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 and an air inlet pipe, one end of the air outlet pipe extends into the cavity, the part located in the cavity is a first pipe section, one end of the air inlet pipe extends into the cavity, the part located in the cavity is a second pipe section, and the outlet end of the second pipe section faces the peripheral wall of the first pipe section and is arranged with the second pipe section in a spaced mode. A plane perpendicular to the axis of the second pipe section is defined in the axial direction of the second pipe section, and the projection of the outlet end of the second pipe section and the projection of the outer pipe wall of the first pipe section on the plane are at least partially overlapped; a rough part is constructed on the peripheral wall of the first pipe section, and the roughness of the rough part is larger than that of the other surfaces of the first pipe section. The gas-liquid separator has the advantages that the roughness of the rough part is larger, so that larger surface tension can be provided when the rough part collides with a refrigerant, and the gas-liquid separation effect of the refrigerant is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigerating system technical field especially is related to an oil separator and refrigerating system thereof. BACKGROUND

[0002] When the air conditioner compressor is running, it needs lubricating oil for lubrication, but when the compressor discharges refrigerant, the lubricating oil will be discharged together with the refrigerant, which will increase the thermal resistance of the air conditioning system pipeline and reduce the heat transfer effect, thereby reducing the refrigeration or heating efficiency of the air conditioning system.

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

[0004] The oil separator generally includes a cylinder, an air inlet pipe, an air outlet pipe and an oil outlet pipe. The oil outlet pipe is located at the bottom of the cylinder, and the air outlet pipe is located at the top of the cylinder. The air inlet pipe is arranged on the side wall of the cylinder and injects refrigerant into the cylinder. After the refrigerant is separated in the cylinder, the separated lubricating oil flows to the oil outlet pipe, and the gaseous refrigerant flows out from the air outlet pipe. In order to improve the separation effect of the oil separator, some oil separators are provided with an air inlet pipe corresponding to the air outlet pipe, so that the refrigerant entering the cylinder from the air inlet pipe collides with the outer wall of the air outlet pipe to separate the oil and gas. However, due to the smooth outer wall of the air outlet pipe, the separation efficiency after the collision of the refrigerant is not as expected. SUMMARY

[0005] In view of the above technical problems, the utility model provides an oil separator.

[0006] An oil separator, comprising: a cylinder, which is internally hollow to form a chamber, and has a first communication hole at one end along the axial direction of the cylinder; an air outlet pipe, one end of which extends into the chamber through the first communication hole, and the part of the air outlet pipe located in the chamber is a first pipe segment; an air inlet pipe, one end of which extends into the chamber through a second communication hole, and the second communication hole is located on the side wall of the cylinder, the part of the air inlet pipe located in the chamber is a second pipe segment, the outlet end of the second pipe segment faces the outer pipe wall of the first pipe segment and is arranged with a gap between the first pipe segment, along the axial direction of the second pipe segment, a plane perpendicular to the axial line of the second pipe segment is defined, and the projection of the outlet end of the second pipe segment and the outer pipe wall of the first pipe segment on the plane at least partially overlaps; wherein a rough part is formed on the outer peripheral wall of the first pipe segment, along the axial direction of the second pipe segment, the second pipe segment has a first projection on the first pipe segment; at least part of the rough part overlaps with the first projection; or, along the axial direction of the first pipe segment, at least part of the rough part is located on the side away from the first communication hole of the first projection ； The roughness of the rough part is greater than the roughness of the remaining part of the first pipe segment without the rough part.

[0007] Thus, the oil-gas mixed refrigerant enters the chamber in the cylinder from the gas inlet pipe, and the gas-liquid separation is completed in the chamber, the gaseous refrigerant flows out through the first communication hole by the gas outlet pipe, the axis of the second pipe section is perpendicular to and intersects with the axis of the first pipe section, thus the refrigerant entering the chamber from the second pipe section collides with the first pipe section and oil-gas separation occurs, thereby improving the separation efficiency of the oil separator. In order to further improve the effect of oil-gas separation caused by collision, the utility model sets a rough part on the first pipe section. Since the roughness of the rough part is larger, it can provide greater surface tension when colliding with the refrigerant, that is, the liquid refrigerant is more likely to adhere to the rough part and is not easy to be taken away by the gaseous refrigerant, thus the gas-liquid separation effect of the refrigerant is better.

