Oil-gas separation device and compressor with same

Abstract

The invention provides an oil-gas separation device and a compressor with the oil-gas separation device, the oil-gas separation device comprises a cylinder seat exhaust structure, a gas guide plate and an oil baffle structure, the cylinder seat exhaust structure is provided with a gas inlet hole, a gas exhaust hole, a silencing cavity and an oil discharge port, and one end of the gas inlet hole and one end of the gas exhaust hole communicate with the silencing cavity; the other end of the air inlet hole and the other end of the exhaust hole communicate with the outside of the air cylinder base exhaust structure. The oil discharge outlet is formed in the bottom of the silencing cavity. The air guide plate is arranged in the air inlet hole and fixedly connected with the air cylinder seat exhaust structure, and the air guide plate spirally extends in the extending direction of the air inlet hole. The oil blocking structure is arranged at the bottom of the silencing cavity and comprises at least one oil blocking plate, and the oil blocking plates are arranged on the periphery of the oil discharging opening. According to the oil-gas separation device, the spiral gas guide plate is arranged in the gas inlet hole, the oil blocking structure is arranged at the bottom of the silencing cavity, noise reduction is achieved, meanwhile, the oil-gas separation efficiency is improved, and the technical problems that in the prior art, an oil-gas separation device is low in oil-gas separation efficiency and large in exhaust noise are solved.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and more specifically, to an oil-gas separation device and a compressor having the same. Background Technology

[0002] Currently, silencer chambers and baffle structures are widely used in the exhaust systems of refrigerator piston compressors to reduce noise levels during the exhaust process and handle lubricating oil carried in the compressed gas. These structural designs are based on principles of physics, effectively reducing exhaust sound waves while the baffles block some oil droplets, preventing them from being discharged with the gas. Silencer chambers are typically designed with a large volume and contain simple sound-absorbing materials or structures to help absorb some sound energy and reduce the impact of noise on the surrounding environment. Baffles serve as a primary means of oil-gas separation, changing the gas flow direction to cause oil droplets to impact the baffle surface, thus achieving initial oil droplet capture. Furthermore, for further improvement, some compressor manufacturers have experimented with adding filters or oil collection devices to the exhaust system to increase lubricating oil recovery rates, ensure the stability of the compressor's internal lubrication system, and extend the equipment's service life.

[0003] However, existing oil-gas separation devices still face significant technical bottlenecks in practical applications. First, while baffles and silencers can provide some separation and noise reduction, the oil-gas separation efficiency is not ideal. When compressed gas flows at high speed, the tiny oil droplets it carries are often difficult for the baffles to effectively capture due to speed and inertia. This is especially true under high compressor load conditions, where a large amount of oil mist is discharged with the gas, reducing the amount of oil in the compressor's lubrication system and affecting its normal operation and long-term reliability. Second, existing technologies have relatively limited control over exhaust noise. Traditional silencer designs are often overly simplified, resulting in fewer reflections and scatterings of sound waves and insufficient energy dissipation. The suppression of high-frequency noise is particularly poor, affecting not only the user experience but also increasing the overall noise level of the compressor, which is inconsistent with the trend of ultra-quiet operation in modern home appliances. Furthermore, existing structural designs are relatively independent and lack integrated consideration, leading to poor coordination between components and making it difficult to simultaneously optimize oil-gas separation and noise reduction. Summary of the Invention

[0004] The main objective of this application is to provide an oil-gas separation device and a compressor thereon, in order to solve the technical problems of low oil-gas separation efficiency and high exhaust noise in existing oil-gas separation devices.

[0005] To achieve the above objectives, according to one aspect of this application, an oil-gas separation device is provided, comprising:

[0006] The cylinder block exhaust structure is provided with an intake port, an exhaust port, a muffler chamber, and an oil drain port. One end of the intake port and one end of the exhaust port are connected to the muffler chamber, and the other end of the intake port and the other end of the exhaust port are connected to the outside of the cylinder block exhaust structure. The oil drain port is located at the bottom of the muffler chamber.

[0007] The air guide plate is installed inside the air intake hole and is fixedly connected to the cylinder seat exhaust structure. The air guide plate extends spirally along the extension direction of the air intake hole.

[0008] An oil baffle structure is provided at the bottom of the silencing cavity. The oil baffle structure includes at least one oil baffle plate, which is provided around the oil outlet. At least a portion of the oil baffle plate extends axially along the oil outlet.

