JPH05280484A - Sealed type rotary compressor - Google Patents

Abstract

PURPOSE:To improve the supercharge effect without increasing the pressure loss of the sucked coolant gas by installing two suction holes for introducing the low pressure coolant into the cylinder of the compression element in a sealed container, on the cylinder. CONSTITUTION:Two suction holes 10 and 11 are formed on a cylinder 7, and the coolant gas separated into two directions by two pipes 3 and 4 in a gas/ liquid separator 1 is introduced into the compression chamber in the cylinder by two suction holes 10 and 11 which are constituted of the reepective pipes in the cylinder 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic rotary compressor for compressing a refrigerant gas in a refrigeration system or an air conditioner.

[0002]

2. Description of the Related Art This is based on that disclosed in Japanese Patent Publication No. 64-87892.

The rotary compressor already proposed is shown in FIG. In FIG. 2, the closed container 16 is composed of an electric element and a compression element, and the compression element includes a main bearing 17 and a sub bearing 18.
The cylinder 19 is sandwiched between the compression chamber 20 and the compression chamber 20. The refrigerant is completely vaporized by the gas-liquid separator 21.
The piston 26 in the compression chamber 20 is eccentrically rotationally moved by the shaft 25 connected to the rotor 24 of the motor of the electric element to compress and pressurize the low pressure refrigerant gas. It has a mechanism.

[0004]

However, in the case of the above-mentioned conventional suction system, the suction pipe is a single pipe,
Since the inner diameter is large, the supercharging effect cannot be obtained. When the inner diameter is reduced, the supercharging effect is improved, but the pressure loss is increased.

An object of the present invention is to improve the supercharging effect without increasing the pressure loss.

[0006]

In order to solve the above-mentioned problems, the present invention relates to a cylinder of a compression element in a closed container,
The cylinder has two suction ports for introducing the low-pressure refrigerant.

[0007]

According to the present invention, by providing two suction ports for introducing the low-pressure refrigerant in the cylinder of the compression element in the closed container, the supercharging effect can be achieved without increasing the pressure loss of the suction refrigerant gas. It is possible to improve.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hermetic rotary compressor according to an embodiment of the present invention will be described below with reference to the drawings.

The present invention is one in which the gas-liquid separator of the conventional two-cylinder rotary compressor shown in FIG. 3 is attached to the conventional one-cylinder rotary compressor shown in FIG.

In FIG. 1, the gas-liquid separator 1 has two pipes 3 and 4 connected to the closed container 2 of the hermetic rotary compressor inside the gas-liquid separator 2. This gas-liquid separator 1 completely vaporizes the low-pressure refrigerant sucked through the suction pipe 5, and liquidizes it in a compression chamber 9 formed by a main bearing 6, a cylinder 7, and a sub-bearing 8 which are compression elements in a closed container. It prevents the refrigerant from inhaling and prevents liquid compression. Further, the cylinder 7 is provided with two suction holes 10 and 11 for guiding the low pressure refrigerant gas from the gas-liquid separator to the compression chamber. The two tubes 3 and 4 in the gas-liquid separator 1 are the outer suction tube 1
It is inserted into liners 14 and 15 which are press-fitted into two suction holes 10 and suction holes 11 in the cylinder 7 from Nos. 2 and 13, and fixed by brazing.

With such a structure, in the hermetic rotary compressor, the inner diameter of one suction hole can be made smaller without increasing the pressure loss, and the position of the suction hole is compressed to the suction chamber as compared with the conventional case. Since it can be provided near the vane that separates from the chamber, the supercharging effect due to the suction of the refrigerant gas can be improved.

[0012]

As is apparent from the above description, the present invention provides two suction ports for introducing low-pressure refrigerant in the cylinder of the compression element in the closed container.
The supercharging effect can be improved without increasing the pressure loss of the suctioned refrigerant gas.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a hermetic rotary compressor in which a cylinder is provided with two suction holes for refrigerant gas according to an embodiment of the present invention.

FIG. 2 is a sectional view illustrating a conventional one-cylinder hermetic rotary compressor.

[Explanation of symbols]

 1 Gas-Liquid Separator 2 Airtight Container 3 Tube 1 4 Tube 2 5 Suction Tube 6 Main Bearing 7 Cylinder 8 Sub Bearing 9 Compression Chamber 10 Suction Hole 1 11 Suction Hole 2 12 Suction Outer Tube 1 13 Suction Outer Tube 2 14 Liner 1 15 Liner 2 16 Airtight container 17 Main bearing 18 Sub bearing 19 Cylinder 20 Compression chamber 21 Gas-liquid separator 22 Inner tube 23 Suction passage 24 Rotor 25 Shaft 26 Piston

Claims (1)

[Claims] 1. A compression element driven by a drive element having an electric motor in a closed container, a cylinder, a shaft rotated by the drive element and having an eccentric portion, and rotatably provided on the eccentric portion. And a rolling piston that eccentrically rotates in the cylinder together with an eccentric portion of the shaft, and a compression chamber is formed by sandwiching the cylinder from above and below,
An upper and lower bearing that supports the shaft, a vane that is slidably inserted into the cylinder and partitions the compression chamber and the suction chamber, and an elastic body that presses the vane against the rolling piston.
A suction port for introducing the refrigerant to be compressed, a discharge port for discharging the compressed refrigerant, and a discharge valve device for opening and closing the discharge port are respectively provided, and a fastening portion for connecting the compression elements is further provided. A hermetic rotary compressor in which two suction ports for introducing a refrigerant are provided in the cylinder of the compression element in the hermetic container.