Compressor oil separation structure, rotor assembly and compressor

Abstract

The utility model relates to the technical field of compressor discloses a compressor oil separation structure, including first flow guide spare and second flow guide spare, the central position of first flow guide spare has seted up first through -hole, the rim of first through -hole extends and forms first connecting end downward, the central position of second flow guide spare has seted up second through -hole, the rim of second through -hole extends and forms second connecting end downward, and first connecting end is connected with second connecting end, first flow guide spare sequentially is provided with first flow guide portion and mounting hole along the circumference, and first flow guide portion and mounting hole all are located the circumference of first through -hole, be provided with second flow guide portion on second flow guide spare, and second flow guide portion is located the circumference of second through -hole and is located the top of first flow guide portion, realize oil separation through the cooperation of first flow guide portion and second flow guide portion, and the circulation rate of oil separation has been improved, through the reasonable layout of first flow guide portion and mounting hole, more favorably the performance promotion of compressor, the utility model discloses a rotor assembly and compressor.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, specifically relating to a compressor oil separator structure, rotor assembly, and compressor. Background Technology

[0002] A compressor typically consists of a housing, pump assembly, rotor assembly, and stator assembly. The bottom of the housing stores refrigerant oil. During compressor operation, the refrigerant oil at the bottom of the housing flows upwards into the pump assembly as it rotates. It then exits the pump assembly along with the refrigerant and enters the gaps between the rotor and stator assemblies. When the refrigerant passes through the refrigerant passages in the rotor assembly and the upper space of the compressor before exiting, it carries some refrigerant oil with it. If the refrigerant containing refrigerant oil is not sufficiently separated from the refrigerant oil before exiting the compressor, excessive refrigerant oil will be discharged. This will not only cause a drop in the oil level, affecting the compressor's performance and reliability, but also lead to scaling on the heat exchanger connected to the compressor, affecting heat exchange efficiency. Therefore, achieving sufficient separation of refrigerant oil and refrigerant is of great importance.

[0003] In existing technology, multiple oil baffles are arranged around the rotor shaft at the top of the compressor to promote the separation of refrigeration oil and refrigerant. Each oil baffle is inclined radially along the rotor, thereby blocking oil from being discharged. Although this existing oil separation method can block oil from being discharged from the compressor to a certain extent, the blocked oil is difficult to flow back to the bottom of the compressor due to the influence of turbulence resistance, resulting in poor oil circulation. At the same time, the arrangement of the oil baffles occupies too much space on the rotor end face, thus limiting the configuration specifications of the rotor counterweight and hindering the improvement of compressor performance. Utility Model Content

[0004] To address the shortcomings of the existing technology, this invention provides a compressor oil distribution structure. Through the cooperation of a first guide section and a second guide section, the refrigeration oil flows back to the bottom of the compressor through a fixed channel, achieving effective separation of the refrigeration oil and refrigerant, and improving the circulation rate of the refrigeration oil. The rational arrangement of the first guide section and mounting holes provides more assembly space for the rotor counterweight, further enhancing compressor performance. This invention also provides a rotor assembly and a compressor.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0006] In one aspect, the present invention provides a compressor oil distribution structure for installation on the top of the compressor rotor, including a first guide member and a second guide member. The first guide member has a first through hole at its center and a first connecting end extending downward from the edge of the first through hole. The second guide member has a second through hole at its center and a second connecting end extending downward from the edge of the second through hole. The first connecting end is connected to the second connecting end.

[0007] The first draining member is provided with a plurality of first guide portions and a plurality of mounting holes in a circumferential direction. The first guide portions and the mounting holes are both located on the outer periphery of the first through hole. The second draining member is provided with a second guide portion, which is located on the outer periphery of the second through hole and above the first guide portion.

[0008] As a further description of the technical solution of this utility model, the first guide portion is formed by the edge region of the first guide member tilting downward along the circumference of the first guide member, and the second guide portion is formed by the edge of the second guide member bending downward toward the direction close to the second connecting end.

