JPH11303779A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve oil separation ratio by colliding compressed gas against an oil separation plate immediately after being discharged. SOLUTION: An electric motor 2 and a compression part 3 are bilaterally arranged in a closed vessel 1. The compression part 3 has a fixed scroll having spiral laps on an end plate 4a, and a turning scroll 6 to be meshed with the fixed scroll 4 for forming a plurality of compression chambers 5. A space inside the closed vessel 1 is divided into a low pressure side and a high pressure side by the end plate 4a of the fixed scroll 4. The high pressure side serves as a discharge chamber 16 of compressed gas discharged from a discharge port 15 formed on the end plate 4a of the fixed scroll 4. The compressed gas is discharged from the discharge chamber 16 to the outside. Lubricating oil on the bottom of the closed vessel 1 is suctioned by a supplying mechanism to be supplied to sliding portions. In suc a hermetic compresser, an oil separation plate 19 is formed on the fixed scroll 4 on its side of the discharge chamber 16, faced to the discharge port on the end plate 4a, for separating lubricating oil from the compressed gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal hermetic compressor used for an air conditioner or the like, and more particularly to a structure of an oil separating plate for separating gas and lubricating oil.

[0002]

2. Description of the Related Art As shown in FIG. 4, for example, a conventional hermetic compressor has an electric motor 2 and a compression section 3 arranged on the left and right sides in a closed vessel 1, and the compression section 3 is spirally wound on a head plate 4a. A fixed scroll 4 having a wrap, and an orbiting scroll 6 meshing with the fixed scroll 4 to form a plurality of compression chambers 5
And an Oldham ring 7 for preventing the orbiting scroll 6 from rotating, and a lubricating oil passage 9 which is orbitally driven by forming a crankshaft 8 at the lower end of a orbiting drive shaft 6a of the orbiting scroll 6 and penetrating from the left end to the right end. And a bearing 11 which supports the crankshaft 8 to form a hermetic compressor.

[0003] The lubricating oil is sucked from an oil pump 12 for supplying lubricating oil to the sliding portion of the compression unit 3 through the lubricating oil passage 9 and an oil reservoir 13 provided at the bottom of the closed container 1. It comprises a suction pipe 14 leading to the oil pump 12.

The inside of the closed vessel 1 is divided into a low pressure side and a high pressure side by a head plate 4a of the fixed scroll 4, and a discharge port provided on the head plate 4a of the fixed scroll 4 at the high pressure side.
A discharge chamber 16 for compressed gas discharged from 15 is provided, and the low-pressure side is a motor chamber 2a. Between the discharge chamber 16 and the motor chamber 2a, a gas passage 17 for passing a compressed gas passing through the fixed scroll 4 and the bearing 11 and an oil passage 18 for returning lubricating oil are provided. .

In the above configuration, the lubricating oil supplied to the sliding portion is mixed in the refrigerant gas, and is discharged from the discharge port 15 to the discharge chamber 16 together with the compressed gas. A part of the lubricating oil mixed with the gas is separated in the discharge chamber 16 and returned to the oil reservoir 13 at the bottom of the sealed container 1. However, most of the oil separation was performed by passing the discharged compressed gas through the motor chamber 2a from the gas passage 17, but the separation rate was low and the lubricating oil could not be sufficiently supplied to the sliding parts. there were.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. An oil separator is provided so as to face a discharge port of a compressed gas, and the gas immediately after discharge is caused to collide with the oil separator. It is an object of the present invention to provide a hermetic compressor capable of improving the oil separation rate.

[0007]

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems. An electric motor and a compression section are disposed on the left and right sides in a closed container, and the compression section is provided on a mirror plate with a spiral wrap. A fixed scroll having a fixed scroll, a revolving scroll that meshes with the fixed scroll to form a plurality of compression chambers, and partitions the inside of the closed vessel into a low-pressure side and a high-pressure side by the end plate of the fixed scroll, and the high-pressure side. A discharge chamber for the compressed gas discharged from a discharge port provided on the end plate of the fixed scroll, discharges the compressed gas from the discharge chamber to the outside, and lubricating oil at the bottom of the sealed container is sucked up by a supply mechanism, and a sliding portion is formed. In the hermetic compressor supplied to the discharge chamber side facing the discharge port of the end plate of the fixed scroll, an oil separation plate for separating lubricating oil from the compressed gas is provided. You have me.

