Oil-gas separation component and scroll compressor

Abstract

The present invention relates to the field of scroll compressors, specifically an oil-gas separation assembly and a scroll compressor, wherein the scroll compressor includes a first exhaust port, an air intake unit, a separation unit, and an exhaust pipe, wherein the air intake unit is connected to the first exhaust port and communicates with the separation unit through the air intake pipe, and the cross-sectional area of ​​the air intake pipe is smaller than the cross-sectional area of ​​the first exhaust port; the inner wall cross-section of the separation unit is circular, and a concentric guide core with a circular outer wall cross-section is provided inside the separation unit; the exhaust pipe is arranged along a first direction and is coaxial with the guide core, and the end of the exhaust pipe extends in the first direction to the interior of the separation unit and forms an oil discharge channel together with the inner wall of the separation unit. The present invention greatly improves the purity of the compressed gas when it is discharged by providing at least three oil-gas separations, reducing the difficulty and cost of subsequent processing.

Description

Technical Field

[0001] The present invention relates to the technical field of scroll compressors, and in particular to an oil-gas separation component and a scroll compressor. Background Art

[0002] Conventional scroll compressors, as efficient and reliable compression equipment, primarily consist of a casing and compression elements. The casing not only protects the entire compressor but also supports and secures the internal components. Inside, a high-pressure chamber is designed to receive and temporarily store compressed gas, ensuring its stability before discharge.

[0003] The compression component, the "heart" of a scroll compressor, consists of an orbiting scroll and a stationary scroll, precisely mated together. The relative motion of these two scrolls is the core mechanism of the compressor's operation. Through complex orbital motion, they gradually compress the gas entering the compressor. During operation, the orbiting scroll, driven by the driving force, rotates eccentrically, meshing with the stationary stationary scroll to form a series of gradually shrinking enclosed volumes. Within these enclosed volumes, the gas is continuously compressed until the desired pressure level is reached, after which it is discharged into the high-pressure chamber within the outer casing.

[0004] However, scroll compressors face unprecedented challenges when transporting and compressing specialized gases, such as helium. Due to its unique physical properties, helium generates high temperatures during the compression process. This high temperature makes it easier for lubricants, moisture, and other impurities to dissolve in the compressed, high-pressure gas. The influx of these impurities not only significantly reduces the purity of the helium but can also negatively impact its subsequent applications.

[0005] Cryogenic pump systems, in particular, require extremely high helium purity. If the oil mist generated during compression isn't effectively removed, it can solidify at low temperatures during transportation, forming solid particles. These particles can not only clog pipelines but also damage critical equipment like the pump, seriously impacting system operation and stability.

[0006] To address this challenge, existing technologies typically employ additional filtration devices to purify compressed helium. These filtration devices employ multi-stage filtration and the addition of adsorbers to minimize impurities in the gas. However, this approach is not perfect. Filters require regular replacement and maintenance, which not only increases compressor operating costs but also places an additional burden on routine maintenance.

[0007] In addition, technicians in this field are also constantly exploring more efficient oil and gas separation technologies. For example:

[0008] Patent No. CN202411571571.0 proposes an oil-gas separation assembly and scroll compressor design. The core concept is to install an exhaust pipe in the exhaust direction of the exhaust port. This utilizes the collision of the exhaust gas with the exhaust pipe during discharge, as well as the rotational flow around the outer wall of the exhaust pipe, to achieve separation of oil and gas through centrifugal force. However, it has certain limitations in practical application.

[0009] Specifically, in the design, when the mixed gas is discharged, it will first rotate around the outer wall of the exhaust pipe 3 and move in a certain direction (such as the opposite direction of S1); then, the mixed gas needs to change direction and move in the opposite direction (the forward direction of S1) so that it can enter the exhaust pipe 3 and be discharged.

[0010] During this process, 1. The compressed gas is in centrifugal motion and should rotate along the inner wall of a certain structure, but cannot rotate around the outer wall of the exhaust pipe 3 for a long distance; 2. The direction of the compressed gas changes 180 degrees. This drastic change in direction will cause the gases to collide with each other, forming turbulence, thereby affecting the movement trajectory of the mixed gas around the exhaust pipe. The generation of turbulence will weaken the centrifugal force's separation effect on oil and gas, thereby reducing the oil and gas separation effect; 3. When the compressed gas is discharged, the flow area increases sharply, achieving a certain oil and gas separation effect. However, the collision pressure with the outer wall of the exhaust pipe 3 decreases rapidly, and it is impossible to form effective centrifugal force inertia for separation; 4. The collision of the compressed gas with the outer wall of the exhaust pipe 3 will produce oil mist, and the continuous entry of compressed gas will cause the oil mist to mix back, further reducing the separation effect.

