Oil retaining structure, motor and compressor

Abstract

The invention provides an oil baffle structure, a motor and a compressor, the oil baffle structure is used for being connected with a rotor assembly, the rotor assembly comprises a rotor iron core, the rotor iron core is provided with a circulation hole for oil gas circulation, the oil baffle structure comprises a first oil baffle part connected with one end of the rotor iron core and provided with a circulation gap, and the circulation hole is communicated with the circulation gap; the second oil blocking component is arranged at the flowing gap, the second oil blocking component comprises at least two movable parts, and the at least two movable parts are movably arranged close to or away from each other; the second oil blocking part is provided with a first position and a second position, and when the second oil blocking part is located at the first position, the at least two movable parts are connected with each other to block the circulation gap; and when the second oil baffle part is located at the second position, the movable parts are separated from each other, so that the circulation gap is communicated with the outside of the rotor core. According to the compressor, the technical problems of rotor exhaust gas backflow of the compressor in a low-frequency state and insufficient oil-gas separation in a high-frequency state in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically, to an oil baffle structure, a motor, and a compressor. Background Technology

[0002] Currently, in the compressor field, especially in rotary compressors used in air conditioning and refrigeration equipment, oil-gas separation is a crucial process that directly affects the compressor's performance and reliability. Traditional compressors use oil baffles and oil caps during the discharge process to separate oil and gas, reducing the amount of refrigerant oil entrained in the discharged refrigerant.

[0003] However, this structure has certain limitations under different operating conditions, especially under low-frequency and high-frequency operating conditions.

[0004] Under low-frequency operating conditions, when the compressor operates at a lower frequency, the rotation of the rotor causes the refrigerant to flow faster from the rotor orifice to the upper chamber of the motor. However, some gas will flow back along the stator tangent to the lower chamber of the motor. This phenomenon increases the energy consumption of the compressor and affects the overall efficiency of the compressor.

[0005] Under high-frequency operating conditions, although the high-speed rotation of the rotor can generate strong centrifugal force, which helps with oil-gas separation, the efficiency of oil-gas separation is still not high due to the limitations of traditional oil baffle structures. Specifically, the design of a single oil baffle cap is insufficient in handling large amounts of high-speed flowing refrigerant at high frequencies, resulting in incomplete oil-gas separation. This leaves the discharged refrigerant still containing a large amount of refrigeration oil, thereby reducing the compressor's energy efficiency. Summary of the Invention

[0006] The main objective of this invention is to provide an oil-blocking structure, a motor, and a compressor to solve the technical problems of rotor exhaust backflow in compressors at low frequencies and insufficient oil-gas separation at high frequencies.

[0007] To achieve the above objectives, according to one aspect of the present invention, an oil-blocking structure is provided for connection to a rotor assembly. The rotor assembly includes a rotor core having a flow hole for oil and gas flow. The oil-blocking structure includes: a first oil-blocking component connected to one end of the rotor core; a flow gap is formed between the first oil-blocking component and the rotor core, and the flow hole communicates with the flow gap; a second oil-blocking component disposed at the flow gap, the second oil-blocking component including at least two movable members movably disposed to move closer to or further away from each other; the second oil-blocking component has a first position and a second position, wherein when the second oil-blocking component is in the first position, the at least two movable members are connected to each other to block the flow gap; and when the second oil-blocking component is in the second position, the at least two movable members are separated to allow the flow gap to communicate with the outside of the rotor core.

[0008] Furthermore, the second oil-blocking component also includes: at least two elastic elements, which are arranged one-to-one with at least two movable elements, and the two ends of each elastic element are respectively connected to the two adjacent movable elements; wherein, the rotor assembly has a high-frequency state in which the rotor core rotates at high speed and a low-frequency state in which the rotor core rotates at low speed. When the rotor assembly is in the low-frequency state, each elastic element contracts and the second oil-blocking component is located in the first position; when the rotor assembly is in the high-frequency state, each elastic element extends and the second oil-blocking component moves to the second position.

[0009] Furthermore, an oil baffle is provided on one end of the rotor core, and at least part of the oil baffle is provided to avoid the flow hole. The oil baffle structure also includes: at least two mounting posts, which are provided on the oil baffle in a one-to-one correspondence with at least two movable parts. The first oil baffle component is connected to the end of the at least two mounting posts away from the oil baffle. The at least two movable parts are located between the oil baffle and the first oil baffle component and are respectively movably connected to the corresponding mounting posts, so that the second oil baffle component is movably arranged between the first position and the second position.

