JPH04219480A - Closed electric compressor - Google Patents

Abstract

PURPOSE:To reduce the leakage of refrigerant through weak fastening force by providing a cylinder with a suction lead and a contacting part between a gasket and a head attached through a discharge lead and the gasket with a closed loop projecting part. CONSTITUTION:In a closed electric compressor, a head 6 is fastened to a cylinder 1 by a bolt 7 through a suction lead 2, a plate 3 attached to the side opposite to the cylinder of the suction lead 2, a discharge lead 4 and a gasket 5. In this case, a head 10 is provided with a closed loop-shaped projecting part 11, by which the suction plenum 10a and discharge plenum 10b of the head 10 are severally covered. Thus even when the bolt 7 is fastened by weak force, the projecting part 11 of the head 10 eats into the gasket 5 to reduce the leakage of refrigerant between the head 10 and the gasket 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic electric compressor used in refrigerators, air conditioners, etc.

0002

BACKGROUND OF THE INVENTION In recent years, hermetic electric compressors have become more efficient.

An example of a conventional hermetic electric compressor will be described below with reference to the drawings.

3 and 4 are shown in Japanese Unexamined Patent Application Publication No. 183287/1987, FIG. 3 is an exploded perspective view of the main parts of a conventional hermetic electric compressor, and FIG. 4 is an exploded perspective view of a conventional hermetic electric compressor. FIG. 2 is a perspective view of main parts of the compressor.

In FIGS. 3 and 4, 1 is a cylinder, 2 is a suction lead attached to the cylinder, and 3 is a plate attached to the side of the suction lead 2 opposite to the cylinder.

4 is a discharge lead attached to the side opposite to the suction lead of the plate 3; 5 is a gasket attached to the side opposite to the plate of the discharge lead 4; and 6 is a head attached to the opposite side of the discharge lead of the gasket 5. . 7 is a bolt, 8 is a screw hole provided in the cylinder 1, and 9 is a bore hole provided in the cylinder 1.

The head 6 includes a suction plenum 6a.
A discharge plenum 6b is formed.

The operation of the hermetic electric compressor constructed as described above will be explained below. Suction lead 2
, plate 3, discharge lead 4, gasket 5
, the head 6 is sequentially fixed to the cylinder 1 having a bore hole 9 by tightening bolts 7 into screw holes 8 to prevent refrigerant (not shown) from leaking.

[0009]

However, in the above structure, in order to reduce refrigerant leakage between the discharge plenum 6b of the head 6 and the gasket 5, in which high-pressure refrigerant (not shown) enters, it is necessary to had to be tightened into the screw hole 8 with a strong force, which caused the bore hole 9 to become distorted and reduce efficiency.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a highly efficient hermetic electric compressor in which there is little refrigerant leakage between the head and the gasket, and the distortion of the bore hole is small.

[0011]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the hermetic electric compressor of the present invention is provided with a protrusion forming a closed loop at the contact portion between the head and the gasket.

0012

[Function] With the above-described structure, the present invention can reduce the leakage of refrigerant between the head and the gasket by tightening the bolt into the screw hole with a weak force because the protruding part of the head sinks into the gasket. Because it is tightened into a screw hole, the distortion of the bore hole is small.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hermetic electric compressor according to an embodiment of the present invention will be described below with reference to the drawings, and components that are the same as those of the prior art will be designated by the same reference numerals and detailed explanations thereof will be omitted.

Reference numeral 11 denotes a protrusion provided on the head 10. This protrusion 11 covers each of the suction plenum 10a and the discharge plenum 10b of the head 10 in a closed loop.

With the above configuration, even if the bolts are tightened with a weak force when assembling the hermetic electric compressor,
The protrusion 11 of the head 10 can be inserted into the gasket 5 to reduce leakage of refrigerant between the head 10 and the gasket 5, and the bore hole 9 can be tightened into the screw hole 8 with a weak force.
but the distortion is small.

[0016] Therefore, a highly efficient hermetic electric compressor can be obtained.

[0017]

[Effects of the Invention] As described above, the present invention has a protrusion forming a closed loop at the contact portion between the head and the gasket, so that even if the bolt is tightened with a weak force, the protrusion of the head will not penetrate into the gasket. , the leakage of refrigerant between the head and the gasket can be reduced, and since it is tightened with a weak force, the distortion of the bore hole is small, making it possible to obtain a highly efficient hermetic electric compressor.

[Brief explanation of the drawing]

FIG. 1: An exploded perspective view of essential parts of a hermetic electric compressor according to an embodiment of the present invention.

[Fig. 2] A perspective view of main parts of a hermetic electric compressor according to an embodiment of the present invention.

[Figure 3] An exploded perspective view of the main parts of a conventional hermetic electric compressor

[Figure 4] A perspective view of the main parts of a conventional hermetic electric compressor

[Explanation of symbols]

1 Cylinder 2 Suction lead 3 Plate 4 Discharge lead 5 Gasket 7 Bolt 8 Screw hole 9 Bore hole 10 Head 10a Suction plenum 10b Discharge plenum 11 Projection

Claims (2)

[Claims] 1. A cylinder having a screw hole constituting a compression element; a suction lead disposed in the cylinder;
a plate disposed on the side opposite to the cylinder of the suction lead; a discharge lead disposed on the side opposite to the suction lead of the plate; a gasket disposed on the side opposite to the plate of the discharge lead; and a side of the gasket opposite the discharge lead. a head disposed on the head, the suction lead, the plate, the discharge lead, the gasket, and a bolt passing through the head and fixed to the screw hole of the pre-modified cylinder; A hermetic electric compressor characterized by having a protrusion forming a closed loop at the contact part. 2. The hermetic electric compressor according to claim 1, wherein a suction plenum and a discharge plenum are formed in the head, and each plenum has a protrusion forming a closed loop around the outer periphery of the plenum.