[0011] Patent No. CN201822006088.4 provides an exhaust device and compressor for a horizontal scroll compressor. It proposes a compressor oil-gas separation device that separates oil and gas by providing a miscibility chamber in the pipeline to change the flow rate of the mixed gas, thereby achieving separation. The original intention of this design is to achieve separation by utilizing the changes in the flow direction and flow rate of the mixed gas during transmission in the pipeline. However, in practical application, this solution also has some shortcomings.

[0012] When a gas mixture is transported through a pipeline, its contact area with the pipe wall is relatively limited, even at bends. Most of the gas flows directly through the pipe into the miscibility chamber, and the bends in the pipe also reduce the flow rate of the gas mixture to a certain extent. Once the gas mixture enters the miscibility chamber, it forms a straight jet, and the change in flow rate can achieve a certain separation effect. However, due to the limitations of contact area and flow rate change, this separation effect is relatively limited, making it difficult to meet the requirements for efficient oil and gas separation.

[0013] Patent No. CN202223123746.0 provides an oil-gas separation structure and heat pump compressor. This design achieves oil-gas separation by installing a first oil-gas separation tube and a second oil-gas separation tube, and adjusting the angle and height of the two tubes. This design utilizes the collision and flow rate changes of the mixed gas between the two tubes to achieve separation. However, this solution also has limitations.

[0014] The oil in the first oil separation tube falls to the oil return section simply by gravity, with very little inertia, while the gas velocity is very high. The oil and gas on the tube wall are easily mixed again. Therefore, the oil-liquid and gas separation efficiency of this solution is relatively limited, and it is difficult to meet the needs of high-precision and high-efficiency oil and gas separation.

[0015] In summary, while these patents propose some innovative oil-gas separation solutions, they still have limitations and deficiencies in practical applications. Therefore, improving the oil-gas separation efficiency of compressors, ensuring the purity of specialized gases and enabling smooth subsequent applications, has become a critical issue that needs to be addressed by those skilled in the art. Summary of the Invention

[0016] The purpose of the present invention is to provide an oil-gas separation component and a scroll compressor to solve the problem in the prior art that the oil-gas separation efficiency is low, which affects the purity of special gases and the smooth progress of subsequent applications.

[0017] The technical solution of the present invention is: an oil-gas separation assembly for a scroll compressor, the scroll compressor including a first exhaust port, an air intake unit, a separation unit and an exhaust pipe, the air intake unit is connected to the first exhaust port and communicates with the separation unit through the air intake pipe, and the cross-sectional area of ​​the air intake pipe is smaller than the cross-sectional area of ​​the first exhaust port;

[0018] The inner wall section of the separation unit is circular, and a concentric flow guide core with an outer wall section of a circle is provided inside the separation unit;

[0019] The exhaust pipe is arranged along the first direction and is coaxial with the guide core. The end of the exhaust pipe extends into the interior of the separation unit in the first direction and forms an oil discharge channel together with the inner wall of the separation unit.

[0020] There is a gap between one end of the exhaust pipe close to the guide core and the guide core; the projection of the end of the guide core close to the exhaust pipe on the end surface of the exhaust pipe completely covers the exhaust pipe.

[0021] Preferably, the guide core and the separation unit together form a separation cavity; in the first direction, the closer to the gap, the smaller the cross-sectional area of ​​the separation cavity.

[0022] Preferably, in the first direction, the air intake channel formed by the air intake pipe does not exceed the plane where the end of the guide core close to the exhaust pipe is located.

[0023] Preferably, the air intake direction of the air intake pipe to the separation unit is tangent to the inner wall of the separation unit, and the incoming gas has both a circumferential velocity and an axial velocity along the first direction.

[0024] Preferably, an oil drain pipe is provided below the oil drain channel.

[0025] Preferably, one end of the exhaust pipe extending to the separation unit extends toward the outer circumference to form a first flange; one end of the separation unit close to the exhaust pipe extends toward the inner circumference to form a second flange; the first flange and the second flange are connected by an annular connecting plate to form an oil drain channel, so that the oil drain channel is in the shape of an annular groove;

[0026] The bottom width of the annular groove formed by the oil discharge channel is greater than the width at the groove opening.

