Oil separator and refrigerating system thereof

Abstract

The utility model relates to the technical field of refrigerating systems, in particular to an oil separator and a refrigerating system thereof. The oil separator comprises a barrel, an air outlet pipe, an oil outlet pipe and an air inlet pipe, the barrel is hollow to form a cavity, one end of the air outlet pipe extends into the cavity through a first communicating hole, and the part, located in the cavity, of the air outlet pipe is a first pipe section; one end of the oil outlet pipe is mounted at the third communicating hole and communicates with the cavity; one end of the air inlet pipe extends into the cavity through the second communicating hole, the part, located in the cavity, of the air inlet pipe is a second pipe section, the outlet end of the second pipe section faces the outer pipe wall of the first pipe section, and the axis of the second pipe section is perpendicular to and intersects with the axis of the first pipe section; a liquid blocking piece is arranged on the peripheral wall of the end, away from the first communicating hole, of the air outlet pipe and extends outwards in the radial direction from the axis of the air outlet pipe. The air conditioner has the advantages that the flowing path of the lubricating oil is guided by arranging the liquid blocking piece, so that the dripping path of the lubricating oil is far away from the pipe opening of the air inlet pipe, and secondary oil carrying of a refrigerant is prevented.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration system technology, and in particular to an oil separator and its refrigeration system. Background Technology

[0002] When an air conditioner compressor is running, it needs lubricating oil for lubrication. However, when the compressor discharges refrigerant, the lubricating oil will be discharged along with the refrigerant. This will increase the thermal resistance of the air conditioning system piping, reduce the heat transfer effect, and thus reduce the cooling or heating efficiency of the air conditioning system.

[0003] Therefore, an oil separator is installed between the compressor and condenser of the air conditioning system. The oil separator is used to separate the lubricating oil and refrigerant discharged from the compressor outlet, and the separated lubricating oil is returned to the compressor through the oil outlet pipe to ensure the operation of the compressor.

[0004] An oil separator typically includes a cylinder, an inlet pipe, an outlet pipe, and an oil outlet pipe. The oil outlet pipe is located at the bottom of the cylinder, and the outlet pipe is located at the top. The inlet pipe passes through the side wall of the cylinder and injects refrigerant into the cylinder. After separation, the separated lubricating oil flows to the oil outlet pipe, while the gaseous refrigerant flows out from the outlet pipe. To improve the separation effect, some oil separators have the inlet pipe aligned with the outlet pipe, so that the refrigerant entering the cylinder from the inlet pipe impacts the outer wall of the outlet pipe, thus causing oil-gas separation. However, this arrangement causes oil droplets to condense on the outer wall of the outlet pipe and drip downwards, only to be carried out again by the refrigerant at the outlet pipe opening. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an oil separator.

[0006] An oil separator includes: a cylindrical body with a hollow interior forming a chamber; a first connecting hole at one end of the cylindrical body along its axial direction; an outlet pipe passing through the first connecting hole and extending one end of the outlet pipe into the chamber; the portion of the outlet pipe within the chamber forming a first pipe segment; and an inlet pipe, one end of which extends into the chamber through a second connecting hole located on the side wall of the cylindrical body; the portion of the inlet pipe within the chamber forming a second pipe segment; the outlet end of the second pipe segment facing the outer wall of the first pipe segment and being spaced apart from the first pipe segment; a plane perpendicular to the axis of the second pipe segment is defined along its axial direction, and the projections of the outlet end of the second pipe segment and the outer wall of the first pipe segment onto this plane at least partially overlap; wherein a liquid-blocking element is provided on the outer peripheral wall of the end of the outlet pipe away from the first connecting hole, and the liquid-blocking element extends radially outward along the outlet pipe.

[0007] In this configuration, the oil-gas mixture of refrigerant enters the chamber inside the cylinder through the inlet pipe, where gas-liquid separation is completed. The gaseous refrigerant flows out through the outlet pipe and the first connecting hole. The axis of the second pipe section is perpendicular to and intersects the axis of the first pipe section. Therefore, the refrigerant entering the chamber from the second pipe section will collide with the first pipe section and cause oil-gas separation, thereby improving the separation efficiency of the oil separator. Since this separation method causes some lubricating oil to condense on the outer wall of the outlet pipe and drip downwards, this application uses a liquid-blocking element to guide the flow path of the lubricating oil. Due to the radially outward extension of the liquid-blocking element, the dripping path of the lubricating oil will be further away from the inlet of the inlet pipe, and thus further away from the flow path of the refrigerant in the outlet pipe. This prevents the gaseous refrigerant from carrying the lubricating oil out of the chamber through the outlet pipe, thus affecting the oil separation efficiency of the oil separator.

[0008] In one embodiment, the liquid-blocking element is coaxially arranged with the first pipe section, and the liquid-blocking element is formed by the pipe wall of the first pipe section protruding radially outward; or, the liquid-blocking element is connected to the outer peripheral wall of the first pipe section.

[0009] In one embodiment, along the axial direction of the air outlet pipe, the liquid baffle is spaced apart from the opening of the first pipe section, the shortest distance between the liquid baffle and the opening of the first pipe section is L1, and the shortest distance between the axis of the air inlet pipe and the opening of the first pipe section is h, where L1 satisfies 0≤L1≤0.9h.

[0010] In one embodiment, along the axial direction of the vent pipe, the liquid-blocking member is disposed at the opening of the first pipe section, and the side of the liquid-blocking member away from the first connecting hole is flush with the opening of the first pipe section.

[0011] In one embodiment, the liquid-blocking element is configured as an arc-shaped protrusion extending radially outward from the outer peripheral wall of the first pipe section; or,

[0012] The liquid-blocking component is configured as a plate-like structure extending radially outward from the outer peripheral wall of the first pipe section.

[0013] In one embodiment, the height of the liquid-blocking element protruding from the outer peripheral wall of the first pipe section is H, the diameter of the first pipe section is D1, and the straight-line distance between the outer peripheral wall of the first pipe section and the inner wall of the cylinder is L2, wherein H satisfies: D1<H≤L2 / 2.

[0014] In one embodiment, the liquid-blocking member is connected to the opening of the first pipe section and extends in a bent direction away from the first connecting hole;

[0015] The outer diameter of the liquid-blocking element gradually increases along the direction away from the first connecting hole.

[0016] In one embodiment, the liquid-blocking component has a flow port for the flow of heat exchange medium. The inner diameter of the end of the flow port connected to the first pipe section is the same as the inner diameter of the first pipe section. The inner diameter of the flow port gradually increases along the direction away from the first pipe section.

[0017] In one embodiment, the outer diameter of the end of the liquid-blocking member away from the first pipe section is D2, the diameter of the first pipe section is D1, and D2 satisfies: D1<D2≤1.8D1.

[0018] This utility model also provides a refrigeration system, including the oil separator described above.

[0019] This invention guides the flow path of lubricating oil by setting up a liquid-blocking component. The radially outward extension of the liquid-blocking component ensures that the lubricating oil drips away from the inlet of the air inlet pipe, thus preventing gaseous refrigerant from carrying the lubricating oil out of the chamber through the outlet pipe and affecting the oil separation efficiency of the oil separator. Attached Figure Description

[0020] Figure 1 A cross-sectional view of one embodiment of the oil separator provided by this utility model;

[0021] Figure 2 The liquid-blocking component of the oil separator provided by this utility model is a cross-sectional view of an arc-shaped protrusion;

[0022] Figure 3 The liquid-blocking component of the oil separator provided by this utility model is a plate-shaped structure.

[0023] The symbols in the diagram represent the following meanings:

[0024] 100. Oil separator; 10. Cylinder; 11. Chamber; 12. First connecting hole; 13. Third connecting hole; 14. Second connecting hole; 20. Air outlet pipe; 21. First pipe section; 30. Air inlet pipe; 31. Second pipe section; 40. Oil outlet pipe; 50. Liquid baffle; 51. Flow port. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it can be directly on the other mechanism or there may be an intervening mechanism. When a mechanism is considered to be "connected to" another mechanism, it can be directly connected to the other mechanism or there may be an intervening mechanism. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0030] This utility model provides an oil separator 100, which can prevent the lubricating oil on the outer wall of the outlet pipe 20 from being carried out again by the refrigerant at the outlet of the outlet pipe 20, thereby improving the separation efficiency of the oil separator 100.

