Stator assembly, motor, compressor and air conditioner

Abstract

The present application relates to the field of air conditioners. Disclosed are a stator assembly (1), a motor (20), a compressor (30) and an air conditioner (40). The stator assembly (1) according to the present application comprises a stator core (11), a plurality of tooth parts (111) arranged at intervals in the circumferential direction being formed on the stator core (11). Yoke parts (112) are formed between every two adjacent tooth parts (111), the tooth parts (111) and the yoke parts (112) jointly defining stator slots (113) used for accommodating a winding. First outer walls (101) protruding outwards in the radial direction are formed on the periphery of the stator core (11), included angles being formed between two ends of each first outer wall (101) and a stator center (105). There are provided a plurality of first outer walls (101), the sum of the included angles between the plurality of first outer walls (101) and the stator center (105) being X1 and satisfying: 180°≤X1≤300°.

Description

Stator assembly, motor, compressor and air conditioner

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410496043.7, filed on April 24, 2024, entitled “Stator Assembly, Motor, Compressor and Air Conditioner”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of air conditioners, and in particular to a stator assembly, motor, compressor and air conditioner. Background Technology

[0004] As the core component of a compressor, the motor's structural design directly affects the overall performance of the compressor, including its vibration and noise levels, oil circulation rate, energy efficiency, and reliability. However, the stator stiffness and stator oil passage area of ​​the compressor motor are mutually restrictive. To improve user experience, higher motor stiffness and lower noise are desirable. To meet compressor reliability requirements, a larger oil passage area is preferable. However, increasing the stator oil passage area reduces stator stiffness, leading to increased motor vibration and noise, which in turn increases compressor vibration and noise. Conversely, to reduce motor noise and increase stiffness, the stator flow hole area needs to be reduced. However, reducing the flow hole area decreases the compressor's oil circulation rate. Therefore, low-noise, high-oil-circulation-rate compressors have become a research goal in the industry. In existing technologies, due to unreasonable stator structure design, it is difficult to achieve a balance between stiffness and oil passage area. This often results in excessive motor noise and high oil discharge rates, severely impacting motor performance and user experience.

[0005] Application content

[0006] This application aims to at least partially address one of the technical problems in the related art.

[0007] Therefore, one objective of this application is to provide a stator assembly.

[0008] Another objective of this application is to provide an electric motor having the aforementioned stator assembly.

[0009] Another objective of this application is to provide a compressor having the aforementioned motor.

[0010] Another objective of this application is to provide an air conditioner having the aforementioned compressor.

[0011] The stator assembly according to this application includes a stator core, on which a plurality of teeth are formed at intervals in the circumferential direction, and a yoke is formed between two adjacent teeth. The teeth and the yoke together define stator slots for accommodating windings. A first outer wall is formed on the outer periphery of the stator core, which is radially outwardly protruding. The two ends of the first outer wall form an angle with the center of the stator. The first outer wall is constructed in a plurality of cases, and the sum of the angles between the plurality of first outer walls and the center of the stator is X1, which satisfies: "180°≤X1≤300°".

[0012] The stator assembly according to this application includes a stator core with teeth arranged at circumferential intervals. A yoke is formed between adjacent teeth, and the two adjacent teeth and the yoke together define a stator slot for accommodating windings. Multiple first outer walls are formed on the outer periphery of the stator core, spaced circumferentially and protruding radially outwards. During assembly, these first outer walls can cooperate with other structures in the stator assembly to improve the stability of the stator core assembly. The two ends of each first outer wall form an angle with the stator center, and the sum of the angles between the multiple first outer walls and the stator center is X1, satisfying 180°≤X1≤300°. This improves the stiffness of the stator assembly while maintaining the area for cooling oil flow, thereby reducing motor noise and improving oil discharge rate.

[0013] According to one embodiment of this application, the stator core is provided with Q teeth and n first outer walls; wherein, the maximum value of the included angle formed by the two ends of the first outer wall and the center of the stator is X1m, and satisfies: "X1m≥360° / Q".

[0014] According to one embodiment of this application, Q / n≥1.

