Oil separator and method of manufacturing an oil separator

Abstract

The oil separator comprises a cylinder, an air inlet pipe, an oil return pipe and a one-way valve. The cylinder is provided with a first cylinder opening at the top and a second cylinder opening at the bottom. The air inlet pipe is connected to the side of the cylinder. The oil return pipe is connected to the second cylinder opening. The one-way valve allows flow in the direction out of the cylinder. The one-way valve comprises a valve pipe, a valve seat and a valve core. The valve pipe has a valve cavity. The valve pipe comprises a first part and a second part connected in the axial direction. The first part is located in the cylinder. One end of the second part is connected to the first part. The other end of the second part extends out of the cylinder through the first cylinder opening. The second part is fixedly connected to the cylinder at the first cylinder opening. The valve seat is arranged at the end of the first part away from the second part. The valve seat is provided with a valve hole penetrating in the axial direction. The valve hole is in communication with the valve cavity. The valve core is movably arranged in the first part to block or communicate the valve hole and the valve cavity.

Description

Technical Field

[0001] This disclosure relates to the technical field of refrigeration system-related equipment, and in particular to an oil separator and a method for manufacturing the oil separator. Background Technology

[0002] In existing oil separator designs, the oil separator includes a cylinder and an outlet pipe connected to the cylinder, which allows gas to be discharged from the cylinder. The outlet pipe in existing oil separators has a continuous structure, and it extends from the cylinder before being welded to a check valve and other system piping. This results in too many external welding points for the oil separator. Furthermore, a considerable length needs to be reserved for the check valve on the portion of the outlet pipe extending beyond the cylinder, leading to wasted piping and high costs. Summary of the Invention

[0003] A primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above, and to provide an oil separator with fewer external connection points and that saves on piping.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0005] According to one aspect of this disclosure, an oil separator is provided, comprising a cylinder, an air inlet pipe, an oil return pipe, and a one-way valve; the cylinder has a first inlet at its top and a second inlet at its bottom; the air inlet pipe is connected to the side of the cylinder; the oil return pipe is connected to the second inlet; the one-way valve allows flow in the direction of exiting the cylinder, and the one-way valve includes a valve tube, a valve seat, and a valve core; the valve tube has a valve cavity, and the valve tube includes a first part and a second part connected axially, the first part being located inside the cylinder, one end of the second part being connected to the first part, and the other end extending out of the cylinder from the first inlet, the second part being fixedly connected to the cylinder at the first inlet; the valve seat is disposed at the end of the first part away from the second part, and has an axially penetrating valve hole, the valve hole communicating with the valve cavity; the valve core is movably disposed within the first part to isolate or connect the valve hole and the valve cavity.

[0006] According to one embodiment of this disclosure, the valve seat includes an assembly portion having a stepped structure having a stepped surface perpendicular to the axial direction, the stepped surface being annular, and the end of the first portion away from the second portion being connected to the stepped surface.

[0007] According to one embodiment of this disclosure, the valve seat and the valve tube are connected by a welding process.

[0008] According to one embodiment of this disclosure, the valve seat is made of carbon steel or stainless steel; and / or the valve tube is made of carbon steel or stainless steel.

[0009] According to one embodiment of this disclosure, the valve tube is made of stainless steel; the end of the second part extending out of the cylinder is connected to an air outlet connector.

[0010] According to one embodiment of this disclosure, the one-way valve is a gravity type, and the valve core is movably disposed in the valve cavity; wherein, when the medium in the valve tube flows in the direction of flowing out of the cylinder, the valve core and the valve seat are arranged at intervals so that the medium entering the valve cavity through the valve hole flows through the flow channel between the valve core and the valve tube; when the valve core and the valve hole are sealed together, the medium cannot flow between the valve tube and the cylinder.

[0011] According to one embodiment of this disclosure, the valve core includes a body and at least two tail fins; the tail fins are connected to the periphery of the body and extend axially away from the valve seat, and at least two tail fins are arranged circumferentially spaced along the body; the one-way valve further includes a limiting structure; the limiting structure includes two limiting arms and a connecting arm; the limiting arms are fixed in the valve cavity of the first part and extend axially, one end of the limiting arm is connected to the valve seat, and a portion of the limiting arm is located in the area between two adjacent tail fins to restrict the circumferential rotation of the valve core; the connecting arm is connected between the ends of the two limiting arms away from the valve seat, the connecting arm is located on the side of the valve core away from the valve seat, and the connecting arm is used to restrict the axial movement of the valve core away from the valve seat.

[0012] According to one embodiment of this disclosure, the valve seat has an assembly hole on its end face facing the valve core, and one end of the limiting arm is inserted into the assembly hole.

[0013] According to one embodiment of this disclosure, the inner diameter of the first part is larger than the inner diameter of the second part, and a transition surface is formed on the inner wall of the valve tube at the connection between the first part and the second part; wherein, the other end of the limiting arm abuts against the transition surface.

[0014] According to one embodiment of this disclosure, the one-way valve is a diaphragm type.

[0015] According to one embodiment of this disclosure, along the axial direction, the valve seat is closer to the second cylinder opening than the connection between the air inlet pipe and the cylinder body.

[0016] According to one embodiment of the present disclosure, the cylinder includes a first sub-cylinder and a second sub-cylinder; the opening at one end of the first sub-cylinder is the first opening, and the opening at the other end is an open structure; the opening at one end of the second sub-cylinder is the second opening, and the opening at the other end is an open structure, and the second sub-cylinder is connected to the opening of the open structure of the first sub-cylinder with the opening of the open structure.

[0017] According to one embodiment of the present disclosure, the oil separator further includes a filter; the filter is disposed at the second cylinder inlet for filtering oil flowing through the second cylinder inlet to the return oil pipe.

[0018] According to one embodiment of this disclosure, the inner diameter of the first part is larger than the inner diameter of the second part, and the outer diameter of the first part is larger than the outer diameter of the second part.

[0019] As can be seen from the above technical solution, the advantages and positive effects of the oil separator proposed in this disclosure are as follows:

[0020] The oil separator disclosed herein includes a cylinder and a one-way valve. The one-way valve allows flow in the direction of outflow from the cylinder. The one-way valve includes a valve tube, a valve seat, and a valve core. The valve tube includes a first part and a second part connected axially. The first part is located inside the cylinder, one end of the second part is connected to the first part, and the other end extends out of the cylinder from the first opening. The second part is fixedly connected to the cylinder at the first opening. The valve seat is located at the end of the first part away from the second part and has an axially penetrating valve hole. The valve core is movably disposed within the first part to isolate or connect the valve hole and the valve chamber. Through the above design, this disclosure utilizes a one-way valve to achieve a check valve function in the exhaust passage of the oil separator, preventing backflow. Based on this, the present disclosure arranges the first part and a second part of the valve pipe inside the cylinder, and extends the other part of the second part out of the cylinder. That is, the valve pipe is used as the vent pipe of the oil separator. There is no need for the vent pipe of the oil separator to be connected to other one-way valves outside the cylinder, which reduces the number of external connection points of the oil separator. At the same time, there is no need to reserve a longer length for the part of the vent pipe that does not extend out of the cylinder, which helps to save pipeline and reduce costs.

[0021] Another primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above and to provide a method for manufacturing an oil separator.

[0022] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0023] According to another aspect of this disclosure, a method for manufacturing an oil separator is provided, wherein the method is used to manufacture the oil separator proposed in this disclosure and described in the above embodiments; the method for manufacturing the oil separator includes: preparing the air inlet pipe, the oil return pipe, and the one-way valve; preparing the cylinder body, reducing the opening at one end of the cylinder body to form a second opening, and keeping the other end of the cylinder body open; connecting the air inlet pipe to the side of the cylinder body, and connecting the oil return pipe to the second opening; inserting the end of the first part of the one-way valve away from the second part into the cylinder body through the open structure at the other end of the cylinder body, then reducing the opening at the other end of the cylinder body to form the first opening, and fixing the cylinder body and the second part at the first opening to obtain the oil separator.

[0024] According to one embodiment of this disclosure, the inner diameter of the first part is larger than the inner diameter of the second part; wherein, the step of preparing the one-way valve includes: first preparing a pipe fitting, then flaring a portion of the pipe fitting to form the first part, and forming the second part from the other part of the pipe fitting, thereby forming the valve tube, then inserting the valve core into the valve cavity of the first part, and connecting the valve seat to the valve tube; or, first preparing a pipe fitting, then reducing a portion of the pipe fitting to form the second part, and forming the first part from the other part of the pipe fitting, thereby forming the valve tube, then inserting the valve core into the valve cavity of the first part, and connecting the valve seat to the valve tube.

[0025] According to one embodiment of this disclosure, the method for manufacturing the oil separator further includes: sealing the outlet side of each of the air inlet pipe, the oil return pipe, and the valve pipe extending from the cylinder; performing a phosphate treatment on the surface of the oil separator; and performing a spray coating operation on the surface of the oil separator.

[0026] Another major objective of this disclosure is to overcome at least one of the defects of the prior art described above and to provide a method for manufacturing an oil separator.

[0027] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0028] According to another aspect of this disclosure, a method for manufacturing an oil separator is provided, wherein the method is used to manufacture the oil separator proposed in this disclosure and described in the above embodiments; the method for manufacturing the oil separator includes: preparing the air inlet pipe, the oil return pipe, and the one-way valve; preparing a first sub-cylinder and a second sub-cylinder, wherein one end of the first sub-cylinder is narrowed to form the first opening, and one end of the second sub-cylinder is narrowed to form the second opening, keeping the other ends of the first sub-cylinder and the second sub-cylinder open; connecting the air inlet pipe to the side of the first sub-cylinder, inserting the end of the second part of the one-way valve away from the first part into the cylinder through the open structure at the other end of the first sub-cylinder and extending it out of the first opening, and then fixing the first sub-cylinder and the second part together at the first opening; connecting the oil return pipe to the second opening; and connecting the open structure at the other end of the first sub-cylinder and the open structure at the other end of the second sub-cylinder to obtain the oil separator.

[0029] As can be seen from the above technical solution, the advantages and positive effects of the oil separator and its manufacturing method proposed in this disclosure are as follows:

[0030] The method for manufacturing the oil separator disclosed herein enables the processing and manufacturing of the oil separator disclosed herein. Accordingly, while realizing the check function of the oil separator in the exhaust passage, this disclosure can reduce the number of external connection points of the oil separator, and at the same time eliminates the need to reserve a long length for the part of the exhaust pipe extending out of the cylinder. Attached Figure Description

[0031] The various objectives, features, and advantages of this disclosure will become more apparent from the following detailed description of preferred embodiments of the disclosure taken in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0032] Figure 1 This is a schematic diagram of an oil separator according to an exemplary embodiment;

[0033] Figure 2 yes Figure 1 The image shows a shaft side sectional view of the oil separator;

[0034] Figure 3 yes Figure 2 An enlarged schematic diagram of a one-way valve is shown;

[0035] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the diagram;

[0036] Figure 5 yes Figure 4 A three-dimensional schematic diagram of part of the structure is shown;

[0037] Figure 6 yes Figure 5 A three-dimensional schematic diagram of the valve core is shown;

[0038] Figure 7 and Figure 8 These are schematic diagrams of the limiting structure of an oil separator according to two other exemplary embodiments;

[0039] Figure 9 This is a flowchart illustrating a method for manufacturing an oil separator according to an exemplary embodiment;

[0040] Figures 10 to 12 They are Figure 9 The diagram shows a process diagram of some steps in the manufacturing method of the oil separator;

[0041] Figure 13 This is a flowchart illustrating a method for manufacturing an oil separator according to another exemplary embodiment;

[0042] Figures 14 to 18 They are Figure 13 The diagram shows a process diagram of some steps in the manufacturing method of the oil separator.

[0043] The annotations in the attached figures are explained as follows:

[0044] 100. Cylinder body; 412. Second part;

[0045] 101. First cylinder opening; 413. Transition surface;

[0046] 102. Second cylinder inlet; 420. Valve seat;

[0047] 110. First sub-cylinder; 4201. Valve orifice;

[0048] 120. Second sub-cylinder; 4202. Assembly hole;

[0049] 210. Intake pipe; 421. Stepped surface;

[0050] 220. Air inlet connector; 430. Valve core;

[0051] 310. Return oil pipe; 4301. Weight reduction hole;

[0052] 320. Return oil connector; 431. Body;

[0053] 330. Filter; 432. Tail fin;

[0054] 400. Check valve; 440. Air outlet connector;

[0055] 410. Valve tube; 450. Limiting structure;

[0056] 4101. Valve chamber; 451. Limit arm;

[0057] 411. Part One; 452. Connecting Arm;

[0058] 4521. Limiting convex part. Detailed Implementation

[0059] Typical embodiments embodying the features and advantages of this disclosure will be described in detail in the following description. It should be understood that this disclosure can have various variations in different embodiments without departing from the scope of this disclosure, and the descriptions and drawings therein are illustrative in nature and not intended to limit this disclosure.

[0060] In the following description of various exemplary embodiments of this disclosure, reference is made to the accompanying drawings, which form part of this disclosure, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this disclosure. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this disclosure. Furthermore, while the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of this disclosure, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this disclosure.

[0061] See Figure 1 The diagram illustrates a typical structural schematic of the oil separator proposed in this disclosure. In this exemplary embodiment, the oil separator proposed in this disclosure is described using an application in a refrigeration system as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to other types of application scenarios, and these changes shall still be within the scope of the principles of the oil separator proposed in this disclosure.

[0062] like Figure 1 As shown, in one embodiment of this disclosure, the oil separator includes a cylinder 100, an air inlet pipe 210, an oil return pipe 310, and a one-way valve 400. (See also...) Figures 2 to 6 , Figure 2 The image shows a representative axial sectional view of the oil separator; Figure 3 The diagram shows a typical enlarged schematic of the one-way valve 400; Figure 4 China representatively shows Figure 3 An enlarged schematic diagram of part A in the diagram; Figure 5 China representatively shows Figure 4 The diagram shows a partial three-dimensional representation of the structure, specifically illustrating the three-dimensional structure of the valve seat 420, valve core 430, and limiting structure 450. Figure 6 A three-dimensional schematic diagram of valve core 430 is shown in the figure. The structure, connection method, and functional relationship of the main components of the oil separator proposed in this disclosure will be described in detail below with reference to the above-mentioned figures.

