Oil and gas separation device and compressor

Abstract

The application discloses an oil-gas separation device and a compressor, wherein the oil-gas separation device comprises a shell, a separation cavity is formed in the shell, and an air inlet of the oil-gas separation device is communicated with the separation cavity; an inner cylinder is arranged in the separation cavity, an air inlet passage is formed between an outer wall of the inner cylinder and an inner wall of the separation cavity, and the air inlet is arranged at a position of the air inlet passage; a plurality of baffling bosses are arranged in the air inlet passage in a staggered mode, and all the baffling bosses separate the air inlet passage into baffle flow channels. The oil-gas separation device and the compressor effectively solve the problems of low separation efficiency and poor separation effect of the oil-gas separation device in the prior art.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and more specifically, to an oil-gas separation device and a compressor. Background Technology

[0002] In screw compressors, refrigerant oil is needed for lubrication between the rotors to reduce compressor noise. The refrigerant oil also reduces gas leakage during rotor meshing, improving compressor performance. Therefore, during actual operation, the compressor discharges not only gaseous refrigerant but also tiny droplets of refrigerant oil. Screw compressor units often employ external oil-gas separators to separate the gaseous refrigerant and refrigerant oil droplets discharged from the compressor. The separated refrigerant oil returns to the compressor oil tank for further lubrication, while the gaseous refrigerant enters the condenser and condenses into a medium-temperature, high-pressure liquid refrigerant. By filtering the discharged lubricating oil through the oil-gas separator and returning it to the compressor, not only is it prevented from entering the refrigerant system and reducing heat exchanger efficiency, but it also effectively prevents compressor shutdown due to oil shortage.

[0003] If the oil-gas separator has low separation efficiency, refrigeration oil will enter the refrigerant circulation and adhere to the heat exchange tube walls of the evaporator and condenser, forming an oil film that hinders heat exchange, reduces the heat transfer efficiency of the heat exchanger, and lowers the unit's energy efficiency. Simultaneously, insufficient oil in the compressor will lead to a lack of lubrication between components, easily damaging the compressor.

[0004] The separation mechanism of the external oil-gas separator includes centrifugal separation, gravity separation, filter adsorption separation, and collision separation. After the refrigeration oil is separated, it is collected at the bottom of the container, so a return oil pipe, a level gauge or an oil level mirror is installed at the bottom.

[0005] Existing oil-gas separation devices generally employ a swirl-type structure. Although these devices are large in size, they suffer from insufficient effective separation and low efficiency. Furthermore, the complex internal structure and unreasonable structural design contribute to poor oil-gas separation performance.

[0006] In summary, existing oil-gas separation devices have low separation efficiency and poor separation effect. Summary of the Invention

[0007] This invention provides an oil-gas separation device and compressor to solve the problems of low separation efficiency and poor separation effect of existing oil-gas separation devices.

[0008] To achieve the above objectives, the present invention provides an oil-gas separation device, comprising: a shell, wherein a separation chamber is formed within the shell, and the air inlet of the oil-gas separation device communicates with the separation chamber; an inner cylinder, wherein the inner cylinder is disposed within the separation chamber, and an air inlet channel is formed between the outer wall of the inner cylinder and the inner wall of the separation chamber, and the air inlet is disposed at the location of the air inlet channel; and a plurality of baffle protrusions, wherein the plurality of baffle protrusions are staggered within the air inlet channel, and all the baffle protrusions divide the air inlet channel into baffle flow channels.

[0009] Furthermore, multiple baffle protrusions are respectively connected to the outer wall of the inner cylinder and the inner wall of the separation chamber; the baffle protrusions connected to the outer wall of the inner cylinder and the baffle protrusions connected to the inner wall of the separation chamber are arranged alternately.

[0010] Furthermore, a first filter screen is disposed within the air intake channel and is laid on the outer wall of the inner cylinder; a second filter screen is disposed within the air intake channel and is laid on the inner wall of the separation chamber.

[0011] Furthermore, the inner cylinder is cylindrical, the air intake channel is an annular channel, and the airflow entering through the air intake flows spirally downward along the annular channel; all the deflector protrusions are staggered and arranged circumferentially along the annular channel.

[0012] Furthermore, the inner cylinder is fixedly connected to the shell, and the internal space of the inner cylinder and the shell form an air outlet channel, which is connected to the air outlet of the oil-gas separator.

