JPH05126047A - Hermetic type motor driven compressor - Google Patents

Abstract

PURPOSE:To prevent accidents due to the failures of terminal sections caused by poor insulation and sparks at a space between the conductive pins of a feeder section and a space between each lead wire pulled out of an electric motor and each connecting section of the conductive pins in the inside of a hermetic container for a hermetic type motor driven compressor. CONSTITUTION:A device is made up of magnets 11 fixed around the periphery of an open section 3 which is a part of the inside of a hermetic container 1 in the feeder section 4 of a hermetic type motor driven compressor equipped with an electric motor 2 and a compression means.

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 a terminal portion inside a hermetically sealed interior.

[0002]

2. Description of the Related Art In recent years, refrigerators have become widespread in ordinary households, but short-circuit current due to insulation deterioration rarely flows and may cause many dangers.

A conventional hermetic electric compressor (hereinafter referred to as a compressor) will be described below with reference to the drawings.

FIG. 3 is a sectional view of a power supply terminal of a compressor disclosed in Japanese Patent Laid-Open No. 62-271975, and FIG. 4 is a sectional view of a main part of a compressor to which the power supply terminal is fixed.

In FIG. 4, 1 is a closed container, and 2 is an electric motor housed in the closed container. An opening 3 is formed in a part of the closed container 1, and a power feeding terminal portion 4 is provided in the opening 3. The power feeding terminal portion 4 holds the conductive pin 5 in a penetrating manner corresponding to each lead wire provided in the closed container 1.
Each conductive 5 pin is supported by the hole 8 of the metal outer ring 7 via the glass sealing portion 6, and the conductive pins 5 are electrically insulated from each other.

In the above structure, the metal outer ring 7 is supported in a state of being fitted into the opening 3 of the hermetically sealed container 1, and the peripheral portion of the metal outer ring 7 is located inside the hermetically sealed container 1 from the inner side. An insulation deterioration prevention plate 9 is provided so as to abut. The insulation deterioration prevention plate 9 is made of a flame-retardant resin, and metal powder generated from a bearing or a connecting rod, which is a sliding portion of the compressor, enters between the insulation deterioration prevention plate 9 and the metal outer ring 7. To prevent it.

[0007]

However, in the above structure, the macromolecules of the metal powder can be prevented from adhering to the conductive pin 5 and the glass sealing portion 6, but the fine metal powder easily penetrates. Due to deterioration of insulation between the conductive pins 5 and deterioration of surface insulation of the glass sealing portion 6, a leak current flows, the glass holding the conductive pins 5 is melted, and the power supply terminal portion is broken. Was there.

In view of the above problems, it is an object of the present invention to provide a compressor that prevents accidents such as insulation failure in the conductive pin connection portion and damage to the terminal portion due to sparks.

[0009]

In order to solve the above problems, the compressor of the present invention has an opening in a part of a hermetically sealed container for hermetically housing an electric motor and a compression means driven by the electric motor. Portion is provided with a power feeding terminal portion for feeding power to the electric motor, and the power feeding terminal portion is supported by an outer metal ring fitted in the opening portion through an insulating member and connected to a lead wire from the inside of the closed container. A plurality of conductive pins are provided, and a magnet plate is fixed to the periphery of the opening.

[0010]

According to the present invention, with the above-described structure, the fine magnet generated from the bearing or the connecting rod, which is the sliding portion of the compressor, by fixing the peripheral magnet plate at the opening of the closed container into which the power feeding terminal is fitted. It is possible to prevent accidents such as insulation failure between the conductive pins and damage to the terminal portion due to sparks by adsorbing various metal powders with the magnet of the magnet.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the compressor according to the present invention will be described below with reference to the drawings.

