JPH07189947A - Scroll compressor - Google Patents

Abstract

PURPOSE:To enhance performance of a compressor without causing its deterioration due to thermal expansion of a refrigerant by preventing oil from excessively flowing in a compression chamber surrounded by a fixed spiral blade. CONSTITUTION:A communicating groove 47 for communicating an end plate outer peripheral space 45 with an intake chamber disposed in a fixed spiral blade part 10 is formed only at a thrust surface of the fixed spiral blade part 10 on a side of a winding end portion of a turning spiral blade 11.

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 an oil supply path 143 having a throttle mechanism provided inside the swirling spiral blade part 113.
As a result, it enters the swirl mirror plate outer peripheral space 145 formed by the outer circumference of the swirl mirror plate 112 and the bearing component 121 having the main bearing, is lifted up by the swirl motion of the swirl spiral vane 111, and is provided on the thrust surface 165 of the fixed spiral vane component 110. It was configured to be fed from the two suction chamber communication grooves 147 and the oil supply groove 146 to the suction chamber located at the outermost periphery of the compression portion, and at the same time, guided to the inner compression chamber by this swirling motion.

[0005]

However, as shown in FIG. 5, a communication groove to the suction chamber provided on the thrust surface of the fixed spiral vane component communicates with the compression chamber which is surrounded by the fixed spiral vane. However, there is a problem in that the oil excessively flows into the compression chamber surrounded by the fixed spiral vanes through the communication groove, and the compressor performance is deteriorated by heating and expanding the refrigerant.

In view of the above problems, the present invention provides a scroll compressor having a structure for preventing excessive oil from flowing into a compression chamber surrounded by the fixed spiral vanes.

[0007]

In order to solve the above-mentioned problems, a scroll compressor of the present invention has a communication groove for communicating the outer peripheral space of the end plate and a suction chamber provided in the fixed spiral vane component with the swirling spiral. The structure is provided only on the thrust surface of the fixed spiral blade component on the winding end side of the blade.

[0008]

The function of the present invention is as follows.
The opening area of the communication groove provided on the thrust surface of the fixed spiral vane component to the suction chamber, which is surrounded by the fixed spiral blade, is reduced, and excessive inflow of oil can be prevented.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical 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 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
Is a fixed spiral blade component 10 having a fixed spiral blade 9 formed integrally with the fixed end plate 8, and a swirl spiral blade 11 that meshes with the fixed spiral blade 9 to form a plurality of compression chambers 14.
Swirl blade component 13 formed on the swirl end plate 12
A rotation restraint component 15 for preventing the rotation of the swirl spiral blade component 13 to rotate only, a swivel drive shaft 16 provided on the opposite side of the swirl spiral blade 11 of the swirl end plate 12, and a main shaft of the crankshaft 6. This swivel drive shaft 16 is provided inside 18
Eccentric bearing 17 into which is inserted, and the main shaft 1 of this crankshaft 6.
A bearing component 21 having a main bearing 19 for supporting 8 and an axial movement limit for limiting the axial movement of the swirling spiral blade component 13 with a small gap from the rear face plate 20 of the rear face of the swirling mirror plate 12. A flat plate component 24 having a flat surface 23 is arranged. 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 enters the compression mechanism 2 from the suction port 32 of the compression mechanism 2, is compressed in the compression chamber 14, and is provided from the discharge port 33 to the discharge chamber 34 and the outer periphery of the fixed mirror plate 8. The electric motor 3 and the compression mechanism 2 pass through the discharge passage 35 and the discharge passage 36 provided in the bearing component 21.
Is discharged to the discharge chamber 37 between. This discharged refrigerant gas is
It passes through the electric motor peripheral passage 38 and is guided to the outside of the compressor from the discharge pipe 39.

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
It is stored in 5. The oil accumulated in the outer peripheral space 45 of the end plate is scraped up by the turning motion of the turning end plate 12, and the oil supply groove 46 provided in the thrust surface 65 of the fixed spiral blade part 10 is provided.
At the same time, it is guided to the suction chamber through the communication groove 47.

With the above structure, the oil excessively flows into the suction chamber surrounded by the fixed spiral vanes through the communication groove, and the compressor performance is not deteriorated by heating and expanding the refrigerant. The performance can be improved.

[0014]

As is apparent from the above, according to the present invention, the communication groove for communicating the outer peripheral space of the end plate with the suction chamber provided in the fixed spiral vane component is provided with the fixed spiral on the winding end side of the swirl spiral vane. By providing only on the thrust surface of the blade component, the opening area of the communication groove provided on the thrust surface of the fixed spiral blade component to the suction chamber that is surrounded by the fixed spiral blade is reduced, and excessive inflow of oil is prevented. Therefore, it is possible to improve the compressor performance without degrading the compressor performance due to heat expansion of the refrigerant.

[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 Hideo Hirano 1006 Kadoma, Kadoma City Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Kiyoshi Sano Osaka Prefecture 1006 Kadoma, Kadoma-shi, Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. An electric motor and a compression mechanism driven by the electric motor are provided inside a hermetic container, and the compression mechanism includes a fixed spiral blade component having a fixed spiral blade formed on a fixed end plate.
A swirling swirl vane component having swirl swirl vanes formed on a swirl end plate to mesh with the fixed swirl vane to form a plurality of compression chambers; A swivel shaft provided on the end face of the swirl end plate on the side opposite to the swirl vane of the crank shaft for rotating the swirl vane part and a main bearing for supporting a main shaft formed on the crank shaft. A sliding partition ring for partitioning the pressure applied to the back surface of the end plate into a discharge pressure applied to the center and a pressure lower than the discharge pressure is provided outside the An oil supply path communicating with the outer periphery and the outer peripheral space of the end plate formed by the bearing component is provided inside the swirl vane component through a throttle mechanism, and is provided in the outer peripheral space of the end plate and the fixed spiral vane component. It was suction chamber and the scroll compressor a communication groove formed by providing only the thrust surface of the fixed wrap element part winding end portion side of the orbiting wrap element communicating.