Oil distribution structure and compressor

Abstract

The oil separation structure comprises an oil separation cavity, a driving unit, a connecting unit and a separation unit, the driving unit, the connecting unit and the separation unit are arranged in the oil separation cavity, the driving unit is arranged on the connecting unit and can drive the connecting unit to rotate, and the separation unit is arranged on the connecting unit and can rotate along with the connecting unit; the oil separation cavity is provided with an air inlet, an oil-gas mixture enables the driving unit to rotate through the air inlet, then the separation unit is driven to rotate through the connecting unit, and the separation unit can act on the oil-gas mixture when rotating. The high-speed active rotation of the separation unit provides continuous and strong centrifugal force, so that the centrifugal effect required by oil-gas separation is remarkably enhanced and stabilized, the problems of insufficient centrifugal force and limited separation efficiency caused by the fact that a traditional oil separation pipe only depends on the rotation speed of fluid are solved, the oil-gas separation efficiency is greatly improved, and the service life of the oil-gas separator is prolonged. The low oil content of exhaust gas of the compressor is ensured, and the normal operation performance of an air conditioning system is maintained.

Description

Technical Field

[0001] The present invention belongs to the field of compressors, and in particular relates to an oil separation structure and a compressor. Background Art

[0002] Scroll compressors are a highly efficient and reliable type of compressor that have matured since the late 1970s and are widely used in refrigeration, air conditioning, and heat pump systems. Scroll compressors utilize a unique scroll design, which compresses gas through the intermeshing of two intersecting spiral scrolls. This design not only simplifies the internal structure and reduces friction between moving parts, but also significantly improves compression efficiency and operational stability.

[0003] During operation, scroll compressors use lubricating oil to lubricate their moving parts. This oil mixes with the refrigerant gas during the compression process and is discharged with the exhaust gas. If unseparated lubricating oil enters the condenser, evaporator, or other refrigeration system components, it can cause performance degradation or even damage these devices. Therefore, the compressed refrigerant gas must be separated from the oil and gas to ensure that the exhaust gas contains no or minimal lubricating oil. Furthermore, the separated lubricating oil must be recycled back into the compressor to avoid lubricant loss and improve overall system efficiency. Excessive lubricating oil loss not only increases maintenance costs but also reduces compressor performance. By effectively recycling lubricating oil, lubricant consumption can be reduced, thereby lowering operating costs. This also meets environmental protection requirements and reduces the impact of lubricating oil on the environment.

[0004] Traditional oil-gas separation structures are all composed of oil distribution pipes. The oil distribution pipes are cylindrical in design and vertically installed in the oil distribution cavity of the cover body. The oil distribution cavity formed outside the oil distribution pipe causes the oil-gas mixture to rotate inside, and the oil and gas are separated by the centrifugal force generated by the oil-gas mixture itself. However, the magnitude of this centrifugal force depends on the rotation speed of the oil-gas mixture itself, and will be continuously consumed and reduced with the movement, which leads to the limitation of the oil-gas separation effect of the oil distribution pipe structure. Summary of the Invention

[0005] In view of this, the present invention provides an oil separation structure and a compressor, which solve the technical problem of low separation efficiency existing in the traditional oil separation structure.

[0006] In order to solve the above problems, according to one aspect of the present application, an embodiment of the present invention provides an oil separation structure, which includes an oil separation chamber and a driving unit, a connecting unit and a separation unit arranged in the oil separation chamber, the driving unit is arranged on the connecting unit and can drive the connecting unit to rotate, and the separation unit is arranged on the connecting unit and can rotate with the connecting unit; the oil separation chamber has an air inlet, and the oil-gas mixture causes the driving unit to rotate through the air inlet, and then drives the separation unit to rotate through the connecting unit, and the separation unit can act on the oil-gas mixture when it rotates; the separation unit includes a rotating body and a cutting module, the rotating body is fixed on the connecting unit and rotates with it, and the cutting module is arranged at the edge of the rotating body for breaking up oil droplets in the oil-gas mixture.

[0007] In some embodiments, the rotating body is a first blade extending radially, and a plurality of first blades are provided, and the plurality of first blades are distributed along the circumference of the connecting unit.

[0008] In some embodiments, the cutting module is a protrusion arranged on the edge of the first blade.

[0009] In some embodiments, the protrusion is sawtooth-shaped or trapezoidal, and when the protrusion is sawtooth-shaped, its tip angle α satisfies 10°<α<60°.

[0010] In some embodiments, the driving unit includes a plurality of second blades arranged around the outer wall of the connecting unit, and the second blade has an inclined surface at one end away from the connecting unit. The oil-gas mixture acts on the inclined surface through the air inlet to cause the second blade to rotate.