[0013] Furthermore, it also includes: multiple baffles, which are connected to the inner wall of the inner cylinder and located in the air outlet channel, and the multiple baffles are arranged alternately.

[0014] Furthermore, it also includes: an air equalization plate, which is connected to the inner wall of the inner cylinder and located in the air outlet channel, and has a plurality of air equalization holes; the air equalization plate is located between the baffle plate and the air outlet.

[0015] Furthermore, the gas equalization plate is conical, and the diameter of the gas equalization plate gradually increases from the first end to the second end, with the first end of the gas equalization plate facing the bottom of the separation chamber.

[0016] Furthermore, it also includes: a filter element, which is fixedly connected in the air outlet channel and located between the air distribution plate and the air outlet; the filter element is funnel-shaped, and the diameter of the filter element gradually increases from the first end to the second end, the diameter of the second end of the filter element is the same as the inner wall diameter of the inner cylinder, and the filter element is used to filter all the airflow flowing out from the air outlet.

[0017] Furthermore, it also includes: a support rib, which is fixedly connected to the inner wall of the inner cylinder, and the support rib supports and fixes the filter element; the support rib is funnel-shaped and matches the shape of the filter element, and the ribs of the support rib guide the oil droplets adsorbed by the filter element.

[0018] Furthermore, the structure of the filter element satisfies the following formula:

[0019] l=(h 2 +d 2 / 4) 0.5

[0020] Vmax=0.2[(ρ g -ρ l ) / ρ l ] 0.5

[0021] V = Q / [πl] 2 (d / l)]*10 6

[0022] 0.2≤V≤Vmax;

[0023] in,

[0024] Vmax is the maximum gas flow velocity through the filter element, in m / s;

[0025] V represents the actual gas flow velocity through the filter element, in m / s.

[0026] Q represents the air intake volume of the oil separator, in meters. 3 / s;

[0027] ρ g Density of entrained refrigeration oil, unit: kg / m³ 3 ;

[0028] ρ l The density of the intake gas is expressed in kg / m³. 3 ;

[0029] d is the bottom diameter of the funnel-shaped filter element, in mm;

[0030] h represents the height of the funnel-shaped filter element, in mm.

[0031] l represents the height of the inclined side of the funnel-shaped filter element, in mm.

[0032] According to another aspect of the invention, a compressor is provided, comprising the oil-gas separation device according to any one of claims 1 to 11.

[0033] Furthermore, the compressor is a screw compressor.

[0034] The air intake channel is formed between the outer wall of the inner cylinder and the inner wall of the separation chamber. The gaseous refrigerant discharged from the compressor, carrying oil droplets, enters the air intake channel through the inlet and flows downwards in a rotating manner. Because multiple baffle protrusions form a baffle flow path within the air intake channel, the baffle space increases the gas travel distance and the oil separation time. Furthermore, the compressor exhaust has a certain velocity. Since the oil droplets and gaseous refrigerant have different densities, the gas is deflected within the baffle flow path due to inertia. The oil droplets, with their higher density, cannot deflect or have difficulty deflecting, thus separating in the air intake channel, thereby improving the gas-liquid separation effect. The structure of this invention ensures separation efficiency while allowing for a more compact oil-gas separation device. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the internal structure of the oil-gas separation device according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of one cross-section of the oil-gas separation device according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of another cross-section of the oil-gas separation device according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the external structure of the oil-gas separation device according to an embodiment of the present invention;

[0039] Figure 5 This is a cross-sectional schematic diagram of the gas equalization plate of the oil-gas separation device according to an embodiment of the present invention;

[0040] Figure 6 This is a top view schematic diagram of the gas equalization plate of the oil-gas separation device according to an embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the filter element of the oil-gas separation device according to an embodiment of the present invention;

[0042] Figure 8 This is a top view schematic diagram of the filter element of the oil-gas separation device according to an embodiment of the present invention;

[0043] Figure 9 This is a three-dimensional schematic diagram of the support ribs located at the bottom of the filter element in the oil-gas separation device of this embodiment of the invention;

[0044] Figure 10 This is a front view schematic diagram of the support rib located at the bottom of the filter element in the oil-gas separation device of this embodiment of the invention;

[0045] Figure 11 This is a three-dimensional schematic diagram of the support rib located at the top of the filter element in the oil-gas separation device of this embodiment of the invention;

[0046] Figure 12 This is a front view schematic diagram of the support rib located at the top of the filter element in the oil-gas separation device of this embodiment of the invention;

[0047] Figure 13 This is a schematic diagram of the baffle plate of the oil-gas separation device according to an embodiment of the present invention.

