KR200149018Y1 - High lubricating close case structure of compressor - Google Patents

Abstract

The present invention relates to a high lubrication hermetic case structure for a hermetic compressor of a refrigerator.

According to the present invention, the cooling oil (L) in the lower portion of the closed case (11) is slid by the bushing part (17a) of the frame (17), the cylinder (13), and the like through a screw pump action through the spiral groove (12a) of the shaft (12). A hermetic compressor of a refrigerator supplied to a moving part, comprising: a first blocking plate (21) installed in a semicircular shape while surrounding a lower end portion of a shaft (12) at an inner lower end of the hermetic case (11); The first blocking plate 21 has a curved surface concentric with the first case is fixed to the side of the closed case 11, the upper lower end is formed of a waveform (22b) and the plurality of through holes 22a as a whole is uniformly distributed 2 includes a blocking plate (22).

Accordingly, the present invention has an effect of smoothing the lubrication of the shaft connecting the high pressure generating part and the motor part by installing a plate to block the turning of the refrigeration oil in the sealed case in the sealed compressor of the refrigerator.

Description

High Lubrication Sealed Case Structure for Compressor

The present invention relates to a compressor, and more particularly, for a compressor for smoothly lubricating a shaft connecting a high pressure generating part and a motor part in a hermetic compressor of a refrigerator having a means for sucking and discharging a refrigerant in a sealed case. A high lubrication sealed case structure.

In a refrigerator, a compressor is a means for converting rotational force due to electrical energy into mechanical energy of reciprocating motion, and a refrigerant having a low boiling point is brought to a high pressure of about 12 atm as it passes through the compressor. Again, the high pressure refrigerant is cooled in the condenser to become liquid, and once this liquid refrigerant is gasified in the cooler, one refrigeration cycle is completed.

1 is a schematic view showing the inside of a hermetic compressor.

The compressor 10 for a refrigerator has a structure in which a suction pipe (not shown) and a discharge pipe (not shown) of a refrigerant are bonded to the outside of the sealed case 11 and a high pressure generator and a motor part are mounted therein. The high-pressure generating portion composed of the cylinder 13, the piston 14, the valve 15, and the like is connected to the motor portion of the stator rotor 18 and the shaft 12.

The cylinder 13, the piston 14, the valve 15, the discharge muffler 16 and the like are formed as an integral assembly and supported on the frame 17. As shown in FIG. The frame 17 also has a bushing portion 17a which rotatably supports the shaft 12 on which the rotor 19 is mounted and also serves as a sliding bearing.

In operation, the shaft 12 rotated by the motor induces the cam motion of the eccentric cam on its upper part, which in turn reciprocates the piston 14 in the cylinder 13 through the connecting rod, 15) is passively opened and closed by the pressure difference between both sides formed at this time to move the refrigerant in one direction.

In the compressor 10 having such a configuration, the mechanical frictional loss is closely related to the compressor efficiency, and thus requires proper lubrication on the rotary contact. The bushing 17a of the shaft 12 and the frame 17 and the cylinder 13 In the sliding parts such as the piston 14 and the high lubrication is required.

The oil supply method applied to the sliding part is various, but the conventional compressor 10 has a screw oil supply method of making a spiral groove 12a on the outer circumferential surface of the shaft 12 and lubricating it with a kind of screw pump action according to the rotation of the shaft 12. Apply.

In the compressor 10 employing the screw lubrication method, when the refrigerant oil L, which performs a lubrication function at a predetermined height, is filled in the sealed case 11 and one end of the spiral groove 12a is immersed in the refrigerant oil, the shaft ( Refrigerating oil rises by the rotation of 12) to lubricate the bushing part 17a, discharged to the upper part of the shaft 12, lubricating the cylinder 13, and then slipping back to the sealed case 11, and thus sliding friction resistance. Reduce the loss

At this time, since the freezing oil L also rotates in the same direction due to the high speed rotation of the shaft 12, the oil level of the freezing oil L changes differently from the initial state in which the shaft 12 is stopped. Since the bottom surface of the sealed case 11 filled with the refrigeration oil (L) is not even, the oil surface of the refrigeration oil (L) is not inclined at a constant rate of change, but is generally lowered in the center and higher in the surroundings.

As the refrigeration oil (L) is lowered in the center part and pivots in the same direction as the shaft 12, the screw pump action of the shaft 12 having the spiral grooves 12a is not smooth, so that the parts due to the increased sliding frictional resistance There is a problem that leads to reduced durability and reduced compressor efficiency.

Accordingly, the present invention is to solve the above problems, in the hermetic compressor of the refrigerator having a means for sucking and discharging the refrigerant in the sealed case for a compressor for smoothly lubricating the shaft connecting the high pressure generating portion and the motor portion. It is an object to provide a lubricated sealed case structure.

1 is a schematic view showing the inside of a hermetic compressor.

2 is a plan view showing a sealed case according to the present invention with a partial detail.

* Explanation of symbols for main parts of the drawings

10 compressor 11 sealed case

12: shaft 12: spiral groove

13: cylinder 14: piston

15 valve 16 discharge muffler

17 frame 17a bushing

18: Stator Rotor 19: Stopper

21: first blocking plate 21a: gap

22: second blocking plate 22a: through hole

22b: waveform L: frozen oil

In order to achieve this purpose, the present invention is a screw pump action through the spiral groove 12a of the shaft 12 to the refrigeration oil (L) of the lower case 11, the bushing portion (17a) of the frame 17, In a hermetic compressor of a refrigerator supplied to a sliding part such as a cylinder (13): a first blocking plate (10) which is divided and installed in a semicircular shape while surrounding a lower end of a shaft (12) at an inner lower end of the sealed case (11). 21); It has a curved surface concentric with the first blocking plate 21 and is fixed to the side of the sealing case 11, the upper lower end is formed in a waveform (22b) is a plurality of through holes 22a as a whole is uniformly distributed It provides a high lubrication sealed case structure for a compressor, characterized in that it comprises a second blocking plate (22).

