JPS5939991A - Rotary compressor - Google Patents

Abstract

PURPOSE:To enhance the performance of a compressor by circulating the lubricating oil through an exchanger outside the enclosed vessel back to it with heat radiation during passage of the outside, sinking the temp. of the whole compressor, suppressing the preheating of suction gas, and by enhancing the lubricating performance. CONSTITUTION:The gas discharged from a compression chamber 11 is fed into the lubricating oil supply end 17a of an oil supply pipe 17 from the foremost discharge end 16a of the discharge pipe 16. Here the lubricating oil 19 stagnating at the bottom of the enclosed vessel 1 is sucked into the oil supply pipe 17 from a gap A formed at the overlapping part of these two, to be sent out of the discharge pipe 16 together with injection gas to a heat exchanger 18 located outside the enclosed vessel 1, and then fed again into this vessel 1. Thus the oil 19 at the bottom of vessel 1 circulates while radiating its heat given from compression element 3 etc. through thermal conduction, so that the temp. of the whole compressor sinks to assure suppression of the preheating of suction gas. Thus the sealing, lubricating and compressing performances are enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to rotary compressors, and more particularly to improvements in their performance and reliability.

Conventional compressors, especially those with large capacity,
While the amount of heat generated from the compression elements increases, the amount of heat dissipated does not increase accordingly, resulting in an increase in the temperature of the entire compressor.

This not only preheats the intake gas, reduces the sealing performance of the lubricating oil, and reduces the efficiency of the electric motor, but also reduces performance.
This resulted in a decrease in reliability, such as a decrease in the lubricating oil's ability to retain an oil film and deterioration of the motor stand insulation material. For this reason, to increase the amount of heat dissipation.

Although measures such as oil coolers were used.

In conventional oil coolers, a portion of the refrigerant circuit is drawn into a sealed container, which makes piping and assembly within the sealed container and on the side of the compressor unit complicated, resulting in increased costs.

The present invention aims to improve these points and provide a compressor that is easy to assemble and has improved performance and reliability.Examples of the present invention will be described below with reference to the drawings.

(1) is an airtight container, +2131 is an electric motor, a motor section, and a compression element housed in this airtight container, and (7) is a crankshaft driven by this electric motor section (2) and the like. The compression element (3) includes a piston (8) fitted on the crankshaft, a vane (not shown) that reciprocates with one end in contact with the piston, and a vane (not shown) that reciprocates with one end of the piston in contact with the piston. It consists of an end bearing (51 (6)) and a cylinder (4) between them, and the inside of this cylinder is divided into a high pressure chamber and a low pressure chamber for the refrigerant by the vane, as is well known, and the eccentricity of the crankshaft (7) is The rotation causes the suction and discharge of refrigerant to be repeated.

The refrigerant gas compressed in this way passes through the discharge valve port 3 provided in the main bearing (5) and is discharged into the discharge side muffling chamber α outside of the discharge valve port 3. α9 is the main, end bearing (5) (6)
and a gas hole passing through the cylinder (4) between them.

Oe is the discharge pipe whose fixed end is inserted into this gas hole.

The gas discharge end (16a) at the other end is connected to the closed container (1).
It is opened in the oil guide pipe α9 which is opened in the lubricating oil 01 inside. Further, this oil supply pipe opens into the closed container (1) again through the heat exchanger 0 barrel outside the closed container.

Therefore, the dregs discharged from the compression chamber is discharged from the distal end (16a) of the discharge pipe 00 into the lubricating oil supply end (17a) of the oil supply pipe α7j. At this time, the lubricating oil 01 accumulated at the bottom of the closed container (1) is sucked into the oil supply pipe α force through the gap (A) formed in the overlapped portion of both of them, and the injected gas from the discharge pipe 00 with a heat exchanger outside the perforated container 0
It is sent to the chair and then into the sealed container (1) again.

This is because the present invention is configured as described above.

The lubricating oil at the inner bottom of the closed container circulates without radiating heat, and the heat transmitted from the compression elements of the electric motor continues to be radiated. In this way, the temperature of the entire compressor, including the compression elements and oil, decreases, suppressing preheating of the intake gas and improving the sealing performance of the lubricating oil.

etc., not only improves the performance of the compressor.

It also has a significant effect on reliability, such as improved lubrication performance.

[Brief explanation of the drawing]

FIG. 1 shows 1f'Ji 'f of a rotary compressor according to the present invention.
f11 figure. Figure 2 is Figure 1, with the main parts of Figure 1 cut away. In the figure, (1) is a closed container, (3) is a compression element, (4) is a cylinder, (5) is a main bearing, (6) is an end bearing, and (7) is a crankshaft. (8) is the piston, (+11 is the compression chamber, Oe is the discharge pipe, OD is the oil supply pipe, θ (to) is the heat exchanger, and al is the lubricating oil. Agent Shin Kuzuno - Child 1 Figure

Claims (3)

[Claims] (1) A compression chamber is formed by surrounding the main bearing and the end bearing at both ends of the cylinder, and a piston is eccentrically rotated within this compression chamber by a crankshaft, and a vane that presses one end of the piston is used to divide the compression chamber into a high-pressure chamber and a low-pressure chamber. A rotary type in which a compression element is divided into chambers, and this compression element is housed in a closed container that serves as a high-pressure space, and the sliding parts of the compression element are lubricated with lubricating oil stored in the inner bottom of this closed container. 1. A rotary compressor, characterized in that the lubricating oil is returned into the container through an honor exchanger located outside A' of the closed container. (2) The oil supply end of the oil supply pipe to the heat exchanger is opened in the lubricating oil in the sealed container, and the discharge gas from the compression chamber is injected into this open end. A rotary compressor according to claim 1. (3) Claims 1 and 2 in which the tip of the discharge pipe is inserted into the oil supply pipe that opens into the lubricating oil in the sealed container, and an oil attraction gap is formed between the oil supply pipe and the discharge pipe. The rotary compressor described in Section 1.