[0027] Preferably, the cross-sectional area of ​​the separation unit close to the end of the exhaust pipe is smaller than the cross-sectional area of ​​the separation unit away from the end of the exhaust pipe.

[0028] Preferably, the guide core is cylindrical.

[0029] Preferably, a spiral guide groove is provided on the inner wall of the separation unit.

[0030] A scroll compressor uses the oil-gas separation component; the scroll compressor includes a shell and a fixed scroll plate arranged inside the shell, the first exhaust port is arranged on the fixed scroll plate, and the oil-gas separation component is arranged in the shell and connected to the fixed scroll plate.

[0031] Compared with the prior art, the advantages of the present invention are:

[0032] (1) In the present invention, when the compressed gas of the scroll compressor enters through the air inlet pipe, the flow area decreases and the flow velocity increases. When entering the separation chamber, the flow area increases and the flow velocity decreases. The oil and gas are separated by the change in flow velocity and the difference in inertia between gas and liquid, thus achieving the first separation of oil and gas.

[0033] The tangential entry into the separation chamber and the setting of the guide core can play a role in guiding the flow, causing the fluid to flow around at high speed, and the oil droplets to generate greater centrifugal inertia, thereby improving the oil-gas separation efficiency. In addition, the tangential entry into the separation chamber causes a relatively weak collision with the inner wall of the separation unit, resulting in a uniform pressure change. The fluid performs a high-speed circular motion around the inner wall of the separation unit, which easily causes the oil to be shaken off from the gas and adhere to the inner wall of the separation unit, thereby achieving a secondary separation of oil and gas.

[0034] (2) While the fluid is moving around in the separation chamber, it flows toward the exhaust pipe along the first direction. As the rotation radius becomes smaller, the centrifugal inertia of the oil increases, thereby improving the oil-gas separation efficiency;

[0035] When the fluid moves along the first direction to the gap, the cross-sectional area expands sharply, while the flow velocity decreases. The third separation of oil and gas is achieved through the change in flow velocity and the difference in inertia between oil and gas.

[0036] At this time, the oil continues to flow around to the oil discharge channel, flows into the oil discharge pipe and out, while the gas is discharged from the exhaust pipe. During this process, the oil mist generated by the collision between the oil and the bottom of the oil discharge channel adheres to the inner wall of the oil discharge channel, preventing the oil mist from mixing back and enhancing the oil and gas separation effect.

[0037] The overall direction of gas movement in the separation chamber and the exhaust pipe is the same, without reversal or large-scale turning, which avoids the generation of turbulence, increases the stability of gas flow, and thus increases the efficiency of oil and gas separation;

[0038] (3) By setting a guide groove on the inner wall of the separation unit, the oil flows along the guide groove, and the contact area with the gas is smaller, which increases the resistance of the gas to the oil in the guide groove and reduces the occurrence of back mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0040] Figure 1 It is a structural schematic diagram of a scroll compressor having the oil-gas separation component of the present invention;

[0041] Figure 2 This is a schematic structural diagram of the oil-gas separation component of the present invention;

[0042] Figure 3 This is a front view structural diagram of the oil-gas separation component of the present invention;

[0043] Figure 4 for Figure 3 A schematic cross-sectional view at AA in the figure and a schematic structural diagram of the oil-gas separation assembly of Example 1;

[0044] Figure 5 for Figure 4 The enlarged structural diagram at B in the middle;

[0045] Figure 6 This is a schematic structural diagram of Example 2 of the present invention;

[0046] Figure 7 Schematic diagram of the flow direction of the mixed gas according to the present invention.

[0047] Wherein: air intake unit 1, air intake pipe 11;

[0048] Separation unit 2, separation chamber 2a, guide core 21, gap 22, oil discharge channel 23, oil discharge pipe 24, second flange 25, connecting plate 26, guide groove 27;

[0049] Exhaust pipe 3, first flange 31;

[0050] Fixed scroll 4, first exhaust port 41;

[0051] First direction S1. DETAILED DESCRIPTION

[0052] The present invention will be described in further detail below with reference to specific embodiments:

