Oil-gas separation device, refrigerating system and air conditioner

Abstract

The invention relates to an oil-gas separation device, a refrigerating system and an air conditioner. The oil-gas separation device is used for improving the oil-gas separation efficiency. The oil-gas separation device comprises a shell, the shell is sequentially provided with an inlet, a first outlet and a second outlet from top to bottom in the vertical direction, the inner wall of the shell is provided with a spiral groove, and the spiral groove is located between the inlet and the first outlet; and the separation net is arranged in the shell and is positioned between the spiral groove and the first outlet. According to the oil-gas separation device, centrifugal separation formed by the spiral groove is combined with inertial collision separation achieved by the separation net, lubricating oil in exhausted gas of the compressor can be effectively recycled in a compact structure, and the oil-gas separation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of refrigeration technology, and in particular, to an oil-gas separation device, a refrigeration system and an air conditioner. BACKGROUND

[0002] In a high-temperature heat pump centrifuge system using oil bearings, during system operation, limited by the gap between the bearing and the shaft, the gap between the comb seal and the shaft and the impeller, etc., the lubricating oil will inevitably enter the refrigeration system. At this time, the lubricating oil in the refrigeration system needs to be recovered to ensure the normal circulation of the lubrication system and ensure the continuous oil supply of the bearing. SUMMARY

[0003] Some embodiments of the present disclosure provide an oil-gas separation device, a refrigeration system and an air conditioner to improve the oil-gas separation efficiency.

[0004] In one aspect of the present disclosure, an oil-gas separation device is provided, comprising:

[0005] a housing, an inlet, a first outlet and a second outlet being sequentially arranged on the housing in a vertical direction from top to bottom, an inner wall of the housing being provided with a spiral groove, the spiral groove being located between the inlet and the first outlet; and

[0006] a separation net being arranged in the housing and located between the spiral groove and the first outlet.

[0007] In some embodiments, the separation net is configured as a downwardly concave net body.

[0008] In some embodiments, the oil-gas separation device further comprises:

[0009] a first collection disc being arranged in the housing and located between the first outlet and the second outlet, a plurality of fluid inlets being formed between the outer edge of the first collection disc and the inner wall of the housing, a plurality of guide grooves being arranged on the lower surface of the first collection disc, a first end of each guide groove being in communication with one of the fluid inlets, and a second end of the guide groove extending to the middle region of the first collection disc.

[0010] In some embodiments, the first collection disc is provided with a first necked portion that is downwardly contracted, and the first necked portion is located in the middle region of the first collection disc.

[0011] In some embodiments, the oil-gas separation device further comprises:

[0012] a first collection disc being fixedly connected with the inner wall of the housing and located between the first outlet and the second outlet, the first collection disc being provided with a first guide opening;

[0013] A second collection tray is located below the separating net, and the second collection tray is provided with a second guide port; and

[0014] The collection tube has its first end connected to the first guide port and its second end connected to the second guide port.

[0015] In some embodiments, the first collecting tray has a downwardly constricted first narrowing portion, and the first guide port is disposed in the first narrowing portion; and / or

[0016] The second collecting tray has a downwardly contracting second constriction portion, and the second guide port is located in the second constriction portion.

[0017] In some embodiments, the oil-gas separation device further includes:

[0018] The cylinder has its bottom connected to the first collecting tray and its top connected to the separating net. The first outlet communicates with the internal space of the cylinder, and the second collecting tray and the collecting pipe are located inside the cylinder.

[0019] In some embodiments, the oil-gas separation device further includes:

[0020] A cooling element, disposed within the housing and located between the first collection tray and the second outlet, is configured to cool the fluid.

[0021] In some embodiments, the oil-gas separator further includes a guide member disposed within the housing and located between the inlet and the spiral groove; the guide member includes a support portion and a plurality of guide vanes, a first end of the guide vanes being connected to the support portion and a second end of the guide vanes being connected to the inner wall of the housing.

[0022] In one aspect of this disclosure, a refrigeration system is provided, including a compressor, a first heat exchanger, a second heat exchanger, and the aforementioned oil-gas separation device;

[0023] The compressor's exhaust port is connected to the inlet of the oil-gas separator, the first outlet of the oil-gas separator is connected to the first heat exchanger, the first heat exchanger is connected to the second heat exchanger, and the second heat exchanger is connected to the compressor's air inlet.

[0024] In some embodiments, the refrigeration system further includes:

[0025] The oil tank is connected to the second outlet of the oil-gas separator and the oil supply port of the compressor.

[0026] In some embodiments, the refrigeration system further includes:

[0027] The ejector has a first interface connected to the first heat exchanger, a second interface connected to the second heat exchanger, and a third interface connected to the oil tank.

[0028] In some embodiments, the refrigeration system further includes:

[0029] The balance pipe has one end connected to the oil tank and the other end connected to the pipeline located between the second heat exchanger and the compressor.

[0030] In some embodiments, the oil-gas separation device further includes a cooling element disposed within the housing; the cooling element includes a coil, the refrigerant inlet of the coil being connected to the first heat exchanger, and the refrigerant outlet of the coil being connected to the second heat exchanger.

[0031] In one aspect of this disclosure, an air conditioner is provided, including the refrigeration system described above.

[0032] Based on the above technical solution, this disclosure has at least the following beneficial effects:

[0033] In some embodiments, the oil-gas separator combines centrifugal separation formed by spiral grooves with inertial collision separation achieved by a separation net, which can effectively recover lubricating oil in compressor exhaust within a more compact structure and improve oil-gas separation efficiency. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this disclosure, illustrate exemplary embodiments of the present disclosure and are used to explain the disclosure, but do not constitute an undue limitation of the disclosure. In the drawings:

[0035] Figure 1 This is a longitudinal cross-sectional schematic diagram of an oil-gas separation device provided according to some embodiments of the present disclosure;

[0036] Figure 2 This is a cross-sectional schematic diagram of an oil-gas separation device provided according to some embodiments of the present disclosure;

[0037] Figure 3 This is a schematic diagram of the structure of a first collection tray provided according to some embodiments of the present disclosure;

[0038] Figure 4 This is a bottom view of a first collection tray provided according to some embodiments of the present disclosure;

[0039] Figure 5 This is a top view schematic diagram of a first collection tray provided according to some embodiments of the present disclosure;

[0040] Figure 6 This is a schematic diagram of the structure of a guide member provided according to some embodiments of the present disclosure;

[0041] Figure 7 for Figure 1 An enlarged schematic diagram of local structure A in the image;

[0042] Figure 8 for Figure 2 An enlarged schematic diagram of local structure B in the image;

[0043] Figure 9 This is a schematic diagram of a refrigeration system provided according to some embodiments of the present disclosure.

