JPS6229790A - Closed type rotary compressor - Google Patents

Abstract

PURPOSE:To prevent the lubricating oil blown up by the reciprocating motion of a blade from flowing out into a refrigerating cycle by arranging an oil stopper on the upper side of the blade being in contact with the circumferential surface of a piston. CONSTITUTION:In a cylinder 2, a sliding groove for a blade 5 which is in contact with the circumferential surface of a rolling piston and performs a reciprocating motion is formed. And, an oil stopper 18 extending from the upper end plate 6 of a compression mechanism part is arranged on the upper side of the sliding groove for the blade 5. Thus, even if the blade 5 immersed in the lubricating oil within a closed vessel 1 blows up lubricating oil upward by the reciprocating motion thereof, the lubricating oil is returned to an oil reservoir 11 below by th oil stopper 18, and accordingly the lubricating oil is prevented from being mixed into refrigerating gas to be flowed out into an external refrigerating cycle.

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.

No. 31/ shows an oil separation device for a conventional hermetic rotary compressor.

In FIG. 3, compression mechanism parts include a cylinder 21 and a piston 3 in a closed container 1, a shaft 4 having an eccentric part, a blade 5 separating the high pressure side and the low pressure side, an upper end plate 6 supporting the shaft 4, and a lower end plate 7. A rotor 8 and a stator 9, which constitute electric motor elements, are provided on the upper part of the rotor, and a disk-shaped oil separator 10 is fixed to the upper part of the rotor. The compression mechanism section is filled with lubricating oil 11.

First, the shaft 4, which is given multiple rotational motion by the electric motor, compresses the refrigerant gas by the cam movement of the eccentric part, and the discharge port 1
Refrigerant gas is discharged from 2 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 into the refrigeration cycle through the discharge pipe 15. .

However, at this time, the lubricating oil 11 is pushed up to the upper part 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 lubricating oil is pushed up by the sliding movement of the blade 5. 11 is scraped up, and this lubricating oil 11 is discharged from the discharge pipe 15 during the cycle together with the refrigerant gas.

Conventional oil separation equipment 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, in the above configuration, no countermeasures are taken against the lubricating oil 11 that is stirred up by the blade 5 and is carried away by the compressed gas and released from the discharge pipe 15. The problem was that this was not taken into account.

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.
This provides stabilization of the compressor, brings about high reliability of the compressor, and improves the heat exchange capacity of the refrigeration cycle, thereby improving 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 is provided with an oil stopper located above the sliding portion of the blades.

Function: With the above-described configuration, the lubricating oil on the back of the blade is agitated and blown up by the sliding of the blade, which is minimized by the oil stopper installed on the upper part of the blade sliding part, and the lubricating oil is compressed. Avoid getting caught in the gas,
This makes it possible to minimize the amount of lubricating oil released from the discharge pipe into the refrigeration cycle together with the compressed gas.

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 sectional view of a hermetic rotary compressor according to an embodiment of the present invention, and its basic configuration and operating principle are substantially the same as the conventional compressor explained in FIG. The explanation will be omitted by giving the same reference numerals to the members. However, an oil stopper 18 is provided which covers the upper part of the sliding part of the blade 5 with a part of the flange part of the upper end plate 127 and has a gap of several n.

In the compressor configured as above, the lubricating oil 11 on the back of the blade 5 is stirred by the sliding of the blade 5,
The oil stopper 18 shared with the upper end plate 6 can prevent the lubricating oil from jumping upward, and it is possible to minimize the amount of lubricating oil 11 released into the nine refrigeration cycles through the discharge pipe 15 along with the compressed gas. become.

As described in detail, the hermetic rotary compressor of the present invention includes:
An oil stopper is provided above the blade sliding part to prevent the lubricant from flying up due to the sliding of the blade, and to suppress the lubricant released into the refrigeration cycle along with the compressed gas, thereby reducing the lubricant inside the closed container. By keeping the amount stable, improving the reliability of the compressor, and improving the heat exchange capacity of the refrigeration cycle, it is possible to increase the efficiency of the refrigeration cycle. Further, by making the oil stopper an integral structure of the upper end plate, the number of parts can be reduced and assembly can be facilitated.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a compressor in an embodiment of the present invention;
FIG. 2 is a perspective view of a compression mechanism in the same compressor, and FIG. 3 is a south vertical section showing a conventional hermetic rotary compressor. 1... Density Vr volume Fjt, 2... Cylinder, 3... Piston, 4... Shaft, 5... Blade, 6... ...Top end plate,
7... lower end plate, 8... rotor, 9...
... Stator, 11 ... Lubricating oil, 12 ...
...Discharge hole, 15...Discharge pipe, 16.
...Oil pump, 17...Shaft hole, IB=-Oil stopper. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
--Sealed welding 52---Sissonda 3-1-Piston 6-Yoone p end plate 7-Lower ST5g, handling? ---Shilling cow-11-/Ift 5--7 Shiichido Figure 2 6= Upper joint plate 7- Lower stand p plate 18--1 Oil stopper Figure 3

Claims (2)

[Claims] (1) An electric motor element is disposed in a closed container storing lubricating oil, and a compression element driven by the electric motor element is disposed immersed in the lubricating oil, and the compressor element is
a cylinder body having a cylindrical cylinder wall; a pair of upper and lower end plates that close both ends of the cylinder wall and rotatably support a shaft that transmits power from the electric motor element; and the cylinder wall. A closed rotary rotary motor, which is composed of a piston that is fixed to a shaft and rotates eccentrically within the shaft, and a blade that is in contact with the piston and whose other end is pressed by a spring, and that an oil stopper is provided on the sliding upper part of the blade. type compressor. (2) The hermetic rotary compressor according to claim 1, wherein an oil stopper is formed by extending one end of the upper end plate.