Oil separation device and refrigeration equipment thereof

Abstract

The utility model relates to an oil separation device and refrigeration equipment thereof. The oil separation device comprises a shell; the separation mechanism comprises a first pipeline and a first sealing plate, a first flow guide channel is formed in the side wall, close to the first outlet end, of the first pipeline, and the first sealing plate is arranged at the first outlet end; an oil-gas mixture enters the first pipeline through the first inlet end, is separated for the first time by the first sealing plate and then enters the first flow guide channel; the inner cylinder sleeves the outer side of the separation mechanism, a first separation channel is formed between the inner cylinder and the first pipeline, and a second separation channel is formed between the inner cylinder and the shell; a filter layer is arranged on the side wall of the inner cylinder and is used for carrying out secondary separation on the oil-gas mixture flowing out through the first flow guide channel; the cooling mechanism is arranged in the second separation channel; the oil-gas mixture flowing out of the filter layer flows through the cooling mechanism to be condensed into a liquid mixture, and the liquid mixture flows to the side wall of the inner cylinder in the second separation channel and is heated to complete third separation.

Description

Technical Field

[0001] This application relates to the field of vapor compression refrigeration technology, and in particular to an oil separation device and its refrigeration equipment. Background Technology

[0002] In the field of refrigeration compressor technology, refrigeration compressors using conventional oil-lubricated bearings rely on lubricating oil of a certain viscosity to ensure their efficient and stable operation. Lubricating oil lubricates moving parts, reducing friction and wear, lowering rotational friction power consumption, and helping to reduce the temperature of moving parts. Simultaneously, lubricating oil also enhances the internal sealing of the compressor, preventing refrigerant leakage. However, due to the certain miscibility between lubricating oil and refrigerant, a mixture of refrigerant and oil is formed when the refrigerant flows through the compressor. During this process, some lubricating oil is carried out of the compressor and enters other components of the refrigeration system along with the refrigerant.

[0003] For example, in a screw compressor refrigeration system, its working principle relies on the sealing of the gaps between the rotor and the housing, and between the rotors themselves. To ensure good lubrication and sealing, a certain amount of lubricating oil needs to be sprayed into the working chamber during compressor operation. However, this also results in the refrigerant vapor discharged from the compressor carrying a large amount of lubricating oil. Excessive lubricating oil entering the condenser and evaporator will severely affect their heat exchange efficiency, thereby reducing the efficiency of the entire refrigeration system. Utility Model Content

[0004] This application provides an oil separation device and its refrigeration equipment, which can effectively separate lubricating oil, prevent lubricating oil from being carried into the condenser and evaporator, affecting the heat exchange effect, and improving the overall efficiency of the refrigeration equipment.

[0005] In a first aspect, this application provides an oil separation device, comprising:

[0006] case;

[0007] The separation mechanism includes a first pipe and a first sealing plate. The first pipe has a first inlet end and a first outlet end, and a first flow guiding channel is provided on the side wall of the first pipe near the first outlet end. The first inlet end extends out of the housing, and the first sealing plate is provided at the first outlet end. The oil-gas mixture enters the first pipe through the first inlet end, undergoes a first separation by the first sealing plate, and then enters the first flow guiding channel.

[0008] An inner cylinder is disposed within the housing and sleeved on the outside of the separation mechanism. The inner cylinder and the first pipe form a first separation channel, and the inner cylinder and the housing form a second separation channel. A filter layer is provided on the side wall of the inner cylinder, and the filter layer is configured to perform a second separation on the oil-gas mixture flowing out through the first guide channel.

[0009] A cooling mechanism is disposed within the second separation channel and connected to the inner cylinder; wherein, the oil-gas mixture flowing out of the filter layer condenses into a liquid mixture through the cooling mechanism, and the liquid mixture flows to the side wall of the inner cylinder located within the second separation channel and exchanges heat with the inner cylinder to complete the third separation.

[0010] In one possible implementation, the first flow channel includes multiple airflow channels and multiple first oil channels. The multiple airflow channels are arranged sequentially along the circumference of the first pipe and penetrate the sidewall of the first pipe. The airflow channels are configured to transport the oil-gas mixture that has undergone the first separation.

[0011] Multiple first oil channels are located at the first outlet end of the first pipeline. The multiple first oil channels are arranged circumferentially along the first pipeline and penetrate the side wall of the first pipeline. The first oil channels are configured to transport lubricating oil that has undergone the first separation.

[0012] The airflow channel and the first oil channel are not connected.

[0013] In one possible implementation, a plurality of guide plates are provided on the circumferential outer wall of the first pipe, and the guide plates are disposed at the edge of the airflow channel;

[0014] The guide plate and the first pipe are at a preset angle.

[0015] In one possible implementation, a baffle is provided on the circumferential outer wall of the first pipe, the baffle being disposed on the side of the airflow channel near the first inlet end; wherein, the baffle and the inner cylinder have a first preset distance.

[0016] In one possible implementation, the first sealing plate includes a flat plate, a first ring plate, and a second ring plate. The flat plate is connected to the second ring plate through the first ring plate, and the second ring plate is provided with a plurality of first oil passage holes.

[0017] The first ring plate is inclined relative to the flat plate and the second ring plate, the flat plate is connected to the first outlet end of the first pipe to block the first outlet end, and the second ring plate is connected to the inner cylinder.

[0018] In one possible implementation, the inner cylinder includes a first cylinder and a second cylinder, the first cylinder and the second cylinder are connected, the first cylinder is connected to the first pipe, and the second cylinder is connected to the first sealing plate; wherein, the filter layer is provided on the side wall of the first cylinder.