[0010] Furthermore, each movable component is provided with a movable hole, which is a strip-shaped hole. The movable component is fitted onto the mounting post through the strip-shaped hole so that the movable component can be movably set along the extension direction of the strip-shaped hole.

[0011] Furthermore, the movable component includes: a mounting plate movably connected to one end of the rotor core; and a baffle plate, which is arc-shaped and connected to the outer periphery of the mounting plate. The height of the baffle plate is greater than the height of the mounting plate. When the second oil baffle component is in the first position, the baffle plates of at least two movable components form an annular structure to block the flow gap. When the second oil baffle component is in the second position, the baffle plates of at least two movable components separate from each other to open the flow gap.

[0012] Furthermore, the arc length of the mounting plate is less than or equal to the arc length of the blocking plate.

[0013] Furthermore, when the arc length of the mounting plate is less than the arc length of the blocking plate, there is a conductive gap between two adjacent mounting plates, and the flow hole communicates with the conductive gap; and / or, when the arc length of the mounting plate is equal to the arc length of the blocking plate, a through hole is provided at the end of the mounting plate away from the blocking plate, and the flow hole communicates with the through hole.

[0014] Furthermore, a limiting groove extending circumferentially along the first oil-blocking component is provided on the outer peripheral wall of the first oil-blocking component near the end of the second oil-blocking component. When the second oil-blocking component is in the first position, at least a portion of each moving part is located in the limiting groove to cooperate with the first oil-blocking component to seal the flow gap.

[0015] According to another aspect of the present invention, an electric motor is provided, including a rotor assembly and an oil baffle structure, wherein the oil baffle structure is the oil baffle structure mentioned above.

[0016] According to another aspect of the present invention, a compressor is provided, including the aforementioned motor.

[0017] The present invention provides an oil-blocking structure for connection to a rotor assembly. The rotor assembly includes a rotor core with a flow hole for oil and gas flow. The oil-blocking structure includes: a first oil-blocking component connected to one end of the rotor core; a flow gap is formed between the first oil-blocking component and the rotor core, and the flow hole communicates with the flow gap; a second oil-blocking component disposed at the flow gap, the second oil-blocking component including at least two movable members movably disposed to move closer to or further away from each other; the second oil-blocking component has a first position and a second position. When the second oil-blocking component is in the first position, the at least two movable members are connected to each other to block the flow gap; when the second oil-blocking component is in the second position, the at least two movable members are separated to allow the flow gap to communicate with the outside of the rotor core.

[0018] By dynamically adjusting at least two moving parts in the second oil-blocking component—that is, automatically controlling the opening and closing of the flow gap according to the compressor's operating status—the efficiency of oil-gas separation can be effectively adjusted. At low frequencies, at least two moving parts are connected close to each other to block the flow gap, forcing all gas to flow from the stator flow holes and stator tangents to the upper motor cavity, preventing gas backflow and excessive compressor power consumption, thereby improving energy efficiency. At high frequencies, at least two moving parts separate, opening the flow gap, allowing gas from the lower motor cavity to reach the upper motor cavity through the flow holes and flow gap, ensuring sufficient gas flow. Simultaneously, the double-layer oil-blocking structure formed by the first and second oil-blocking components enhances the oil-gas separation effect, reduces the refrigerant oil content, and improves energy efficiency. This solves the technical problems of rotor exhaust backflow in low-frequency compressors and insufficient oil-gas separation in high-frequency compressors.

[0019] As can be seen, the second oil baffle component of this application can automatically adjust its position according to the frequency change of the compressor, which can flexibly cope with the oil-gas separation requirements under different working loads and operating conditions, thereby ensuring the efficient operation of the system while maintaining the stability and safety of the system. Attached Figure Description

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

[0021] Figure 1 A schematic diagram of a structure according to an embodiment of the oil-blocking structure of the present invention is shown;

[0022] Figure 2A cross-sectional view is shown of the second oil-blocking component in the first position according to an embodiment of the oil-blocking structure of the present invention;

[0023] Figure 3 A cross-sectional view is shown of the second oil-blocking component in the second position according to an embodiment of the oil-blocking structure of the present invention;

[0024] Figure 4 A top view is shown of the second oil-blocking component of Embodiment 1 provided by the embodiment of the oil-blocking structure according to the present invention when it is in the first position;

[0025] Figure 5 A top view is shown of the second oil-blocking component of Embodiment 1 provided by the embodiment of the oil-blocking structure according to the present invention when it is in the second position;

[0026] Figure 6 A top view is shown of the second oil-blocking component of Embodiment 2 provided by the embodiment of the oil-blocking structure according to the present invention, when it is in the first position.