[0008] In one of the embodiments, a plurality of guide grooves are formed on the outer peripheral wall of the first pipe section, the guide grooves are recessed in the radially inward direction by the outer peripheral wall of the first pipe section, the plurality of guide grooves form the rough part, the guide grooves extend in the axial direction of the first pipe section, the plurality of guide grooves are arranged at intervals in the circumferential direction of the first pipe section, and the adjacent two guide grooves are arranged in parallel.

[0009] In one of the embodiments, along the axial direction of the first pipe section, the guide grooves extend from the pipe opening of the first pipe section to the side of the first projection close to the first communication hole.

[0010] In one of the embodiments, along the radial direction of the first pipe section, the groove depth of the guide grooves is h, and the wall thickness of the first pipe section is H, and h≤0.6H is satisfied.

[0011] In one of the embodiments, along the circumferential direction of the first pipe section, the groove width of the guide grooves is d, and the diameter of the first pipe section is D, and d≤0.3D is satisfied.

[0012] In one of the embodiments, a plurality of guide grooves are formed on the outer peripheral wall of the first pipe section, the guide grooves are recessed in the radially inward direction by the outer peripheral wall of the first pipe section, the plurality of guide grooves form the rough part, and the plurality of guide grooves extend obliquely relative to the axis of the first pipe section and cross communicate.

[0013] In one of the embodiments, the rough part is provided in a net pattern embossing structure or a convex point structure.

[0014] In one of the embodiments, a spiral groove is formed on the outer peripheral wall of the first pipe section, and the spiral groove spirally extends from the pipe opening of the first pipe section towards the first communication opening.

[0015] In one embodiment, the first pipe section and the second pipe section have the same diameter, and the axis of the second pipe section intersects the axis of the first pipe section.

[0016] The utility model further provides a refrigerating system, including the oil separator as described above.

[0017] The utility model discloses a rough part is arranged on the first pipe section of the air outlet pipe in the cylinder, and the gas-liquid separation efficiency of the refrigerant under the gas-liquid mixing state is improved by the rough part with high roughness, the higher the roughness is, the higher the tension provided for the solidified liquid refrigerant is, and the gas-liquid separation effect is better, so that the separation efficiency of the oil separator provided by the utility model is high, and the separation effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the perspective drawing of one of the embodiments of the oil separator provided by the utility model;

[0019] Fig. 2 It is the structural schematic diagram of one of the embodiments of the oil separator provided by the utility model;

[0020] Fig. 3 It is the sectional view of one of the embodiments of the oil separator provided by the utility model.

[0021] The meanings of various symbols in the drawings are as follows:

[0022] 100, oil separator;10, cylinder;11, chamber;12, first communication hole;13, second communication hole;14, third communication hole;20, air outlet pipe;21, first pipe section;30, air inlet pipe;31, second pipe section;40, oil outlet pipe;50, rough part;51, flow guide groove. DETAILED DESCRIPTION

[0023] To make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways other than those specifically described herein, and the present application is not limited to the embodiments described below. It can be apparent that any modification and change can be made on the embodiments described without departing from the scope of the present application.

[0024] It should be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar terms as used herein are for the purpose of description only and are not intended to limit the present application.

[0025] In addition, the terms "first", "second", etc. are used herein only to describe various elements, and are not used to denote or imply relative importance or a number of indicated technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0026] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0027] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0028] The utility model provides a kind of oil separator 100, rough part 50 is arranged on the outer peripheral wall of gas outlet pipe 20 located in chamber 11, the surface roughness of rough part 50 is greater to provide greater surface tension, so that the gas-liquid separator effect after refrigerant collides with rough part 50 is better.

[0029] Please refer to Figs. 1-3The oil separator 100 comprises a cylinder 10, an outlet pipe 20 and an inlet pipe 30. The cylinder 10 has a chamber 11 formed inside. The cylinder 10 has a first communication hole 12 at one end thereof along the axial direction of the cylinder 10. The outlet pipe 20 has a first pipe section 21 which extends into the chamber 11 through the first communication hole 12. The inlet pipe 30 has a second pipe section 31 which extends into the chamber 11 through a second communication hole 13 formed on the side wall of the cylinder 10. The outlet end of the second pipe section 31 is directed towards the outer peripheral wall of the first pipe section 21 and is arranged in a gap with the second pipe section 31. A plane perpendicular to the axial direction of the second pipe section 31 is defined along the axial direction of the second pipe section 31. The projection of the outlet end of the second pipe section 31 and the outer peripheral wall of the first pipe section 21 on the plane at least partially overlaps. A rough part 50 is formed on the outer peripheral wall of the first pipe section 21. Along the axial direction of the second pipe section 31, the second pipe section 31 has a first projection on the first pipe section 21. At least part of the rough part 50 overlaps the first projection. Alternatively, along the axial direction of the first pipe section 21, at least part of the rough part 50 is located on the side of the first projection which is away from the first communication hole 12. The roughness of the rough part 50 is greater than the roughness of the remaining part of the first pipe section 21 which is not provided with the rough part 50.

