JPS62284974A - Enclosed compressor - Google Patents

Abstract

PURPOSE:To prevent a pin from a slipping out of a sealing terminal without fail, by installing a terminal block in the pin situated in a hermetically sealed vessel, in case of a device which installs the sealing terminal, having the pin, in this hermetically sealed vessel having an electrically driven element and a compression element both built-in. CONSTITUTION:An enclosed compressor is made up of setting up an electrically driven element 2 consisting of a stator 10 and a rotator in the upper part of a hermetically sealed vessel 1, and a compression element (unillustrated herein) in the lower part, respectively, and the stator 10 is energized with a continuous rating current via a lead wire (unillustrated herein). This lead wire is connected to a pin 6 of a sealed type terminal 4 to be pierced through and clamped to the hermetically sealed vessel 1, while the sealed type terminal 4 inserts the pin 6 into a hole 7 installed the body 5, and sealed and clamped thereto by a glass seal 8. In this case, there is provided with an insulating sleeve 9 larger in diameter than that of the hole 7 so as to cover an outer circumference of the pin 6, while a terminal block 12 is welded as situated in a pin end. With this constitution, when the glass seal 8 is broken, prevention of slipping out the pin 6 is promoted with contact of the terminal block 12 to the insulating sleeve 9.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a hermetic compressor, and particularly to a hermetic compressor suitable for improving safety.

[Conventional technology]

A conventional hermetic compressor is explained with reference to Fig. 2. 7. An electric element l is placed in the upper part of the hermetic container 1, and a compression element (@not shown) is shown in the lower part.
A sealed terminal 4 is attached to the upper wall surface of the sealed container 1 so as to penetrate therethrough. b The sealed terminal 4 is connected to the body 5 welded to the sealed container 1.

A lead wire (not shown) of a stator 10 that constitutes an electric element unit, consisting of a current conducting pin 6, a glass seal 8 that connects the pin 6 and a hole 7 of the body 5, and an insulating sleeve 9.
is connected to the pin 6 on the inside of the sealed container l, and connected to the power source on the outside. The pin 6 is provided with a flange portion 11, and an insulating sleeve 9 is disposed between the flange portion 11 and the glass seal 8, and inside the compressor, f4. Carbide generated by abnormal heating of the dynamic element adheres to the surface of the insulator, causing insulation failure, and glass seals are damaged by overheating due to arc current, or edge defects such as metal powder adhesion due to abrasion from the compression mechanism. Even if the glass seal melts due to a similar problem, the pin 6 is prevented from coming out of the sleeve 9 by the flange 11 at the internal pressure of the compressor (usually 15 to 30 kg/c+JG).

However, in such a structure, consideration is given to the fact that if the flange part collides with the edge of the hole formed in the body, the flange part will lack strength and may not be able to function as a stopper. It wasn't.

Note that Japanese Patent Application Laid-Open No. 58-48444 is cited as related to this type of hermetic compressor.

[Problem that the invention seeks to solve]

The above conventional technology does not take into account the strength between the pin and the flange, and when the internal pressure is high.

There was a risk that the pin would come off the body.

An object of the present invention is to provide a hermetic compressor in which the pins do not come off under any circumstances.

[Means for solving problems]

The object of the present invention is to provide a hermetic compressor in which an electric element and a compression element rotated by the rotation of the electric element are provided in a hermetically sealed container, and a sealed terminal having a pin is provided in the hermetic container. This is achieved by providing a terminal plate on the pin located at.

[Effect]

Since the terminal plate provided on the pin is larger than the hole diameter of the lid, the terminal plate collides with the lid even if the pin moves in the direction of removal. This prevents the pin from falling out of the hole.

[Example] An example of the present invention will be described below with reference to FIG. The structure of the sealed terminal 4 inside the sealed container includes a body 5, a current conducting pin 6, a glass seal 8 that connects the pin 6 and the hole 7 of the body 5, and a structure that connects to the glass seal and covers the outer periphery of the pin 6. In addition, an insulating sleeve 9 made of ceramic, for example, having a larger diameter than the hole 7 of the body 5 is provided, and a terminal plate 12 is welded to the end of the pin 6 adjacent to the sleeve 9.

According to this embodiment, when the glass seal is broken due to an abnormal accident in the compressor as described above, the terminal plate 12 comes into contact with the insulating sleeve 9, and the current conducting pin 6 to which the terminal plate 12 is welded, Even if pressure is applied from the inside of the airtight container to the outside, it will not pop out. Therefore, the current conducting pin 6 does not need to be provided with a flange portion, and may be a straight pin having the same diameter, so that the manufacturing cost can be extremely low.

〔Effect of the invention〕

According to the present invention, even if the current conducting pin 6 is subjected to large pressure blowing from the inside to the outside of the closed container 1 due to an abnormal accident inside the compressor, the current conducting pin 6 is retained by the insulating sleeve 9 by the terminal plate 12. Safety can be ensured since the pin 6 does not fly out.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a main part of an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a main part of a conventional hermetic compressor. l...Airtight container, l...'! 4. Dynamic elements, 4...
Sealed terminal, 5...Body, 5a...Lid, 6.
...Current conduction pin. 7... Hole, 8... Glass seal, 9... Insulating sleeve. IO...Stator, 11...Flange part, 12...
terminal board. ≧ 1st mouth 619. Electric 3-maru etc. IT bin? ,,,JL 8, λ seal 91.・Leave 12 in red t5... Hanawa) board

Claims (1)

[Claims] 1. A hermetic compressor that includes an electric element and a compression element that rotates by rotation of the electric element in a hermetically sealed container, and a sealed terminal having a pin in the hermetically sealed container. A hermetic compressor characterized by having a terminal plate on the pin.