[0048] Figure 14 This is a schematic diagram of the baffle boss and inner cylinder of the oil-gas separation device according to an embodiment of the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0051] See Figures 1 to 14 As shown, according to an embodiment of the present invention, an oil-gas separation device is provided, including a housing 10, an inner cylinder 20, and a plurality of baffle protrusions 30. A separation chamber 11 is formed inside the housing 10, and the air inlet 12 of the oil-gas separation device communicates with the separation chamber 11. The inner cylinder 20 is disposed inside the separation chamber 11, and an air inlet channel 13 is formed between the outer wall of the inner cylinder 20 and the inner wall of the separation chamber 11. The air inlet 12 is disposed at the position of the air inlet channel 13. The plurality of baffle protrusions 30 are staggered in the air inlet channel 13, and all the baffle protrusions 30 divide the air inlet channel 13 into baffle flow channels.

[0052] Combination Figure 1 and Figure 2As shown, the air intake channel 13 is formed between the outer wall of the inner cylinder 20 and the inner wall of the separation chamber 11. The gaseous refrigerant discharged from the compressor, carrying oil droplets, enters the air intake channel from the air inlet and flows downward in a rotating manner. Because the multiple baffle protrusions 30 form a baffle channel within the air intake channel 13, the baffle space of the baffle channel increases the gas travel distance and the oil separation time. Furthermore, the compressor exhaust has a certain velocity. Since the oil droplets and gaseous refrigerant have different densities, due to inertia, the gas is deflected within the baffle channel. The oil droplets, with their higher density, cannot turn or have difficulty turning, thus separating in the air intake channel, thereby improving the gas-liquid separation effect. The structure of this invention ensures separation efficiency while allowing for a more compact oil-gas separation device.

[0053] See Figure 2 and Figure 14 Specifically, multiple flow-deflecting protrusions 30 are respectively connected to the outer wall of the inner cylinder 20 and the inner wall of the separation cavity 11; the flow-deflecting protrusions 30 connected to the outer wall of the inner cylinder 20 and the flow-deflecting protrusions 30 connected to the inner wall of the separation cavity 11 are staggered and form the flow-deflecting channel.

[0054] The baffle boss 30 is connected to the outer wall of the inner cylinder and the inner wall of the separation chamber respectively. The advantage of this structure is that the structure is more compact and can make full use of the structural space to achieve the desired structural effect.

[0055] It should be noted that the deflector protrusion 30 is a strip-shaped protrusion that extends from top to bottom, forming a protrusion structure that can affect the airflow. The deflector protrusions 30 are staggered to form a deflector flow channel, and the height of the deflector protrusion 30 can be proportionally set according to the diameter of the air intake channel.

[0056] Preferably, the oil-gas separator further includes a first filter screen 41 and a second filter screen 42. The first filter screen 41 is disposed within the air intake channel 13 and is laid on the outer wall of the inner cylinder 20. The second filter screen 42 is disposed within the air intake channel 13 and is laid on the inner wall of the separation chamber 11.

[0057] The first and second filters, installed within the intake channel, cooperate with the baffle boss. These filters not only separate the airflow within the intake channel, causing oil droplets to adhere to them, but also allow the oil droplets separated by the baffle to flow along the sidewall of the baffle boss to its root, where they are then adsorbed onto the first and second filters. The airflow within the intake channel also helps to carry the oil droplets down or onto the two filters, thus increasing oil separation efficiency and enabling the oil-gas separator to collect the separated refrigerant oil more quickly.

[0058] Combination Figure 2 As shown, the inner cylinder 20 is cylindrical, and the air intake channel 13 is an annular channel. The airflow entering through the air intake 12 flows spirally downward along the annular channel. All the deflector protrusions 30 are staggered and spaced along the circumference of the annular channel. The annular channel allows for more stable airflow, preventing significant flow around the air and ensuring more stable return air efficiency.