[0031] Please see Figures 1-3The oil separator 100 includes a cylinder 10, an air outlet pipe 20, an oil outlet pipe 40, and an air inlet pipe 30. The cylinder 10 is hollow, forming a chamber 11. Along the axial direction of the cylinder 10, one end of the cylinder 10 has a first connecting hole 12, and the other end has a third connecting hole 13. The side wall of the cylinder 10 has a second connecting hole 14. The first connecting hole 12, the third connecting hole 13, and the second connecting hole 14 all communicate with the chamber 11. One end of the air outlet pipe 20 extends into the chamber 11 through the first connecting hole 12, and the portion of the air outlet pipe 20 within the chamber 11 is a first pipe section 21. One end of the oil outlet pipe 40 is installed at the third connecting hole 13 and communicates with the chamber 11. One end of the trachea 30 extends into the chamber 11 through the second connecting hole 14, which is located on the side wall of the cylinder 10. The portion of the trachea 30 located in the chamber 11 is the second pipe section 31. The outlet end of the second pipe section 31 faces the outer wall of the first pipe section 21 and is spaced apart from the first pipe section 21. A plane perpendicular to the axis of the second pipe section 31 is defined along the axial direction of the second pipe section 31. The projections of the outlet end of the second pipe section 31 and the outer wall of the first pipe section 21 on this plane at least partially overlap. A liquid-blocking member 50 is provided on the outer peripheral wall of the end of the outlet pipe 20 away from the first connecting hole 12. The liquid-blocking member 50 extends outward along the radial direction of the outlet pipe 20.

[0032] Thus, the oil-gas mixture of refrigerant enters the chamber 11 inside the cylinder 10 from the inlet pipe 30, and gas-liquid separation is completed in the chamber 11. The liquid lubricating oil flows to the oil outlet pipe 40 through the third connecting hole 13, while the gaseous refrigerant flows out through the outlet pipe 20 and the first connecting hole 12. The axis of the second pipe section 31 is perpendicular to and intersects the axis of the first pipe section 21. Therefore, the refrigerant entering the chamber 11 from the second pipe section 31 will collide with the first pipe section 21 and cause oil-gas separation, thereby improving the separation efficiency of the oil separator 100. Since this separation method will cause some lubricating oil to condense on the outer wall of the outlet pipe 20 and drip downwards, this application uses a liquid baffle 50 to guide the flow path of the lubricating oil. Because of the radial outward extension of the liquid baffle 50, the dripping path of the lubricating oil will be further away from the inlet of the air inlet pipe 30, and thus further away from the flow path of the refrigerant in the air outlet pipe 20. This prevents the gaseous refrigerant from carrying the lubricating oil out of the chamber 11 through the air outlet pipe 20, thus affecting the oil separation efficiency of the oil separator 100.

[0033] It should be explained that the first pipe section 21 and the second pipe section 31 are both parts that are completely inside the chamber 11. The parts where the exhaust pipe 20 is welded to the cylinder 10 and the parts where the intake pipe 30 is welded to the cylinder 10 do not belong to the first pipe section 21 and the second pipe section 31.

[0034] Preferably, the axis of the second pipe section 31 is perpendicular to and intersects the axis of the first pipe section 21, so that the refrigerant completely impacts the pipe wall of the outlet pipe 20, thereby improving the gas-liquid separation efficiency.

[0035] Furthermore, the liquid-blocking component 50 is coaxially arranged with the first pipe section 21. The liquid-blocking component 50 is formed by protruding radially outward from the pipe wall of the first pipe section 21, or the liquid-blocking component 50 is formed separately and connected to the outer peripheral wall of the first pipe section 21. The above-mentioned cooperation between the liquid-blocking component 50 and the first pipe section 21 ensures that the lubricating oil will flow onto the liquid-blocking component 50 regardless of the path it flows down, and the coaxial arrangement makes the liquid-blocking component 50 provide a more uniform guiding effect for the lubricating oil.

[0036] For example, please see Figure 2 Along the axial direction of the outlet pipe 20, the liquid-blocking component 50 is spaced apart from the opening of the first pipe section 21. The shortest distance between the axis of the inlet pipe 30 and the opening of the first pipe section 21 is h, and the distance between the liquid-blocking component 50 and the opening of the first pipe section 21 is L1, where L1 satisfies: 0 ≤ L1 ≤ 0.9h. This ensures that the refrigerant entering through the inlet pipe 30 impacts the wall of the outlet pipe 20 and is blocked by the liquid-blocking component 50.