[0011] In some embodiments, the connecting unit includes a rotating shaft and a bearing, the rotating shaft has a shoulder, the rotating shaft cooperates with the bearing and is limited by the shoulder; the driving unit and the separation unit are both fixed on the rotating shaft.

[0012] In some embodiments, the outer wall of the bearing has a plurality of oil holes opened along the circumferential direction, so that the separated lubricating oil can flow up and down along the inner wall of the oil separation cavity.

[0013] In some embodiments, the inner wall of the oil separation cavity is paved with an oil separation ring sheet; and / or the oil separation ring sheet is an integral annular sheet or includes a plurality of arc-shaped sub-sheets in an annular array.

[0014] According to another aspect of the present application, an embodiment of the present invention provides a compressor, which includes a housing and a front end cover, a bracket, a movable plate and a stationary plate arranged in the housing, an oil separation chamber is provided in the front end cover, an oil separation structure as described above is installed in the oil separation chamber, the stationary plate is fixed to the inner end face of the front end cover, the movable plate is installed on the bracket, and a back pressure chamber is formed between the movable plate and the bracket.

[0015] In some embodiments, the front end cover is provided with an oil return port and an exhaust port. The lubricating oil in the oil-gas mixture flows through the oil return port and the oil return channel to the friction pair and the back pressure chamber of the compressor. The gas in the oil-gas mixture is discharged through the exhaust port and recycled.

[0016] In some embodiments, the oil return channel includes a first oil return channel, a second oil return channel and a third oil return channel. The first oil return channel is opened in the stator plate along the first direction, the second oil return channel is opened in the stator plate along the second direction, and the third oil return channel is opened on the bracket, and the first oil return channel, the second oil return channel and the third oil return channel are connected in sequence.

[0017] Compared with the prior art, the oil separation structure of the present invention has at least the following beneficial effects: The oil separation structure provided by the present invention includes an oil separation chamber and a driving unit, a connecting unit and a separating unit arranged in the oil separation chamber. The driving unit is arranged on the connecting unit and can drive the connecting unit to rotate. The separating unit is arranged on the connecting unit and can rotate following the connecting unit. The oil separation chamber has an air inlet, and the oil-gas mixture causes the driving unit to rotate through the air inlet, and then drives the separating unit to rotate through the connecting unit. When the separating unit rotates, it can act on the oil-gas mixture.

[0018] First, the drive unit directly utilizes the kinetic energy of the oil-gas mixture at the inlet to propel its rotation, eliminating the need for an external power source. This ensures low-cost operation and enhanced system reliability. Second, and most importantly, the separation unit's high-speed active rotation provides a sustained and powerful centrifugal force, significantly enhancing and stabilizing the centrifugal effect required for oil-gas separation. This overcomes the problem of traditional oil manifolds relying solely on the fluid's own rotational speed, which results in insufficient centrifugal force and limited separation efficiency. This significantly improves oil-gas separation efficiency, ensures low oil content in the compressor exhaust, and maintains the normal performance of the air conditioning system. Furthermore, the separation unit actively breaks up large oil droplets, making them more susceptible to centrifugal force separation, further enhancing separation effectiveness. Finally, the more efficient and thorough separation and ejection of oil droplets toward the chamber wall, combined with the structural design of the oil separation chamber, significantly accelerates the collection and return of separated lubricant oil, effectively reducing lubricant loss, lowering maintenance costs, and increasing compressor reliability and service life. The entire system, through internal energy conversion and active separation mechanisms, comprehensively enhances compressor performance and efficiency.

[0019] The compressor provided by the present invention is designed based on the above-mentioned oil separation structure. Its beneficial effects can be found in the beneficial effects of the above-mentioned oil separation structure, which will not be described in detail here.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 is a cross-sectional view of an oil separation structure provided by an embodiment of the present invention; Figure 2 Schematic diagram of the oil separation structure provided by an embodiment of the present invention; Figure 3 yes Figure 2 A partial enlarged view of point A in the middle; Figure 4 1 is a structural diagram of a bearing in an oil separation structure provided by an embodiment of the present invention; Figure 5 1 is another structural schematic diagram of a bearing in an oil separation structure provided by an embodiment of the present invention; Figure 6Schematic diagram of the structure of the oil separation ring in the oil separation structure provided by an embodiment of the present invention; Figure 7 is a partial cross-sectional view of a compressor provided by an embodiment of the present invention; Figure 8 yes Figure 7 A partial enlarged view of point B in the middle; Figure 9 yes Figure 7 A partial enlarged view of point C in the middle; in: 1. Oil separation structure; 11. Oil separation chamber; 12. Drive unit; 13. Connection unit; 14. Separation unit; 15. Oil separation ring; 111. Air inlet; 121. Second blade; 131. Rotating shaft; 132. Bearing; 133. Shoulder; 134. Oil through hole; 141. Rotating body; 142. Cutting module; 1411. First blade; 2. Housing; 3. Front cover; 31. Oil return port; 32. Exhaust port; 4. Bracket; 5. Moving disk; 6. Static disk; 7. Back pressure chamber; 8. Oil return channel; 81. First oil return channel; 82. Second oil return channel; 83. Third oil return channel. DETAILED DESCRIPTION

