KR19980057188U - Hermetic Rotary Compressor - Google Patents

Abstract

The present invention provides a casing, a suction pipe into which the refrigerant to be compressed flows, a rotary compression unit for compressing the refrigerant introduced from the suction pipe, a drive unit for driving the compression unit, and a refrigerant compressed by the compression unit to the outside of the casing. An airtight rotary compressor having a discharge tube for discharging air to a discharge chamber is provided, and an oil trap plate having a plurality of refrigerant flow holes formed therein is provided in a flow path of a compressed refrigerant between the compression unit and the discharge pipe. Thereby, the hermetic rotary compressor which can prevent the oil in a compressor from leaking into a refrigeration cycle is provided.

Description

Hermetic Rotary Compressor

The present invention relates to a hermetic rotary compressor, and more particularly to a hermetic rotary compressor to prevent oil from flowing out through the discharge pipe together with the refrigerant.

The rotary compressor serves to compress the refrigerant at high temperature and high pressure in various air conditioners for cooling and freezing purposes. As shown in FIG. 3, the rotary compressor is provided with an accumulator 57 provided with a suction pipe 58 for introducing refrigerant into the side of the casing 51, and is compressed at a high temperature and high pressure in the upper portion of the casing 51. A discharge pipe 59 through which the coolant is discharged is provided. On the other hand, in the casing 51 of the rotary compressor, a rotary compression unit 70 for compressing a refrigerant and a driving unit 60 for driving the compression unit 70 are provided.

The drive unit 60 includes a stator 54 having a coil wound around the core, a rotor 55 accommodated in the stator 54 and rotated by a magnetic field, and a rotor 55 press-fitted into the rotor 55. It is composed of a rotary shaft 56 that rotates integrally, and an oil pick-up vane 68 is mounted inside the lower side of the rotary shaft 56 so that oil can be fed upward from the oil receiving portion 71 in the casing 51. . The compression unit 70 includes an eccentric shaft 61 formed by eccentric lower portion of the rotating shaft 56, a roller 62 rotating around the eccentric shaft 61, and a cylinder in which the roller 62 is in rolling contact. And a top flange 64 and a bottom flange 66 which respectively block the upper and lower openings of the cylinder 63. In the cylinder 63, vanes (not shown) which partition the compressed space in the cylinder 63 are installed to reciprocate in the radial direction of the cylinder 63, and discharge the suction port 65 through which the refrigerant is sucked and the compressed refrigerant. The discharge port which is not shown in figure is provided.

In the rotary compressor, when a power is applied, a magnetic field is formed by a coil wound around the stator 54, and the rotor 55 and the rotation shaft 56 rotate by the magnetic field. When the rotation shaft 56 rotates, the eccentric shaft 61 integrally formed with the rotation shaft 56 is rotated below the rotation shaft 56, so that the rollers 62 surrounding the eccentric shaft 61 are vanes and one side. This contact causes rolling contact and rotation along the inner wall of the cylinder 63 to compress the refrigerant sucked through the suction port 65. The compressed refrigerant is discharged into the compressor through the discharge port of the cylinder 63 and then discharged into the freezing cycle through the discharge tube 59.

When the rotary compressor is driven in this way, frictional heat and abrasion occur due to the rolling contact between the vanes and the rollers 62 in the cylinder 63. Accordingly, oil is supplied to the vanes and other frictional portions, for example, the top flange 64, the bottom flange 66, and the roller 62, to cool and lubricate the oil. The oil is rotated by the rotation of the rotary shaft 56. (56) It is fed upward by the rotation of the oil pick-up vane 68 mounted on the lower part and supplied to each friction part to perform a lubricating function, and then it is scattered in the casing 51 by the centrifugal force of the rotating shaft 56, Return to the oil receiving part 71.