[0044] The labels in the attached diagram are explained as follows:

[0045] 1-Shell; 11-First outlet; 12-Second outlet; 13-Inlet; 14-Spiral groove;

[0046] 2-Separation network;

[0047] 3-First collecting tray; 31-First guide port; 32-Guide groove; 33-First constriction; 34-Fluid inlet;

[0048] 4-Second collection tray; 41-Second flow guide port;

[0049] 5-Cylinder body;

[0050] 6-Collection tube;

[0051] 7-Cooling component; 71-First piping; 72-Second piping; 73-Coil;

[0052] 8-Guide component; 81-Support section; 82-Guide vane;

[0053] 10-Compressor; 20-First heat exchanger; 30-Second heat exchanger; 40-Oil tank; 50-Ejector; 60-Balance pipe; 70-Pump; 91-First throttle valve; 92-Second throttle valve; 93-Return oil valve;

[0054] 100 - Oil-gas separation unit.

[0055] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0056] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0057] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0058] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0059] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0060] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0061] refer to Figure 1 and Figure 2 In some embodiments, the oil-gas separation device 100 includes a housing 1 and a separation screen 2.

[0062] The housing 1 has an inlet 13, a first outlet 11, and a second outlet 12 arranged vertically from top to bottom. The inner wall of the housing 1 has a spiral groove 14 located between the inlet 13 and the first outlet 11.

[0063] The separation net 2 is located inside the housing 1 and between the spiral groove 14 and the first outlet 11.

[0064] In the above embodiments, the spiral groove 14 can be directly machined onto the inner wall of the housing 1 to form a groove structure. The spiral groove 14 may include one or more spiral grooves extending circumferentially. Each spiral groove 14 is evenly distributed circumferentially along the inner wall of the housing 1 and may have the same spiral direction and pitch, maintaining a distance from each other in the axial and circumferential directions to form multiple parallel spiral guide channels to guide the airflow to form a relatively stable rotating flow. The cross-sectional shape of the spiral groove 14 may be triangular, rectangular, trapezoidal, or arc-shaped, etc., and its depth and width can be adjusted according to conditions such as compressor exhaust flow rate and oil mist concentration.

[0065] The working process of the oil-gas separator 100 is as follows: The mixed airflow of refrigerant vapor and lubricating oil mist from the compressor enters the interior of the housing 1 through the inlet 13. Due to the guiding effect of the spiral groove 14, the mixed airflow moves downward in a spiral shape along the groove, thereby forming a rotating flow field inside the housing 1. During this process, in the mixed airflow of refrigerant vapor and lubricating oil mist, since the density of oil mist is greater than that of refrigerant vapor, most of the oil mist is thrown towards the inner wall of the housing 1 under the action of centrifugal force and agglomerates into droplets on the inner wall surface of the housing 1. These liquid lubricating oils flow downward along the inner wall of the housing 1 under the action of gravity and flow to the second outlet 12, realizing the centrifugal separation of oil and gas.

[0066] After centrifugal separation in the spiral groove 14 region, the mixed gas flow may still carry some oil mist. This gas flow then enters the region where the separation net 2 is located. When the gas flow passes through the separation net 2, the oil mist particles in it collide with the separation net 2 due to inertia and adhere to the surface of the separation net 2. The adhered oil droplets gradually gather and flow downward along the separation net 2 under the action of gravity, flowing towards the second outlet 12, thus achieving collision separation of oil and gas.

[0067] In the above embodiments, the oil-gas separation device 100 combines centrifugal separation formed by the spiral groove 14 with inertial collision separation achieved by the separation net 2, which can effectively recover lubricating oil in the compressor exhaust within a relatively compact structure and improve oil-gas separation efficiency.

[0068] In the above embodiments, the oil-gas separator 100 can be installed in the refrigeration system, for example, between the compressor and the condenser. After being separated by the oil-gas separator 100, the oil content of the refrigerant vapor is significantly reduced. After being discharged from the first outlet 11, it can be sent to the subsequent heat exchanger (such as the condenser) in the refrigeration system, which can reduce the accumulation of lubricating oil in heat exchange components such as the evaporator, and help maintain the heat exchange efficiency of the system and the lubrication reliability of the compressor. At the same time, since most of the lubricating oil is recovered in time and returned to the lubrication circuit through the second outlet 12, the lubricating oil recovery efficiency can be improved, thereby improving the reliability of the lubrication system and the refrigeration system.

[0069] In some embodiments, the cross-section of the helical groove 14 is outwardly flared; for example, the cross-section of the helical groove 14 may be triangular. Optionally, refer to... Figure 7 The included angle α between the two walls of the spiral groove 14 is greater than 90 degrees to facilitate the smooth sliding of the separated lubricating oil along the groove wall under the action of centrifugal force and gravity; the groove depth S of the spiral groove 14 is greater than 2 mm to provide sufficient oil holding space and reduce secondary entrainment; Reference Figure 1 The pitch P of the spiral groove 14 is no greater than 100 mm to ensure that the airflow maintains sufficient rotational intensity during axial flow and improves the centrifugal separation effect. Optionally, the outlet position of each spiral groove 14 is aligned axially with the corresponding fluid inlet 34 and is evenly distributed circumferentially along the inner wall of the housing 1 to facilitate structural alignment during manufacturing and assembly.

[0070] In some embodiments, the separating net 2 is configured as a downwardly concave net. Specifically, the separating net 2 can be a conical structure or a funnel-shaped structure.

[0071] In the above embodiment, the separating net 2 forms a recessed collection area inside the housing 1. When the airflow carrying residual oil mist passes through the separating net 2, the oil mist particles collide with the net wires due to inertia and adhere to them. Moreover, since the net body is concave, oil droplets are more likely to concentrate at the bottom of the concavity, which can reduce the possibility of being re-entrained due to airflow disturbance. In addition, the concave structure can appropriately prolong the residence time of the airflow in the separating net area, which is beneficial to improving the interception probability of fine oil mist particles, thereby helping to enhance the oil mist capture and collection effect.

[0072] refer to Figures 1 to 3 In some embodiments, the oil-gas separator 100 further includes a first collecting plate 3, which is disposed inside the housing 1 and located between the first outlet 11 and the second outlet 12. A plurality of fluid inlets 34 are formed between the outer edge of the first collecting plate 3 and the inner wall of the housing 1. A plurality of guide grooves 32 are provided on the lower surface of the first collecting plate 3. The first end of each guide groove 32 communicates with a fluid inlet 34, and the second end of the guide groove 32 extends to the middle region of the first collecting plate 3. (Refer to...) Figure 3 .