[0019] In one possible implementation, the first cylinder includes a second sealing plate and a first annular cylinder, the second sealing plate being disposed on the side of the first annular cylinder away from the second cylinder to block the first separation channel, and the second sealing plate being connected to the first pipe.

[0020] In one possible implementation, the filter layer includes a filter screen body, and the first annular cylinder is provided with an clearance opening to accommodate the filter screen body.

[0021] In one possible implementation, the second cylinder includes a second annular cylinder and a supporting ring plate, wherein the second annular cylinder is connected to the first sealing plate;

[0022] The support ring plate is connected to the radial inner wall side of the second ring cylinder, and the support ring plate is used to support the first ring cylinder; wherein, there is a second preset distance between the support ring plate and the first pipe, and the support ring plate is provided with a plurality of second oil passage holes.

[0023] In one possible implementation, the diameter of the support ring plate is greater than or equal to the wall thickness of the first ring cylinder.

[0024] In one possible implementation, the cooling mechanism includes a spiral conduit wound around the radially outer side wall of the inner cylinder and correspondingly disposed with respect to the filter layer;

[0025] The spiral pipe has a second inlet end and a second outlet end, both of which extend out of the housing; wherein, the spiral pipe is configured to contain refrigerant.

[0026] In one possible implementation, an oil collecting tank is included, which is disposed within the second separation channel and is connected to both the housing and the inner cylinder.

[0027] In one possible implementation, the oil collection trough includes a first folded edge, a third ring plate, and a second folded edge connected in sequence. The third ring plate is inclined relative to the first folded edge and the second folded edge, respectively. The first folded edge is connected to the shell, and the second folded edge is connected to the inner cylinder.

[0028] The second folded edge is provided with multiple third oil passage holes.

[0029] In one possible implementation, the first folded edge is provided with a plurality of balancing holes.

[0030] In one possible implementation, the housing is provided with an oil outlet and an air outlet on both sides along its axial direction; wherein the air outlet is located on the same side as the first inlet end.

[0031] Secondly, this application provides a refrigeration device, including a device body and an oil separation device as described in the first aspect, wherein the oil separation device is connected to the device body.

[0032] Compared with the prior art, the above-mentioned technical solution provided in this application has the following advantages: the oil-gas mixture collides with the first pipe and the first sealing plate in the separation mechanism to complete the first separation. The oil-gas mixture flowing out of the first guide channel can collide with the first separation channel and flow towards the filter layer to complete the second separation. The oil-gas mixture passing through the filter layer washes the cooling mechanism, causing it to condense into a liquid mixture. The liquid mixture flows to the side wall of the inner cylinder located in the second separation channel. Since the oil-gas mixture flowing out of the first guide channel can collide with the first separation channel, the temperature of the side wall of the inner cylinder rises. The liquid mixture is heated to complete the third separation. The processes of collision, centrifugation, sedimentation, filtration and distillation are carried out, realizing the step-by-step separation of the oil-gas mixture. Large-diameter oil droplets, medium-diameter oil droplets, small-diameter oil droplets and micro-diameter oil droplets are separated in sequence, completing the deep separation of the oil-gas mixture and preventing it from entering the condenser or evaporator with the refrigerant, thereby improving the efficiency of the entire refrigeration equipment. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0036] Figure 1 This is a schematic diagram of the structure of an oil separation device provided in an embodiment of this application;

[0037] Figure 2 This is a cross-sectional schematic diagram of the oil separation device provided in the embodiments of this application;

[0038] Figure 3 This is a cross-sectional schematic diagram of the oil separation device provided in the embodiments of this application;

[0039] Figure 4 This is a schematic diagram of the separation mechanism provided in the embodiments of this application;

[0040] Figure 5 This is a schematic diagram of the structure of the first sealing plate provided in an embodiment of this application;

[0041] Figure 6 A schematic diagram of the structure of the first pipeline provided in an embodiment of this application;

[0042] Figure 7 This is a cross-sectional schematic diagram of the oil separation device provided in the embodiments of this application;

[0043] Figure 8 This is a schematic diagram of the structure of the second sealing plate provided in an embodiment of this application;

[0044] Figure 9 This is a schematic diagram of the structure of the second cylinder provided in an embodiment of this application;

[0045] Figure 10 This is a schematic diagram of the cooling mechanism provided in the embodiments of this application;

[0046] Figure 11 This is a schematic diagram of the structure of the oil collection tank provided in an embodiment of this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Shell; 11. Accommodation space; 12. Top cover; 13. Bottom cover; 14. Body; 15. Oil outlet; 16. Air outlet; 17. Air inlet; 18. Second separation channel; 19. Support; 2. Separation mechanism; 21. First pipe; 211. First inlet end; 212. First outlet end; 213. First guide channel; 2131. Airflow channel; 2132. First oil channel; 22. First sealing plate; 221. Flat plate; 222. First annular plate; 223. Second annular plate; 2231. First oil passage hole; 23. Guide plate; 24. Baffle; 3. Inner cylinder; 31. First separation channel; 32. Filter layer; 33. First cylinder body; 331. Second sealing plate; 3311. Plate body; 3312. Inner folded edge; 3313. Outer folded edge; 332. First ring cylinder; 34. Second cylinder body; 341. Second ring cylinder; 342. Support ring plate; 3421. Second oil passage hole; 4. Cooling mechanism; 41. Spiral pipe; 42. Second inlet end; 43. Second outlet end; 5. Oil collection tank; 51. First folded edge; 511. Balance hole; 52. Third ring plate; 53. Second folded edge; 531. Third oil passage hole. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0051] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0052] In related technologies, common oil separators mainly include centrifugal, washing, filter, and packing types. Their technical principles primarily utilize centrifugal force, inertial impaction, gravity sedimentation, and filtration techniques such as packing, filters, and molecular sieves to separate oil and gas. However, these technologies all have certain limitations in practical applications. For example, centrifugal force, inertial impaction, and gravity sedimentation all utilize the density difference between oil and gas for separation; therefore, they can only separate oil droplets with a diameter greater than 20 μm. The filter method relies on the change in flow direction, slowing down, capture, and accumulation of oil and gas as they pass through the filter screen, causing small oil droplets to gradually accumulate into larger droplets, which then flow down to the lower oil tank under gravity. This method can separate oil droplets with a medium diameter of 5-20 μm. Neither of the above two methods can effectively separate oil droplets with a diameter smaller than 5 μm. Currently, molecular sieves are effective in separating small-diameter oil droplets, but their poor permeability leads to very high pressure drop. If the pressure drop is reduced by increasing the area and decreasing the flow rate, the cost will increase significantly. Furthermore, molecular sieves are prone to clogging, have a short service life, and require regular replacement, resulting in high maintenance costs.

