JP3203924B2 - Scroll compressor - Google Patents

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 for 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 sectional view of a horizontal scroll compressor having a structure in which a motor 103 and a compression mechanism 102 are arranged side by side in a closed container, and the space inside the closed container is used as a discharge chamber. 5 is an enlarged cross-sectional view of the compression mechanism.

The oil supply to the compression section of this compressor has been performed as described below. The lubricating oil in the oil reservoir 107 at the bottom of the discharge chamber is supplied from an oil pump 142 mounted on the sub-bearing side of the drive shaft 106 to an oil supply path 143 that passes through the inside of the drive shaft 106.
Through to the main bearing side. A part of the oil supply path 141 has a throttle mechanism provided inside the swirling spiral blade part 113.
As a result, it enters the turning head plate outer peripheral space 145 formed by the outer periphery of the turning head plate 112 and the bearing component 121 having the main bearing, is lifted up by the turning motion of the turning spiral blade 111, and is provided on the thrust surface 165 of the fixed scroll blade component 109. The two suction chamber communication grooves 147 and the oil supply groove 146 feed into the suction chamber located at the outermost periphery of the compression section, and at the same time, are guided to the inner compression chamber by this turning motion.

[0005]

However [0005] In the scroll compressor of the oil supply configuration as described above, it incorporates a movable sealing member to the tip portion of the orbiting wrap element as in FIG. 3, solid
When there is no movable seal member at the tip of the fixed spiral blade ,
When a sufficient amount of oil is not supplied due to a gap between the tip of the fixed spiral blade and the rotating spiral blade end plate, the outer periphery is surrounded by the rotating spiral blade from the high pressure side compression chamber surrounded by the fixed spiral blade. Leakage to the compression chamber on the low pressure side
There is a problem that the performance of the compressor is reduced. As a measure to solve this problem, there is a method of increasing the oil supply amount to the entire compression chamber to improve the sealing property.However, since the heat receiving loss of the working gas increases in proportion to the oil supply amount,
It is not appropriate as a countermeasure.

Accordingly, the present invention provides a scroll compressor having a structure in which a large amount of oil can be supplied to a compression chamber side surrounded by fixed swirl vanes requiring a seal without increasing the total amount of oil supplied to the compression chamber. Machine.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a scroll compressor according to the present invention comprises a swirl spiral blade of two communication grooves to a suction chamber provided on a thrust surface of a fixed spiral blade part. Of the first communication groove located near the end portion side
Adjust the area of the opening to the suction chamber to the end of the winding of the fixed spiral blade.
The opening area of the second communication groove located in the vicinity of the opening into the suction chamber is made smaller.

[0008]

The operation of the present invention having the above-described configuration is as follows.

[0009] Of the two communication grooves to the suction chamber provided on the thrust surface of the fixed spiral blade part, the communication groove having a small opening area to the suction chamber located on the winding end side of the swirl spiral blade is the swirl spiral blade. Oil is mainly contained in the suction chamber surrounded by the outside
Are supplied to the suction chamber surrounded outward to a fixed spiral blade
Since the face, some of the oil is fed also here in the suction chamber
You . On the other hand, the other fixed spiral blade ends
Instead, the communication groove having a large opening area to the suction chamber which is opened in the vicinity faces only the suction chamber surrounded by the fixed spiral blade, so that the oil is supplied only to the suction chamber on that side. As a result, a large amount of oil is supplied as a proportion to the suction chamber side surrounded by the fixed spiral blade. Oil supplied to each of the suction chambers by the pivoting movement of the orbiting wrap element, so gradually guided to the compression chambers of the respective high-pressure inside the tip
The compression chamber surrounded by the fixed spiral blade without the movable seal member is blessed with oil supply, and the leakage path to the low-pressure compression chamber surrounded by the swirling spiral blade is sealed.

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

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention constituted 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 longitudinal sectional view of an embodiment of a scroll compressor according to the present invention, and FIGS. 2 and 3 are enlarged sectional views of a main part of a compression mechanism.

A compression mechanism 2 and a stator 4 of a motor 3 for driving the compression mechanism 2 are fixed inside the closed casing 1, and a rotor 5 of the motor 3 is connected to a crankshaft 6 for driving the compression mechanism 2. The periphery of the compression mechanism 2 is an oil reservoir 7. Compression mechanism 2
Has a movable seal portion at a tip portion formed integrally with the fixed end plate 8.
A fixed swirl blade part 10 having a fixed swirl blade 9 having no material, and a swirl swirl blade 11 having a movable seal member 44 at the tip of the blade that meshes with the fixed swirl blade 9 to form a plurality of compression chambers 14. A swirling spiral blade part 13 formed on the end plate 12, a rotation restricting part 15 for preventing the swirling spiral blade part 13 from rotating and only turning, and a rotating end plate 12 provided on the opposite side of the swirling spiral blade 11. Bearing component 21 having a rotating drive shaft 16, an eccentric bearing 17 provided inside the main shaft 18 of the crankshaft 6, into which the rotating drive shaft 16 is fitted, and a main bearing 19 supporting the main shaft 18 of the crankshaft 6. And a mirror plate rear surface 20 on the rear surface of the revolving mirror plate 12.
At a small gap from the swirling spiral blade part 1
Third, a flat plate component 24 having an axial movement restriction plane 23 for restricting the axial movement is arranged. This flat plate part 24
In addition, a sliding partition ring 25 is provided for partitioning the gas pressure applied to the head rear face 20 into a discharge pressure applied to the central portion and a pressure lower than the discharge pressure applied to the outer periphery of the head rear face 20. The refrigerant gas sucked from the suction pipe 30 of the compressor enters the compression mechanism 2 through the suction port 32 of the compression mechanism 2 and is compressed in the compression chamber 14.
From the discharge port 33, the liquid is discharged to a discharge chamber 37 between the electric motor 3 and the compression mechanism 2 through a discharge chamber 34, a discharge passage 35 provided on the outer periphery of the fixed head 8, and a discharge passage 36 provided in the bearing component 21. The discharged refrigerant gas passes through the motor peripheral passage 38 and is guided from the discharge pipe 39 to the outside of the compressor.