[0009] Furthermore, the oil baffle structure includes multiple oil baffles, which are spaced apart circumferentially along the oil drain port. The height of each oil baffle on the side closest to the oil drain port and / or the height on the side furthest from the oil drain port gradually decreases.

[0010] Furthermore, the longitudinal section of the plane along the axis of the oil drain port of each oil baffle is trapezoidal. The end of the oil baffle away from the oil drain port forms the upper base of the trapezoid, and the end of the oil baffle near the oil drain port forms the lower base of the trapezoid. The angle between the waist of the trapezoid and the vertical plane is α, where 2°≤α≤4°.

[0011] Furthermore, the trapezoid is a right-angled trapezoid, with the side of the baffle plate away from the drain port forming the height of the right-angled trapezoid, and the side of the baffle plate near the drain port forming the waist of the right-angled trapezoid; or, the trapezoid is an isosceles trapezoid, with the side of the baffle plate away from the drain port and the side of the baffle plate near the drain port forming the two waists of the isosceles trapezoid respectively.

[0012] Furthermore, the oil-gas separation device includes at least two sets of oil-blocking structures, which are arranged sequentially at intervals along the direction away from the oil outlet.

[0013] The radial distance between two adjacent sets of oil baffle structures along the oil outlet is L, where 1.5mm≤L≤3mm; and / or, along the direction away from the oil outlet, the height of the end of at least two sets of oil baffle structures away from the oil outlet decreases sequentially, and the height difference between two adjacent sets of oil baffle structures is H, where 2mm≤H≤5mm.

[0014] Furthermore, the projection shape of the oil baffle plate on the plane perpendicular to the oil drain port axis is a spiral, with the end point of the spiral near the outer ring corresponding to the air intake port and the end point of the spiral near the inner ring corresponding to the oil drain port.

[0015] Furthermore, the oil-gas separation device also includes a silencing bushing, which is fitted on the inner wall of the silencing cavity. The silencing bushing has a cylindrical structure, and the cylindrical wall has an opening that is positioned opposite the air inlet. A bottom plate is provided at one end of the cylindrical structure near the bottom wall of the silencing cavity. An oil baffle structure and an oil guide hole are provided on the bottom plate, and the oil guide hole is positioned opposite the oil outlet.

[0016] Furthermore, an oil guide surface is provided on the side of the base plate away from the bottom of the silencing cavity. Along the direction close to the oil guide hole, the height of the oil guide surface in the axial direction of the oil outlet gradually decreases. The angle between the oil guide surface and the plane perpendicular to the axis of the oil outlet is β, where 2°≤β≤3°.

[0017] Furthermore, along the extension direction of the air intake, the spacing between two adjacent longitudinal sections of the multiple longitudinal sections of the air guide plate gradually decreases in the axial direction of the air intake; or, along the extension direction of the air intake, the spacing between two adjacent longitudinal sections of the multiple longitudinal sections of the air guide plate is equal in the axial direction of the air intake.

[0018] According to another aspect of this application, a compressor is provided, which includes the aforementioned oil-gas separation device.

[0019] By applying the technical solution of this application, a spiral air guide plate is set inside the air inlet. This design creates a strong rotating flow field before the compressed gas enters the muffler chamber. Under the action of centrifugal force, the rotating airflow can efficiently throw oil droplets mixed in the airflow towards the outer wall. Compared with a straight airflow, oil droplets under a rotating flow field are easier to capture and separate, thus significantly improving the efficiency of oil-gas separation. The oil baffle structure is configured at the bottom of the muffler chamber and contains at least one oil baffle plate. This design utilizes the centrifugal tendency of oil droplets in their rotating motion to ensure that after contacting the oil baffle plate, the oil droplets can slide down its surface to the oil outlet instead of re-entering the airflow. By setting the oil baffle structure at the bottom of the muffler chamber, not only is the oil-gas separation capability enhanced, but the special geometry of the oil baffle plate is also used to reduce noise. The spiral structure of the air guide plate itself also helps to disperse and attenuate sound waves during the exhaust process. The gas entering the silencing chamber is guided by the spiral plate to form a non-linear flow. This flow pattern breaks the propagation path of the sound waves and increases the chances of sound waves being reflected and scattered in the silencing chamber, thereby reducing the noise level of the exhaust gas and solving the technical problems of low oil-gas separation efficiency and high exhaust noise in existing oil-gas separation devices. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1A perspective schematic diagram of one embodiment of an oil-gas separation device according to this application is shown;

