JPS6179891A - Sealed type rotary compressor - Google Patents

Abstract

PURPOSE:To improve the oil separating function by installing a discharge cover onto the lower edge plate of a compression mechanism part and introducing the gas in the discharge cover into the upper part of the compression mechanism part through the bent passages formed onto the cylinder body. CONSTITUTION:A discharge cover 10 for forming a discharge space for temporarily storing the discharged gas is installed onto the lower part edge plate 8 of a compression mechanism part. Though the discharged gas in the discharge cover is introduced into the upper part of the compression mechanism part through the bent passages 11'a and 11'b, the outlet of the bent passage is formed from a cut part 11'c formed onto the cylinder body and the inner wall of the sealed container 1. Therefore, the oil separating function is improved by shifting the direction of flow of the discharge gas with the simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application The present invention relates to a hermetic rotary compressor used in refrigeration equipment and the like.

Structure of the conventional example and its problems In FIGS. 3 and 4, 1 is a closed container, inside which is a motor part A consisting of a stator 2 and a rotor 3, and this motor part A.
A compressor section B is provided which is driven by. The compressor section B includes a cylinder body 4' forming a cylindrical cylinder 4, a roller 5 inside the crank 4, a crankshaft 6 in which an eccentric part 6a is rotatably inserted inside the roller 5, and the above-mentioned cylinder body 4'. It has an upper end plate 7 and a lower end plate 8 which close the upper and lower ends of the crank 4 and also serve as bearings for the crank 1111116, and are fixed to the crank body 4' with bolts or the like. Further, the cylinder body 4' is provided with a partition plate (not shown) that slides linearly to partition the inside of the cylinder 4 into a suction side and a compression side, and is always pressed against the roller 5 side by a spring force. The crankshaft 6 is press-fitted into the rotor 3, and when the rotor 3 rotates, the crankshaft 6 also rotates, and the roller 5 also rotates along the inside of the cylinder 4 following the eccentric portion 6a of the crankshaft 6.

Further, a discharge device 9 is provided on the lower end plate 8, and a metal discharge cover 10 is attached to the discharge device 9 to temporarily store compressed gas in the discharge space C outside the discharge device @9 during discharge. It is separated from the lubricating oil (not shown) located at the bottom of the closed container 1. Further, a lower end plate 8, a cylinder body 4'
Communication path 8 b + 4' a + in the top end plate 7
7a is formed in the axial direction of the compressor.

When the compressor having the above structure is operated, gas enters the cylinder 4 and is surrounded by the inner wall of the cylinder 4, the roller 6, and the partition plate (not shown) as is well known.

Then, as the roller 5 rotates following the eccentric portion 6a of the crankshaft 6, the gas is compressed, and the discharge hole 8 of the lower end plate 8
a into the discharge space C consisting of the lower end plate 8 and the discharge cover 10 covering the outer surface of the lower end plate 8 through the discharge device 9, and the lower end plate 8, the cylinder body 4' and the upper end plate 7 in the axial direction of the compressor. Formed communication path 8 b + 4' 117
a, and is discharged into the upper space of the compressor.

However, in such a structure, as shown in FIG. 4, the position of the communication passage 7a of the upper end plate 7 is often close to the winding 2a of the stator 2 of the motor section A, and the high temperature state and tC is,
Since the compressed gas collides with the winding 2a at a considerable flow velocity, there is a risk that the temperature of the winding 2a will increase, leading to a decrease in reliability. Further, a discharge cover 1 that covers the outer surface of the lower end plate 8 is provided.
0 is compressed gas and lubricating oil at the bottom of sealed container 1 (not shown)
The lower end plate 8 is separated from the lower end plate 8 to form a discharge space C.
It is difficult to make a perfect seal between the and the discharge cover 10, and the lubricating oil enters the discharge space C, and the compressed gas and lubricating oil become a mixed gas, and the communication passages 8b, 4'a, 7a
The oil was discharged into the upper space of the compressor and leaked out of the compressor, causing problems such as a decrease in reliability due to oil buildup inside the compressor and a decrease in the performance of the refrigeration system.

