Special-shaped pipe gas-liquid separator

Abstract

The invention relates to the technical field of gas-liquid separators, in particular to a special-shaped pipe gas-liquid separator which comprises a shell and a backflow pipe, the shell is provided with a containing cavity, a plurality of inlets and a flow-out opening, the backflow pipe comprises a first cylinder and a second cylinder, one side of the first cylinder and one side of the second cylinder intersect with each other and are in an 8 shape, and the first cylinder and the second cylinder are arranged in the containing cavity. The first cylinder is provided with a first channel, the second cylinder is provided with a second channel, the section of the first channel is in a moon shape, a notch is formed in one side of a circle of the moon shape, the section of the second channel is in a circle shape, the maximum radial size of the first cylinder is larger than that of the second cylinder, and the bottoms of the first channel and the second channel are communicated with each other. The top of the second channel is communicated with the outflow port, the top of the first channel is communicated with the upper end of the containing cavity, and the backflow pipe is arranged to be in the shape, so that the backflow pipe has the advantages that the requirement for the radial size of the shell is low, and the overall material consumption is relatively small while the flow is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of gas-liquid separators, and more specifically to a special-shaped tube gas-liquid separator. Background Art

[0002] The gas-liquid separator, a crucial component in a vehicle's thermal management system, is located between the evaporator and the compressor. The operating principle of the gas-liquid separator is that when the gas-liquid refrigerant mixture enters the separator, its expansion velocity decreases, causing the mixed liquid in the mixture to flow to the bottom of the separator, while the gaseous portion is discharged from the outlet and transported to an external compressor. It should be noted that the mixed liquid consists of refrigerant and liquid refrigerant. During the gas discharge process, the refrigerant is re-absorbed into the compressor, enabling the recycling of the refrigerant oil and preventing damage to the compressor caused by operating under lubrication conditions.

[0003] The gas-liquid separator includes a reflux pipe. Currently, the reflux pipes in the industry mostly adopt a U-shaped structure or a sleeve structure. The U-shaped reflux pipe refers to the U-shaped reflux pipe disclosed in the patent document (CN221146883U), and the sleeve structure refers to the sleeve-type reflux pipe disclosed in the patent document (CN218846515U), that is, the reflux pipe includes an outer tube and an inner tube, the inner tube is arranged in the outer tube, and the inner tube and the outer tube are coaxially arranged. A variation of the sleeve-type reflux pipe is disclosed in the patent document (CN116951843B), that is, the inner tube is arranged in the outer tube in an inner tangent form. It should be pointed out that for the U-shaped return pipe, due to the gap between the two channels, the radial dimension of its outer shell is relatively large, and the radial dimension requirements of the outer shell are relatively high. For the sleeve-type return pipe, the channel for the dry gas to flow in is the annular area between the outer tube and the inner tube. If the radial dimension of the inner tube is relatively large, then since the outer tube is sleeved on the outside of the inner tube, and in order to ensure the space size of the annular area for the dry gas to flow in, the overall size of the outer tube is larger, and the circumference of the outer tube is longer, the overall material consumption of the outer tube is more, and the cost is higher.

[0004] Therefore, there is a demand for providing a special-shaped tube gas-liquid separator that has low requirements on the radial size of the shell and uses relatively less overall material while ensuring the flow rate. Summary of the Invention

[0005] The main purpose of the present application is to provide a special-shaped tube gas-liquid separator, wherein the special-shaped tube gas-liquid separator includes a shell and a return pipe, the shell has a accommodating cavity, several inlets and a flow outlet, the return pipe includes a first cylinder and a second cylinder, one side of the first cylinder and the second cylinder intersect with each other and imitate an "8" shape, the first cylinder has a first channel, the second cylinder has a second channel, the cross-section of the first channel is "moon" shaped, the "moon" shape is a circle with a notch on one side, the cross-section of the second channel is circular, the maximum radial dimension of the first cylinder is greater than the maximum radial dimension of the second cylinder, the bottoms of the first channel and the second channel are connected to each other, the top of the second channel is connected to the flow outlet, and the top of the first channel is connected to the upper end of the accommodating cavity. By setting the return pipe to the above shape, the radial dimension of the shell is relatively low, and the overall material consumption is relatively low while ensuring the flow rate.