[0022] Figure 2 A vertical cross-sectional view of one embodiment of the oil-gas separation device according to this application is shown;

[0023] Figure 3 A perspective view of the gas guide plate of the oil-gas separation device according to this application is shown;

[0024] Figure 4 A perspective view of the noise-reducing bushing of the oil-gas separator according to this application is shown;

[0025] Figure 5 A top view of the noise-reducing bushing of the oil-gas separator according to this application is shown;

[0026] Figure 6 A vertical cross-sectional view of the noise-reducing bushing of the oil-gas separator according to this application is shown.

[0027] The above figures include the following reference numerals:

[0028] 100. Cylinder seat exhaust structure; 110. Intake port; 120. Exhaust port; 130. Muffler chamber; 140. Oil drain port; 200. Air guide plate; 300. Oil baffle structure; 310. Oil baffle plate; 400. Muffler bushing; 401. Opening; 410. Base plate; 411. Oil guide hole; 412. Oil guide surface. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Please refer to Figures 1-6This application provides an oil-gas separation device, including: a cylinder block exhaust structure 100, a guide plate 200, and an oil baffle structure 300. The cylinder block exhaust structure 100 is provided with an air inlet 110, an exhaust port 120, a muffler 130, and an oil outlet 140. One end of the air inlet 110 and one end of the exhaust port 120 are connected to the muffler 130, and the other ends of the air inlet 110 and the exhaust port 120 are connected to the outside of the cylinder block exhaust structure 100. The oil port 140 is located at the bottom of the muffler cavity 130; the air guide plate 200 is located inside the air inlet 110 and is fixedly connected to the cylinder seat exhaust structure 100, and the air guide plate 200 extends spirally along the extension direction of the air inlet 110; the oil baffle structure 300 is located at the bottom of the muffler cavity 130, and the oil baffle structure 300 includes at least one oil baffle plate 310, which is located around the oil outlet 140, and at least a portion of the oil baffle plate 310 extends axially along the oil outlet 140.

[0031] The technical solution of this embodiment includes an air inlet 110, an exhaust port 120, a muffler 130, and an oil drain port 140 on the cylinder block exhaust structure 100, as well as a spirally extending air guide plate 200 disposed in the air inlet 110 and an oil baffle structure 300 located at the bottom of the muffler 130. When compressed gas is introduced through the air inlet 110 by the spirally extending air guide plate 200, the gas is forced to form a rotating flow field. Centrifugal force is used to separate oil droplets from the gas, which are then thrown against the cavity wall and slide down to the oil drain port 140 at the bottom of the muffler 130, achieving effective recovery of lubricating oil. At the same time, under the combined action of the spiral flow field and the labyrinthine trapezoidal oil baffle plate 310, the gas undergoes multiple refractions and scatterings, reducing the direct propagation path of sound waves and effectively reducing exhaust noise. This technical solution overcomes the problems of low oil-gas separation efficiency and poor noise reduction effect in the prior art compressor exhaust system, improves the lubricating oil recovery rate and the stability of compressor operation, and significantly reduces compressor noise, improving user experience and overall compressor performance.

[0032] Specifically, the oil baffle structure 300 includes a plurality of oil baffles 310, which are arranged circumferentially along the oil drain port 140. The height of each oil baffle 310 on the side closer to the oil drain port 140 and / or the height on the side farther away from the oil drain port 140 gradually decreases.

[0033] In this embodiment, the oil baffle structure 300 includes multiple oil baffles 310, which are circumferentially spaced along the oil outlet 140. The height of each oil baffle 310 gradually decreases on both sides, near and away from the oil outlet 140. With this design, when the compressor is operating, the injected compressed gas and lubricating oil mixture encounters the oil baffles 310. Due to centrifugal force, oil droplets are captured by the oil baffles 310 and guided to the oil outlet 140, achieving effective oil-gas separation. Simultaneously, the gradually changing height of the oil baffles 310 creates a tortuous gas path, increasing the resistance and path length of gas flow, resulting in multiple reflections and scattering, effectively reducing noise during the exhaust process. This technical solution not only improves the efficiency of oil-gas separation but also significantly reduces exhaust noise, optimizing the compressor's operating environment.

