JP-2026514306-A - Oil-gas separator and cooling system having the same

JP2026514306AJP 2026514306 AJP2026514306 AJP 2026514306AJP-2026514306-A

Abstract

This invention relates to an oil-gas separator and a refrigeration system having the oil-gas separator. The oil-gas separator includes an outer shell, an inner cylinder, an intake pipe, an exhaust pipe, and an oil drain pipe. The outer shell includes an outer cylinder. The inner cylinder is located inside the outer cylinder, and an outer lumen is formed between the outer cylinder and the inner cylinder, with an inner lumen formed inside the inner cylinder. The inner cylinder includes a solid cylinder wall and a pore cylinder wall, the pore cylinder wall is provided with a plurality of pores that connect the outer lumen and the inner lumen, and the solid cylinder wall and the pore cylinder wall are arranged along the circumferential direction of the inner cylinder. The intake pipe is connected to the outer cylinder. The exhaust pipe is connected to the upper part of the outer shell. The oil drain pipe is connected to the bottom of the outer shell. Because the solid cylinder wall and the pore cylinder wall are arranged along the circumferential direction of the inner cylinder, when oil-gas entering the outer lumen undergoes helical motion, it first passes through the solid cylinder wall and then through the pore cylinder wall. This results in a good lubricating oil separation effect and a small pressure drop.

Inventors

周建
呉建国
胡礼琴
周晨亮
陳金紅

Assignees

浙江雪波藍科技有限公司

Dates

Publication Date: 20260508
Application Date: 20240506
Priority Date: 20230506

Claims (15)

An oil-gas separator, The outer shell, including the outer cylinder, An inner cylinder located within the outer cylinder, wherein an outer lumen is formed between the outer cylinder and the inner cylinder, an inner lumen is formed within the inner cylinder, the inner cylinder includes a solid cylinder wall and a pore cylinder wall, the pore cylinder wall has a plurality of pores that connect the outer lumen and the inner lumen, and the solid cylinder wall and the pore cylinder wall are arranged along the circumferential direction of the inner cylinder, An intake pipe connected to the outer cylinder, An exhaust pipe connected to the upper part of the outer shell, The drain pipe connected to the bottom of the outer shell, An oil-gas separator that includes an oil-gas separator.
The oil-gas separator according to claim 1, wherein, in the direction in which the oil-gas entering from the intake pipe flows along the circumferential direction of the inner cylinder, the solid cylinder wall is located downstream of the location of the intake pipe, and the filter hole cylinder wall is located upstream of the location of the intake pipe.
The oil-gas separator according to claim 1, wherein the intake pipe is connected to a projection area in which the solid cylindrical wall is projected radially onto the outer cylinder.
The oil-gas separator according to claim 3, wherein the connection between the intake pipe and the outer cylinder is adjacent to the boundary of the projection area, and a tangent line is drawn on the outer cylinder passing through the connection between the intake pipe and the outer cylinder, with the connection on the outer cylinder as the base point, and this is the first cross-section, and a tangent line is drawn on the inner cylinder passing through the base point, and this is the second cross-section, and the angle between the intake pipe and the first cross-section is ∠C, and the angle between the first cross-section and the second cross-section is α°, such that the angle ∠C is between 0° and α°.
The area occupancy rate of the pore tube wall on the inner cylinder is between 1/4 and 1/2, or The oil-gas separator according to claim 1, wherein the plane to which the two boundary lines between the filter hole cylinder wall and the solid cylinder wall belong is perpendicular to the intake pipe, and the length of the filter hole cylinder wall along the circumferential direction of the inner cylinder is 1/4 to 1/2 of the circumference of the inner cylinder.
The oil-gas separator according to claim 1, wherein the area occupancy rate of the plurality of pores on the wall of the pore tube is 50% to 80%.
The oil-gas separator according to claim 1, wherein multiple pores are uniformly distributed on the wall of the pore tube.
The oil-gas separator according to claim 1, wherein the area occupancy ratio of the plurality of pores on the pore tube wall increases gradually or in steps along the direction of arrangement of the solid tube wall and the pore tube wall.
Multiple pores have the same area, and the number density of pores gradually increases, or The oil-gas separator according to claim 8, wherein the number density of the pores is the same and the opening area of the pores gradually increases.
The oil-gas separator according to claim 1, wherein the width of the filter tube wall changes from top to bottom along the circumferential direction of the inner cylinder.
The width of the pore tube wall at different height positions differs along the circumferential direction of the inner cylinder, and the width of the pore tube wall gradually or stepwise increases from top to bottom, or The oil-gas separator according to claim 10, wherein the width of the filter tube wall gradually or in steps in both upward and downward directions from the connection between the intake pipe and the outer cylinder.
The oil-gas separator according to claim 1, wherein the bottom of the outer cavity and the bottom of the inner cavity are in communication, the upper end of the drain pipe is H1 higher than the bottom end of the outer shell, the distance between the drain pipe and the side wall of the outer shell is H2, and H1:H2 ≥ (√3)/2.
The oil-gas separator according to any one of claims 1 to 12, wherein the pressure drop of the oil-gas separator is 0.3 BAR or less, and the separation rate of lubricating oil in the oil-gas is 90% or more.
A cooling system including a compressor, a condenser, a throttle, and an evaporator, The cooling system further includes an oil-gas separator according to any one of claims 1 to 13, wherein the oil-gas separator is provided between the compressor and the condenser, and the intake pipe communicates with the outlet of the compressor, the exhaust pipe communicates with the inlet of the condenser, and the oil drain pipe communicates with the inlet of the compressor.
A cooling system comprising a first compressor, a second compressor, a condenser, a throttle device, and an evaporator, The cooling system further comprises two oil-gas separators according to any one of claims 1 to 13, one of which is provided between the first compressor and the second compressor, with an intake pipe communicating with the outlet of the first compressor, an exhaust pipe communicating with the inlet of the second compressor, and an oil drain pipe communicating with the inlet of the first compressor; and the other oil-gas separator is provided between the second compressor and the condenser, with an intake pipe communicating with the outlet of the second compressor, an exhaust pipe communicating with the inlet of the condenser, and an oil drain pipe communicating with the inlet of the second compressor.