[0053] like Figures 1-6 As shown, the oil-gas separation component in the present invention is applied to a scroll compressor. It is relatively small and is installed inside the compressor, and can effectively separate the oil and liquid in the compressed gas. After separation, the oil and liquid enter the compressor circulation again, and the gas is discharged for subsequent transmission or processing. The provision of the oil-gas separation component increases the reliability of the compressor, and also avoids the need to set up or excessively set up filtering devices in subsequent processing of the gas, thereby increasing equipment and maintenance costs. Among them, the compressed gas of the scroll compressor enters the separation chamber 2a through the air inlet pipe 11 of the exhaust unit. The compressed gas is a mixed gas, containing oil and gas. When entering the intake pipe 11, the flow area decreases and the flow velocity increases; when entering the separation chamber 2a, the flow area increases sharply and the flow velocity decreases. Due to the difference in inertia, the first separation of oil and gas is completed when the flow velocity changes; the mixed gas enters the separation chamber 2a tangentially, and under the guidance of the guide core 21, it rotates along the inner wall of the separation unit 2 to form an inertial centrifugal force. The second separation of oil and gas is completed by the difference in inertial centrifugal force; during the rotational flow, the rotation radius of the fluid decreases and the flow velocity increases. When entering the gap 22 (such as Figure 4 When the oil reaches the area between the two dashed lines (shown), the flow area increases dramatically and the flow velocity decreases sharply. Due to the difference in inertia, the oil and gas undergo a third separation as the flow velocity changes. After separation, the gas is discharged through exhaust pipe 3, while the oil flows through oil discharge channel 23 and converges to oil discharge pipe 24 for discharge.

[0054] Specifically:

[0055] An oil-gas separation assembly includes an air intake unit 1, a separation unit 2, and an exhaust pipe 3. The detailed structure is described in the following embodiments. Figure 4As shown, the axial direction of the guide core 21 and the exhaust pipe 3 is the first direction S1; when applied to a vertical scroll compressor, the oil-gas separation component is installed at the upper end of the static scroll plate 4, defining the upper and lower directions. Of course, it should be noted that in other embodiments, the first direction S1 can be set to form a certain angle with the horizontal direction; in the application of a horizontal compressor, the oil-gas separation component is set to the side of the static scroll plate 4, and the first direction S1 can also be a vertical direction, that is, the exhaust pipe 3 is below the guide core 21. It can be set or laid out according to actual application requirements. However, in this embodiment, for the sake of convenience, the first direction S1 is described as the horizontal direction.

[0056] Embodiment 1:

[0057] like Figure 2-Figure 5 As shown, the intake unit 1 is connected to the first exhaust port 41 and communicates with the separation unit 2 via the intake pipe 11. The inner wall of the separation unit 2 has a circular cross-section, with its axis parallel to the first direction S1. A cylindrical, coaxial flow guide core 21 is disposed within the separation unit 2. The exhaust pipe 3 is cylindrical and disposed along the first direction S1, with its axis coinciding with the axis of the flow guide core 21. The end of the exhaust pipe 3 extends into the interior of the separation unit 2 in the first direction S1 and, together with the inner wall of the separation unit 2, forms an oil drain channel 23. An oil drain pipe 24 is disposed below the oil drain channel 23.

[0058] A gap 22 is formed between the end of the exhaust pipe 3 near the guide core 21 and the guide core 21. The projection of the end of the guide core 21 near the exhaust pipe 3 on the end surface of the exhaust pipe 3 completely covers the exhaust pipe 3, that is, the inner diameter of the exhaust pipe 3 is smaller than the diameter of the end of the guide core 21 near the exhaust pipe 3.

[0059] In this embodiment, the cross-sectional area of ​​the intake pipe 11 is smaller than that of the first exhaust port 41. As the compressed gas enters the intake pipe 11 through the first exhaust port 41, the flow area decreases dramatically, while the flow rate increases dramatically. Upon entering the separation chamber 2a, the flow area increases dramatically, while the flow rate decreases again. Due to the different inertias of the oil and gas, the rapid change in flow rate causes the oil and gas to separate.

[0060] The separation unit 2 is generally truncated cone-shaped. The flow guide core 21 is connected to the center of the larger end of the truncated cone and, together with the separation unit 2, forms the separation chamber 2a. The exhaust pipe 3 is connected to the smaller end of the truncated cone-shaped separation unit 2. In the first direction S1, and in the direction of gas discharge toward the exhaust pipe 3, the closer to the gap 22, the smaller the cross-sectional area of ​​the separation chamber 2a. The flow guide core 21 can also be truncated cone-shaped or other shapes to ensure a uniform cross-sectional area of ​​the separation chamber 2a.