[0063] like Figures 1 to 3 As shown, in one embodiment of this disclosure, a first inlet 101 is provided at the top of the cylinder 100, and a second inlet 102 is provided at the bottom of the cylinder 100. An air inlet pipe 210 is connected to the side of the cylinder 100. An oil return pipe 310 is connected to the second inlet 102 of the cylinder 100. A one-way valve 400 includes a valve pipe 410, a valve seat 420, and a valve core 430. The valve pipe 410 has a valve cavity 4101 and includes a first part 411 and a second part 412 connected axially. The first part 411 is located inside the cylinder 100, one end of the second part 412 is connected to the first part 411, and the other end of the second part 412 extends out of the cylinder 100 from the first inlet 101, and the second part 412 is fixedly connected to the cylinder 100 at the first inlet 101. A valve seat 420 is located at the end of the first part 411 away from the second part 412. The valve seat 420 has an axially penetrating valve hole 4201, which communicates with the valve cavity 4101. A valve core 430 is movably disposed within the first part 411 to isolate or connect the valve hole 4201 with the valve cavity 4101. The permissible flow direction of the one-way valve 400 is the direction of outflow from the cylinder 100. In other words, based on the check valve 400's check function, the medium inside the cylinder 100 can be discharged via the flow path of "cylinder 100 → valve hole 4201 → valve cavity 4101". When the medium or liquid from the external pipeline flows into the valve cavity 4101, the valve core 430 and the valve hole 4201 of the valve seat 420 seal together to achieve the check function. Through the above design, this disclosure utilizes the one-way valve 400 to achieve the check function of the oil separator in the exhaust passage, preventing backflow. Based on this, the present disclosure arranges the first part 411 and a part of the second part 412 of the valve pipe 410 inside the cylinder 100, and extends the other part of the second part 412 out of the cylinder 100. That is, the valve pipe 410 is used as the vent pipe of the oil separator, eliminating the need for the vent pipe of the oil separator to be connected to other one-way valves 400 outside the cylinder 100, reducing the number of external connection points of the oil separator. At the same time, the vent pipe does not need to be extended out of the cylinder 100 with a longer length, which helps to save pipeline and reduce costs.

[0064] like Figures 2 to 4As shown, in one embodiment of this disclosure, the inner diameter of the first part 411 can be larger than the inner diameter of the second part 412, and the outer diameter of the first part 411 can be larger than the outer diameter of the second part 412. Further, the first part 411 of the valve tube 410 can be formed by flaring a portion of the valve tube 410, with the unflared portion forming the second part 412. Alternatively, the second part 412 of the valve tube 410 can be formed by reducing the diameter of a portion of the valve tube 410, with the unreduced portion forming the first part 411. Both of these different processing methods can achieve an inner diameter of the first part 411 larger than the inner diameter of the second part 412, and an outer diameter of the first part 411 larger than the outer diameter of the second part 412.

[0065] like Figure 4 and Figure 5 As shown, in one embodiment of this disclosure, the valve seat 420 includes an assembly portion, which may be provided with a stepped structure. The stepped structure has a stepped surface 421 perpendicular to the axial direction. The stepped surface 421 is annular, and the end of the first portion 411 away from the second portion 412 is connected to the stepped surface 421. The stepped structure has a stepped surface 421 perpendicular to the axial direction, and the stepped surface 421 is annular. The end of the first portion 411 away from the second portion 412 is connected to the stepped surface 421. Through the above design, this disclosure can achieve planar docking between the assembly portion of the valve seat 420 and the valve tube 410. When using, for example, laser welding to connect the valve seat 420 and the valve tube 410, it is more conducive to the implementation of the laser welding process and suitable for realizing an assembly process in which the end of the valve tube 410 is docked to the stepped structure and then welded and fixed. The process is simple and does not require a pre-positioning fixture.

[0066] In one embodiment of this disclosure, the valve seat 420 and the valve tube 410 can be connected by a welding process, such as a fusion welding process, specifically a laser welding process, an argon arc welding process, etc.

[0067] In one embodiment of this disclosure, the valve seat 420 can be made of carbon steel or stainless steel. Through the above design, since the valve seat 420 is made of stainless steel or similar materials, this disclosure makes the valve seat 420 suitable for connection to the valve pipe 410 via welding processes such as laser welding, which helps reduce process difficulty and cost. Furthermore, since stainless steel is less expensive than other metal materials (such as copper), this disclosure further reduces material costs, thus meeting market demands.

[0068] In one embodiment of this disclosure, the valve tube 410 can be made of carbon steel or stainless steel. Through the above design, since the valve tube 410 is made of stainless steel or similar materials, this disclosure makes the valve tube 410 suitable for connection to the valve seat 420 via welding processes such as laser welding, which helps reduce process difficulty and cost. Furthermore, since stainless steel is less expensive than other metal materials (such as copper), this disclosure further reduces material costs, thus meeting market demands.

[0069] like Figures 1 to 3 As shown, in one embodiment of this disclosure, the oil separator may further include an outlet connector 440, which is connected to the end of the valve pipe 410 away from the valve seat 420 (i.e., the end of the second part 412 extending out of the cylinder 100). With the above design, the oil separator can use the outlet connector 440 to connect the valve pipe 410 to related components.

[0070] Based on the design of the oil separator including the vent connector 440, in one embodiment of this disclosure, taking the valve pipe 410 as being made of stainless steel, the vent connector 440 can be made of copper, specifically, for example, red copper or brass. Through the above design, for application scenarios where the relevant components are made of copper, such as when the components and pipes of a refrigeration system are made of copper, this disclosure can utilize the vent connector 440 to achieve an effective connection between the valve pipe 410 and the relevant components. In other embodiments of this disclosure, when the relevant components are made of stainless steel, the vent connector 440 may not be provided, and the end of the valve pipe 410 away from the valve seat 420 can be directly connected to the relevant components, and this is not limited to the above embodiments.

[0071] Based on the design of the second part 412 of the valve pipe 410 being connected to the air outlet connector 440, in one embodiment of this disclosure, the valve pipe 410 and the air outlet connector 440 can be connected by welding process, specifically brazing process, such as flame brazing, furnace brazing, etc.

[0072] like Figure 4As shown, in one embodiment of this disclosure, the one-way valve 400 can be gravity-driven, meaning the valve core 430 is movably disposed in the valve cavity 4101. Specifically, when the medium flow direction in the valve tube 410 is the direction of outflow from the cylinder 100, the valve core 430 and the valve seat 420 are spaced apart, so that the medium entering the valve cavity 4101 through the valve hole 4201 flows through the flow channel between the valve core 430 and the valve tube 410 (e.g., the flow channel between the body 431 and the inner wall of the valve tube 410 that is not occupied by the tail fin 432), and can further flow out through the valve tube 410. When the valve core 430 and the valve hole 4201 are sealed together, the medium cannot flow between the valve tube 410 and the cylinder 100. (For example, the flow channel between the body 431 and the inner wall of the valve tube that is not occupied by the tail fin 432, the flow space formed by adjacent tail fins and the inner wall of the valve tube, that is, the flow channel), and can further be discharged through the valve tube 410. Furthermore, when the medium in the valve pipe flows from the outside, that is, when the flow trend of the medium in the valve pipe is towards the direction of flowing into the cylinder 100 (i.e., reverse), under the pressure of the medium, the valve core 430 moves towards the valve seat 420 and comes into contact with the valve seat 420. At this time, the valve core 430 blocks the valve hole 4201. At this time, the valve core 430 can cut off the flow between the cylinder and the valve cavity on the outlet pipe, so that the medium cannot flow between the valve cavity and the cylinder 100. This can prevent the fluid in the cylinder from flowing into the valve cavity and then flowing out through the outlet pipe, and prevent reverse flow in the outlet pipe.

[0073] Based on the gravity-driven design of the one-way valve 400, in one embodiment of this disclosure, the valve orifice 4201 and the valve core 430 can each be provided with mutually cooperating sealing structures to achieve the sealing function between the valve orifice 4201 and the valve core 430. For example, the orifice wall of the valve orifice 4201 can be provided with a first sealing surface, which can be, for example, an arc surface. Furthermore, the periphery of the valve core 430 can be provided with a second sealing surface, which can be, for example, an inclined surface. Accordingly, the first sealing surface and the second sealing surface are sealed together. In some embodiments, the first sealing surface can also be an inclined surface, and the second sealing surface can also be an arc surface; this is not limited to this embodiment.

[0074] like Figures 4 to 6As shown, based on the gravity-driven design of the one-way valve 400, in one embodiment of this disclosure, the valve core 430 includes a body 431 and at least two tail fins 432. The tail fins 432 are connected to the periphery of the body 431 and extend axially away from the valve seat 420. The at least two tail fins 432 are arranged circumferentially spaced along the body 431. Furthermore, the one-way valve 400 also includes a limiting structure 450. The limiting structure 450 is disposed in the valve cavity 4101 of the first part 411, and the limiting structure 450 can restrict the circumferential rotation of the valve core 430. Through the above design, this disclosure can utilize the limiting structure 450 to restrict the circumferential rotation of the valve core 430. Moreover, by utilizing the design of at least two tail fins 432, the flow space between the valve core 430 and the valve cavity 4101 is divided into at least two flow channels, which helps to improve the stability of the valve core 430's axial movement within the first part 411 and further reduces the risk of valve core 430 deflection.

[0075] like Figure 4 and Figure 5 As shown, based on the design of the one-way valve 400 including a limiting structure 450, in one embodiment of this disclosure, the limiting structure 450 may include a limiting arm 451. The limiting arm 451 is fixed in the valve cavity 4101 of the first part 411, and a portion of the limiting arm 451 is located in the area between two adjacent tail fins 432. With the above design, when the valve core 430 rotates circumferentially by a certain angle, the tail fins 432 abut against the limiting arm 451, preventing the valve core 430 from continuing to rotate.

[0076] like Figure 4 and Figure 5 As shown, based on the design of the limiting structure 450 including the limiting arm 451, in one embodiment of this disclosure, the limiting arm 451 extends axially, and one end of the limiting arm 451 can be connected to the valve seat 420. Through the above design, this disclosure connects the limiting arm 451 to the valve seat 420, and uses the valve seat 420 to fix the limiting arm 451, resulting in a reliable connection and a simple structure.

[0077] like Figure 5 As shown, based on the design of the limiting arm 451 connecting to the valve seat 420, in one embodiment of this disclosure, a mounting hole 4202 can be provided on the end face of the valve seat 420 facing the valve core 430, and one end of the limiting arm 451 can be inserted into the mounting hole 4202. Through the above design, this disclosure further optimizes the connection effect between the limiting arm 451 and the valve seat 420.

[0078] like Figure 4 and Figure 5As shown, based on the design of the limiting structure 450 including limiting arms 451, in one embodiment of this disclosure, the limiting structure 450 may include two limiting arms 451 and a connecting arm 452. The connecting arm 452 is connected between the ends of the two limiting arms 451 that are away from the valve seat 420, and the connecting arm 452 is located on the side of the valve core 430 facing away from the valve seat 420, that is, the limiting structure 450 may be in the form of a "U" shape. Accordingly, the connecting arm 452 is used to limit the movement of the valve core 430 axially away from the valve seat 420. That is, when the valve core 430 moves axially away from the valve seat 420 to the maximum stroke position, the valve core 430 (e.g., the body 431 of the valve core 430) abuts against the connecting arm 452 and is restricted from continuing to move away from the valve seat 420.

[0079] See Figure 7 and Figure 8 As shown, Figure 7 and Figure 8 The diagrams show, respectively, schematic plan views of the limiting structure 450 of the oil separator that embodies the principles of this disclosure in two other exemplary embodiments.

[0080] like Figure 7 and Figure 8 As shown, based on the design of the limiting structure 450, which includes two limiting arms 451 and a connecting arm 452, in some embodiments of this disclosure, the connecting arm 452 can form a limiting protrusion that protrudes towards the valve core 430. Through this design, when the valve core 430 slides axially away from the valve seat 420 to its maximum position, the connecting arm 452 can abut against the body 431 of the valve core 430 to stop the axial sliding of the valve core 430. Furthermore, by utilizing the limiting protrusion design, this disclosure can shorten the axial sliding stroke of the valve core 430, avoid the valve core 430 jamming caused by the continuous sliding of the valve core 430 due to misalignment, and also reduce the sliding noise of the valve core 430.

[0081] Based on the design of forming a limiting protrusion on the connecting arm 452, in one embodiment of this disclosure, the limiting protrusion can be rectangular (e.g., Figure 7 As shown), triangle (as shown) Figure 8 (as shown in the figure) or an arc shape, etc. Specifically, the protrusion can be formed by bending and recessing the connecting arm 452 toward the valve seat 420, as shown in the figure. It is only necessary to form a protruding end, and there is no need to limit the specific shape.

[0082] like Figure 4As shown, based on the design of the limiting structure 450, which includes a limiting arm 451 and a connecting arm 452, in one embodiment of this disclosure, the inner diameter of the first part 411 is larger than the inner diameter of the second part 412. It should be understood that the above description of the inner diameter of different parts of the valve tube 410 does not limit the appearance of the valve tube 410. For example, the appearance of the valve tube 410 can be a shape with one side having a larger diameter and the other side having a smaller diameter, as shown in the figure, or it can be a shape with a uniform outer diameter, or it can be any other possible shape. A transition surface 413 is formed on the inner wall of the valve tube 410 at the connection between the first part 411 and the second part 412. The other end of the limiting arm 451 (i.e., the end away from the valve seat 420, i.e., the connection between the limiting arm 451 and the connecting arm 452) abuts against the transition surface 413. Through the above design, this disclosure connects or limits the two ends of the limiting structure 450 through the valve seat 420 and the transition surface 413, thereby fixing the limiting structure 450 in the valve cavity 4101 of the first part 411.

[0083] like Figure 5 and Figure 6 As shown, in one embodiment of this disclosure, the valve core 430 may be provided with a weight-reducing hole 4301. For example, the weight-reducing hole 4301 may be provided on the body 431 of the valve core 430. Through the above design, this disclosure can reduce the weight of the valve core 430 and reduce the material cost of the valve core 430.

[0084] like Figure 2 As shown, in one embodiment of this disclosure, along the axial direction, the valve seat 420 is closer to the second cylinder opening 102 than the connection between the air inlet pipe 210 and the cylinder 100. Through this design, this disclosure enables the medium entering the cylinder 100 via the air inlet pipe 210 to flow through the region of the cylinder 100 located between the valve hole 4201 and the first cylinder opening 101, resulting in more complete flow of the medium inside the cylinder 100.

[0085] It should be understood that, distinct from Figures 4 to 6 The illustrated embodiment uses a gravity-type check valve 400. In another embodiment not illustrated in this disclosure, the check valve 400 may also be a diaphragm type.

[0086] It should be understood that, distinct from Figure 1 and Figure 2 The illustrated embodiment uses a design where the cylinder 100 is a single integral component. In another embodiment not shown in this disclosure, or in conjunction with the relevant references... Figure 18The structure shown may also include a first sub-cylinder 110 and a second sub-cylinder 120. The opening at one end of the first sub-cylinder 110 is a first opening 101, and the opening at the other end of the first sub-cylinder 110 is open. The opening at one end of the second sub-cylinder 120 is a second opening 102, and the opening at the other end of the second sub-cylinder 120 is open. The second sub-cylinder 120 is connected to the open opening of the first sub-cylinder 110 via its open opening.

[0087] In one embodiment of this disclosure, the cylindrical body 100 may be made of carbon steel or stainless steel.

[0088] In one embodiment of this disclosure, the intake pipe 210 can be made of carbon steel or stainless steel. Through the above design, since the intake pipe 210 is made of stainless steel or similar materials, this disclosure makes the intake pipe 210 suitable for connection to the cylinder 100 via welding processes such as brazing, which helps reduce process difficulty and cost. Furthermore, since stainless steel is cheaper than other metal materials (such as copper), this disclosure further reduces material costs, thus meeting market demands.

[0089] like Figure 1 and Figure 2 As shown, in one embodiment of this disclosure, the material of the air inlet pipe 210 is stainless steel. The oil separator proposed in this disclosure may further include an air inlet connector 220, which is connected to the end of the air inlet pipe 210 away from the cylinder 100. The material of the air inlet connector 220 may be copper, specifically, for example, red copper or brass. Through the above design, for application scenarios where the material of related components is copper, such as when the material of components and pipes in a refrigeration system is copper, this disclosure can utilize the air inlet connector 220 to achieve an effective connection between the air inlet pipe 210 and the related components. In other embodiments of this disclosure, when the material of the related components is stainless steel, this disclosure may also omit the air inlet connector 220, in which case the end of the air inlet pipe 210 away from the cylinder 100 can be directly connected to the related components, and is not limited to the above embodiments.

[0090] Based on the design of the intake pipe 210 connected to the intake connector 220, in one embodiment of this disclosure, the intake pipe 210 and the intake connector 220 can be connected by welding process, specifically brazing process, such as flame brazing, furnace brazing, etc.

[0091] In one embodiment of this disclosure, the return oil pipe 310 can be made of carbon steel or stainless steel. Through the above design, since the return oil pipe 310 is made of stainless steel or similar materials, this disclosure makes the return oil pipe 310 suitable for connection to the cylinder 100 via welding processes such as brazing, which helps reduce process difficulty and cost. Furthermore, since stainless steel is less expensive than other metal materials (such as copper), this disclosure further reduces material costs, thus meeting market demands.

[0092] like Figure 1 and Figure 2 As shown, in one embodiment of this disclosure, the oil return pipe 310 is made of stainless steel as an example. The oil separator proposed in this disclosure may further include an oil return connector 320, which is connected to the end of the oil return pipe 310 away from the cylinder 100. The oil return connector 320 can be made of copper, specifically, for example, red copper or brass. Through the above design, for application scenarios where the material of related components is copper, such as when the materials of components and pipes in a refrigeration system are copper, this disclosure can utilize the oil return connector 320 to achieve an effective connection between the oil return pipe 310 and the related components. In other embodiments of this disclosure, when the material of the related components is stainless steel, this disclosure may not include the oil return connector 320, in which case the end of the oil return pipe 310 away from the cylinder 100 can be directly connected to the related components, and is not limited to the above embodiments.

[0093] Based on the design of the return oil pipe 310 connected to the return oil connector 320, in one embodiment of this disclosure, the return oil pipe 310 and the return oil connector 320 can be connected by welding process, specifically brazing process, such as flame brazing, furnace brazing, etc.

[0094] like Figure 2 As shown, in one embodiment of this disclosure, the oil separator proposed in this disclosure may further include a filter 330. The filter 330 is disposed at the second cylinder opening 102 and is used to filter the oil flowing through the second cylinder opening 102 to the return oil pipe 310.

[0095] It should be noted that the oil separators shown in the accompanying drawings and described in this specification are merely a few examples among many oil separators capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the oil separators shown in the accompanying drawings or described in this specification.

[0096] In summary, the oil separator disclosed herein includes a cylinder 100 and a one-way valve 400. The one-way valve 400 allows flow in the direction of outflow from the cylinder 100 and includes a valve pipe 410, a valve seat 420, and a valve core 430. The valve pipe 410 includes a first part 411 and a second part 412 connected axially. The first part 411 is located inside the cylinder 100. One end of the second part 412 is connected to the first part 411, and the other end extends out of the cylinder 100 from the first opening 101. The second part 412 is fixedly connected to the cylinder 100 at the first opening 101. The valve seat 420 is disposed at the end of the first part 411 away from the second part 412 and has a valve hole 4201 that extends axially. The valve core 430 is movably disposed within the first part 411 to isolate or connect the valve hole 4201 and the valve chamber 4101. Through the above design, this disclosure enables the oil separator to achieve a check valve function in the exhaust passage using the one-way valve 400, thus preventing backflow. Based on this, this disclosure arranges the first part 411 and a portion of the second part 412 of the valve pipe 410 inside the cylinder 100, with the other part of the second part 412 extending out of the cylinder 100. That is, the valve pipe 410 is used as the oil separator's exhaust pipe, eliminating the need for the oil separator's exhaust pipe to connect to other one-way valves 400 outside the cylinder 100, reducing the number of external connection points for the oil separator. Simultaneously, the absence of a longer section extending out of the cylinder 100 from the exhaust pipe helps save on piping and reduce costs.

[0097] Based on the above detailed description of several exemplary embodiments of the oil separator proposed in this disclosure, several exemplary embodiments of the manufacturing method of the oil separator proposed in this disclosure will be described below.

[0098] See Figures 9 to 12 , Figure 9 A flowchart of a method for manufacturing an oil separator according to the present disclosure is shown in an exemplary embodiment. Figures 10 to 12 Representatively showing Figure 9 The diagram shows several steps of the manufacturing method. The main steps of the oil separator manufacturing method proposed in this disclosure will be described in detail below with reference to the above-mentioned figures.

[0099] like Figure 9 As shown, in one embodiment of this disclosure, the method for manufacturing an oil separator according to this disclosure is used to manufacture the oil separator disclosed in this disclosure and described in detail in the above embodiments. The method for manufacturing the oil separator includes:

[0100] Step S11: Prepare the intake pipe 210, the oil return pipe 310, and the one-way valve 400;

[0101] Step S12: Prepare the cylinder 100. One end of the cylinder 100 is narrowed to form a second opening 102, while the other end of the cylinder 100 remains open. (See, for example...) Figure 10 As shown;

[0102] Step S13: Connect the air inlet pipe 210 to the side of the cylinder 100, and connect the oil return pipe 310 to the second cylinder inlet 102, for example, refer to Figure 11 As shown;

[0103] Step S14: Insert the end of the first part 411 of the one-way valve 400 away from the second part 412 into the cylinder 100 via the open structure at the other end of the cylinder 100, for example, see... Figure 11 As shown; then the other end of the cylinder 100 is narrowed to form the first opening 101, and the cylinder 100 and the second part 412 are fixedly connected at the first opening 101, for example, see reference. Figure 12 As shown, this is how an oil separator is obtained.