Further, the oil separating plate is formed in a fan shape.

Further, the oil separation plate is arranged in parallel with the end plate of the fixed scroll.

Further, a plurality of grooves extending vertically are provided inside the oil separating plate.

The oil separating plate is provided with a net-like or slit-like hole.

[0012] Further, a discharge hole is provided in the bottom surface of the oil separation plate.

[0013] The oil separating plate also serves as a valve presser of a discharge valve provided at a discharge port of a head plate of the fixed scroll.

[0014]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a transverse sectional view of a hermetic compressor showing an embodiment of the present invention, FIG. 2 (A) is an enlarged sectional view of a main part, and FIG. In the figure, an electric motor 2 and a compression unit 3 are disposed on the left and right sides in a closed container 1, and the compression unit 3 is engaged with a fixed scroll 4 having a spiral wrap on a head plate 4a and the fixed scroll 4 with each other. Orbiting scroll 6 forming a plurality of compression chambers 5
And an Oldham ring 7 for preventing the orbiting scroll 6 from rotating, and a lubricating oil passage 9 which is orbitally driven by forming a crankshaft 8 at the lower end of a orbiting drive shaft 6a of the orbiting scroll 6 and penetrating from the left end to the right end. And a bearing 11 which supports the crankshaft 8 to form a hermetic compressor.

The lubricating oil is sucked from an oil pump 12 for supplying lubricating oil to the sliding portion of the compression unit 3 through the lubricating oil supply passage 9 and an oil reservoir 13 provided at the bottom of the closed container 1. It comprises a suction pipe 14 leading to the oil pump 12.

The inside of the closed vessel 1 is divided into a low pressure side and a high pressure side by the end plate 4a of the fixed scroll 4, and a discharge port provided on the end plate 4a of the fixed scroll 4 at the high pressure side.
A discharge chamber 16 for compressed gas discharged from 15 is provided, and the low-pressure side is a motor chamber 2a. Between the discharge chamber 16 and the motor chamber 2a, a gas passage 17 for passing a compressed gas passing through the fixed scroll 4 and the bearing 11 and an oil passage 18 for returning lubricating oil are provided. .

The discharge port 15 of the end plate 4a of the fixed scroll 4
An oil separation plate 19 for separating lubricating oil mixed with the compressed gas is provided on the side of the discharge chamber 16 facing the pressure chamber. The oil separating plate 19 is a fan-shaped vertical portion facing the back of the end plate 4a in parallel.
19a, and a lower portion bent in a substantially inverted L-shape in cross section, and a horizontal portion 19b having a tip fixed to the back of the end plate 4a. The lubricating oil separated into the horizontal portion 19b is supplied to the discharge chamber 16a. A drain hole 19c for dropping the oil into the oil reservoir 13 at the bottom of the oil reservoir 13 is provided, and the lubricating oil dropped into the oil reservoir 13 is returned to the oil reservoir 13 of the suction pipe 14 through the oil passage 18, and It is configured so as to be supplied again to the sliding portion by means of 12.

A plurality of grooves 19 extending vertically inside the vertical portion 19a of the oil separating plate 19 and communicating with the discharge holes 19c.
d is provided. Further, the oil separating plate 19 has a structure in which a net-like or slit-like hole is provided in the vertical portion 19a.

In the above configuration, a fan-shaped oil separating plate 19 is provided to face the discharge port 15, and the compressed gas compressed by the compression section 3 is discharged from the discharge port 15, and the compressed gas is discharged from the oil separating plate. 19
The oil is separated by colliding with the gas, and as the gas rises, the flow path expands in a fan-shape to reduce the flow velocity and improve the oil separation rate. Also, a groove provided inside the oil separation plate 19
The lubricating oil is collected at 19d, and is quickly dropped by the gravity toward the discharge hole 19c, so that the hermetic compressor has an improved oil separation rate. Incidentally, a net-like or slit-like hole may be provided in the vertical portion 19a of the oil separation plate to improve the oil separation rate by a filter effect.

