Oil-gas separation assembly and scroll compressor

Abstract

The invention relates to the field of scroll compressors, in particular to an oil-gas separation assembly and a scroll compressor, the scroll compressor comprises a first exhaust port, a gas inlet unit, a separation unit and an exhaust pipe, the gas inlet unit is connected with the first exhaust port and communicated with the separation unit through a gas inlet pipe, and the separation unit is connected with the first exhaust port through a gas outlet pipe; the sectional area of the air inlet pipe is smaller than that of the first exhaust port; the cross section of the inner wall of the separation unit is circular, and a concentric flow guide core with a circular outer wall cross section is arranged in the separation unit; the exhaust pipe is arranged in the first direction and is coaxial with the flow guide core, the end part of the exhaust pipe extends into the separation unit in the first direction, and an oil discharge channel is formed by the end part of the exhaust pipe and the inner wall of the separation unit. Through at least three times of oil-gas separation, the gas purity is greatly improved when compressed gas is discharged, and the follow-up treatment difficulty and follow-up treatment cost are reduced.

Description

Technical Field

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

[0002] Conventional scroll compressors, as a kind of efficient and reliable compression equipment, mainly consist of a housing and a compression component. The housing not only serves as a protective cover for the entire compressor but also undertakes the important responsibility of supporting and fixing internal parts. It is internally designed with a high-pressure cavity, which is a special design for receiving and temporarily storing the compressed gas to ensure its stable state before discharge.

[0003] The compression component, as the "heart" of the scroll compressor, is composed of a moving scroll disk and a stationary scroll disk through precise cooperation. The relative movement between the two is the core mechanism of the compressor's operation. They gradually compress the gas entering the compressor through complex orbital movements. During the working process, the moving scroll disk makes an eccentric rotary motion under the action of a driving force, meshes with the stationary scroll disk, and forms a series of gradually shrinking closed volumes. The gas is continuously compressed in these closed volumes until it reaches the required pressure level and is then discharged into the high-pressure cavity inside the housing.

[0004] However, in the process of transporting and compressing specific gases, such as special gases like helium, the scroll compressor faces unprecedented challenges. Due to its unique physical properties, helium generates a relatively high temperature during the compression process. This high-temperature environment makes it easier for lubricating oil, moisture, and other possible impurities to dissolve in the compressed high-pressure gas. The mixing of these impurities not only seriously reduces the purity of helium but may also have a great negative impact on its subsequent applications.

[0005] Especially in cryopump systems, the purity requirement for helium is extremely high. If the oil mist generated during the compression process fails to be effectively removed, then during transportation, these oil mists may solidify in a low-temperature environment, forming solid particles. These solid particles will not only clog the pipeline but may also damage key equipment such as the pump body, seriously affecting the normal operation and stability of the system.

[0006] To address this challenge, additional filtration devices are usually adopted in the prior art to purify the compressed helium. These filtration devices strive to reduce the impurities in the gas to the lowest level by means of multi-stage filtration and adding adsorbers. However, this treatment scheme is not perfect. The filtration devices need to be replaced and maintained regularly, which not only increases the operating cost of the compressor but also brings an additional burden to the daily maintenance work.

[0007] In addition, those skilled in the art are also constantly exploring more efficient oil-gas separation technologies. Such as: Patent No. CN202411571571.0 proposes an oil-gas separation component and a scroll compressor design. The core idea is to set up an exhaust pipe in the exhaust direction of the exhaust port. By utilizing the collision of the gas when discharging with the exhaust pipe and the rotational flow motion generated on the outer wall of the exhaust pipe, the separation of oil and gas is achieved through the action of centrifugal force. However, it has certain limitations in practical applications.

[0008] Specifically, in the design, when the mixed gas is discharged, it first rotates around the outer wall of the exhaust pipe 3 and moves in a certain direction (such as the opposite direction of S1); subsequently, the mixed gas needs to change direction and move in the opposite direction (the positive direction of S1) in order to enter the exhaust pipe 3 and be discharged.

[0009] During this process, 1. The compressed gas undergoes centrifugal motion and should rotate along the inner wall of a certain structure, rather than rotating around the outer wall of the exhaust pipe 3 over a long distance; 2. The direction of the compressed gas changes by 180 degrees. This significant change in direction will cause the gas to collide with each other, forming turbulence, which will affect the movement trajectory of the mixed gas around the exhaust pipe. The generation of turbulence will weaken the separation effect of centrifugal force on oil and gas, thereby reducing the oil-gas separation effect; 3. When the compressed gas is discharged, the flow-through area increases sharply, achieving a certain oil-gas separation effect. However, the collision pressure with the outer wall of the exhaust pipe 3 decreases rapidly, and an effective centrifugal force inertia cannot be formed for separation; 4. The collision of the compressed gas with the outer wall of the exhaust pipe 3 will generate oil mist, and the continuous entry of the compressed gas will cause the backmixing of the oil mist, which also reduces the separation effect.

[0010] Patent No. CN201822006088.4 provides an exhaust device and a compressor for a horizontal scroll compressor, and proposes a compressed oil-gas separation device that changes the flow rate of the mixed gas by setting up a miscibility chamber on the pipeline, thereby achieving the separation of oil and gas. The original intention of this design is to utilize the change in the flow direction and flow rate of the mixed gas during transmission in the pipeline to achieve the separation purpose. However, in practical applications, this solution also has some deficiencies.

[0011] When the mixed gas is transmitted in the pipeline, even at the bending part, the contact area with the pipe wall is relatively limited. Most of the gas directly enters the miscibility chamber through the pipeline, and the bending of the pipeline also reduces the flow rate of the mixed gas to a certain extent. When the mixed gas enters the miscibility chamber, it is in a straight jet shape, and the change in flow rate can play a certain separation role. However, due to the limitations of the contact area and the change in flow rate, this separation effect is relatively limited and difficult to meet the requirements of efficient oil-gas separation.

[0012] The patent number CN202223123746.0 provides an oil-gas separation structure and a heat pump compressor. By setting the first oil-gas separation pipe and the second oil-gas separation pipe, and adjusting the angles and heights of the two pipes, the separation of oil and gas is achieved. This design utilizes the collision of the mixed gas between the two pipes and the change in flow velocity to achieve the separation purpose. However, this solution also has limitations.

[0013] In the first oil separation pipe, the oil only falls down to the oil return section by gravity, with very little inertia, while the gas velocity is very high, and the oil and gas on the pipe wall are prone to secondary mixing. Therefore, the oil-gas separation efficiency of this solution is relatively limited, and it is difficult to meet the requirements of high-precision and high-efficiency oil-gas separation.

[0014] In summary, although these patents have proposed some innovative oil-gas separation solutions, there are still some limitations and deficiencies in practical applications. Therefore, how to improve the oil-gas separation efficiency of the compressor, ensure the purity of special gases, and the smooth progress of subsequent applications has become an important issue that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0015] The object of the present invention is to provide an oil-gas separation component and a scroll compressor to solve the problem that the low oil-gas separation efficiency in the prior art affects the purity of special gases and the smooth progress of subsequent applications.

[0016] The technical solution of the present invention is: an oil-gas separation component for a scroll compressor, the scroll compressor includes a first exhaust port, and includes an intake unit, a separation unit, and an exhaust pipe. The intake unit is connected to the first exhaust port and communicates with the separation unit through an intake pipe, and the cross-sectional area of the 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 guide core with a circular outer wall section and concentric with it is arranged inside; 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 separation unit in the first direction and forms an oil discharge channel together with the inner wall of the separation unit; Wherein, 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 face of the exhaust pipe completely covers the exhaust pipe.

[0017] Preferably, the guide core and the separation unit together form a separation cavity; in the first direction, the cross-sectional area of the separation cavity becomes smaller the closer it is to the gap.

[0018] Preferably, in the first direction, the intake channel formed by the intake pipe does not exceed the plane where the end of the guide core close to the exhaust pipe is located.

[0019] Preferably, 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.

[0020] Preferably, an oil drain pipe is provided below the oil drain channel.

[0021] 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; The bottom width of the annular groove formed by the oil discharge channel is not less than the width at the groove opening.

[0022] Preferably, the cross-sectional area of the separation unit close to one end of the exhaust pipe is smaller than the cross-sectional area of the separation unit far from one end of the exhaust pipe.

[0023] Preferably, the guide core is cylindrical.

[0024] Preferably, a spiral guide groove is provided on the inner wall of the separation unit.

[0025] 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.

[0026] Compared with the prior art, the advantages of the present invention are: (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 of flow velocity and the difference in inertia between gas and liquid, thereby realizing the first separation of the oil and gas. The setting of the tangential entry into the separation chamber and the guide core can play a role in guiding the flow, so that the fluid can rotate and flow around at high speed, and the oil droplets can generate greater centrifugal inertia, thereby improving the oil-gas separation efficiency; in addition, the tangential entry into the separation chamber produces a relatively weak collision with the inner wall of the separation unit, and the pressure changes evenly. The fluid moves in a high-speed circular motion around the inner wall of the separation unit, which makes it easy for the oil to be thrown off from the gas and attached to the inner wall of the separation unit, thereby realizing the second separation of the oil and gas; (2) While the fluid is circumferentially moving in the separation chamber, it flows toward the exhaust pipe along the first direction. As the rotation radius decreases, the centrifugal inertia of the oil increases, thereby improving the oil-gas separation efficiency; When the fluid moves in the first direction to the gap, the intercepting area expands sharply while the flow velocity decreases. Through the change in flow velocity and the inertia difference between oil and gas, the third separation of oil and gas is achieved. At this time, the oil continues to flow around to the oil discharge channel, flows into the oil discharge pipe through the oil discharge channel and then flows out, while the gas is discharged through the exhaust pipe. During this process, the oil mist generated by the collision of the oil with the bottom of the oil discharge channel is attached to the inner wall of the oil discharge channel, avoiding the back-mixing of the oil mist and enhancing the oil-gas separation effect. The overall direction of the gas movement in the separation chamber and the exhaust pipe is the same, without reverse or large-scale turning, avoiding the generation of turbulence, increasing the stability of gas flow, and thus increasing the efficiency of oil-gas separation. (3) By arranging a diversion groove on the inner wall of the separation unit, the oil flows along the diversion groove, with a smaller contact area with the gas, increasing the resistance to the oil carried by the gas for the second time in the diversion groove and reducing the occurrence of back-mixing. Brief Description of the Drawings

[0027] The present invention will be further described below in conjunction with the drawings and embodiments: Figure 1 It is a schematic structural diagram of a scroll compressor with the oil-gas separation component of the present invention; Figure 2 It is a schematic structural diagram of the oil-gas separation component of the present invention; Figure 3 It is a front view structural schematic diagram of the oil-gas separation component of the present invention; Figure 4 It is Figure 3 The sectional view taken along A-A in and the schematic structural diagram of the oil-gas separation component of Embodiment 1; Figure 5 It is Figure 4 The enlarged structural schematic diagram at B in ; Figure 6 It is a schematic structural diagram of Embodiment 2 of the present invention; Figure 7 It is a schematic diagram of the flow direction of the mixed gas of the present invention.

[0028] Among them: intake unit 1, intake pipe 11; Separation unit 2, separation chamber 2a, diversion core 21, gap 22, oil discharge channel 23, oil discharge pipe 24, second flange 25, connecting plate 26, diversion groove 27; Exhaust pipe 3, first flange 31; Stationary scroll disk 4, first exhaust port 41; First direction S1. Detailed Description of the Specific Embodiment

[0029] The content of the present invention will be further described in detail below in conjunction with specific embodiments: As Figures 1-6 shown, the oil-gas separation component in the present invention is applied to a scroll compressor. It has a relatively small volume and is installed inside the compressor, and can effectively separate the oil in the compressed gas. After separation, the oil re-enters the cycle of the compressor, and the gas is discharged for subsequent transmission or processing. By setting the oil-gas separation component, the reliability of the compressor is increased, and it also avoids setting or setting too many filtering devices in the subsequent processing of the gas, thereby increasing the equipment and maintenance costs. Among them, the compressed gas of the scroll compressor enters the separation chamber 2a through the intake 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. Through the inertia difference, the first separation of the oil and gas is completed when the flow velocity changes; the mixed gas tangentially enters the separation chamber 2a, and under the guidance of the guide core 21, it rotates and flows along the inner wall of the separation unit 2 to form an inertial centrifugal force. Through the difference of the inertial centrifugal force, the second separation of the oil and gas is completed; during the process of the fluid rotating and flowing, the rotation radius decreases and the flow velocity increases. When entering the gap 22 (such as Figure 4 the area between the two dotted lines shown), the flow area increases sharply and the flow velocity decreases sharply. Through the inertia difference, the third separation of the oil and gas is completed when the flow velocity changes. After separation, the gas is discharged through the exhaust pipe 3, and the oil flows through the oil discharge channel 23 and converges to the oil discharge pipe 24 for discharge.

[0030] Specifically: An oil-gas separation component includes an intake unit 1, a separation unit 2, and an exhaust pipe 3. The detailed structure is described in the following embodiments. As Figure 4 shown, the axial direction of the guide core 21 and the exhaust pipe 3 is defined as the first direction S1; when applied to a vertical scroll compressor, the oil-gas separation component is installed at the upper end of the stationary scroll plate 4, and the up and down directions are defined. Of course, it should be noted that in other embodiments, the first direction S1 can be set at a certain angle with the horizontal direction; in the application of a horizontal compressor, the oil-gas separation component is arranged on the side of the stationary scroll plate 4, and the first direction S1 can also be the vertical direction, that is, the exhaust pipe 3 is below the guide core 21. It can be set or arranged according to actual application requirements. However, in this embodiment, for the convenience of description, the first direction S1 is described as the horizontal direction.

[0031] Embodiment 1:

[0032] As Figures 2-5As shown, the intake unit 1 is connected to the first exhaust port 41 and communicates with the separation unit 2 through the intake pipe 11. The cross-section of the inner wall of the separation unit 2 is circular, and its axis is parallel to the first direction S1; a cylindrical guide core 21 coaxial with it is arranged inside the separation unit 2. The exhaust pipe 3 is cylindrical and arranged along the first direction S1, and its axis coincides with the axis of the guide core 21. The end of the exhaust pipe 3 extends into the separation unit 2 in the first direction S1 and forms an oil drainage channel 23 with the inner wall of the separation unit 2. An oil drainage pipe 24 is arranged below the oil drainage channel 23.

[0033] Among them, a gap 22 is formed between one end of the exhaust pipe 3 close to the guide core 21 and the guide core 21. The projection of the end of the guide core 21 close to the exhaust pipe 3 on the end face 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 one end of the guide core 21 close to the exhaust pipe 3.

[0034] In this embodiment, the cross-sectional area of the intake pipe 11 is smaller than the cross-sectional area of the first exhaust port 41, so that when the compressed gas enters the intake pipe 11 from the first exhaust port 41, the flow-through area decreases sharply and the flow velocity increases sharply. When entering the separation chamber 2a, the flow-through area increases sharply and the flow velocity decreases sharply again. Due to the different inertia of the oil and gas, when the flow velocity changes sharply, the oil and gas are separated.

[0035] The separation unit 2 is generally frustum-shaped, the guide core 21 is connected to the center of the larger end of the frustum shape, and together with the separation unit 2 forms a separation chamber 2a. The exhaust pipe 3 is connected to the smaller end of the frustum-shaped separation unit 2. In the first direction S1 and in the direction of discharging gas to the exhaust pipe 3, the closer to the gap 22, the smaller the cross-sectional area of the separation chamber 2a. The guide core 21 can also be frustum-shaped or other shapes, as long as the cross-sectional area of the separation chamber 2a changes uniformly.

[0036] When the mixed gas enters the separation chamber 2a from the intake pipe 11, it enters tangentially along the inner wall of the separation unit 2. First of all, when the mixed gas enters, it is not easy to generate turbulence, and the mixed gas can make a rotational swirling motion along the inner wall of the separation unit 2, which easily makes the oil 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 back-mixed. In addition, when the mixed gas makes a swirling motion along the inner wall of the separation unit 2, due to the different inertial centrifugal forces, it promotes the separation of the oil and gas. At the same time, because the rotation radius decreases and the flow velocity increases, the difference in inertial centrifugal force gradually increases, further increasing the separation efficiency of the oil and gas.

[0037] When the mixed gas flows to the area of the gap 22, the flow area increases sharply and the flow velocity decreases sharply. Due to the inertial difference, it promotes the separation of the oil and gas again. At this time, the gas has a small inertia. Without the diversion of the diversion core 21 and with the sharp increase in the flow area, it moves along the first direction S1 and is discharged through the exhaust pipe 3; while the oil has a large inertia and continues to flow in a rotational flow along the inner wall of the separation unit 2. The oil flows to the oil discharge channel 23 and accumulates in the oil discharge channel 23, and is discharged through the oil discharge pipe 24.

[0038] In this embodiment, it should be noted that: The intake pipe 11 is in the shape of a circular hole and is provided in multiple numbers. In other embodiments, the intake pipe 11 can also be set to have a rectangular cross-section or other shapes. In the first direction S1, the intake channel formed by the intake pipes 11 does not exceed the plane where the end of the diversion core 21 close to the exhaust pipe 3 is located. That is, the gas entering the separation chamber 2a through the intake pipes 11 will all be diverted by the diversion core 21, so that it stably flows in a rotational flow along the inner wall of the separation unit 2. To avoid generating turbulence and affecting the separation efficiency.

[0039] The exhaust pipe 3 extends to one end of the separation unit 2 and extends to the outer circumference to form a first flange 31; one 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 discharge channel 23, so that the oil discharge channel 23 is in the shape of an annular groove. The width of the bottom of the annular groove formed by the oil discharge channel 23 is not less than the width at the notch. That is, as Figure 4 described, 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 backmixing of the oil mist and enhancing the oil-gas separation effect.

[0040] Embodiment 2:

[0041] Based on the structure of Embodiment 1, as Figure 6 shown, a spiral diversion groove 27 is provided on the inner wall of the separation unit 2.

[0042] In this embodiment, after the mixed gas enters the separation chamber 2a tangentially through the intake pipe 11, the diversion groove 27 plays a further role in diverting the flow of the mixed gas, further avoiding the generation of turbulence.

[0043] In addition, most of the separated oil flows in the diversion groove 27, reducing the contact area between the gas and the oil, increasing the resistance of the high-speed gas to carry the oil again, further avoiding the backmixing of the oil, and thus improving the separation efficiency.

[0044] In the above two embodiments, the process of the oil-gas separation component separating the oil and gas is as follows: The mixed gas compressed by the scroll compressor enters the intake pipe 11 from the first exhaust port 41. During this process, due to the decrease in the flow area, the flow velocity increases; then it enters the separation chamber 2a from the intake pipe 11. During this process, due to the sharp increase in the flow area, the flow velocity decreases sharply. The inertia of the oil is greater than that of the gas. Therefore, the first separation of the oil and gas is completed at this time.

[0045] After that, the mixed gas enters the separation chamber 2a tangentially and, under the guidance of the guide core 21, makes a rotational flow motion along the inside of the separation unit 2. During this process, the inertial centrifugal force of the oil is relatively large, and it separates from the gas, realizing the second separation of the oil and gas.