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

[0028] 1. Rotor core; 2. Flow hole; 3. Flow clearance; 4. Oil baffle;

[0029] 10. First oil baffle component; 11. Limiting groove;

[0030] 20. Second oil baffle component; 21. Moving part; 210. Strip hole; 211. Mounting plate; 212. Baffle plate; 22. Elastic element; 23. Mounting post; 24. Conductor gap. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] In order to solve the technical problems of rotor exhaust backflow in compressors at low frequencies and insufficient oil-gas separation at high frequencies, this invention provides an oil baffle structure, a motor, and a compressor.

[0033] Please refer to Figures 1 to 6As shown, one aspect of the technical solution of the present invention provides an oil-blocking structure for connection with a rotor assembly. The rotor assembly includes a rotor core 1, which has a flow hole 2 for oil and gas flow. The oil-blocking structure includes: a first oil-blocking component 10 connected to one end of the rotor core 1; a flow gap 3 is formed between the first oil-blocking component 10 and the rotor core 1, and the flow hole 2 communicates with the flow gap 3; a second oil-blocking component 20 disposed at the flow gap 3, the second oil-blocking component 20 including at least two movable members 21, which are movably disposed to move closer to or further away from each other; the second oil-blocking component 20 has a first position and a second position. When the second oil-blocking component 20 is in the first position, the at least two movable members 21 are connected to each other to block the flow gap 3; when the second oil-blocking component 20 is in the second position, the at least two movable members 21 are separated from each other to allow the flow gap 3 to communicate with the outside of the rotor core 1.

[0034] By dynamically adjusting at least two movable parts 21 in the second oil-blocking component 20—that is, automatically controlling the opening and closing of the flow gap 3 according to the compressor's operating state—the efficiency of oil-gas separation can be effectively adjusted. In low-frequency operation, at least two movable parts 21 are connected close to each other to block the flow gap 3, forcing all gas to flow from the stator flow holes and stator tangents to the upper motor cavity, preventing gas backflow and excessive compressor power consumption, thereby improving energy efficiency. In high-frequency operation, at least two movable parts 21 separate, and the flow gap 3 opens, allowing gas from the lower motor cavity to reach the upper motor cavity through the flow holes 2 and the flow gap 3, ensuring sufficient gas flow. Simultaneously, the double-layer oil-blocking structure formed by the first oil-blocking component 10 and the second oil-blocking component 20 enhances the oil-gas separation effect, reduces the refrigerant oil content, and improves energy efficiency. This solves the technical problems of rotor exhaust backflow in low-frequency operation and insufficient oil-gas separation in high-frequency operation in related technologies.

[0035] As can be seen, the second oil baffle component 20 of this application can automatically adjust its position according to the frequency change of the compressor, which can flexibly cope with the oil-gas separation requirements under different working loads and operating conditions, thereby ensuring the efficient operation of the system while maintaining the stability and safety of the system.

[0036] In this embodiment, the opening degree of the second oil baffle component 20 increases with the higher the compressor frequency. The larger the opening, the greater the refrigerant flow efficiency. When the refrigerant is compressed at low frequency and less is compressed, the refrigerant can only pass through the stator tangent and stator flow hole to the upper cavity of the motor. As the frequency increases and more refrigerant is compressed, the second oil baffle component 20 is opened to open the flow gap 3, so that the refrigerant can flow through the flow hole 2 to the upper cavity of the motor via the flow gap 3.

[0037] In this embodiment, the second oil-blocking component 20 further includes at least two elastic elements 22, which are arranged in a one-to-one correspondence with at least two movable elements 21. The two ends of each elastic element 22 are respectively connected to the two adjacent movable elements 21. The rotor assembly has a high-frequency state where the rotor core 1 rotates at high speed and a low-frequency state where the rotor core 1 rotates at low speed. When the rotor assembly is in the low-frequency state, each elastic element 22 is contracted and the second oil-blocking component 20 is located in the first position. When the rotor assembly is in the high-frequency state, each elastic element 22 is extended and the second oil-blocking component 20 moves to the second position.