[0023] To further illustrate the technical means and effects employed by the present invention to achieve its intended objectives, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention is provided in conjunction with the accompanying drawings and preferred embodiments. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0024] In the description of the present invention, it should be clarified that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence; the terms "vertical", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, and do not mean that the devices or elements referred to must have a specific direction or position, and therefore cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] Example 1 This embodiment provides an oil separation structure, such as Figures 1-9 As shown, the oil separation structure includes an oil separation chamber 11 and a driving unit 12, a connecting unit 13 and a separating unit 14 arranged in the oil separation chamber 11, the driving unit 12 is arranged on the connecting unit 13 and can drive the connecting unit 13 to rotate, and the separating unit 14 is arranged on the connecting unit 13 and can rotate with the connecting unit 13; the oil separation chamber 11 has an air inlet 111, and the oil-gas mixture rotates the driving unit 12 through the air inlet 111, and then drives the separating unit 14 to rotate through the connecting unit 13, and the separating unit 14 can act on the oil-gas mixture when it rotates.

[0027] Inside the oil separation chamber 11, a connecting unit 13 runs vertically or substantially vertically through it. The drive unit 12 is fixedly mounted in the lower region of the connecting unit 13, near the oil separation chamber 11's air inlet 111, where it is directly impacted by the incoming oil-air mixture. The separation unit 14 is fixedly mounted in the upper region of the connecting unit 13, above the drive unit 12 and closer to the exhaust region of the oil separation chamber 11. Therefore, the drive unit 12, connecting unit 13, and separation unit 14 are mechanically connected to form a series structure: the drive unit 12 drives the connecting unit 13 in rotation, which in turn drives the separation unit 14 in synchronous rotation. The core function of the drive unit 12 is to directly convert the kinetic energy of the oil-air mixture entering the oil separation chamber 11 from the air inlet 111 at a specific speed and direction (usually tangentially) into its own rotational mechanical energy. It does not require an external power source, relying solely on the flow of the oil-air mixture itself as its power input. The primary function of the connecting unit 13 is to rigidly connect the drive unit 12 and separation unit 14, forming a rotating body. It acts as a bridge for power transmission, reliably and efficiently transmitting the rotational motion generated by the drive unit 12 to the separation unit 14 located above. The core function of the separation unit 14 is to actively act on the oil-gas mixture flowing through its area to achieve efficient oil-gas separation. It uses its own high-speed rotation to produce two key effects: first, it enhances the centrifugal rotation of the oil-gas mixture, causing the oil droplets to be thrown toward the wall of the oil separation chamber 11 under the action of stronger centrifugal force; second, its specific structure can physically impact, shear, or chop larger oil droplets in the oil-gas mixture into smaller particles, which are more easily separated under the action of centrifugal force.

[0028] The coordinated operation of the drive unit 12, connection unit 13, and separation unit 14 forms a continuous energy conversion and separation process. The process works as follows: An oil-gas mixture at a certain speed and pressure enters the oil separation chamber 11 through the air inlet 111. This high-speed airflow directly impacts and drives the drive unit 12, located near the inlet, to rotate. The rotation of the drive unit 12 synchronizes the rotation of the connection unit 13, to which it is rigidly connected. The rotation of the connection unit 13, in turn, drives the separation unit 14, fixed above it, to rotate at the same high speed. When the oil-gas mixture flows within the oil separation chamber 11 and reaches the area of the rotating separation unit 14, the separation unit 14 performs a dual function: first, its high-speed rotation significantly enhances the centrifugal effect of the flow field, forcing oil droplets to accelerate toward the walls of the oil separation chamber 11; second, its rotating components actively impact and cut the flowing oil-gas mixture, particularly breaking large, difficult-to-separate oil droplets into smaller particles. These separated and broken oil droplets are thrown to the inner wall of the oil separation chamber 11 under the action of strong centrifugal force, gather into an oil film and eventually flow to the oil return channel under the action of gravity. The gas with most of the oil droplets separated continues to flow upward and is discharged from the exhaust port.