[0046] While the mixed gas makes a rotational flow motion in the separation chamber 2a, it moves towards the exhaust pipe 3 along the first direction S1. During this process, the rotation radius gradually decreases first, the flow velocity gradually increases, and the inertial centrifugal force is large, promoting separation. When flowing to the gap 22, the flow area increases sharply and the flow velocity decreases sharply. The inertia of the oil is greater than that of the gas. Therefore, during this process, the third separation of the oil and gas is completed.

[0047] After that, the gas is discharged from the exhaust pipe 3, and the oil continues to make a rotational flow motion along the inner wall of the separation unit 2 and gathers in the oil discharge channel 23, and finally flows out through the oil discharge pipe 24.

[0048] In the above three separation processes of the oil and gas, first of all, the setting of the gas entering the separation chamber 2a tangentially and the guidance of the guide core 21 reduce the oil mist generated by the collision, thereby reducing the backmixing rate; at the same time, it can avoid the turbulence caused by the disordered flow and affect the flow velocity of the mixed gas.

[0049] Secondly, the setting of the diversion groove 27 makes most of the oil after the first and second separations flow along the diversion groove 27, reducing the contact area with the gas, thereby reducing the backmixing rate.

[0050] Secondly, the setting of the relatively small opening end width of the annular groove formed by the oil discharge channel 23 makes most of the oil mist generated when the oil enters the oil discharge channel 23 at high speed adhere to the inner wall of the oil discharge channel 23, thereby reducing the backmixing rate.

[0051] The present invention also provides a scroll compressor, including a housing and a stationary scroll plate 4 arranged inside the housing. A first exhaust port 41 is arranged on the stationary scroll plate 4. The above oil-gas separation assembly is arranged in the housing and is hermetically connected to the first exhaust port 41 through an exhaust unit. So that the compressed gas is discharged from the first exhaust port 41 to the exhaust unit and then enters the oil-gas separation assembly.

[0052] After the separation by the oil-gas separation assembly, the oil flows back to the oil sump of the compressor for continuous recycling, and the gas is discharged into the housing and discharged through the corresponding discharge channels arranged on the housing.

[0053] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope 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 without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. An oil-gas separation component for a scroll compressor, the scroll compressor including a first exhaust port, characterized in that: It includes an intake unit, a separation unit and an exhaust pipe. The intake unit is connected to the first exhaust port and communicates with the separation unit through an intake pipe, and the cross-sectional area of the intake pipe is smaller than that of the first exhaust port. The cross-section of the inner wall of the separation unit is circular, and a guide core with a circular outer wall cross-section and concentric is arranged inside it. 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 separation unit in the first direction and forms an oil drainage channel together with the inner wall of the separation unit. Wherein, 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 face of the exhaust pipe completely covers the exhaust pipe.

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

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

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

5. The oil-gas separation component according to claim 1, wherein: A drain pipe is arranged below the oil drainage channel.

6. The oil-gas separation component according to claim 5, characterized in that: The end of the exhaust pipe extending into the separation unit extends towards the outer circumference to form a first flange; the end of the separation unit close to the exhaust pipe extends towards 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 drainage channel, so that the oil drainage channel is in the shape of an annular groove. The width of the bottom of the annular groove formed by the oil drainage channel is not less than the width at the notch.

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

8. The oil-gas separation component according to claim 7, wherein: The guide core is cylindrical.

9. The oil and gas separation component according to claim 4, wherein: A spiral guide groove is arranged on the inner wall of the separation unit.

10. A scroll compressor, characterized in that, Apply the oil-gas separation assembly according to any one of claims 1-9; the scroll compressor includes a housing and a stationary scroll plate arranged inside the housing, the first exhaust port is arranged on the stationary scroll plate, and the oil-gas separation assembly is arranged inside the housing and connected to the stationary scroll plate.

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