JPS6244104B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compressor with improved soundproofing and oil separation structure.

The compressor includes a compression mechanism inside its case, and discharges the refrigerant compressed by the compression mechanism through a discharge valve.In order to prevent noise during discharge, the compressor is equipped with a valve cover. The discharge gas is once discharged into the valve cover.

In addition, in order to prevent lubricating oil from leaking out of a compressor, a gas passage is provided in the rotor that constitutes the electric mechanism, and an oil separation plate is provided on the top of the rotor, so that the refrigerant containing oil is discharged from the discharge valve. By guiding gas to the oil separation plate through the gas passage of the rotor, oil is separated and recovered by centrifugal force.

However, in the past, the discharged refrigerant gas discharged into the valve cover was discharged directly into the compressor case, which resulted in the inconvenience that the valve opening/closing sound and gas noise were strongly transmitted to the compressor case, reducing soundproofing efficiency. Ta. In addition, since a gas passage is provided in the rotor as an oil separation mechanism, the efficiency of the electric motor decreases, and a clearance must be formed between the oil separation plate on the top of the rotor and the motor outlet wire, and the compressor The disadvantage was that the length of the case was large.

The present invention has been made focusing on the above circumstances,
The purpose of this is to prevent the opening/closing sound of the discharge valve and gas noise when discharging refrigerant gas from being transmitted to the compressor case, and to separate the oil without providing a gas passage or oil separation plate in the rotor. The aim is to provide a compressor.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 in the figure is a case of a hermetic compressor, and the upper part of the case 1 has a motor section 2,
A compression mechanism section 3 is provided at the bottom. The electric motor section 2 is composed of a stator 4 and a rotor 5, and the compression mechanism section 3 is composed of a cylinder 6 and a roller 7 that rotates eccentrically within the cylinder 6. The rotor 5 and roller 7 are connected via a shaft 8, and the shaft 8 is rotatably pivoted by main and sub bearings 9 and 10 disposed above and below the cylinder 6. supported. On the other hand, a gas passage 11 is provided along the axial direction on the inside upper side of the shaft 8, and the upper end opening of this gas passage 11 communicates with the upper space A in the compressor case 1.
In addition, oil separation holes 12 are provided in the side wall of the shaft 8.
and an oil discharge hole 13 are bored, and these oil separation hole 12 and oil discharge hole 13 communicate with the gas passage 11. In the middle of the gas passage 11, there is an oil separation plate 15 having a through hole 14 in the center.
is provided. Further, an oil supply hole 16 is provided in the lower part of the shaft 8 along the axial direction, and this oil supply hole 16 communicates with the cylinder 6 and the sub-bearing 10 through communication holes 17 and 18. Further, the main bearing 9 is provided with a discharge valve 19 that communicates with the inside of the cylinder 6, and furthermore, a valve cover 2 is provided on the upper surface of the main bearing 9.
0 is set. The valve cover 20 forms an airtight space B above the main bearing 9. This space B is connected to the gas passage 1 of the shaft 8 through the communication hole 21 provided in the main bearing 9 and the oil separation hole 12 mentioned above.
1. Further, lubricating oil 22 is housed in the inner bottom of the compressor case 1, and further,
A discharge pipe 23 is connected to the upper surface of the compressor case 1 .

However, in the above-described configuration, the electric motor section 2
When the rotor 5 is rotated, the roller 7 of the compression mechanism 3 is rotated via the shaft 8, and refrigerant gas is sucked into the cylinder 6 via a suction pipe (not shown), and the lubricating oil 22 is introduced into the oil supply hole 16. A part of it is supplied to the sub-bearing 10 through the communication hole 18, and the other part is supplied into the cylinder 6 through the communication hole 17. The mixture of lubricating oil 22 and refrigerant gas supplied into the cylinder 6 is compressed by the roller 7 and discharged into the valve cover 20 via the discharge valve 19. Thereafter, this mixture flows into the gas passage 11 through the communication hole 21 and the oil separation hole 12, but when the gas refrigerant passes through the oil separation hole 12, it is contained in the gas refrigerant and the lubricating oil becomes large. The parts are separated and fed to the main bearing 9. On the other hand, the gas refrigerant sent into the gas passage 11 rises, and on the way there, the lubricating oil is further separated by the oil separation plate 15 and discharged into the compressor case 1 through the oil discharge port 13. The gas refrigerant from which the oil has been separated in this manner further rises and flows out from the upper surface opening of the gas passage 11, and then is discharged from the discharge pipe 23.

As described above, in order to introduce the gas refrigerant discharged from the discharge valve 19 into the gas passage 11 in the shaft 8 from the valve cover 20, the valve Opening/closing sounds and gas sounds are not transmitted to the compressor case 1.

In addition, since the oil in the gas refrigerant is separated in the gas passage 11 of the shaft 8, the flow direction of the gas refrigerant and oil is different and the amount of oil discharged is reduced. becomes possible.

Note that the present invention is not limited to the above-mentioned embodiment, but as shown in FIGS. 3 to 5, the oil separators 23, 24, and 25 may be formed into tubular bodies to reduce noise. Good too.

As explained above, the present invention provides a gas passage along the longitudinal direction inside the drive shaft that drives the compression mechanism section, and communicates this gas passage with the valve cover through the oil separation hole. Refrigerant gas discharged into the cover is introduced into the gas passage through the communication hole. Therefore, unlike the conventional case where the gas is directly discharged from the valve cover into the compressor case, the valve opening/closing sound and gas noise are not strongly transmitted to the compressor case, and noise can be significantly reduced. In addition, since an oil separator is provided in the gas passage and the oil in the discharged refrigerant gas is separated by the oil separator and the oil separation hole, it is necessary to provide a gas passage and an oil separation plate in the rotor as in the conventional case. This has the effect that the rotational efficiency of the motor is improved, the length of the compressor case is reduced, weight and cost can be reduced, and the amount of oil discharged can be reduced.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view showing a hermetic compressor;
FIG. 2 is a longitudinal sectional view showing an oil separator, and FIGS. 3 to 5 are longitudinal sectional views showing first to third other embodiments of the oil separator. 1... Compressor case, 2... Compression mechanism section, 19
...Discharge valve, 8...Drive shaft, 11...Gas passage, 12...Oil separation hole, 13...Oil discharge hole, 2
0... Valve cover, 15... Oil separator.

Claims (1)

[Claims] 1 A compressor case, a compression mechanism section provided in the compressor case, a discharge valve provided in the compression mechanism section, a drive shaft for driving the compression mechanism section, and a longitudinal section of the drive shaft disposed within the drive shaft. a gas passage provided along the direction; an oil separation hole and an oil discharge hole provided in a side wall of the drive shaft and communicating with the gas passage; and a connection between the discharge valve and the gas passage through the oil separation hole. comprising a valve cover that communicates with the oil separator and an oil separator provided in the gas passage, and the oil in the compressed refrigerant gas discharged from the discharge valve is separated by the oil separation hole and the oil separator. A compressor featuring: