Oil separator

Abstract

The utility model provides an oil separator which comprises a barrel, an air inlet pipe, an air outlet pipe and an oil filter. The air inlet pipe is connected to the cylinder; the air outlet pipe is connected to the cylinder, one end of the air outlet pipe extends into the cylinder, and the other end of the air outlet pipe extends out of the cylinder. The oil filter is arranged at the end, located in the cylinder, of the gas outlet pipe and used for preventing oil from entering the gas outlet pipe and allowing gas to circulate. Through the structural design, according to the oil separator, oil liquid in gas is filtered out through the oil filter, the oil liquid in the gas is prevented from entering the gas outlet pipe, the separation effect of the oil separator can be optimized, and then the working efficiency of related equipment such as a condenser can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of refrigeration system related equipment, and in particular to an oil separator. BACKGROUND

[0002] In the prior art, the oil separator includes a cylinder and a gas outlet pipe connected to the cylinder. The gas outlet pipe is used for discharging the gas in the cylinder. In the prior art, the relative gas in the cylinder is discharged out of the cylinder through the gas outlet pipe to complete the oil-gas separation. However, the fluid entering the gas outlet pipe often contains oil droplets, which results in poor separation effect. CONTENT OF THE INVENTION

[0003] One of the main purposes of the present disclosure is to overcome at least one of the defects of the prior art, and to provide an oil separator capable of avoiding oil entering the gas outlet pipe.

[0004] To achieve the above-mentioned purpose, the present disclosure adopts the following technical solutions:

[0005] According to one aspect of the present disclosure, an oil separator is provided, which includes a cylinder, a gas inlet pipe, a gas outlet pipe, and an oil filter. The gas inlet pipe is connected to the cylinder. The gas outlet pipe is connected to the cylinder, one end of the gas outlet pipe extends into the cylinder, and the other end extends out of the cylinder. The oil filter is arranged at the end of the gas outlet pipe located in the cylinder, and the oil filter is used to prevent oil from entering the gas outlet pipe and to allow gas to flow through.

[0006] According to one of the embodiments of the present disclosure, the oil filter includes a filter screen. The filter screen is in a cylindrical structure, one end of the filter screen is open, and the other end is closed. The filter screen is connected to the end of the gas outlet pipe located in the cylinder through the open end.

[0007] According to one of the embodiments of the present disclosure, the filter screen includes a first part and a second part connected in an axial direction. One end of the first part is connected to the gas outlet pipe, and the second part is connected to the other end of the first part.

[0008] According to one of the embodiments of the present disclosure, the second part is in a closed duckbill structure, an arc structure, an inverted triangular structure, or an inverted trapezoidal structure.

[0009] According to one of the embodiments of the present disclosure, the oil filter further includes a connecting sleeve. The connecting sleeve is in a cylindrical structure, one end of the connecting sleeve is connected to the end of the gas outlet pipe located in the cylinder, and the other end is connected to the filter screen.

[0010] According to one of the embodiments of the present disclosure, the connecting sleeve comprises a third part and a fourth part connected in an axial direction, one end of the fourth part is connected to one end of the third part, the other end of the fourth part is connected to the filter screen, the connecting sleeve is sleeved on the outer periphery of the end of the air outlet pipe located in the cylinder through the third part; wherein the inner diameter of the third part is larger than the inner diameter of the fourth part, and the inner diameter of the fourth part is smaller than the outer diameter of the air outlet pipe.

[0011] According to one of the embodiments of the present disclosure, the connecting sleeve is a part of a pipe which is formed by flaring, the part of the pipe which is flared forms the third part, and the part of the pipe which is not flared forms the fourth part, or the connecting sleeve is a part of a pipe which is formed by necking, the part of the pipe which is necked forms the fourth part, and the part of the pipe which is not necked forms the third part; wherein the outer diameter of the third part is larger than the outer diameter of the fourth part.

[0012] According to one of the embodiments of the present disclosure, the filter screen comprises a first part and a second part connected in an axial direction, one end of the first part is connected to the air outlet pipe, the second part is connected to the other end of the first part, and the second part is a closed structure; wherein the second part and the connecting sleeve are arranged in an axial direction.

[0013] According to one of the embodiments of the present disclosure, the open end of the filter screen is sleeved on the outer periphery of the connecting sleeve; the oil filter further comprises a fixing ring; the fixing ring is a ring structure, the fixing ring is sleeved on the outer periphery of the open end of the filter screen, and is used for fixing the filter screen to the connecting sleeve.

[0014] According to one of the embodiments of the present disclosure, the filter screen, the connecting sleeve and the fixing ring are fixedly connected through a welding process.

[0015] According to one of the embodiments of the present disclosure, the oil separator further comprises a one-way valve; the one-way valve is arranged on the air outlet pipe and located in the cylinder.

[0016] According to the above technical solution, the oil separator provided by the present disclosure has the following advantages and positive effects:

[0017] The oil separator provided by the present disclosure comprises a cylinder, an air outlet pipe and an oil filter; the air outlet pipe is connected to the cylinder, one end of the air outlet pipe extends into the cylinder, and the other end of the air outlet pipe extends out of the cylinder; the oil filter is arranged on the end of the air outlet pipe located in the cylinder, and the oil filter is used for preventing oil from entering the air outlet pipe and allowing gas to flow. Through the above structural design, the oil separator provided by the present disclosure filters out the oil in the gas through the oil filter, prevents the oil in the gas from entering the air outlet pipe, optimizes the separation effect of the oil separator, and thus is beneficial to improving the working efficiency of related equipment such as a condenser. BRIEF DESCRIPTION OF DRAWINGS

[0018] The various objects, features and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments of the present disclosure, when considered in conjunction with the accompanying drawings. The drawings are not necessarily to scale, and in some instances, various components of the present disclosure can be shown exaggerated in scale or in somewhat schematic form and again, the drawings are merely exemplary illustrations of the present disclosure and should not be construed as limiting. In the drawings:

[0019] Figure 1 is a perspective view of an oil separator according to an exemplary embodiment;

[0020] Figure 2 is Figure 1 is a cross-sectional view of the oil separator taken along the axial direction;

[0021] Figure 3 is Figure 2 is a perspective view of a combined structure of an air outlet pipe and an oil filter according to an exemplary embodiment;

[0022] Figure 4 is Figure 3 is a cross-sectional view of the combined structure taken along the axial direction;

[0023] Figure 5 is Figure 4 is an enlarged view of portion A in FIG. 5;

[0024] Figure 6 and Figure 7 are respectively Figure 3 are perspective views of an oil filter according to an exemplary embodiment, taken from two different angles;

[0025] Figure 8 is Figure 6 is an exploded perspective view of an oil filter according to an exemplary embodiment;

[0026] Figure 9 is a cross-sectional view of an oil separator according to another exemplary embodiment.

[0027] The reference numerals are explained as follows:

[0028] 100. cylinder;

[0029] 200. air inlet pipe;

[0030] 400. air outlet pipe;

[0031] 500. oil filter;

[0032] 510. filter screen;

[0033] 511. first portion;

[0034] 512. second portion;

[0035] 520. connecting sleeve;

[0036] 521. third portion;

[0037] 522. fourth portion;

[0038] 530. fixing ring;

[0039] 531. weld mark;

[0040] 600. one-way valve. DETAILED DESCRIPTION

[0041] Embodiments embodying the features and advantages of the present disclosure will be described in detail hereinafter. It should be understood that the present disclosure can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the disclosure to those skilled in the art.

[0042] In the following description of various example embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example structures, systems, and steps in which aspects of the present disclosure can be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps can be utilized and that structural and functional modifications can be made without departing from the scope of the present disclosure. Also, while the terms "over," "between," "inside," "on," and the like can be used in the following description to describe relative positioning of various example features and elements, these terms are used in this specification to merely facilitate description of the examples, and do not limit the scope of the present disclosure. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of structures in order to fall within the scope of the present disclosure.

[0043] Referring to Figure 1 , a perspective view schematically illustrates an oil separator according to the present disclosure. In this example embodiment, the oil separator according to the present disclosure is described by way of example as applied to a refrigeration system. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes can be made to the following detailed description of the present disclosure in order to apply the relevant design of the present disclosure to other types of applications, and such changes are still within the scope of the oil separator according to the present disclosure.

[0044] As shown in Figure 1 , in an embodiment of the present disclosure, the oil separator according to the present disclosure includes a cylinder 100, an inlet pipe 200, an outlet pipe 400, and an oil filter 500 (not shown). For a better understanding, refer to Figure 1 , Figures 2 to 8 , Figure 2 , which schematically illustrates an axial cross-sectional view of the oil separator; Figure 3Fig. 4 is a perspective view schematically showing a combination structure of the gas outlet pipe 400 and the oil filter 500; Figure 4 Fig. 5 is a perspective view schematically showing the oil filter 500; Figure 3 Fig. 6 is an axial cross-sectional view schematically showing the combination structure; Figure 5 Fig. 7 is a perspective view schematically showing the oil filter 500; Figure 4 Fig. 8 is an enlarged view schematically showing the A portion in Fig. 7; Figure 6 Fig. 9 is a perspective view schematically showing the oil filter 500; Figure 7 Fig. 10 is a perspective view schematically showing the oil filter 500; Figure 8 Fig. 11 is an exploded perspective view schematically showing the oil filter 500. The structure, connection mode and functional relationship of each main component of the oil separator according to the present disclosure will be described in detail below in combination with the above-mentioned figures.

[0045] As shown in Fig. 1, in an embodiment of the present disclosure, the gas inlet pipe 200 is connected to the cylinder 100. The gas outlet pipe 400 is connected to the cylinder 100, one end of the gas outlet pipe 400 extends into the cylinder 100, and the other end of the gas outlet pipe 400 extends out of the cylinder 100. The oil filter 500 is arranged at the end of the gas outlet pipe 400 located in the cylinder 100, and the oil filter 500 is used to prevent oil from entering the gas outlet pipe 400 and to allow gas to flow. Through the above-mentioned structural design, the oil separator according to the present disclosure can filter out oil in gas by the oil filter 500, prevent oil in gas from entering the gas outlet pipe 400, and optimize the separation effect of the oil separator, thereby facilitating the improvement of the working efficiency of related equipment such as a condenser. Figures 1 to 3 As shown in Fig. 2, in an embodiment of the present disclosure, the oil filter 500 can include a filter screen 510. The filter screen 510 is a cylindrical structure, one end of the filter screen 510 is open and the other end is closed, and the filter screen 510 is connected to the end of the gas outlet pipe 400 located in the cylinder 100 via the open end. Through the above-mentioned structural design, the present disclosure can filter out oil in gas by the filter screen 510, and the structure is simple and easy to implement.

[0046] Figures 3 to 8 As shown in Fig. 3, based on the structural design that the oil filter 500 includes the filter screen 510, in an embodiment of the present disclosure, the filter screen 510 can include a first part 511 and a second part 512 connected in the axial direction. One end of the first part 511 is connected to the gas outlet pipe 400, for example, the one end of the first part 511 can be connected to the connecting sleeve 520 described below and connected to the gas outlet pipe 400 via the connecting sleeve 520, and for another example, the one end of the first part 511 can be directly connected to the gas outlet pipe 400. The second part 512 is connected to the other end of the first part 511. Through the above-mentioned structural design, the present disclosure can realize the assembly connection of the filter screen 510 by the first part 511.

[0047] As shown in Fig. 4, based on the structural design that the oil filter 500 includes the filter screen 510, in an embodiment of the present disclosure, the filter screen 510 can include a first part 511 and a second part 512 connected in the axial direction. One end of the first part 511 is connected to the gas outlet pipe 400, for example, the one end of the first part 511 can be connected to the connecting sleeve 520 described below and connected to the gas outlet pipe 400 via the connecting sleeve 520, and for another example, the one end of the first part 511 can be directly connected to the gas outlet pipe 400. The second part 512 is connected to the other end of the first part 511. Through the above-mentioned structural design, the present disclosure can realize the assembly connection of the filter screen 510 by the first part 511. Figures 6 to 8 As shown in Fig. 5, based on the structural design that the oil filter 500 includes the filter screen 510, in an embodiment of the present disclosure, the filter screen 510 can include a first part 511 and a second part 512 connected in the axial direction. One end of the first part 511 is connected to the gas outlet pipe 400, for example, the one end of the first part 511 can be connected to the connecting sleeve 520 described below and connected to the gas outlet pipe 400 via the connecting sleeve 520, and for another example, the one end of the first part 511 can be directly connected to the gas outlet pipe 400. The second part 512 is connected to the other end of the first part 511. Through the above-mentioned structural design, the present disclosure can realize the assembly connection of the filter screen 510 by the first part 511.​

