Oil separation device and refrigeration equipment thereof

Abstract

The invention 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] The present application relates to the technical field of vapor compression refrigeration, and in particular to an oil separation device and a refrigeration device thereof. Background Art

[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 can lubricate moving parts to reduce friction and wear, reduce rotational friction power consumption, and help reduce the temperature of moving parts. At the same time, lubricating oil also strengthens the sealing effect inside the compressor to prevent refrigerant leakage. However, due to the certain mutual solubility between lubricating oil and refrigerant, when the refrigerant flows through the compressor, a mixture of refrigerant and oil is formed. In this process, part of the lubricating oil will be taken out of the compressor and enter other parts of the refrigeration system along with the refrigerant.

[0003] For example, in the refrigeration system of a screw compressor, its working principle relies on the gap sealing between the rotor and the shell, and between the rotors. In order to ensure good lubrication and sealing effects, a certain amount of lubricating oil needs to be sprayed into the working chamber during the operation of the compressor. However, this also results in a large amount of lubricating oil being carried in the refrigerant vapor discharged from the compressor. Too much lubricating oil entering the condenser and evaporator will seriously affect their heat exchange effect, thereby reducing the efficiency of the entire refrigeration system. Summary of the invention

[0004] The present application provides an oil separation device and a refrigeration device thereof, which can realize effective separation of lubricating oil, prevent lubricating oil from being brought into the condenser and evaporator, affect the heat exchange effect, and improve the efficiency of the entire refrigeration equipment.

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

[0006] case;

[0007] The separation mechanism comprises a first pipeline and a first sealing plate, wherein the first pipeline has a first inlet end and a first outlet end, and a first guide channel is arranged on a side wall of the first pipeline near the first outlet end, the first inlet end passes through the shell, and the first sealing plate is arranged at the first outlet end; wherein the 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 guide channel;

[0008] an inner cylinder, arranged in the shell and sleeved on the outer side of the separation mechanism, wherein 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; wherein 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; and

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

[0010] In a possible implementation, the first flow guide channel includes a plurality of air flow channels and a plurality of first oil channels, the plurality of air flow channels are sequentially arranged along the circumference of the first pipeline and penetrate the side wall of the first pipeline, and the air flow channels are configured to transport the oil-gas mixture that has undergone the first separation;

[0011] A plurality of the first oil channels are located at the first outlet end of the first pipeline, the plurality of the first oil channels are arranged along the circumference of the first pipeline and penetrate the side wall of the first pipeline, and the first oil channels are configured to transport the lubricating oil that has undergone the first separation;

[0012] Wherein, the air flow channel and the first oil channel are not connected.

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

[0014] Wherein, a preset angle is formed between the guide plate and the first pipe.

[0015] In a possible implementation, a baffle is provided on the circumferential outer side wall of the first pipe, and the baffle is provided on a side of the air flow channel close to the first inlet end; wherein a first preset distance is provided between the baffle and the inner tube.

[0016] In a 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 holes;

[0017] The first ring plate is tilted relative to the flat plate and the second ring plate, the flat plate is connected to the first outlet end of the first pipeline to block the first outlet end, and the second ring plate is connected to the inner tube.

[0018] In a 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 pipeline, 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 a possible implementation, the first cylinder includes a second sealing plate and a first annular cylinder, the second sealing plate is disposed on a side of the first annular cylinder away from the second cylinder to seal the first separation channel, and the second sealing plate is connected to the first pipeline.

[0020] In a possible implementation, the filter layer includes a filter mesh body, and the first ring cylinder is provided with an avoidance opening to embed the filter mesh body.

[0021] In a possible implementation, the second cylinder includes a second annular cylinder and a supporting annular plate, and 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 tube, and the support ring plate is used to support the first ring tube; wherein, there is a second preset distance between the support ring plate and the first pipeline, and a plurality of second oil holes are arranged on the support ring plate.

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

[0024] In a possible implementation, the cooling mechanism includes a spiral pipe, which is wound around the radial outer side wall of the inner cylinder and is arranged corresponding to the filter layer;

[0025] The spiral pipe has a second inlet end and a second outlet end, and the second inlet end and the second outlet end both pass through the shell; wherein the spiral pipe is configured to accommodate refrigerant.

[0026] In a possible implementation, an oil collecting tank is included, the oil collecting tank is arranged in the second separation channel, and the oil collecting tank is connected to the shell and the inner cylinder respectively.