[0104] Through the above design, the manufacturing method of the oil separator proposed in this disclosure can realize the processing and manufacturing of the oil separator proposed in this disclosure. Accordingly, while realizing the check function of the oil separator in the exhaust passage, this disclosure can reduce the number of external connection points of the oil separator, and at the same time eliminates the need for a long length of the exhaust pipe extending out of the cylinder 100. In particular, since this disclosure keeps one end of the cylinder 100 open before installing the one-way valve 400 into the cylinder 100, and then installs the one-way valve 400 into the cylinder 100 through this open structure, it can provide a larger operating space and help reduce the processing difficulty.

[0105] It should be noted that, in Figure 9 In the illustrated method for manufacturing an oil separator, the actual order of implementation of at least some steps is not limited to the order described in the above embodiments. For example, steps S11 and S12 can be performed simultaneously, or step S11 can be performed before step S12, or step S12 can be performed before step S11. Similarly, for steps S13 and S14, step S13 can be performed before step S14, or step S14 can be performed before step S13.

[0106] In one embodiment of this disclosure, the process of “reducing the opening of one end of the cylinder 100 to form a second opening 102” in step S12 can be specifically implemented by a spinning process to reduce the opening of the second opening 102.

[0107] In one embodiment of this disclosure, step S12 may further include the step of machining a flanged hole on the cylinder 100. Based on this, in step S13, "connecting the air inlet pipe 210 to the side of the cylinder 100", the air inlet pipe 210 may be specifically connected to the aforementioned flanged hole.

[0108] In one embodiment of this disclosure, for the step S13 of "connecting the air inlet pipe 210 to the side of the cylinder 100", the connection between the air inlet pipe 210 and the cylinder 100 can be achieved by a brazing process (e.g., but not limited to furnace brazing).

[0109] In one embodiment of this disclosure, for step S13, "connecting the return oil pipe 310 to the second cylinder opening 102", brazing (e.g., but not limited to furnace brazing) can be used to connect the return oil pipe 310 to the cylinder 100. Additionally, in some embodiments of this disclosure, when a filter 330 is provided at the second cylinder opening 102, the filter 330 can be connected to the cylinder 100 using brazing (e.g., but not limited to furnace brazing). For example, the filter 330 can be brazed to the second cylinder opening 102 of the cylinder 100 first, and then the return oil pipe 310 can be brazed to the cylinder 100.

[0110] In one embodiment of this disclosure, the process of “reducing the opening of the other end of the cylinder 100 to form a first opening 101” in step S14 can be specifically implemented by a spinning process to reduce the opening of the first opening 101.

[0111] In one embodiment of this disclosure, the connection between the cylinder 100 and the second part 412 at the first cylinder opening 101 in step S14 can be achieved by a welding process (such as argon arc welding or brazing).

[0112] In one embodiment of this disclosure, when an exhaust connector 440 is connected to the end of the second part 412 of the valve pipe 410 that is away from the first part 411, the exhaust connector 440 and the valve pipe 410 can be connected by a brazing process, such as flame brazing or furnace brazing. Furthermore, the connection between the exhaust connector 440 and the valve pipe 410 can be performed during step S11 or after step S14.

[0113] In one embodiment of this disclosure, when an air inlet connector 220 is connected to the end of the air inlet pipe 210 away from the cylinder 100, the air inlet connector 220 and the cylinder 100 can be connected by a brazing process, such as flame brazing or furnace brazing. Furthermore, the connection between the air inlet connector 220 and the cylinder 100 can be performed during step S11 or after step S13.

[0114] In one embodiment of this disclosure, when a return oil connector 320 is connected to the end of the return oil pipe 310 away from the cylinder 100, the return oil connector 320 and the cylinder 100 can be connected by a brazing process, such as flame brazing or furnace brazing. Furthermore, the connection between the return oil connector 320 and the cylinder 100 can be performed during step S11 or after step S13.

[0115] In one embodiment of this disclosure, the inner diameter of the first part 411 of the one-way valve 400 is larger than the inner diameter of the second part 412. Based on this, the above-mentioned step S11 of preparing the one-way valve 400 can specifically include:

[0116] Preparing pipe fittings;

[0117] A portion of the pipe fitting is flared to form the first part 411, and another portion of the pipe fitting is formed to form the second part 412, thereby forming the valve pipe 410;

[0118] The valve core 430 is installed into the valve cavity 4101 of the first part 411, and the valve seat 420 is connected to the valve tube 410.

[0119] In another embodiment of this disclosure, taking the example that the inner diameter of the first part 411 of the one-way valve 400 is larger than the inner diameter of the second part 412, the above-mentioned step S11 of preparing the one-way valve 400 may further include:

[0120] Prepare pipe fittings;

[0121] A portion of the pipe fitting is narrowed to form the second part 412, and the other part of the pipe fitting is formed to form the first part 411, thereby forming the valve pipe 410;

[0122] The valve core 430 is installed into the valve cavity 4101 of the first part 411, and the valve seat 420 is connected to the valve tube 410.

[0123] In one embodiment of this disclosure, the method for manufacturing the oil separator proposed in this disclosure may further include:

[0124] The air inlet pipe 210, oil return pipe 310 and valve pipe 410 are each blocked from the outlet side of the cylinder 100;

[0125] The surface of the oil separator is phosphated.

[0126] The surface of the oil separator is sprayed with a coating.

[0127] See Figures 13 to 18 , Figure 13 A flowchart of a method for manufacturing an oil separator according to the present disclosure is shown in another exemplary embodiment. Figures 14 to 18 Representatively showing Figure 13The diagram shows a process diagram of some steps in the manufacturing method.

[0128] like Figure 13 As shown, in one embodiment of this disclosure, the method for manufacturing an oil separator proposed in this disclosure is used to manufacture the oil separator proposed in this disclosure and described in detail in the above embodiments, and specifically, it is used to manufacture an oil separator with a design in which "the inner diameter of the first part 411 of the valve pipe 410 is larger than the inner diameter of the second part 412, and the outer diameter of the first part 411 is larger than the outer diameter of the second part 412". Figures 9 to 12 The manufacturing method of the oil separator shown can also be used to manufacture such an oil separator. The manufacturing method of the oil separator includes:

[0129] Step S21: Prepare the intake pipe 210, the oil return pipe 310, and the one-way valve 400;

[0130] Step S22: Prepare the first sub-cylinder 110 and the second sub-cylinder 120. One end of the first sub-cylinder 110 is narrowed to form a first opening 101, and one end of the second sub-cylinder 120 is narrowed to form a second opening 102. The other ends of both the first sub-cylinder 110 and the second sub-cylinder 120 remain open. (See, for example, [reference needed]). Figure 14 and Figure 15 As shown;

[0131] Step S23: Connect the intake pipe 210 to the side of the first sub-cylinder 110. Insert the end of the second part 412 of the one-way valve 400 away from the first part 411 into the cylinder 100 through the open structure at the other end of the first sub-cylinder 110, and let it protrude from the first cylinder opening 101. Then, fix the first sub-cylinder 110 and the second part 412 at the first cylinder opening 101. For example, refer to... Figure 16 As shown, in other words, in this step, the one-way valve 400 and the first sub-cylinder 110 are assembled to form the first assembly.