[0053] To address the aforementioned technical problems, this application provides an oil separation device. An oil-gas mixture collides with a first pipe and a first sealing plate in the separation mechanism, completing the first separation. The oil-gas mixture flowing out of the first guide channel impacts the first separation channel and flows towards the filter layer, completing the second separation. The oil-gas mixture passing through the filter layer washes over the cooling mechanism, causing it to condense into a liquid mixture. The liquid mixture flows to the side wall of the inner cylinder located in the second separation channel. Because the oil-gas mixture flowing out of the first guide channel impacts the first separation channel, the temperature of the side wall of the inner cylinder rises, and the liquid mixture undergoes a third separation. Through processes such as collision, centrifugation, sedimentation, filtration, and distillation, the oil-gas mixture is separated in stages, separating large-diameter oil droplets, medium-diameter oil droplets, small-diameter oil droplets, and micro-diameter oil droplets sequentially. This achieves deep separation of the oil-gas mixture, preventing it from entering the condenser or evaporator with the refrigerant and improving the efficiency of the entire refrigeration equipment.

[0054] In some exemplary embodiments, such as Figures 1-3 As shown, an oil separation device is suitable for use in refrigeration equipment to efficiently separate oil-gas mixtures and prevent lubricating oil from entering other critical components of the refrigeration equipment, such as the condenser and evaporator, thereby ensuring the overall performance and stability of the refrigeration equipment. The oil separation device includes a housing 1, a separation mechanism 2, an inner cylinder 3, and a cooling mechanism 4. The connections between the housing 1, the separation mechanism 2, the inner cylinder 3, and the cooling mechanism 4 are all welded to improve the reliability and stability of the connections between the components.

[0055] The housing 1 has an internal accommodating space 11 to accommodate the separation mechanism 2, the inner cylinder 3, and the cooling mechanism 4, ensuring a smooth appearance. For example, the housing 1 includes a body 14, an upper cover 12, and a lower cover 13. The body 14 is a hollow annular structure, and the upper cover 12 and lower cover 13 are both semi-circular, welded to the body 14 to seal the accommodating space 11 and improve the structural stability of the housing 1.

[0056] The housing 1 is provided with at least an oil outlet 15, an air outlet 16, and an air inlet 17. The oil outlet 15 and air outlet 16 are respectively provided on both sides of the housing 1 along its axial direction. The air inlet 17 is used to receive the oil-air mixture. The air inlet 17 is, for example, located on the upper cover 12. When the oil-air mixture is introduced, it has a certain pressure and impact force, allowing it to move downwards. The air outlets 16 are, for example, all located on the upper cover 12. The separated refrigerant flows upwards and is discharged through the air outlets 16. The oil outlet 15 is used to discharge the separated lubricating oil. The oil outlet 15 is, for example, provided with a lower cover 13 for centralized collection.

[0057] It should be noted that auxiliary components are also provided on the outer side of the housing 1 to ensure its stability. The housing 1 can be bolted to the unit support or base, directly welded to the support or base, or bolted or screwed to a pre-set foundation on the ground. For example, a support 19 is provided at the lower end of the housing 1. The support 19 supports the housing 1, providing balance and stability to prevent it from swaying. The support 19 raises the overall height of the housing 1, avoiding the oil outlet 15, facilitating the discharge and collection of lubricating oil.

[0058] In this embodiment, as Figures 2-6 As shown, the separation mechanism 2 includes a first pipe 21 and a first sealing plate 22. The first pipe 21 has a first inlet end 211 and a first outlet end 212. The first inlet end 211 is connected to, for example, an air inlet 17 and extends out of the housing 1. The first inlet end 211 is used to introduce an oil-gas mixture. Near the first outlet end 212, a first guide channel 213 is provided on the side wall of the first pipe 21, and the first sealing plate 22 is disposed at the first outlet end 212. The high-temperature and high-pressure oil-gas mixture discharged from the compressor enters the first pipe 21 through the first inlet end 211 and impacts the first sealing plate 22 at high speed along the axial direction of the first pipe 21. The first impact separation, i.e., the first separation, is achieved through the first sealing plate 22. At this time, large-diameter oil droplets and some medium-diameter oil droplets are separated. Large-diameter oil droplets and some medium-diameter oil droplets separated by impact enter the first guide channel 213 to facilitate subsequent collection of lubricating oil. The oil-gas mixture that has not yet been separated is redirected after impacting the first sealing plate 22 to flow into the first guide channel 213 for subsequent second separation.