[0030] Thus, the oil-gas mixed refrigerant enters the chamber 11 inside the cylinder 10 from the inlet pipe 30 and completes gas-liquid separation in the chamber 11. The gaseous refrigerant flows out through the outlet pipe 20 and the first communication hole 12. The axial direction of the second pipe section 31 is perpendicular to and intersects with the axial direction 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 oil-gas separation will occur, thereby improving the separation efficiency of the oil separator 100. In order to further improve the effect of oil-gas separation caused by collision, the rough part 50 is provided on the first pipe section 21. Since the roughness of the rough part 50 is greater, it can provide greater surface tension when colliding with the refrigerant. That is, the liquid refrigerant is more likely to adhere to the rough part 50 and is not easily taken away by the gaseous refrigerant. Therefore, the gas-liquid separation effect of the refrigerant is better.

[0031] It should be explained that the surface roughness refers to the unevenness of the smaller spacing and the tiny peaks and valleys on the machined surface of the first pipe section 21 and the rough part 50. In this embodiment, the outer peripheral wall of the first pipe section 21 is provided as a smooth curved surface, and the rough part 50 is provided on the outer peripheral wall of the first pipe section 21. The rough part 50 has a plurality of protruding or recessed structures, thereby forming a surface roughness which is greater than that of the outer peripheral wall of the first pipe section. Whether the rough part 50 is provided as the flow guide groove 51 structure or the network embossing structure below, it has a greater surface roughness.

[0032] The bottom of the cylinder 10 is provided with a third communication port 14, which is an oil outlet of the cylinder 10. After the refrigerant is separated from the oil, the lubricating oil can flow out of the third communication port 14.

[0033] Further, based on the position description of the rough part 50, the rough part 50 has multiple position setting modes. For example, the rough part 50 can be completely arranged in the first projection, and all the rough parts 50 coincide with the first projection; or the rough part 50 is completely arranged below the first projection (here, below refers to the direction away from the first communication hole 12), because the medium enters the chamber from the second pipe section 31 and then descends due to gravity, so the medium will inevitably collide with the rough part 50 after descending in a parabolic manner; similarly, the rough part 50 can also be arranged in the first projection and extend downward; or the rough part 50 extends from above the first projection (the side close to the first communication hole 12) to below the first projection. Preferably, in the present embodiment, the rough part 50 extends upward from the pipe opening of the first pipe section 21 to the upper side of the first projection.

[0034] The oil separator 100 further comprises an oil outlet pipe 40 connected to the bottom of the cylinder 10 and communicating with the chamber 11. After the refrigerant is separated from the oil, the liquid refrigerant flows to the bottom of the cylinder 10 due to gravity and then flows out of the oil separator 100 through the oil outlet pipe 40.

[0035] It should be explained that the first pipe section 21 and the second pipe section 31 are both parts completely inside the chamber 11, and the parts of the gas outlet pipe 20 and the gas inlet pipe 30 welded to the cylinder 10 do not belong to the first pipe section 21 and the second pipe section 31.

[0036] Preferably, the axis of the second pipe section 31 is perpendicular to and intersects with the axis of the first pipe section 21, so that the refrigerant completely impacts on the pipe wall of the gas outlet pipe 20, thereby improving the gas-liquid separation efficiency.

[0037] The rough part 50 has multiple embodiments, which are described in detail as follows:

[0038] Embodiment one

[0039] Please refer to Figs. 1-3The outer circumferential wall of the first pipe section 21 is provided with a plurality of flow guide grooves 51, which form the roughness 50. The flow guide grooves 51 are recessed inward in the radial direction of the first pipe section 21, extend along the axial direction of the first pipe section 21, and are arranged at intervals along the circumferential direction of the first pipe section 21. In this way, the oil droplets are aggregated on the outer wall of the first pipe section 21 under the action of the liquid surface tension during the collision process, and flow along the outer wall of the gas outlet pipe 20 under the action of gravity. The plurality of flow guide grooves 51 increase the surface roughness of the gas outlet pipe 20 and the capillary suction of the oil droplets, increase the surface tension of the oil droplets on the gas outlet pipe 20, and improve the aggregation of the oil droplets on the gas outlet pipe 20 during the collision process to improve the separation efficiency. In addition, the flow guide grooves 51 can also accommodate the refrigerant that has changed into a liquid state and guide the flow direction of the refrigerant through the groove walls of the flow guide grooves 51.

