JPH08312546A - Horizontal scroll compressor - Google Patents

Abstract

PURPOSE: To supply the oil to a compression chamber side, of which outside is surrounded by a fixed spiral vane required for sealing, at a higher rate by providing an opening, which is opened toward a suction chamber, of a communication groove provided in the thrust surface of a fixed spiral vane part for communicating a peripheral space of an end plate with the suction chamber provided in the fixed spiral vane part, at a specified position. CONSTITUTION: An opening, which is to be opened toward a suction chamber, of a communication groove 49, which is provided in the thrust surface 65 of a fixed spiral vane part, is provided at a position in a range about at ±60 deg. around a virtual line, which connects the center of the fixed spiral vane part and a vent hole provided in the lowest part. Consequently, the communication groove 49 facing to the suction chamber is always positioned under the oil surface during the operation of a compressor, the oil can be stably supplied into the suction chamber. Since the communication hole faces only to the suction chamber, of which outside is surrounded by the fixed spiral vane 9, the oil is supplied only to the suction chamber of the same side. As a result, the oil is supplied to the suction chamber side, of which outside is surrounded by the fixed spiral vane 9, at a higher rate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor used in an air conditioner or the like.

[0002]

2. Description of the Related Art A conventional scroll compressor of this type will be described with reference to the drawings.

FIG. 4 is a vertical cross-sectional view of a horizontal scroll compressor having a structure in which a motor 103 and a compression mechanism section 102 are arranged side by side in a closed container, and the space inside the closed container serves as a discharge chamber. FIG. 4 is an enlarged cross-sectional view of the compression mechanism section.

Oil supply to the compression section in this compressor has been performed as follows. The lubricating oil in the oil reservoir 107 at the bottom of the discharge chamber is penetrated from the oil pump 142 mounted on the auxiliary bearing side of the drive shaft 106 into the drive shaft 106.
To the main bearing side. A part of this is formed by the oil supply path 141 having the throttle mechanism 140 provided inside the swirling spiral blade part 113, the outer circumference of the swirling end plate 112, and the swirl end plate outer peripheral space 14 formed by the bearing part 121 having the main bearing.
5 and is swung up by the swirling motion of the swirling spiral blade 111, and thrust surface 165 of the fixed spiral blade component 110.
It was sent to the suction chamber located at the outermost periphery of the compression section from the two suction chamber communication grooves 147 and the oil supply groove 146 provided at the same time, and at the same time, it is guided to the inner compression chamber by this turning motion.

[0005]

However, in the scroll compressor having the oil supply structure as described above, when the movable seal member is incorporated in the tip portion of the swirling spiral blade as shown in FIG. Since a gap is created between the swirling spiral vane end plates, unless sufficient oil is supplied, the compression chamber on the high pressure side, which is surrounded by the fixed spiral vanes, is compressed to the low pressure side, which is surrounded by the swirling spiral vanes. There is a problem in that the leakage of the air occurs and the performance of the compressor is deteriorated.

As a measure to solve this problem, there is a method of increasing the amount of oil supplied to the compression chamber to improve the sealing property, but the heat-receiving loss of the working gas also increases in proportion to the amount of oil supplied. Therefore, it cannot be said that it is an appropriate countermeasure.

In view of the above, the present invention provides a scroll compression system in which a large amount of oil can be supplied as a percentage to the side of the compression chamber surrounded by fixed spiral blades that require sealing without increasing the total amount of oil supplied to the compression chamber. Machine.

[0008]

In order to solve the above-mentioned problems, a scroll compressor of the present invention is provided with a fixed scroll vane component that connects the end plate outer peripheral space and a suction chamber provided in the fixed spiral vane component. The opening to the suction chamber of the communication groove provided on the thrust surface, with a virtual line connecting the center of the fixed spiral blade component and the gas vent hole provided at the bottom, as a center line,
It is provided at a position within approximately ± 60 °.

[0009]

The operation of the present invention, which is configured as described above, is as follows.

Since the communication groove to the suction chamber provided in the range of the thrust surface of the fixed spiral vane component to the suction chamber is always located under the oil surface during the operation of the compressor, the oil can be stably supplied. It can be supplied into the inhalation chamber.

Further, since the communication hole faces only the suction chamber surrounded by the fixed spiral vane, the oil is fed only to the suction chamber on the same side. As a result, a large amount of oil is supplied as a ratio to the suction chamber side surrounded by the fixed spiral vanes.

Further, since the oil supplied to the suction chamber on the same side is gradually guided to the respective high-pressure compression chambers inside by the swirling motion of the swirling spiral vanes, the compression chambers surrounded by the fixed swirl vanes are surrounded. It is blessed with oil supply, and the leakage path to the low pressure compression chamber surrounded by the swirling spiral vanes is sealed.

As described above, a large amount of oil can be supplied as a proportion to the side of the compression chamber surrounded by the fixed spiral vanes that require sealing without increasing the total supply amount.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention constructed by incorporating a movable seal member at the tip of a swirling spiral blade will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view of an embodiment of a scroll compressor of the present invention, and FIGS. 2 and 3 are enlarged sectional views of a compression mechanism portion.