[0048] As shown in Figures 6 to 8 the second part 512 can be a closed duckbill-shaped structure. Through the above structural design, the duckbill-shaped structure or the arc-shaped structure of the second part 512 can be used to make the oil liquid attached to the filter screen 510 more easily gather and fall into the cylinder body 100. In some other embodiments of the present disclosure, the filter screen 510 can also adopt other structural forms, for example, the second part 512 can also be an arc-shaped structure, an inverted triangular structure, or an inverted trapezoidal structure, and so on, and the second part 512 can also be a cylindrical structure, and the end opening of the second part 512 away from the first part 511 can be a closed planar structure, and the above embodiments are not limited.

[0049] As shown in Figures 3 to 8 based on the structural design of the filter screen 510, in an embodiment of the present disclosure, the oil filter 500 proposed by the present disclosure can further include a connecting sleeve 520. The connecting sleeve 520 is a cylindrical structure, one end of the connecting sleeve 520 is connected to the end of the air outlet pipe 400 located in the cylinder body 100, and the other end of the connecting sleeve 520 is connected to the filter screen 510. Through the above structural design, the connecting sleeve 520 can be used to connect the filter screen 510 and the air outlet, which is conducive to reducing the assembly difficulty of the filter screen 510 and improving the connection reliability and structural stability of the oil filter 500.

[0050] As shown in Figure 5 and Figure 8 based on the structural design of the connecting sleeve 520, in an embodiment of the present disclosure, the connecting sleeve 520 can include a third part 521 and a fourth part 522 connected in the axial direction. One end of the fourth part 522 is connected to one end of the third part 521, and the other end of the fourth part 522 is connected to the filter screen 510. The connecting sleeve 520 is sleeved on the outer periphery of the end of the air outlet pipe 400 located in the cylinder body 100 through the third part 521. On this basis, the inner diameter of the third part 521 can be greater than the inner diameter of the fourth part 522, and the inner diameter of the fourth part 522 can be less than the outer diameter of the air outlet pipe 400. Through the above structural design, the connecting sleeve 520 adopts a variable-diameter structure design, so that the inner wall of the connecting sleeve 520 forms a limiting surface at the connection between the third part 521 and the fourth part 522. The limiting surface can be an inclined surface, an arc surface, or a stepped surface, and so on. Accordingly, the present disclosure can be matched with the air outlet pipe 400, improve the connection reliability of the connecting sleeve 520 and the air outlet pipe 400, and avoid the air outlet pipe 400 from excessively extending into the connecting sleeve 520 (even extending into the second part 512 of the filter screen 510).

[0051] Based on the structure design that the connecting sleeve 520 adopts variable diameter, in an embodiment of the present disclosure, the connecting sleeve 520 can be a part of the pipe via flaring forming, according to which, the part of the pipe that is flared forms the third part 521 described above, and the part of the pipe that is not flared forms the fourth part 522 described above. Alternatively, the connecting sleeve 520 can also be a part of the pipe via necking forming, according to which, the part of the pipe that is necked forms the fourth part 522 described above, and the part of the pipe that is not necked forms the third part 521 described above. On this basis, the outer diameter of the third part 521 of the connecting sleeve 520 can be greater than the outer diameter of the fourth part 522.

[0052] As shown in Figure 4 and Figure 5 , based on the structure design that the oil filter 500 includes the connecting sleeve 520, in an embodiment of the present disclosure, the filter screen 510 includes a first part 511 and a second part 512 connected in the axial direction, one end of the first part 511 is connected to the gas outlet pipe 400 via a cylindrical port, the second part 512 is connected to the other end of the first part 511 via a cylindrical port, and the second part 512 is a closed structure. On this basis, the second part 512 and the connecting sleeve 520 can be arranged in the axial direction. In other words, the end of the connecting sleeve 520 away from the gas outlet pipe 400 does not extend into the second part 512 of the filter screen 510, and the connecting sleeve 520 does not occupy the entire first part 511 of the filter screen 510 in the axial direction. Through the above structure design, the present disclosure can reduce the shielding of the filter screen 510 by the connecting sleeve 520, and further optimize the filtering effect on the oil.

