JPH03264780A - Closed type electric motor-driven compressor - Google Patents

Abstract

PURPOSE:To protect a glass part in a hermetically sealed terminal par from metal dust so as to prevent an electric spark from its generation by providing a fence, which is mostly fitted to a peripheral flange part of the hermetically sealed terminal part by coating it, in a side of the hermetically sealed terminal part of a housing connected thereto. CONSTITUTION:A hermetically sealed terminal part 1, secured to a hermetically sealed vessel 7 of a closed type electric motor-driven compressor, has a metal outer ring 4 having three through holes 2, and a pin 5 is inserted into each through hole 2 through a glass 6. Here a fence 21, which can be fitted to a peripheral circular flange part 22 of the hermetically sealed terminal part 1, is integrally formed in a housing 14 for housing a receptacle 15 fitted to each pin 5. Connection of the receptacle 15 to the hermetically sealed terminal part 1 is completed by insertion-fitting this housing 14 into the peripheral circular flange part 22 in the hermetically sealed terminal part 1 in a predetermined position of the pin 5 and the receptacle 15. In this way, metal dust, generated in the hermetically sealed vessel 7, is prevented from sticking to the glass part 6 by means of the fence 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hermetic compressor for use in refrigeration systems having an improved connection between sealed terminals and internal electrically powered elements.

Prior art FIG. 2 shows a conventional sealed terminal portion disclosed in Japanese Patent Application Laid-Open No. 62-271975.

l is a sealed terminal part, and c is a metal outer ring φ (not shown).
3 is a cylindrical part surrounding the through hole 2,
! 7 is a pin inserted into the through hole 2 and sealed to the glass T, 7 is an airtight container to which the sealed terminal portion L is fixed, and Z is a solid board made of synthetic resin (not shown). pin! Receptacle that fits into the l! 16 is a lead wire connected to the electric motor section.

Electrical connection to the conventional sealed terminal portion will be explained below.

First, the three small diameter holes in the insulating plate t of the sealed terminal part fixed to the sealed container 7 correspond to the three pins of the sealed terminal part l! The insulating plate t is attached to the sealed terminal part l by inserting the folded part 2 into the metal outer annular casing in a press-fit state.

Next is the sealed terminal section with 103 pins! Receptacle that fits into the l! Housing l← to store, pin! By fitting and inserting the handle septacle /j, the connection between the sealed terminal parts l and the like is completed.

Problems to be Solved by the Invention However, with the above structure, it is necessary to shape the bottom of the insulating plate t using synthetic resin in a separate process, and also requires a lot of man-hours for attaching the insulating plate ♂ and inserting the housing at the time of connection. There will be more.

In view of the above-mentioned problems, the present invention provides a sealed electric compressor having a sealed terminal part for constructing an electrical connection that provides the function of the insulating plate g to the housing l← to ensure safety and simplify the work man-hours. The machine for providing the motor is composed of a sealed container, a sealed terminal part fixed to the sealed container, a compression mechanism part and an electric element part housed in the sealed container, and a stator constituting the electric element part. A receptacle that fits into the pin of the sealed terminal portion and a housing that accommodates the receptacle are provided, and the housing is provided with a housing that covers the sealed terminal portion and has a circular flange on the outer periphery of the sealed terminal portion, on the side of the sealed terminal portion of the housing. It has a structure with a barrier that fits into it.

Effect of the present invention As in the structure described above, the glass portion of the sealed terminal portion is protected from metal powder such as iron powder, copper powder, etc. in the sealed container by the barrier that almost fits into the sealed terminal portion provided in the housing. Therefore, sparks can be easily prevented from occurring in the glass portion through the metal powder.

Embodiment FIG. 1 shows a sectional view of an embodiment of a connection section between a sealed terminal section and a housing of a hermetic electric compressor according to the present invention.

For parts with the same parts and functions as the conventional example,
Explanation of the same reference numerals will be omitted.

In the figure, reference numeral 21 denotes a barrier that fits into the outer circumferential circular flange portion 22 of the sealed terminal portion l provided in the housing lψ.

Sealed terminal part l and housing l configured as above←
This section explains the connections and functions.

The hermetic electric compressor of the present invention has a pin of the hermetically sealed terminal l fixed to the hermetic container 7! Connect the housing l≠ containing the receptacle/j that fits into the specified pin! and receptacle l
! By inserting and mating in the position of Shichi Shichibutataru l!
The connection to the sealed terminal portion l is completed.

In the present invention, at this time, the barrier 21 provided on the sealed terminal portion l side of the housing lφ is approximately fitted into the outer circumferential circular flange portion 22 of the sealed terminal portion/to cover the sealed terminal portion l. By preventing metal powders such as iron powder and copper powder generated in the terminal 7 from adhering to the glass portion 6 of the sealed terminal portion l, electric sparks are prevented from being generated in the glass portion t through the metal powder. It is possible to prevent this.

Effects of the Invention As described above, the present invention provides a housing 14 connected to a sealed terminal portion l! By providing a barrier 2 which covers the sealed terminal part l on the sealed terminal part l side and which approximately fits into the outer circumference part 2.2 of the sealed terminal part l, the glass part 6 of one sealed terminal part l is covered with metal powder. The housing/
Distant relatives can be established by simply installing the device 4, which has the effect of reducing the number of man-hours and improving reliability.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the connection between the sealed terminal portion and the housing in an embodiment of the hermetic electric compressor of the present invention;
FIG. 2 shows a cross-sectional view of a connection between a conventional sealed terminal and a housing. /: sealed terminal part, 3: cylindrical part, ri: metal outer ring, ! : Pin, 6: Glass part, 7: Sealed container, /←: Housing, l! : Receptacle, 2/: Barrier, 22: Outer collar.

Claims (1)

[Claims] It consists of a sealed container, a sealed terminal part fixed to the sealed container, a compression mechanism part housed in the sealed container, and an electric element part, and a stator constituting the electric element part is fitted with a pin of the sealed terminal part. A mating receptacle and a housing for accommodating the receptacle are provided, and a barrier is provided on the sealed terminal side of the housing to cover the sealed terminal and approximately fit into the outer circular flange of the sealed terminal. A hermetic electric compressor characterized by: