Rotary compressor

Details Rotary compressor Rotary compressor

1998-02-10

2001-06-26

Denion, Thomas (Department: 3748)

Rotary expansible chamber devices

Working member has planetary or planetating movement

With relatively movable partition member

C418S083000, C418S092000

Reexamination Certificate

active

06250899

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a rotary compressor, and more particularly to a rotary compressor equipped with sealing means in a vane for preventing leakage and influx of gas through a gap between a cylinder and the vane.
In a conventional rotary compressor for refrigeration, as shown in
FIG. 1
, the inside space of a cylinder
1
is divided into an inlet space and a compression space by a roller
3
and a vane
6
. Refrigerant gas in the compression space is compressed by the roller
3
and the vane
6
operating as a movement of an eccentric shaft
2
, while new refrigerant gas continually gets into the inlet space through an inlet port
5
. The compressed gas in the compression space is discharged to the outside space of the cylinder
1
through an outlet port
4
, whereby pressure between the cylinder and a case (not illustrated) becomes high. The case isolates the outside space of the cylinder
1
from the atmosphere. The vane
6
moves up and down in a slot
8
and is pushed onto the roller
3
by the outside pressure of the cylinder
1
and by the spring
7
connected to the upper side of the vane
6
. The outside pressure of the cylinder is higher than the inside pressure of the cylinder except when the gas is discharged into the outside of the cylinder.
In the above-mentioned rotary compressor, as shown in the
FIG. 2
, the pressure difference between the inside and outside of the cylinder is liable to cause leakage of the inside gas into the outside of the cylinder and influx of the outside gas into the inside of the cylinder through a gap between the vane and the cylinder, worsening the efficiency of the rotary compressor.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an improved rotary compressor by preventing the leakage and influx of gas through a gap between the cylinder and the vane.
The present invention provides a rotary compressor which comprises a cylinder having a slot, an eccentric shaft disposed in the inside of the cylinder, a roller formed around the eccentric shaft, a vane inserted into the slot and having at least one groove on surface thereof, and sealing means inserted into the groove. The sealing means is made of ceramic, fluorocarbon polymer or metal such as aluminum, brass, or iron.


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