[0132] Step S24: Connect the return oil pipe 310 to the second cylinder port 102, for example, refer to Figure 17 As shown, in other words, in this step, the return oil pipe 310 and the second sub-cylinder 120 are assembled to form the second assembly.

[0133] Step S25: Connect the other open structure of the first sub-cylinder 110 to the other open structure of the second sub-cylinder 120, for example, refer to Figure 18 As shown, an oil separator is thus obtained. In other words, in this step, the first assembly and the second assembly are assembled to form an oil separator.

[0134] It should be noted that, in Figure 13In the illustrated method for manufacturing an oil separator, the actual order of implementation of at least some steps is not limited by the order of description in the above embodiments. For example, steps S21 and S22 can be implemented simultaneously, or step S21 can be implemented before step S22, or step S22 can be implemented before step S21. Similarly, steps S23 and S24 can be implemented simultaneously, or step S23 can be implemented before step S24, or step S24 can be implemented before step S23. Furthermore, for steps S23, S24, and S25, steps S23 and S24 can be implemented first, followed by step S25, or step S25 can be implemented first, followed by steps S23 and S24.

[0135] In one embodiment of this disclosure, the process of “reducing the opening of one end of the first sub-cylinder 110 to form a first opening 101” in step S22 can be specifically achieved by using a spinning process to reduce the opening of the first opening 101.

[0136] In one embodiment of this disclosure, the process of “reducing the opening of one end of the second sub-cylinder 120 to form a second opening 102” in step S22 can be specifically achieved by using a spinning process to reduce the opening of the second opening 102.

[0137] In one embodiment of this disclosure, step S22 may further include the step of machining a flanged hole on the first sub-cylinder 110. Based on this, in step S23, "connecting the air inlet pipe 210 to the side of the first sub-cylinder 110", the air inlet pipe 210 may be specifically connected to the aforementioned flanged hole.

[0138] In one embodiment of this disclosure, for step S23, “connecting the air inlet pipe 210 to the side of the first sub-cylinder 110”, the connection between the air inlet pipe 210 and the first sub-cylinder 110 can be achieved by brazing (e.g., but not limited to furnace brazing).

[0139] In one embodiment of this disclosure, for step S24, "connecting the return oil pipe 310 to the second cylinder opening 102", a brazing process (e.g., but not limited to furnace brazing) can be used to connect the return oil pipe 310 to the second sub-cylinder 120. Additionally, in some embodiments of this disclosure, when a filter 330 is provided at the second cylinder opening 102, the filter 330 can be connected to the second sub-cylinder 120 using a brazing process (e.g., but not limited to furnace brazing). For example, the filter 330 is first brazed to the second cylinder opening 102 of the second sub-cylinder 120, and then the return oil pipe 310 is brazed to the second sub-cylinder 120.

[0140] In one embodiment of this disclosure, the connection between the first sub-cylinder 110 and the second part 412 at the first cylinder opening 101 in step S23 can be achieved by a welding process (such as argon arc welding or brazing).

[0141] In one embodiment of this disclosure, when an exhaust connector 440 is connected to the end of the second part 412 of the valve pipe 410 that is away from the first part 411, the exhaust connector 440 and the valve pipe 410 can be connected by a brazing process, such as flame brazing or furnace brazing. Furthermore, the connection between the exhaust connector 440 and the valve pipe 410 can be performed during step S21, after step S23, or after step S25.

[0142] In one embodiment of this disclosure, when an air inlet connector 220 is connected to the end of the air inlet pipe 210 away from the cylinder 100, the air inlet connector 220 and the cylinder 100 can be connected by a brazing process, such as flame brazing or furnace brazing. Furthermore, the connection between the air inlet connector 220 and the cylinder 100 can be performed during step S21, after step S23, or after step S25.

[0143] In one embodiment of this disclosure, when a return oil connector 320 is connected to the end of the return oil pipe 310 away from the cylinder 100, the return oil connector 320 and the cylinder 100 can be connected by a brazing process, such as flame brazing or furnace brazing. Furthermore, the connection between the return oil connector 320 and the cylinder 100 can be performed during step S21, after step S24, or after step S25.

[0144] In an embodiment not illustrated in this disclosure, the method for manufacturing the oil separator proposed in this disclosure can also employ a multi-section (three or more sections) sub-cylinder design. Specifically, in Figure 13 Based on the illustrated method for manufacturing an oil separator, step S22 can be further described as follows: A first sub-cylinder 110, a second sub-cylinder 120, and at least one third sub-cylinder are prepared. One end of the first sub-cylinder 110 is narrowed to form a first opening 101, and one end of the second sub-cylinder 120 is narrowed to form a second opening 102. The other ends of both the first and second sub-cylinders 110 and 120 are kept open, and both ends of each third sub-cylinder are kept open. Accordingly, step S25 can be further described as follows: The other end of the first sub-cylinder 110, the two ends of each third sub-cylinder, and the other end of the second sub-cylinder 120 are connected sequentially to obtain the oil separator.

[0145] It should be noted that the methods of manufacturing the oil separator shown in the accompanying drawings and described in this specification are merely a few examples of many manufacturing methods that can employ the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or step of the methods of manufacturing the oil separator shown in the accompanying drawings or described in this specification.

[0146] In summary, the manufacturing method of the oil separator proposed in this disclosure can realize the processing and manufacturing of the oil separator proposed in this disclosure. Accordingly, based on realizing the check function of the oil separator in the exhaust passage, this disclosure can reduce the number of external connection points of the oil separator, and at the same time, it does not require a long length of the part of the exhaust pipe extending out of the cylinder 100.

[0147] The foregoing has described and / or illustrated exemplary embodiments of the oil separator and its manufacturing method as disclosed herein. However, the embodiments of this disclosure are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms “a,” “an,” and “the above” are used to indicate the presence of one or more elements / components / etc. The terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to those listed. Furthermore, the terms “first” and “second” in the claims and description are used only as illustrative marks and are not intended to limit the numerical scope of the object.

[0148] Although the oil separator and the method of manufacturing the oil separator have been described according to different specific embodiments, those skilled in the art will recognize that modifications may be made to the implementation of the disclosure within the spirit and scope of the claims.

Claims

1. An oil separator, characterized in that, include: A cylindrical body (100) has a first opening (101) at its top and a second opening (102) at its bottom; An air intake pipe (210) is connected to the side of the cylinder (100); The return oil pipe (310) is connected to the second cylinder port (102); A one-way valve (400) that allows flow in the direction of exiting the cylinder (100), the one-way valve (400) comprising: A valve tube (410) having a valve cavity (4101) includes a first part (411) and a second part (412) connected axially. The first part (411) is located inside the cylinder (100). One end of the second part (412) is connected to the first part (411), and the other end extends out of the cylinder (100) from the first cylinder opening (101). The second part (412) is fixedly connected to the cylinder (100) at the first cylinder opening (101). A valve seat (420) is disposed at the end of the first part (411) away from the second part (412) and is provided with a valve hole (4201) that extends through the axial direction, the valve hole (4201) being connected to the valve cavity (4101); A valve core (430) is movably disposed within the first part (411) to isolate or connect the valve hole (4201) and the valve cavity (4101).