[0034] Depending on the application scenario, the number, spacing, and rate of height reduction of the oil baffles 310 can be adjusted to achieve optimal oil-gas separation and noise reduction. In other embodiments not shown, the shape and distribution of the oil baffles 310 can also be further optimized by designing different geometries or adopting a gradual distribution to achieve more effective interception and noise reduction of the oil-gas mixture.

[0035] Specifically, the longitudinal section of each oil baffle 310 along the plane containing the axis of the oil drain port 140 is trapezoidal. The end of the oil baffle 310 away from the oil drain port 140 forms the upper base of the trapezoid, and the end of the oil baffle 310 near the oil drain port 140 forms the lower base of the trapezoid. The angle between the waist of the trapezoid and the vertical plane is α, where 2°≤α≤4°.

[0036] In this embodiment, each oil baffle 310 is designed as a trapezoidal structure in longitudinal section along the axis of the oil outlet 140. The end furthest from the oil outlet forms the upper base of the trapezoid, and the end closest to the oil outlet forms the lower base. The waist of the trapezoid forms an angle α with the vertical plane, which is controlled within the range of 2° to 4°. This specific trapezoidal baffle design, while ensuring structural stability and reliability, effectively guides oil droplets to slide down the baffle surface, avoiding the possibility of oil droplets being re-entrained into the airflow, thereby optimizing the oil-gas separation effect. The tilt angle α of the oil baffle 310 has a direct impact on the sliding trajectory and speed of the oil droplets. By precisely controlling α within the range of 2° to 4°, it is ensured that the oil droplets can smoothly slide towards the oil outlet under the action of gravity, while preventing uneven distribution of the baffle wall thickness due to an excessively large angle, which would affect the overall structural stability and oil-gas separation efficiency. In addition, the trapezoidal baffle design promotes the scattering of sound waves in the airflow, which helps to reduce noise during the exhaust process. It achieves a perfect combination of oil-gas separation and noise reduction functions, improving the compressor's operating efficiency and user experience.

[0037] In other embodiments not shown in the figures, the shape and tilt angle of the oil baffle 310 can be adjusted according to specific application scenarios to adapt to the oil-gas separation requirements under different operating conditions, while maintaining effective noise suppression. In this way, even under high-speed, high-frequency exhaust conditions, good oil-gas separation performance and noise levels can be maintained, ensuring stable and efficient compressor operation. In other embodiments not shown in the figures, the oil baffle 310 can also be designed with a gradient or wave shape to further enhance the oil-gas separation effect and noise control capability.

[0038] Specifically, the trapezoid is a right trapezoid, with the side of the oil baffle 310 away from the oil drain port 140 forming the height of the right trapezoid and the side of the oil baffle 310 near the oil drain port 140 forming the waist of the right trapezoid; or, the trapezoid is an isosceles trapezoid, with the side of the oil baffle 310 away from the oil drain port 140 and the side of the oil baffle 310 near the oil drain port 140 forming the two waists of the isosceles trapezoid respectively.

[0039] In this embodiment, the oil baffle 310 adopts a right-angled trapezoid or isosceles trapezoid design. The side away from the oil outlet 140 forms the height or one waist of the trapezoid, while the side closer to the oil outlet 140 forms one waist or another waist equal to the side away from the drain. This specific structural choice aims to optimize the guiding path of oil droplets during the oil-gas separation process, ensuring that oil droplets can slide more smoothly down the oil baffle 310 to the oil outlet 140 under the action of centrifugal force, thereby improving the oil droplet recovery efficiency. Through the specific design of the trapezoidal oil baffle 310, not only is the oil-gas separation effect enhanced, but the oil droplets are also guided to flow quickly and accurately to the oil outlet 140, avoiding the possibility of oil droplets being retained in the cavity or being re-entrained into the airflow. This design, combined with the synergistic effect of the spiral plate 3 and the labyrinth-type oil drain silencer bushing 2, achieves efficient oil-gas separation and noise reduction during the compressor exhaust process, improves the stability of compressor operation, and reduces the overall noise level, providing technical support for the optimized operation of the refrigerator piston compressor.