[0029] With the oil separation structure of this embodiment, first, the drive unit 12 directly utilizes the kinetic energy of the oil-gas mixture at the inlet to drive its own rotation, eliminating the need for an external power source. This achieves low-cost operation and higher system reliability. Second, and most importantly, the high-speed active rotation of the separation unit 14 provides a continuous and powerful centrifugal force, significantly enhancing and stabilizing the centrifugal effect required for oil-gas separation. This overcomes the problem of insufficient centrifugal force and limited separation efficiency caused by traditional oil separation pipes relying solely on the fluid's own rotational speed. This significantly improves oil-gas separation efficiency, ensures low oil content in the compressor exhaust, and maintains the normal operation of the air conditioning system. Furthermore, the separation unit 14 actively breaks up large oil droplets, making them more easily separated by centrifugal force, further enhancing the separation effect. Finally, the more efficient and thorough separation and ejection of oil droplets toward the cavity wall, combined with the structural design of the oil separation cavity 11, significantly accelerates the collection and return of separated lubricating oil, effectively reducing lubricating oil loss, lowering maintenance costs, and increasing the reliability and service life of the compressor. The entire system, through internal energy conversion and active separation mechanisms, comprehensively improves the performance and efficiency of the compressor.

[0030] In a specific embodiment, Figure 2 As shown, the separation unit 14 includes a rotating body 141 and a cutting module 142. The rotating body 141 is fixed to the connecting unit 13 and rotates therewith. The cutting module 142 is provided at the edge of the rotating body 141 for breaking up oil droplets in the oil-gas mixture.

[0031] In the specific structure of the separation unit 14, the rotating body 141 is coaxially fixed on the upper end of the connecting unit 13 through the central mounting hole, and the two achieve synchronous rotation through keyways or interference fits; the cutting module 142 is fixed on the outer circumferential surface of the rotating body 141 in a continuous or discontinuous annular array, and its cutting edge extends radially outward along the rotating body 141 to form a physical protrusion structure that is higher than the main body of the rotating body 141, so that the cutting module 142 is located in the main flow channel area of the oil-gas mixture.

[0032] The core function of the rotating body 141 is to transfer the rotational kinetic energy generated by the driving unit 12 to the working area of the separation unit 14 through a rigid connection with the connecting unit 13, thereby providing a stable rotational motion basis for the cutting module 142; the core function of the cutting module 142 is to use its high-speed rotating physical convex structure to actively impact the oil and gas mixture flowing through, and break the large-sized oil droplets suspended in the gas into micron-sized small particles through mechanical shear force, thereby changing the physical form of the oil droplets to improve the separation efficiency.

[0033] When the rotating body 141 and the cutting module 142 work together, the rotating body 141 rotates at high speed under the drive of the connecting unit 13, driving the cutting module 142 fixed to its edge to form a dynamic cutting area. As the oil-gas mixture spirals up along the inner wall of the oil separation chamber 11 to the working area of the separation unit 14, the raised cutting edge of the cutting module 142 continuously cuts the oil droplets at a relatively high speed. This working process has a dual effect: physically, large oil droplets are broken into small droplets through collision and shear, significantly increasing the total surface area of the oil droplets; and fluidically, the local turbulence intensity is enhanced, making the broken small oil droplets more easily captured by the centrifugal force field. Ultimately, oil droplet separation is achieved.

[0034] In a specific embodiment, Figure 2 As shown, the rotating body 141 comprises radially extending first blades 1411. Multiple first blades 1411 are provided, distributed circumferentially around the connecting unit 13. The rotating body 141 employs multiple radially extending first blades 1411, evenly distributed around the connecting unit 13. These multiple radial first blades 1411 form a fan-like fluid driving surface. When the oil-gas mixture flows through, they significantly enhance the guidance and acceleration of the airflow, imparting a stronger rotational motion to the mixture, thereby strengthening the swirl required for centrifugal separation. The cutting modules 142 positioned along the edges of the first blades 1411 form a continuous or discontinuous cutting array, covering a wider flow cross-section during high-speed rotation. This ensures that oil droplets at different radial positions are mechanically cut, improving the fragmentation coverage of large oil droplets. The circumferentially evenly distributed first blades 1411 ensure that the rotating body 141 maintains dynamic balance during high-speed operation, preventing vibration caused by uneven mass distribution and ensuring the long-term operational stability of the oil separation structure.

[0035] In a specific embodiment, Figure 2 and Figure 3 As shown, the cutting module 142 is a protrusion provided on the edge of the first blade 1411. The cutting module 142 adopts a protrusion structure provided on the edge of the first blade 1411, which mainly produces the following effects: when the protrusion structure rotates at high speed with the first blade 1411, its protruding physical contour directly acts on the oil-gas mixture flowing through the blade edge, breaking the oil droplets into smaller particles through mechanical collision and shearing; at the same time, the protrusion structure acts as a local reinforcement point on the blade edge, enhancing the flow field disturbance during rotation, making it easier for the oil droplets to break away from the airflow; in addition, the protrusion structure is directly integrated into the blade body without the need for additional assembly parts, which not only maintains the structural strength but also avoids increasing the rotational resistance, ensuring that the oil separation efficiency is improved while maintaining the stability of the system operation.