Description

This application relates to the field of cooling technology, and more particularly to oil-gas separators and cooling systems having the same. A vapor compression cooling system includes four main components: the compressor, condenser, throttle, and evaporator. Based on the lubrication method, compressors are classified into oil-free compressors and lubricated oil compressors. In lubricated oil compressors, the lubricating oil not only reduces friction and wear of the machine but also plays a role in sealing, cooling, and reducing operating noise. Good lubrication conditions are a crucial guarantee for the long-term reliable operation of the compressor. However, during compressor operation, lubricating oil is discharged from the compressor along with the refrigerant. If the oil cannot be returned in a timely manner, it can lead to malfunctions such as compressor oil shortage, shaft seizure, or burnout. On the other hand, if lubricating oil enters the heat exchanger along with the refrigerant, it can affect heat exchange efficiency. To solve the above technical problems, it is necessary to provide an oil-gas separator and a cooling system having the same. To solve one of the above technical problems, the present invention employs the following technical solution. One is an oil-gas separator, comprising an outer shell, an inner cylinder, an intake pipe, an exhaust pipe, and an oil drain pipe. The outer shell includes an outer cylinder. The inner cylinder is located within the outer cylinder, with an outer lumen formed between the outer cylinder and the inner cylinder, and an inner lumen formed within the inner cylinder. The inner cylinder includes a solid cylinder wall and a pore cylinder wall, the pore cylinder wall having a plurality of pores connecting the outer lumen and the inner lumen, and the solid cylinder wall and the pore cylinder wall are arranged along the circumferential direction of the inner cylinder. The intake pipe is connected to the outer cylinder. The exhaust pipe is connected to the upper part of the outer shell. The oil drain pipe is connected to the bottom of the outer shell. Another is a cooling system comprising a sequentially connected compressor, condenser, throttle, and evaporator, the cooling system further comprising one of the above-mentioned oil-gas separators, the oil-gas separator being located between the compressor and the condenser, with an intake pipe communicating with the compressor outlet, an exhaust pipe communicating with the condenser inlet, and an oil drain pipe communicating with the compressor inlet. Another component is a cooling system comprising a sequentially connected first compressor, second compressor, condenser, throttle, and evaporator, further comprising any two oil-gas separators. One oil-gas separator is located between the first and second compressors, with an intake pipe communicating with the outlet of the first compressor, an exhaust pipe communicating with the inlet of the second compressor, and an oil drain pipe communicating with the inlet of the first compressor. The other oil-gas separator is located between the second compressor and the condenser, with an intake pipe communicating with the outlet of the second compressor, an exhaust pipe communicating with the inlet of the condenser, and an oil drain pipe communicating with the inlet of the second compressor. Compared to conventional technology, the beneficial effects of the present invention are as follows: In the oil-gas separator of the present invention, since the solid cylinder wall and the filter hole cylinder wall are arranged along the circumferential direction of the inner cylinder, when the oil-gas entering the outer lumen undergoes helical motion, it first passes through the solid cylinder wall and then the filter hole cylinder wall. Therefore, the separation effect of lubricating oil is good, and the pressure drop is small. Figure 1 is a schematic diagram of the structure of an oil-gas separator according to a preferred embodiment of the present invention.Figure 2 is an exploded view of Figure 1.Figure 3 is a schematic diagram of Figure 1 from a different angle.Figure 4 is a cross-sectional view along the A-A direction in Figure 3.Figure 5 is a cross-sectional view along the B-B direction in Figure 3.Figure 6 is a schematic diagram of the structure of the intake pipe in Figure 1.Figure 7 is a schematic diagram of the inner cylinder structure in Figure 1.Figure 8 is a schematic diagram of the combination of the intake pipe, outer cylinder, and inner cylinder as shown in Figure 1.Figure 9 is a schematic diagram of the combination of the intake pipe, outer cylinder, and inner cylinder in another embodiment.Figure 10 is a schematic diagram of the combination of the intake pipe, outer cylinder, and inner cylinder in another embodiment.Figure 11 is a schematic diagram of the combination of the intake pipe, outer cylinder, and inner cylinder in another embodiment.Figure 12 is a schematic