[0040] Specifically, the oil-gas separation device includes at least two sets of oil-blocking structures 300, which are arranged sequentially at intervals along the direction away from the oil outlet 140; wherein the radial distance between two adjacent sets of oil-blocking structures 300 along the oil outlet 140 is L, wherein 1.5mm≤L≤3mm; and / or, along the direction away from the oil outlet 140, the height of the end of the at least two sets of oil-blocking structures 300 away from the oil outlet 140 decreases sequentially, and the height difference between two adjacent sets of oil-blocking structures 300 is H, wherein 2mm≤H≤5mm.

[0041] In this embodiment, the oil-gas separator includes at least two sets of oil-blocking structures 300, which are arranged sequentially at intervals along a direction away from the oil outlet 140. Specifically, the radial distance L between two adjacent sets of oil-blocking structures 300 along the oil outlet 140 is set within the range of 1.5 mm to 3 mm. This design can effectively enhance airflow turbulence, increase sound wave scattering density, and ensure smooth gas passage while preventing the formation of local vortex dead zones, thus ensuring a balance between oil-gas separation efficiency and noise reduction effect.

[0042] Furthermore, along the direction away from the oil outlet 140, the height of at least two sets of oil baffle structures 300 decreases sequentially, with the height difference H between adjacent oil baffle structures set between 2mm and 5mm. This gradually varying height arrangement helps to create more optimized airflow guidance, enhances the axial guidance and stability of the overall airflow, improves the efficiency of oil-gas separation, and breaks the periodicity of sound wave propagation, increasing the sound wave path length and scattering complexity, further reducing exhaust noise and optimizing the compressor's operating environment. Overall, this technical solution achieves synergistic optimization of oil-gas separation and noise reduction functions through meticulous adjustment of the layout and size of the oil baffle structures, improving compressor performance and user experience.

[0043] Specifically, the projection shape of the oil baffle 310 on the plane perpendicular to the axis of the oil drain port 140 is a spiral. The end point of the spiral near the outer ring corresponds to the air inlet 110, and the end point of the spiral near the inner ring corresponds to the oil drain port 140.

[0044] In this embodiment, the projected shape of the oil baffle 310 is designed as a spiral, with the outer end of the spiral corresponding to the air inlet 110 and the inner end corresponding to the oil outlet 140. This structural layout effectively utilizes the tangential force when gas enters the silencing chamber. Through the spiral design of the oil baffle 310, the gas forms a continuous and enhanced rotating flow field during flow, and the oil droplets are more effectively separated and guided to the oil outlet 140 due to centrifugal force. The progressive design of the spiral from the outer to the inner circle not only increases the length of the airflow path and improves the contact opportunity between the oil droplets and the oil baffle 310, but also achieves a smooth transition in airflow speed and direction through its spiral shape, preventing the generation of local turbulence and further improving the efficiency of oil-gas separation. At the same time, the precise alignment of the spiral-shaped oil baffle 310 and the oil outlet 140 ensures that the oil droplets flow smoothly and efficiently to the oil outlet 140 under the dual effects of gravity and flow field guidance, achieving efficient recovery of lubricating oil. This design not only achieves oil-gas separation, but also utilizes the structural characteristics of the tortuous channel and oil baffle to increase the number of sound wave reflections and scatterings in the silencing cavity, effectively reducing the noise level during the exhaust process and improving the quiet operation of the compressor.

[0045] Specifically, such as Figures 4 to 6As shown, the oil-gas separation device also includes a silencing bushing 400, which is fitted on the inner wall of the silencing cavity 130. The silencing bushing 400 is a cylindrical structure, and the cylindrical wall has an opening 401 opposite to the air inlet 110. A bottom plate 410 is provided at one end of the cylindrical structure near the bottom wall of the silencing cavity 130. An oil baffle structure 300 and an oil guide hole 411 are provided on the bottom plate 410, and the oil guide hole 411 is opposite to the oil outlet 140.

[0046] In this embodiment, the oil-gas separation device effectively utilizes the inner wall of the exhaust silencer chamber 130 through the installation of the silencer bushing 400. The silencer bushing 400 has a cylindrical structure, and its opening 401 on the cylindrical wall is opposite to the air inlet 110, ensuring smooth gas flow. The bottom plate 410 near the bottom wall of the silencer chamber 130 integrates an oil-blocking structure 300 and an oil guide hole 411. The oil guide hole 411 is aligned with the oil outlet 140. This layout design optimizes the oil droplet recovery path, allowing the oil droplets to flow smoothly to the oil outlet under gravity, effectively recovering lubricating oil, and reducing noise during the exhaust process. The silencer bushing 400 not only enhances the disturbance of gas flow and improves the oil-gas separation efficiency, but its internal oil-blocking structure 300 can also further guide the oil droplet separation, preventing oil droplets from flowing back into the airflow and ensuring the stable operation of the compressor lubrication system.