[0006] Another object of the present application is to provide a special-shaped tube gas-liquid separator, wherein the special-shaped tube gas-liquid separator also includes a baffle, which is located between the return pipe and the inlet, and the baffle is rotatably installed in the accommodating cavity. The special-shaped tube gas-liquid separator also includes a plurality of oil-absorbing foam parts and a plurality of oil-draining parts. The oil-absorbing foam parts are slidably arranged on the top of the baffle along the radial direction of the baffle, and the oil-draining parts are arranged on the side walls of the accommodating cavity. When the baffle rotates circumferentially, the oil-absorbing foam parts slide outward along the radial direction of the baffle under the action of centrifugal force, and drain oil after contacting the oil-draining parts. By setting a rotatable baffle, the separation and diffusion of the gas-liquid mixed refrigerant are actively accelerated.

[0007] Another object of the present application is to provide a special-shaped tube gas-liquid separator, which also includes a rotating motor, a rotating shaft and a center tube. The rotating motor is fixedly mounted on the outer shell, and the rotating shaft of the rotating motor is fixedly connected to the rotating shaft. The rotating shaft has a transverse through-channel and a first center hole. The center tube is arranged in the first center hole. The center tube has a second center hole, a plurality of air inlet holes and a one-way fan blade. The rotating shaft passes through the center of the baffle and is fixedly connected to the baffle, and the end of the rotating shaft away from the rotating motor is rotatably mounted on the top of the second cylinder and closes the top tube mouth of the second cylinder. The end of the center tube with the one-way fan blade extends into the second channel, and the top of the second channel is connected to the second center hole through the air inlet hole. The two ends of the transverse through-channel are respectively connected to the second center hole and the outflow port to accelerate the inflow of dry gas.

[0008] In order to achieve at least one of the above-mentioned invention objectives, the present application provides a special-shaped tube gas-liquid separator, wherein the special-shaped tube gas-liquid separator comprises: a housing having a receiving cavity, a plurality of inlet ports, and a flow outlet; A reflux pipe, the reflux pipe includes a first cylinder and a second cylinder, one side of the first cylinder and the second cylinder intersect with each other and imitate an "8" shape, the first cylinder has a first channel, the second cylinder has a second channel, the cross-section of the first channel is a "moon" shape, the "moon" shape is a circle with a notch on one side, the cross-section of the second channel is circular, the maximum radial dimension of the first cylinder is greater than the maximum radial dimension of the second cylinder, the bottoms of the first channel and the second channel are connected to each other, the top of the second channel is connected to the outflow port, and the top of the first channel is connected to the upper end of the accommodating chamber.

[0009] In one or more embodiments of the present application, the special-shaped tube gas-liquid separator further includes a shield, which is located between the reflux pipe and the inlet.

[0010] In one or more embodiments of the present application, the special-shaped tube gas-liquid separator also includes a filter assembly, which is arranged at the bottom of the return pipe. The filter assembly includes a base, a filter screen, a contoured base and a plurality of pillars. The pillars are located between the base and the contoured base, and a filter screen is provided between each adjacent two pillars. The contoured base closes the bottom of the return pipe, and the contoured base has an oil extraction hole at one end opposite to the second channel.

[0011] In one or more embodiments of the present application, the baffle is rotatably installed in the accommodating chamber, and the special-shaped tube gas-liquid separator also includes a plurality of oil-absorbing foam parts and a plurality of oil-draining parts. The oil-absorbing foam parts are slidably arranged on the top of the baffle along the radial direction of the baffle, and the oil-draining parts are arranged on the side walls of the accommodating chamber. When the baffle rotates circumferentially, the oil-absorbing foam parts slide outward along the radial direction of the baffle under the action of centrifugal force, and drain the oil after contacting the oil-draining parts.

