JPS61241485A - Rotary compressor - Google Patents

Abstract

PURPOSE:To achieve the minimization of discharge quantity of oil in a container by communicating a muffler chamber with a separation chamber through a communicating hole eccentrically opened in the nearly tangential direction to the cylindrical separation chamber so as to cause high speed rotation of gas and oil in the interior of separation chamber to separate oil of larger mass. CONSTITUTION:The gas taken in form a suction pipe 13 with the rotation of a rotary compressor is continuously compressed. In this case, oil 4 gathered in a closed container 1 is discharged with compressed gas from a discharge valve 15, and, after released in a discharge muffler chamber 17 in a fog-like state, it presses through a communicating hole 20 and is discharged into a separation chamber 19. Hereupon, since the communicating hole 20 is eccentrically opened in the nearly tangential direction to the separation chamber 19, fog-like oil discharged into the separation chamber 19 rotates at high speed in the direction of the arrow 21 together with gas. As a result, oil of larger mass is separated from gas by centrifugal force to drop down into oil 4. Accordingly, gas released from the separation chamber 19 into the closed container 1 turns out to be in a state almost free from oil, and the quantity of oil discharged from a discharge pipe 14 is extremely reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to rotary compressors, and more particularly to techniques for separating oil in the discharged gas thereof.

BACKGROUND OF THE INVENTION In recent years, compressors used in household refrigerators and the like have rapidly become horizontal rotary compressors because of their ease of storage.

A conventional rotary compressor will be described below with reference to the drawings. In FIG. 6, 1 is a horizontally long closed container, and a motor M consisting of a stator 2 and a rotor 3;
A compression device C driven by a motor M is housed therein. Reference numeral 4 indicates oil, which is collected at the bottom of the sealed container 1.

6 is a cylinder 〇, and 7 is a motor side plate and an anti-motor side plate, respectively, which are closely attached to both sides of the cylinder 6 and form a compression chamber 8. A shaft 9 is attached to the rotor 3 and has an eccentric portion 10 inside the cylinder 6. 11
is a roller that is rotated by the eccentric portion 10 and is inscribed in the compression chamber 8. A vane 12 is brought into pressure contact with the roller 11 from the cylinder 6 by a spring (not shown), thereby partitioning the compression chamber 8 into high and low pressure sides. Reference numeral 13 denotes a suction pipe, one end of which is fitted into the plate 7 on the side opposite to the motor, and the other end opened to the outside of the closed container 1. 14 is a discharge pipe which is welded to the closed container 1. 16 is a discharge valve provided on the plate 7 on the opposite side to the motor; 16 is a cover forming a discharge muffler chamber 17, and has a discharge hole 18.

Problems to be Solved by the Invention In the above configuration, the rotation of the rotor 30 is transmitted to the shaft 9, and the roller 11 fitted in the eccentric part 10 rotates eccentrically in the compression chamber 8 and is pressed against the roller 6. Due to the vane 12, the inside of the compression chamber 8 is on the high pressure side.

By being partitioned into the low pressure side, the gas sucked through the suction pipe 13 is continuously compressed. At this time, the oil 4 is sucked into the compression chamber 8 through the gap between the vane 11 and the cylinder 6, etc.
The gas is discharged together with the compressed gas from the discharge valve 16 and released into the discharge muffler chamber 17 , and then released into the closed container 1 through the discharge hole 18 and discharged from the discharge pipe 14 . As a result, the oil 4 is continuously taken out of the sealed container 1, resulting in problems such as poor refueling or oil leakage in the refrigeration system.

In view of the above problems, the present invention provides a rotary compressor in which the amount of oil taken out of a closed container is extremely reduced.

Means for Solving the Problems In order to solve the above-mentioned problems, the rotary compressor of the present invention includes a muffler chamber and a substantially cylindrical separation chamber, and a communication hole eccentrically opened in a substantially tangential direction of the separation chamber. The muffler chamber and the separation chamber are configured to communicate with each other.

According to the above-mentioned structure, the oil sucked into the compression chamber is released into the muffler chamber together with the gas and enters the separation chamber through the communication hole, but the opening of the communication hole is eccentric in the substantially tangential direction of the separation chamber. Because it is open, the gas and oil rotate at high speed in the separation chamber, where the oil with higher mass is centrifuged. Therefore, gas containing almost no oil is discharged from the discharge pipe.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3. Note that parts that are the same as those in the conventional example will be explained using the same reference numerals. Reference numeral 19 denotes a separation chamber bored in the cylinder 6 and has a substantially cylindrical shape. This separation chamber 19 is located above the oil 4 accumulated below the closed container 1. 20 is a communication hole communicating with the muffler chamber 17 and the separation chamber 19. This communication hole 2o is eccentric to the separation chamber 19 in a substantially tangential direction. Further, the outlet 19a of the separation chamber 19 is opened in the side wall of the cylinder 6 and is inclined downwardly to the closed container 1. Note that 21 is an arrow indicating the movement of oil contained in the gas.