At this time, the first blocking plate 21 is fixed to be spaced apart by the same distance in the opposite direction with respect to the shaft 12 to form a predetermined gap (21a) on both sides.

EXAMPLE

Hereinafter, with reference to the accompanying Figure 2 will be described a preferred embodiment of the present invention.

2 is a plan view showing a sealed case according to the present invention with a partial detail, the reference numerals refer to FIG.

According to the present invention, the freezing oil (L) of the lower portion of the closed case (11) is slid by the bushing part (17a) of the frame (17), the cylinder (13), and the like through a screw pump action through the spiral groove (12a) of the shaft (12). It applies to the hermetic compressor of the refrigerator supplied to a movement part, The main point is to provide the 1st blocking plate 21 and the 2nd blocking plate 22 in the sealed case 11.

The sealed case 11 is a structure in which the upper case and the lower case are bonded to each other while maintaining airtightness, and the present invention is filled with a refrigeration oil (L) (FIG. 1) to seal the lower part of the pumping operation by the shaft 12. Applied to case 11. At this time, the first blocking plate 21 of the present invention is installed in a semi-circular shape while wrapping the lower end of the shaft 12 in the inner lower end of the sealed case (11).

The first blocking plate 21 serves to prevent sagging of the shaft 12 during transportation of the compressor, like the conventional stopper 19, and separately welds and fixes two parts divided into semicircles.

At this time, the first blocking plate 21 is fixed to be spaced apart by the same distance in the opposite direction about the shaft 12 so as to form a predetermined gap 21a on both sides.

Accordingly, the refrigeration oil (L) inside the first blocking plate 21 is smoothly agitated with the external refrigeration oil (L) in accordance with the flattening operation by the lower end of the shaft 12, so that the high temperature does not deteriorate the lubrication performance. can do.

In addition, the second blocking plate 22 of the present invention has a curved surface concentric with the first blocking plate 21 and is fixed to the side surface of the sealed case 11, while the upper lower end is formed into a waveform (22b) A plurality of through holes 22a are uniformly distributed by volume.

The second blocking plate 22 is composed of a semicircle portion at the center and a straight portion at both sides when viewed in a plan view, so that the center of the radius of curvature of the semicircle portion coincides with the rotation center of the shaft 12 and fixed by welding. Since the airtightness of the sealed case 11 and the 2nd blocking plate 22 is not important, intermittent welding is also possible.

The corrugations 22b and the through holes 22a are sized to form a flow resistance that can delay the flow speed while allowing the refrigerant oil L to move. The waveform 22b makes the difference between the high and low parts about 10-20 mm, and the through hole 22a makes the diameter about 5-10 mm.

In operation of the compressor having such a configuration, the rotation of the shaft 12 rotates the refrigeration oil L to some extent, but the range thereof is narrow, and the flow resistance by the first blocking plate 21 and the second blocking plate 22 is reduced. Since the difference between the liquid level of the refrigeration oil (L) as in the prior art is not severe. This improves the screw pump action through the spiral groove 12a of the shaft 12.

In addition, although the refrigerant is dissolved in the refrigeration oil L to some extent in the sealed case 11 of the hermetic compressor, the refrigerant is impinged while the refrigerant L collides with the through hole 22a of the second blocking plate 22. The separation improves lubricity.

On the other hand, the present invention has been shown and described with respect to the application to the refrigerator compressor, it can be easily applied where a motor-driven compressor such as air conditioner is used.

As described above, the high lubrication sealed case structure of the compressor of the present invention has a high-pressure generator and a motor by installing a plate to block the turning of the refrigeration oil in the sealed compressor of the refrigerator having a means for sucking and discharging the refrigerant inside the sealed case. There is an effect to smooth the lubrication of the shaft connecting the parts.

Although the present invention has been illustrated and described in connection with certain preferred embodiments, the present invention may be variously modified and changed without departing from the spirit or the field of the present invention provided by the following utility model registration claims. It will be readily apparent to one of ordinary skill in the art that it can be used.

Claims (2)

By supplying the screw pump through the spiral groove 12a of the shaft 12, the refrigeration oil L in the bottom of the sealed case 11 is supplied to the sliding parts of the bushing part 17a of the frame 17, the cylinder 13, and the like. A hermetic compressor of a refrigerator comprising: a first blocking plate (21) installed in a semicircular shape while surrounding a lower end of a shaft (12) at an inner lower end of the sealed case (11); A second surface having a curved surface concentric with the first blocking plate 21 and fixed to a side surface of the sealed case 11, and having a plurality of through holes 22a uniformly distributed thereon as the upper and lower ends are formed in a waveform 22b. Compressor high lubrication case structure, characterized in that it comprises a blocking plate (22). The compressor of claim 1, wherein the first blocking plate 21 is fixed to be spaced apart from each other by the same distance in opposite directions about the shaft 12 so as to form a predetermined gap 21a on both sides. Highly lubricated sealed case structure.