. 3. An insulating layer is provided on the conductor, and titanium, chromium, tungsten, niobium, zinc, tin,
An ammonia-resistant insulated electric wire provided with a protective layer made of an alloy of one or more of lead, silver, gold, platinum, aluminum, nickel, and iron. 4. An ammonia-resistant insulated electric wire in which a resin coating layer is further provided on the protective layer of the ammonia-resistant insulated electric wire according to claim 3.