FIG. 5 shows another embodiment according to the present invention. On the discharge chamber 16 side of the discharge port 15, a discharge valve 15a for opening and closing the discharge port 15 is provided. Conventionally, this discharge valve 15a
In order to regulate the valve opening height, a valve presser covering the discharge valve 15a is fixed to the back of the end plate 4a. In the present invention, the valve retainer is also used by the oil separating plate 19 ', and the number of parts is reduced.
The oil separating plate 19 'forms an inclined portion 19b' from the lower portion of the vertical portion 19a 'toward the back of the end plate 4a, and the lower end thereof is fixed to the back of the end plate 4a. When the discharge valve 15a is closed, its tip collides with the rear surface of the end plate 4a and vibrates it, generating an impact sound (operation sound). The impact noise can be reduced by also using the valve holder covering the discharge valve 15a with the fan-shaped oil separating plate 19 '.

[0021]

As described above, according to the present invention, a fan-shaped oil separating plate is provided facing the discharge port, and the compressed gas compressed in the compression section is discharged from the discharge port, and this compressed gas is separated from the oil. By causing the gas to collide with the plate, the gas expands in a fan-shaped manner as it rises, reducing the flow velocity and improving the oil separation rate. Further, lubricating oil is collected in a groove provided on the inside of the oil separating plate, and is dropped by the gravity toward the discharge hole earlier, so that the hermetic compressor is improved in oil separation rate.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a hermetic compressor showing one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part showing one embodiment of the present invention;
(A) is a cross-sectional view, and (B) is a view on arrow a of (A).

FIG. 3 is an enlarged sectional view of a main part showing another embodiment of the present invention;
(A) is a cross-sectional view, and (B) is a view on arrow b of (A).

FIG. 4 is a longitudinal sectional view of a hermetic compressor showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Electric motor 2a Motor room 3 Compression part 4 Fixed scroll 4a End plate 5 Compression chamber 6 Orbiting scroll 6a Orbital drive shaft 7 Oldham ring 8 Crankshaft 9 Lubricating oil supply path 10 Shaft 11 Bearing 12 Oil pump 13 Oil reservoir 14 Suction Pipe 15 Discharge port 16 Discharge chamber 17 Gas passage 18 Oil passage 19 Oil separation plate 19a Vertical part 19b Horizontal part 19c Drain hole 19d Groove

Claims (7)

[Claims] An electric motor and a compression unit are disposed on the left and right sides in a closed container. The compression unit is provided with a fixed scroll having a spiral wrap on a head plate, and a plurality of compression chambers meshed with the fixed scroll. The orbiting scroll to be formed and the end plate of the fixed scroll partition the interior of the sealed container into a low-pressure side and a high-pressure side, and a discharge chamber for compressed gas discharged from a discharge port provided in the end plate of the fixed scroll at the high-pressure side. In the hermetic compressor, the compressed gas is discharged from the discharge chamber to the outside, and the lubricating oil at the bottom of the sealed container is sucked up by a supply mechanism and supplied to a sliding portion. An oil separating plate for separating lubricating oil from the compressed gas is provided on the discharge chamber side facing the compressor. 2. The hermetic compressor according to claim 1, wherein said oil separating plate is formed in a fan shape. 3. The hermetic compressor according to claim 1, wherein the oil separation plate is disposed in parallel with the end plate of the fixed scroll. 4. The hermetic compressor according to claim 1, wherein a plurality of vertically extending grooves are provided inside the oil separating plate. 5. The oil separating plate according to claim 1, wherein the oil separating plate is provided with a net-like or slit-like hole.
The hermetic compressor as described. 6. The hermetic compressor according to claim 1, wherein a discharge hole is provided in a bottom surface of the oil separation plate. 7. The fixed scroll according to claim 1, wherein the oil separation plate also serves as a valve presser of a discharge valve provided at a discharge port of the end plate of the fixed scroll. Hermetic compressor.