[0073] In the above embodiment, the first collecting tray 3 covers the entire internal cross-section of the housing 1. Multiple fluid inlets 34 are formed between the outer edge of the first collecting tray 3 and the inner wall of the housing 1. Liquid lubricating oil separated by the spiral groove 14 flows downwards along the inner wall of the housing 1 and can enter the bottom space of the first collecting tray 3 through the fluid inlets 34 between the outer edge of the first collecting tray 3 and the inner wall of the housing 1. Subsequently, under the action of gravity, this lubricating oil converges towards the central region along the guide groove 32 on the lower surface of the first collecting tray 3. Since the guide groove 32 guides and constrains the oil, it effectively reduces the diffusion or retention of oil on the tray surface and prevents it from being re-entrained due to airflow disturbances. Finally, the lubricating oil collected in the central region can drip naturally and be discharged through the second outlet 12, thereby achieving the collection and guidance of the lubricating oil flowing down the wall surface.

[0074] refer to Figure 3 In some embodiments, the first collection tray 3 is provided with a first constricted opening 33 that tapers downwards, and the first constricted opening 33 is located in the middle region of the first collection tray 3.

[0075] In the above embodiment, the first collecting disc 3 gradually narrows towards the central region, forming a funnel-shaped or conical structure. The second end of the guide channel 32 extends to the first constriction 33, which forms the lowest region, helping to further concentrate the lubricating oil collected by the guide channel 32. As the flow cross-section of the first constriction 33 gradually decreases along the flow direction, the oil is more likely to coalesce into larger droplets here, and under the action of gravity, it detaches from the disc and falls downward into the bottom of the housing 1, and is finally discharged through the second outlet 12. Furthermore, the contraction shape of the first constriction 33 can, to a certain extent, reduce the impact of the upward disturbance of the lower gas in the housing 1 on the collected oil, reducing the possibility of oil droplets being re-entrained into the airflow, thereby helping to maintain the stability of oil-gas separation.

[0076] refer to Figure 1 and Figure 2 In some embodiments, the oil-gas separation device 100 further includes a first collection plate 3, a second collection plate 4, and a collection pipe 6.

[0077] The first collection plate 3 is fixedly connected to the inner wall of the shell 1 and is located between the first outlet 11 and the second outlet 12. The first collection plate 3 is provided with a first guide port 31.

[0078] The second collection tray 4 is located inside the housing 1 and below the separation net 2, specifically between the separation net 2 and the first collection tray 3. The second collection tray 4 is provided with a second guide port 41.

[0079] The first end of the collection tube 6 is connected to the first guide port 31, and the second end of the collection tube 6 is connected to the second guide port 41.

[0080] In the above embodiment, the first collecting tray 3 is fixedly connected to the inner wall of the housing 1, and the first collecting tray 3 covers the entire internal cross-section of the housing 1. The second collecting tray 4 is located below the separating net 2 and at an axial position between the separating net 2 and the first collecting tray 3, and is used to collect lubricating oil that slides or drips from the surface of the separating net 2. The second collecting tray 4 is fixedly connected to the first collecting tray 3 through a collecting pipe 6.

[0081] During operation, lubricating oil adheres to the surface of the separating screen 2 and gradually coalesces into oil droplets, which then drip downwards under gravity. The second collecting plate 4 is located directly below the separating screen 2 and can effectively capture these dripping oil droplets. After the collected lubricating oil accumulates on the second collecting plate 4, it enters the collecting pipe 6 through the second guide port 41 and flows downwards along the collecting pipe 6 under gravity. It is then discharged into the housing space below the first collecting plate 3 through the first guide port 31, and finally gathers at the bottom of the housing 1 and is discharged through the second outlet 12.

[0082] In the above embodiment, the first collecting disc 3 covers the entire internal cross-section, which not only provides an installation base for the collecting pipe 6, but also straightens the airflow, reducing the risk of the separated oil being re-entrained. The collecting pipe 6 not only connects the first guide port 31 and the second guide port 41 to form a guide channel for lubricating oil, but also supports the second collecting disc 4, providing it with structural positioning and mechanical stability.

[0083] refer to Figures 4 to 5 In some embodiments, the first collecting tray 3 is provided with a first constricted portion 33 that narrows downwards, and the first guide port 31 is provided in the first constricted portion 33.

[0084] In the above embodiment, the first collecting disc 3 forms a converging funnel-shaped or conical structure, which helps the lubricating oil accumulated on the disc surface to naturally converge to the lowest point, i.e., the first constriction portion 33, under the action of gravity. Since the first guide port 31 is located at the first constriction portion 33, that is, the first guide port 31 is located at the lowest point of the first collecting disc 3, the lubricating oil can be discharged more smoothly and centrally through the first guide port 31.

[0085] In some embodiments, reference Figure 3 The first collecting plate 3 is conical in shape. Multiple fluid inlets 34 are evenly arranged along its circumference. Correspondingly, multiple guide grooves 32 are evenly distributed on the outer conical surface of the first collecting plate 3. Each guide groove 32 corresponds to one of the fluid inlets 34, and their openings are aligned axially. The separated lubricating oil enters through the fluid inlet 34, flows downward along the corresponding guide groove 32, and converges to the central region of the first collecting plate 3 under the guidance of the conical structure.

[0086] refer to Figure 2In some embodiments, the second collecting tray 4 is provided with a downwardly contracting second constriction portion, and the second guide port 41 is provided in the second constriction portion.

[0087] In the above embodiments, the second collecting disc 4 forms a converging funnel-shaped or conical structure, which helps the lubricating oil dripping from the separating net 2 and accumulating on the disc surface to converge towards the center under the action of gravity. Since the second guide port 41 is located at the second constriction, that is, the second guide port 41 is located at the lowest point of the second collecting disc 4, the oil droplets collected in the center of the second collecting disc 4 are concentrated and guided to the second guide port 41, which can reduce the oil retention on the disc surface or splashing due to airflow disturbance, and improve the continuity and reliability of oil discharge. Furthermore, the converging funnel-shaped or conical structure of the second collecting disc 4 helps to suppress the backflow of gas from the lower part of the second collecting disc 4 to the upper area of ​​the second collecting disc 4, reducing the possibility that the captured lubricating oil will be re-entrained into the main airflow.

[0088] In some embodiments, the oil-gas separator 100 further includes a cylinder 5. The bottom of the cylinder 5 is connected to a first collecting tray 3, the top of the cylinder 5 is connected to a separating net 2, and the first outlet 11 communicates with the internal space of the cylinder 5. A second collecting tray 4 and a collecting pipe 6 are located inside the cylinder 5.

