JPH04353275A - Sealed motor driven compressor - Google Patents

Abstract

PURPOSE:To provide a constitution of a gas-tight terminal of a sealed motor driven compressor whereby damage or crack of the glass thereof die to a thermal shock at the time of its production or welding thereof to a sealed vessel is prevented. CONSTITUTION:A sealed motor driven compressor comprises a sealed vessel 6, a compressor element contained in the sealed vessel 6, a motor driven element 7 and a gas-tight terminal 9 fixed gas-tightly to the sealed vessel 6. A conductive rod 10 which penetrates through a cylindrical hole 3 of the body 2 of the gas- tight has one or plural protrusion in its middle area and the protrusions are covered with an insulator 4 sealing the cylindrical hole 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to prevention of insulation defects in hermetic electric compressors used in household refrigerators and the like.

0002

BACKGROUND OF THE INVENTION In recent years, refrigerators have become widely used in ordinary households, but there are rare accidents in which airtight terminals are damaged due to insulation deterioration.

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

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

1 is an airtight terminal, 2 is a main body, and 3 is the main body 2.
4 is glass, 5 is a pin,
The pin 5 is fixed by the glass 4. Further, 6 is a sealed container, 7 is an electric element housed in the airtight container, and 8 is a cluster provided at an end of the electric element.

In the above configuration, the cluster 8 of the electric elements 7 housed in the airtight container 6 is connected to the airtight terminal 1, and external wiring (not shown) is connected to the outside of the airtight terminal 1. Electrical connection is completed by connecting
The electric element 7 operates a compression element (not shown) in the closed container to perform a compressor action.

[0007]

[Problems to be Solved by the Invention] However, in the above structure, the thermal shock applied to the glass 4 when manufacturing the airtight terminal 1 and when welding it to the airtight container 6 is
This had the problem of causing breakage and cracking of the glass 4.

[0008] In view of the above problems, the present invention provides a compressor that alleviates the thermal shock applied to the glass 4 and does not cause breakage or cracking of the glass 4.

[0009]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides that a conductive rod passing through a cylindrical hole of a main body of an airtight terminal has one or more convex portions at its center, and The terminal includes an airtight terminal whose protrusion is covered with an insulator that seals the cylindrical hole.

0010

[Function] With the above-described structure, the present invention is constructed with a relatively small amount of insulating material, so that thermal shock applied to the insulating material can be alleviated and breakage and cracking of the insulating material can be prevented.

[0011]

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

[0012] Components that are the same as those in the conventional example are designated by the same numbers, and portions that are the same in structure and operation are omitted.

FIG. 1 is a sectional view of a main part of a compressor showing an embodiment of the present invention, and FIG. 2 is a sectional view of an airtight terminal 9 showing an embodiment of the present invention. 10 is a pin having a convex portion 10a in the center, which passes through the cylindrical hole 2 and is connected to the convex portion 10a by the glass 4.
It is sealed to cover.

In the structure of the present invention as described above, since the volume of the glass 4 can be reduced, thermal shock is not applied to the glass 4 when manufacturing the airtight terminal 9 and when welding it to the airtight container 6. Also, damage and cracks can be prevented.

[0015]

As described above, according to the present invention, a conductive rod passing through a cylindrical hole of a main body of an airtight terminal has one or more convex portions at its central portion, and the convex portions are connected to the cylindrical portion. By providing an airtight terminal covered with an insulator that seals the airtight terminal, the thermal shock applied to the insulator during manufacturing of the airtight terminal and when welding it to a sealed container can be alleviated because the volume of the insulator is small. , damage, and cracks can be prevented. Furthermore, when a load is applied to the conductive rod in the axial direction, it is possible to withstand a larger load than in the conventional example.

[Brief explanation of drawings]

[Fig. 1] A sectional view of essential parts of a hermetic electric compressor in an embodiment of the present invention.

[Fig. 2] A cross-sectional view of an airtight terminal showing an embodiment of the present invention.

[Figure 3] Cross-sectional view of a conventional airtight terminal

[Figure 4] Cross-sectional view of main parts of a conventional hermetic electric compressor

[Explanation of symbols]

2 Main body 3 Cylindrical hole 4 Insulator 6. Airtight container 7　　　　Electric element 9 Airtight terminal 10 pin

Claims (1)

[Claims] 1. A cylindrical hole in a main body of the airtight terminal, comprising a hermetic container, a compression element housed in the airtight container, an electric element, and an airtight terminal hermetically fixed to the airtight container. A hermetic electric compressor characterized in that a conductive rod passing through the conductive rod has one or more protrusions at its center, and the protrusions are covered with an insulator that seals the cylindrical hole. .