[0027] In a possible implementation, the oil collecting tank includes a first folded edge, a third ring plate, and a second folded edge connected in sequence, the third ring plate is arranged obliquely relative to the first folded edge and the second folded edge, the first folded edge is connected to the shell, and the second folded edge is connected to the inner cylinder;

[0028] Wherein, the second folded edge is provided with a plurality of third oil holes.

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

[0030] In a possible implementation, the shell is provided with an oil outlet and an air outlet on both sides along the axial direction thereof, respectively; wherein the air outlet and the first inlet end are located on the same side.

[0031] In a second aspect, the present application provides a refrigeration device, comprising 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] The above-mentioned technical scheme provided by the embodiment of the present application has the following advantages compared with the prior art: 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 to the filter layer to complete the second separation, and the oil-gas mixture passing through the filter layer flushes the cooling mechanism to condense it into a liquid mixture, and 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 increases, and the liquid mixture is heated to complete the third separation, and the processes of collision, centrifugation, sedimentation, filtration and distillation are carried out to realize the step-by-step separation of the oil-gas mixture, and large-particle oil droplets, medium-particle oil droplets, small-particle oil droplets and tiny-particle oil droplets are separated in turn, completing the deep separation of the oil-gas mixture, preventing it from following the refrigerant into the condenser or evaporator, and improving the efficiency of the entire refrigeration equipment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0036] Figure 1 A schematic diagram of the structure of an oil separation device provided in an embodiment of the present application;

[0037] Figure 2A schematic cross-sectional view of an oil separation device provided in an embodiment of the present application;

[0038] Figure 3 A schematic cross-sectional view of an oil separation device provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of the separation mechanism provided in the embodiment of the present application;

[0040] Figure 5 A schematic diagram of the structure of the first sealing plate provided in an embodiment of the present application;

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

[0042] Figure 7 A schematic cross-sectional view of an oil separation device provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of the structure of the second sealing plate provided in an embodiment of the present application;

[0044] Fig. 9 A schematic diagram of the structure of the second cylinder provided in an embodiment of the present application;

[0045] Fig.10 A schematic diagram of the structure of the cooling mechanism provided in the embodiment of the present application;

[0046] Fig.11 A schematic diagram of the structure of the oil collecting tank provided in an embodiment of the present application.

[0047] Description of reference numerals:

[0048] 1. Shell; 11. Accommodating space; 12. Upper cover; 13. Lower cover; 14. Main body; 15. Oil outlet; 16. Air outlet; 17. Air inlet; 18. Second separation channel; 19. Support; 2. Separation mechanism; 21. First pipeline; 211. First inlet end; 212. First outlet end; 213. First flow guide channel; 2131. Air flow channel; 2132. First oil channel; 22. First sealing plate; 221. Flat plate; 222. First ring plate; 223. Second ring plate; 2231. First oil 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 annular cylinder; 34. Second cylinder body; 341. Second annular cylinder; 342. Supporting ring plate; 3421. Second oil hole; 4. Cooling mechanism; 41. Spiral pipe; 42. Second inlet end; 43. Second outlet end; 5. Oil collecting tank; 51. First folded edge; 511. Balance hole; 52. Third annular plate; 53. Second folded edge; 531. Third oil hole. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0050] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0051] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may 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 herein are interpreted accordingly.

[0052] In the related technologies, common oil separators mainly include centrifugal, washing, filter and packing types, etc., and their technical principles are mainly to use centrifugal force, inertial collision, gravity sedimentation, as well as fillers, filters, molecular sieve filtration and other technologies to separate oil and gas. However, these technologies have certain limitations in practical applications. For example, centrifugal force, inertial collision, and gravity sedimentation all use the density difference between oil and gas for separation, so they can only separate large oil droplets with a diameter of more than 20um. The filter method relies on the change in flow direction, deceleration, capture, and accumulation of oil and gas when passing through the filter, so that small oil droplets gradually accumulate into large oil droplets and flow to the lower oil tank under the action of gravity. This form can separate oil droplets with a medium particle size of 5-20um; the above two methods cannot effectively separate oil droplets with a tiny particle size less than 5um. At present, molecular sieves are more effective in separating small particle size oil droplets, but due to their poor permeability, the pressure loss is very large. If the pressure drop is reduced by increasing the area and reducing the flow rate, the cost will increase significantly, and the molecular sieve structure is easy to clog and has a short service life. It needs to be replaced regularly and has a high maintenance cost.