[0012] In one or more embodiments of the present application, the special-shaped tube gas-liquid separator also includes a rotating motor, a rotating shaft and a center cylinder. The rotating motor is fixedly mounted on the outer shell, and the rotating shaft of the rotating motor is fixedly connected to the rotating shaft. The rotating shaft has a transverse through-channel and a first center hole. The center cylinder is arranged in the first center hole. The center cylinder has a second center hole, several air inlet holes and a one-way fan blade. The rotating shaft passes through the center of the baffle and is fixedly connected to the baffle, and the end of the rotating shaft away from the rotating motor is rotatably mounted on the top of the second cylinder and closes the top cylinder mouth of the second cylinder. The center cylinder has one end of the one-way fan blade extending into the second channel, and the top of the second channel is connected to the second center hole through the air inlet hole. The two ends of the transverse through-channel are respectively connected to the second center hole and the outflow outlet.

[0013] In one or more embodiments of the present application, the one-way fan blade is a soft fan blade or the one-way fan blade is hinged to the central tube.

[0014] In one or more embodiments of the present application, the outer shell includes an outer cylinder, an upper cover and a connecting cover, the outer cylinder has the accommodating cavity, the upper cover closes the accommodating cavity and is connected to the outer cylinder, the inlet is located on one side of the outer cylinder, the connecting cover is connected to the upper cover, and the connecting cover has a transfer cavity, the top of one side of the transfer cavity is provided with the outflow port, the transverse through-channel is connected to the transfer cavity, and the rotating shaft passes through the connecting cover.

[0015] In one or more embodiments of the present application, the special-shaped tube gas-liquid separator also includes a battery pack and a disassembly cover, the battery pack is electrically connected to the rotating motor, the rotating motor is fixedly mounted on the connection cover, the battery pack and the rotating motor are both covered by the disassembly cover, and the disassembly cover is detachably connected to the connection cover.

[0016] In one or more embodiments of the present application, the oil drain piece is rotatably mounted on the outer shell, and the oil drain piece includes a planar portion, an arc portion, and a pressing portion. A torsion spring is provided at the rotating connection between the oil drain piece and the outer shell, and the two ends of the torsion spring are respectively connected to the oil drain piece and the outer shell, and a buffer piece is provided on the outer shell.

[0017] In one or more embodiments of the present application, the baffle cover also has a protruding column, which has a guide hole. The special-shaped tube gas-liquid separator also includes a spring and a metal part. The metal part is slidably arranged on the guide hole. The metal part is fixedly connected to the oil-absorbing foaming part, and the two ends of the spring are respectively connected to the metal part and the protruding column.

[0018] In the present application, the special-shaped tube gas-liquid separator includes an outer shell and a reflux pipe. The outer shell has a accommodating cavity, several inlets and a flow outlet. The reflux pipe includes a first cylinder and a second cylinder. One side of the first cylinder and the second cylinder intersects with each other and imitates an "8" shape. The first cylinder has a first channel, and the second cylinder has a second channel. The cross-section of the first channel is "moon" shaped. The "moon" shape is a circle with a notch on one side. The cross-section of the second channel is circular. The maximum radial dimension of the first cylinder is greater than the maximum radial dimension of the second cylinder. The bottoms of the first channel and the second channel are connected to each other, the top of the second channel is connected to the flow outlet, and the top of the first channel is connected to the upper end of the accommodating cavity. By setting the reflux pipe to the above shape, the requirements for the radial dimensions of the outer shell are low, and while ensuring the flow rate, the overall material consumption is relatively small. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] These and / or other aspects and advantages of the present application will become more clear and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which: Figure 1 The figure shows a structural schematic diagram of a special-shaped tube gas-liquid separator of the present application; Figure 2 The figure shows a schematic diagram of the structure of the return pipe; Figure 3 The figure shows a schematic diagram of the structure of the return pipe from a certain perspective; Figure 4 The figure shows a structural schematic diagram of a special-shaped tube gas-liquid separator from a certain perspective; Figure 5 The diagram shows a schematic diagram of a structure in which a filter assembly is installed at the bottom of the return pipe; Figure 6 The figure shows a schematic structural diagram of the filter assembly; Figure 7 Pictured Figure 1 A local enlarged view of point C; Figure 8 The figure shows a structural schematic diagram of the shield part from a certain perspective; Figure 9 Pictured Figure 8 A local enlarged view of point D. DETAILED DESCRIPTION

[0020] The terms and words used in the following description and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustration purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0021] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0022] Although ordinal numbers such as "first," "second," and the like will be used to describe various components, these are not intended to limit those components. The terms are used solely to distinguish one component from another. For example, a first component could be referred to as a second component, and similarly, a second component could be referred to as a first component without departing from the teachings of the inventive concept. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] The terms used herein are for the purpose of describing various embodiments only and are not intended to be limiting. As used herein, the singular is intended to include the plural, unless the context clearly indicates otherwise. It will also be understood that the terms "comprising" and / or "having" when used in this specification specify the presence of a stated feature, number, step, operation, component, element, or combination thereof, and do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.

