JPH05126048A - Hermetic type compressor - Google Patents

Abstract

PURPOSE:To prevent metallic powder and the like from adhering on the insulating members, and thereby prevent the occurrence of poor insulation by holding a cylindrical cover made of insulating resin between a cluster and a metallic outer ring, and thereby closely adhering the outer circumference of the cylindrical cover onto the inner surface of the metallic outer ring. CONSTITUTION:A connecting spring terminal 10 is installed on the tip end of each lead wire 9 pulled out of an electric motor for driving a compression means, and the connecting spring terminal 10 is connected to a conductive pin terminal section 4a. Each conductive pin 4 is held by the hole section 7 of a metallic outer ring 6 while being insulated via each insulating member 5 so as to be connected to an external power supply, so that power is supplied to an electric motor. A cluster 11 covers a connecting section between the connecting spring terminal 10 and each conductive pin 4, and a conductive cover 12 is closely adhered onto the inner surface of the metallic outer ring 6 at its outer circumferential section, so that a through-hole through which each conductive pin 4 is penetrated, is provided. By this constitution, the insulating member 5 is isolated from the inside of a hermetic container 1 where metallic powder and the like exist, the metallic powder and the like are consequently prevented from being adhered thereon, so that short circuit current is thereby prevented from flowing to each conductive pin 4 and the metallic outer ring 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetically-sealed electric compressor which prevents insulation failure at terminals inside a hermetically sealed container.

[0002]

2. Description of the Related Art Generally, in a hermetic container of a hermetic compressor,
There is metal powder generated in the welding and sliding parts of the container.
These metal powders are carried by the refrigerant to various parts in the closed container and adhere to them, and also adhere to the insulating member of the power supply terminal part. If a large amount of metal powder adheres to the insulating member and a large voltage is applied to the terminals when the compressor is restarted, etc., a short circuit current will flow between the conductive pin and the metal outer ring through the metal powder. May cause the danger of.

An example of a conventional hermetic electric compressor will be described below with reference to the drawings. FIG. 7 shows Japanese Patent Laid-Open No. 1-2.
The cross-sectional view of the power feeding terminal of the conventional hermetic electric compressor in No. 37369 is shown, and the opening 2 is formed in a part of the hermetic container 1 which is the main body of the hermetic electric compressor. A terminal 3 for use is provided.

The power supply terminal 3 is for holding the conductive pin 4 in a penetrating manner corresponding to each lead wire provided in the closed container 1, and each conductive pin 4 is provided with an insulating member 5 through an outer metal ring. As a result of being supported by the holes 7 of the conductive pins 4
Are electrically isolated from each other. The metal outer ring 6
Is supported in a state of being fitted in the opening 2 of the closed container 1, and an insulating deterioration prevention plate 8 is provided in contact with the outer periphery of the metal outer ring 6 from the inside of the closed container 1. The insulation deterioration prevention plate 8 is formed of a flame-retardant resin, and metal powder or foreign matter generated from a bearing, a connecting rod or the like, which is a sliding portion of the electric compressor, causes the insulation deterioration prevention plate 8 and the metal outer ring 6 to be separated from each other. Prevents intrusion between.

[0005]

However, in the conventional structure as described above, a gap is apt to be formed between the metal outer ring 6 and the insulation deterioration preventing plate 8, and metal powder or foreign matter is generated from the gap in the insulation preventing plate 8. There is a problem that the metal enters into the space between the metal outer rings 6 and adheres to the insulating member to cause a short circuit current to flow.

In view of the above problems, it is an object of the present invention to provide a hermetic electric compressor that prevents insulation failure in the conductive pin connection portion.

[0007]

In order to solve this problem, a hermetic electric compressor according to the present invention is provided with an opening in a part of a hermetic container for hermetically housing an electric motor and a compression means driven by the electric motor. A power supply terminal for supplying power to the electric motor is provided in the opening, and the power supply terminal is supported by the metal outer ring and the metal outer ring via an insulating member. A plurality of conductive pins connected to a plurality of lead wires from the inside, wherein the plurality of lead wires are bundled by a cluster of insulating resin and inserted into the plurality of conductive pins The insulating resin cylindrical cover having a hole through which the plurality of conductive pins penetrate, the outer periphery of the cylindrical cover and the inner surface of the metal outer ring are closely contacted, and between the cluster and the metal outer ring. Sandwich Dolphins, or is characterized in that the cylindrical cover of insulating resin covers the metal outer ring becomes the cluster integrally.