By the way, the oil scattered in the casing 51, when the refrigerant compressed at a high temperature and high pressure flows toward the discharge tube 59 is piggybacked upwardly and discharged together with the refrigerant through the discharge tube 59. Therefore, the amount of oil in the compressor is reduced, cooling and lubrication efficiency is reduced, there is a problem that the efficiency of the freezing cycle is lowered as the discharged oil remains in the freezing cycle.

Accordingly, an object of the present invention is to provide an enclosed rotary compressor having improved efficiency by preventing oil from leaking into a freezing cycle to facilitate smooth cooling and lubrication of frictional parts.

1 is a cross-sectional view of a hermetic rotary compressor with an oil trap plate according to the present invention;

Figure 2 is a perspective view of the oil trap plate according to the present invention,

3 is a cross-sectional view of a conventional hermetic rotary compressor.

Explanation of symbols for main parts of the drawings

1: Casing 1a: Upper Casing Part

1b: Main casing part 1c: Lower casing part

4: stator 5: rotor

6 axis of rotation 7 accumulator

8: suction pipe 9: discharge pipe

10: drive unit 11: eccentric shaft

12: roller 13: cylinder

14: top flange 15: upper bearing portion

16: bottom flange 17: lower bearing

18: oil pick-up vane 19: terminal

20: compression part 21: oil receiving part

22: suction port 30: oil filter plate

31: Refrigerant distribution hole 32: Passing hole

The object is, according to the present invention, a casing, a suction pipe into which the refrigerant to be compressed is introduced, a rotary compression unit for compressing the refrigerant introduced from the suction pipe, a drive unit for driving the compression unit, and a refrigerant compressed in the compression unit. A hermetic rotary compressor having a discharge tube for discharging the gas to the outside of the casing, wherein the oil trap plate having a plurality of refrigerant flow holes formed in the flow path of the compressed refrigerant between the compression unit and the discharge tube is installed. Achieved by a rotary compressor.

Here, the oil trap plate is preferably fixed to the inner wall surface of the casing. The casing is composed of at least two casing portions welded to each other, and the oil trap plate is interposed between the two casing portions to be welded integrally with the two casing portions.

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

1 is a cross-sectional view of a hermetic rotary compressor having an oil trap plate according to the present invention. The rotary compressor includes a compression unit 20 for sucking and compressing a refrigerant in the casing 1 forming an external appearance, and a driving unit 10 for driving the compression unit 20.

The driving unit 10 includes a stator 4 in which a coil is wound around a core to form a magnetic field, a rotor 5 rotatably housed in the stator 4, and a rotor 5 press-fitted to the rotor 5. It consists of a rotating shaft (6) which rotates integrally, the lower side of the rotating shaft (6) is equipped with an oil pick-up vane (18) so as to feed the oil from the oil receiving portion 21 upward, the rotating shaft (6) On the outer surface of the spiral oil grooves are formed to facilitate the upward feeding of the oil.

The compression unit 20 driven by the driving unit 10 includes an eccentric shaft 11 formed by the rotation shaft 6 being eccentric, a roller 12 rotating around the eccentric shaft 11, and a roller 12. It consists of a cylinder 13 in contact with the cloud. In the cylinder 13, a vane (not shown) which is in contact with the side of the roller 12 and reciprocates in the radial direction of the cylinder 13 is installed, and the suction port 22 and the compressed refrigerant which are connected to the external suction pipe 8 are installed. A discharge port, not shown, which flows out into the compressor is formed. The top flange 14 and the bottom flange 16 which block the upper and lower openings are installed in the upper and lower portions of the cylinder 13, and the top flange 14 and the bottom flange 16 are respectively the axis of the rotation shaft 6. The upper bearing portion 15 and the lower bearing portion 17 extending in the direction are formed to rotationally support the rotation shaft 6.