[0053] As shown in Figures 3 to 8 , based on the structure design that the oil filter 500 includes the connecting sleeve 520, in an embodiment of the present disclosure, the open end of the filter screen 510 is sleeved on the outer periphery of the connecting sleeve 520. In addition, the oil filter 500 proposed by the present disclosure can also include a fixing ring 530. The fixing ring 530 is a ring structure, the fixing ring 530 is sleeved on the outer periphery of the open end of the filter screen 510, and is used to fix the filter screen 510 to the connecting sleeve 520. Through the above structure design, the present disclosure can realize the connection of the filter screen 510 and the connecting sleeve 520 by using the fixing ring 530, and realize the connection of the whole oil filter 500 and the gas outlet pipe 400, which is reliable, convenient to operate, and is conducive to reducing the assembly difficulty.

[0054] Based on the structure design that the oil filter 500 includes the fixing ring 530, in an embodiment of the present disclosure, the filter screen 510, the connecting sleeve 520 and the fixing ring 530 can be fixed and connected via a welding process. For example, the welding process of the filter screen 510, the connecting sleeve 520 and the fixing ring 530 can be, for example but not limited to, a spot welding process, which can be referred to in Figure 6 and Figure 7The welding marks 531 are shown in FIG. 5. It should be understood that the filter screen 510, the connecting sleeve 520, and the fixing ring 530 are free of the welding marks 531 before they are assembled, i.e., before the welding process is performed. However, when the assembled oil filter 500 or the oil separator complete product is disassembled, the welding marks 531 can be observed on at least one of the filter screen 510, the connecting sleeve 520, and the fixing ring 530.

[0055] Referring to Figure 9 , Figure 9 FIG. 5 shows a schematic axial cross-sectional view of an oil separator embodying principles of the present disclosure in another exemplary embodiment.

[0056] As Figure 9 shown in FIG. 5, in an embodiment of the present disclosure, the oil separator proposed by the present disclosure can further include a one-way valve 600. The one-way valve 600 is arranged in the gas outlet pipe 400 and located inside the cylinder 100. Through the above structural design, the present disclosure utilizes the one-way valve 600 to achieve the reverse check function on the gas outlet path of the oil separator, avoids the gas and other media of the external pipeline from flowing into the cylinder 100 through the gas outlet pipe 400, avoids the reverse flow phenomenon, and improves the stability and reliability of the oil separator. Furthermore, the present disclosure arranges the one-way valve 600 inside the cylinder 100, without the need for the gas outlet pipe 400 of the oil separator to be connected with other one-way valves 600 outside the cylinder 100, reduces the number of external connection points of the oil separator, and simultaneously does not need to reserve a longer length for the part of the gas outlet pipe 400 that extends out of the cylinder 100, which is beneficial to save the pipeline and reduce the cost.

[0057] It should be noted that the oil separators shown in the drawings and described in the present specification are only a few examples of many kinds of oil separators that can employ principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details of the oil separators shown in the drawings or described in the present specification or any components of the oil separators.

[0058] In summary, the oil separator proposed by the present disclosure includes the cylinder 100, the gas outlet pipe 400, and the oil filter 500; the gas outlet pipe 400 is connected to the cylinder 100, one end of the gas outlet pipe 400 extends into the cylinder 100, and the other end extends out of the cylinder 100; the oil filter 500 is arranged at the end of the gas outlet pipe 400 located inside the cylinder 100, the oil filter 500 is used to prevent oil from entering the gas outlet pipe 400 and to allow gas to flow through. Through the above structural design, the oil separator proposed by the present disclosure filters out the oil in the gas through the oil filter 500, prevents the oil in the gas from entering the gas outlet pipe 400, can optimize the separation effect of the oil separator, and is further beneficial to improve the working efficiency of related equipment such as a condenser.