[0036] In a specific embodiment, the protrusion is sawtooth-shaped or trapezoidal, and when the protrusion is sawtooth-shaped, the tip angle α thereof satisfies 10°<α<60°.

[0037] The protrusions of cutting module 142 adopt a serrated or trapezoidal structure, with the tip angle α of the serrated protrusions limited to between 10° and 60°. This primarily produces the following effects: the sharp tips of the serrated protrusions more effectively puncture and tear oil droplets during high-speed rotation, significantly enhancing the fragmentation effect; while the trapezoidal protrusions achieve continuous shearing action through their straight edges. Both structures can adapt to the fragmentation needs of oil droplets of varying viscosities. Furthermore, the range of 10° < α < 60° ensures sufficient structural strength at the serrated tips (an angle too small can easily break, while an angle too large can reduce puncture ability), thereby improving oil fragmentation efficiency while ensuring the long-term reliability of the protrusions.

[0038] In a specific embodiment, Figure 2 As shown, the driving unit 12 includes a plurality of second blades 121 arranged around the outer wall of the connecting unit 13. The second blade 121 has an inclined surface at one end away from the connecting unit 13. The oil-gas mixture acts on the inclined surface through the air inlet 111 to cause the second blade 121 to rotate. The driving unit 12 adopts a plurality of second blades 121 arranged around the outer wall of the connecting unit 13. The plurality of second blades 121 are evenly distributed circumferentially to form a continuous driving surface, ensuring that the oil-gas mixture can contact the blade force surface at any phase angle when entering from the air inlet 111, avoiding discontinuous driving force and ensuring rotational stability; the root of the second blade 121 is directly fixed to the outer wall of the connecting unit 13, realizing zero-loss transmission of torque, so that the rotational kinetic energy of the driving unit 12 is efficiently transmitted to the connecting unit 13; the end of the second blade 121 away from the rotation center is designed with an inclined surface, and the angle of the inclined surface matches the tangential intake direction of the air inlet 111, so that the high-speed oil-gas mixture generates a maximum tangential component force when impacting the inclined surface, and efficiently converts the fluid kinetic energy into the blade rotation torque, thereby utilizing the kinetic energy of the oil-gas mixture itself to drive the system to rotate without the need for an additional power source.

[0039] In a specific embodiment, Figure 1 As shown, the connecting unit 13 includes a rotating shaft 131 and a bearing 132. The rotating shaft 131 has a shoulder 133. The rotating shaft 131 cooperates with the bearing 132 and is limited by the shoulder 133. The driving unit 12 and the separating unit 14 are both fixed on the rotating shaft 131.

[0040] In the specific structure of the connecting unit 13, the rotating shaft 131 vertically passes through the central area of the oil separation chamber 11, and a radially protruding shoulder 133 is provided on its shaft body; the inner ring of the bearing 132 (usually a rolling bearing or a sliding bearing) is tightly fitted on the rotating shaft 131, and its end face is tightly fitted with one side of the shoulder 133, so that the bearing 132 is accurately positioned and limited in the axial direction of the rotating shaft 131 through the shoulder 133; the second blade 121 of the driving unit 12 is fixedly mounted on the lower section of the rotating shaft 131 (near the air inlet 111 area), and the first blade 1411 of the separation unit 14 is fixedly mounted on the upper section of the rotating shaft 131 (near the exhaust area), and the three form a coaxial rigid connection.

[0041] The core function of the rotating shaft 131 is to serve as the hub of mechanical transmission, transmitting the rotational power generated by the drive unit 12 to the separation unit 14, and bearing the weight and rotational load of the two; the core function of the bearing 132 is to support the rotating shaft 131 and constrain its radial runout, ensuring that the rotating shaft 131 maintains stable coaxial rotation in the oil separation chamber 11, while reducing rotational friction resistance; the core function of the shoulder 133 is to provide an axial positioning reference surface for the bearing 132, preventing the bearing 132 from axially moving on the rotating shaft 131, and ensuring that the drive unit 12 and the separation unit 14 remain fixed in the axial working position.

[0042] In this embodiment, shoulder 133 precisely positions bearing 132 on rotating shaft 131 through axial restraint, while the outer ring of bearing 132 is fixed to the housing of oil separation chamber 11, providing stable support. When the oil-gas mixture impacts the second blade 121 of drive unit 12, the generated torque is synchronously transmitted to separation unit 14 through rotating shaft 131. Bearing 132 constrains radial displacement of rotating shaft 131, preventing collision between the blades and the chamber. Shoulder 133 prevents axial displacement of rotating shaft 131 during high-speed rotation, ensuring that separation unit 14 remains within its designed operating range. This coordination ultimately achieves high concentricity and low vibration operation of the rotating system, ensuring the long-term stable operation of the oil separation structure.