On the other hand, the casing 1 of the rotary compressor, the main casing of the cylindrical shape coupled between the upper casing portion (1a) and the lower casing portion (1c), and the upper casing portion (1a) and the lower casing portion (1c). It consists of the part 1b, and forms an external appearance. On the side of the casing 1, an accumulator 7 provided with a suction pipe 8 through which refrigerant flows is provided, and a discharge tube 9 through which the compressed refrigerant is discharged is discharged in the center upper region of the upper casing portion 1a. It is installed. Each of these casing parts are joined to each other by welding, and between the upper casing part 1a and the main casing part 1b, an oil trap plate 30 in which a plurality of refrigerant flow holes 31 are formed is fitted to weld integrally. It is.

Figure 2 is a perspective view of the oil trap plate according to the present invention. The circular oil trap plate 30 is bent upwardly and then bent radially outward again to form a weld 33. The oil trap plate 30 has a plurality of coolant distribution holes 31 through which coolant flows out at regular intervals, and a power lead wire connected from an external terminal 19 for supplying power to the compressor passes therethrough. The power lead wire through hole 32 is formed to be provided. The oil trap plate 30, the welding portion 33 of the oil trap plate 30 is seated on the upper portion of the main casing portion (1b), and then the upper casing portion (1a) inside the oil trap plate (30). It is fitted, welded and fixed integrally.

By such a configuration, when power is applied to the rotary compressor and a magnetic field is formed by the coil of the stator 4, the rotor 5 and the rotating shaft 6 rotate. When the rotating shaft 6 rotates, the roller 12 surrounding the eccentric shaft 11 formed at the lower portion of the rotating shaft 6 is in rolling contact with the cylinder 13 to compress the refrigerant. At this time, the oil is supplied for cooling and lubricating the friction part generated by the rotation of the rotary shaft 6, that is, the roller 12, the top flange 14, the bottom flange 16 and the vane, etc. It is fed upward by the oil pick-up vane 18 mounted inside the rotating shaft 6 to perform a lubricating function, and then scattered in the casing 1 by the centrifugal force of the rotating shaft 6 to return to the lower oil receiving portion 21. do. By the way, the oil scattered in the casing 1 is piggybacked upward when the refrigerant compressed at high temperature and high pressure flows upward toward the discharge tube 9. The oil piggybacked on the compressed refrigerant rises toward the discharge tube 9 and collides with the oil trap plate 30 provided between the upper casing portion 1a and the main casing portion 1b. When the refrigerant collides with the oil in the oil trap plate 30, the oil is condensed by the oil trap plate 30, falls, and is accommodated in the oil receiving unit 21 again. The compressed refrigerant opens the refrigerant flow hole 31. It is discharged to the freezing cycle through the discharge pipe (9).

In the above-described and illustrated embodiments, the oil trap plate formed with a plurality of coolant distribution holes on the metal plate to prevent the outflow of oil, but the same effect can be obtained even when the oil trap plate is formed of a mesh and installed in the flow path of the refrigerant. Can be.

As described above, according to the present invention, there is provided a hermetic rotary compressor in which oil is prevented from leaking into the refrigeration cycle, thereby improving the cooling and lubrication efficiency and the efficiency of the refrigeration cycle.

Claims (3)

A casing, a suction pipe into which the refrigerant to be compressed flows, a rotary compression unit for compressing the refrigerant introduced from the suction pipe, a driving unit for driving the compression unit, and a discharge for discharging the refrigerant compressed in the compression unit to the outside of the casing In a hermetic rotary compressor having a tube, A sealed rotary compressor, characterized in that an oil trap plate having a plurality of refrigerant flow holes formed in the flow path of the compressed refrigerant between the compression unit and the discharge tube. The method of claim 1, The oil trap plate is a sealed rotary compressor characterized in that the welding fixed to the inner wall surface of the casing. The method of claim 2, The casing is composed of at least two casing portions which are welded to each other, the oil trap plate is interposed between the two casing portions, the hermetic rotary compressor, characterized in that integrally welded with the two casing portions.