[0089] In the above embodiment, the cylinder 5 is a hollow cylindrical structure with an open top. The top edge of the cylinder 5 is fixedly connected to the outer periphery of the separation net 2, and the separation net 2 can completely cover the top of the cylinder 5. This arrangement enables the separation net 2 to effectively intercept residual oil mist after passing through the spiral groove 14, and also allows the cylinder 5 to support and fix the separation net 2, thereby improving the separation net 2's resistance to airflow impact.

[0090] In some embodiments, the bottom of the cylinder 5 can be configured as a closed structure, with its bottom wall tightly fitted or fixedly connected to the first collecting tray 3. In this structure, the collecting pipe 6 passes through the through hole on the bottom wall of the cylinder 5 and is connected to the first guide port 31 located on the first collecting tray 3. When the first collecting tray 3 is provided with a downwardly contracting first constriction portion 33, the bottom wall of the cylinder 5 can be correspondingly configured as a matching funnel-shaped or conical structure to achieve surface contact and fit with the first collecting tray 3, ensuring structural stability.

[0091] In other embodiments, the bottom of the cylinder 5 can also be configured as an open structure, with the cylinder 5 sitting directly on the first collecting tray 3, and the upper surface of the first collecting tray 3 forming the bottom boundary of the cylinder 5. This structure simplifies the design while still achieving separation between the internal space of the cylinder 5 and the external oil passage area.

[0092] During operation, the mixed gas flow, after centrifugal separation by the spiral groove 14, enters the separation screen 2. Residual oil mist is intercepted and agglomerates into oil droplets due to inertia. After detaching from the separation screen 2, the oil droplets fall into the second collection tray 4 below it, then enter the collection pipe 6 through the second guide port 41, and flow downwards along the collection pipe 6 under gravity. Finally, they flow through the first guide port 31 to the bottom of the shell 1 and are discharged through the second outlet 12. Simultaneously, the refrigerant vapor purified by the separation screen 2 enters the interior of the cylinder 5, flows laterally into the cylinder 5, and is finally discharged through the first outlet 11, which communicates with the interior of the cylinder 5.

[0093] In the above embodiment, by setting the cylinder 5, not only is reliable mechanical support provided for the separation net 2, but an independent clean airflow channel is also formed, which effectively isolates the separated lubricating oil from the purified refrigerant vapor, avoids secondary entrainment, helps maintain a low exhaust oil content, and improves the operating efficiency and reliability of the entire refrigeration or compression system.

[0094] In some embodiments, the oil-gas separator 100 further includes a cooling element 7. The cooling element 7 is disposed within the housing 1 and located between the first collection tray 3 and the second outlet 12. Specifically, the cooling element 7 is located on the fluid path from the first guide port 31 to the second outlet 12. The cooling element 7 is configured to cool the fluid.

[0095] In the above embodiment, the lubricating oil, collected step by step through the spiral groove 14, the separating mesh 2, the second collecting tray 4, and the collecting pipe 6, finally flows into the bottom area of ​​the housing 1 through the first guide port 31. The cooling component 7 cools the lubricating oil discharged from the first guide port 31. As the lubricating oil flows through the cooling component 7, some of the heat is carried away through heat exchange, thereby reducing the oil temperature. This cooling effect helps to improve the viscosity stability of the lubricating oil and improve its lubrication performance after it flows back to the compressor.

[0096] In some embodiments, the cooling element 7 may be a coil 73, with refrigerant flowing inside the coil 73 and its outer surface in direct or indirect contact with lubricating oil to achieve heat exchange.

[0097] refer to Figure 1 and Figure 2 In some embodiments, the oil-gas separator 100 further includes a guide member 8. The guide member 8 is disposed inside the housing 1 and is located between the inlet 13 and the spiral groove 14.

[0098] refer to Figure 6 The guide member 8 includes a support part 81 and a plurality of guide vanes 82. The first end of the guide vane 82 is connected to the support part 81, and the second end of the guide vane 82 is connected to the inner wall of the housing 1. The overall distribution is radial.

[0099] In the above embodiment, the guide member 8 is used to initially rectify and circumferentially accelerate the mixed airflow entering from the inlet 13. When the mixed airflow of refrigerant vapor and lubricating oil mist enters the housing 1, it first impacts the guide vanes 82 of the guide member 8. Under the action of the inclined surface of the guide vanes 82, the airflow is given initial rotational momentum and smoothly transitions to the downstream spiral groove 14 in a predetermined direction. This process helps to reduce airflow turbulence and the generation of local eddies, allowing the mixed airflow to enter the spiral groove 14 more uniformly and stably, thereby improving the efficiency of the subsequent centrifugal separation stage.

[0100] In some embodiments, the guide vanes 82 of the guide member 8 are typically 6 to 12. If the number of guide vanes 82 is too small, the airflow cannot be rectified and guided to form a stable spiral motion; if the number of guide vanes 82 is too large, it will increase the resistance of the airflow channel, resulting in excessive pressure drop and affecting system efficiency. (Reference) Figure 8 The angle b between the guide vane 82 and the horizontal line is preferably between 30 and 50 degrees. This angle range can improve the airflow guidance effect while taking into account low flow resistance, which helps to form a uniform and stable vortex at the inlet of the spiral groove 14, thereby improving the efficiency of subsequent centrifugal separation.

[0101] According to the descriptions of the above embodiments, the working process of the oil-gas separator is as follows:

[0102] The mixed fluid (mainly including gaseous refrigerant and entrained lubricating oil mist) enters the housing 1 through inlet 13 at the top of the housing 1. The mixed airflow first passes through guide member 8 for preliminary rectification and is guided into the spiral groove 14 in a predetermined direction. Subsequently, the airflow spirals inside the housing 1 under the guidance of the spiral groove 14. During this process, because the density of the lubricating oil mist is greater than that of the gaseous refrigerant, under the action of centrifugal force, most of the oil mist particles are thrown towards the inner wall of the housing and gradually coalesce into droplets, flowing downwards along the inner wall.

[0103] The airflow, initially separated by the spiral groove 14, continues downward, passing through the separation mesh 2 located below it. The separation mesh 2 is composed of a porous or wire mesh structure. When the airflow passes through, the residual fine oil mist, due to inertia, is unable to bypass the mesh wires with the airflow, thus impacting and adhering to the mesh surface, further coalescing into oil droplets. These oil droplets drip from the bottom of the separation mesh 2 under the action of gravity and are captured by the second collection tray 4 located directly below it.