[0043] In a specific embodiment, Figure 4 and Figure 5As shown, the outer wall of the bearing 132 has a plurality of oil holes 134 opened along the circumferential direction, so that the separated lubricating oil can flow up and down along the inner wall of the oil separation chamber 11. A plurality of circumferentially distributed oil holes 134 are set on the outer wall of the bearing 132. The oil holes 134 allow the lubricating oil adhering to the inner wall of the oil separation chamber 11 and flowing downward to pass through the installation area of the bearing 132 without obstruction, avoiding the accumulation of lubricating oil above the bearing due to the physical structure of the outer ring of the bearing blocking the oil path; at the same time, the circumferentially evenly distributed hole positions ensure that no matter what angle position the rotating shaft 131 is in, a continuous oil passage can be provided, ensuring that the separated lubricating oil can flow stably downward along the entire circumference of the cavity wall to the oil return port, and finally realize the permeability of the oil return path. Among them, the oil holes 134 can be opened along the outer wall of the bearing 132, or can be opened axially downward from the upper end face of the bearing 132.

[0044] In a specific embodiment, the inner wall of the oil separation chamber 11 is paved with an oil separation ring 15. The oil separation ring 15 is laid on the inner wall of the oil separation chamber 11, and is laid circumferentially and tightly against the inner wall of the oil separation chamber 11. Its surface properties (such as its oleophilic material or microstructure) enhance its ability to adsorb oil droplets after centrifugal separation, making it easier for the oil droplets thrown onto the chamber wall to coalesce and form an oil film. Furthermore, the continuous oil film channel formed on the surface of the oil separation ring 15 guides the lubricating oil to flow stably toward the oil return port in the direction of gravity, preventing oil droplets from being retained on the chamber wall or secondary atomization, thereby directly improving oil return efficiency.

[0045] The oil separator ring 15 is a whole annular thin plate or includes a plurality of arc-shaped sub-plates in an annular array.

[0046] When the oil separation ring plate 15 adopts an integral annular thin sheet structure, its continuous and unbroken annular surface provides a uniform and stable adhesion surface for the separated lubricating oil, ensuring that the oil droplets quickly gather and form a complete oil film around the cavity wall, and efficiently guide it to the oil return port through the annular channel; when a combination structure of multiple circumferential array arc sub-plates is adopted, the gaps between the sub-plates can adapt to the thermal deformation stress of the inner wall of the oil separation cavity 11, avoiding cracking of the overall ring plate due to temperature rise. At the same time, the capillary effect formed by the array gap enhances the adsorption capacity of oil droplets, and the modular design of the sub-plates facilitates local maintenance and replacement.

[0047] Example 2 This embodiment provides a compressor, such as Figure 7-Figure 9 As shown, the compressor includes a shell 2 and a front end cover 3, a bracket 4, a movable plate 5 and a static plate 6 arranged in the shell 2. The front end cover 3 is provided with an oil separation chamber 11, and the oil separation structure 1 described in Example 1 is installed in the oil separation chamber 11. The static plate 6 is fixed to the inner end face of the front end cover 3, and the movable plate 5 is installed on the bracket 4. A back pressure chamber 7 is formed between the movable plate 5 and the bracket 4.

[0048] In the overall structure of the compressor, the shell 2 serves as an external sealed container, and its front end is fixedly connected to the front cover 3 by bolts to form a closed cavity; an oil separation chamber 11 is processed inside the front cover 3, and the oil separation structure 1 is installed in the oil separation chamber 11; the stator 6 is vertically fixed to the inner end face of the front cover 3 by bolts; the bracket 4 is coaxially arranged behind the stator 6, and the moving disc 5 is installed on the front end face of the bracket 4 through an eccentric mechanism; the annular gap between the moving disc 5 and the bracket 4 forms a back pressure chamber 7; the rotating shaft 131 of the oil separation structure 1 is supported on the front cover 3 by a bearing 132, and its drive unit 12 is located at the lower part of the oil separation chamber 11 near the air inlet 111, and the separation unit 14 is located at the upper part of the oil separation chamber 11 near the exhaust port area.

[0049] The shell 2 provides overall support and sealing environment for the compressor; the front cover 3 serves as the end cover of the high-pressure cavity, and its built-in oil separation chamber 11 is used to accommodate and fix the oil separation structure 1; the static plate 6 and the dynamic plate 5 engage with each other to form a compression chamber to realize refrigerant gas compression; the bracket 4 supports the moving mechanism of the dynamic plate 5 and forms the boundary of the back pressure chamber 7; the back pressure chamber 7 provides axial sealing force for the dynamic plate 5 and serves as a lubricating oil return channel; the oil separation structure 1 utilizes the kinetic energy of the oil-gas mixture fluid to drive rotation, and realizes efficient oil and gas separation through centrifugal action and mechanical cutting; the oil separation chamber 11 provides a specific flow channel space for oil and gas separation, ensuring that the mixture flows through the oil separation structure 1 in an orderly manner.