[0059] The outer diameter of the inner cylinder is determined by the refrigerant flow velocity in the intake channel. Generally, the gaseous refrigerant flow velocity in the intake channel should not exceed 25 m / s (if the flow velocity in the intake channel is too high, the kinetic energy of the oil droplets impacting the inner wall of the shell and the outer wall of the inner cylinder will be greater, and more fine and dispersed oil droplets will be generated after the impact, which is not conducive to gas-liquid separation). The outer diameter of the inner cylinder is generally 30%-90% of the shell diameter; the bottom surface of the inner cylinder must be lower than the air inlet and the distance must be more than 1 times the diameter of the air inlet.

[0060] To make full use of the internal space, the air inlet height is set as high as possible to extend the gas's travel distance within the oil separator and improve the separation effect. Since the inner cylinder length has a significant impact on the gas travel distance, if the inner cylinder length is too short, the gas entering through the air inlet cannot rotate and separate between the space inside the shell and the outer space of the inner cylinder, and will directly bypass the bottom surface of the inner cylinder and enter the inner side of the inner cylinder.

[0061] Combination Figure 1 and Figure 3 As shown, the inner cylinder 20 is fixedly connected to the shell 10, and the internal space of the inner cylinder 20 and the shell 10 form an air outlet channel 21, which is connected to the air outlet 14 of the oil-gas separator.

[0062] After being separated in the separation chamber, the gas flows upward from the gas outlet channel 21 inside the inner cylinder and flows out through the gas outlet at the top.

[0063] The oil-gas separation device also includes multiple baffles 50, which are connected to the inner wall of the inner cylinder 20 and located in the gas outlet channel 21. The multiple baffles 50 are arranged alternately.

[0064] The gaseous refrigerant swirls and flows through the inlet channel, then passes through the lower part of the separation chamber and enters the outlet channel inside the inner cylinder. It is then deflected by multiple baffles. Due to the gaseous refrigerant undergoing multiple large-angle turns within the baffle channels, and driven by inertia, oil droplets collide with the inner cylinder and baffles, resulting in adsorption and thus achieving separation.

[0065] See the structure of the baffle. Figure 13The baffle plate is generally an arc-shaped structure. The gaseous refrigerant flows within the channels formed by the upper and lower spaced channels and the arc-shaped notch on the baffle plate. The flow velocity of the gaseous refrigerant within these channels is generally no greater than 5 m / s. The outer diameter of the baffle plate is the same as the inner diameter of the inner cylinder and is fully welded to the inner side of the inner cylinder. The area of ​​the baffle plate notch is determined based on the gas flow velocity, ensuring that the gas flow velocity at the notch does not exceed 5 m / s; and to achieve the baffle effect, the chord length of the notch does not exceed 80% of the baffle plate diameter. At least two baffle plates are required, and the specific number can be selected based on a comprehensive consideration of the internal space of the oil separator, the pressure loss at the inlet and outlet of the oil separator, and the separation effect.

[0066] Combination Figure 5 and Figure 6 As shown, the oil-gas separator also includes a gas equalization plate 60, which is connected to the inner wall of the inner cylinder 20 and located within the gas outlet channel 21. The gas equalization plate 60 has multiple gas equalization holes 61; the gas equalization plate 60 is located between the baffle plate 50 and the gas outlet 14. Due to the influence of the baffle plate, the uniformity of the flow field is poor after the gaseous refrigerant flows out from the baffle plate notch. Therefore, a porous gas equalization plate is provided at the top of the top baffle plate, which can re-equalize the airflow and make its uniformity conform to the standard.

[0067] Preferably, the gas equalization plate 60 is conical, and its diameter gradually increases from the first end to the second end. The first end of the gas equalization plate 60 faces the bottom of the separation chamber 11. The gas equalization plate has a funnel-shaped structure, and its second end is fully welded to the inner wall of the inner cylinder.

[0068] The number of air passages on the gas equalization plate is determined by the gas flow area, and the flow velocity through the air passages is generally no greater than 3 m / s. The air passages are typically circular, but can also be square, elliptical, or other shapes. The funnel shape of the gas equalization plate facilitates the separation of oil droplets intercepted by the plate.

[0069] Combination Figure 7 and Figure 8 As shown, the oil-gas separation device also includes a filter element 70, which is fixedly connected in the gas outlet channel 21 and is located between the gas equalization plate 60 and the gas outlet 14.