2. The oil separator according to claim 1, characterized in that, The valve seat (420) includes an assembly part, which is provided with a stepped structure. The stepped structure has a stepped surface (421) perpendicular to the axial direction. The stepped surface (421) is annular, and the end of the first part (411) away from the second part (412) is connected to the stepped surface (421).

3. The oil separator according to claim 1, characterized in that, The valve seat (420) and the valve tube (410) are connected by a welding process.

4. The oil separator according to claim 1, characterized in that: The valve seat (420) is made of carbon steel or stainless steel; and / or The valve tube (410) is made of carbon steel or stainless steel.

5. The oil separator according to claim 1, characterized in that, The valve tube (410) is made of stainless steel; the end of the second part (412) extending out of the cylinder (100) is connected to an air outlet connector (440).

6. The oil separator according to claim 1, characterized in that, The one-way valve (400) is gravity-driven, and the valve core (430) is movably disposed in the valve cavity (4101). When the medium in the valve tube (410) flows in the direction of flowing out of the cylinder (100), the valve core (430) and the valve seat (420) are arranged at intervals so that the medium entering the valve cavity (4101) through the valve hole (4201) flows through the flow channel between the valve core (430) and the valve tube (410). When the valve core (430) and the valve hole (4201) are sealed together, the medium cannot flow between the valve tube (410) and the cylinder (100).

7. The oil separator according to claim 6, characterized in that, The valve core (430) includes a body (431) and at least two tail wings (432); the tail wings (432) are connected to the periphery of the body (431) and extend axially away from the valve seat (420); at least two tail wings (432) are arranged circumferentially around the body (431). The one-way valve (400) also includes: The limiting structure (450) includes: Two limiting arms (451) are fixed in the valve cavity (4101) of the first part (411) and extend axially. One end of the limiting arm (451) is connected to the valve seat (420). A portion of the limiting arm (451) is located in the area between two adjacent tail fins (432) to limit the circumferential rotation of the valve core (430). A connecting arm (452) is connected between the ends of the two limiting arms (451) away from the valve seat (420). The connecting arm (452) is located on the side of the valve core (430) facing away from the valve seat (420). The connecting arm (452) is used to restrict the axial movement of the valve core (430) away from the valve seat (420).

8. The oil separator according to claim 7, characterized in that, The valve seat (420) has an assembly hole (4202) on its end face facing the valve core (430), and one end of the limiting arm (451) is inserted into the assembly hole (4202).

9. The oil separator according to claim 7, characterized in that, The inner diameter of the first part (411) is larger than the inner diameter of the second part (412), and the inner wall of the valve pipe (410) forms a transition surface (413) at the connection between the first part (411) and the second part (412); wherein, the other end of the limiting arm (451) abuts against the transition surface (413).

10. The oil separator according to claim 1, characterized in that, The one-way valve (400) is a diaphragm type.

11. The oil separator according to claim 1, characterized in that, Along the axial direction, the valve seat (420) is closer to the second cylinder opening (102) than the connection between the air inlet pipe (210) and the cylinder body (100).

12. The oil separator according to claim 1, characterized in that, The cylindrical body (100) includes: The first sub-cylinder (110) has a cylinder opening at one end called the first cylinder opening (101) and a cylinder opening at the other end that is an open structure. The second sub-cylinder (120) has a cylinder opening at one end called the second cylinder opening (102) and a cylinder opening at the other end that is an open structure. The second sub-cylinder (120) is connected to the open structure of the first sub-cylinder (110) with the cylinder opening of the open structure.

13. The oil separator according to claim 1, characterized in that, The oil separator also includes: A filter (330) is provided at the second cylinder opening (102) for filtering the oil flowing through the second cylinder opening (102) to the return oil pipe (310).

14. The oil separator according to claim 1, characterized in that, The inner diameter of the first part (411) is larger than the inner diameter of the second part (412), and the outer diameter of the first part (411) is larger than the outer diameter of the second part (412).

15. A method for manufacturing an oil separator, characterized in that, For manufacturing the oil separator according to any one of claims 1 to 14; the method for manufacturing the oil separator includes: Prepare the intake pipe (210), the oil return pipe (310), and the one-way valve (400); Prepare the cylindrical body (100), and perform a necking process on one end of the cylindrical body (100) to form the second cylindrical opening (102), while keeping the other end of the cylindrical body (100) open. Connect the air inlet pipe (210) to the side of the cylinder (100) and connect the oil return pipe (310) to the second cylinder opening (102); The end of the first part (411) of the one-way valve (400) away from the second part (412) is inserted into the cylinder (100) via the open structure at the other end of the cylinder (100). Then, the open structure at the other end of the cylinder (100) is narrowed to form the first cylinder opening (101). The cylinder (100) and the second part (412) are fixedly connected at the first cylinder opening (101) to obtain the oil separator.

16. The method for manufacturing an oil separator according to claim 15, characterized in that, The inner diameter of the first part (411) is larger than the inner diameter of the second part (412); wherein the step of preparing the one-way valve (400) includes: First, a pipe fitting is prepared. Then, a portion of the pipe fitting is flared to form the first part (411), and the other part of the pipe fitting forms the second part (412), thereby forming the valve pipe (410). The valve core (430) is then inserted into the valve cavity (4101) of the first part (411), and the valve seat (420) is connected to the valve pipe (410); or First, a pipe fitting is prepared, and then a part of the pipe fitting is narrowed to form the second part (412), and the other part of the pipe fitting forms the first part (411), thereby forming the valve pipe (410). Then, the valve core (430) is installed into the valve cavity (4101) of the first part (411), and the valve seat (420) is connected to the valve pipe (410).

17. The method for manufacturing an oil separator according to claim 15, characterized in that, The method for manufacturing the oil separator further includes: The air inlet pipe (210), the oil return pipe (310), and the valve pipe (410) are each blocked from extending out of the outlet side of the cylinder (100); The surface of the oil separator is subjected to phosphating treatment; The surface of the oil separator is sprayed with a coating.

18. A method for manufacturing an oil separator, characterized in that, For manufacturing the oil separator of claim 14; the method for manufacturing the oil separator includes: Prepare the intake pipe (210), the oil return pipe (310), and the one-way valve (400); Prepare a first sub-cylinder (110) and a second sub-cylinder (120). The first cylinder opening (101) is formed by narrowing one end of the first sub-cylinder (110), and the second cylinder opening (102) is formed by narrowing one end of the second sub-cylinder (120). Keep the other end of the first sub-cylinder (110) and the second sub-cylinder (120) open. The air inlet pipe (210) is connected to the side of the first sub-cylinder (110), and the end of the second part (412) of the one-way valve (400) away from the first part (411) is inserted into the cylinder (100) through the open structure at the other end of the first sub-cylinder (110) and protrudes from the first cylinder opening (101). Then the first sub-cylinder (110) and the second part (412) are fixedly connected at the first cylinder opening (101). Connect the return oil pipe (310) to the second cylinder port (102); The oil separator is obtained by connecting the open structure at the other end of the first sub-cylinder (110) to the open structure at the other end of the second sub-cylinder (120).

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