Oil-liquid separator of rotary compressor and rotary compressor

Abstract

The utility model relates to the technical field of compressors, and discloses an oil-liquid separator of a rotary compressor and the rotary compressor, the oil-liquid separator comprises a separator main body, and the separator main body is arranged on the outer side of a power output shaft of a motor in a sleeving manner; the oil baffle plate is annularly arranged on the outer peripheral wall of the separator main body, and the oil baffle plate is provided with a communication port opposite to the port of the fluid channel; and the driving blades extend in the circumferential direction of the oil-liquid separator, included angles are formed between the driving blades and the oil baffle plates, and when the driving blades are impacted by the oil-gas mixture in the fluid channel, the driving blades rotate so as to drive the separator body to drive the power output shaft to rotate. Therefore, the oil-gas mixture is utilized to impact the driving blade to drive the oil-liquid separator to drive the power output shaft to rotate, the kinetic energy of the oil-gas mixture can be converted into the kinetic energy of the power output shaft, and compared with the prior art, the energy utilization rate in the rotary compressor can be improved, so that the energy consumption of the rotary compressor can be reduced.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and in particular to an oil separator for a rotary compressor and a rotary compressor having the oil separator of the rotary compressor. Background Technology

[0002] Rotary compressors are used to compress gaseous media and are widely used in various types of gas systems and refrigeration systems. Inside the casing of a rotary compressor, the compressor core draws in lubricating oil when compressing the gaseous media. The lubricating oil mixes with the gaseous media to form an oil-gas mixture. In order to prevent the lubricating oil from entering the gas system or refrigeration system and affecting the system's working efficiency, and to ensure that there is enough lubricating oil in the rotary compressor to lubricate the various components of the rotary compressor, the rotary compressor needs to use an oil separator to separate the oil-gas mixture back into gaseous media and oil before the oil-gas mixture is discharged from the exhaust port on the casing.

[0003] Currently, in some existing technical solutions, the oil separator has an oil baffle. When the oil-gas mixture flowing towards the exhaust port hits the oil baffle, the flow velocity of the oil-gas mixture decreases. The heavier oil droplets in the oil-gas mixture are separated from the mixture under their own gravity. This separation method increases the compressor's exhaust loss and cannot effectively utilize the kinetic energy of the oil-gas mixture, resulting in low energy utilization of the rotary compressor and thus causing serious energy consumption of the rotary compressor.

[0004] In some other existing technical solutions, the oil separator has an oil baffle and separation blades. The separation blades are vertically mounted on the baffle. The oil separator is driven to rotate by the power output shaft of the rotary compressor motor. The separation blades can agitate the oil-gas mixture, causing it to flow radially along the oil separator under centrifugal force. Under centrifugal force, the oil-gas mixture is separated into gas and oil. This separation method has a better separation effect, but the motor needs to provide additional power to the oil separator to overcome the fluid resistance of the surrounding oil-gas mixture when the separator rotates. This not only fails to utilize the kinetic energy of the oil-gas mixture but also further increases the energy consumption of the rotary compressor. Utility Model Content

[0005] The purpose of this application is to improve the energy utilization rate within a rotary compressor, thereby reducing the energy consumption of the rotary compressor.

[0006] To achieve the above objectives, this application provides an oil separator for a rotary compressor.

[0007] This application further proposes a rotary compressor.

[0008] According to the oil separator of the rotary compressor of this application, the rotary compressor further includes a motor, a compression mechanism, and a housing. The oil separator is installed on the motor, and the compression mechanism is drivenly connected to the motor. The motor, the compression mechanism, and the oil separator are all disposed within the housing. The oil separator includes: a separator body adapted to be sleeved on the outside of the power output shaft of the motor and connected to the power output shaft; and an oil baffle plate circumferentially disposed on the outer peripheral wall of the separator body and extending radially outward along the separator body. The oil baffle plate is located between the exhaust port of the housing and the fluid channel circumferentially outward of the power output shaft, and / or the oil baffle plate is located between the compression mechanism and the fluid channel, and the oil baffle plate has a communication port. The connecting port is positioned opposite to the port of the fluid channel; a drive blade is present, one end of which is connected to the side wall of the connecting port, and the other end extends circumferentially along the oil separator. The drive blade and the oil baffle have an angle between them, and the drive blade and the oil baffle are not perpendicular to each other. Along the axial direction of the oil separator, the drive blade at least partially blocks the connecting port. A flow channel communicating with the connecting port is formed between the drive blade and the oil baffle. When the drive blade is impacted by the oil-gas mixture in the fluid channel, the drive blade separates the oil-gas mixture into a gas medium and oil. The drive blade rotates around the central axis of the oil separator to drive the separator body to drive the power output shaft to rotate around the central axis of the power output shaft.