[0104] The second collecting tray 4 has a downward-contracting second constriction, and a second guide port 41 is opened at its bottom. The collected lubricating oil flows into the second guide port 41 under the convergence of the second constriction and is guided downward through the collecting pipe 6 connected thereto. The other end of the collecting pipe 6 is connected to the first guide port 31 of the first collecting tray 3, which not only realizes the directional delivery of oil, but also provides structural support for the second collecting tray 4.

[0105] The first collecting tray 3 is located between the first outlet 11 and the second outlet 12, covering the entire internal cross-section of the housing 1. Multiple fluid inlets 34 are formed between the outer edge of the first collecting tray 3 and the inner wall of the housing 1. Liquid lubricating oil separated by the spiral groove 14 flows downwards along the inner wall of the housing 1 and can enter the lower space of the first collecting tray 3 through the fluid inlets 34. Because the first collecting tray 3 has a downwardly contracting first constriction 33, the liquid lubricating oil converges towards the first constriction 33 along the guide groove 32 on the lower surface of the first collecting tray 3. Simultaneously, some lubricating oil is discharged into the first guide port 31 through the collecting pipe 6.

[0106] The lubricating oil collected by the first collecting tray 3 falls into the bottom area of ​​the shell 1 and flows through the cooling element 7 located in that area. The cooling element 7 is arranged on the oil discharge path from the first guide port 31 to the second outlet 12, and can be in the form of a built-in cooling coil, etc., to effectively reduce the temperature of the lubricating oil through heat exchange. At the same time, the clean refrigerant vapor after oil mist separation no longer carries a large amount of lubricating oil, flows inside the cylinder 5, and is discharged through the first outlet 11.

[0107] In summary, the oil-gas separation device 100 achieves initial rectification and guidance through the guide member 8, centrifugal separation through the spiral groove 14, inertial collision interception through the separation net 2, and orderly collection and directional discharge of lubricating oil through a multi-stage collection structure (second collection plate 4, collection pipe 6, and first collection plate 3). Simultaneously, a cooling component 7 is integrated at the end of the oil discharge path to cool the recovered lubricating oil. Therefore, it not only effectively reduces the oil content in the refrigerant vapor, preventing lubricating oil from entering the evaporator and causing a decrease in heat exchange performance, but also improves the stability of lubricating oil return.

[0108] The oil-gas separator 100 can be installed on the refrigerant pipeline between the compressor and the condenser. It can efficiently recover and cool the lubricating oil before it enters the evaporator, which helps to improve the reliability of the lubrication system, extend the service life of the compressor, and ensure the long-term stable operation of the whole machine.

[0109] refer to Figure 9 Some embodiments of this disclosure also provide a refrigeration system, which specifically includes: a compressor 10, a first heat exchanger 20, a second heat exchanger 30, and the aforementioned oil-gas separator 100.

[0110] The exhaust port of the compressor 10 is connected to the inlet 13 of the oil-gas separator 100, the first outlet 11 of the oil-gas separator 100 is connected to the first heat exchanger 20, the first heat exchanger 20 is connected to the second heat exchanger 30, and the second heat exchanger 30 is connected to the air inlet of the compressor 10.

[0111] The first heat exchanger 20 includes a condenser. The second heat exchanger 30 includes an evaporator.

[0112] Since the high-temperature and high-pressure refrigerant gas discharged from the compressor 10 usually carries some lubricating oil, if it is not separated, this lubricating oil will enter the condenser, throttling device and evaporator along with the refrigerant. This will not only reduce the heat exchange efficiency, but may also cause the compressor to have poor lubrication due to insufficient oil return, affecting its reliability and lifespan.

[0113] Based on this, by providing the oil-gas separation device 100 between the exhaust side of the compressor 10 and the condenser (i.e., the first heat exchanger 20), the present embodiment can efficiently separate and recover most of the lubricating oil from the gaseous refrigerant before the refrigerant enters the heat exchange system.

[0114] Specifically, after the mixed gas flow passes through the oil-gas separator 100, the clean refrigerant vapor enters the first heat exchanger 20 from the first outlet 11 for condensation, while the separated lubricating oil is collected through an internal multi-stage collection structure, cooled by the cooling element 7, and then returned to the lubrication circuit of the compressor 10 from the second outlet 12. This process effectively reduces the accumulation of lubricating oil in the condenser and evaporator, maintaining the heat transfer performance of the heat exchanger; at the same time, the cooled lubricating oil has a lower temperature and more stable viscosity, which helps to improve the compressor's lubrication effect and operational reliability.

[0115] Furthermore, because the oil-gas separator 100 integrates centrifugal separation, inertial collision interception, multi-stage oil diversion, and terminal cooling functions, its overall structure is compact and easily integrated into existing refrigeration circulation pipelines, eliminating the need for additional complex oil return mechanisms. Therefore, this refrigeration system not only achieves efficient oil-gas recovery and thermal management but also improves overall energy efficiency, operational stability, and long-term reliability.

[0116] The oil-gas separation device 100 provided in this embodiment is suitable for high-temperature heat pump centrifuge systems. It can effectively address the problem of difficult lubricant recovery caused by high temperature, high pressure and high flow rate. While ensuring sufficient lubrication of the compressor, it reduces the accumulation of lubricant in the condenser and evaporator, and maintains the long-term efficient and stable operation of the system.

[0117] In some embodiments, the refrigeration system further includes a first throttling valve 91, which is disposed on the main refrigerant pipeline between the first heat exchanger 20 and the second heat exchanger 30. The first throttling valve 91 is the main liquid circuit throttling valve.

[0118] In the above embodiment, the first throttling valve 91 is used to throttle and reduce the pressure of the high-pressure liquid refrigerant flowing out of the first heat exchanger 20 (i.e., condenser), so that it is transformed into a low-temperature and low-pressure gas-liquid two-phase flow, which then enters the second heat exchanger 30 (i.e., evaporator) to absorb heat and evaporate, thus completing the refrigeration cycle process.

[0119] In some embodiments, the first throttle valve 91 may be in the form of an electronic expansion valve or a fixed throttle orifice, which can adjust the opening degree according to the system load or pressure signal to control the refrigerant flow rate into the evaporator.

[0120] In some embodiments, the refrigeration system further includes an oil tank 40. The oil tank 40 is connected to the second outlet 12 of the oil-gas separator 100 and the oil supply port of the compressor 10.

[0121] In the above embodiment, the oil tank 40 is used to store lubricating oil, and can perform temperature equalization on the recovered lubricating oil, and form an oil supply circuit with the compressor 10 to provide the compressor 10 with continuous and stable lubricating oil.