On the other hand, the oil forcibly supplied by the pump 42 from the oil reservoir 7 enters the expansion device 40 mounted in the revolving end plate 12 via an oil supply path 43 provided in the drive shaft 6.
The oil adjusted to an appropriate amount by the expansion device 40 is supplied to the revolving head 1
2 and the end plate outer peripheral space 45 formed by the bearing component 21. The end plate outer peripheral space 45 in the sump was oil being written up by the pivoting movement of the orbiting end plate 12, is formed on the thrust surface 65 of the fixed wrap element part 10, the
To the suction chamber located near the end of winding of the fixed spiral blade.
A second communication hole 48 having a large opening area, and a swirling spiral blade;
Are guided to the respective suction chambers by an amount proportional to the opening area from the second communication hole 47 having a small opening area located near the winding end portion . End of swirling spiral blade
The communication groove with a small opening area to the suction chamber located on the
Oil is mainly supplied to the suction chamber surrounded by the spiral blade
However, there is also a suction chamber surrounded by fixed swirl vanes.
Therefore, some oil is also sent to this suction chamber.
On the other hand, the other fixed spiral blade ends
A communication groove with a large opening area to the suction chamber that opens in the vicinity is fixed.
Since it faces only the suction chamber surrounded by the constant swirl blades,
The oil is sent only to the suction chamber on the side of this.

[0015] With the above arrangement, the fixed swirl vanes are placed on the outside.
A large amount of oil is supplied as a percentage to the enclosed suction chamber.
It is. The oil supplied to each suction chamber is swirled
Of each internal high pressure gradually by the swiveling motion of
Since it is guided to the contraction chamber, do not have a movable seal member at the tip.
Oil is supplied to the compression chamber 14a, which is surrounded by fixed swirl vanes.
Low-pressure compression chamber surrounded by swirling swirl vanes
The leak path to is sealed. As a result, it is possible to efficiently seal both compression chambers without increasing the total oil supply amount, and to improve compressor performance.

[0016]

The effect of the present invention is as follows. Of the two communication grooves to the suction chamber provided on the thrust surface of the fixed spiral blade part, the suction groove of the communication groove located on the winding end side of the revolving spiral blade is moved to the suction chamber. The opening area of the fixed spiral blade near the end of winding.
By making the communication groove to be placed smaller than the opening area to the suction chamber, more oil can be supplied as a percentage to the compression chamber side surrounded by the fixed spiral blades, increasing the total supply amount. Without this, it is possible to efficiently seal both compression chambers and improve the compressor performance.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a scroll compressor according to an embodiment of the present invention.

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

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

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

FIG. 5 is an enlarged cross-sectional view of a compression mechanism of a conventional scroll compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Compression mechanism 3 Electric motor 6 Crankshaft 8 Fixed end plate 9 Fixed swirl blade 10 Fixed swirl blade part 11 Swirl swirl blade 12 Swirl end plate 13 Swirl swirl blade part 14 Compression chamber 15 Rotation restraint part 18 Main shaft 19 Main bearing 20 Swirl end plate Back 21 Bearing parts 25 Sliding partition ring 40 Throttling device 42 Oil supply pump 43 Oil supply path 44 Movable seal member 45 End plate outer peripheral space

Continued on the front page (72) Inventor Takashi Morimoto 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72) Inventor Shozo Hase 1006 Odaka Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72 Inventor Teruyuki Akazawa 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Hideo Hirano 1006 Odaka Kazuma Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Kiyoshi Sano Osaka 1006, Kazuma, Kamon, Fumonma-shi Matsushita Electric Industrial Co., Ltd. (58) Field surveyed (Int.Cl. ⁷ , DB name) F04C 18/02 311 F04C 29/02 311

Claims (1)

(57) [Claims] An electric motor and a compression mechanism driven by the electric motor are provided inside a closed container, and the compression mechanism is formed by forming a fixed spiral blade having no movable seal member at a tip on a fixed head plate. A swirl vane part, a swirl vane part having a movable seal member at a tip end that meshes with the fixed swirl blade to form a plurality of compression chambers and is formed on a swivel end plate; A rotating restraint component for preventing rotation and only rotating, a crankshaft for rotating and driving the spiral blade component, and a bearing component having a main bearing for supporting a main shaft formed on the crankshaft; A sliding partition ring that divides the pressure applied to the rear surface of the head plate into a discharge pressure applied to a central portion and a pressure lower than the discharge pressure outside the pivot axis provided on the back surface of the head plate opposite to the spiral blade. And the inside of this sliding partition ring,
A throttle mechanism is provided for an oil supply path communicating between the outer periphery of the turning head plate and the head plate outer space formed by bearing parts, and a communication mechanism 2 is provided for communicating the head plate outer space with a suction chamber provided in the fixed spiral blade component. Two communication grooves are provided , and the opening area of the first communication groove, which is located in the vicinity of the winding end portion side of the swirling spiral blade, to the suction chamber is determined by the end of the winding of the fixed spiral blade.
Area of the second communication groove located in the vicinity of the suction portion to the suction chamber
Scroll compressor having the configuration smaller than that.