[0009] The oil-liquid separator of the rotary compressor according to this application utilizes the impact of the oil-gas mixture on the drive blades to drive the oil-liquid separator to rotate the power output shaft. This allows the kinetic energy of the oil-gas mixture to be converted into the kinetic energy of the power output shaft. Furthermore, when the kinetic energy of the oil-gas mixture decreases, the flow rate of the oil-gas mixture can be reduced, thereby separating the gas medium from the oil in the oil-gas mixture. Compared with the prior art, this allows the energy of the oil-gas mixture to be fully utilized, improving the energy utilization rate within the rotary compressor and thus reducing the energy consumption of the rotary compressor.

[0010] In some examples of this application, the drive blade has a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall. The first sidewall is fixedly connected to the sidewall of the communication port. The second sidewall is spaced apart from the first sidewall along the circumference of the oil separator. The third and fourth sidewalls are both adjacent to the first sidewall and also adjacent to the second sidewall. The third and fourth sidewalls are spaced apart along the radial direction of the oil separator. At least one of the second, third, and fourth sidewalls is planar, or at least one of the second, third, and fourth sidewalls is arc-shaped.

[0011] In some examples of this application, along the radial direction of the oil separator, the third sidewall is located inside the fourth sidewall, the length of the third sidewall is smaller than the length of the fourth sidewall, and the second sidewall is obliquely connected between the third sidewall and the fourth sidewall.

[0012] In some examples of this application, the drive blade has a guide surface facing the port, the guide surface being either planar or arc-shaped.

[0013] In some examples of this application, the oil baffle is provided with a plurality of communication ports, which are evenly spaced apart along the circumference of the oil baffle, and the driving blades are correspondingly provided with a plurality of them, with any two driving blades having the same structural dimensions.

[0014] In some examples of this application, along the axial direction of the rotary compressor, the drive blades are folded toward the side of the oil baffle closer to the exhaust port, or the drive blades are folded toward the side of the oil baffle closer to the compression mechanism, and / or the drive blades are folded toward the side of the oil baffle closer to the corresponding port.

[0015] In some examples of this application, the folding angle of the drive blade relative to the oil baffle is α, where α satisfies the relationship: 0 < α < 45°.

[0016] In some examples of this application, the oil baffle and the drive blade are constructed as a single integral part.

[0017] In some examples of this application, a guide arc surface is provided between the oil baffle and the drive blade on the side of the oil separator opposite to the port.

[0018] The rotary compressor according to this application includes: a housing having an exhaust port; a motor disposed within the housing, the motor having a power output shaft, a fluid channel circumferentially distributed on the outer side of the power output shaft, and ports at both ends along the axial direction of the motor, the fluid channel being used to guide an oil-gas mixture; a compression mechanism drivingly connected to the motor, the compression mechanism being located on the side of the motor away from the exhaust port; and an oil separator disposed within the housing and mounted on the power output shaft, the oil separator being located between the exhaust port and the opposite port, and / or, the oil separator being located between the compression mechanism and the opposite port, the oil separator being the oil separator of the aforementioned rotary compressor.

[0019] According to the rotary compressor of this application, an oil-liquid separator is provided inside the rotary compressor. By setting drive blades on the oil baffle plate of the oil-liquid separator and making an angle between the drive blades and the oil baffle plate, when the oil-gas mixture impacts the drive blades, the oil-gas mixture can drive the oil-liquid separator to rotate the power output shaft. This can convert the kinetic energy of the oil-gas mixture into the kinetic energy of the power output shaft. When the kinetic energy of the oil-gas mixture decreases, the flow rate of the oil-gas mixture can be reduced, thereby separating the gas medium from the oil in the oil-gas mixture. Compared with the prior art, the energy of the oil-gas mixture can be fully utilized, the energy utilization rate inside the rotary compressor can be improved, and the energy consumption of the rotary compressor can be reduced. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a first embodiment of the oil separator of this application;

[0021] Figure 2 This is a front view of a first embodiment of the oil separator according to this application;

[0022] Figure 3 This is a cross-sectional view of a first embodiment of the oil separator of this application;

[0023] Figure 4 This is a schematic diagram of a second embodiment of the oil separator according to the present application;

[0024] Figure 5 This is a front view of a second embodiment of the oil separator according to this application.