[0053] In order to solve the above technical problems, the present application provides an oil separation device, in which the oil-gas mixture collides with the first pipe and the first sealing plate in the separation mechanism to complete the first separation, and the oil-gas mixture flowing out of the first guide channel can collide with the first separation channel and flow to the filter layer to complete the second separation, and the oil-gas mixture passing through the filter layer flushes the cooling mechanism to condense it into a liquid mixture, and 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 increases, and the liquid mixture is heated to complete the third separation, and collision, centrifugation, sedimentation, filtration and distillation processes are carried out to realize the step-by-step separation of the oil-gas mixture, and large-particle oil droplets, medium-particle oil droplets, small-particle oil droplets and tiny-particle oil droplets are separated in turn, completing the deep separation of the oil-gas mixture, preventing it from following the refrigerant into the condenser or evaporator, and improving the efficiency of the entire refrigeration equipment.

[0054] In some exemplary embodiments, Figure 1-Figure 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 key components of the refrigeration equipment, such as condensers and evaporators, thereby ensuring the overall performance and stability of the refrigeration equipment. The oil separation device includes a shell 1, a separation mechanism 2, an inner cylinder 3, and a cooling mechanism 4. The shell 1, the separation mechanism 2, the inner cylinder 3, and the cooling mechanism 4 are all connected by welding to improve the reliability and stability of the connection between the components.

[0055] The housing 1 has a containing space 11 inside to accommodate the separation mechanism 2, the inner cylinder 3 and the cooling mechanism 4, and ensure the flatness of the 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 ring cylinder, and the upper cover 12 and the lower cover 13 are both semicircular and are fastened to the body 14 by welding to close the containing space 11 and improve the structural stability of the housing 1.

[0056] For example, at least an oil outlet 15, an air outlet 16 and an air inlet 17 are provided on the shell 1. The oil outlet 15 and the air outlet 16 are provided on both sides of the shell 1 along the axial direction thereof. The air inlet 17 is used to receive the oil-gas mixture. The air inlet 17 is provided on the upper cover 12. When the oil-gas mixture is introduced, it has a certain pressure and impact force and can move downward. The air outlet 16 is provided on the upper cover 12. The separated refrigerant will flow upward and be discharged from the air outlet 16. The oil outlet 15 is used to discharge the separated lubricating oil. The oil outlet 15 is provided on the lower cover 13, for example, to facilitate centralized recovery.

[0057] It should be noted that some auxiliary components are also provided on the outside of the shell 1 to ensure the stability of the shell 1. The shell 1 can be connected to the unit bracket or base by bolts, or can be directly welded to the bracket or base, or can be connected to a preset foundation on the ground by bolts or screws. For example, a support 19 is also provided at the lower end of the shell 1, and the support 19 can be used to support the shell 1, provide balance and stability for the shell 1, and prevent the shell 1 from shaking. Among them, the support 19 raises the overall height of the shell 1, avoids the oil outlet 15, and facilitates the discharge and collection of lubricating oil.

[0058] In this embodiment, if Figure 2-Figure 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 the air inlet 17, and passes through the shell 1. The first inlet end 211 is used to pass the oil-gas mixture. A first guide channel 213 is provided on the side wall of the first pipe 21 near the first outlet end 212, and the first sealing plate 22 is provided at the first outlet end 212. The high-temperature and high-pressure oil-gas mixture discharged by the compressor enters the first pipe 21 through the first inlet end 211, and impacts the first sealing plate 22 at a high speed along the axial direction of the first pipe 21, and realizes preliminary impact separation through the first sealing plate 22, that is, the first separation. At this time, large-size oil droplets and some medium-size oil droplets are separated. The large-sized oil droplets and some medium-sized oil droplets separated by impact enter the first guide channel 213 to facilitate the subsequent collection of lubricating oil, and the oil-gas mixture that has not yet been separated is turned after impacting the first sealing plate 22 to flow into the first guide channel 213 to facilitate the subsequent second separation.

[0059] In this embodiment, if Figure 2-Figure 7 As shown, the inner cylinder 3 is arranged in the accommodating space 11 of the shell 1. The inner cylinder 3 is a hollow structure. The inner cylinder 3 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 a first separation channel 31. After the oil-gas mixture in the first pipe 21 vertically hits 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. The oil-gas mixture enters the first separation channel 31 and flows upward. Among them, when the oil-gas mixture enters the first separation channel 31, it will hit the inner wall of the inner cylinder 3, and some separation effects can also be achieved.