[0050] Refrigerant gas enters the meshing cavity between the moving disc 5 and the stator disc 6 through the intake port of the shell 2 and is compressed into a high-pressure oil-gas mixture. The mixture then enters the oil separation chamber 11 tangentially through the oil separation chamber inlet 111 of the front cover 3. The high-speed airflow impacts the drive unit 12 of the oil separation structure 1, causing it to rotate. The torque is transmitted to the separation unit 14 through the connecting unit 13. The rotating separation unit 14 cuts the oil droplets and enhances the centrifugal force, causing the oil droplets to be thrown onto the oil separation ring 15 on the inner wall of the oil separation chamber 11 and gather together. The lubricating oil flows along the cavity wall to the oil return port and is finally injected into the back pressure chamber 7 through the stator disc oil return channel to lubricate the moving parts. The separated gas is discharged from the exhaust port of the front cover. In this process, the oil separation structure 1 uses the self-driving force of the fluid to achieve zero-additional-energy separation. The dual effects of cutting and centrifugation significantly improve separation efficiency and reduce the oil content in the exhaust gas. The back pressure chamber 7 acts as an oil collection chamber to achieve a closed-loop circulation of lubricating oil, reducing oil consumption and improving compressor reliability.

[0051] In a specific embodiment, Figure 7 and Figure 8 As shown, the front end cover 3 is provided with an oil return port 31 and an exhaust port 32. The lubricating oil in the oil-gas mixture flows through the oil return port 31 and the oil return channel 8 to the friction pair and the back pressure chamber 7 of the compressor. The gas in the oil-gas mixture is discharged through the exhaust port 32 and then recycled.

[0052] The oil return port 31 is provided at the bottom area of the oil separation chamber 11 of the front end cover 3. Its effect is to collect the lubricating oil that flows down along the chamber wall after being adsorbed and aggregated by the oil separation ring 15, and to direct the lubricating oil to the friction pair (such as the bracket bearing) and the back pressure chamber 7 of the compressor through the connected oil return channel 8, so as to realize the closed-loop recycling of the lubricating oil, reduce the loss of refrigeration oil and ensure the lubrication reliability of the moving parts; the exhaust port 32 is provided at a position away from the oil return port 31 at the top of the front end cover 3, and its effect is to centrally guide the pure gas separated by the oil separation structure 1 out of the compressor, ensure that the lubricating oil content in the exhaust gas is significantly reduced, prevent the lubricating oil from entering the refrigeration system and causing the performance of the condenser or evaporator to decline, and maintain the refrigerant circulation efficiency of the system.

[0053] In a specific embodiment, Figure 9 As shown, the oil return channel 8 includes a first oil return channel 81, a second oil return channel 82 and a third oil return channel 83. The first oil return channel 81 is opened in the stator plate 6 along the first direction, the second oil return channel 82 is opened in the stator plate 6 along the second direction, and the third oil return channel 83 is opened on the bracket 4, and the first oil return channel 81, the second oil return channel 82 and the third oil return channel 83 are connected in sequence.

[0054] The first oil return channel 81 is set along the axial direction of the stator 6, and the lubricating oil collected by the oil return port 31 of the front cover 3 is vertically introduced into the interior of the stator 6 to avoid the risk of leakage caused by the exposure of the oil path; the second oil return channel 82 turns radially inside the stator 6 and extends orthogonally to the first oil return channel 81, realizing the spatial conversion of the flow direction of the lubricating oil, so that the oil flow is accurately guided to the assembly surface of the bracket 4; the third oil return channel 83 is opened at the corresponding position of the bracket 4, receiving the radial oil from the second oil return channel 82 and directly passing through the back pressure chamber 7, completing the final delivery of the lubricating oil from the separation chamber to the pressure chamber. The three are connected by the axial-radial-axial three-section space to construct the shortest oil return path inside the compact compressor, significantly reducing the flow resistance of the lubricating oil. At the same time, the assembly interface of the stator 6 and the bracket 4 is used to achieve sealing and leakage prevention, and finally the separated lubricating oil is efficiently and stably delivered to the back pressure chamber 7 to lubricate the bearings and friction pairs.

