KR19980056681U - Cylinder structure of hermetic rotary compressor - Google Patents

Abstract

The present invention relates to a cylinder structure of a hermetic rotary compressor, and in particular, in order to reduce pressure pulsation in the suction space generated when refrigerant is introduced into the compressor and to be extruded, and to prevent the leakage of the refrigerant, the inner peripheral surface of the cylinder (7) The inlet port 15a is formed on the upper surface thereof, and the recess 7 is formed to be sealed on the inner circumferential surface of the cylinder 7 within a rotation angle of about 180 °. The pressure pulsation is alleviated by the recess groove 18 formed in the inner circumferential surface, and the rolling piston 8 is completely enclosed while contacting the recess groove 18 so that no leakage of the compressed refrigerant occurs, thereby increasing the efficiency of the compressor. It relates to a cylinder structure of the hermetic rotary compressor to maximize the.

Description

Cylinder structure of hermetic rotary compressor

The present invention relates to a cylinder structure of a hermetic rotary compressor, and more particularly, to a cylinder structure of a hermetic rotary compressor which can reduce pressure pulsation in a suction space generated when a refrigerant is introduced into the compressor and is compressed.

As shown in FIG. 1, a general hermetic rotary compressor includes a hermetically sealed container 1 forming an outer case, and includes an inner upper stator 2 and a rotor 3 of the hermetically sealed container 1. The mechanism part is provided, and the upper and lower bearings (5) and lower bearings (5) and the lower part of the rotating shaft (4) and the lower end of the rotating shaft (4) is fixed to the inner diameter of the rotor (3) inside the lower container (1) 6 and the rolling piston 8 which rotates while contacting the inner diameter of the cylinder 7 and the rolling piston 8 which are always in contact with the rolling piston 8 as shown in FIG. 7) The compression mechanism is formed by the vane 17 and the like to serve as a separating plate of high pressure and low pressure inside.

In addition, an upper portion of the hermetic container 1 is formed with a discharge tube 9 through which the high-pressure refrigerant gas formed in the hermetic container 1 is discharged, and a lower portion of the hermetic container 1 is injected into the inside to lubricate and In addition to cooling, oil is circulated in the refrigerating cycle, and the oil and refrigerant mixed in the refrigerant are accumulated in the lower part of the sealed container 1 before the refrigerant discharged from the evaporator during the refrigerating cycle flows into the compressor. The accumulator 10 which isolate | separates and installs is provided.

In the hermetic rotary compressor, the refrigerant flowing out of the accumulator 10 flows into the compression mechanism and is compressed and discharged as a high temperature and high pressure refrigerant gas, and the discharged refrigerant gas is discharged to an upper portion of the sealed container 1. Discharged through (9).

That is, in the hermetic rotary compressor, the refrigerant gas introduced through the accumulator 10 is sucked into the inner space of the cylinder 7 through the suction pipe 15 to rotate the rolling piston 8 and the spring 17a. After being compressed and sealed by the reciprocating motion of the vanes 17 supported by the vanes 17, the refrigerant is discharged into the compressor through the discharge port 14 of the upper bearing 5 or the lower bearing 6, and the refrigerant is stator 2. ) And through the gap between the rotor (3) or between the inner wall and the stator (2) of the sealed container (1) is discharged to the refrigeration cycle apparatus through the discharge pipe (9).

At this time, a significant pressure difference is generated between the suction space (low pressure side) and the discharge space (high compression) that are divided and cut around the vane 17 in the inner space of the cylinder 7.

Meanwhile, as shown in FIG. 2, the conventional cylinder 7 has a suction port 15a communicating with the suction pipe 15 on the inner circumferential surface of the cylinder 7, and closes the cylinder along the cylindrical direction. (7) It has a structure in which the recessed groove 18 for pressure pulsation reduction opened up and down was formed.

According to the conventional cylinder 7 structure as described above, the rolling piston 8 is formed on the inner circumferential surface of the cylinder 7 while the refrigerant is sucked into the cylinder 7 via the accumulator 10 and compressed. The outer circumferential surface is rotated while contacting, and at this time, a considerable amount of refrigerant leaks through both ends of the recessed grooves 18 on the inner circumferential surface of the cylinder 7, thereby lowering the compression efficiency.