[0060] The side wall of the inner cylinder 3 is provided with a filter layer 32. The oil-gas mixture in the first separation channel 31 flows upward to the filter layer 32, and the filter layer 32 can perform a second separation on it. At this time, the medium-sized oil droplets and some small-sized oil droplets are separated. The second separation channel 18 is formed between the inner cylinder 3 and the shell 1, and the oil-gas mixture that has not been separated enters the second separation channel 18 for subsequent third separation.

[0061] In this embodiment, if Figure 2-Figure 10 As shown, the cooling mechanism 4 is arranged in the second separation channel 18 and connected to the inner cylinder 3 to improve the stability of the cooling mechanism 4. Among them, the oil-gas mixture flowing out of the filter layer 32 flows to the cooling mechanism 4, flushes the cooling mechanism 4, and part of the gaseous refrigerant condenses into liquid refrigerant. The small-size oil droplets dissolve in the liquid refrigerant to form a liquid mixture. Based on the action of gravity, it drips down to the side wall of the inner cylinder 3. When the oil-gas mixture enters the first separation channel 31, it will hit the inner wall of the inner cylinder 3, that is, the high-temperature gas continuously impacts the inner wall of the inner cylinder 3, forming a hot wall surface. The liquid mixture exchanges heat with the hot wall surface of its inner cylinder 3. Due to the different boiling points of oil and refrigerant, the liquid refrigerant is volatilized by heat, and the lubricating oil is not volatilized, so that the lubricating oil is left, and the third separation is achieved. At this time, the 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 of this embodiment effectively improves the separation efficiency of the oil-gas mixture through a multi-stage separation and cooling mechanism, ensures that the refrigerant gas is discharged with sufficient purity for use in the condenser and evaporator, and ensures the stable operation of the refrigeration equipment.

[0063] In some exemplary embodiments, Figure 2-Figure 6 As shown, the first guide channel 213 includes a plurality of air flow channels 2131 and a plurality of first oil channels 2132. The plurality of air flow channels 2131 are arranged in sequence along the circumference of the first pipe 21. The air flow channels 2131 are configured to transport the oil-gas mixture that has undergone the first separation. The air flow channels 2131 are, for example, rectangular in shape and penetrate the side wall of the first pipe 21. This not only ensures that the oil-gas mixture can smoothly pass through the air flow channels 2131 after the first separation to continue its subsequent separation or processing process; at the same time, the rectangular air flow channels 2131 provide sufficient circulation space, have fluid mechanics properties and mechanical strength, reduce flow resistance, and improve separation efficiency.

[0064] A plurality of first oil channels 2132 are located at the first outlet end 212 of the first pipe 21, and the plurality of first oil channels 2132 are arranged along the circumference of the first pipe 21. The first oil channels 2132 are configured to convey the lubricating oil after the first separation. The first oil channels 2132 are notched at the edge of the first outlet end 212 and penetrate the side wall of the first pipe 21. The lubricating oil will slide along the inside of the first pipe 21 and then flow along the first oil channels 2132. The airflow channel 2131 and the first oil channel 2132 are not connected to avoid mutual interference, thereby ensuring the stability and reliability of the separation process and reducing the risk of separation failure caused by poor flow or re-carrying of the oil-gas mixture.

[0065] By rationally arranging the air flow channel 2131 and the first oil channel 2132, efficient separation of the oil-gas mixture is achieved. 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 air flow channel 2131, reducing energy loss and time consumption during the separation process.

[0066] In this embodiment, if Figure 2-Figure 6 As shown, the circumferential outer wall of the first pipe 21 is provided with a plurality of guide plates 23, and the guide plates 23 are arranged at the edge of the airflow channel 2131. Among them, the guide plates 23 and the first pipe 21 are at a preset angle. Exemplarily, the first pipe 21 has a plurality of element lines, one of which is connected to the guide plate 23, and there is a preset angle α between the element line and the guide plate 23, and the preset angle α is, for example, 30°-60°, which is used to achieve drainage, guide the oil-gas mixture in the airflow channel 2131 to flow along the guide plate 23, so that the oil-gas mixture can be obliquely impacted to the inner wall of the inner cylinder 3 at a certain angle, and generate a rotating flow along the inner wall of the inner cylinder 3, complete further impact and centrifugation, and fully separate large-size oil droplets. At the same time, the introduction of the guide plate 23 not only changes the flow direction of the oil-gas mixture, but also optimizes the distribution of the flow field, so that the flow in the inner cylinder 3 is more uniform, the generation of vortices and dead zones is reduced, and the separation effect is further improved.