[0037] For example, please see Figure 2 The liquid baffle 50 is configured as an arc-shaped protrusion extending radially outward from the outer peripheral wall of the first pipe section 21. Thus, the liquid baffle 50 has a simple structure, and its arc shape reduces lubricant buildup and prevents downward flow.

[0038] In another embodiment, please refer to Figure 3 The liquid-blocking component 50 is configured as a plate-like structure that protrudes radially outward from the outer peripheral wall of the first pipe section 21. The plate-like structure provides a blocking effect for the lubricating oil and guides the dripping path of the lubricating oil further away from the outlet of the vent pipe 20.

[0039] Furthermore, the height of the liquid-blocking component 50 protruding from the outer peripheral wall of the first pipe section 21 is H, the diameter of the first pipe section 21 is D1, and the straight-line distance between the outer peripheral wall of the first pipe section and the inner wall of the cylinder 10 is L2. H satisfies: D1<H≤L2 / 2.

[0040] In this way, it can prevent the liquid-blocking component 50 from being too low to effectively block the lubricating oil, and it can also avoid the problem of excessive space being occupied by the excessively high protrusion, causing turbulent airflow and resulting in refrigerant pressure loss.

[0041] Understandably, in this embodiment, the liquid-blocking member 50 can be spaced apart from the opening of the vent pipe 20, or it can be directly connected to the edge of the opening of the vent pipe 20. In another embodiment, please refer to... Figure 3The side of the liquid-blocking component 50 away from the first connecting hole 12 is flush with the opening of the first pipe section 21. Regardless of where the liquid-blocking component 50 is connected to the air outlet pipe 20 in the axial direction, it extends radially outward to block the lubricating oil.

[0042] Preferably, the two axial sides of the plate-shaped liquid-blocking member 50 are perpendicular to the axis of the vent pipe 20, that is, the liquid-blocking member 50 is perpendicular to the outer peripheral wall of the vent pipe 20, so that the blocking effect on lubricating oil is the same in every direction. In other embodiments, the angle between the plate-shaped liquid-blocking member 50 and the pipe wall of the vent pipe 20 is greater than 90° to prevent lubricating oil from accumulating.

[0043] In another embodiment, please refer to Figure 1 The liquid-blocking component 50 is connected to the opening of the first pipe section 21 and bends and extends away from the first connecting hole 12; along the direction away from the first connecting hole 12, the outer diameter of the liquid-blocking component 50 gradually increases. In this way, the gradually increasing outer diameter of the liquid-blocking component 50 can form an arc-shaped extension structure, allowing the lubricating oil to always flow downward, preventing the lubricating oil from accumulating on the liquid-blocking component 50, and gradually moving away from the opening of the outlet pipe 20 while flowing downward, thereby preventing the gaseous refrigerant from carrying lubricating oil out again.

[0044] Furthermore, the liquid-blocking component 50 is internally constructed with a flow port 51 for the flow of the heat exchange medium. The inner diameter of the end of the flow port 51 connected to the first pipe section 21 is the same as the inner diameter of the first pipe section 21. Along the direction away from the first pipe section 21, the inner diameter of the flow port 51 gradually increases. In this way, the gradually changing flow port 51 can prevent the refrigerant from forming turbulence at this location, reducing refrigerant pressure loss. That is to say, in other embodiments, while the outer diameter of the liquid-blocking component 50 gradually increases, the diameter of the flow port 51 formed by the liquid-blocking component 50 can remain unchanged. However, if the outer diameter of the liquid-blocking component 50 is sufficient to accommodate the change in the flow port 51, the outer diameter of the liquid-blocking component 50 can remain unchanged while the flow port 51 gradually increases.

[0045] The outer diameter of the end of the liquid-blocking component 50 away from the first pipe section 21 is D2, and the diameter of the first pipe section 21 is D1, satisfying: D1<D2≤1.8D1.

[0046] In this way, it can prevent the outer diameter of the liquid-blocking component 50 from being too small to provide sufficient liquid-blocking effect for the lubricating oil, and also avoid the outer diameter being too large, which would occupy too much space, cause turbulent airflow, and result in refrigerant pressure loss.

[0047] This utility model also provides a refrigeration system, including the oil separator 100 as described above.