[0024] Schematic diagram of special-shaped tube gas-liquid separator, refer to Figures 1 to 9 According to a preferred embodiment of the present invention, a special-shaped tube gas-liquid separator includes a shell 10 and a reflux pipe 20.

[0025] Specifically, if Figures 1 to 4 As shown, the shell 10 has a accommodating cavity 101, several inlet ports 102 and a flow outlet 103; in addition, the return pipe 20 includes a first cylinder 201 and a second cylinder 202, one side of the first cylinder 201 and the second cylinder 202 intersect with each other and imitate an "8" shape, the first cylinder 201 has a first channel 2011, the second cylinder 202 has a second channel 2021, the cross-section of the first channel 2011 is "moon" shaped, and the "moon" shape is a circle with a notch on one side, the cross-section of the second channel 2021 is circular, the maximum radial dimension of the first cylinder 201 is greater than the maximum radial dimension of the second cylinder 202, the bottoms of the first channel 2011 and the second channel 2021 are connected to each other, the top of the second channel 2021 is connected to the flow outlet 103, and the top of the first channel 2011 is connected to the upper end of the accommodating cavity 101.

[0026] It should be noted that, by making one side of the first cylinder 201 and the second cylinder 202 intersect with each other, the U-shaped channel in the middle is omitted and the distance between the first cylinder 201 and the second cylinder 202 is shortened compared to the U-shaped return pipe 20 in the prior art, which is suitable for the shell 10 with a smaller radial dimension and has the advantage of lower requirements for the radial dimension of the shell 10; in addition, compared with the sleeve-type return pipe 20 in the prior art, the first cylinder 201 and the first channel 2011, while ensuring the flow cross-sectional area of ​​the drying fluid, the first cylinder 201 is adjacent to the second cylinder 202 rather than being sleeved, so that the amount of the first cylinder 201 is less, which has the advantage of ensuring the flow while using relatively less overall material.

[0027] Furthermore, in order to allow the liquid in the gas-liquid mixed refrigerant to flow along the side walls of the accommodating chamber 101 to the bottom of the accommodating chamber 101, the special-shaped tube gas-liquid separator further includes a baffle 30, which is located between the return pipe 20 and the inlet 102. After the gas-liquid mixed refrigerant flows into the accommodating chamber 101 from the inlet 102, it first contacts the baffle 30 and then spreads along the baffle 30 to the outside of the baffle 30.

[0028] In addition, if Figure 1 、 Figure 5 and Figure 6 As shown, the special-shaped tube gas-liquid separator also includes a filter assembly 40, which is arranged at the bottom of the return pipe 20. The filter assembly 40 includes a base 401, a filter screen, a contoured base 403 and a plurality of pillars 404. The pillars 404 are located between the base 401 and the contoured base 403. A filter screen is provided between each adjacent two pillars 404. The contoured base 403 closes the bottom of the return pipe 20, and the contoured base 403 has an oil extraction hole 405 at one end opposite to the second channel 2021.

[0029] It should be noted that the dry gas portion of the gas-liquid mixed refrigerant enters the first channel 2011 of the first cylinder 201 after passing through the annular area between the baffle 30 and the side wall of the accommodating chamber 101, and after flowing through the bottom of the first channel 2011, enters the bottom of the second channel 2021, moves upward along the second channel 2021 and is discharged from the outflow port 103; while the liquid portion of the gas-liquid mixed refrigerant flows along the side wall of the accommodating chamber 101 to the bottom wall of the accommodating chamber 101, and the large particles of impurities in the liquid portion are filtered by the filter. The liquid portion includes refrigerant oil and liquid refrigerant. When the dry gas flows through the connection between the first channel 2011 and the second channel 2021, a negative pressure is formed and the refrigerant oil is drawn into the second channel 2021 from the oil extraction hole 405 and mixed with the dry gas, and then discharged from the outflow port 103 together.