[0047] Specifically, an oil guide surface 412 is provided on the side of the base plate 410 away from the bottom of the silencing cavity 130. Along the direction close to the oil guide hole 411, the height of the oil guide surface 412 in the axial direction of the oil outlet 140 gradually decreases. The angle between the oil guide surface 412 and the plane perpendicular to the axis of the oil outlet 140 is β, where 2°≤β≤3°.

[0048] In this embodiment, an oil guiding surface 412 is provided on the side of the base plate 410 away from the bottom of the silencing cavity 130, and its height gradually decreases along the direction close to the oil guiding hole 411 in the axial direction of the oil outlet 140. The angle β between the oil guiding surface 412 and the plane perpendicular to the axis of the oil outlet 140 is set in the range of 2° to 3°. This design can effectively guide oil droplets to flow smoothly along the oil guiding surface 412 to the oil guiding hole 411 by means of gravity, thereby achieving effective recovery of lubricating oil. The reasonable selection of angle β ensures that the oil droplets can flow smoothly and quickly to the oil discharge area under the combined action of gravity and cavity geometry, avoiding stagnation in the bushing or secondary entrainment of airflow, thereby ensuring sufficient lubricating oil inside the compressor, enhancing the stability of compressor operation and extending service life. At the same time, this structural arrangement also helps to reduce the noise level during the exhaust process, because the smooth discharge of oil droplets reduces the vibration and sound caused by oil droplet impact or stagnation during the exhaust process, realizing the synergistic optimization of oil-gas separation and noise reduction functions.

[0049] Specifically, along the extension direction of the air intake 110, the spacing between two adjacent longitudinal sections of the multiple longitudinal sections of the air guide plate 200 in the axial direction of the air intake 110 gradually decreases; or, along the extension direction of the air intake 110, the spacing between two adjacent longitudinal sections of the multiple longitudinal sections of the air guide plate 200 in the axial direction of the air intake 110 is equal.

[0050] In this embodiment, the axial spacing of the longitudinal sections of the air guide plate 200 along the air inlet 110 gradually decreases or remains constant. This design aims to optimize the gas flow path within the oil-gas separation structure. By adjusting the distance between adjacent longitudinal sections, the rotational speed and turbulence of the gas can be controlled, thereby enhancing the oil-gas separation effect. After the gas enters the air inlet 110, as it spirals upward along the surface of the air guide plate 200, the decreasing spacing promotes a gradual increase in gas velocity, generating stronger centrifugal force. This makes it easier for oil droplets to separate from the airflow and adhere to the wall surface, ultimately being collected through the oil discharge area (such as the oil discharge port). On the other hand, if the spacing between adjacent longitudinal sections remains constant, this ensures that the gas has a constant rotational intensity within the separation structure, avoiding energy loss due to sudden changes in the flow channel, and also helps maintain a stable oil-gas separation state.

[0051] This application provides a compressor that includes the aforementioned oil-gas separation device.

[0052] This application also provides a compressor that integrates the aforementioned oil-gas separation device, achieving efficient oil-gas separation and significant noise reduction. Specifically, during operation, the compressed gas first passes through the inlet 110 on the cylinder block exhaust structure 100 and is guided by the guide plate 200 to form a rotating flow field. This effectively utilizes centrifugal force to throw oil droplets in the gas towards the wall of the silencer chamber 130. The oil droplets slide down the wall to the oil outlet 140 at the bottom of the silencer chamber 130, ensuring accurate recovery and recycling of lubricating oil, thus improving the compressor's operational stability and lifespan. Simultaneously, at least one oil baffle 310 in the oil baffle structure 300 further optimizes the oil-gas separation path, preventing oil droplet backflow and improving separation efficiency. Regarding noise reduction, the design of the spirally extending guide plate 200 and the labyrinthine trapezoidal oil baffle 310 causes multiple reflections and scattering of sound waves during gas flow, effectively attenuating exhaust noise, improving the compressor's quietness, and enhancing the user experience. In summary, the compressor of this application, through its integrated and optimized oil-gas separation and noise reduction structure, not only solves the problems of lubricating oil loss and exhaust noise, but also improves overall performance and reduces operating costs.

