JPS6291689A - Closed type rotary compressor - Google Patents

Abstract

PURPOSE:To reduce the lubricating oil discharged from a discharge pipe, to the minimum, by setting an oil stopper above a discharge hole of an upper muffler, which is one of mufflers set on upper/lower end plates which close both ends of s cylinder wall. CONSTITUTION:The closed type rotary compressor stated in the titled is constituted as keeping a compressor element driven by an electricmotor element containing a rotor 8 and a stator 9, in a closed vessel 1 in which lubricating oil is stored. In this compressor element, a piston 3 which is equipped with a radially slidable blade 5, is kept in a cylinder 2 which has a cylindrical wall, and upper/lower mufflers 12, 13 are set on the upper/lower end plates 6, 7 which close both ends of the cylinder 2, respectively. In this closed type rotary compressor, an oil stopper 19 is fixedly set above a discharge hole 14 of the upper muffler 12. Then, it is prevented that the flow of lubricating oil discharged from the upper part of a boss of the upper end plate 6, is stirred by the rotary motion of the rotor 8, and blown up by blowout gas from the discharge hole 14.

Description

[Detailed description of the invention] ´Industrial application field The present invention relates to a hermetic rotary compressor.

BACKGROUND OF THE INVENTION In recent years, oil separation devices for hermetic rotary compressors have become important in order to achieve high reliability and high efficiency of compressors.

An example of the conventional oil separation device for a hermetic rotary compressor will be described below with reference to the drawings.

FIG. 4 shows an oil separation device for a conventional hermetic rotary compressor.

In the same figure, a cylinder 2 and a piston 3 are placed inside a closed container 1.
, a compression mechanism for a shaft 4 having an eccentric portion, a blade 5 for separating a high pressure side and a low pressure side, an upper end plate 6 and a lower end plate 7 that support the shaft 4, and an upper muffler 12 and a lower muffler 13 that form a silencing chamber, respectively. It has a rotor 8 and a stator 9, which are electric motor elements, on top of the parts, and a disk-shaped oil separator 10 is fixed on the top of the rotor 8, and a compression mechanism part is filled with lubricating oil 11. ing.

The operation of the 41 hermetic compressor will be described below.

First, the electric motor (shaft 4 which is given rotational motion)
However, due to the cam movement of the eccentric part, the refrigerant gas is compressed, and is partially discharged from the discharge hole 14 of the muffler 12 into the closed container 1, passing through the gap 15 between the closed container 1 and the stator 9, and flowing into the discharge pipe 16. The refrigerant gas is sent out during the refrigeration cycle.

However, at this time, the lubricating oil 11 is pushed up to the seventh part of the shaft 4 through the hole 18 of the shaft 4 by the head of the oil pump 17 provided at the bottom of the shaft 4.
Lubricating oils 11 and 1 flowing out from the upper part of the boss part of the upper end plate 6
The refrigerant mixed with lubricating oil discharged from the discharge hole 14 of the muffler 12 is stirred by the rotor 8, and is discharged from the discharge pipe 16.
It is released during the cycle.

A conventional oil separator is equipped with an oil separator 10 for the purpose of separating lubricating oil released from a shaft hole 17.

Problems to be Solved by the Invention However, in the configuration as described above, the lubricating oil 11 flowing out from the boss portion of the upper end plate 6 is agitated by the rotational action of the rotor 8, and the lubricating oil 11 is converted into compressed gas. Since the oil is carried away and discharged from the discharge pipe 16, it is impossible to reduce the amount of oil flowing out.

The present invention minimizes the release of lubricating oil 11 into the refrigeration cycle due to the above reasons, and
The present invention aims at stabilizing the air conditioner, thereby providing high reliability of the compressor, improving the heat exchange capacity of the refrigeration cycle, and improving the efficiency of the refrigeration cycle.

Means for Solving the Problems and Description: In order to solve the problems, the hermetic rotary compressor of the present invention is provided with an oil stopper above the discharge hole of the upper muffler.

Effects of the present invention With the above configuration, the oil stopper installed above the discharge hole of the upper muffler minimizes the agitation and scattering of the lubricating oil due to the rotation of the rotor. The lubricating oil released from the discharge pipe together with the compressed gas during the refrigeration cycle can be minimized.

EXAMPLE Hereinafter, a hermetic rotary compressor according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a hermetic rotary compressor according to an embodiment of the present invention, and in terms of its basic configuration and operating principle, there is one member that is substantially the same as the conventional compressor explained in FIG. Explanation will be omitted by assigning reference numbers.

In this embodiment, an oil stopper 19 is fixedly provided in the discharge hole of the muffler.

In the t-compressor configured to the north, the lubricating oil flowing out from the boss portion of the upper end plate 6 is agitated by the rotation of the rotor 8, and the oil in this state):! - The oil stopper 19 fixed to the upper muffler 12 can prevent the refrigerant gas from being blown north from the discharge hole 14 of the seven-part muffler 12, and the refrigerant gas discharged from the discharge hole 14 of the upper muffler 12 It is also possible to prevent the lubricating oil inside from being agitated and scattered, and it is possible to minimize the lubricating oil that passes through the discharge pipe 16 together with the compressed gas and is released into the refrigeration cycle.

As described in detail, the hermetic rotary compressor of the present invention includes:
An oil stopper is installed in the discharge hole of the upper flap '7, which prevents the lubricating oil from dissipating due to the rotation of the rotor, suppresses the lubricating oil released into the refrigeration cycle together with the compressed gas, and prevents the inside of the closed container from being dissipated. By keeping the amount of lubricating oil stable, the reliability of the compressor can be improved, the heat exchange capacity of the refrigeration cycle can be improved, and the efficiency of the refrigeration cycle can be increased.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a hermetic rotary compressor according to an embodiment of the present invention, Fig. 2 is a plan view of an upper muffler including an oil stopper in the same compressor, and Fig. 3 is a cross-section of the same muffler. 4 are vertical sectional views showing a conventional hermetic rotary compressor. 1... Airtight container, 2... Cylinder, 3
...Piston, 4...Shaft, 5.
...Blade, 6...Hill end plate, 7...
... lower end plate, 8 ... rotor, 9 ...
...Stator, 1o...Oil separator, 11
......Lubricating oil, 12...Upper muffler, 1
3...Lower muffler, 14...Discharge hole,
15...Gap, 16...Discharge pipe,
17... Oil pump, 18... (shaft) hole, 19... Oil stopper. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

[Claims] An electric motor element is disposed in a closed container storing lubricating oil, and a compressor element driven by the electric motor element is disposed immersed in the lubricating oil, and the compressor element has a cylindrical cylinder wall. a pair of upper end plates that rotatably support a shaft that closes both ends of the cylinder wall and transmits power from the electric motor element;
a lower end plate, an upper muffler and a lower muffler each forming a silencing chamber, a piston that is fixed to a shaft within the cylinder wall and rotates eccentrically, and a blade that abuts the piston and has its other end pressed by a spring. A closed type rotary compressor element having an opening in the outer circumference of the upper part of the discharge hole of the upper muffler of the compressor element, and a disk-shaped cover fixed and integrated with the outer surface of the upper muffler. type compressor.