[0030] Furthermore, in the prior art, the shield 30 is fixedly disposed in the accommodating cavity 101, and the gas and liquid passively flow toward the accommodating cavity 101 along the outer contour of the shield 30; and in this application, referring to Figure 1 The baffle 30 is rotatably installed in the accommodating chamber 101. It should be noted that by making the baffle 30 rotate circumferentially and generating centrifugal force, when the gas-liquid mixed refrigerant contacts the baffle 30 in a rotating state, the gas part and the liquid part are thrown to the outside under the action of centrifugal force. Compared with the passive flow gas-liquid mixed refrigerant in the prior art, the present application actively dredges the gas-liquid mixed refrigerant to the outside after utilizing centrifugal force.

[0031] In addition, if Figure 1 and Figure 7 As shown, the special-shaped tube gas-liquid separator further includes a plurality of oil-absorbing foaming parts 501 , the material of the oil-absorbing foaming parts 501 is preferably oil-absorbing polyolefin, and the oil-absorbing foaming parts 501 are slidably arranged on the top of the baffle 30 along the radial direction of the baffle 30 .

[0032] It should be noted that when the oil portion of the gas-liquid mixed refrigerant is thrown outward, it is absorbed by the oil-absorbing foaming member 501, thereby accelerating the separation speed of the liquid portion and the gas in the gas-liquid mixed refrigerant.

[0033] In addition, if Figure 1 and Figure 7 As shown, the special-shaped tube gas-liquid separator further includes an oil draining member 60 , and the oil draining member 60 is provided on the side wall of the accommodating cavity 101 .

[0034] It should be noted that when the shield 30 rotates circumferentially, the oil-absorbing foaming member 501 slides outward along the radial direction of the shield 30 under the action of centrifugal force, and drains oil after contacting the oil draining member 60 .

[0035] Furthermore, in order to realize the rotation installation of the shield 30 in the accommodating cavity 101, as shown in FIG. Figure 1 As shown, the special-shaped tube gas-liquid separator also includes a rotating motor 701, a rotating shaft 702 and a central tube 703. The rotating motor 701 is fixedly mounted on the housing 10, and the rotating shaft of the rotating motor 701 is fixedly connected to the rotating shaft 702. The rotating shaft 702 has a transverse through-channel 7021 and a first central hole 7022. The central tube 703 is arranged in the first central hole 7022. The central tube 703 has a second central hole 7031, a plurality of air inlet holes 7032 and a one-way fan blade 7033. The rotating shaft 702 passes through the shield 3 0 and is fixedly connected to the baffle 30, and the end of the rotating shaft 702 facing away from the rotating motor 701 is rotatably mounted on the top of the second cylinder 202 through a bearing and closes the top tube mouth of the second cylinder 202, the center cylinder 703 has one end of the one-way fan blade 7033 extending into the second channel 2021, the top of the second channel 2021 is connected with the second center hole 7031 through the air inlet hole 7032, and the two ends of the transverse through-channel 7021 are respectively connected with the second center hole 7031 and the outflow outlet 103.

[0036] It should be noted that when the rotating shaft of the rotating motor 701 rotates, the rotating shaft 702 rotates circumferentially, and drives the baffle 30 to rotate circumferentially. In addition, when the rotating shaft 702 rotates circumferentially, the central cylinder 703 rotates synchronously, and the one-way blades 7033 rotate accordingly, and a negative pressure zone is generated at one end of the one-way blades 7033 near the bottom of the second cylinder 202, accelerating the flow of dry gas from the first channel 2011 to the top of the second channel 2021, and then from the second center hole 7031 through the transverse through channel 7021, and finally flowing to the outflow port 103. It is obvious that the rotation of the rotating shaft of the rotating motor 701 not only causes the outer cover to rotate circumferentially, accelerating the outward flow of the gas-liquid mixing brake member, but also causes the one-way blades 7033 to rotate circumferentially and generate a negative pressure zone, accelerating the discharge of dry gas.