[0015] According to one embodiment of this application, at least two of the angles between the first outer wall and the center of the stator are different.

[0016] According to one embodiment of this application, the outer periphery of the stator core is further provided with a radially inwardly recessed second outer wall, the second outer wall defining an oil passage suitable for the flow of cooling oil.

[0017] According to one embodiment of this application, at least one tooth is disposed circumferentially between two adjacent first outer walls and is radially opposite to the second outer wall.

[0018] According to one embodiment of this application, a third outer wall and a fourth outer wall are formed on the stator core. The third outer wall and the fourth outer wall are located on both sides of the second outer wall in the circumferential direction and are respectively recessed in the radial direction. The shape of at least one of the third outer wall and the fourth outer wall is different from the shape of the second outer wall.

[0019] According to one embodiment of this application, the second outer wall, the third outer wall, and the fourth outer wall are respectively formed by straight line segments and / or curved segments.

[0020] According to one embodiment of this application, the first outer wall includes a first sub-outer wall and a second sub-outer wall, wherein the first sub-outer wall is radially opposite to at least one of the teeth; the second sub-outer wall is radially opposite to the stator slot; wherein the included angle α1 formed by the first sub-outer wall and the stator center is greater than the included angle α2 formed by the second sub-outer wall and the stator center.

[0021] According to one embodiment of this application, the first sub-outer wall is configured to be a plurality of spaced-apart from the outer periphery of the stator core, the second sub-outer wall is disposed between two adjacent first sub-outer walls, and at least one of a third outer wall, a fourth outer wall and a second outer wall is disposed between the second sub-outer wall and the adjacent first sub-outer wall.

[0022] According to one embodiment of this application, at least one second sub-outer wall is disposed between two adjacent first sub-outer walls, and at least one of the second outer wall, the third outer wall, and the fourth outer wall is disposed between two adjacent second sub-outer walls.

[0023] The motor according to this application is briefly described below.

[0024] The motor according to this application includes the stator assembly in the above embodiments. Since the motor according to this application is provided with the stator assembly in the above embodiments, when the stator assembly is assembled with the motor, the stator assembly has multiple first outer walls reasonably arranged on the outer periphery of the stator core, so that the sum of the included angles between the multiple first outer walls and the center of the stator is between 180° and 300°. This improves the rigidity of the stator assembly while ensuring the oil passage area of ​​the stator assembly, which can effectively reduce the noise generated by the motor operation and avoid excessive oil discharge rate of the motor.

[0025] The compressor according to this application is briefly described below.

[0026] The compressor according to this application includes the motor and housing as described in the above embodiments. The housing has a cavity suitable for housing the motor. Since the compressor according to this application is equipped with the motor as described in the above embodiments, when the motor is assembled into the cavity of the compressor, the housing can prevent the motor from directly contacting the external structure, thereby improving the safety of the motor. At the same time, by reasonably setting the first outer wall on the stator assembly, the rigidity of the stator assembly is improved while maintaining a certain oil passage area, which can reduce the noise of the compressor during operation and ensure the oil discharge rate of the compressor.

[0027] The air conditioner according to this application is briefly described below.

[0028] The air conditioner according to this application includes the compressor in the above embodiments. Since the air conditioner according to this application is equipped with the compressor in the above embodiments, when the compressor is assembled with the air conditioner, the compressor itself has a low oil discharge rate, which can improve the service life and efficiency of the compressor, thereby improving the safety of the air conditioner. In addition, the compressor has low noise, which can improve the user experience of the air conditioner.

[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0030] Figure 1 is a schematic diagram of the layout of the first outer wall of a stator assembly according to an embodiment of the present application;

[0031] Figure 2 is a structural diagram of a stator assembly according to an embodiment of this application;

[0032] Figure 3 is a schematic diagram of a stator assembly according to another embodiment of this application;

[0033] Figure 4 is a structural diagram of the stator lamination of the stator assembly in the embodiment of Figure 3;

[0034] Figure 5 is a structural diagram of an internal stator assembly of a motor according to an embodiment of this application;

[0035] Figure 6 is a structural diagram of a compressor according to an embodiment of this application;

[0036] Figure 7 is a graph showing the variation of stator stiffness and compressor oil discharge rate according to an embodiment of this application;

[0037] Figure 8 is a diagram showing the relationship between an air conditioner and a compressor according to an embodiment of this application.