[0025] Figure 6 This is a schematic diagram of a third embodiment of the oil separator of this application;

[0026] Figure 7 This is a front view of a third embodiment of the oil separator according to this application;

[0027] Figure 8 This is a cross-sectional view of a first embodiment of the rotary compressor of this application;

[0028] Figure 9 This is a cross-sectional view of a second embodiment of the rotary compressor of this application;

[0029] Figure 10 This is a cross-sectional view of a third embodiment of the rotary compressor of this application;

[0030] Figure 11 This is a top view of the rotary compressor according to an embodiment of this application after part of the casing has been removed.

[0031] In the diagram, 100 is a rotary compressor; 110 is a motor; 111 is a power take-off shaft; 120 is the casing; 121 is the exhaust port; 130 is the fluid passage; 131 is the rotor through hole; 132 is the stator-rotor clearance; and 140 is the compression mechanism.

[0032] 200. Oil separator;

[0033] 1. Separator body; 2. Oil baffle; 21. Connecting port;

[0034] 3. Drive blade; 32. Second sidewall; 33. Third sidewall; 34. Fourth sidewall; 35. Guide channel; 36. Guide surface;

[0035] 4. Guide arc surface. Detailed Implementation

[0036] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0037] like Figures 1-11 As shown in the figure, this application discloses an oil separator 200 for a rotary compressor 100 and a rotary compressor 100. The rotary compressor 100 can be installed in a refrigeration system or a gas system. The rotary compressor 100 can compress gaseous media. The rotary compressor 100 can be a vane compressor, a scroll compressor, or a rotor compressor, etc. The gaseous media can be refrigerant, air, or various types of gas, etc. The rotary compressor 100 includes a motor 110, a compression mechanism 140, an oil separator 200, and a housing 120. The compression mechanism 140 is connected to the motor 110 for transmission. The motor 110 is used to drive the compression mechanism 140 to compress the gaseous media. The motor 110, the compression mechanism 140, and the oil separator 200 are all located inside the housing 120.

[0038] like Figures 1-11As shown, the oil separator 200 according to an embodiment of this application includes: a separator body 1, an oil baffle 2, and a drive blade 3. The separator body 1 is adapted to be sleeved on the outside of the power output shaft 111 of the motor 110 and connected to the power output shaft 111. The separator body 1 and the power output shaft 111 remain stationary. In some embodiments, the separator body 1 has a first connecting portion, and the power output shaft 111 has a second connecting portion. The first connecting portion and the second connecting portion are connected to each other so that the separator body 1 and the power output shaft 111 are connected together. In other embodiments, the aperture size of the separator body 1 is slightly smaller than the outer diameter size of the power output shaft 111, and the separator body 1 can be assembled onto the power output shaft 111 by an interference fit.

[0039] like Figure 11 As shown, the oil baffle 2 is arranged around the outer peripheral wall of the separator body 1 and extends outward along the radial direction of the separator body 1. When an oil separator 200 is installed inside the rotary compressor 100, such as Figure 8 As shown, the oil baffle 2 is located between the exhaust port 121 of the housing 120 and the fluid passage 130 circumferentially outside the power output shaft 111, or as... Figure 9 As shown, the oil baffle 2 is located between the fluid channel 130 and the compression mechanism 140, or as... Figure 10 As shown, when multiple oil separators 200 are provided in the rotary compressor 100, there are multiple oil baffles 2. Oil baffles 2 are provided between the fluid channel 130 and the compression mechanism 140, and between the exhaust port 121 and the fluid channel 130.

[0040] The compression mechanism 140 is connected to the motor 110 in a transmission manner, and along the axial direction of the motor 110, the compression mechanism 140 is located on one side of the motor 110, and the exhaust port 121 is located on the other side of the motor 110.

[0041] Specifically, in Figures 8-10 In the illustrated embodiment, the exhaust port 121 of the housing 120 is located at the top of the housing 120, the motor 110 is located below the exhaust port 121, and the compression mechanism 140 is located below the motor 110. The fluid passage 130 includes a rotor through-hole 131 and a stator-rotor gap 132, and the fluid passage 130 has a port opposite to the exhaust port 121 and a port opposite to the compression mechanism 140. The exhaust port 121 and the motor 110 are spaced apart along the height direction of the rotary compressor 100, and the motor 110 and the compression mechanism 140 are also spaced apart along the height direction of the rotary compressor 100. It should be noted that the height direction of the rotary compressor 100 can refer to... Figure 8 In the vertical direction, the oil-gas mixture is ejected from the compression mechanism and flows through the fluid channel 130 toward the exhaust port 121.