[0059] In this embodiment, as Figures 2-7 As shown, the inner cylinder 3 is disposed within the accommodating space 11 of the shell 1. The inner cylinder 3 has a hollow structure and is sleeved on the outside of the separation mechanism 2. There is a certain distance between the inner cylinder 3 and the first pipe 21 to form the first separation channel 31. After the oil-gas mixture in the first pipe 21 vertically impacts the first sealing plate 22, the oil-gas mixture that has not been separated will turn and flow along the first guide channel 213. The first guide channel 213 is connected to the first separation channel 31, and the oil-gas mixture enters the first separation channel 31 and flows upward. When the oil-gas mixture enters the first separation channel 31, it will impact the inner wall of the inner cylinder 3, which can also achieve some separation effect.

[0060] The inner cylinder 3 has a filter layer 32 on its side wall. The oil-gas mixture in the first separation channel 31 flows upward to the filter layer 32, where it undergoes a second separation. At this point, medium-sized oil droplets and some small-sized oil droplets are separated. The inner cylinder 3 and the shell 1 form a second separation channel 18, into which the unseparated oil-gas mixture enters for a subsequent third separation.

[0061] In this embodiment, as Figures 2-10 As shown, the cooling mechanism 4 is located within the second separation channel 18 and connected to the inner cylinder 3 to enhance its stability. The oil-gas mixture flowing out of the filter layer 32 flows to the cooling mechanism 4, scouring it. Part of the gaseous refrigerant condenses into liquid refrigerant, and small-diameter oil droplets dissolve in the liquid refrigerant, forming a liquid mixture. Under gravity, this liquid mixture drips down onto the side wall of the inner cylinder 3. As the oil-gas mixture enters the first separation channel 31, it impacts the inner wall of the inner cylinder 3, creating a hot wall surface. The liquid mixture exchanges heat with the hot wall surface of the inner cylinder 3. Due to the different boiling points of oil and refrigerant, the liquid refrigerant evaporates upon heating, while the lubricating oil does not, leaving the lubricating oil behind, thus achieving a third separation. At this point, tiny oil droplets are separated. The separated lubricating oil is discharged through the oil outlet 15, and the separated refrigerant gas is discharged through the gas outlet 16.

[0062] The oil separation device in this embodiment effectively improves the separation efficiency of the oil-gas mixture through a multi-stage separation and cooling mechanism, ensuring that the refrigerant gas is discharged sufficiently pure for use by the condenser and evaporator, thus ensuring the stable operation of the refrigeration equipment.

[0063] In some exemplary embodiments, such as Figures 2-6 As shown, the first flow channel 213 includes multiple airflow channels 2131 and multiple first oil channels 2132. The multiple airflow channels 2131 are arranged sequentially along the circumference of the first pipe 21. The airflow channels 2131 are configured to transport the oil-gas mixture after the first separation. The airflow channels 2131 are, for example, rectangular and penetrate the side wall of the first pipe 21. This not only ensures that the oil-gas mixture can smoothly pass through the airflow channels 2131 after the first separation to continue its subsequent separation or processing, but also provides sufficient flow space, has hydrodynamic properties and mechanical strength, reduces flow resistance, and improves separation efficiency.

[0064] Multiple first oil channels 2132 are located at the first outlet end 212 of the first pipe 21. These channels are arranged circumferentially along the first pipe 21 and are configured to transport the lubricating oil after the first separation. Each first oil channel 2132 has an edge notch at the first outlet end 212 and penetrates the sidewall of the first pipe 21. The lubricating oil slides down the interior of the first pipe 21 and then flows along the first oil channel 2132. The airflow channel 2131 and the first oil channels 2132 are not connected to avoid mutual interference, ensuring the stability and reliability of the separation process and reducing the risk of separation failure due to poor flow or re-carrying of the oil-gas mixture.

[0065] By rationally arranging the airflow channel 2131 and the first oil channel 2132, the oil-gas mixture is efficiently separated. The lubricating oil can quickly slide down and be discharged through the first oil channel 2132, while the oil-gas mixture continues to flow through the airflow channel 2131, reducing energy loss and time consumption during the separation process.

[0066] In this embodiment, as Figures 2-6 As shown, multiple guide plates 23 are provided on the circumferential outer wall of the first pipe 21, and the guide plates 23 are located at the edge of the airflow channel 2131. The guide plates 23 are at a predetermined angle to the first pipe 21. For example, the first pipe 21 has multiple linear elements, one of which connects to the guide plate 23. This linear element and the guide plate 23 have a predetermined angle α, such as 30°-60°, used to guide the oil-gas mixture within the airflow channel 2131 along the guide plate 23. This allows the oil-gas mixture to impact the inner wall of the inner cylinder 3 at a certain angle, generating a rotating flow along the inner wall of the inner cylinder 3, completing further impact and centrifugation, and fully separating large-diameter oil droplets. Simultaneously, the introduction of the guide plates 23 not only changes the flow direction of the oil-gas mixture but also optimizes the flow field distribution, making the flow within the inner cylinder 3 more uniform, reducing the generation of eddies and dead zones, and further improving the separation effect.

[0067] Since the guide vanes 23 can guide the oil-gas mixture to flow in a stable manner, they also help to enhance the stability of the entire oil-gas separation unit and reduce the risk of separation failure or equipment damage caused by unstable flow.