[0067] Since the guide plates 23 are able to guide the oil-gas mixture to flow in a stable manner, they also help to enhance the stability of the entire oil-gas separation device, reducing the risk of separation failure or equipment damage due to unstable flow.

[0068] In this embodiment, if Figure 2-Figure 6As shown, the circumferential outer side wall of the first pipe 21 is provided with a baffle 24, which is provided on one side of the airflow channel 2131 close to 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 create an obstruction, preventing the further flow of the oil-gas mixture and reducing the flow rate. By slowing down the flow rate of the oil-gas mixture, the baffle 24 allows the oil-gas mixture to have more sufficient mixing and preparation time before entering the filter layer 32 of the first separation channel 31, which helps to more effectively separate the oil droplets in the subsequent separation process, thereby improving the overall separation efficiency.

[0069] There is a first preset distance between the baffle 24 and the inner cylinder 3 to ensure the patency of the first separation channel 31 and avoid the flow blockage problem caused by too small a distance. After the oil-gas mixture is decelerated by the baffle 24, the buoyancy is reduced, and the large-size oil droplets and part of the medium-size oil droplets entrained in the oil-gas mixture are further settled and separated under the action of gravity. The settled oil-gas mixture contains medium-size oil droplets and small-size oil droplets, flows to the upper part of the first separation channel 31, and flows to the filter layer 32 at a lower flow rate.

[0070] The introduction of the baffle 24 not only changes the flow velocity of the oil-gas mixture, but also has a certain influence 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 prolongs its service life.

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

[0073] In this embodiment, if Figure 2-Figure 6 As shown, the first sealing plate 22 includes a flat plate 221, a first ring plate 222 and a second ring plate 223, and the flat plate 221 is connected to the second ring plate 223 through the first ring plate 222. The first ring plate 222 is arranged to be inclined relative to the flat plate 221 and the second ring plate 223, that is, the first ring plate 222 has an inclined annular surface, and the lubricating oil flowing out of the first oil channel 2132 can flow smoothly along the inclined annular surface of the first ring plate 222, thereby realizing the accumulation of the lubricating oil, avoiding the dispersion and loss of the lubricating oil, and can be collected in a centralized manner later, thereby improving the collection efficiency of the lubricating oil.

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

[0075] The second ring plate 223 is connected to the inner cylinder 3 to block the inner cylinder 3 to ensure that the lubricating oil can further accumulate above the second ring plate 223. Among them, the second ring plate 223 is provided with a plurality of first oil holes 2231, and the first oil holes 2231 are connected to the accommodating space 11 of the shell 1, and the lubricating oil can flow into the accommodating space 11 of the shell 1 along the first oil holes 2231. The lower cover 13 of the shell 1 is semicircular, and the oil outlet 15 is located on the central axis of the lower cover 13. After the lubricating oil flows into the accommodating space 11, it will accumulate along the semicircular shape of the lower cover 13, which simplifies the collection process of the lubricating oil and reduces the difficulty of operation. When the accumulation reaches a certain level, it can be conveniently collected and processed by opening the oil outlet 15, which improves work efficiency.

[0076] In some exemplary embodiments, Figure 2-Figure 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 pipeline 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 pipeline 21, ensuring that the oil-gas mixture can smoothly enter the inner cylinder 3 (i.e., the first separation channel 31) for processing. Among them, the space formed between the first cylinder 33 and the first pipeline 21 and the space formed between the second cylinder 34 and the first pipeline 21 together constitute the first separation channel 31, and the other end of the second cylinder 34 is connected to the first sealing plate 22, which plays a role of sealing and guiding.

[0077] The filter layer 32 is disposed on the side wall of the first cylinder 33 , and the oil-gas mixture coming out of the air flow channel 2131 impacts the second cylinder 34 and then flows onto the filter layer 32 of the first cylinder 33 .

[0078] In this embodiment, if Figure 2-Figure 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 a carrier of the filter layer 32. Exemplarily, the first annular cylinder 332 is provided with an escape opening, and the filter layer 32 includes a filter mesh body, which is embedded in the escape opening and can be easily assembled and disassembled, greatly facilitating subsequent cleaning or replacement work.

[0079] Alternatively, the filter layer 32 and the first ring cylinder 332 are integrally formed, 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 mesh body is woven from a cylindrical stainless steel wire mesh with a certain thickness, and the filter mesh body has multiple pores. The oil droplets filtered inside the filter mesh body will accumulate and fall and flow onto the second cylinder 34.