[0122] In some embodiments, a return valve 93 is provided on the pipeline between the second outlet 12 of the oil-gas separator 100 and the oil tank 40. Optionally, the return valve 93 is a solenoid valve. The return valve 93 is used to control the opening and closing of the lubricating oil return path from the oil-gas separator 100 to the oil tank 40. When the system is operating normally and sufficient lubricating oil has accumulated in the oil-gas separator 100, the return valve 93 opens, allowing the recovered lubricating oil to flow smoothly into the oil tank 40.

[0123] In some embodiments, a pump 70 is provided on the oil supply line between the oil tank 40 and the compressor 10. The pump 70 provides active oil supply power, pressurizing and delivering the lubricating oil stored in the oil tank 40 to the lubrication points of the compressor 10 (such as bearings, gears, or motor cooling channels), ensuring a stable and sufficient supply of lubricating oil to the compressor during startup, high load, or high temperature conditions. Simultaneously, the compressor 10 is also connected to the oil tank 40 via a return oil line, forming a circulation path for the lubricating oil. This return oil line collects lubricating oil that is not fully utilized inside the compressor or is thrown out from moving parts and guides it back to the oil tank 40, preventing lubricating oil from accumulating in the compression chamber or motor chamber, thereby maintaining the oil level balance inside the compressor and preventing oil interference with normal operation.

[0124] In some embodiments, the refrigeration system further includes an ejector 50. A first interface of the ejector 50 is connected to a first heat exchanger 20, a second interface of the ejector 50 is connected to a second heat exchanger 30, and a third interface of the ejector 50 is connected to an oil tank 40.

[0125] In actual operation, although the main oil-gas separator 100 has efficiently recovered most of the lubricating oil on the compressor discharge side, a small amount of lubricating oil may still enter the evaporator with the refrigerant circulation and accumulate. If it is not recovered in time, it will not only reduce the heat exchange efficiency of the evaporator, but may also lead to insufficient oil return during long-term compressor operation.

[0126] In the above embodiment, the ejector 50 uses the high-pressure gaseous refrigerant flowing from the first heat exchanger 20 (i.e., the condenser) as the working fluid. This fluid is accelerated through its nozzle to form a high-speed jet, creating a negative pressure within the ejector chamber. This draws in any refrigerant-lubricating oil mixture (typically a low-pressure gas-liquid two-phase flow) that may be retained in the second heat exchanger 30 (i.e., the evaporator) through the second port. After mixing with the high-pressure working fluid, the mixture is discharged into the oil tank 40 through the third port. This configuration enables the active recovery of residual lubricating oil in low-temperature components such as the evaporator. The ejector 50 requires no additional power; it relies solely on the pressure difference of the system's own high-pressure refrigerant to drive the lubricating oil return flow. It features a simple structure, no moving parts, and high reliability.

[0127] In some embodiments, the refrigeration system further includes a balance pipe 60. One end of the balance pipe 60 is connected to the oil tank 40, and the other end of the balance pipe 60 is connected to a pipeline located between the second heat exchanger 30 and the compressor 10.

[0128] In the above embodiment, the balance pipe 60 is used to connect the oil tank 40 with the low-pressure side of the refrigeration system, namely the second heat exchanger 30 and the compressor 10. Its main function is to achieve a balance between the gas phase space inside the oil tank 40 and the system suction pressure. Through this balance, the oil tank 40 is prevented from obstructing the return flow of lubricating oil due to increased internal pressure. At the same time, it helps the refrigerant vapor entrained in the oil tank 40 to return to the low-pressure circulation pipeline, avoiding the accumulation of refrigerant in the oil tank 40, which affects the performance of the lubricating oil and the stability of the oil supply, thereby ensuring the reliable operation of the lubrication system.

[0129] In some embodiments, the oil-gas separator 100 further includes a cooling element 7, which is disposed inside the housing 1 and located on the fluid path from the first constriction 33 or the first guide port 31 to the second outlet 12. The cooling element 7 includes a coil 73, the refrigerant inlet of the coil 73 is connected to the first heat exchanger 20, and the refrigerant outlet of the coil 73 is connected to the second heat exchanger 30.

[0130] During operation, the lubricating oil discharged from the first constriction 33 or the first guide port 31 flows over the outer surface of the cooling component 7, while the low-temperature, high-pressure refrigerant from the first heat exchanger 20 flows inside the coil. The two exchange heat through the pipe wall. Since the refrigerant has a lower temperature and higher density before throttling, it can absorb heat from the lubricating oil as a cooling medium, thus reducing the lubricating oil temperature.

[0131] In the above embodiments, the refrigerant in the refrigeration cycle of the refrigeration system itself is used as the cooling medium, eliminating the need for an additional cooling circuit. The structure is compact and energy-efficient. The recovered lubricating oil is cooled down, resulting in more stable viscosity and enhanced fluidity, which is beneficial for pumping and compressor lubrication.

[0132] In some embodiments, a second throttling valve 92 is provided on the pipeline between the refrigerant inlet of the coil 73 and the first heat exchanger 20.

[0133] In the above embodiment, the second throttle valve 92 is used to partially throttle and reduce the pressure of the high-pressure liquid refrigerant drawn from the first heat exchanger 20 (i.e., the condenser) and entering the cooling coil 73, so that it is transformed into a low-temperature, low-pressure gas-liquid two-phase state before entering the coil 73; the temperature of the refrigerant after throttling is significantly reduced, and the temperature difference between it and the high-temperature lubricating oil increases, thereby improving the heat exchange efficiency and making the lubricating oil cooler more fully; and by adjusting the opening of the second throttle valve 92 (such as by using an electronic expansion valve), the flow rate of the refrigerant entering the coil 73 can be dynamically controlled according to the compressor exhaust temperature or oil temperature.

[0134] In some embodiments, the refrigerant inlet of coil 73 is connected to the first heat exchanger 20 via a first pipe 71, and the refrigerant outlet of coil 73 is connected to the second heat exchanger 30 via a second pipe 72.

[0135] The following is in conjunction with the appendix Figures 1 to 9 The following describes in detail some specific embodiments of the oil-gas separation device 100 and the refrigeration system.

[0136] During the operation of the refrigeration system, the lubricating oil in the oil tank 40 is pressurized by the lubricating oil pump 70 and supplied to the compressor 10 for lubrication, carrying away the generated heat, and then returns to the oil tank 40, forming a closed lubrication cycle. However, due to the small clearance between the bearing and the shaft, the comb-tooth seal structure, and the fit clearance between the shaft and the impeller, some lubricating oil will inevitably leak into the refrigerant flow channel and enter the refrigeration cycle with the refrigerant.