[0059] The exemplary embodiments of the oil separator presented by the present disclosure are described and / or illustrated above. However, the embodiments of the present disclosure are not limited to the specific embodiments described above, but include each and every implementation of the present disclosure. No component or step of the embodiments is to be construed as being required unless otherwise explicitly stated. Each and every component and / or step of the embodiments can be used independently or in any combination by those skilled in the art. Each and every component and / or step of one embodiment can be used in combination with other components and / or steps of other embodiments. The use of the terms "one," "a," and "the" and / or singular forms of words in this document are not intended to exclude the plural forms of such terms and / or words unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and / or "having" are intended to be open-ended terms that specifically permit the inclusion of additional elements and / or steps. The terms "first," "second," and / or "third" and / or the like in the description and / or in the claims are used for purposes of differentiation between similar objects / elements and do not limit one / each object / element to a particular number.

[0060] Although the oil separator presented by the present disclosure has been described in terms of different specific embodiments, those skilled in the art will recognize that modifications can be made to the embodiments of the present disclosure without departing from the spirit and scope of the claims.

Claims

1. An oil separator characterized by, The utility model relates to a filter device for air compressor, comprising: a cylinder (100); an air inlet pipe (200) connected to the cylinder (100); an air outlet pipe (400) connected to the cylinder (100), one end of the air outlet pipe (400) extends into the cylinder (100), and the other end extends out of the cylinder (100); an oil filter (500) arranged at the end of the air outlet pipe (400) located in the cylinder (100), the oil filter (500) is used for preventing oil from entering the air outlet pipe (400) and allowing gas to flow.

2. The oil separator of claim 1, wherein The oil filter (500) comprises: a filter screen (510) in a cylindrical structure, one end of the filter screen (510) is open, and the other end is closed, the filter screen (510) is connected to the end of the air outlet pipe (400) located in the cylinder (100) through the open end.

3. The oil separator of claim 2, wherein The filter screen (510) comprises a first part (511) and a second part (512) connected in an axial direction, one end of the first part (511) is connected to the air outlet pipe (400), and the second part (512) is connected to the other end of the first part (511).

4. The oil separator of claim 3, wherein The second part (512) is in a closed duckbill structure, an arc structure, an inverted triangular structure or an inverted trapezoidal structure.

5. The oil separator of claim 2, wherein The oil filter (500) further comprises: a connecting sleeve (520) in a cylindrical structure, one end of the connecting sleeve (520) is connected to the end of the air outlet pipe (400) located in the cylinder (100), and the other end is connected to the filter screen (510).

6. The oil separator of claim 5, wherein The connecting sleeve (520) comprises a third part (521) and a fourth part (522) connected in an axial direction, one end of the fourth part (522) is connected to one end of the third part (521), the other end of the fourth part (522) is connected to the filter screen (510), and the connecting sleeve (520) is sleeved on the outer periphery of the end of the air outlet pipe (400) located in the cylinder (100) through the third part (521); wherein the inner diameter of the third part (521) is greater than the inner diameter of the fourth part (522), and the inner diameter of the fourth part (522) is smaller than the outer diameter of the air outlet pipe (400).

7. The oil separator of claim 6, wherein The connecting sleeve (520) is formed by flaring a part of a pipe, the flared part of the pipe forms the third part (521), and the unflared part forms the fourth part (522), or the connecting sleeve (520) is formed by necking a part of a pipe, the necked part of the pipe forms the fourth part (522), and the unnecked part forms the third part (521); wherein the outer diameter of the third part (521) is greater than the outer diameter of the fourth part (522).

8. The oil separator of claim 5, wherein The filter screen (510) comprises a first part (511) and a second part (512) connected in an axial direction, one end of the first part (511) is connected to the air outlet pipe (400) through a cylindrical opening, the second part (512) is connected to the other end of the first part (511) through a cylindrical opening, and the second part (512) is a closed structure; wherein the second part (512) and the connecting sleeve (520) are arranged in an axial direction with a spacing.

9. The oil separator of claim 5, wherein, One end of the filter screen (510) is sleeved on the outer periphery of the connecting sleeve (520); the oil filter (500) further comprises: A fixing ring (530) in a ring structure, the fixing ring (530) is sleeved on the outer periphery of the open end of the filter screen (510), and is used for fixing the filter screen (510) to the connecting sleeve (520).

10. The oil separator of claim 9, wherein The filter screen (510), the connecting sleeve (520) and the fixing ring (530) are fixedly connected through a welding process.

11. The oil separator according to any one of claims 1 to 10, characterized in that The oil separator further comprises: A one-way valve (600) arranged in the air outlet pipe (400) and located in the cylindrical body (100).

Images