[0037] Furthermore, to facilitate the placement of the one-way blades 7033 into the second channel 2021, in one embodiment of the present application, the one-way blades 7033 are soft blades or are hinged to the central tube 703. That is, the one-way blades 7033 hang freely under the action of gravity, extending into the second channel 2021, and when the central tube 703 rotates circumferentially, the one-way blades 7033 unfold and rotate circumferentially under the action of centrifugal force.

[0038] Furthermore, in this application, Figure 1 and Figure 4 As shown, the shell 10 includes an outer cylinder 104, an upper cover 105 and a connecting cover 106. The outer cylinder 104 has the accommodating chamber 101, the upper cover 105 closes the accommodating chamber 101 and is connected to the outer cylinder 104, the inlet 102 is located on one side of the outer cylinder 104, the connecting cover 106 is connected to the upper cover 105, and the connecting cover 106 has a transfer chamber 1061, the top of one side of the transfer chamber 1061 is provided with the outflow port 103, the transverse through channel 7021 is connected to the transfer chamber 1061, and the rotating shaft 702 passes through the connecting cover 106.

[0039] In addition, in order to realize the power supply to the rotating motor 701, as shown in FIG. Figure 1 As shown, the special-shaped tube gas-liquid separator also includes a battery pack 704 and a disassembly cover 705. The battery pack 704 is electrically connected to the rotating motor 701. The rotating motor 701 is fixedly mounted on the connection cover 106. The battery pack 704 and the rotating motor 701 are both covered by the disassembly cover 705. The disassembly cover 705 is detachably connected to the connection cover 106.

[0040] In addition, in order to reduce the impact force of the oil absorbing foaming member 501 when it contacts the oil draining member 60, Figure 8 and Figure 9 As shown, the oil drain piece 60 is rotatably mounted on the shell 10, and the oil drain piece 60 includes a flat portion 601, an arc portion 602 and a pressing portion 603. A torsion spring is provided at the rotational connection between the oil drain piece 60 and the shell 10, and the two ends of the torsion spring are respectively connected to the oil drain piece 60 and the shell 10. A buffer piece 107 is provided on the shell 10.

[0041] It should be noted that, when the oil draining member 60 is impacted by the oil absorbing foaming member 501 , the pressing portion 603 contacts the buffer member 107 after rotating through a predetermined angle.

[0042] In addition, in order to realize that the oil absorbing foaming member 501 is slidably arranged on the shield 30, as shown in FIG. Figure 7 and Figure 8 As shown, the shield 30 also has a boss 502, and the boss 502 has a guide hole. The special-shaped tube gas-liquid separator also includes a spring 503 and a metal part 504. The metal part 504 is slidably set on the guide hole. The metal part 504 is fixedly connected to the oil-absorbing foaming part 501, and the two ends of the spring 503 are respectively connected to the metal part 504 and the boss 502.

[0043] It should be noted that the metal member 504 is heavy so that it can overcome the elastic force of the spring 503 under the action of centrifugal force and slide outward, thereby driving the oil absorbing foaming member 501 to contact the oil draining member 60.

[0044] In addition, the top surface of the shield 30 is provided with a plurality of guide grooves.

[0045] In summary, the special-shaped tube gas-liquid separator based on the embodiment of the present application is explained, which provides the special-shaped tube gas-liquid separator with advantages such as lower requirements on the radial size of the shell, and relatively less overall material consumption while ensuring the flow rate.

[0046] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from these principles.

Claims

1. A special-shaped tube gas-liquid separator, characterized by: The special-shaped tube gas-liquid separator includes a housing having a receiving cavity, a plurality of inlet ports, and a flow outlet; A reflux pipe, the reflux pipe includes a first cylinder and a second cylinder, one side of the first cylinder and the second cylinder intersect with each other and imitate an "8" shape, the first cylinder has a first channel, the second cylinder has a second channel, the cross-section of the first channel is a "moon" shape, the "moon" shape is a circle with a notch on one side, the cross-section of the second channel is circular, the maximum radial dimension of the first cylinder is greater than the maximum radial dimension of the second cylinder, the bottoms of the first channel and the second channel are connected to each other, the top of the second channel is connected to the outflow port, and the top of the first channel is connected to the upper end of the accommodating chamber.