[0068] In this embodiment, as Figures 2-6As shown, a baffle 24 is provided on the circumferential outer wall of the first pipe 21. The baffle 24 is located on the side of the airflow channel 2131 near the first inlet end 211. That is, when the oil-gas mixture flows out of the airflow channel 2131 and flows upward, the baffle 24 will obstruct the further flow of the oil-gas mixture and reduce the flow rate. By slowing down the flow rate of the oil-gas mixture, the baffle 24 allows the oil-gas mixture more sufficient mixing and preparation time before entering the filter layer 32 of the first separation channel 31, which helps to more effectively separate oil droplets in the subsequent separation process, thereby improving the overall separation efficiency.

[0069] The baffle 24 and the inner cylinder 3 have a first preset distance to ensure the unobstructed flow of the first separation channel 31 and avoid flow blockage caused by too small a distance. After the oil-gas mixture is decelerated by the baffle 24, the buoyancy decreases, and the large-diameter oil droplets and some medium-diameter oil droplets entrained in the oil-gas mixture further settle and separate under the action of gravity. The settled oil-gas mixture contains medium-diameter and small-diameter oil droplets and flows to the upper part of the first separation channel 31, flowing to the filter layer 32 at a lower flow rate.

[0070] The introduction of baffle 24 not only changes the flow velocity of the oil-gas mixture, but also has a certain impact on its flow direction, which helps to optimize the flow field distribution and make the flow of the oil-gas mixture in the first separation channel 31 more uniform and stable.

[0071] Since the baffle 24 can effectively slow down the flow rate of the oil-gas mixture, it also helps to reduce equipment vibration and noise problems caused by excessive flow rate, enhances the stability of the entire oil-gas separation device, and extends its service life.

[0072] The first preset distance between the baffle 24 and the inner cylinder 3 can be adjusted according to actual needs, so that the oil-gas separation device can adapt to the processing needs of oil-gas mixtures with different flow rates and pressures, thus improving its versatility and flexibility.

[0073] In this embodiment, as Figures 2-6 As shown, the first sealing plate 22 includes a flat plate 221, a first annular plate 222, and a second annular plate 223. The flat plate 221 is connected to the second annular plate 223 via the first annular plate 222. The first annular plate 222 is inclined relative to both the flat plate 221 and the second annular plate 223, meaning it has an inclined annular surface. Lubricating oil flowing from the first oil channel 2132 can flow smoothly along the inclined annular surface of the first annular plate 222, thereby accumulating lubricating oil and preventing its dispersion and loss. This allows for subsequent centralized collection, improving the lubricating oil collection efficiency.

[0074] The plate 221 is connected to the first outlet end 212 of the first pipeline 21 to block the first outlet end 212, so as to ensure that the oil and gas mixture entering the first pipeline 21 can collide with the plate 221 and promote oil and gas separation.

[0075] The second annular plate 223 is connected to the inner cylinder 3 to seal the inner cylinder 3, ensuring that lubricating oil can further accumulate above the second annular plate 223. The second annular plate 223 is provided with multiple first oil passage holes 2231, which communicate with the accommodating space 11 of the housing 1, allowing lubricating oil to flow along the first oil passage holes 2231 into the accommodating space 11 of the housing 1. The lower cover 13 of the housing 1 is semi-circular, and the oil outlet 15 is located on the central axis of the lower cover 13. After flowing into the accommodating space 11, the lubricating oil accumulates along the semi-circular shape of the lower cover 13, simplifying the lubricating oil collection process and reducing operational difficulty. When the accumulated amount reaches a certain level, it can be easily collected by opening the oil outlet 15, improving work efficiency.

[0076] In some exemplary embodiments, such as Figures 2-9 As shown, the inner cylinder 3 includes a first cylinder 33 and a second cylinder 34, which are tightly connected along the axial direction to form a whole. The first cylinder 33 is connected to the first pipe 21, and the second cylinder 34 is connected to the first sealing plate 22. One end of the first cylinder 33 is connected to the first pipe 21, ensuring that the oil-gas mixture can smoothly enter the inner cylinder 3 (i.e., the first separation channel 31) for processing. The space formed between the first cylinder 33 and the first pipe 21, and the space formed between the second cylinder 34 and the first pipe 21 together constitute the first separation channel 31. The other end of the second cylinder 34 is connected to the first sealing plate 22, which serves to seal and guide the flow.

[0077] A filter layer 32 is provided on the side wall of the first cylinder 33. The oil and gas mixture coming out of the airflow channel 2131 impacts the second cylinder 34 and then flows onto the filter layer 32 of the first cylinder 33.

[0078] In this embodiment, as Figures 2-9 As shown, the first cylinder 33 includes a second sealing plate 331 and a first annular cylinder 332. The first annular cylinder 332 is the carrier of the filter layer 32. Exemplarily, the first annular cylinder 332 is provided with an avoidance opening, and the filter layer 32 includes a filter screen body. The filter screen body is embedded in the avoidance opening, which can be easily assembled and disassembled, greatly facilitating subsequent cleaning or replacement work.

[0079] Alternatively, the filter layer 32 can be integrally formed with the first annular cylinder 332, which not only avoids the risk of the filter layer 32 falling off due to impact, but also improves the overall structural strength. For example, the filter screen body is woven from a cylindrical stainless steel wire mesh of a certain thickness. The filter screen body has multiple pores, and the oil droplets filtered inside the filter screen body will accumulate and fall onto the second cylinder 34.

[0080] Medium-sized oil droplets and some small-sized oil droplets in the oil-gas mixture are captured in the filter screen and gradually accumulate into large-sized oil droplets. The large-sized oil droplets flow downward under the action of gravity and eventually flow to the second cylinder 34, realizing the second separation of the oil-gas mixture.