[0038] The design of the elastic element 22 enables the second oil-blocking component 20 to intelligently respond to the operating speed of the rotor core 1. That is, when the compressor is in a low-frequency state, the centrifugal force generated by the rotation of the rotor core 1 is less than the elastic force of the elastic element 22, and the elastic element 22 is in a contracted state. At this time, at least two moving parts 21 are connected close to each other to block the flow gap 3. As the compressor frequency increases, the rotation speed of the rotor core 1 becomes faster, and the centrifugal force generated becomes greater. When the centrifugal force is greater than the elastic force of the elastic element 22, the elastic element 22 extends, pushing the moving parts 21 to separate from each other, thereby opening the flow gap 3.

[0039] As can be seen, the expansion and contraction characteristics of the elastic element 22 enable the oil-gas separation to maintain optimal performance at different frequencies, enhancing the system's adaptability and flexibility. At low frequencies, the closed flow gap 3 reduces refrigerant backflow and avoids unnecessary energy loss; at high frequencies, the open flow gap 3 ensures sufficient refrigerant flow, while the increased spacing of the moving parts 21 enables more effective oil-gas separation.

[0040] In this embodiment, the elastic element 22 is a spring.

[0041] In this embodiment, an oil baffle seat 4 is provided on one end of the rotor core 1. At least part of the oil baffle seat 4 is provided to avoid the flow hole 2. The oil baffle structure also includes: at least two mounting posts 23, which are provided on the oil baffle seat 4 in a one-to-one correspondence with at least two movable parts 21. The first oil baffle component 10 is connected to the end of the at least two mounting posts 23 away from the oil baffle seat 4. The at least two movable parts 21 are located between the oil baffle seat 4 and the first oil baffle component 10 and are respectively movably connected to the corresponding mounting posts 23, so that the second oil baffle component 20 is movably arranged between the first position and the second position.

[0042] In the above configuration, the mounting column 23 serves as a guide support for the movable component 21, ensuring that the movable component 21 can move smoothly along a predetermined trajectory under the action of the elastic component 22 without deviation or jamming. This allows for precise control of the opening and closing state of the flow gap 3, achieving efficient oil-gas separation. Furthermore, the cooperation between the mounting column 23 and the movable component 21 enables the movable component 21 to quickly switch positions between high-speed and low-speed operation of the rotor core 1. That is, the movement from the first position to the second position is faster, enhancing the system's response speed to changes in rotational speed and ensuring the consistency and stability of the oil-gas separation effect.

[0043] Specifically, each movable component 21 is provided with a movable hole, which is a strip hole 210. The movable component 21 is sleeved on the mounting post 23 through the strip hole 210 so that the movable component 21 can be movably set along the extension direction of the strip hole 210.

[0044] In this way, the slot 210 provides a clear guiding path for the movement of the moving part 21. When the moving part 21 moves along the extension direction of the slot 210, it can ensure that it smoothly and accurately approaches or moves away from the oil baffle 4, thereby precisely controlling the open or closed state of the flow gap 3. Furthermore, the length of the slot 210 can be designed according to actual needs to adapt to different operating frequencies and oil-gas separation requirements. At low frequencies, the slot 210 can limit the movement range of the moving part 21, keeping the flow gap 3 closed, while at high frequencies, the slot 210 allows the moving part 21 to move fully, opening the flow gap 3 and ensuring efficient refrigerant flow.

[0045] In this embodiment, the movable component 21 includes a mounting plate 211 and a blocking plate 212. The mounting plate 211 is movably connected to one end of the rotor core 1. The blocking plate 212 is arc-shaped and connected to the outer periphery of the mounting plate 211. The height of the blocking plate 212 is greater than the height of the mounting plate 211. When the second oil-blocking component 20 is in the first position, the blocking plates 212 of at least two movable components 21 form an annular structure to block the flow gap 3. When the second oil-blocking component 20 is in the second position, the blocking plates 212 of at least two movable components 21 separate from each other to open the flow gap 3.