[0137] Since the liquid refrigerant in the second heat exchanger 30 (i.e., the evaporator) absorbs heat and evaporates into a gaseous state, while the lubricating oil cannot evaporate and its density is usually lower than that of the liquid refrigerant, the lubricating oil that leaks into the refrigeration system will eventually accumulate on the upper surface of the liquid refrigerant in the second heat exchanger 30.

[0138] To address this issue, this embodiment employs an ejector method to recover lubricating oil: high-pressure gaseous refrigerant is drawn from the first heat exchanger 20 (i.e., the condenser) and fed into the main inlet of the ejector 50 as the working fluid; simultaneously, a mixture of refrigerant and lubricating oil is drawn from the liquid surface of the second heat exchanger 30 and fed into the ejector inlet of the ejector 50. Inside the ejector 50, the high-speed, high-pressure airflow from the first heat exchanger 20 generates a negative pressure, which ejects the refrigerant and lubricating oil mixture taken from the second heat exchanger 30 to the oil tank 40, thus achieving lubricating oil recovery.

[0139] However, due to the higher inlet and outlet water temperatures of the second heat exchanger 30, its internal pressure increases significantly. Simultaneously, the balance pipe 60 connects one end to the oil tank 40 and the other end to the low-pressure pipeline between the second heat exchanger 30 and the compressor 10. Due to structural limitations of the balance pipe 60 (such as pipe diameter and routing), it experiences a flow pressure drop of approximately 20 kPa to 30 kPa, meaning the actual pressure inside the oil tank 40 may be higher than the internal pressure of the second heat exchanger 30. Furthermore, the first heat exchanger 20 also experiences higher refrigerant pressure due to its higher inlet / outlet water temperatures. The high-pressure gas discharged into the oil tank 40 via the ejector 50 also struggles to be discharged promptly through the balance pipe 60, further increasing the pressure inside the oil tank 40. This increased pressure in the oil tank 40 leads to increased outlet resistance of the ejector 50, resulting in insufficient ejection power. In severe cases, this can cause a significant decrease in ejection efficiency or even failure, preventing the timely recovery of lubricating oil accumulated in the evaporator. Consequently, it affects the integrity of the lubrication cycle and the long-term reliability of the compressor and the entire unit.

[0140] Therefore, in this embodiment, an oil-gas separator 100 is added between the compressor 10 and the first heat exchanger 20. This device utilizes the principles of centrifugal separation and inertial collision to efficiently intercept and recover the lubricating oil before it enters the evaporator. Simultaneously, high-pressure liquid refrigerant is drawn from the bottom of the first heat exchanger 20, throttled and cooled by the second throttling valve 92, and then introduced into the cooling coil 73 within the oil-gas separator 100 to cool the separated high-temperature lubricating oil. The refrigerant, after absorbing heat, returns to the second heat exchanger 30 in gaseous form to participate in the main circulation. The bottom of the oil-gas separator 100 is connected to the oil tank 40 through the second outlet 12, stably returning the recovered lubricating oil to the lubrication system.

[0141] With the above settings, the oil-gas separator 100 can recover most of the lubricating oil before it enters the evaporator, which improves the recovery efficiency, significantly reduces the burden on the ejector return path, effectively alleviates the risk of ejector failure caused by excessive back pressure in the oil tank, and thus greatly improves the reliability of lubricating oil management, making the system stable, reliable and efficient.

[0142] refer to Figures 1 to 9In some specific embodiments, the oil-gas separator 100 has the following structure: The oil-gas separator 100 includes a housing 1. An inlet 13 is provided at the top of the housing 1. A guide member 8 is welded to the upper inner wall of the housing 1 to guide the airflow direction. Below the guide member 8, a spiral groove 14 is machined on the inner wall of the housing 1. This spiral groove 14 is a continuous spiral groove used to form a swirling flow of the mixed airflow, achieving preliminary centrifugal separation. Below the spiral groove 14, a cylinder 5 is provided. The cylinder 5 is a hollow cylindrical structure, and a conical separation net 2 is installed at its upper end. The separation net 2 is woven from steel wire. The lower end of the cylinder 5 is connected to a first collecting tray 3. The outer edge of the first collecting tray 3 is fixed to the inner wall of the housing 1 and covers the entire cross-section. The first collecting tray 3 has a downwardly contracting first constriction portion 33, and a first guide port 31 is opened at the first constriction portion 33. The middle of the first collecting tray 3 is connected to a collecting pipe 6 through the first guide port 31. The collecting pipe 6 extends upward and connects to a second collecting tray 4 located below the separation net 2. The second collecting tray 4 has a second constriction and a second guide port 41 for collecting oil droplets dripping from the separating net 2. A cooling component 7 is located below the first collecting tray 3, comprising a coil 73. Both ends of the coil 73 are connected to the refrigeration system via a first pipe 71 and a second pipe 72, respectively: the first pipe 71 connects to the bottom of the first heat exchanger 20 via a second throttle valve 92, introducing high-pressure liquid refrigerant; the second pipe 72 connects to the inlet of the second heat exchanger 30, discharging the gaseous refrigerant after heat absorption. A first outlet 11 is located on the side wall of the shell 1, communicating with the interior of the cylinder 5, for discharging clean refrigerant; a second outlet 12 is located at the bottom of the shell 1, communicating with the oil tank 40, for discharging cooled lubricating oil.

[0143] The specific working process of the oil-gas separator 100 is as follows:

[0144] The high-temperature, high-pressure, high-speed mixed airflow (containing refrigerant vapor and lubricating oil mist) from the exhaust port of compressor 10 enters the oil-gas separator 100 through inlet 13. The airflow is first guided by guide member 8 and flows downward in a stable spiral. As the airflow rotates downward along the inner wall of the housing 1, due to the much higher density of lubricating oil mist than refrigerant vapor, most of the oil mist is thrown towards the inner wall of the housing 1 under the action of centrifugal force and gradually coalesces into liquid oil droplets. Under the combined action of gravity and spiral groove 14, these oil droplets flow downward along the annular flow channel between the housing 1 and the cylinder 5 and fall into the first collection tray 3.

[0145] Then, the lubricating oil enters the lower surface of the first collecting plate 3 through multiple fluid inlets 34 formed between the first collecting plate 3 and the inner wall of the housing 1. Guided by the guide grooves 32 provided on the lower surface of the first collecting plate 3, the lubricating oil gathers towards the central area and finally accumulates at the first constriction 33 at the bottom of the first collecting plate 3.