[0042] The oil baffle 2 is provided with a connecting port 21, which is positioned opposite to the port of the fluid channel 130. One end of the drive blade 3 is connected to the side wall of the connecting port 21, and the other end extends circumferentially along the oil separator 200. The drive blade 3 and the oil baffle 2 have an angle between them, and the drive blade 3 and the oil baffle 2 are not perpendicular to each other. Along the axial direction of the oil separator 200, the drive blade 3 at least partially blocks the connecting port 21. The axial direction of the oil separator 200 can be defined as... Figure 8 In the vertical direction, as the oil-gas mixture flows through the connecting port 21 toward the exhaust port 121, the oil-gas mixture will come into contact with the drive blade 3.

[0043] A flow channel 35 is formed between the drive blade 3 and the oil baffle 2, which is connected to the communication port 21. When the drive blade 3 is impacted by the oil-gas mixture in the fluid channel 130, the drive blade 3 separates the oil-gas mixture into gas medium and oil. The drive blade 3 rotates around the central axis of the oil separator 200, thereby driving the separator body 1 to drive the power output shaft 111 to rotate around the central axis of the power output shaft 111.

[0044] Specifically, such as Figure 2 As shown, since the angle between the drive blade 3 and the baffle plate 2 is less than 90°, when the drive blade 3 comes into contact with the oil-gas mixture, the jet direction of the oil-gas mixture is at an angle to the drive blade 3. The pressure F of the oil-gas mixture acting on the drive blade 3 can be decomposed into a vertical component F' perpendicular to the drive blade 3 and a parallel component F' parallel to the drive blade 3. The vertical component F' can be further decomposed into a tangential component ft along the tangential direction of the oil separator 200 and an axial component fn along the axial direction of the oil separator 200. The tangential component ft is used to drive the oil separator 200 to rotate around the central axis of the oil separator 200. Furthermore, by connecting the separator body 1 to the power output shaft 111, the rotation of the oil separator 200 drives the power output shaft 111 to rotate, thereby reducing the driving force required by the motor 110.

[0045] Simultaneously, as part of the kinetic energy of the oil-gas mixture is converted into the kinetic energy of the oil separator 200 and the power output shaft 111, the kinetic energy of the oil-gas mixture decreases, and the velocity of the oil-gas mixture decreases. This allows the heavier oil droplets in the oil-gas mixture to be separated from the mixture, thus achieving the technical effect of the oil separator 200 separating the oil-gas mixture into oil and gas media. The gas medium separated from the oil-gas mixture can pass through the guide channel 35 and continue to flow towards the exhaust port 121, while the oil droplets can flow along the surface of the drive blade 3 towards the inner peripheral wall of the housing 120. Then, under their own gravity, the oil droplets flow back to the bottom oil storage area of ​​the housing 120.

[0046] Therefore, by using the impact of the oil-gas mixture to drive the blades 3, which in turn drives the oil separator 200 to rotate the power output shaft 111, the kinetic energy of the oil-gas mixture can be converted into the kinetic energy of the power output shaft 111. Furthermore, when the kinetic energy of the oil-gas mixture decreases, the flow rate of the oil-gas mixture can be reduced, thereby separating the gas medium from the oil in the oil-gas mixture. Compared with the prior art, the energy of the oil-gas mixture can be fully utilized, the energy utilization rate within the rotary compressor 100 can be improved, and the energy consumption of the rotary compressor 100 can be reduced.

[0047] It should be noted that, in order to enable the tangential component force ft to assist in driving the power output shaft 111 to rotate rather than hinder it, the folding direction of the drive blade 3 can be designed according to the actual rotation direction of the power output shaft 111, so as to ensure that when the oil-gas mixture impacts the drive blade 3, the direction of the tangential component force ft generated by the drive blade 3 is in the same direction as the rotation direction of the power output shaft 111 at the same radial position.