[0070] The filter element 70 is funnel-shaped, and the diameter of the filter element 70 gradually increases from the first end to the second end. The diameter of the second end of the filter element 70 is the same as the inner wall diameter of the inner cylinder 20. The filter element 70 is used to filter all the airflow flowing out from the air outlet 14.

[0071] Funnel-shaped filter elements are used to separate small oil droplets dispersed in gaseous refrigerant. This structure not only effectively increases the filtration area and improves separation efficiency, but also allows the filtered oil droplets to quickly detach from the filter screen, reducing their impact on the screen's separation efficiency.

[0072] The diameter of the second end of the filter element 70 is the same as the diameter of the inner wall of the inner cylinder 20, which ensures that all gas passes through the filter screen and enters the outlet.

[0073] The oil-gas separator also includes a support rib 80, which is fixedly connected to the inner wall of the inner cylinder 20 and supports and fixes the filter element 70.

[0074] The support rib 80 is funnel-shaped and matches the shape of the filter element 70. The ribs of the support rib 80 guide the oil droplets adsorbed by the filter element 70.

[0075] In this embodiment, two support ribs are provided, one at the top and one at the bottom of the filter element, respectively. The structure of the support rib at the bottom of the filter element is described in [reference needed]. Figure 9 and Figure 10 See the support rib structure located at the top of the filter element. Figure 11 and Figure 12 .

[0076] By setting funnel-shaped support ribs at both the top and bottom of the filter element, and welding the support ribs to the inner wall of the inner cylinder, the filter element is supported and fixed. At the same time, the ribs of the support ribs guide the oil droplets adsorbed by the filter element. The guided oil droplets collect at the bottom of the support ribs and are discharged through the drainage rod (which is also a rib of the support rib) set at the bottom of the support ribs, thereby reducing the impact of adsorbed oil droplets on the separation efficiency of the filter element.

[0077] To ensure separation efficiency, the flow velocity of the gaseous refrigerant through the filter element should be V ≤ Vmax (maximum flow velocity, typically V is 0.8 times Vmax), and V ≥ 0.2 m / s (if the flow velocity is too low, gas entrains liquid droplets that wrap around the filter wires, preventing collision and separation). The taper of the funnel-shaped filter screen is determined based on the filter element area, and according to manufacturing and assembly requirements, the ratio of the height to the major diameter of the funnel-shaped filter element should not exceed 3.

[0078] The structure of the filter element 70 satisfies the following formula:

[0079] l=(h 2 +d 2 / 4) 0.5

[0080] Vmax=0.2[(ρ g -ρ l ) / ρ l ] 0.5

[0081] V = Q / [πl] 2 (d / l)]*10 6

[0082] 0.2≤V≤Vmax;

[0083] in,

[0084] Vmax is the maximum gas flow velocity through the filter element, in m / s;

[0085] V represents the actual gas flow velocity through the filter element, in m / s.

[0086] Q represents the air intake volume of the oil separator, in meters. 3 / s;

[0087] ρ g Density of entrained refrigeration oil, unit: kg / m³ 3 ;

[0088] ρ l This refers to the density of the intake gas, in kg / m³. 3 ;

[0089] d is the bottom diameter of the funnel-shaped filter element, in mm;

[0090] h represents the height of the funnel-shaped filter element, in mm;

[0091] l represents the height of the inclined side of the funnel-shaped filter element, in mm.

[0092] This formula range is derived from the separation efficiency measured when oil droplets pass through the filter screen at different flow rates. Generally, a lower flow rate results in better separation. Based on a comprehensive evaluation of separation efficiency and manufacturing costs, an optimal flow rate range is given.

[0093] The oil-gas separation device of this embodiment can effectively separate large droplets, small droplets, and dispersed micro-droplets entering the oil by setting up baffle channels, baffle plates, funnel-shaped filter elements, and other structures. This not only makes the oil-gas separation device compact but also greatly improves the separation effect.

[0094] According to an embodiment of the present invention (not shown in the figures), a compressor is provided, which includes the oil-gas separation device of the above embodiment.

[0095] The compressor has a high-efficiency oil-gas separation device as described in the above embodiment. The oil-gas separation device can improve the efficiency of separating refrigeration oil and avoid oil shortage in the compressor to ensure stable operation of the unit.

[0096] Meanwhile, the oil-gas separator can stably return oil, and many of its structures can improve separation efficiency and increase the unit's oil return efficiency.

[0097] Preferably, the compressor is a screw compressor.