[0040] Preferably, in the present embodiment, the outer circumferential wall of the first pipe section 21 is provided with a plurality of flow guide grooves 51, which form the roughness 50. The flow guide grooves 51 extend along the axial direction of the first pipe section 21, and are arranged at intervals along the circumferential direction of the first pipe section 21. In this way, the plurality of flow guide grooves 51 can make the roughness 50 provide higher tension to the solidified liquid refrigerant, and the gas-liquid separation effect is better. Since the flow guide grooves 51 extend along the axial direction of the first pipe section 21, the flow guide grooves 51 can have a guiding effect on the liquid refrigerant, guiding the refrigerant to flow downward to the bottom of the cylinder body 10, reducing the refrigerant remaining on the pipe wall of the first pipe section 21.

[0041] Further, the adjacent flow guide grooves 51 are arranged in parallel, and the plurality of flow guide grooves 51 are uniformly arranged at intervals along the circumferential direction of the first pipe section 21. The adjacent two flow guide grooves 51 are arranged in parallel, thereby providing a more uniform flow guide effect of the refrigerant, and facilitating processing and assembly. During the assembly process, the gas outlet pipe 20 does not need to be rotated and adjusted, so that the roughness 50 provided thereon is always opposite to the gas inlet pipe 30.

[0042] In the radial direction of the first pipe section 21, the groove depth of the flow guide grooves 51 is h, and the wall thickness of the first pipe section 21 is H, which satisfies: h≤0.6H. In this way, it is prevented that the flow guide grooves 51 are too deep to affect the structural strength of the first pipe section 21. Exemplarily, h is set to 0.5H, 0.44H, etc., without being limited to the end point values mentioned above.

[0043] Further, along the circumferential direction of the first pipe section 21, the groove width of the flow guide grooves 51 is d, and the diameter of the first pipe section 21 is D, which satisfies: d≤0.25D. In this way, it is ensured that the flow guide grooves 51 can have sufficient flow guide effect and provide sufficient surface roughness, that is, to ensure the separation efficiency of the gas-liquid mixed refrigerant. Exemplarily, d is set to 0.21D, 0.17D, etc., without being limited to the end point values mentioned above.

[0044] Embodiment Two

[0045] Compared with Embodiment One, the rough part 50 in the present embodiment is also provided with a plurality of guide grooves 51, but the plurality of guide grooves 51 extend obliquely relative to the axis of the first pipe section 21 and cross communicate. In this way, a higher surface roughness can be provided, and when the refrigerant in a gas-liquid mixed state impacts on the rough part 50 of the present embodiment two, the gas-liquid separation effect is better.

[0046] Further, the plurality of guide grooves 51 extending obliquely in the same direction are arranged in parallel and uniformly spaced, and the plurality of guide grooves 51 extending obliquely in the other direction are arranged in parallel and uniformly spaced, so that the plurality of guide grooves 51 extending in different directions form a fishing net-like structure, and the plurality of guide grooves 51 communicate with each other, thereby allowing the refrigerant to flow along the opening direction of the guide grooves 51.

[0047] Embodiment Three

[0048] Compared with Embodiments One and Two, the rough part 50 in the present embodiment is provided in a net pattern embossing structure or a convex point structure to further enhance the surface roughness of the rough part 50, and the processing technology of the net pattern embossing structure is more simple and low in cost.

[0049] Embodiment Four

[0050] Compared with the above embodiments, the present embodiment is provided with a spiral groove on the outer peripheral wall of the first pipe section 21, and the spiral groove extends spirally from the pipe opening of the first pipe section 21 towards the direction of the first communication port. In this way, the spiral groove has a better guiding effect on the liquid refrigerant, and can prevent the liquid refrigerant from stagnating on the first pipe section 21.