[0009] As a further description of the technical solution of this utility model, there are multiple first guide parts, and an installation clearance hole is provided between two adjacent first guide parts.

[0010] As a further description of the technical solution of this utility model, the second connecting end is connected to the inside of the first connecting end, and the bottom of the first connecting end is flush with the bottom of the second connecting end.

[0011] Secondly, this utility model provides a rotor assembly, including a rotor, a first counterweight, a second counterweight, and the compressor oil distribution structure. The first counterweight and the second counterweight are respectively offset at the top and bottom of the rotor, and the compressor oil distribution structure is riveted to the first counterweight and the rotor through the mounting hole.

[0012] As a further description of the technical solution of this utility model, a shaft mounting hole is provided at the center of the rotor, and an annular area is provided on the outer periphery of the shaft mounting hole. Multiple refrigerant channels are provided in the annular area along the circumferential direction. The first counterweight and the second counterweight are both located on the outer periphery of the annular area, and the first connecting end and the second connecting end are both located between the shaft mounting hole and the annular area.

[0013] As a further description of the technical solution of this utility model, the opposite sides of the refrigerant channel are respectively close to the inner and outer circumferences of the annular section. The inner diameter of the annular section is R1, the inner diameter of the shaft mounting hole is R2, the outer diameter of the first connecting end is R3, the inner diameter of the second connecting end is R4, and the rotor assembly has the following relationship: R1≥R3; R2≤R4; R3>R4.

[0014] As a further description of the technical solution of this utility model, the outer contours of the first draining member and the second draining member are both circular, the outer diameter of the first draining member is R5, the outer diameter of the second draining member is R6, the outer diameter of the rotor is R7, and the rotor assembly has the following relationship: R5≤R7, R6≥R7.

[0015] As a further description of the technical solution of this utility model, the thickness of the first counterweight is H1, the vertical distance between the bottom of the mounting hole and the bottom of the first connecting end is H2, and the rotor assembly has the relationship: H1≥H2.

[0016] Thirdly, this utility model provides a compressor, including a compressor housing, a pump assembly, a stator assembly, and a rotor assembly. The pump assembly, the stator assembly, and the rotor assembly are all disposed inside the compressor housing. The pump assembly is connected to the rotor assembly, and the stator assembly is sleeved on the outside of the rotor assembly.

[0017] In summary, this utility model has at least the following advantages:

[0018] The compressor oil separator structure provided by this utility model includes a first guide component and a second guide component. The first guide component guides the refrigerant oil discharged from the top of the rotor to flow towards the direction closer to the second guide component. Then, guided by the second guide component, the refrigerant oil can flow back to the bottom of the compressor through a fixed channel, achieving effective separation of refrigerant oil and refrigerant and improving the circulation rate of refrigerant oil. At the same time, the reasonable arrangement of the first guide component and the mounting holes allows for more assembly space for the rotor counterweight while achieving oil separation, enabling the assembly of large-volume, heavy-duty rotor counterweights, which is more conducive to improving the performance of the compressor.

[0019] The rotor assembly provided by this utility model, by setting up a compressor oil separator structure, provides more assembly space for the first counterweight, improving the assembly flexibility of the first counterweight and making it suitable for large-volume, heavy-duty first counterweights, which is beneficial to improving compressor performance. At the same time, the compressor oil separator structure can effectively separate the oil carried in the refrigerant and guide the oil to flow back to the bottom of the compressor along a fixed channel, effectively improving the oil circulation rate.