In the above configuration, the rotation of the rotor 3 is caused by the shaft 9.
As a result, the roller 11 fitted in the eccentric portion 1o rotates eccentrically within the compression chamber 8, and the inside of the compression chamber 8 is partitioned into a high pressure side and a low pressure side by the vane 12 that is pressed against the roller 6. The gas sucked through the suction pipe 13 is continuously compressed. At this time, the oil 4 accumulated in the closed container 1 is sucked into the compression chamber 8 through the gap between the vane 11 and the cylinder 5, and is discharged from the discharge valve 15 together with the compressed gas.
After being released in the discharge muffler chamber 17 in the form of mist, it passes through the communication hole 2o and is discharged into the separation chamber 19. Here, since the communication hole 2o is eccentrically opened in a substantially tangential direction of the separation chamber 19, the mist oil discharged into the separation chamber 19 rotates at high speed in the direction of the arrow 21 within the separation chamber 19 together with the gas. As a result, the oil having a high mass is separated from the gas by centrifugal force, adheres to the wall surface of the separation chamber 19, and then drips into the oil 4 from the side wall of the cylinder 6. Therefore, the gas released into the closed container 1 from the separation chamber 19 contains almost no oil, and the amount of oil discharged from the discharge pipe 14 is extremely small.

Next, another embodiment of the present invention will be described with reference to FIGS. 4 and 6. In FIG. 4, the separation chamber 19 is bored in the plate 6 on the motor side, and in FIG. 6, the separation chamber 219 is bored in the plate 7 on the opposite side to the motor. In both embodiments, the separation chambers 119 and 219 are located above the oil 4 accumulated below the closed container 1, and the outlets are located on the side walls of the motor side plate 6 and the anti-motor side plate 7, respectively. It is opened and tilted toward the lower side of the closed container 1.

The effects obtained by the above configuration are similar to those of the previous embodiment.

Effects of the Invention As described above, the present invention has a muffler chamber and a substantially cylindrical separation chamber, and the separation chamber and the muffler chamber are communicated with each other through a communication hole eccentrically opened in a substantially tangential direction of the separation chamber. Well, since the oil contained in the discharged gas in the form of a mist is rotated at high speed in the separation chamber and centrifuged, the amount of oil discharged from the discharge pipe can be extremely small.
It is possible to prevent poor lubrication and oil tick phenomena, resulting in reductions in the amount of oil sealed in the compressor and savings in electricity costs.

[Brief explanation of the drawing]

FIG. 1 is an enlarged cross-sectional view of the main parts of a rotor IJ-compressor according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the rotary compressor shown in FIG. 1, and FIG. 3 is a reversal of FIG. 4 and 5 are enlarged sectional views of main parts of other embodiments, and FIG. 6 is a sectional view of a conventional rotary compressor. 4...Oil, 5...Cylinder, 6.
...Motor side plate, 7...Non-motor side plate, 16...Discharge valve, 17...
・Discharge muffler chamber, 1 ea, 119°219...
...Separation chamber, 2o...Communication hole. Name of agent: Patent attorney Toshi Nakao (1st person)
Figure II Terminus #L Yearning Figure 4 Figure 5, 1---
Cylinder 6 --- Motor reaches 7° Figure 6

Claims (4)

[Claims] (1) A motor having a stator and a rotor in a sealed container, a shaft rotated by this motor, a cylinder forming a compression chamber, and a motor side plate and a non-motor side plate that are tightly attached to both sides of the cylinder. , a compression device consisting of a roller that rotates eccentrically within the cylinder, a vane whose tip is in pressure contact with the roller and partitions the compression chamber into high and low pressure sides, and a muffler chamber from which the compressed gas is released; A rotary compressor comprising a cylindrical gas and oil separation chamber, the separation chamber and the muffler chamber being communicated through a communication hole eccentrically opened in a substantially tangential direction of the separation chamber. (2) The rotary compressor according to claim 1, wherein the separation chamber is provided in the cylinder. (3) The rotary compressor according to claim 1, wherein the separation chamber is bored in the motor side plate. (4) The rotary compressor according to claim 1, wherein the separation chamber is bored in the plate on the opposite side of the motor.