Purpose of the Invention The present invention solves these problems and provides a closed rotary compressor that improves reliability and performance by improving the reliability of the stator winding during compressor operation and reducing the amount of lubricant discharged within the compressor. The purpose is to provide a machine.

Structure of the Invention In order to achieve the above object, the present invention forms a communication path in the lower end plate and the cylinder body to guide the compressed gas in the discharge space surrounded by the lower end plate and the discharge cover in the axial direction of the compressor. Further, the communication passage of the cylinder body is bent and opened in the radial direction of the compressor midway, and a notch is formed at the open end of the communication passage for discharge.

DESCRIPTION OF EMBODIMENTS An actual example of the present invention will be described below with reference to FIGS. 1 and 2. Here, parts having the same functions as those in FIGS. 3 and 4 are given the same reference numerals.

In FIGS. 1 and 2, 11' is a cylinder body, and a cylindrical nolinta 11 is formed therein.

The compressor main body 11' includes a communication passage 11'a extending in the axial direction of the compressor and communicating with the communication passage 8b of the lower end plate 8, a communication passage 11'b opening in the radial direction of the compressor from the middle thereof, and the communication passage 11'b. A notch 11'c is formed at the open end of the passage 11'b. The notch 11'c is open only in the direction of the upper end plate 12 [
There is.

In the case of the compressor configured as described above, compressed gas enters the discharge space C, passes through the communication passage 8b of the lower end plate 8 and the communication passages 11'a and 11'b of the cylinder body 11', and then passes through the notch 11'c. Since the high-temperature, high-speed compressed gas discharged from the stator 2 does not directly collide with the winding 2a of the stator 2, it is possible to prevent a decrease in reliability due to an increase in the temperature of the stator winding 2a. In addition, since the compressed gas collides with the wall surface of the closed container 1, the compressed gas that contains lubricating oil and is in a mixed state can be separated into gas and lubricating ffi, reducing the discharge of lubricating oil to the outside of the compressor 7 machine. In addition to improving the reliability, the efficiency of the refrigeration system can also be improved.

Effects of the Invention As is clear from the above embodiments, the present invention forms a communication path in the lower end plate and the cylinder body that guides the compressed gas in the discharge space surrounded by the lower end plate and the discharge cover in the 11q11 direction of the compressor. , furthermore, the communication passage 1 of the cylinder body.
The structure is such that the compressor is bent and opened in the radial direction in the middle, and a notch is formed at the open end of the communication path, so the compressed gas does not directly collide with the stator windings, and the lubricating oil and gas are separated. It is possible to separate the lubricating oil from the compressor, reduce the amount of lubricating oil discharged from the compressor, and improve the reliability of the compressor and the performance of the refrigeration system. Furthermore, since the cylinder body is provided with a communication passage and a notch, it has a simple structure and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a partial front sectional view of a hermetic rotary compressor showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a compressor showing a conventional example. 4 is a front sectional view of the 3rd
FIG. 3 is a partial cross-sectional view of the compressor at a different angle in the figure. 1...Airtight container, 5...Roller, 6...
...Crankshaft, 8...Lower end plate, 8b.
...Communication path, 9...Discharge device, 1o...
...Discharge cover, 11...Cylinder, 11
'...Cylinder body, 11'a...Communication path, 11'b...Communication path, 11'C...
・Notch part, 12... Upper end plate, A...
Electric motor section, C...Discharge space. Figure 1, 3 Figure 2

Claims (1)

[Claims] An airtight container, a motor part housed and fixed in the airtight container, a roller driven by the motor part and a crankshaft, a cylinder body forming a cylinder that is a cylindrical cylinder, and a suction side and a compression side in the cylinder. a partition plate that partitions the cylinder, an upper end plate that closes the upper and lower ends of the cylinder and also serves as a bearing for the crankshaft, and a lower end plate that includes a discharge device; a discharge cover that forms a discharge space that temporarily stores compressed gas discharged from the discharge device, and a communication path that guides the compressed gas in the discharge space in the axial direction of the compressor is formed in the lower end plate and the cylinder body. The hermetic rotary compressor further comprises: a communication passage in the cylinder body that is bent and opened in the radial direction of the compressor in the middle, and a cutout is formed at the open end of the communication passage.