[0008]

In the hermetic compressor according to the present invention, the insulating resin columnar cover is sandwiched between the cluster and the metal outer ring, and the outer periphery of the columnar cover and the inner surface of the metal outer ring are in close contact with each other, so that the insulating member forms the columnar cover. Since it is covered with the metal outer ring, it is possible to prevent adhesion of metal powder or the like to the insulating member.

Further, even if the cylindrical cover of the insulating resin is hollow and the cylindrical bottom surface is formed on the side facing the cluster, the same effect can be obtained and the material cost can be saved.

Further, by making the outer diameter of the insulating resin columnar cover on the side facing the metal outer ring smaller than the diameter on the side facing the cluster and tapering, the same effect can be obtained and the assembly is facilitated. Is obtained.

Further, in the hermetic compressor of the present invention, the same effect can be obtained by integrally forming the cover of the insulating resin and the cluster, and the effect of simplifying the working process can be obtained.

[0012]

The first, second, third and fourth embodiments of the hermetic compressor according to the present invention will be described below with reference to the drawings. It should be noted that the same components as those of the related art will be denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a view of a power supply terminal of a hermetic compressor according to a first embodiment of the present invention, and FIG. 2 is a perspective view of the cylindrical cover of FIG.

A connecting spring terminal 10 is attached to the tip of each lead wire 9 drawn out from an electric motor for driving a compression means (not shown in FIG. 1), and each connecting spring terminal 10 is connected to a conductive pin connecting portion 4a. .. Like the conventional example, the conductive pin 4 is insulated and held in the hole 7 of the metal outer ring 6 through the insulating member 5 and connected to the external power source to supply the electric power to the electric motor. Reference numeral 11 covers a connecting portion between each of the lead wires 9 and the connecting spring terminal 10 and a connecting portion between the connecting spring terminal 10 and the conductive pin 4. Reference numeral 12 is a cylindrical cover made of an insulating resin.
Is provided with a hole.

With this structure, the insulating member 5 is separated from the inside of the closed container 1 in which the metal powder or the like exists, and as a result, the adhesion of the metal powder or the like is prevented and the short circuit current is prevented from flowing between the conductive pin 4 and the metal outer ring 6. it can.

FIG. 3 is a diagram of a power supply terminal of a hermetic compressor according to a second embodiment of the present invention. Descriptions of the same configurations and functions as those of the embodiment shown in FIG. 1 will be omitted.

In FIG. 3, reference numeral 13 denotes a hollow cylindrical cover having a cylindrical bottom surface formed on the side facing the cluster 11, which has the same effect as that of the embodiment shown in FIG. 1 and further can reduce the material cost. Become.

FIG. 4 is a diagram of a power supply terminal of a hermetic compressor according to a third embodiment of the present invention. Descriptions of functions similar to those of the embodiment shown in FIGS. 1 and 3 are omitted.

In FIG. 4, 14 is a cylindrical cover, and the outer diameter 14a on the side facing the metal outer ring is smaller than the outer diameter 14b on the side facing the cluster 11, and is tapered. It has the same effect as the example and further facilitates the assembly.

FIG. 5 is a diagram of a power supply terminal of a hermetic compressor according to a fourth embodiment of the present invention, and FIG. 6 is a diagram of FIG.
3 is a perspective view of the cover of FIG. Descriptions of functions similar to those of the embodiment shown in FIGS. 1, 3 and 4 are omitted.

Reference numeral 15 in FIG. 5 indicates the cylindrical cover 1 of FIG.
This is a cover made of an insulating resin in which 4 and the cluster 11 are integrated. By integrating them, the same effects as those of the embodiment shown in FIGS. 1, 3 and 4 can be obtained, and the assembly can be performed in one step, and the working steps can be simplified.