[0146] The mixed gas stream after centrifugal separation still contains some fine oil mist. This gas stream continues downward through the conical separation net 2 located at the upper end of the cylinder 5. The separation net 2 is woven from steel wire and has a high specific surface area and complex flow channels. When the oil mist-containing gas stream passes through, under the action of inertia, the oil droplets are difficult to bypass the wires with the gas stream, thus colliding with and adhering to the net surface. The oil droplets gradually gather on the surface of the separation net 2 and flow downward along the conical net surface under the action of gravity, eventually dripping into the second collection tray 4 located below it.

[0147] The second collecting pan 4 guides the collected lubricating oil through its central second guide port 41 into the collecting pipe 6. The lubricating oil is then transported downwards through the collecting pipe 6 to the bottom of the first collecting pan 3, where it merges with the lubricating oil obtained through centrifugal separation and accumulates together at the bottom of the oil-gas separator 100. At the same time, the clean airflow (with a small amount of residual oil mist) after oil mist interception flows out from the flow channel between the second collecting pan 4 and the cylinder 5, and is discharged through the first outlet 11 on the side wall of the shell 1, entering the first heat exchanger 20 (i.e., the condenser) to continue participating in the refrigeration cycle.

[0148] High-pressure liquid refrigerant is drawn from the bottom of the first heat exchanger 20, throttled and depressurized by the second throttling valve 92, and then sent to the cooling element 7 (such as a coil structure) located at the bottom of the oil-gas separator 100. This low-temperature refrigerant flows inside the cooling element 7, exchanging heat with the external high-temperature lubricating oil, effectively reducing the lubricating oil temperature. The refrigerant, after absorbing heat, vaporizes and returns through pipelines to the second heat exchanger 30 (i.e., the evaporator), rejoining the main refrigeration cycle.

[0149] After cooling, the lubricating oil accumulates at the bottom of the oil-gas separator 100 and flows out through the second outlet 12 under the drive of the system pressure difference. The outflowing lubricating oil enters the return oil pipeline through the return oil valve 93 and finally returns to the oil tank 40. The return oil valve 93 can be opened periodically by the controller at preset time intervals to achieve timed and quantitative oil return, which not only avoids excessive pressure fluctuations in the oil tank but also ensures that the compressor lubrication system continuously receives a stable oil source.

[0150] Some embodiments of this application also provide an air conditioner that includes the refrigeration system described above.

[0151] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0152] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. An oil-gas separation device, characterized in that, include: A housing (1) has an inlet (13), a first outlet (11), and a second outlet (12) arranged vertically from top to bottom. The inner wall of the housing (1) has a spiral groove (14) located between the inlet (13) and the first outlet (11). The separation net (2) is located inside the housing (1) and between the spiral groove (14) and the first outlet (11).

2. The oil-gas separation device according to claim 1, characterized in that, The separation net (2) is constructed as a downwardly concave net.

3. The oil-gas separation device according to claim 1, characterized in that, Also includes: The first collecting tray (3) is disposed inside the housing (1) and located between the first outlet (11) and the second outlet (12). Multiple fluid inlets (34) are formed between the outer edge of the first collecting tray (3) and the inner wall of the housing (1). Multiple guide grooves (32) are provided on the lower surface of the first collecting tray (3). The first end of each guide groove (32) is connected to a fluid inlet (34), and the second end of the guide groove (32) extends to the middle region of the first collecting tray (3).

4. The oil-gas separation device according to claim 3, characterized in that, The first collection tray (3) is provided with a first constricted opening (33) that narrows downwards, and the first constricted opening (33) is located in the middle region of the first collection tray (3).

5. The oil-gas separation device according to claim 1, characterized in that, Also includes: The first collection tray (3) is fixedly connected to the inner wall of the housing (1) and is located between the first outlet (11) and the second outlet (12). The first collection tray (3) is provided with a first guide port (31). The second collection tray (4) is located below the separation net (2), and the second collection tray (4) is provided with a second guide port (41); and The collection tube (6) has its first end connected to the first guide port (31) and its second end connected to the second guide port (41).

6. The oil-gas separation device according to claim 5, characterized in that, The first collecting tray (3) is provided with a downwardly constricted first constriction portion (33), and the first guide port (31) is provided at the first constriction portion (33); and / or The second collecting tray (4) is provided with a second constricted section that narrows downwards, and the second guide port (41) is provided in the second constricted section.

7. The oil-gas separation device according to claim 5, characterized in that, Also includes: The cylinder (5) is connected at its bottom to the first collection tray (3) and at its top to the separation net (2). The first outlet (11) is connected to the internal space of the cylinder (5). The second collection tray (4) and the collection pipe (6) are located inside the cylinder (5).

8. The oil-gas separation device according to any one of claims 3 to 7, characterized in that, Also includes: A cooling element (7), disposed within the housing (1) and located between the first collection plate (3) and the second outlet (12), is configured to cool the fluid.

9. The oil-gas separation device according to claim 1, characterized in that, It also includes a guide (8), which is disposed inside the housing (1) and located between the inlet (13) and the spiral groove (14); the guide (8) includes a support (81) and a plurality of guide vanes (82), the first end of the guide vane (82) is connected to the support (81), and the second end of the guide vane (82) is connected to the inner wall of the housing (1).

10. A refrigeration system, characterized in that, include: The compressor (10), the first heat exchanger (20), the second heat exchanger (30), and the oil-gas separation device according to any one of claims 1 to 9; The exhaust port of the compressor (10) is connected to the inlet (13) of the oil-gas separator, the first outlet (11) of the oil-gas separator is connected to the first heat exchanger (20), the first heat exchanger (20) is connected to the second heat exchanger (30), and the second heat exchanger (30) is connected to the air inlet of the compressor (10).

11. The refrigeration system according to claim 10, characterized in that, Also includes: The oil tank (40) is connected to the second outlet (12) of the oil-gas separator and the oil supply port of the compressor (10).

12. The refrigeration system according to claim 11, characterized in that, Also includes: The ejector (50) has a first interface connected to the first heat exchanger (20), a second interface connected to the second heat exchanger (30), and a third interface connected to the oil tank (40).

13. The refrigeration system according to claim 12, characterized in that, Also includes: The balance pipe (60) has one end connected to the oil tank (40) and the other end connected to the pipeline located between the second heat exchanger (30) and the compressor (10).

14. The refrigeration system according to claim 10, characterized in that, The oil-gas separation device also includes a cooling component (7) disposed in the housing (1); the cooling component (7) includes a coil (73), the refrigerant inlet of the coil (73) is connected to the first heat exchanger (20), and the refrigerant outlet of the coil (73) is connected to the second heat exchanger (30).

15. An air conditioner, characterized in that, Includes the refrigeration system according to any one of claims 10 to 14.

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