The present invention has been devised to solve the above problems, and maximizes the compression efficiency and prevents pressure pulsation in the suction space by preventing the leakage of the suction refrigerant when the refrigerant is introduced into the compressor and compressed. The purpose is to provide a cylinder structure of a hermetic rotary compressor.

1 is a longitudinal sectional view showing a cylinder structure of a general hermetic rotary compressor;

2 is a partial perspective view showing the structure of a cylinder inner peripheral surface according to the prior art,

3 is a perspective view showing a rolling piston according to the prior art,

Figure 4 is a plan view showing a cylinder structure of the hermetic rotary compressor according to the present invention,

Figure 5 is a partial perspective view showing the structure of the cylinder inner peripheral surface according to the present invention.

Explanation of symbols on the main parts of the drawings

7: cylinder 8: rolling piston

10: accumulator 14: discharge port

15 suction tube 16: vane slot

16a: vane slot face 17: vane

17a: spring 18: recessed groove

In the cylinder structure of the hermetic rotary compressor according to the present invention for achieving the above object, the inlet is formed on the inner circumferential surface of the cylinder, and the concave groove is sealable on the inner circumferential surface of the cylinder within 180 ° of rotation angle. It is characterized in that formed.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figures 1 and 4 and 5, the cylinder structure of the hermetic rotary compressor according to the present invention is a rotary shaft (4) press-fit fixed to the inner diameter of the rotor (3) in the inner lower portion of the hermetic container (1) And a rolling piston (8) rotating while contacting the inner diameter of the cylinder (7) and the cylinder (7) having the upper and lower bearings (5) and the lower bearing (6) coupled to the lower portion of the rotary shaft (4), and It consists of the vane 17 etc. which serve as the separating plate of the high pressure and the low pressure inside the cylinder 7, always in contact with the rolling piston 8. As shown in FIG.

At this time, the vane 17 is accommodated in the vane slot 16 and guided along the vane slot surface 16a, and one end of the vane 17 is elastically supported by the spring 17a, and the cylinder ( The suction port 15a communicating with the suction pipe 15 is formed on the inner circumferential surface of 7), and the concave inlet groove 18 is formed in the center of the inner circumferential surface of the cylinder 7 within a rotation angle of 180 °. It is.

Referring to the operation of the present invention having a structure as described above are as follows.

In the hermetic rotary compressor according to the present invention, the refrigerant gas introduced through the accumulator 10 is sucked into the inner space A of the cylinder 7 through the suction pipe 15 to rotate the rolling piston 8 and the spring 17a. After being compressed by the reciprocating motion of the vanes 17 supported by), it is sealed in the space B part and then discharged into the compressor through the discharge port 14 of the upper bearing 5 or the lower bearing 6. The refrigerant is moved to the upper part of the compressor through the gap between the stator (2) and the rotor (3) or between the inner wall of the sealed container (1) and the stator (2) and is discharged through the discharge pipe (9) to the refrigeration cycle apparatus. .

As the rolling piston 8 rotates while being in contact with the inner circumferential surface of the cylinder 7, the indentation groove 18 formed in the inner circumferential surface of the cylinder 7 in the A space portion is gradually compressed when the incompressible refrigerant in the A space portion is gradually compressed. The pressure pulsation is alleviated by a predetermined space in the inside, and the concave inlet groove 18 is closed while the rolling piston 8 abuts to prevent leakage of the compressed refrigerant.

Effects of the present invention that can be expected by the configuration and action as described above are as follows.

In the cylinder structure of the hermetic rotary compressor according to the present invention, the pressure pulsation is alleviated by the recess groove 18 formed in the inner circumferential surface of the cylinder 7 of the low pressure side space portion, and the rolling piston 8 is inserted into the recess groove 18. As it is completely sealed while contacting, leakage of compressed refrigerant does not occur, thereby maximizing the efficiency of the compressor.

Claims (1)

A rotary shaft press-fitted to the rotor inner diameter in the sealed container, a cylinder body coupled to the rotary shaft tip, a vane elastically supported in a vane slot formed in the cylinder body and projecting onto an inner circumferential surface of the cylinder body, A suction port is formed on the inner circumferential surface of the cylinder body of the compression mechanism, which is composed of a rolling piston fixed to the rotating shaft so as to rotate close to the inner circumferential surface, and closes to the inner circumferential surface of the cylinder body within 180 ° of rotation angle. Cylinder structure of the hermetic rotary compressor, characterized in that the groove is formed possible.