[0048] like Figures 1-7 As shown, in some embodiments of this application, the drive blade 3 has a first sidewall (not shown in the figure), a second sidewall 32, a third sidewall 33 and a fourth sidewall 34. The first sidewall is fixedly connected to the sidewall of the communication port 21. The second sidewall 32 is located at the free end of the drive blade 3 (i.e. the end of the drive blade 3 away from the oil baffle 2), and the second sidewall 32 and the first sidewall are spaced apart along the circumference of the oil separator 200. The third sidewall 33 and the fourth sidewall 34 are both adjacent to the first sidewall, and the third sidewall 33 and the fourth sidewall 34 are both adjacent to the second sidewall 32. The third sidewall 33 and the fourth sidewall 34 are spaced apart along the radial direction of the oil separator 200.

[0049] At least one of the second sidewall 32, the third sidewall 33, and the fourth sidewall 34 is constructed as a plane, or at least one of the second sidewall 32, the third sidewall 33, and the fourth sidewall 34 is constructed as an arc surface. By constructing the second sidewall 32, the third sidewall 33, or the fourth sidewall 34 as a plane, the forming difficulty of the drive blade 3 can be reduced, and the turbulence generated in the oil-gas mixture can be decreased, thereby reducing the power consumption of the compressor. By constructing the second sidewall 32, the third sidewall 33, or the fourth sidewall 34 as an arc surface, the edges of the drive blade 3 can be curved to guide the oil-gas mixture to generate centrifugal force, thereby enhancing the separation effect between the oil and the gas medium.

[0050] like Figure 11As shown, in some embodiments of this application, along the radial direction of the oil separator 200, the third sidewall 33 is located inside the fourth sidewall 34, and the length of the fourth sidewall 34 is greater than the length of the third sidewall 33. The second sidewall 32 is obliquely connected between the third sidewall 33 and the fourth sidewall 34. It should be noted that the drive blade 3 extends circumferentially along the oil baffle 2, and the length directions of the third sidewall 33 and the fourth sidewall 34 can refer to the circumferential direction of the oil baffle 2. Along the radial direction of the oil separator 200, the circumference of the oil baffle 2 gradually increases. By making the length of the fourth sidewall 34 greater than the length of the third sidewall 33, the guide surface 36 of the drive blade 3 can be made larger, and the surface area of ​​the oil baffle 2 facing the port of the fluid channel 130 is smaller. This results in a larger flow rate of the oil-gas mixture in contact with the drive blade 3 in the oil-gas mixture ejected from the fluid channel 130. This allows the oil separator 200 to fully utilize the kinetic energy of the oil-gas mixture, thereby effectively reducing the energy consumption of the rotary compressor 100.

[0051] like Figures 1-7 As shown, in some embodiments of this application, the drive blade 3 has a guide surface 36 directly opposite the port of the fluid channel 130. The guide surface 36 is constructed as a plane or as an arc surface. Constructing the guide surface 36 as a plane reduces the processing difficulty of the drive blade 3, thereby reducing the processing cost of the oil separator 200. Furthermore, constructing the guide surface 36 as a plane ensures stable separation performance of the drive blade 3, effectively separating the oil-gas mixture. Constructing the guide surface 36 as an arc surface improves the guiding effect of the drive blade 3 on the oil-gas mixture, resulting in a more uniform fluid distribution around the oil separator 200. This prevents excessively high local flow velocities in the oil-gas mixture, thus limiting the remixing of the oil and gas media.

[0052] like Figure 1 , Figure 4 , Figure 6 As shown, in some embodiments of this application, the oil baffle 2 is provided with multiple communication ports 21, which are evenly spaced along the circumference of the oil baffle 2. Correspondingly, multiple drive blades 3 are provided, and the structural dimensions of any two drive blades 3 are identical. By evenly arranging multiple drive blades 3 along the circumference of the oil baffle 2, when the multiple drive blades 3 are impacted by the oil-gas mixture, they can simultaneously drive the oil baffle 2 to rotate the separator body 1. This makes the force on the oil baffle 2 more uniform, and can minimize the risk of the oil separator 200 flipping inside the casing 120 of the rotary compressor 100. This can help prevent the oil separator 200 from failing and also reduce the wear rate between the oil separator 200 and the power output shaft 111.

[0053] In some embodiments of this application, such as Figure 1As shown, along the axial direction of the rotary compressor 100, when the oil baffle 2 is located between the exhaust port 121 and the fluid passage 130, the drive blades 3 are folded upwards towards the side of the oil baffle 2 closest to the exhaust port 121; or, when the oil baffle 2 is located between the compression mechanism 140 and the fluid passage 130, the drive blades 3 are folded downwards towards the side of the oil baffle 2 closest to the compression mechanism 140; and / or, as... Figure 4 As shown, the drive blade 3 is folded towards the side of the oil baffle 2 near the port of the corresponding fluid channel 130. Specifically, the drive blade 3 on the oil baffle 2 above the motor 110 is folded downwards, and the drive blade 3 on the oil baffle 2 below the motor 110 is folded upwards.