[0020] The compressor provided by this utility model, by setting a rotor assembly, enables the refrigeration oil carried in the refrigerant to be effectively separated and flowed back to the bottom of the compressor along the gap between the stator assembly and the compressor housing, so as to be reused. This improves the recycling rate of refrigeration oil, keeps the oil level at the bottom of the compressor at a relatively stable level, and ensures the reliability of the compressor. Attached Figure Description

[0021] Figure 1 This is an exploded view of the compressor oil separator structure of Embodiment 1 of this utility model;

[0022] Figure 2 This is a front view of the first and second draining components of Embodiment 1 of this utility model;

[0023] Figure 3 This is a top view of the first draining component in Embodiment 1 of this utility model;

[0024] Figure 4 This is a schematic diagram of the rotor assembly of Embodiment 2 of this utility model;

[0025] Figure 5 This is a top view of the rotor of Embodiment 2 of this utility model;

[0026] Figure 6 This is a cross-sectional view of the rotor assembly of Embodiment 2 of this utility model;

[0027] Figure 7 This is a front view of the rotor assembly of Embodiment 2 of this utility model;

[0028] Figure 8 This is a cross-sectional view of the compressor in Embodiment 3 of this utility model.

[0029] Marked in the image:

[0030] 1. First drainage element; 11. First through hole; 12. First connecting end; 13. First guide section; 14. Mounting hole; 15. Mounting clearance hole;

[0031] 2. Second drain element; 21. Second through hole; 22. Second connecting end; 23. Second guide section;

[0032] 3. Rotor; 31. Shaft mounting hole; 32. Annular zone; 33. Refrigerant passage;

[0033] 4. First counterweight; 5. Second counterweight;

[0034] 100. Compressor oil separator structure; 200. Compressor housing; 300. Pump assembly; 400. Stator assembly; 500. Rotor assembly. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] refer to Figures 1 to 3 The compressor oil distribution structure provided in this embodiment is used to install on the top of the compressor rotor. It includes a first guide member 1 and a second guide member 2. The first guide member 1 has a first through hole 11 at its center, and the edge of the first through hole 11 extends downward to form a first connecting end 12. The second guide member 2 has a second through hole 21 at its center, and the edge of the second through hole 21 extends downward to form a second connecting end 22. The second connecting end 22 is connected to the interior of the first connecting end 12, and the bottom of the first connecting end 12 is flush with the bottom of the second connecting end 22. The bottoms of the first connecting end 12 and the bottoms of the second connecting end 22 can abut against the top of the compressor rotor.

[0039] The first guide member 1 is provided with a plurality of first guide portions 13 and a plurality of mounting holes 14 arranged circumferentially, and the first guide portions 13 and mounting holes 14 are all located on the outer periphery of the first through hole 11. The second guide member 2 is provided with a second guide portion 23, which is located on the outer periphery of the second through hole 21 and above the first guide portions 13. In this embodiment, there are three first guide portions 13 and two mounting holes 14.

[0040] Understandably, the area around the first through hole 11 on the first guide element 1 is divided into two functional areas. One functional area has multiple mounting holes 14 for connecting the rotor counterweight and the rotor. The other functional area has multiple first guide sections 13 for guiding the flow of refrigeration oil. The rational arrangement of the first guide sections 13 and mounting holes 14 allows for more assembly space for the rotor counterweight, improving assembly flexibility and enabling the adaptation to large-volume, heavy-duty rotor counterweights, which is more conducive to improving compressor performance.

[0041] Understandably, when the refrigerant carrying the refrigeration oil reaches the top of the rotor through the refrigerant passage, the refrigeration oil will first flow towards the second guide section 23 under the guidance of the first guide section 13. Then, under the guidance of the second guide section 23, it will flow downwards along a fixed return path and reach the bottom of the compressor, while the refrigerant will normally reach the upper chamber of the compressor and be discharged. This achieves effective separation of the refrigerant and refrigeration oil, and also allows the separated refrigeration oil to smoothly return to the bottom of the compressor, improving the circulation rate of the refrigeration oil.