[0061] When the mixed gas enters the separation chamber 2a from the air inlet pipe 11, it enters tangentially along the inner wall of the separation unit 2. First, when the mixed gas enters, turbulence is not easily generated. The mixed gas can rotate and flow along the inner wall of the separation unit 2, which makes it easy for the oil to separate from the gas and adhere to the inner wall of the separation unit 2. Secondly, when the mixed gas enters tangentially, the collision with the inner wall of the separation unit 2 is extremely small, avoiding the oil mist generated by the collision from being re-mixed. In addition, when the mixed gas flows along the inner wall of the separation unit 2, the difference in inertial centrifugal force promotes the separation of oil and gas. At the same time, as the rotation radius decreases and the flow rate increases, the difference in inertial centrifugal force gradually increases, further increasing the separation efficiency of oil and gas.

[0062] When the mixed gas flows into gap 22, the flow area increases dramatically and the flow rate decreases sharply. Due to the difference in inertia, the oil and gas separate again. At this point, the gas has less inertia and, without the guidance of the guide core 21 and the dramatic increase in flow area, moves in the first direction S1 and is discharged through the exhaust pipe 3. The oil, however, due to its greater inertia, continues to swirl around the inner wall of the separation unit 2. The oil flows into the oil drain channel 23, where it gathers and is discharged through the oil drain pipe 24.

[0063] In this embodiment, it should be noted that:

[0064] The inlet pipe 11 is circular and may be provided in multiple configurations. In other embodiments, the inlet pipe 11 may also have a rectangular or other cross-sectional shape. In the first direction S1, the inlet passage formed by the inlet pipe 11 does not extend beyond the plane of the end of the guide core 21 near the exhaust pipe 3. In other words, gas entering the separation chamber 2a through the inlet pipe 11 is guided by the guide core 21, causing it to steadily rotate around the inner wall of the separation unit 2, thereby avoiding turbulence that could affect separation efficiency.

[0065] The exhaust pipe 3 extends to the end of the separation unit 2 and extends to the outer circumference to form a first flange 31; the end of the separation unit 2 close to the exhaust pipe 3 extends to the inner circumference to form a second flange 25; the first flange 31 and the second flange 25 are connected by an annular connecting plate 26 to form an oil drain channel 23, so that the oil drain channel 23 is an annular groove. The groove bottom width of the annular groove formed by the oil drain channel 23 is larger than the groove opening width. That is, Figure 5 The D1 is greater than d1, so that most of the oil mist generated by the collision of the oil with the bottom of the oil discharge channel 23 is attached to the inner wall of the oil discharge channel 23, avoiding the back mixing of the oil mist and enhancing the oil-gas separation effect.

[0066] Example 2:

[0067] Based on the structure of Example 1, Figure 6As shown, a spiral guide groove 27 is provided on the inner wall of the separation unit 2 .

[0068] In this embodiment, after the mixed gas enters the separation chamber 2a tangentially from the intake pipe 11, the guide groove 27 further guides the flow of the mixed gas, thereby further avoiding the generation of turbulence.

[0069] In addition, most of the separated oil flows in the guide groove 27, which reduces the contact area between the gas and the oil, increases the resistance of the high-speed gas to the secondary oil, further avoids the back mixing of the oil, and thus improves the separation efficiency.

[0070] In the above two embodiments, the oil-gas separation component performs the following separation process of oil and gas:

[0071] The mixed gas compressed by the scroll compressor enters the intake pipe 11 from the first exhaust port 41. During this process, the flow area becomes smaller and the flow rate increases; then it enters the separation chamber 2a from the intake pipe 11. During this process, the flow area becomes rapidly larger and the flow rate slows down sharply. The inertia of the oil is greater than the inertia of the gas, so the first separation of the oil and gas is completed at this time.

[0072] The mixed gas then enters the separation chamber 2a tangentially and, under the guidance of the guide core 21, rotates around the interior of the separation unit 2. During this process, the oil's inertial centrifugal force is large, separating it from the gas, achieving a second separation of the oil and gas.

[0073] The mixed gas circulates within the separation chamber 2a while moving in the first direction S1 toward the exhaust pipe 3. During this process, the rotation radius gradually decreases, while the flow velocity gradually increases. The centrifugal force and inertia are large, promoting separation. When the mixed gas reaches the gap 22, the flow area increases dramatically, while the flow velocity decreases sharply. The inertia of the oil is greater than that of the gas, thus completing the third separation of the oil and gas.