[0054] Furthermore, such as Figure 6 As shown, when multiple drive blades 3 are provided on the oil baffle 2, some of the drive blades 3 fold towards the side of the oil baffle 2 near the port of the corresponding fluid channel 130, and the other drive blades 3 fold towards the side of the oil baffle 2 near the exhaust port 121.

[0055] The specific folding direction of the drive blade 3 can be determined based on the size and position of the installation space reserved for the oil separator 200 within the rotary compressor 100. For example, when the installation space between the oil baffle 2 and the exhaust port 121 is more spacious than the installation space between the oil baffle 2 and the port of the fluid channel 130, the drive blade 3 can fold towards the side of the oil baffle 2 closer to the port of the fluid channel 130. Conversely, when the installation space between the oil baffle 2 and the exhaust port 121 is more compact than the installation space between the oil baffle 2 and the port of the fluid channel 130, the drive blade 3 can fold towards the side of the oil baffle 2 closer to the exhaust port 121. Of course, in other embodiments, the specific folding direction of the drive blade 3 can be set according to the actual usage requirements of the oil separator 200.

[0056] Furthermore, when multiple drive blades 3 fold towards opposite sides of the oil baffle plate 2, the included angle between the drive blades 3 on both sides and the oil baffle plate 2 is the same, or the included angle between the drive blades 3 on both sides and the oil baffle plate 2 is different. The included angle between the drive blades 3 on both sides and the oil baffle plate 2 can be set according to the actual working conditions of the rotary compressor 100.

[0057] In some embodiments of this application, such as Figure 2 As shown, when the drive blade 3 folds towards one side of the oil baffle 2, for example... Figure 7When the drive blade 3 folds upward or downward, the folding angle of the drive blade 3 relative to the baffle plate 2 is α, where α satisfies the relationship: 0 < α < 45°. Specifically, when the jet direction of the fluid channel 130 is perpendicular to the baffle plate 2, the pressure F and vertical component F' of the oil-gas mixture acting on the drive blade 3 satisfy the relationship: F' = F * cos(α), and the tangential component ft and vertical component F' satisfy the relationship: ft = F' * sin(α), i.e., ft = F * sin(α) * cos(α). When 0 < α < 45°, the magnitude of the tangential component ft gradually increases as the angle between the drive blade 3 and the baffle plate 2 increases. When 45° < α < 90°, the magnitude of the tangential component ft gradually decreases as the angle between the drive blade 3 and the baffle plate 2 increases, and the magnitude of the tangential component ft is the largest when α = 45°.

[0058] Furthermore, the fluid resistance fz experienced by the driving blade 3 during rotation satisfies the following relationship: fz=sin(α)*s*ρ*v 2 Where s is the surface area of ​​the guide surface 36 of the driving blade 3 impacted by the oil-gas mixture, v is the average velocity of the surrounding fluid when the driving blade 3 rotates, and ρ is the density of the fluid surrounding the driving blade 3, i.e., s*ρ*v 2 The magnitude of α is constant. When 0 < α < 90°, the magnitude of fluid resistance fz gradually increases with the increase of α. Therefore, by setting the included angle α between the drive blade 3 and the baffle plate 2 to be greater than 0 and less than 45°, when the oil separator 200 assists in driving the power output shaft 111 to rotate, the work done by the tangential component force ft to overcome the fluid resistance fz accounts for a smaller proportion of the total work done by the tangential component force ft. That is, the useless work done by the tangential component force ft is less. At this time, the efficiency of the oil separator 200 in assisting in driving the power output shaft 111 to rotate is higher, and the oil separator 200 has a better effect on utilizing the kinetic energy of the oil-gas mixture.

[0059] In some embodiments of this application, the oil baffle 2 and the drive blade 3 are constructed as a single integral part, meaning that the oil baffle 2 and the drive blade 3 can be manufactured using an integral molding process. By constructing the oil baffle 2 and the drive blade 3 as a single integral part, the drive blade 3 can be formed by stamping from the surface of the oil baffle 2. This reduces the steps required to set the drive blade 3 on the oil baffle 2, lowers the molding difficulty of the oil separator 200, improves the processing efficiency of the oil separator 200, and consequently reduces the processing cost of the oil separator 200.