[0046] The arc-shaped design of the baffle plate 212 and the separability of at least two movable parts 21 enable the at least two baffle plates 212 to fit tightly together to form a closed annular structure at low frequencies, effectively blocking the flow gap 3 and preventing or reducing the backflow of refrigerant, thereby saving energy and improving energy efficiency. At high frequencies, the at least two baffle plates 212 separate from each other, opening the flow gap 3 and ensuring sufficient refrigerant flow. At the same time, the separated baffle plates 212 and the first oil-blocking component 10 work together to form a double-layer oil-blocking structure, improving the oil-gas separation capability and reducing the oil content of the discharged refrigerant.

[0047] The design of this movable part 21 is relatively simple, making it easy to disassemble and maintain, reducing maintenance and replacement costs. It is also easy to inspect and clean, which helps maintain the system in good operating condition. Furthermore, through the combined design of the baffle plate 212 and the mounting plate 211, the oil baffle structure can adapt to the oil-gas separation requirements under different operating conditions, maintaining good separation performance whether operating at low or high frequencies.

[0048] In this embodiment, the arc length of the mounting plate 211 is less than or equal to the arc length of the blocking plate 212.

[0049] In this embodiment, when the arc length of the mounting plate 211 is less than the arc length of the blocking plate 212, there is a conductive gap 24 between two adjacent mounting plates 211, and the flow hole 2 is connected to the conductive gap 24.

[0050] In this way, at low frequencies, the closed structure formed by at least two baffle plates 212 can completely block the direct connection between the flow hole 2 and the outside, preventing refrigerant backflow, thereby saving energy and improving the compressor's energy efficiency. Simultaneously, the conductive gap 24 formed between two adjacent mounting plates 211 is used to avoid the placement of the elastic element 22 and is connected to the flow hole 2. At high frequencies, when the at least two baffle plates 212 are separated, the conductive gap 24 opens wider, and the refrigerant flows through the flow hole 2, sequentially through the conductive gap 24 and the flow gap 3, to the upper cavity of the motor, providing a certain refrigerant flow path.

[0051] In this embodiment, when the arc length of the mounting plate 211 is equal to the arc length of the blocking plate 212, a through hole is provided at the end of the mounting plate 211 away from the blocking plate 212, and the flow hole 2 communicates with the through hole. Each of the two adjacent mounting plates 211 has a mounting groove at one end, and the elastic element 22 is located within the two mounting grooves, with both ends of the elastic element 22 connected to the groove walls of the two mounting grooves respectively.

[0052] The design of the mounting groove ensures that when the second oil baffle 20 is in the first position and at least two mounting plates 211 are in close contact with each other, the elastic element 22 can be stably positioned within the mounting groove. Furthermore, the design of the mounting groove and the elastic element 22 simplifies the structure of the movable element 21, making the connection between the mounting plate 211 and the elastic element 22 more robust and convenient, while ensuring the flexibility of the movable element 21, facilitating assembly and maintenance, and reducing production costs and maintenance difficulty.

[0053] In this embodiment, a limiting groove 11 extending circumferentially along the first oil-blocking component 10 is provided on the outer peripheral wall of the first oil-blocking component 10 near the end of the second oil-blocking component 20. When the second oil-blocking component 20 is in the first position, at least a portion of each movable component 21 is located in the limiting groove 11 to cooperate with the first oil-blocking component 10 to block the flow gap 3.

[0054] The presence of the limiting groove 11 ensures that the moving part 21 correctly and tightly engages with the first oil-blocking component 10 at low frequencies, forming a closed area that effectively blocks the flow gap 3, prevents refrigerant backflow, saves energy, and maintains high energy efficiency under low load. Furthermore, at high frequencies, at least two moving parts 21 separate due to centrifugal force. The limiting groove 11 ensures that when the second oil-blocking component 20 returns to its first position, the moving part 21 accurately resets to its initial position, forming a closed structure with the first oil-blocking component 10, guaranteeing the stability and consistency of the system under different operating modes. It also helps prevent misalignment of the moving part 21 during high-speed rotation, ensuring that all moving parts 21 expand and contract synchronously under centrifugal force, maintaining the integrity and efficiency of the oil-gas separation structure.

[0055] It is evident that the fit between the limiting groove 11 and the moving part 21 restricts the movement range of the moving part 21, enhances the stability of the entire oil-gas separation structure, reduces vibration and noise during operation, and extends the service life of the system.

[0056] According to another aspect of the present invention, an electric motor is provided, including a rotor assembly and an oil baffle structure, wherein the oil baffle structure is the oil baffle structure mentioned above.