[0048] This invention guides the flow path of lubricating oil by setting a liquid-blocking component 50. The liquid-blocking component 50 extends radially outward, causing the lubricating oil dripping path to be far from the inlet of the air inlet pipe 30, thereby preventing the gaseous refrigerant from carrying the lubricating oil out of the chamber 11 through the air outlet pipe 20 and affecting the oil separation efficiency of the oil separator 100.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An oil separator characterized by, The application relates to a gas-liquid separation device, which comprises: a cylinder (10) internally hollowed to form a chamber (11), one end of the cylinder (10) being provided with a first communication hole (12), an air outlet pipe (20) being arranged in the first communication hole (12), one end of the air outlet pipe (20) extending into the chamber (11) through the first communication hole (12), the part of the air outlet pipe (20) in the chamber (11) being a first pipe section (21); an air inlet pipe (30), one end of the air inlet pipe (30) extending into the chamber (11) through a second communication hole (14), the second communication hole (14) being arranged on the side wall of the cylinder (10), the part of the air inlet pipe (30) in the chamber (11) being a second pipe section (31), the outlet end of the second pipe section (31) being directed towards the outer wall of the first pipe section (21) and being arranged in a gap with the first pipe section (21), a plane perpendicular to the axis of the second pipe section (31) being defined along the axis of the second pipe section (31), the projection of the outlet end of the second pipe section (31) and the outer wall of the first pipe section (21) on the plane at least partially overlapping each other; wherein a liquid blocking member (50) is arranged on the outer peripheral wall of the end of the air outlet pipe (20) away from the first communication hole (12), the liquid blocking member (50) extending radially and outwardly from the air outlet pipe (20).

2. The oil separator of claim 1, wherein The liquid blocking member (50) is coaxially arranged with the first pipe section (21), the liquid blocking member (50) being formed by the radial outward protrusion of the pipe wall of the first pipe section (21); or the liquid blocking member (50) is connected to the outer peripheral wall of the first pipe section (21).

3. The oil separator of claim 1, wherein Along the axis of the air outlet pipe (20), the liquid blocking member (50) is arranged in a gap with the pipe opening of the first pipe section (21), the shortest distance between the liquid blocking member (50) and the pipe opening of the first pipe section (21) being L1, the shortest distance between the axis of the air inlet pipe (30) and the pipe opening of the first pipe section (21) being h, L1 satisfying 0<=L1<=0.9h.

4. The oil separator of claim 1, wherein Along the axis of the air outlet pipe (20), the liquid blocking member (50) is arranged at the pipe opening of the first pipe section (21), and the side of the liquid blocking member (50) away from the first communication hole (12) is arranged flush with the pipe opening of the first pipe section (21).

5. The oil separator according to any of claims 1-4, characterized in that The liquid blocking member (50) is arranged as a circular-arc protruding structure extending radially and outwardly from the outer peripheral wall of the first pipe section (21); or The liquid blocking member (50) is arranged as a plate-shaped structure extending radially and outwardly from the outer peripheral wall of the first pipe section (21).

6. The oil separator of claim 5, wherein The height of the liquid blocking member (50) protruding from the outer peripheral wall of the first pipe section (21) is H, the diameter of the first pipe section (21) is D1, and the straight-line distance between the outer peripheral wall of the first pipe section (21) and the inner wall of the cylinder (10) is L2, H satisfying D1 7. The oil separator of claim 1, wherein The liquid blocking member (50) is connected to the pipe opening of the first pipe section (21) and is bent and extended in a direction away from the first communication hole (12). The outer diameter of the liquid blocking member (50) gradually increases in a direction away from the first communication hole (12).

8. The oil separator of claim 7, wherein The liquid blocking member (50) is internally provided with a flow-through opening (51) for the flow of heat exchange medium, the inner diameter of the end of the flow-through opening (51) connected with the first pipe section (21) is the same as the inner diameter of the first pipe section (21), and the inner diameter of the flow-through opening (51) gradually increases in a direction away from the first pipe section (21).

9. The oil separator of claim 7, wherein The outer diameter of the end of the liquid blocking member (50) away from the first pipe section (21) is D2, the diameter of the first pipe section (21) is D1, and D2 satisfies D1 < D2 ≤ 1.8D1.

10. A refrigeration system characterized by, An oil separator comprising the oil separator according to any one of claims 1-9.

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