2. The special-shaped tube gas-liquid separator according to claim 1, characterized in that: The special-shaped tube gas-liquid separator further includes a shield, which is located between the reflux pipe and the inlet.

3. The special-shaped tube gas-liquid separator according to claim 1, characterized in that: The special-shaped tube gas-liquid separator also includes a filter assembly, which is arranged at the bottom of the return pipe. The filter assembly includes a base, a filter screen, a contoured base and a plurality of pillars. The pillars are located between the base and the contoured base. A filter screen is provided between each adjacent two pillars. The contoured base closes the bottom of the return pipe and has an oil extraction hole at one end of the contoured base facing the second channel.

4. The special-shaped tube gas-liquid separator according to claim 2, characterized in that: The baffle is rotatably installed in the accommodating chamber. The special-shaped tube gas-liquid separator also includes a plurality of oil-absorbing foam parts and a plurality of oil-draining parts. The oil-absorbing foam parts are slidably arranged on the top of the baffle along the radial direction of the baffle, and the oil-draining parts are arranged on the side walls of the accommodating chamber. When the baffle rotates circumferentially, the oil-absorbing foam parts slide outward along the radial direction of the baffle under the action of centrifugal force, and drain the oil after contacting the oil-draining parts.

5. The special-shaped tube gas-liquid separator according to claim 4, characterized in that: The special-shaped tube gas-liquid separator also includes a rotating motor, a rotating shaft and a center cylinder. The rotating motor is fixedly mounted on the outer shell, and the rotating shaft of the rotating motor is fixedly connected to the rotating shaft. The rotating shaft has a transverse through-channel and a first center hole. The center cylinder is arranged in the first center hole. The center cylinder has a second center hole, a plurality of air inlet holes and a one-way fan blade. The rotating shaft passes through the center of the baffle and is fixedly connected to the baffle, and the end of the rotating shaft away from the rotating motor is rotatably mounted on the top of the second cylinder and closes the top cylinder mouth of the second cylinder. The center cylinder has one end of the one-way fan blade extending into the second channel, and the top of the second channel is connected to the second center hole through the air inlet hole. The two ends of the transverse through-channel are respectively connected to the second center hole and the outflow outlet.

6. The special-shaped tube gas-liquid separator according to claim 5, characterized in that: The one-way fan blade is a soft fan blade or the one-way fan blade is hinged to the central tube.

7. The special-shaped tube gas-liquid separator according to claim 5, characterized in that: The outer shell includes an outer cylinder, an upper cover and a connecting cover. The outer cylinder has the accommodating cavity. The upper cover seals the accommodating cavity and is connected to the outer cylinder. The inlet is located on one side of the outer cylinder. The connecting cover is connected to the upper cover and has a transfer cavity. The top of one side of the transfer cavity is provided with the outflow port. The transverse through-channel is connected to the transfer cavity. The rotating shaft passes through the connecting cover.

8. The special-shaped tube gas-liquid separator according to claim 7, characterized in that: The special-shaped tube gas-liquid separator also includes a battery pack and a disassembly cover. The battery pack is electrically connected to the rotating motor, and the rotating motor is fixedly mounted on the connection cover. The battery pack and the rotating motor are both covered by the disassembly cover, and the disassembly cover is detachably connected to the connection cover.

9. The special-shaped tube gas-liquid separator according to claim 4, characterized in that: The oil drain piece is rotatably mounted on the outer shell. The oil drain piece includes a flat portion, an arc portion and a pressing portion. A torsion spring is provided at the rotational connection between the oil drain piece and the outer shell. The two ends of the torsion spring are respectively connected to the oil drain piece and the outer shell. A buffer piece is provided on the outer shell.

10. The special-shaped tube gas-liquid separator according to claim 4, characterized in that: The shield also has a boss, which has a guide hole. The special-shaped tube gas-liquid separator also includes a spring and a metal part. The metal part is slidably arranged on the guide hole. The metal part is fixedly connected to the oil-absorbing foaming part. The two ends of the spring are respectively connected to the metal part and the boss.

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