[0080] The medium-sized oil droplets and some small-sized oil droplets in the oil-gas mixture in the filter body are captured and gradually accumulated into large-sized oil droplets. The gathered large-sized oil droplets flow downward under the action of gravity and finally flow to the second cylinder 34, thus realizing the second separation of the oil-gas mixture.

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

[0082] Exemplarily, the second sealing plate 331 includes a plate body 3311, an inner folding edge 3312 and an outer folding edge 3313. The plate body 3311 is annular, the inner folding edge 3312 is connected to the inner ring of the plate body 3311, and the outer folding 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 fold edge 3312 can be connected to the outer wall of the first pipe 21 , and the inner fold 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 sleeved on one end of the second cylinder 34, which not only plays a role in positioning and connecting, preventing the second cylinder 34 and the second sealing plate 331 from generating a gap due to misalignment and affecting the sealing, but also further increases the connection area with the second sealing plate 331, ensuring the stability of the second cylinder 34.

[0085] Through the cooperation of the filter layer 32 and the first separation channel 31 , the present embodiment can efficiently capture the oil droplets in the oil-gas mixture, realize the effective separation of the oil-gas mixture, and improve the separation processing efficiency.

[0086] In this embodiment, if Figure 2-Figure 9As shown, the second cylinder 34 includes a second annular cylinder 341 and a supporting annular 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 can effectively prevent the leakage of the oil-gas mixture and ensure the sealing of the oil-gas separation device. The space formed by the second annular cylinder 341, the first sealing plate 22 and the first pipeline 21 is equivalent to an oil collection space, which is used to collect the lubricating oil separated from the filter layer 32 for subsequent recycling.

[0087] The support ring plate 342 is connected to the radial inner wall side of the second ring cylinder 341, and the support ring plate 342 is used to support the first ring cylinder 332. The oil droplets separated from the filter layer 32 can flow to the support ring plate 342 based on gravity to achieve accumulation. Among them, the ring diameter size of the support ring plate 342 is greater than or equal to the wall thickness size of the first ring cylinder 332, ensuring that the oil droplets in the filter layer 32 can flow to the support ring plate 342 to achieve collection.

[0088] In addition, the design of the support ring plate 342 also takes into account the accumulation and discharge of oil droplets, so as to ensure that the oil droplets separated from the filter layer 32 can flow smoothly to the support ring plate 342 for effective collection. A plurality of second oil holes 3421 are provided on the support ring plate 342, which allow the lubricating oil on the support ring plate 342 to drip onto the second ring plate 223 of the first sealing plate 22, and enter the housing 1 through the first oil hole 2231 in the second ring plate 223 for centralized collection and treatment. This design not only simplifies the collection process of oil droplets, but also improves the overall cleanliness of the equipment.

[0089] There is a second preset spacing between the support ring plate 342 and the first pipe 21 to ensure the patency of the first separation channel 31. The support ring plate 342 is located above the baffle 24, the support ring plate 342 is connected to the second cylinder 34, and 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 up and down. This design makes the first separation channel 31 configured into a 'Z' channel shape. When the oil-gas mixture passes through, it will pass through the double obstruction of the baffle 24 and the support ring plate 342, achieving the effects of impacting the inner wall, centrifugal rotation, and slowing down the flow rate, and can more effectively separate the oil droplets.

[0090] This embodiment significantly improves the oil-gas separation efficiency and overall performance of the oil-gas separation device by optimizing the structural design of the second cylinder 34, and at the same time enhances the stability and maintenance convenience of the oil-gas separation device. And through the support ring plate 342 and the baffle 24, and their relative positional relationship with the first pipeline 21 and the second cylinder 34, this embodiment successfully constructs an efficient first separation channel 31 in the shape of a 'Z' channel. This design enables more effective oil droplet separation when the oil-gas mixture passes through.