[0042] It should be noted that during the operation of the compressor, the refrigerant carrying the refrigeration oil is transferred to the upper chamber of the compressor along the refrigerant channel of the rotor and other gap channels. Since the first guide 1 and the second guide 2 located at the top of the rotor rotate with the rotor, the rotation of the first guide 1 and the second guide 2 will reduce the pressure at the top of the rotor, causing more refrigerant and refrigeration oil to reach the top of the rotor through the refrigerant channel of the rotor, reducing the amount of refrigerant and refrigeration oil passing through other gap channels, thereby reducing the turbulence resistance of other gap channels, so that the returning refrigeration oil can smoothly reach the bottom of the compressor along the fixed gap channel. In this embodiment, the return channel of the refrigeration oil is the gap between the stator assembly and the compressor housing.

[0043] In one embodiment, the first guide portion 13 is formed by the edge region of the first guide member 1 inclined downward along the circumference of the first guide member 1, and the second guide portion 23 is formed by the edge of the second guide member 2 bent downward toward the second connecting end 22. The inclination direction of the first guide portion 13 is adapted to the rotation direction of the rotor. The first guide portion 13 can guide the refrigeration oil to flow upward along the tangential direction of the rotor in accordance with the rotation direction of the rotor. When the refrigeration oil reaches the second guide portion 23, it first flows upward along the curved part of the second guide portion 23, and then reaches the edge position of the second guide member 2. Since the bending amplitude of the edge of the second guide member 2 is very small and close to a horizontal state, it will block the refrigeration oil from continuing to flow upward, causing the refrigeration oil to form a downward flow tendency, thereby causing the refrigeration oil to flow back downward along a fixed path.

[0044] In some embodiments, a mounting clearance hole 15 is provided between two adjacent first guide sections 13. The mounting clearance hole 15 can be configured to penetrate the edge of the first guide member 1 or not penetrate the edge of the first guide member 1. Since the counterweights at the top and bottom of the rotor are usually staggered, opening the mounting clearance hole 15 makes it easier to install the counterweight at the bottom of the rotor, which helps to reduce the assembly difficulty.

[0045] It should be noted that in some embodiments, the compressor oil distribution structure may only include the first guide member 1 and not the second guide member 2. The first guide part 13 may be configured to penetrate the edge of the first guide member 1 or may not be configured to penetrate the edge of the first guide member 1.

[0046] The compressor oil separator structure in this embodiment guides the refrigerant oil discharged from the top of the rotor towards the direction of the second guide section through the first guide section. The oil then flows back to the bottom of the compressor along a fixed channel guided by the second guide section. This achieves effective separation of the refrigerant oil and refrigerant, and improves the oil circulation rate. Simultaneously, the rational arrangement of the first guide section and mounting holes provides more assembly space for the rotor counterweight, improving assembly flexibility and allowing for the adaptation to large-volume, heavy-duty rotor counterweights, which is more conducive to improving compressor performance.

[0047] Example 2

[0048] refer to Figures 4 to 7 The rotor assembly provided in this embodiment includes a rotor 3, a first counterweight 4, a second counterweight 5, and a compressor oil distribution structure 100 of embodiment 1. The first counterweight 4 and the second counterweight 5 are respectively offset at the top and bottom of the rotor 3. The compressor oil distribution structure 100 is riveted to the first counterweight 4 and the rotor 3 through the mounting hole 14, that is, the first counterweight 4 is connected between the first guide member 1 and the rotor 3.

[0049] A shaft mounting hole 31 is provided at the center of the rotor 3. An annular area 32 is provided on the outer periphery of the shaft mounting hole 31. Multiple refrigerant channels 33 are provided in the annular area 32 along the circumference of the rotor 3. The first counterweight 4 and the second counterweight 5 are both located on the outer periphery of the annular area 32. The first connecting end 12 and the second connecting end 22 are both located between the shaft mounting hole 31 and the annular area 32. The first guide part 13 corresponds to the position of the refrigerant channel 33.