[0098] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0099] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0100] Of course, the above are preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the basic principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An oil-gas separation device, characterized in that, The housing (10) has a separation chamber (11) formed inside it, and the air inlet (12) of the oil-gas separator is connected to the separation chamber (11); The inner cylinder (20) is disposed in the separation chamber (11). An air inlet channel (13) is formed between the outer wall of the inner cylinder (20) and the inner wall of the separation chamber (11). An air inlet (12) is disposed at the position of the air inlet channel (13). The inner cylinder (20) is fixedly connected to the shell (10). An air outlet channel (21) is formed between the internal space of the inner cylinder (20) and the shell (10). The air outlet channel (21) is connected to the air outlet (14) of the oil-gas separator. Multiple deflector protrusions (30) are staggered in the air intake channel (13), and all the deflector protrusions (30) divide the air intake channel (13) into deflector channels; The oil-gas separation device also includes multiple baffles (50) and gas equalization plates (60). The multiple baffles (50) are connected to the inner wall of the inner cylinder (20) and located in the gas outlet channel (21). The multiple baffles (50) are staggered. The gas equalization plates (60) are connected to the inner wall of the inner cylinder (20) and located in the gas outlet channel (21). The gas equalization plates (60) have multiple gas equalization holes (61). The gas equalization plates (60) are located between the baffles (50) and the gas outlet (14). The gas equalization plates (60) are conical. The diameter of the gas equalization plates (60) gradually increases from the first end to the second end. The first end of the gas equalization plates (60) faces the bottom of the separation chamber (11). The filter element (70) is fixedly connected in the air outlet channel (21), and the filter element (70) is located between the air distribution plate (60) and the air outlet (14). The filter element (70) is funnel-shaped. Support rib (80), the support rib (80) is fixedly connected to the inner wall of the inner cylinder (20), and the support rib (80) supports and fixes the filter element (70); The support rib (80) is funnel-shaped and matches the shape of the filter element (70). The ribs of the support rib (80) guide the oil droplets adsorbed by the filter element (70).

2. The oil-gas separation device according to claim 1, characterized in that, The plurality of the baffle protrusions (30) are respectively connected to the outer wall of the inner cylinder (20) and the inner wall of the separation chamber (11); The baffle boss (30) connected to the outer wall of the inner cylinder (20) and the baffle boss (30) connected to the inner wall of the separation chamber (11) are arranged alternately.

3. The oil-gas separation device according to claim 2, characterized in that, The first filter screen (41) is disposed inside the air intake channel (13) and is laid on the outer wall of the inner cylinder (20); The second filter (42) is disposed in the air intake channel (13) and is laid on the inner wall of the separation chamber (11).

4. The oil-gas separation device according to claim 2, characterized in that, The inner cylinder (20) is cylindrical, and the air inlet channel (13) is an annular channel. The airflow entering from the air inlet (12) flows spirally downward along the annular channel. All the aforementioned baffle protrusions (30) are staggered at circumferential intervals along the annular channel.

5. The oil-gas separation device according to claim 1, characterized in that, Also includes: The diameter of the filter element (70) gradually increases from the first end of the filter element (70) to the second end of the filter element (70). The diameter of the second end of the filter element (70) is the same as the inner wall diameter of the inner cylinder (20). The filter element (70) is used to filter all the airflow flowing out from the air outlet (14).

6. The oil-gas separation device according to claim 5, characterized in that, The structure of the filter element (70) satisfies the following formula: l=(h 2 +d 2 / 4) 0.5 Vmax=0.2[(ρ g -r l ) / p l ] 0.5 V=Q / [πl 2 (d / l)]*10 6 0.2≤V≤Vmax; in, Vmax is the maximum gas flow velocity through the filter element, in m / s; V represents the actual gas flow velocity through the filter element, in m / s. Q represents the air intake volume of the oil separator, in m³ / s. ρ g Density of entrained refrigeration oil, unit: kg / m³; ρ l The density of the intake gas is expressed in kg / m³. d is the bottom diameter of the funnel-shaped filter element, in mm; h represents the height of the funnel-shaped filter element, in mm. l represents the height of the inclined side of the funnel-shaped filter element, in mm.

7. A compressor, characterized in that, The oil-gas separation device includes any one of claims 1 to 6.

8. The compressor according to claim 7, characterized in that, The compressor is a screw compressor.

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