JPH06257567A - Sealed compressor - Google Patents

Abstract

PURPOSE:To reduce the rate of temperature rise of an earth terminal by interposing a heat insulating material such as PBT between the earth terminal and a mounting bolt. CONSTITUTION:A bracket 2 secured to the sealed container 1 of a compressor is provided with a tapped hole 2a and an earth terminal 13 is mounted on the bracket 2 by means of a bolt 14. A heat insulating material 15 such as PBT is interposed between the earth terminal 13 and the bolt 14 and thereby the quantity of heat transferred from the mounting bolt 14 to the earth terminal 13 is reduced so that the rate of temperature rise of the earth terminal 13 can be reduced. Also, the mounting bolt 14 is made from stainless steel and thereby the quantity of heat transferred from the mounting bolt 14 is reduced so that the rate of temperature rise of the earth terminal 13 can be reduced. Further, the rate of temperature rise of the earth terminal 13 can be reduced also on the part of the bracket 2 by reducing the area of the tapped hole portion 2a of the bracket 2 in contact with the tapped hole projecting portion 13b of the earth terminal 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor, and more particularly to reducing the temperature of its ground terminal.

[0002]

2. Description of the Related Art In recent years, there has been a demand for reducing the temperature of an earth terminal of a hermetic compressor (hereinafter referred to as a compressor) (regulation of IEC335-1).

An example of a conventional compressor will be described below with reference to the drawings. FIG. 2 is an outer surface of a conventional compressor, which is shown in Japanese Patent Publication No. 53530-B / 81 of August 7, 1981, Italy. 1 is a closed container. 2 is a bracket fixed to the closed container 1 and 2a
Are some screw holes in the bracket. Reference numeral 3 is an earth terminal for connecting an external earth wire attached to the screw hole 2a. Reference numeral 3a is a hole for connecting the bracket 2 and the ground terminal 3. Reference numeral 4 denotes a bolt which is fixed in the screw hole 2a through the screw hole 3a.

Regarding the compressor configured as described above,
The operation will be described below. The earth terminal 3 is
The bolt 4 is used to pass through the hole 3a, and is fixed in the screw hole 2a of the bracket 2.

[0005]

However, in the above-described conventional structure, since the screw 4 directly contacts the material of the bracket and the material of the earth terminal, the heat transmitted to the bracket 2 as heat conduction in the heat of the closed container 1. Since it is easily transmitted to the earth terminal 3 via the screw 4, there is a problem that the temperature rise of the earth terminal 3a is high.

In view of the above problems, the present invention provides a compressor whose ground terminal temperature is reduced.

[0007]

In order to achieve this object, the compressor of the present invention comprises a heat insulating material such as PBT between the earth terminal and the mounting bolt.

The bolt is made of stainless steel having a low thermal conductivity. Further, the contact area between the bracket disposed on the outer surface of the compressor of the present invention and the convex portion of the ground terminal is reduced.

[0009]

The compressor of the present invention reduces the amount of heat transferred from the mounting bolt to the ground terminal.

Also, the amount of heat transferred from the mounting bolt is reduced. Also, reduce the amount of heat transferred from the bracket to the ground terminal.

[0011]

EXAMPLE A compressor according to an example of the present invention will be described below.
A description will be given with reference to the drawings. The same parts as those of the related art will be denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is an outer surface of a compressor according to an embodiment of the present invention. Reference numeral 1 is a closed container, 2 is a bracket fixed to the closed container, and 2a is a screw hole portion provided in the bracket 2. Reference numeral 13 is an earth terminal, 13a is a screw hole of the earth terminal, and 13b is the screw hole portion 1
3a, the convex portion of the screw hole, 14 is a bolt, 15 is P
A screw hole portion 15a is provided with a heat insulating material such as BT.

By interposing a heat insulating material such as PBT between the ground terminal 13 and the bolt 14, the amount of heat transferred from the mounting bolt to the ground terminal can be reduced and the temperature rise to the ground terminal can be reduced.

When the mounting bolt 14 is made of stainless steel, the amount of heat transferred from the mounting bolt can be reduced and the temperature rise of the ground terminal can be reduced.

The screw hole portion 2a of the bracket 2 reduces the contact area with the screw hole convex portion 13b of the ground terminal 13 to reduce the amount of heat transferred from the bracket to the ground terminal and reduce the temperature rise of the ground terminal. .

[0016]

As described above, according to the present invention, an electric element and a compression element are provided in a closed container, and a heat insulating material such as PBT is interposed between the ground terminal of the closed container and the bolt, so that the mounting bolt is grounded. The heat transferred to the terminal can be reduced and the temperature rise of the earth terminal can be reduced.

When the mounting bolt is made of stainless steel, the amount of heat transferred from the mounting bolt can be reduced and the temperature rise of the ground terminal can be reduced.

By reducing the contact area between the convex portion of the ground terminal and the bracket, the amount of heat transferred from the bracket to the ground terminal can be reduced and the temperature rise of the ground terminal can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a hermetic compressor according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a conventional hermetic compressor.

[Explanation of symbols]

 1 Airtight container 2 Bracket 2a Bracket screw hole 13 Ground terminal 13a Ground terminal screw hole 13b Ground terminal screw hole Convex portion 14 Bolt 15 Heat insulating material such as PBT 15b Screw hole of heat insulating material such as PBT

Claims (3)

[Claims] 1. A hermetically sealed compressor having an earth terminal externally attached to the hermetic compressor and a mounting bolt, wherein a heat insulating material such as PBT is interposed between the earth terminal and the bolt. Compressor. 2. A hermetic compressor having an earth terminal externally attached and a mounting bolt, the bolt being made of stainless steel having a low thermal conductivity.
The hermetic compressor described. 3. A hermetic compressor having an earth terminal externally attached to the hermetic compressor, a convex portion formed on the earth terminal, and a mounting bolt, wherein a contact area between the convex portion of the earth terminal and the bracket is reduced to reduce heat. A hermetic compressor characterized by reduced conduction.