[0055] The refrigerant gas enters the compressor from the air inlet of the shell 2, and is compressed by the meshing of the dynamic disc 5 and the static disc 6 to form a high-pressure oil-gas mixture; the mixture rushes tangentially into the air inlet 111 of the oil separation chamber 11 of the front cover 3, pushing the inclined surface of the second blade 121 of the driving unit 12 to rotate, and the torque is transmitted to the separation unit 14 through the rotating shaft 131 of the connecting unit 13; the rotating shaft 131 is supported by the bearing 132 and axially limited by the shaft shoulder 133, ensuring that the first blade 1411 of the separation unit 14 is at high speed. Rotation; the cutting module 142 on its edge breaks up the oil droplets, while the centrifugal force throws the oil droplets to the inner wall of the oil separation chamber 11; the oil separation ring 15 absorbs the oil droplets and guides the lubricating oil to flow down along the chamber wall to the oil return port 31 of the front cover 3; the lubricating oil flows through the first oil return channel 81 axial section, the second oil return channel 82 radial section and the third oil return channel 83 of the bracket 4 in the stator 6 in sequence, and is finally injected into the back pressure chamber 7 to lubricate the friction pair and maintain the back pressure of the moving plate 5; the separated pure gas is discharged from the exhaust port 32 of the front cover 3. This process realizes efficient oil and gas separation with zero additional energy consumption through the self-driven oil separation structure 1, and the three-stage oil return channel ensures the closed-loop circulation of the lubricating oil, ultimately achieving the core effect of reducing the exhaust oil content, reducing lubricating oil loss and improving the reliability of the compressor.

[0056] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous technical features can be freely combined and superimposed.

[0057] The above are merely preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An oil separation structure, characterized in that: The oil separation structure includes an oil separation chamber and a drive unit, a connecting unit, and a separating unit arranged in the oil separation chamber. The drive unit is arranged on the connecting unit and can drive the connecting unit to rotate. The separating unit is arranged on the connecting unit and can rotate along with the connecting unit. The oil separation chamber has an air inlet. The oil-gas mixture passes through the air inlet to cause the drive unit to rotate, and then drives the separating unit to rotate through the connecting unit. When the separating unit rotates, it can act on the oil-gas mixture. The separation unit includes a rotating body and a cutting module. The rotating body is fixed on the connecting unit and rotates therewith. The cutting module is arranged at the edge of the rotating body and is used to break up oil droplets in the oil-gas mixture.

2. The oil separation structure according to claim 1, characterized in that: The rotating body is a first blade extending in the radial direction. A plurality of first blades are provided, and the plurality of first blades are distributed along the circumference of the connecting unit.

3. The oil separation structure according to claim 2, characterized in that: The cutting module is a protrusion arranged on the edge of the first blade.

4. The oil separation structure according to claim 3, characterized in that: The protrusion is sawtooth-shaped or trapezoidal, and when the protrusion is sawtooth-shaped, the tip angle α thereof satisfies 10°<α<60°.

5. The oil separation structure according to claim 1, characterized in that: The driving unit includes a plurality of second blades arranged around the outer wall of the connecting unit. The second blades have an inclined surface at one end away from the connecting unit. The oil-gas mixture acts on the inclined surface through the air inlet to rotate the second blades.

6. The oil separation structure according to claim 1, characterized in that: The connecting unit includes a rotating shaft and a bearing. The rotating shaft has a shoulder. The rotating shaft cooperates with the bearing and is limited by the shoulder. The driving unit and the separating unit are both fixed on the rotating shaft.

7. The oil separation structure according to claim 6, characterized in that: The outer wall of the bearing has a plurality of oil holes opened along the circumferential direction, so that the separated lubricating oil can flow up and down along the inner wall of the oil separation cavity.

8. The oil separation structure according to claim 1, characterized in that: The inner wall of the oil separation cavity is paved with an oil separation ring sheet; and / or the oil separation ring sheet is an integral annular sheet or includes a plurality of arc-shaped sub-sheets in an annular array.

9. A compressor, characterized in that: The compressor includes a shell and a front end cover, a bracket, a movable plate and a static plate arranged in the shell. An oil separation chamber is provided in the front end cover. The oil separation chamber is installed with an oil separation structure as described in any one of claims 1 to 8. The static plate is fixed on the inner end face of the front end cover, and the movable plate is installed on the bracket. A back pressure chamber is formed between the movable plate and the bracket.

10. The compressor according to claim 9, characterized in that The front end cover is provided with an oil return port and an exhaust port. The lubricating oil in the oil-gas mixture flows through the oil return port and the oil return channel to the friction pair and the back pressure chamber of the compressor. The gas in the oil-gas mixture is discharged through the exhaust port and recycled.

11. The compressor according to claim 10, characterized in that The oil return channel includes a first oil return channel, a second oil return channel and a third oil return channel. The first oil return channel is opened in the stator plate along the first direction, the second oil return channel is opened in the stator plate along the second direction, and the third oil return channel is opened on the bracket, and the first oil return channel, the second oil return channel and the third oil return channel are connected in sequence.

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