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

[0092] The spiral pipe 41 has a second inlet end 42 and a second outlet end 43, and the second inlet end 42 and the second outlet end 43 both pass through the housing 1 to facilitate communication with external equipment, and the external equipment is, for example, respectively communicated with the second inlet end 42 and the second outlet end 43, so as to realize the circulation of the refrigerant. The spiral pipe is configured to accommodate the refrigerant so as to condense the gaseous refrigerant in the oil-gas mixture into a 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-particle oil droplets or micro-particle oil droplets, which are difficult to be effectively removed in the conventional separation process. In this embodiment, the low-temperature medium (i.e., refrigerant) in the spiral pipe 41 plays a key role. Since the wall temperature of the spiral pipe 41 is set to be lower than the condensation temperature corresponding to the gaseous refrigerant in the oil-gas mixture, when the oil-gas mixture flows through the spiral pipe 41, part of the gaseous refrigerant therein will condense into liquid refrigerant, and form a series of condensed liquid columns in the circumferential direction of the spiral pipe 41, like a rain curtain. A certain interval is maintained between these liquid columns. When the oil-gas mixture passes through these liquid rain curtains, due to the mutual solubility between oil and liquid refrigerant, those small-particle oil droplets and micro-particle oil droplets that are difficult to separate will dissolve in the condensate to form a liquid mixture and drip down together.

[0094] These liquid mixtures flow to the second cylinder 34 of the inner cylinder 3, and are heated to complete the third separation. In this process, the high-temperature and high-pressure oil-gas mixture coming out of the airflow channel 2131 will impact the second cylinder 34, causing its temperature to rise and forming a hot wall. Due to the different boiling points of lubricating oil and liquid refrigerant, when the liquid mixture encounters such a hot wall, the liquid refrigerant will evaporate due to heat, while the lubricating oil will not evaporate. Therefore, the lubricating oil is successfully retained, while the small-particle oil droplets and micro-particle oil droplets are deeply separated through the combination and volatilization process with the liquid refrigerant, that is, the third separation is completed.

[0095] This embodiment achieves deep separation of small-size oil droplets and micro-size oil droplets by introducing 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 separation device, but also ensures that the discharged gas is cleaner. In addition, the heat exchange process between the spiral pipe 41 and the second cylinder 34 of the inner cylinder 3 is cleverly utilized, which not only realizes the condensation and volatilization of the refrigerant, but also utilizes the thermal energy of the high-temperature and high-pressure oil-gas mixture. This design not only improves the energy utilization efficiency, but also reduces the operating cost of the equipment.

[0096] In this embodiment, if Figure 2-Figure 11 As shown, the oil separation device includes an oil collecting tank 5, which is arranged in the second separation channel 18, and the oil collecting tank 5 is closely connected with the housing 1 and the inner tube 3. The oil collecting tank 5 is used to collect the lubricating oil separated for the third time.

[0097] Exemplarily, the oil collecting tank 5 includes a first folded edge 51, a third ring plate 52 and a second folded edge 53 connected in sequence, the first folded edge 51 is connected to the shell 1, the second folded edge 53 is connected to the second cylinder 34 of the inner cylinder 3, and the third ring plate 52 is inclined relative to the first folded edge 51 and the second folded edge 53, which not only effectively reduces the volume of the oil collecting tank 5, making the entire device more compact and convenient for collecting lubricating oil, but also ensures that the liquid mixture in the oil collecting tank 5 can be closely attached 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 faster, leaving pure lubricating oil.

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

[0099] In addition, in order to prevent the lubricating oil from being unable to flow smoothly into the shell 1 due to excessive pressure in the oil collecting tank 5, the first folded edge 51 is also provided with a plurality of balancing holes 511. The balancing holes 511 can make the upper and lower spaces of the oil collecting tank 5 at the same pressure, thereby ensuring that the lubricating oil can drip smoothly into the shell 1 under the action of gravity, which not only improves the stability and reliability of the device, but also further simplifies the maintenance process.

[0100] This embodiment successfully improves the separation efficiency of the oil-gas separation device, simplifies the collection process, enhances stability and optimizes the structural design by optimizing the structural design of the oil collecting tank 5. The oil collecting tank 5 allows the liquid mixture to be heated by the hot wall more quickly, thereby achieving rapid volatilization of the liquid refrigerant and separation of the lubricating oil. The design of the third oil hole 531 on the second fold 53 allows the lubricating oil to flow smoothly to the lower cover 13 of the shell 1 and finally be discharged through the oil outlet 15, which not only simplifies the collection process, but also improves the automation level of the entire device. The balancing hole 511 on the first fold 51 effectively prevents problems caused by excessive pressure in the oil collecting tank 5, ensures the smooth discharge of the lubricating oil, improves the stability of the device, and reduces the failure rate.

[0101] The present application also provides a refrigeration device with efficient refrigeration performance. The refrigeration device includes an evaporator, a condenser, a device body, and an oil separation device as 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] As the main structure of the refrigeration equipment, the equipment body carries key components such as the evaporator, condenser and oil separation device. Its design fully considers the operation requirements of the refrigeration equipment and ensures close cooperation and efficient coordination between various components.