[0053] When the compressor starts running, the compressed gas enters through the inlet 110 of the cylinder block exhaust structure 100 and comes into contact with the fixedly connected guide plate 200. This contact forces the gas to flow in a spiral shape, and the resulting centrifugal force throws oil droplets toward the outer wall. The oil droplets then slide down the wall to the bottom of the silencing chamber 130 and are finally collected and discharged through the oil outlet 140, achieving effective lubricant recovery. At the same time, the gas continues to spiral upward, passing through the trapezoidal oil baffle structure 300. The special design of the oil baffle plate 310 further improves the oil-gas separation efficiency and prevents oil droplets from being re-entrained into the airflow. Under the influence of the tortuous channel inside the silencing bushing 400, the gas undergoes multiple changes in airflow direction, and the sound waves are reflected and scattered in the channel, effectively reducing exhaust noise. Finally, guided by the oil guide surface 412, the gas flows along the path of gradually decreasing height in the axial direction of the oil outlet 140 to the oil guide hole 411, completing the oil-gas separation process and being discharged from the compressor at a low noise level. Throughout the operation, the combined use of the spiral-extended air guide plate 200, the stepped oil baffle structure 300, and the sound-absorbing bushing 400 ensures the synergistic effect of oil-gas separation and noise reduction, thereby improving the operating stability of the compressor and the user experience, while reducing noise pollution during the exhaust process.

[0054] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0055] Improve oil-gas separation efficiency: By setting the specific spiral extension design of the air guide plate 200 and the oil baffle structure 300, an effective rotating flow field can be formed before the compressed gas enters the silencer chamber 130. With the help of the centrifugal force principle, the oil droplets in the gas are efficiently separated, avoiding the oil droplets from being discharged with the gas and affecting the lubrication and normal operation of the compressor.

[0056] Noise reduction performance optimization: The special design of the silencing bushing 400 and the oil baffle 310 in the device can effectively reduce noise during the exhaust process. The trapezoidal structure of the oil baffle 310 and the synergistic effect of the oil guide hole 411, as well as the shape and material of the inner wall of the silencing bushing 400, cause the sound waves to be reflected and scattered multiple times when the gas flows in the tortuous channel, thereby greatly reducing sound energy and lowering the noise level.

[0057] Lubricating oil recovery and recycling: The design of the inclined angle of the oil baffle 310 and the setting of the oil guide surface 412 on the bottom plate 410 ensure that the separated oil droplets can smoothly slide down the wall to the oil drain port 140 under the action of gravity, realizing the effective recovery and reuse of lubricating oil, reducing the waste of lubricating oil, and ensuring the lubrication conditions of the compressor.

[0058] Compact and Flexible Structure: The compact layout of the oil baffle structure 300, air guide plate 200, and silencer bushing 400 within the device not only saves space but also allows for flexible and diverse overall design through the interoperability of the components. For example, the number, shape, and distribution pattern of the oil baffles 310 (such as spiral, right-angled trapezoid, or isosceles trapezoid) as well as their combination with other components (such as silencer bushing 400 and base plate 410) can be adjusted according to the specific needs of the compressor.

[0059] Adaptable to different working conditions: The multiple sets of oil baffle structures 300 and their varying heights or spacing enable the oil-gas separator to adapt to the working conditions of the compressor under different speeds and loads, thus improving the versatility and adaptability of the device.

[0060] Enhanced stability and lifespan: By improving the oil-gas separation effect and noise reduction function, this oil-gas separation device enhances the stability of compressor operation, reduces the failure rate caused by poor lubrication and noise, and indirectly extends the service life of the compressor.

[0061] In summary, the oil-gas separation device of this application not only significantly outperforms existing technologies in terms of oil-gas separation efficiency and noise reduction performance, but also provides flexibility and adaptability, enabling the compressor to operate stably while optimizing its energy consumption and user experience. It is an innovative and practical solution.