The compression mechanism 2 and the stator 4 of the electric motor 3 for driving the compression mechanism 2 are fixed inside the closed container 1, and the rotor 5 of the electric motor 3 is connected to the crankshaft 6 for driving the compression mechanism 2 to form the closed container 1 The periphery of the compression mechanism 2 is used as an oil sump 7. Compression mechanism 2
Has a fixed spiral blade component 10 having a fixed spiral blade 9 formed integrally with the fixed end plate 8 and a movable seal member 44 at the blade tip portion which meshes with the fixed spiral blade 9 to form a plurality of compression chambers 14. The swirl vane 11 is attached to the swivel end plate 1.
2, the swirling spiral blade component 13, the rotation restraining component 15 for preventing the rotation of the swirling spiral blade component 13 to rotate only, and the swirling spiral blade 11 of the swirling end plate 12.
Of the crankshaft 6, an eccentric bearing 17 provided inside the main shaft 18 of the crankshaft 6 into which the rotary drive shaft 16 is fitted, and a main bearing 19 for supporting the main shaft 18 of the crankshaft 6. And a flat plate part having an axial movement restricting plane 23 for restricting the axial movement of the swirling spiral blade part 13 with a minute gap from the end plate back surface 20 on the back surface of the swirling end plate 12. Place 24. A sliding partition ring 25 for partitioning the gas pressure applied to the end plate back surface 20 into a discharge pressure applied to the central portion and a pressure lower than the discharge pressure applied to the outer circumference of the end plate back surface 20 is disposed on the flat plate component 24. The refrigerant gas sucked from the suction pipe 30 of the compressor is
The compression mechanism 2 enters the compression mechanism 2 through the suction port 32, is compressed in the compression chamber 14, and is discharged from the discharge port 33 to the discharge chamber 34, the discharge passage 35 provided on the outer periphery of the fixed end plate 8, and the discharge passage 36 provided to the bearing component 21. Is discharged to the discharge chamber 37 between the electric motor 3 and the compression mechanism 2. The discharged refrigerant gas is guided to the outside of the compressor from the discharge pipe 39 through the electric motor peripheral passage 38.

On the other hand, the oil forcibly supplied by the pump 42 from the oil sump 7 enters the throttle device 40 mounted in the turning end plate 12 through the oil supply path 43 provided in the drive shaft 6.
The oil adjusted to an appropriate amount by the expansion device 40 is used as the turning end plate 1.
2 and the end plate outer peripheral space 4 formed by the bearing component
Stored in 5. The oil accumulated in the outer peripheral space 45 of the end plate is supplied from the communication groove 49 provided below the thrust surface 65 of the fixed spiral vane component 10 to the suction chamber which is surrounded by the fixed spiral vane 9 and is swirled. It is lifted up by the turning motion of the end plate 12, and is also guided to the left and right suction chambers from the oil supply groove 46 provided on the thrust surface 65.

With the above structure, a large amount of oil can be supplied to the side of the compression chamber 14a surrounded by the fixed spiral vane on the outside, and efficient sealing of both compression chambers is possible without increasing the total supply amount. Therefore, the performance of the scroll compressor can be improved.

[0019]

As described above, the effect of the present invention is that the communication groove provided on the thrust surface of the fixed spiral vane component for communicating the outer peripheral space of the end plate with the suction chamber provided in the fixed spiral vane component is opened to the suction chamber. Is provided at a position within about ± 60 ° with a virtual line connecting the center of the fixed spiral blade component and the gas vent hole provided at the lowermost part as the center line, the outer side of the fixed spiral blade is A large amount of oil can be supplied to the enclosed compression chamber side as a percentage, and efficient sealing of both compression chambers is possible without increasing the total supply amount, and the performance of the compressor can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a scroll compressor of the present invention.

FIG. 2 is an enlarged vertical sectional view of the compression mechanism section.

FIG. 3 is an enlarged cross-sectional view of the compression mechanism section.

FIG. 4 is a vertical sectional view of a conventional scroll compressor.

FIG. 5 is an enlarged transverse sectional view of a compression mechanism portion of a conventional scroll compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 airtight container 2 compression mechanism 3 electric motor 6 crankshaft 8 fixed end plate 9 fixed spiral blade 10 fixed spiral blade part 11 swirl spiral blade 12 swirl end plate 13 swirl spiral blade part 14 compression chamber 15 rotation restraint part 18 main spindle 19 main bearing 20 swirl mirror plate Rear surface 21 Bearing part 25 Sliding partition ring 40 Throttle device 42 Oil supply pump 43 Oil supply path 44 Movable seal member 45 End plate outer peripheral space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Morimoto 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Shozo Hase, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Teruyuki Akazawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Kiyoshi Sano Osaka 1006 Kadoma, Kadoma Matsushita Electric Industrial Co., Ltd. (72) Inventor Hideo Hirano Osaka Prefecture 1006 Kadoma, Kadoma-shi, Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A fixed spiral vane component in which an electric motor and a compression mechanism driven by the electric motor are disposed inside a closed container, and the compression mechanism is a fixed scroll vane component in which fixed spiral vanes are formed on a fixed end plate, and the fixed scroll. A swirl spiral blade component having a swirl spiral blade having a movable seal member at its tip end that meshes with the blade to form a plurality of compression chambers, and a swirl spiral blade component that prevents rotation of the swirl spiral blade component and only swirls. A rotation restraint component, a crankshaft for driving the spiral vane component to rotate, and a bearing component having a main bearing for supporting a main shaft formed on the crankshaft. A slide partition ring is provided outside the swivel shaft provided on the rear face of the end plate to partition the pressure exerted on the rear face of the end plate into a discharge pressure applied to the central portion and a pressure lower than the discharge pressure. Within When, the outer periphery of the orbiting end plate and,
An oil supply path communicating with the outer peripheral space of the end plate formed by the bearing component is provided inside the swirling spiral vane component via a throttle mechanism, and the outer peripheral space of the end plate and the suction chamber provided in the fixed spiral vane component are provided. An opening to a suction chamber of a communication groove provided on the thrust surface of the fixed spiral blade component communicating with each other,
A horizontal scroll compressor provided at a position within approximately ± 60 ° with an imaginary line connecting the center of the fixed scroll blade component and the gas vent hole provided at the bottom as a center line.