JPH09236085A - Enclosed motor-driven compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble a compressor without considering positional dislocation of a cylindrical spring by movably inserting the cylindrical spring into a maximum amplitude position of a delivery pipe so as not to resonate in an operating frequency. SOLUTION: Refrigerant gas delivered from a cylinder 1 flows inside of a delivery pipe 4 through a delivery valve chamber 2 and a delivery noise eliminator 3 by reciprocating motion of a piston 6. This refrigerant gas flows to the high pressure side of a refrigerant cycle connected to a delivery connecting pipe 8 through the delivery connecting pipe 8. Vibration of a compression element 10 is transmitted to a sealed vessel 7 through the delivery pipe 4 and the delivery connecting pipe 8, but is damped by a cylindrical spring 15. At operation time, the cylindrical spring 15 of the delivery pipe 4 freely moves to a maximum amplitude position of the delivery pipe 4 by the action of centrifugal force generated with a connecting part of the compression element, the delivery connecting pipe 8 and the delivery pipe 4 as a fulcrum, and resonance of the delivery pipe 4 in an operating frequency can be avoided. Therefore, an inexpensive and silent compressor can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge connection pipe of a hermetic electric compressor (hereinafter referred to as a compressor) connected to a refrigeration cycle of an electric refrigerator or the like, and a main body of the electric compressor discharged in a hermetic container. The present invention relates to a structure connected by a pipe and having a cylindrical spring inserted in the discharge pipe.

[0002]

2. Description of the Related Art In recent years, there has been a strong demand for noise reduction in electric refrigerators for home use, and there is an urgent need to meet this demand. The main source of noise in household electric refrigerators is the compressor. Therefore, in the compressor, in order to prevent the vibration transmission from the compressor body to the airtight container and the discharge pipe connection port, the discharge pipe is provided with a coil and a cylindrical spring is inserted. As such a hermetic compressor, the one described in JP-A-6-129355 is known.

FIG. 2 shows the structure of a conventional compressor. 10
Is a compression element, 1 is a cylinder, 2 is a discharge valve chamber, 3 is a discharge silencer, and 6 is a piston which reciprocates in the cylinder 1. 7 is a closed container for housing the compression element 10, 8 is a discharge connection pipe attached to the closed container 7 by silver brazing,
Reference numeral 4 denotes a discharge pipe, which connects the discharge silencer 3 of the compression element 10 and the discharge connection pipe 8. A stopper 9 is welded to the discharge pipe 4 by brazing. 5 is a cylindrical spring and is a discharge pipe 4
And is fixed by a stopper 9. The operation of the compressor configured as described above will be described below.

Due to the reciprocating motion of the piston 6, the cylinder 1
The discharged refrigerant gas is discharged from the discharge valve chamber 2 and the discharge silencer 3.
Flows through the inside of the discharge pipe 4. The refrigerant gas flows through the discharge connecting pipe 8 to the high pressure side of the refrigeration cycle connected to the discharge connecting pipe 8. The vibration of the compression element 10 is transmitted to the closed container 7 through the discharge pipe 4 and the discharge connection pipe 8, but is damped by the cylindrical spring 5. The discharge pipe 4 is
The cylindrical spring 5 is fixed at a prescribed position by the stopper 9, so that the cylindrical spring 5 is tuned so as not to resonate.

[0005]

However, in the above-mentioned structure, there is a problem that the number of man-hours for passing the brazing furnace through the brazing furnace for welding the stopper to the discharge pipe is increased, and the generation of dust is increased through such a process. Was there. In addition, the cylindrical spring must be accurately fixed at a prescribed position during assembly, which makes the work difficult. An object of the present invention is to provide an inexpensive and quiet compressor that solves these problems.

[0006]

In order to solve this problem, the present invention is one in which a cylindrical spring is movably inserted in the maximum amplitude position of the discharge pipe so as not to resonate at the operating frequency.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION According to the first aspect of the present invention, a cylindrical spring is movably inserted at the maximum amplitude position of the discharge pipe so that the discharge pipe does not resonate at the operating frequency.
During operation, the cylindrical spring of the discharge pipe moves to the maximum amplitude position by the action of the centrifugal force generated by the microvibration of the discharge pipe during operation of the compressor, with the compression element and the connection between the discharge connecting pipe and the discharge pipe acting as a fulcrum. It has the effect that resonance of the discharge pipe at the frequency can be avoided.

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those of the conventional example will be described using the same reference numerals.

(Embodiment) FIG. 1 is a plan view of a compressor according to an embodiment of the present invention. In FIG. 1, 10 is a compression element, 1 is a cylinder, 2 is a discharge valve chamber, and 3 is a discharge. A silencer 6 is a piston that reciprocates in the cylinder 1. Reference numeral 7 denotes a closed container for housing the compression element 10, 8 denotes a discharge connection pipe attached to the closed container 7 by silver brazing, 4
Is a discharge pipe, which connects the discharge silencer 3 of the compression element 10 and the discharge connection pipe 8. Reference numeral 15 is a cylindrical spring, and the cylindrical spring 15 is movably inserted at the maximum amplitude position of the discharge pipe 4 so that the discharge pipe 4 does not resonate at the operating frequency. The operation of the compressor configured as described above will be described below.

Due to the reciprocating movement of the piston 6, the cylinder 1
The discharged refrigerant gas flows through the discharge valve chamber 2 and the discharge silencer 3 into the discharge pipe 4. The refrigerant gas flows through the discharge connecting pipe 8 to the high pressure side of the refrigeration cycle connected to the discharge connecting pipe 8. The vibration of the compression element 10 is transmitted to the closed container 7 through the discharge pipe 4 and the discharge connection pipe 8,
It is damped by the cylindrical spring 15. During operation, the cylindrical spring 15 of the discharge pipe 4 is acted on by the centrifugal force generated by the microvibration of the discharge pipe 4 during operation of the compressor, with the compression element and the connecting portion of the discharge connecting pipe 8 and the discharge pipe 4 acting as a fulcrum. It is possible to freely move to the maximum amplitude position of 4 and avoid the resonance of the discharge pipe 4 at the operating frequency.

[0011]

As described above, according to the present invention, since the cylindrical spring is movably inserted at the maximum amplitude position of the discharge pipe so as not to resonate at the operating frequency, it is possible to assemble without considering the positional deviation of the cylindrical spring. A workability is easy, and an inexpensive and quiet compressor can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a compressor according to an embodiment of the present invention.

FIG. 2 is a plan view of a conventional compressor

[Explanation of symbols]

 1 Cylinder 2 Discharge valve chamber 3 Discharge silencer 4 Discharge pipe 6 Piston 7 Sealed container 8 Discharge connection pipe 10 Compression element 15 Cylindrical spring

Claims (1)

[Claims] 1. A compressor comprising a compression element and an electric element for driving the compression element in a closed container which communicates with the inside and outside by a discharge connection pipe, wherein the compression element and the discharge connection pipe are connected by the discharge pipe in the closed container. A hermetic electric compressor in which a cylindrical spring is movably inserted at the maximum amplitude position of the discharge pipe so as not to resonate at the operating frequency.