[0062] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An oil-gas separation device, characterized in that, include: A cylinder block exhaust structure (100) is provided with an air inlet (110), an exhaust port (120), a muffler chamber (130), and an oil drain port (140). One end of the air inlet (110) and one end of the exhaust port (120) are connected to the muffler chamber (130), and the other end of the air inlet (110) and the other end of the exhaust port (120) are connected to the outside of the cylinder block exhaust structure (100). The oil drain port (140) is located at the bottom of the muffler chamber (130). Air guide plate (200), the air guide plate (200) is disposed in the air inlet (110) and fixedly connected to the cylinder seat exhaust structure (100), the air guide plate (200) is spirally extended along the extension direction of the air inlet (110); An oil baffle structure (300) is provided at the bottom of the silencing cavity (130). The oil baffle structure (300) includes at least one oil baffle plate (310). The oil baffle plate (310) is provided around the oil drain port (140). At least a portion of the oil baffle plate (310) extends axially along the oil drain port (140).

2. The oil-gas separation device according to claim 1, characterized in that, The oil baffle structure (300) includes a plurality of oil baffles (310), which are arranged circumferentially along the oil drain port (140). The height of each oil baffle (310) on the side closer to the oil drain port (140) and / or on the side farther away from the oil drain port (140) gradually decreases.

3. The oil-gas separation device according to claim 2, characterized in that, The longitudinal section of each of the oil baffles (310) along the axis of the oil drain (140) is trapezoidal. The end of the oil baffle (310) away from the oil drain (140) forms the upper base of the trapezoid, and the end of the oil baffle (310) closer to the oil drain (140) forms the lower base of the trapezoid. The angle between the legs of the trapezoid and the vertical plane is α. 2°≤α≤4°。 4. The oil-gas separation device according to claim 3, characterized in that, The trapezoid is a right-angled trapezoid, with the side of the oil baffle (310) away from the oil outlet (140) forming the height of the right-angled trapezoid, and the side of the oil baffle (310) closer to the oil outlet (140) forming the waist of the right-angled trapezoid; or, The trapezoid is an isosceles trapezoid, and the side of the oil baffle (310) away from the oil outlet (140) and the side of the oil baffle (310) close to the oil outlet (140) respectively form the two sides of the isosceles trapezoid.

5. The oil-gas separation device according to claim 1, characterized in that, The oil-gas separation device includes at least two sets of oil-blocking structures (300), which are arranged at intervals in a direction away from the oil outlet (140); The radial distance between two adjacent sets of oil-blocking structures (300) along the oil outlet (140) is L, wherein 1.5mm ≤ L ≤ 3mm; and / or, Along the direction away from the oil drain port (140), the height of the end of the at least two sets of oil baffle structures (300) away from the oil drain port (140) decreases sequentially, and the height difference between two adjacent sets of oil baffle structures (300) is H, where 2mm≤H≤5mm.

6. The oil-gas separation device according to claim 1, characterized in that, The projection shape of the oil baffle (310) on the plane perpendicular to the axis of the oil drain port (140) is a spiral. The end point of the spiral near the outer ring corresponds to the air inlet (110), and the end point of the spiral near the inner ring corresponds to the oil drain port (140).

7. The oil-gas separation device according to claim 1, characterized in that, The oil-gas separation device also includes a silencing bushing (400), which is fitted on the inner wall of the silencing cavity (130). The silencing bushing (400) is a cylindrical structure with an opening (401) on the cylindrical wall opposite to the air inlet (110). A bottom plate (410) is provided at one end of the cylindrical structure near the bottom wall of the silencing cavity (130). The bottom plate (410) is provided with the oil baffle structure (300) and the oil guide hole (411), which is opposite to the oil outlet (140).

8. The oil-gas separation device according to claim 7, characterized in that, An oil guiding surface (412) is provided on the side of the base plate (410) away from the bottom of the silencing cavity (130). Along the direction close to the oil guiding hole (411), the height of the oil guiding surface (412) in the axial direction of the oil outlet (140) gradually decreases. The angle between the oil guiding surface (412) and the plane perpendicular to the axis of the oil outlet (140) is β. 2°≤β≤3°。 9. The oil-gas separation device according to claim 1, characterized in that, Along the extending direction of the air intake (110), the spacing between two adjacent longitudinal sections of the multiple longitudinal sections of the air guide plate (200) gradually decreases in the axial direction of the air intake (110); or, Along the direction of air intake (110), the spacing between two adjacent longitudinal sections of the air guide plate (200) in the axial direction of the air intake (110) is equal.

10. A compressor, characterized in that, The compressor includes the oil-gas separation device according to any one of claims 1 to 9.

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