[0057] The oil-blocking structure automatically adjusts the state of the rotor assembly's exhaust port according to the compressor's different operating frequencies. At low frequencies, it closes the airflow return channel; at high frequencies, it opens and optimizes oil-gas separation, effectively reducing the oil content in the refrigerant and improving the overall efficiency and energy consumption of the motor and compressor. By combining the oil-blocking structure with the rotor assembly, the separation of refrigerant oil is more thorough after the oil-blocking structure opens, effectively reducing the refrigerant oil content in the refrigerant. The separated refrigerant oil remains inside the compressor, preventing excessive oil loss during refrigerant discharge, which could lead to compressor wear due to oil shortage. This also reduces the impact of refrigerant backflow on motor performance, enhancing the reliability of motor operation.

[0058] This motor design better handles various operating conditions, especially under conditions of large refrigerant pressure fluctuations or frequency changes. The oil baffle structure can adaptively adjust to ensure that the motor maintains a high-efficiency and stable operating state under different conditions. Furthermore, by effectively controlling the oil content in the refrigerant, it ensures that the refrigerant discharged from the compressor has a low oil content, and the separated refrigeration oil remains in the compressor, effectively ensuring that the compressor does not run out of oil.

[0059] According to another aspect of the present invention, a compressor is provided, including the aforementioned motor.

[0060] Because the motor integrates an optimized oil-blocking structure, it can automatically adjust the oil-gas separation effect according to the compressor's operating frequency. This reduces refrigerant backflow during low-frequency operation and improves oil-gas separation efficiency during high-frequency operation, significantly improving the compressor's overall energy efficiency and reducing energy consumption. Furthermore, the specially designed oil-blocking structure of the motor improves the compressor's stability under different operating conditions, reducing the extra work done due to refrigerant backflow at low frequencies and improving the oil separation efficiency at high frequencies, thus preventing compressor oil shortage and enhancing the overall operational reliability of the compressor. This not only improves the compressor's operating efficiency and stability but also optimizes refrigerant circulation, extends equipment life, and simplifies maintenance.

[0061] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0062] An oil-blocking structure is used to connect with a rotor assembly, which includes a rotor core 1. The rotor core 1 has a flow hole 2 for oil and gas flow. The oil-blocking structure includes: a first oil-blocking component 10, connected to one end of the rotor core 1, forming a flow gap 3 between the first oil-blocking component 10 and the rotor core 1, with the flow hole 2 communicating with the flow gap 3; and a second oil-blocking component 20, disposed at the flow gap 3, which includes at least two movable parts 21, which are movably arranged to move closer to or further away from each other. The second oil-blocking component 20 has a first position and a second position. When the second oil-blocking component 20 is in the first position, the at least two movable parts 21 are connected to each other to block the flow gap 3. When the second oil-blocking component 20 is in the second position, the at least two movable parts 21 are separated from each other to allow the flow gap 3 to communicate with the outside of the rotor core 1.

[0063] By dynamically adjusting at least two movable parts 21 in the second oil-blocking component 20—that is, automatically controlling the opening and closing of the flow gap 3 according to the compressor's operating state—the efficiency of oil-gas separation can be effectively adjusted. In low-frequency operation, at least two movable parts 21 are connected close to each other to block the flow gap 3, forcing all gas to flow from the stator flow holes and stator tangents to the upper motor cavity, preventing gas backflow and excessive compressor power consumption, thereby improving energy efficiency. In high-frequency operation, at least two movable parts 21 separate, and the flow gap 3 opens, allowing gas from the lower motor cavity to reach the upper motor cavity through the flow holes 2 and the flow gap 3, ensuring sufficient gas flow. Simultaneously, the double-layer oil-blocking structure formed by the first oil-blocking component 10 and the second oil-blocking component 20 enhances the oil-gas separation effect, reduces the refrigerant oil content, and improves energy efficiency. This solves the technical problems of rotor exhaust backflow in low-frequency operation and insufficient oil-gas separation in high-frequency operation in related technologies. As can be seen, the second oil baffle component 20 of this application can automatically adjust its position according to the frequency change of the compressor, which can flexibly cope with the oil-gas separation requirements under different working loads and operating conditions, thereby ensuring the efficient operation of the system while maintaining the stability and safety of the system.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0066] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0067] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0068] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An oil-blocking structure for connection to a rotor assembly, the rotor assembly including a rotor core (1) having a flow hole (2) for oil and gas flow, characterized in that, The oil-blocking structure includes: The first oil-blocking component (10) is connected to one end of the rotor core (1); a flow gap (3) is formed between the first oil-blocking component (10) and the rotor core (1), and the flow hole (2) communicates with the flow gap (3); The second oil-blocking component (20) is disposed at the flow gap (3). The second oil-blocking component (20) includes at least two movable parts (21), which are movably disposed to move closer to or further away from each other. The second oil-blocking component (20) has a first position and a second position. When the second oil-blocking component (20) is in the first position, the at least two movable parts (21) are connected to each other to block the flow gap (3). When the second oil-blocking component (20) is in the second position, the at least two movable parts (21) are separated from each other so that the flow gap (3) communicates with the outside of the rotor core (1).