[0060] Of course, in some other embodiments, the oil baffle 2 and the drive blade 3 can be independent components, and each drive blade 3 can be installed on the oil baffle 2 by welding, riveting, bonding, screwing or other methods.

[0061] like Figure 2, Figure 7 As shown in some embodiments of this application, a guide arc surface 4 can be provided between the oil baffle 2 and the drive blade 3 on the side of the oil separator 200 opposite to the port of the fluid channel 130. When the oil-gas mixture impacts the surface of the oil baffle 2, as the oil-gas mixture flows along the oil baffle 2 toward the guide surface 36 of the drive blade 3, the guide arc surface can make the fluid flow more smoothly to the guide surface 36, which can reduce the flow resistance encountered by the fluid flow, thereby increasing the fluid velocity. This can also minimize the accumulation of fluid on the side wall of the oil baffle 2 opposite to the port of the fluid channel 130, and the gas medium in the fluid can flow more smoothly through the guide channel 35 to the exhaust port 121.

[0062] Based on this, this application further discloses a rotary compressor 100, such as... Figures 8-11 As shown, the rotary compressor 100 according to an embodiment of this application includes: a housing 120, a motor 110, a compression mechanism 140, and an oil separator 200. The housing 120 is provided with an exhaust port 121. Figure 8 In the illustrated embodiment, the exhaust port 121 is located at the top of the housing 120, and the motor 110 is disposed inside the housing 120. The motor 110 has a power output shaft 111, which extends along the height direction of the rotary compressor 100 (i.e., Figure 8 The compression mechanism 140 is extended vertically (in the middle) and is connected to the power output shaft 111. The compression mechanism 140 is located on the side of the motor 110 away from the exhaust port 121. Figure 8 The intermediate compression mechanism 140 is located below the motor 110.

[0063] A fluid channel 130 is provided circumferentially outward on the power output shaft 111, along the axial direction of the motor 110 (i.e., Figure 8 The fluid channel 130 has ports at both ends (vertical direction), and is located below the exhaust port 121. One port is open towards the exhaust port 121, and the other port is open towards the compression mechanism 140. The fluid channel 130 is used to guide the oil-gas mixture. The oil separator 200 is disposed inside the housing 120 and mounted on the power output shaft 111. The oil separator 200 is located between the exhaust port 121 and the opposite port of the fluid channel 130 (i.e., the upper port of the fluid channel 130), and / or, the oil separator 200 is located between the compression mechanism 140 and the opposite port of the fluid channel 130 (i.e., the lower port of the fluid channel 130). The oil separator 200 is the oil separator 200 of the above embodiment.

[0064] like Figure 8As shown, according to some specific embodiments of this application, the oil separator 200 can be installed at the end of the power output shaft 111 near the exhaust port 121. In this case, the oil separator 200 is located above the motor 110. During the process of the oil-gas mixture passing through the motor 110 and flowing towards the exhaust port 121, the oil separator 200 separates the oil-gas mixture into oil and gas media. Figure 9 As shown, in some other embodiments, the oil separator 200 is positioned near the middle section of the power output shaft 111. In this case, the oil separator 200 is located between the motor 110 and the compression mechanism 140. During the process of the oil-gas mixture being discharged from the mechanism and flowing towards the exhaust port 121, the oil separator 200 separates the oil-gas mixture into oil and gas media. However, this application is not limited to this, for example in... Figure 10 In the embodiment shown, oil separators 200 can be provided at the end of the power output shaft 111 near the exhaust port 121 and in the middle section of the power output shaft 111. By providing multiple oil separators 200 on the power output shaft 111, the oil and gas medium can be separated more thoroughly, and the amount of lubricating oil discharged from the rotary compressor 100 can be further reduced.

[0065] According to the rotary compressor 100 of this application embodiment, an oil separator 200 is provided inside the rotary compressor 100. By providing drive blades 3 on the oil baffle 2 of the oil separator 200 and making an angle between the drive blades 3 and the oil baffle 2, when the oil-gas mixture impacts the drive blades 3, the oil-gas mixture can drive the oil separator 200 to drive the power output shaft 111 to rotate. This can convert the kinetic energy of the oil-gas mixture into the kinetic energy of the power output shaft 111. When the kinetic energy of the oil-gas mixture decreases, the flow rate of the oil-gas mixture can be reduced, thereby separating the gas medium from the oil in the oil-gas mixture. Compared with the prior art, the energy of the oil-gas mixture can be fully utilized, the energy utilization rate inside the rotary compressor 100 can be improved, and the energy consumption of the rotary compressor 100 can be reduced.