[0081] The second sealing plate 331 is disposed on the side of the first annular cylinder 332 away from the second cylinder 34 to block one end of the first separation channel 31. The second sealing plate 331 is connected to the first pipe 21 to facilitate the stability of the inner cylinder 3. The second sealing plate 331 may be welded to the first pipe 21 to improve the reliability of the connection.

[0082] For example, the second sealing plate 331 includes a plate body 3311, an inner folded edge 3312 and an outer folded edge 3313. The plate body 3311 is annular. The inner folded edge 3312 is connected to the inner ring of the plate body 3311, and the outer folded edge 3313 is connected to the outer ring of the plate body 3311. The second sealing plate 331 is sleeved on the first pipe 21.

[0083] The inner folded edge 3312 can be connected to the outer wall of the first pipe 21. The inner folded edge 3312 can increase the connection area between the second sealing plate 331 and the first pipe 21, thereby improving the reliability of the connection.

[0084] The outer folded edge 3313 is fitted onto one end of the second cylinder 34, which not only serves as a positioning and connection to prevent gaps from forming between the second cylinder 34 and the second sealing plate 331 due to misalignment, thus affecting the sealing performance, but also further increases the connection area with the second sealing plate 331, ensuring the stability of the second cylinder 34.

[0085] By combining the filter layer 32 and the first separation channel 31, this embodiment can efficiently capture oil droplets in the oil-gas mixture, achieve effective separation of the oil-gas mixture, and improve separation processing efficiency.

[0086] In this embodiment, as Figures 2-9As shown, the second cylinder 34 includes a second annular cylinder 341 and a supporting ring plate 342. The second annular cylinder 341 is connected to the first sealing plate 22 by welding, which is not only stable and reliable, but also effectively prevents leakage of the oil-gas mixture and ensures the sealing performance of the oil-gas separation device. Furthermore, the space formed by the second annular cylinder 341, the first sealing plate 22, and the first pipe 21 is equivalent to an oil collection space, used to collect the lubricating oil separated from the filter layer 32, facilitating subsequent recycling.

[0087] The support ring plate 342 is connected to the radial inner wall of the second ring cylinder 341, and the support ring plate 342 is used to support the first ring cylinder 332. Oil droplets separated from the filter layer 32 can flow onto the support ring plate 342 by gravity, achieving accumulation. The ring diameter of the support ring plate 342 is greater than or equal to the wall thickness of the first ring cylinder 332, ensuring that all oil droplets in the filter layer 32 can flow onto the support ring plate 342 for collection.

[0088] Furthermore, the design of the support ring plate 342 also considers the accumulation and discharge of oil droplets, ensuring that the oil droplets separated from the filter layer 32 can flow smoothly onto the support ring plate 342 for effective collection. Multiple second oil passage holes 3421 are provided on the support ring plate 342, allowing lubricating oil droplets on the support ring plate 342 to fall onto the second ring plate 223 of the first sealing plate 22, and then enter the housing 1 through the first oil passage holes 2231 in the second ring plate 223 for centralized collection and treatment. This design not only simplifies the oil droplet collection process but also improves the overall cleanliness of the equipment.

[0089] A second preset distance is provided between the support ring plate 342 and the first pipe 21 to ensure the unobstructed flow of the first separation channel 31. The support ring plate 342 is located above the baffle 24 and is connected to the second cylinder 34. The baffle 24 is connected to the first pipe 21, so that the baffle 24 and the support ring plate 342 are located on opposite sides and staggered vertically. This design constructs the first separation channel 31 into a 'Z'-shaped channel. When the oil-gas mixture passes through, it is obstructed by both the baffle 24 and the support ring plate 342, achieving effects such as impacting the inner wall, centrifugal rotation, and slowing the flow rate, thus more effectively separating oil droplets.

[0090] This embodiment significantly improves the oil-gas separation efficiency and overall performance of the oil-gas separator by optimizing the structural design of the second cylinder 34, while also enhancing the stability and ease of maintenance of the oil-gas separator. Furthermore, through the support ring plate 342 and baffle 24, and their relative positions to the first pipe 21 and the second cylinder 34, this embodiment successfully constructs a highly efficient 'Z'-shaped first separation channel 31. This design enables more effective oil droplet separation when the oil-gas mixture passes through it.

[0091] In some exemplary embodiments, such as Figures 2-10 As shown, the cooling mechanism 4 includes a spiral pipe 41, which is wound around the radial outer wall of the inner cylinder 3, for example, around the first cylinder 33 of the inner cylinder 3, so as to be correspondingly arranged with the filter layer 32 and to receive the oil-gas mixture that flows out of the filter layer 32 but has not been separated.

[0092] The spiral pipe 41 has a second inlet end 42 and a second outlet end 43, both of which extend out of the housing 1 to facilitate communication with external equipment. The external equipment, for example, is connected to the second inlet end 42 and the second outlet end 43 respectively, thereby achieving the circulation of the refrigerant. The spiral pipe is configured to contain the refrigerant, facilitating the condensation of gaseous refrigerant in the oil-gas mixture into liquid refrigerant.

[0093] After the oil-gas mixture is filtered and separated by the filter layer 32, it still contains a small amount of small-diameter or micro-diameter oil droplets, which are difficult to remove effectively in conventional separation processes. In this embodiment, the low-temperature medium (i.e., refrigerant) in the spiral pipe 41 plays a crucial role. Since the wall temperature of the spiral pipe 41 is set lower than the condensation temperature of the gaseous refrigerant in the oil-gas mixture, when the oil-gas mixture flows through the spiral pipe 41, some of the gaseous refrigerant condenses into liquid refrigerant, forming columns of condensate in the circumferential direction of the spiral pipe 41, resembling a rain curtain. These liquid columns maintain a certain interval. When the oil-gas mixture passes through these liquid rain curtains, due to the miscibility between oil and liquid refrigerant, the small-diameter and micro-diameter oil droplets that are difficult to separate dissolve in the condensate, forming a liquid mixture that drips downwards together.