2. The oil-blocking structure according to claim 1, characterized in that, The second oil baffle component (20) also includes: At least two elastic elements (22) are provided in a one-to-one correspondence with at least two movable elements (21), and the two ends of each elastic element (22) are respectively connected to the two adjacent movable elements (21); The rotor assembly has a high-frequency state where the rotor core (1) operates at high speed and a low-frequency state where the rotor core (1) operates at low speed. When the rotor assembly is in the low-frequency state, each of the elastic elements (22) contracts and the second oil-blocking component (20) is located in the first position. When the rotor assembly is in the high-frequency state, each of the elastic elements (22) extends and the second oil-blocking component (20) moves to the second position.

3. The oil-blocking structure according to claim 1, characterized in that, An oil baffle (4) is provided on one end of the rotor core (1), and the oil baffle (4) is provided to at least partially avoid the flow hole (2). The oil baffle structure further includes: At least two mounting posts (23) are disposed on the oil baffle seat (4) in a one-to-one correspondence with at least two of the movable parts (21). The first oil baffle component (10) is connected to the end of the at least two mounting posts (23) away from the oil baffle seat (4). At least two of the movable parts (21) are located between the oil baffle seat (4) and the first oil baffle component (10) and are respectively movably connected to the corresponding mounting posts (23) so that the second oil baffle component (20) is movably disposed between the first position and the second position.

4. The oil-blocking structure according to claim 3, characterized in that, Each of the movable parts (21) is provided with a movable hole, which is a strip hole (210). The movable part (21) is sleeved on the mounting post (23) through the strip hole (210) so that the movable part (21) is movably arranged along the extension direction of the strip hole (210).

5. The oil-blocking structure according to claim 1, characterized in that, The movable component (21) includes: Mounting plate (211) is movably connected to one end of the rotor core (1); The baffle plate (212) is arc-shaped and connected to the outer periphery of the mounting plate (211). The height of the baffle plate (212) is greater than the height of the mounting plate (211). When the second oil baffle component (20) is in the first position, the baffle plates (212) of at least two of the movable components (21) form an annular structure to block the flow gap (3). When the second oil baffle component (20) is in the second position, the baffle plates (212) of at least two of the movable components (21) separate from each other to open the flow gap (3).

6. The oil-blocking structure according to claim 5, characterized in that, The arc length of the mounting plate (211) is less than or equal to the arc length of the blocking plate (212).

7. The oil-blocking structure according to claim 6, characterized in that, When the arc length of the mounting plate (211) is less than the arc length of the blocking plate (212), there is a conductive gap (24) between two adjacent mounting plates (211), and the flow hole (2) communicates with the conductive gap (24); and / or, When the arc length of the mounting plate (211) is equal to the arc length of the blocking plate (212), a through hole is provided at the end of the mounting plate (211) away from the blocking plate (212), and the flow hole (2) communicates with the through hole.

8. The oil-blocking structure according to claim 5, characterized in that, A limiting groove (11) extending circumferentially along the first oil-blocking component (10) is provided on the outer peripheral wall of the first oil-blocking component (10) near the end of the second oil-blocking component (20). When the second oil-blocking component (20) is in the first position, at least a portion of each of the movable parts (21) is located in the limiting groove (11) to cooperate with the first oil-blocking component (10) to block the flow gap (3).

9. An electric motor, comprising a rotor assembly and an oil baffle structure, characterized in that, The oil-blocking structure is the oil-blocking structure according to any one of claims 1 to 8.

10. A compressor, characterized in that, Includes the motor as described in claim 9.

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