[0022]

As described above, according to the present invention, in a power supply terminal of a hermetic electric compressor equipped with an electric motor and a compression means, a hole through which a conductive pin penetrates is formed in a cylindrical cover made of a heat-resistant insulating resin. By providing the outer circumference of the cylindrical cover with the inner surface of the metal outer ring, the insulating member for insulating and supporting the conductive pin is isolated from the inside of the closed container containing the metal powder or the like to prevent adhesion of the metal powder or the like to the insulating member. It is possible to prevent a short circuit current from flowing through the conductive pin and the metal outer ring.

Further, by making the cylindrical cover of insulating resin hollow and further forming a cylindrical bottom face on the side facing the cluster, it is possible to prevent a short-circuit current from flowing between the conductive pin and the metallic appearance. You can save money.

Further, by making the outer diameter of the bottom surface of the cylindrical cover of the insulating resin on the metal outer ring side smaller than the outer diameter of the bottom surface on the cluster side, it is possible to prevent a short-circuit current from flowing between the conductive pin and the metal outer ring. Assembling work can be facilitated.

Further, by integrating the insulating resin columnar cover and the cluster, it is possible to prevent a short-circuit current from flowing through the conductive pin and the metal outer ring, and to simplify the working process.

[Brief description of drawings]

FIG. 1 is a sectional view of a power feeding terminal of a hermetic compressor showing an embodiment of the present invention.

FIG. 2 is a perspective view of the cylindrical cover of FIG.

FIG. 3 is a sectional view of a power feeding terminal of a hermetic compressor showing another embodiment of the present invention.

FIG. 4 is a sectional view of a power supply terminal of a hermetic compressor showing another embodiment of the present invention.

FIG. 5 is a sectional view of a power supply terminal of a hermetic compressor showing another embodiment of the present invention.

6 is a perspective view of the cover of FIG.

FIG. 7 is a sectional view of a power supply terminal of a conventional hermetic compressor.

[Explanation of symbols]

 1 Airtight Container 2 Opening 3 Power Supply Terminal 4 Conductive Pin 4a Conductive Pin Connection 5 Insulating Member 6 Metal Outer Ring 7 Metal Outer Ring 6 Hole 9 Lead Wire 10 Connection Spring Terminal 11 Cluster 12, 13, 14 Column Cover 14a , 14b Cylinder cover outer diameter 15 Cover 16 holes

Front Page Continuation (72) Inventor Koichi Tsuchiya 3-22 Takaida Hondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerator Co., Ltd. In-house (72) Inventor Shuichi Yakushi 3-22 Takaidahondori, Higashi-Osaka City, Osaka Prefecture Matsushita Cold Machinery Co., Ltd.

Claims (4)

[Claims] 1. An opening is provided in a part of a hermetically sealed container for hermetically housing an electric motor and a compression unit driven by the electric motor, and a power supply terminal for supplying electric power to the electric motor is provided in the opening, and the power supply terminal is provided with the power supply terminal. The terminal includes a metal outer ring fitted into the opening, and a plurality of conductive pins supported by the metal outer ring via an insulating member and connected to a plurality of lead wires from the inside of the closed container, A plurality of lead wires are bundled by a cluster of insulating resin and inserted into the plurality of conductive pins, and a hole through which the plurality of conductive pins penetrates a cylindrical cover of insulating resin having heat resistance. The hermetic compressor is characterized in that the outer periphery of the columnar cover and the inner surface of the metal outer ring are brought into close contact with each other and sandwiched between the cluster and the metal outer ring to cover the insulating member. 2. The hermetic compressor according to claim 1, wherein the cylindrical cover is hollow and a cylindrical bottom surface is formed at least on the side facing the class. 3. The hermetic compression according to claim 1, wherein the outer diameter of the side of the cylindrical cover facing the metal outer ring is smaller than the diameter of the side facing the cluster and is tapered. Machine. 4. The hermetic compressor according to claim 1, wherein a cylindrical cover and a cluster are integrally formed to cover the insulating member.