[0103] During the operation of the refrigeration equipment, the refrigerant absorbs heat in the evaporator and turns into gas, and then enters the oil separation device after being compressed by the compressor. In the oil separation device, the lubricating oil and the refrigerant are efficiently separated, the lubricating oil is recovered and re-injected into the compressor, and the refrigerant continues to enter the condenser for condensation. The condensed refrigerant enters the evaporator again for evaporation, thus forming a complete refrigeration cycle.

[0104] By optimizing the design of the oil separation device, the refrigeration equipment of 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 to reduce the energy consumption and wear of the compressor, thereby improving the refrigeration efficiency of the entire refrigeration equipment.

[0105] The efficient separation capacity of the oil separator ensures sufficient supply of lubricating oil in the compressor, thus avoiding compressor failure caused by insufficient lubricating oil. This helps to extend the service life of the compressor and improves the stability of the entire refrigeration system.

[0106] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0107] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0108] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but rather to 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 comprises a first pipeline and a first sealing plate, wherein the first pipeline has a first inlet end and a first outlet end, and a first guide channel is arranged on a side wall of the first pipeline near the first outlet end, the first inlet end passes through the shell, and the first sealing plate is arranged at the first outlet end; wherein the 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 guide channel; an inner cylinder, arranged in the shell and sleeved on the outer side of the separation mechanism, wherein 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; wherein 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; and A cooling mechanism is arranged in 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, and the liquid mixture flows to the side wall of the inner cylinder located in 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 guide channel includes a plurality of air flow channels and a plurality of first oil channels, the plurality of air flow channels are sequentially arranged along the circumference of the first pipeline and penetrate the side wall of the first pipeline, and the air flow channels are configured to transport the oil-gas mixture that has undergone the first separation; A plurality of the first oil channels are located at the first outlet end of the first pipeline, the plurality of the first oil channels are arranged along the circumference of the first pipeline and penetrate the side wall of the first pipeline, and the first oil channels are configured to transport the lubricating oil that has undergone the first separation; Wherein, the air flow channel and the first oil channel are not connected.

3. The oil separation device according to claim 2, characterized in that: The circumferential outer side wall of the first pipe is provided with a plurality of guide plates, and the guide plates are provided at the edge of the air flow channel; Wherein, a preset angle is formed between the guide plate and the first pipe.

4. The oil separation device according to claim 2, characterized in that: A baffle is provided on the circumferential outer side wall of the first pipe, and the baffle is provided on a side of the air flow channel close to the first inlet end; wherein a first preset distance is provided between the baffle and the inner tube.

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 holes; The first ring plate is tilted relative to the flat plate and the second ring plate, the flat plate is connected to the first outlet end of the first pipeline to block the first outlet end, and the second ring plate is connected to the inner tube.

6. The oil separation device according to claim 1, characterized in that: The inner cylinder comprises a first cylinder and a second cylinder, the first cylinder and the second cylinder are connected, the first cylinder is connected to the first pipeline, and the second cylinder is connected to the first sealing plate; wherein the filter layer is arranged 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 arranged on a 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 pipeline.

8. The oil separation device according to claim 7, characterized in that: The filter layer comprises a filter mesh body, and the first ring cylinder is provided with an avoidance opening for embedding the filter mesh body.

9. The oil separation device according to claim 7, characterized in that: The second cylinder body comprises a second annular cylinder and a supporting annular plate, and 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 tube, and the support ring plate is used to support the first ring tube; wherein, there is a second preset distance between the support ring plate and the first pipeline, and a plurality of second oil holes are arranged on the support ring plate.

10. The oil separation device according to claim 9, characterized in that: The ring diameter of the supporting 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 comprises a spiral pipe, which is wound around the radial outer side wall of the inner cylinder and is arranged corresponding to the filter layer; The spiral pipe has a second inlet end and a second outlet end, and the second inlet end and the second outlet end both pass through the shell; wherein the spiral pipe is configured to accommodate refrigerant.

12. The oil separation device according to claim 1, characterized in that: An oil collecting tank is included, and the oil collecting tank is arranged in the second separation channel. The oil collecting tank is connected to the shell and the inner cylinder respectively.

13. The oil separation device according to claim 12, characterized in that: The oil collecting tank comprises a first folded edge, a third ring plate and a second folded edge connected in sequence, the third ring plate is arranged obliquely 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; Wherein, the second folded edge is provided with a plurality of third oil holes.

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

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

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

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