The same components as in the prior art are designated by the same reference numerals and detailed description thereof will be omitted. FIG. 1 is a cross-sectional view of essential parts of a compressor showing an embodiment of the present invention. Reference numeral 10 is a lead wire drawn from an electric motor for driving the compression means and connected to the conductive pin 5. The conductive pin 5 is insulated and held in the hole portion 8 of the metal outer ring 7 through the glass sealing portion 6 as in the conventional example, and is connected to an external power source to supply electric power to the electric motor. A magnet plate 11 is fixed to the periphery of the opening 3 in the closed container 1.

In the structure of the present invention as described above, the hermetically sealed container 1 is provided in the power supply terminal portion including the connecting portion between the lead wire 10 and the conductive pin 5 located inside the hermetically sealed container 1 and the glass sealing portion 6. Since the fine magnetic powder generated from the bearings, connecting rods, etc., which are the sliding parts of the compressor existing inside, is adsorbed by the magnetic force of the magnet plate 11, the conductive pin 5
Accidents such as terminal damage can be prevented due to poor insulation and sparks between the terminals.

Next, a second embodiment of the compressor of the present invention will be described with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 2 is a partial cross-sectional view of a compressor according to the second embodiment of the present invention. Reference numeral 10 is each lead wire drawn from the electric motor for driving the compression means, and is connected to the conductive pin 5 by a connection terminal (not shown). 12 is a lead wire 10
It is a cluster in which the connection between the and the conductive pin 5 is integrally covered with a heat-resistant insulating material. A magnet plate 13 is fixed to the cluster 12 on the opposite side of the connecting portion.

In the above-described structure, the power supply terminal portion 4 including the connecting portion between the lead wire 10 and the conductive pin 5 located inside the closed casing 1 and the glass sealing portion 6 is provided in the closed casing 1. Since fine metal powder generated from bearings and connecting rods, which are the sliding parts of existing compressors, is adsorbed by the magnetic force of the magnet plate 13, an accident such as terminal failure due to poor insulation between the conductive pins 5 and sparks may occur. Can be prevented.

[0017]

As described above, according to the present invention, in the power supply terminal of the compressor provided with the electric motor and the compression means, the magnet plate is fixed around the opening of a part of the closed container. Between the connection between the lead wire of the power supply terminal and the conductive pin and between the conductive pins, fine metal powder generated from bearings, connecting rods, etc., which are the sliding parts of the compressor, is adsorbed by the magnetic force of the magnet, It is possible to prevent accidents such as terminal damage due to poor insulation between the conductive pins and sparks.

Further, according to the present invention, the magnet plate is fixed to the cluster which is integrally covered with heat-resistant insulating material at the connecting portion between each lead wire drawn out from the electric motor and the conductive pin, so that the compressor slides. It can adsorb fine metal powder generated from bearings and connecting rods that are parts.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a compressor according to a first embodiment of the present invention.

FIG. 2 is a partial sectional view of a main part of a compressor according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a conventional power supply terminal of a compressor.

FIG. 4 is a sectional view of a main part of a conventional compressor.

[Explanation of symbols]

 1 Airtight Container 2 Electric Motor 3 Opening 4 Power Supply Terminal 5 Conductive Pin 6 Glass Sealing Part 7 Metal Outer Ring 10 Lead Wire 11 Magnet Plate 12 Cluster 13 Magnet Plate

Claims (2)

[Claims] 1. An opening is provided in a part of an airtight container for hermetically housing an electric motor and a compressor means driven by the electric motor, and a power supply terminal for supplying electric power to the electric motor is provided in the opening. A metal outer ring to be fitted, and a plurality of conductive pins supported by the metal outer ring through an insulating portion and connected to lead wires from the inside of the closed container, and a magnet plate is provided around the opening. A hermetic compressor that is fixed. 2. A plurality of conductive pins supported by an outer metal ring through an insulating member and connected to lead wires from the inside of the closed container, and a connecting portion between the plurality of conductive pins and the lead wires. The hermetic compressor according to claim 1, wherein the resin is integrally covered with an insulating resin having heat resistance, and a molded magnet plate is fixed to the resin.