[0051] In addition, the diameters of the first pipe section 21 and the second pipe section 31 are the same, and the axis of the second pipe section 31 intersects with the axis of the first pipe section 21. In this way, the medium entering from the second pipe section 31 can be completely impacted on the first pipe section 21, thereby further improving the gas-liquid separation efficiency.

[0052] The utility model also provides a refrigeration system, including oil separator 100 as above.

[0053] The utility model discloses a rough part 50 is arranged on the first pipe section 21 of the air outlet pipe 20 in the barrel 10, and the gas-liquid separation efficiency of the refrigerant in the gas-liquid mixed state impacting on the rough part 50 is improved by the rough part 50 with high roughness. The higher the roughness is, the higher the tension provided to the solidified liquid refrigerant is, and the better the gas-liquid separation effect is. Therefore, the oil separator 100 provided by the utility model has high separation efficiency and good separation effect.

[0054] Each of the technical features of the above-described embodiments can be combined arbitrarily, and for the sake of brevity, each of the technical features in the above-described embodiments is not described for all possible combinations, however, as long as the combinations of the technical features do not contradict, it should be considered as the scope of the description.

[0055] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the application patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the application patent should be subject to the appended claims.

Claims

1. An oil separator characterized by, The application relates to a cylinder (10) internally hollowed to form a chamber (11), one end of the cylinder (10) being provided with a first communication hole (12) along the axial direction of the cylinder (10); an air outlet pipe (20) with one end 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) with one end extending into the chamber (11) through a second communication hole (13) in 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) facing 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 axial direction 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; wherein a rough part (50) is arranged on the outer peripheral wall of the first pipe section (21), the second pipe section (31) having a first projection on the first pipe section (21) along the axial direction of the second pipe section (31); at least part of the rough part (50) overlaps the first projection; or, at least part of the rough part (50) is located on the side of the first projection away from the first communication hole (12) along the axial direction of the first pipe section (21); the roughness of the rough part (50) is greater than the roughness of the remaining part of the first pipe section (21) not provided with the rough part (50). The outer peripheral wall of the first pipe section (21) is provided with a plurality of guide grooves (51) formed by the outer peripheral wall of the first pipe section (21) in the direction of the radial direction inward, the plurality of guide grooves (51) form the rough part (50), the guide grooves (51) extend along the axial direction of the first pipe section (21), the plurality of guide grooves (51) are arranged at intervals along the circumferential direction of the first pipe section (21), and the adjacent two guide grooves (51) are arranged in parallel. Along the radial direction of the first pipe section (21), the groove depth of the guide groove (51) is h, and the wall thickness of the first pipe section (21) is H, and h<=0.6H is satisfied. Along the axial direction of the first pipe section (21), the guide groove (51) extends from the pipe opening of the first pipe section (21) to the side of the first projection close to the first communication hole (12). Along the radial direction of the first pipe section (21), the groove depth of the guide groove (51) is h, and the wall thickness of the first pipe section (21) is H, and h<=0.6H is satisfied. Along the circumferential direction of the first pipe section (21), the groove width of the guide groove (51) is d, and the diameter of the first pipe section (21) is D, and d<=0.3D is satisfied. ​ ​ ​ 2. The oil separator of claim 1, wherein ​ 3. The oil separator of claim 2, wherein ​ 4. The oil separator of claim 2, wherein ​ 5. The oil separator of claim 4, wherein ​ 6. The oil separator of claim 5, wherein ​ 7. The oil separator of claim 1, wherein A plurality of flow guide grooves (51) are formed on the outer peripheral wall of the first pipe section (21), the flow guide grooves (51) are formed by the outer peripheral wall of the first pipe section (21) being recessed in a radially inward direction, the plurality of flow guide grooves (51) form the roughness (50), and the plurality of flow guide grooves (51) extend obliquely with respect to the axis of the first pipe section (21) and cross-communicate.

8. The oil separator of claim 1, wherein The roughness (50) is provided as a net pattern or a convex point pattern.

9. The oil separator of claim 1, wherein A spiral groove is formed on the outer peripheral wall of the first pipe section (21), the spiral groove spirally extends from the pipe opening of the first pipe section (21) toward the first communication opening.

10. The oil separator according to any of claims 1-9, characterized in that The first pipe section (21) and the second pipe section (31) have the same diameter, and the axis of the second pipe section (31) intersects the axis of the first pipe section (21).

11. A refrigeration system characterized by, An oil separator comprising the first pipe section (21) according to any one of claims 1 to 9.

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