[0066] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. An oil separator for a rotary compressor, characterized by, The rotary compressor further comprises a motor, a compression mechanism and a casing, the oil separator is installed on the motor, the compression mechanism is in transmission connection with the motor, and the motor, the compression mechanism and the oil separator are all arranged in the casing, and the oil separator comprises: A separator body adapted to be sleeved outside a power output shaft of the motor and connected with the power output shaft; An oil baffle annularly arranged on an outer circumferential wall of the separator body and extending radially outwardly along the separator body, the oil baffle is located between an exhaust port of the casing and a fluid passage outside the power output shaft in the circumferential direction, and / or the oil baffle is located between the compression mechanism and the fluid passage, and the oil baffle is provided with a communication port opposite to a port of the fluid passage; A driving vane having one end connected with a side wall of the communication port and the other end extending along the circumferential direction of the oil separator, the driving vane and the oil baffle form an angle therebetween and are not perpendicular to each other, the driving vane at least partially shields the communication port in the axial direction of the oil separator, the driving vane and the oil baffle form a flow guide passage in communication with the communication port, when the driving vane is impacted by the oil-gas mixture in the fluid passage, the driving vane separates the oil-gas mixture into gas medium and oil, and the driving vane rotates around the central axis of the oil separator to drive the separator body to rotate the power output shaft around the central axis of the power output shaft.

2. The oil separator of the rotary compressor according to claim 1, wherein The driving vane has a first side wall, a second side wall, a third side wall and a fourth side wall, the first side wall is fixedly connected with the side wall of the communication port, the second side wall is spaced apart from the first side wall along the circumferential direction of the oil separator, the third side wall and the fourth side wall are adjacent to the first side wall, and the third side wall and the fourth side wall are adjacent to the second side wall, and the third side wall and the fourth side wall are spaced apart along the radial direction of the oil separator; At least one of the second side wall, the third side wall and the fourth side wall is configured as a plane, or At least one of the second side wall, the third side wall and the fourth side wall is configured as an arc surface.

3. The oil separator of the rotary compressor according to claim 2, wherein In the radial direction of the oil separator, the third side wall is located inside the fourth side wall, the length of the fourth side wall is greater than that of the third side wall, and the second side wall is obliquely connected between the third side wall and the fourth side wall.

4. The oil separator of the rotary compressor according to claim 2, wherein The driving vane has a flow guide surface opposite to the port, the flow guide surface is configured as a plane, or The flow guide surface is configured as an arc surface.

5. The oil separator of the rotary compressor according to claim 1, wherein The oil baffle is provided with a plurality of communication ports uniformly spaced apart along the circumferential direction of the oil baffle, and a plurality of driving vanes are correspondingly provided, and the structural dimensions of any two driving vanes are the same.

6. The oil separator of the rotary compressor according to claim 1, wherein In the axial direction of the rotary compressor, the driving vane is folded towards one side of the oil baffle close to the exhaust port, or The driving vane is arranged to be folded towards the oil baffle on the side close to the compression mechanism, and / or The driving vane is arranged to be folded towards the oil baffle on the side close to the corresponding port.

7. The oil separator of the rotary compressor according to claim 6, wherein The folding angle of the driving vane relative to the oil baffle is α, and α satisfies the relationship: 0 < α < 45°.

8. The oil separator of the rotary compressor according to claim 1, wherein The oil baffle and the driving vane are integrally formed.

9. The oil separator of the rotary compressor according to claim 8, wherein On the side of the oil separator opposite to the port, a guide arc surface is arranged between the oil baffle and the driving vane.

10. A rotary compressor characterized by comprising: Comprise: A casing, the casing is provided with an exhaust port; A motor, the motor is arranged in the casing, the motor has a power output shaft, the power output shaft is provided with a fluid channel on the circumferential outside, along the axial direction of the motor, both ends of the fluid channel are provided with ports, the fluid channel is used for guiding oil gas mixture; A compression mechanism, the compression mechanism is in transmission connection with the motor, the compression mechanism is located on the side of the motor away from the exhaust port; An oil separator, the oil separator is arranged in the casing and mounted on the power output shaft, the oil separator is located between the exhaust port and the opposite port, and / or the oil separator is located between the compression mechanism and the opposite port, the oil separator is the oil separator of the rotary compressor according to any one of claims 1-9.

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