[0050] In this embodiment, the opposite sides of the refrigerant passage 33 are respectively close to the inner and outer circumferences of the annular region 32. The inner diameter of the annular region 32 is R1, the inner diameter of the shaft mounting hole 31 is R2, the outer diameter of the first connecting end 12 is R3, and the inner diameter of the second connecting end 22 is R4. The rotor assembly has the following relationships: R1≥R3; R2≤R4; R3>R4. Therefore, it can be ensured that both the first connecting end 12 and the second connecting end 22 are located in the area between the shaft mounting hole 31 and the refrigerant passage 33, which neither interferes with the connection between the shaft and the shaft mounting hole 31 nor affects the flow of refrigerant through the refrigerant passage 33, ensuring the normal operation of the compressor.

[0051] In this embodiment, the outer contours of both the first guide member 1 and the second guide member 2 are circular. The outer diameter of the first guide member 1 is R5, the outer diameter of the second guide member 2 is R6, and the outer diameter of the rotor 3 is R7. The rotor assembly has the following relationship: R5≤R7, R6≥R7, preferably R5<R7; R6>R7. Since the refrigerant passage 33 is usually located close to the shaft mounting hole 31, by reasonably reducing the size of the first guide member 1, both the flow guiding effect and the raw material cost can be reduced. By reasonably increasing the size of the second guide member 2, the refrigeration oil can be fully guided to flow towards the outer periphery of the stator assembly, thereby ensuring that the refrigeration oil can flow back to the bottom of the compressor along the gap channel between the stator assembly and the compressor housing.

[0052] In this embodiment, the thickness of the first counterweight 4 is H1, the vertical distance between the bottom of the mounting hole 14 and the bottom of the first connecting end 12 is H2, and the rotor assembly has the relationship: H1≥H2, that is, the first connecting end 12 can be set to abut against the rotor 3 or not to abut against the rotor 3. Since the bottom of the second connecting end 22 is flush with the bottom of the first connecting end 12, the connection relationship between the second connecting end 22 and the rotor 3 is the same as that of the first connecting end 12.

[0053] The rotor assembly of this embodiment, by setting the compressor oil separator structure of Embodiment 1, can effectively separate the refrigerant and refrigeration oil, and guide the separated refrigeration oil back to the bottom of the compressor along a fixed channel, effectively improving the oil circulation rate and stabilizing the oil level in the compressor. At the same time, it improves the assembly flexibility of the first counterweight, allowing for the adaptation to large-volume, heavy-duty first counterweights, which is beneficial to improving compressor performance.

[0054] Example 3

[0055] refer to Figure 8 The compressor provided in this embodiment includes a compressor housing 200, a pump assembly 300, a stator assembly 400, and a rotor assembly 500 as in Embodiment 2. The pump assembly 300, the stator assembly 400, and the rotor assembly 500 are all disposed inside the compressor housing 200. The rotating shaft of the pump assembly 300 is connected to the rotating shaft mounting hole 31 of the rotor assembly 500, and the stator assembly 400 is sleeved on the outside of the rotor assembly 500.

[0056] When the compressor is running, the refrigeration oil flows upward from the bottom of the compressor along with the operation of the pump assembly 300, and is discharged from the top of the pump assembly 300 along with the refrigerant. Then, it passes through the refrigerant passage 33 of the rotor assembly 500 to reach the top of the rotor 3. The refrigerant continues to rise to the upper chamber of the compressor and is discharged. Meanwhile, the refrigeration oil, guided by the first guide section 13 and the second guide section 23, flows back to the bottom of the compressor along the gap channel between the stator assembly 400 and the compressor housing 200.

