KR19980056201U - Cylinder structure of hermetic rotary compressor - Google Patents

Abstract

The present invention relates to a cylinder structure of a hermetic rotary compressor, in particular, when the refrigerant flowing into the compressor is a high-pressure, to prevent abnormal wear occurring in the vane slot surface (16a) to prevent the refrigerant from leaking during the refrigerant compression process The wear-resistant member 18 is coupled to the vane slot surface 16a of the cylinder 7 constituting the compression mechanism of the hermetic rotary compressor using high pressure refrigerant, and the differential pressure between suction discharges at the compression mechanism is 1.6 when using the existing refrigerant. Even if the high pressure refrigerant generated twice or more is applied, the abnormal wear does not occur on the vane slot surface 16a of the cylinder 7, thereby preventing the leakage of the refrigerant during the compression of the high pressure refrigerant to improve the compression efficiency. To a cylinder structure of a hermetic rotary compressor.

Description

Cylinder structure of hermetic rotary compressor

The present invention relates to a cylinder structure of a hermetic rotary compressor. Especially, when the refrigerant flowing into the compressor is high-pressure, it prevents abnormal wear occurring on the vane slot surface, thereby improving the compression efficiency by preventing the refrigerant from leaking during the refrigerant compression process. It relates to a cylinder structure of the hermetic rotary compressor.

Generally, a hermetic rotary compressor has a hermetic container 1 forming an outer case, as shown in FIG. 5, and is composed of a stator 2 and a rotor 3 on the inner side of the hermetic container 1. The electric mechanism unit is installed, and the upper shaft (5) and the lower portion of the rotating shaft (4) and the lower portion of the rotating shaft (4) is fixed to the inner diameter of the rotor (3) in the inner lower portion of the sealed container (1) A cylinder 7 having a bearing 6 coupled to a bowl and a rolling piston 8 rotating while contacting the inner diameter of the cylinder 7 and a high pressure inside the cylinder 7 while always in contact with the rolling piston 8 Compressor spheres composed of vanes 17 and the like serving as a separating plate of underpressure are formed.

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 circulating in the refrigeration cycle is filled, and the oil and refrigerant mixed in the refrigerant are accumulated at the lower side of the sealed container 1 before the refrigerant, which is considered by the evaporator during the refrigeration cycle, is introduced into the compressor. The accumulator 10 which isolate | separates and installs is provided.

In the hermetic rotary compressor as described above, 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 in an upper portion of the sealed container 1. Discharged through (9).

That is, in the hermetic rotary compressor, as illustrated in FIG. 6, the refrigerant gas introduced through the accumulator 10 is sucked into the inner space A portion of the cylinder 7 through the suction pipe 15, thereby rolling the piston 8. And the air discharge port 14 of the upper bearing 5 or the lower bearing 6 after being sealed by the rotation B and the reciprocating motion of the vane 17 supported by the spring 17a and closed in the space B part. The refrigerant is discharged into the compressor, and the refrigerant moves to the upper portion of the compressor through a gap between the stator 2 and the rotor 3 or between the inner wall of the sealed container 1 and the stator 2 so that the discharge tube 9 Is discharged to the refrigeration cycle apparatus.

At this time, a considerable pressure difference is generated between the portion A (low pressure side), which is the suction space divided and blocked around the vane 17, among the inner spaces of the cylinder 7, and the portion B (high pressure side), which is the discharge space.

Furthermore, according to the conventional cylinder 7 structure as described above, when the high-pressure refrigerant R410A or R410B is applied, the differential pressure is generated by 1.6 times or more of the conventional refrigerant R22, the abnormal wear of the cylinder vane slot surface 16a In this case, a gap is generated between the vanes 17 and the vane slots 16 due to such abnormal abrasion, thereby reducing the compression efficiency due to leakage of refrigerant gas from the compression mechanism during compression.

Therefore, the present invention was devised to solve the above problems, and when the refrigerant flowing into the compressor is high-pressure, it prevents abnormal wear occurring on the vane slot surface to prevent the refrigerant from leaking in the refrigerant compression process. It is an object of the present invention to provide a cylinder structure of a hermetic rotary compressor having improved efficiency.

1 is a plan view showing a cylinder structure of a hermetic rotary compressor according to the present invention;

2 is an enlarged view showing some of the vane slots of the cylinder according to the present invention;

3 is a perspective view of the wear-resistant member attached to the vane slot surface of the present invention,

4 is a front view of the wear resistant member according to the present invention;

Figure 5 is a longitudinal sectional view showing the overall structure of a general hermetic rotary compressor,

6 is a plan view showing a cylinder structure of a hermetic rotary compressor according to the prior art.

* Description of the symbols for 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: wear-resistant member

18a: through hole

Cylinder structure of the hermetic rotary compressor according to the present invention for achieving the above object is characterized in that the wear-resistant member is coupled to the vane slot surface of the cylinder constituting the compression mechanism of the hermetic rotary compressor using a high-pressure refrigerant.

In addition, the wear-resistant member is lubricated surface treatment so that the operation of the cylinder can be made smoothly, at least one body diameter through-hole is formed to be coupled to the vane slot surface.

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

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

At this time, the vane 17 is accommodated in the vane slot 16 and guided along the vane slot surface 17a, and one end of the vane 17 is elastically supported by the spring 17a. The wear resistant member 18 is attached to the slot surface 17a.

One or more through holes 18a are formed in the wear resistant member 18 so that they can be fixed on the vane slot surface 17a using fastening nails or the like. Preferably, one surface of the wear resistant member 18 in contact with the vanes 17 is processed to lubricate the cylinder 7 so that the operation of the cylinder 7 may be smoothly performed.

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 through-hole 18a introduced through the accumulator 10 is sucked into the inner space A portion of the cylinder 7 through the suction pipe 15 to rotate the rolling piston 8, After being compressed by the reciprocating motion of the vanes 17 supported by the spring 17a, 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 sealed container (1) inner wall and the stator (2) through the discharge pipe (9) Is discharged.

At this time, as the rolling piston 8 rotates, the vane 17 having one end contacting the outer circumferential surface of the rolling piston 8 is attached to the vane slot surface 16a while reciprocating in the vane slot 16. Since the surface of the wear resistant member 18 is rubbed, the vane slot surface 16a is protected by the wear resistant member 18, thereby preventing the 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 closed rotary compressor according to the present invention, the cylinder structure has abnormal wear on the vane slot surface 16a of the cylinder 7 even when a high pressure refrigerant having a differential pressure between suction discharges in the compression mechanism is generated 1.6 times or more than a conventional refrigerant is used. By not doing so, leakage of the refrigerant can be prevented at the time of compression of the high-pressure refrigerant, thereby improving the compression efficiency.

Claims (3)

A rotating shaft press-fitted to the rotor inner diameter in the sealed container, a cylinder body coupled to one end of the rotating shaft, a vane elastically supported in a vane slot formed in the cylinder body, and protruding onto an inner circumferential surface of the cylinder body; The cylinder structure of the hermetic rotary compressor, characterized in that the wear-resistant member is coupled to the vane slot surface of the compression mechanism portion consisting of a rolling piston fixed to the rotating shaft so as to rotate close to the inner peripheral surface. The cylinder structure of the hermetic rotary compressor according to claim 1, wherein the wear-resistant member is lubricated surface treated to facilitate the operation of the cylinder. 2. The cylinder structure of a hermetic rotary compressor according to claim 1, wherein the wear resistant member has at least one through hole for fastening to be coupled to the vane slot surface.