[0094] These liquid mixtures flow into the second cylinder 34 of the inner cylinder 3, where they undergo a third separation due to heating. During this process, the high-temperature, high-pressure oil-gas mixture exiting the gas flow channel 2131 impacts the second cylinder 34, causing its temperature to rise and forming a hot wall. Because the boiling points of the lubricating oil and the liquid refrigerant are different, when the liquid mixture encounters this hot wall, the liquid refrigerant evaporates upon heating, while the lubricating oil does not. Therefore, the lubricating oil is successfully retained, while small-diameter oil droplets and micro-diameter oil droplets achieve deep separation through the combination and evaporation process with the liquid refrigerant, thus completing the third separation.

[0095] This embodiment achieves deep separation of small-diameter and micro-diameter oil droplets through the design of the spiral pipe 41 of the cooling mechanism 4. This separation method not only improves the separation efficiency of the oil-gas separator but also ensures cleaner exhaust gas. Furthermore, the heat exchange process between the spiral pipe 41 and the second cylinder 34 of the inner cylinder 3 is cleverly utilized, achieving both the condensation and volatilization of the refrigerant and the utilization of the thermal energy of the high-temperature, high-pressure oil-gas mixture. This design not only improves energy efficiency but also reduces equipment operating costs.

[0096] In this embodiment, as Figures 2-11 As shown, the oil separation device includes an oil collection tank 5, which is disposed within the second separation channel 18. The oil collection tank 5 is tightly connected to both the housing 1 and the inner cylinder 3. The oil collection tank 5 is used to collect the lubricating oil separated in the third separation.

[0097] For example, the oil collecting tank 5 includes a first flange 51, a third ring plate 52, and a second flange 53 connected in sequence. The first flange 51 is connected to the housing 1, and the second flange 53 is connected to the second cylinder 34 of the inner cylinder 3. The third ring plate 52 is inclined relative to the first flange 51 and the second flange 53, which not only effectively reduces the volume of the oil collecting tank 5, making the entire device more compact and facilitating the collection of lubricating oil, but also ensures that the liquid mixture in the oil collecting tank 5 can adhere tightly to the second cylinder 34 of the inner cylinder 3. In this way, when the second cylinder 34 acts as a hot wall to heat the liquid mixture in the oil collecting tank 5, the liquid refrigerant can evaporate more quickly, leaving behind pure lubricating oil.

[0098] The second folded edge 53 is provided with multiple third oil passage holes 531, which are connected to the housing 1, so that the lubricating oil in the oil collection tank 5 can flow to the lower cover 13 of the housing 1 and then be discharged from the oil outlet 15, which simplifies the lubricating oil collection process and improves the separation efficiency of the whole device.

[0099] In addition, to prevent the lubricating oil from not flowing smoothly into the housing 1 due to excessive pressure in the oil collection tank 5, the first folded edge 51 is also provided with multiple balance holes 511. The balance holes 511 can make the upper and lower spaces of the oil collection tank 5 have the same pressure, thereby ensuring that the lubricating oil can drip smoothly into the housing 1 under the action of gravity. This not only improves the stability and reliability of the device, but also further simplifies the maintenance process.

[0100] This embodiment, through optimized structural design of the oil collection tank 5, successfully improves the separation efficiency of the oil-gas separator, simplifies the collection process, enhances stability, and optimizes the structural design. Furthermore, the oil collection tank 5 allows the liquid mixture to be heated more quickly by the hot wall surface, thereby achieving rapid evaporation of the liquid refrigerant and separation of the lubricating oil. The design of the third oil passage hole 531 on the second folded edge 53 allows the lubricating oil to flow smoothly to the lower cover 13 of the housing 1 and finally be discharged through the oil outlet 15, simplifying the collection process and improving the automation level of the entire device. The balance hole 511 on the first folded edge 51 effectively prevents problems caused by excessive pressure within the oil collection tank 5, ensuring smooth discharge of the lubricating oil, improving the stability of the device, and reducing the failure rate.

[0101] This application also provides a refrigeration device with high-efficiency refrigeration performance. The refrigeration device includes an evaporator, a condenser, a device body, and an oil separation device as described in any of the above embodiments, the oil separation device being connected to the device body. The oil separation device ensures efficient separation and recovery of lubricating oil, thereby improving the stability and efficiency of the entire refrigeration system.

[0102] The main body of the equipment serves as the core structure of the refrigeration system, housing key components such as the evaporator, condenser, and oil separator. Its design fully considers the operational requirements of the refrigeration system, ensuring close cooperation and efficient coordination among all components.

[0103] During the operation of refrigeration equipment, the refrigerant absorbs heat and transforms into a gaseous state in the evaporator. After being compressed by the compressor, it enters the oil separator. In the oil separator, the lubricating oil and refrigerant are efficiently separated. The lubricating oil is recovered and reinjected into the compressor, while the refrigerant continues to enter the condenser for condensation. The condensed refrigerant then re-enters the evaporator for evaporation, thus forming a complete refrigeration cycle.

[0104] By optimizing the design of the oil separation device, the refrigeration equipment in this embodiment achieves efficient separation and recovery of lubricating oil, thereby reducing the lubricating oil content in the compressor and improving the purity of the refrigerant. This helps reduce compressor energy consumption and wear, thus improving the overall refrigeration efficiency of the refrigeration equipment.