[0057] In this embodiment, the compressor, by setting the rotor assembly of Embodiment 2, enables the refrigeration oil carried in the refrigerant to be effectively separated and flow back to the bottom of the compressor along the gap between the stator assembly and the compressor housing, so that it can be reused. This improves the recycling rate of the refrigeration oil, keeps the oil level at the bottom of the compressor at a relatively stable level, and ensures the reliability of the compressor.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0060] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A compressor oil separator structure for mounting on top of the compressor rotor, characterized in that, It includes a first draining member (1) and a second draining member (2). The first draining member (1) has a first through hole (11) at its center and a first connecting end (12) extending downward from the edge of the first through hole (11). The second draining member (2) has a second through hole (21) at its center and a second connecting end (22) extending downward from the edge of the second through hole (21). The first connecting end (12) is connected to the second connecting end (22). The first drainage component (1) is provided with a plurality of first guide portions (13) and a plurality of mounting holes (14) in a circumferential direction. The first guide portions (13) and the mounting holes (14) are both located on the outer periphery of the first through hole (11). The second drainage component (2) is provided with a second guide portion (23). The second guide portion (23) is located on the outer periphery of the second through hole (21) and above the first guide portion (13).

2. The compressor oil separator structure according to claim 1, characterized in that, The first guide portion (13) is formed by the edge region of the first guide member (1) tilting downward along the circumference of the first guide member (1), and the second guide portion (23) is formed by the edge of the second guide member (2) bending downward toward the direction close to the second connecting end (22).

3. The compressor oil separator structure according to claim 1, characterized in that, There are multiple first guide sections (13), and an installation clearance hole (15) is provided between two adjacent first guide sections (13).

4. The compressor oil separator structure according to claim 1, characterized in that, The second connection end (22) is connected to the inside of the first connection end (12), and the bottom of the first connection end (12) is flush with the bottom of the second connection end (22).

5. A rotor assembly, characterized in that, The compressor includes a rotor (3), a first counterweight (4), a second counterweight (5), and a compressor oil distribution structure (100) as described in any one of claims 1-4. The first counterweight (4) and the second counterweight (5) are respectively offset at the top and bottom of the rotor (3). The compressor oil distribution structure (100) is riveted to the first counterweight (4) and the rotor (3) through the mounting hole (14).

6. The rotor assembly according to claim 5, characterized in that, The rotor (3) has a shaft mounting hole (31) at its axial center. The outer periphery of the shaft mounting hole (31) is provided with an annular area (32). Multiple refrigerant channels (33) are provided circumferentially within the annular area (32). The first counterweight (4) and the second counterweight (5) are both located on the outer periphery of the annular area (32). The first connecting end (12) and the second connecting end (22) are both located between the shaft mounting hole (31) and the annular area (32).

7. The rotor assembly according to claim 6, characterized in that, The refrigerant channel (33) is close to the inner and outer circumferences of the annular section (32) on both sides. The inner diameter of the annular section (32) is R1, the inner diameter of the shaft mounting hole (31) is R2, the outer diameter of the first connecting end (12) is R3, and the inner diameter of the second connecting end (22) is R4. The rotor assembly has the following relationship: R1≥R3; R2≤R4; R3>R4.

8. The rotor assembly according to claim 5, characterized in that, The outer contours of the first draining member (1) and the second draining member (2) are both circular. The outer diameter of the first draining member (1) is R5, the outer diameter of the second draining member (2) is R6, and the outer diameter of the rotor (3) is R7. The rotor assembly has the following relationship: R5≤R7, R6≥R7.

9. The rotor assembly according to claim 5, characterized in that, The thickness of the first counterweight (4) is H1, the vertical distance between the bottom of the mounting hole (14) and the bottom of the first connecting end (12) is H2, and the rotor assembly has the following relationship: H1≥H2.

10. A compressor, characterized in that, The compressor includes a compressor housing (200), a pump assembly (300), a stator assembly (400), and a rotor assembly (500) as described in any one of claims 5-9. The pump assembly (300), the stator assembly (400), and the rotor assembly (500) are all disposed inside the compressor housing (200). The pump assembly (300) is connected to the rotor assembly (500), and the stator assembly (400) is sleeved on the outside of the rotor assembly (500).

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