[0074] Afterwards, the gas is discharged from the exhaust pipe 3 , and the oil continues to flow along the inner wall of the separation unit 2 in a rotating manner and gathers in the oil discharge channel 23 , and finally flows out from the oil discharge pipe 24 .

[0075] In the above three oil and gas separation processes, first, the gas enters the separation chamber 2a tangentially and cooperates with the flow guidance of the guide core 21 to reduce the oil mist generated by collision and thus reduce the back mixing rate; at the same time, it can avoid turbulence caused by disordered flow and affect the flow rate of the mixed gas.

[0076] Secondly, the provision of the guide groove 27 allows most of the oil after the first and second separations to flow along the guide groove 27, reducing the contact area with the gas and further reducing the back-mixing rate.

[0077] Secondly, the opening end width of the annular groove formed by the oil discharge channel 23 is set to be smaller, so that most of the oil mist generated by the oil entering the oil discharge channel 23 at high speed is attached to the inner wall of the oil discharge channel 23, thereby reducing the back mixing rate.

[0078] The present invention also provides a scroll compressor comprising a housing and a fixed scroll 4 disposed within the housing. Fixed scroll 4 is provided with a first exhaust port 41. The aforementioned oil-gas separation assembly is disposed within the housing and is sealedly connected to first exhaust port 41 via an exhaust unit. Compressed gas is discharged from first exhaust port 41 to the exhaust unit and then enters the oil-gas separation assembly.

[0079] After separation in the oil-gas separation assembly, the oil flows back to the oil pool of the compressor for continued circulation, and the gas is discharged into the shell and discharged through the corresponding discharge channel provided on the shell.

[0080] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they are not intended to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. An oil-gas separation assembly for a scroll compressor, the scroll compressor comprising a first exhaust port, characterized in that: The oil-gas separation assembly includes an air intake unit, a separation unit, and an exhaust pipe, wherein the air intake unit is connected to the first exhaust port and communicates with the separation unit through the air intake pipe, and the cross-sectional area of ​​the air intake pipe is smaller than the cross-sectional area of ​​the first exhaust port; The inner wall section of the separation unit is circular, and a concentric flow guide core with an outer wall section of a circle is provided inside the separation unit; The exhaust pipe is arranged along the first direction and is coaxial with the guide core. The end of the exhaust pipe extends in the first direction to the interior of the separation unit and forms an oil drainage channel together with the inner wall of the separation unit. The bottom width of the annular groove formed by the oil drainage channel is greater than the width at the groove opening. There is a gap between the end of the exhaust pipe close to the guide core and the guide core; the projection of the end of the guide core close to the exhaust pipe on the end surface of the exhaust pipe completely covers the exhaust pipe; An oil drain pipe is provided below the oil drain channel; The exhaust pipe extends to one end of the separation unit and extends toward the outer circle to form a first flange; the separation unit extends toward the inner circle to form a second flange close to the exhaust pipe; the first flange and the second flange are connected by an annular connecting plate to form an oil drain channel, so that the oil drain channel is a circular groove shape.

2. The oil-gas separation component according to claim 1, characterized in that: The guide core and the separation unit together form a separation cavity; in the first direction, the closer to the gap, the smaller the cross-sectional area of ​​the separation cavity.

3. The oil-gas separation component according to claim 1, characterized in that: In the first direction, the air intake channel formed by the air intake pipe does not exceed the plane where the end of the guide core close to the exhaust pipe is located.

4. The oil-gas separation component according to claim 1, characterized in that: The air intake direction of the air intake pipe toward the separation unit is tangent to the inner wall of the separation unit, and the incoming gas has both a circumferential velocity and an axial velocity along the first direction.

5. The oil-gas separation component according to claim 2, characterized in that: The cross-sectional area of ​​the separation unit at one end close to the exhaust pipe is smaller than the cross-sectional area of ​​the separation unit at one end away from the exhaust pipe.

6. The oil-gas separation component according to claim 1, characterized in that: The guide core is cylindrical.

7. The oil-gas separation component according to claim 4, characterized in that: A spiral guide groove is provided on the inner wall of the separation unit.

8. A scroll compressor, characterized in that: The oil-gas separation component according to any one of claims 1 to 7 is applied; the scroll compressor includes a shell and a fixed scroll plate arranged inside the shell, the first exhaust port is arranged on the fixed scroll plate, and the oil-gas separation component is arranged in the shell and connected to the fixed scroll plate.

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