[0105] The efficient oil separator ensures a sufficient supply of lubricating oil in the compressor, thus preventing compressor failure due to insufficient lubrication. This helps extend the compressor's lifespan and improves the stability of the entire refrigeration system.

[0106] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0107] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0108] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An oil separation device, characterized in that, include: case; The separation mechanism includes a first pipe and a first sealing plate. The first pipe has a first inlet end and a first outlet end, and a first flow guiding channel is provided on the side wall of the first pipe near the first outlet end. The first inlet end extends out of the housing, and the first sealing plate is provided at the first outlet end. The oil-gas mixture enters the first pipe through the first inlet end, undergoes a first separation by the first sealing plate, and then enters the first flow guiding channel. An inner cylinder is disposed within the housing and sleeved on the outside of the separation mechanism. The inner cylinder and the first pipe form a first separation channel, and the inner cylinder and the housing form a second separation channel. A filter layer is provided on the side wall of the inner cylinder, and the filter layer is configured to perform a second separation on the oil-gas mixture flowing out through the first guide channel. A cooling mechanism is disposed within the second separation channel and connected to the inner cylinder; wherein, the oil-gas mixture flowing out of the filter layer flows through the cooling mechanism and condenses into a liquid mixture, the liquid mixture flows to the side wall of the inner cylinder located within the second separation channel, and is heated to complete the third separation.

2. The oil separation device according to claim 1, characterized in that, The first flow channel includes multiple airflow channels and multiple first oil channels. The multiple airflow channels are arranged sequentially along the circumference of the first pipe and penetrate the side wall of the first pipe. The airflow channels are configured to transport the oil-gas mixture that has undergone the first separation. Multiple first oil channels are located at the first outlet end of the first pipeline. The multiple first oil channels are arranged circumferentially along the first pipeline and penetrate the side wall of the first pipeline. The first oil channels are configured to transport lubricating oil that has undergone the first separation. The airflow channel and the first oil channel are not connected.

3. The oil separation device according to claim 2, characterized in that, The outer circumferential wall of the first pipe is provided with a plurality of guide plates, which are located at the edge of the airflow channel; The guide plate and the first pipe are at a preset angle.

4. The oil separation device according to claim 2, characterized in that, A baffle is provided on the outer circumferential wall of the first pipe, and the baffle is located on the side of the airflow channel near the first inlet end; wherein, there is a first preset distance between the baffle and the inner cylinder.

5. The oil separation device according to claim 1, characterized in that, The first sealing plate includes a flat plate, a first ring plate, and a second ring plate. The flat plate is connected to the second ring plate through the first ring plate, and the second ring plate is provided with a plurality of first oil passage holes. The first ring plate is inclined relative to the flat plate and the second ring plate, the flat plate is connected to the first outlet end of the first pipe to block the first outlet end, and the second ring plate is connected to the inner cylinder.

6. The oil separation device according to claim 1, characterized in that, The inner cylinder includes a first cylinder and a second cylinder, the first cylinder and the second cylinder are connected, the first cylinder is connected to the first pipe, and the second cylinder is connected to the first sealing plate; wherein, the filter layer is provided on the side wall of the first cylinder.

7. The oil separation device according to claim 6, characterized in that, The first cylinder includes a second sealing plate and a first annular cylinder. The second sealing plate is disposed on the side of the first annular cylinder away from the second cylinder to block the first separation channel. The second sealing plate is connected to the first pipe.

8. The oil separation device according to claim 7, characterized in that, The filter layer includes a filter screen, and the first annular cylinder is provided with an avoidance opening to embed the filter screen.

9. The oil separation device according to claim 7, characterized in that, The second cylinder includes a second annular cylinder and a supporting ring plate, wherein the second annular cylinder is connected to the first sealing plate; The support ring plate is connected to the radial inner wall side of the second ring cylinder, and the support ring plate is used to support the first ring cylinder; wherein, there is a second preset distance between the support ring plate and the first pipe, and the support ring plate is provided with a plurality of second oil passage holes.

10. The oil separation device according to claim 9, characterized in that, The diameter of the support ring plate is greater than or equal to the wall thickness of the first ring cylinder.

11. The oil separation device according to claim 1, characterized in that, The cooling mechanism includes a spiral pipe that is wound around the radial outer wall of the inner cylinder and is correspondingly arranged with respect to the filter layer. The spiral pipe has a second inlet end and a second outlet end, both of which extend out of the housing; wherein, the spiral pipe is configured to contain refrigerant.

12. The oil separation device according to claim 1, characterized in that, It includes an oil collection tank, which is disposed within the second separation channel and is connected to the shell and the inner cylinder respectively.

13. The oil separation device according to claim 12, characterized in that, The oil collection trough includes a first folded edge, a third ring plate, and a second folded edge connected in sequence. The third ring plate is inclined relative to the first folded edge and the second folded edge, respectively. The first folded edge is connected to the shell, and the second folded edge is connected to the inner cylinder. The second folded edge is provided with multiple third oil passage holes.

14. The oil separation device according to claim 13, characterized in that, The first folded edge is provided with multiple balancing holes.

15. The oil separation device according to claim 1, characterized in that, The housing is provided with an oil outlet and an air outlet on both sides along its axial direction; wherein the air outlet is located on the same side as the first inlet end.

16. A refrigeration device, characterized in that, It includes a device body and an oil separation device as described in any one of claims 1-15, wherein the oil separation device is connected to the device body.

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