JPS62131993A - Closed type rotary compressor - Google Patents

Abstract

PURPOSE:To hold down lubricating oil which is released into a refrigerating cycle together with compressed gas and stabilize the lubricating oil inside of a receptacle, by providing an oil stopper fixed to the closed receptacle for the upper part of a blade sliding portion so as to prevent the scattering of the lubricating oil by means of the slide of a blade. CONSTITUTION:An oil stopper 18 which has the gap of several mm so as to cover the upper portion of the sliding portion of a blade 5 is fixedly disposed to a closed receptacle 1. With this construction, lubricating oil 11 behind the blade 5 is stirred by the slide of the blade 5, and its upward scattering can be prevented by the oil stopper 18 fixed to the closed receptacle 1. As this result, the lubricating oil is restrained from releasing into a refrigerating cycle and the quantity of the lubricating oil inside of the closed receptacle 1 is kept stably, so that the reliability of a compressor is improved, the heat exchange ability of the refrigerating cycle is improved, and the high efficiency of the refrigerating cycle can be achieved.

Description

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

BACKGROUND OF THE INVENTION In recent years, oil separation devices for closed 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 the hermetic rotary compressor mentioned above will be described below with reference to the drawings. Third
The figure shows an oil separation device for a conventional hermetic rotary compressor.

In the same figure.

A cylinder 2, a piston 3, an eccentric part, a compression mechanism part of a plate 7, and a rotor 8, which is an electric motor element, are placed in a closed container 1.
, a stator 9, a disc-shaped oil separator 10 fixed to the upper part of the rotor 8, and a compression mechanism section filled with lubricating oil 11.

The operation will be explained below.

First, the shaft 4, which is given a rotational motion by an electric motor, compresses the refrigerant gas by the cam movement of the eccentric part and discharges it to the discharge boat 12.
The refrigerant gas is discharged into the sealed container 1, passes through the gap 13 between the sealed container 1 and the stator 9, and the gap 14 between the rotor 8 and the stator 9, and is sent out from the discharge pipe 15 into the refrigeration cycle. However, at this time, the lubricant 11 is pushed up to the top of the shaft 4 through the hole 17 of the shaft 4 by the head of the oil pump 16 provided at the bottom of the shaft 4, and the lubricant is stirred and scattered by the sliding movement of the blade 5. Oil 11 is discharged together with refrigerant gas from discharge pipe 15 during the cycle.

A conventional oil separator generally includes an oil separator 10 installed for the purpose of separating lubricating oil released from a shaft hole 17.

Problems to be Solved by the Invention However, with the above configuration, no countermeasures are taken against the lubricating oil 11 scattered by the agitation of the blade 5 being carried away by the compressed gas and released from the discharge pipe 15. The problem was that it was not done properly.

The present invention minimizes the release of the lubricating oil 11 into the refrigeration cycle due to the above-mentioned reasons, and improves the lubricating oil 11 in the closed container 1.
The objective is to stabilize the refrigeration cycle and bring about high reliability of the compressor, and also to improve the heat exchange capacity of the refrigeration cycle and improve the efficiency of the refrigeration cycle.

Means for Solving the Problems In order to solve the above problems, the hermetic rotary compressor of the present invention has an oil stopper fixed to the airtight container above the blade sliding portion.

Function: With the above configuration, the lubricating oil on the back of the blade is agitated and scattered by the sliding of the blade, and the oil stopper installed on the upper part of the blade slide minimizes the amount of lubricating oil at the back of the blade.
The lubricating oil is prevented from being caught up in the compressed gas, and the amount of lubricating oil discharged from the discharge pipe into the refrigeration cycle along with the compressed gas can be minimized.

Example Below, regarding a hermetic rotary compressor according to an example of the present invention,
This will be explained with reference to the drawings.

FIG. 1 shows a hermetic rotary compressor according to an embodiment of the present invention, and its basic configuration and operating principle are the third type.
Components that are substantially the same as the conventional components explained in the drawings are given the same reference numerals and their explanation will be omitted. However, an oil stopper 18 with a large gap is fixedly provided in the closed container 1 so as to cover the upper part of the sliding part of the blade 5.

In the compressor configured as described above, the oil stopper 18 fixed to the airtight container can prevent the lubricating oil 11 on the back of the blade 5 from being agitated and scattered upward by the sliding of the blade 5. It becomes possible to minimize the amount of lubricating oil 11 that passes through 15 and is released into the refrigeration cycle.

As described in detail, the hermetic rotary compressor of the present invention is provided with an oil stopper fixed to a sealed container above the blade sliding portion, which prevents lubricating oil from scattering due to blade sliding. By suppressing the lubricating oil released into the refrigeration cycle together with the compressed gas and keeping the amount of lubricating oil stable inside the sealed container, the reliability of the compressor is improved, the heat exchange capacity of the refrigeration cycle is improved, and the refrigeration cycle is improved. It is possible to achieve high efficiency.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of a hermetic rotary compressor according to an embodiment of the present invention, Fig. 2 is a perspective view of the main parts of the same compressor, and Fig. 3 is a longitudinal cross-sectional view of a conventional hermetic rotary EEB machine. It is a front view. 1...Airtight container, 2...Cylinder, 3
...Piston, 4...Shaft, 5.
...Blade, 6...Top end plate, 7...
... lower end plate, 8 ... rotor, 9 ...
... Stator, 10 ... Oil separator, 1
1...Lubricating oil, 12...Discharge hole, 13
... airtight container, gap between 1 and stator 9, 14.
...Gap between stator 9 and rotor 8, 15...
...Discharge pipe, 16...Oil pump, 17
...Shaft hole, 18...Oil stopper 0 Agent's name Patent attorney Satoshi Nakao and 1 other person/-
-Ichigo Closed Port 2--Sisonder 4--Shaft 18--1 Oil Nut Hair- Fig. 3 Puff 1 B

Claims (1)

[Claims] A motor element is disposed in a closed container storing lubricating oil, and a compression element driven by the motor element is disposed immersed in the lubricating oil, and the compressor element is arranged in a cylinder having a cylindrical cylinder wall. a main body, a pair of upper and lower end plates that block both ends of the cylinder wall and rotatably support a shaft that transmits power from the electric motor element; and an eccentric plate that is fixed to the shaft within the cylinder wall. A closed rotary compressor comprising a rotating piston and a blade that contacts the piston and has its other end pressed by a spring, and has an oil stopper fixed to a closed container above the sliding blade.