[0038] Figure label:

[0039] Stator assembly 1;

[0040] Stator core 11, teeth 111, yoke 112, stator slot 113;

[0041] First outer wall 101, first sub-outer wall 1011, second sub-outer wall 1012, second outer wall 102, third outer wall 103, fourth outer wall 104, stator center 105;

[0042] Motor 20, compressor 30, housing 301, air conditioner 40. Embodiments of the present invention

[0043] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0044] As the core component of a compressor, the motor's structural design directly affects the overall performance of the compressor, including its vibration and noise levels, oil circulation rate, energy efficiency, and reliability. However, the stator stiffness and stator oil passage area of ​​the compressor motor are mutually restrictive. To improve user experience, higher motor stiffness and lower noise are desirable. To meet compressor reliability requirements, a larger oil passage area is preferable. However, increasing the stator oil passage area reduces stator stiffness, leading to increased motor vibration and noise, which in turn increases compressor vibration and noise. Conversely, to reduce motor noise and increase stiffness, the stator flow hole area needs to be reduced. However, reducing the flow hole area decreases the compressor's oil circulation rate. Therefore, low-noise, high-oil-circulation-rate compressors have become a research goal in the industry. In existing technologies, due to unreasonable stator structure design, it is difficult to achieve a balance between stiffness and oil passage area. This often results in excessive motor noise and high oil discharge rates, severely impacting motor performance and user experience.

[0045] The stator assembly according to an embodiment of this application is described below with reference to Figures 1-8.

[0046] The stator assembly 1 according to this application includes a stator core 11, on which a plurality of teeth 111 are formed at intervals in the circumferential direction, and a yoke 112 is formed between two adjacent teeth 111. The teeth 111 and the yoke 112 together define a stator slot 113 for accommodating the winding. A first outer wall 101 is formed on the outer periphery of the stator core 11, which protrudes radially outward. The two ends of the first outer wall 101 form an angle with the stator center 105. The first outer wall 101 is constructed in a plurality of ways, and the sum of the angles between the plurality of first outer walls 101 and the stator center 105 is X1, which satisfies: "180°≤X1≤300°".

[0047] The stator assembly 1 according to this application includes a stator core 11, on which teeth 111 are provided. Multiple teeth 111 are arranged circumferentially on the stator core 11, and a yoke 112 is formed between adjacent teeth 111. The two adjacent teeth 111 and the yoke 112 together define a stator slot 113, which can be used to accommodate windings. Multiple first outer walls 101 are formed on the outer periphery of the stator core 11. These first outer walls 101 are spaced circumferentially on the stator core 11 and protrude radially outwards. During assembly, the multiple first outer walls 101 can cooperate with other structures of the stator assembly 1 to improve the stability of the stator core 11 assembly. The two ends of the first outer wall 101 form an angle with the stator center 105. The sum of the angles between the multiple first outer walls 101 and the stator center 105 is X1, as shown in Figure 1. X1 = X11 + X12 + X13 + X14 + X15 + X16, and satisfies 180° ≤ X1 ≤ 300°. It can be understood that the sum of the angles between the multiple first outer walls 101 and the stator center 105 is in the range of 180° to 300°. Since the first outer wall 101 protrudes radially outward, the arrangement of the first outer wall 101 will affect the structural strength of the stator assembly 1 and the area of ​​the circulating cooling oil around the stator core 11.

[0048] Understandably, since the first outer wall 101 is disposed on the outer peripheral wall of the stator core 11 and protrudes outward in the radial direction, the first outer wall 101 can increase the stiffness of the stator core 11. The larger the angle formed between the first outer wall 101 and the stator center 105, the longer the arc length of the first outer wall 101. When the arc length of the first outer wall 101 increases, the area of ​​the first outer wall 101 covering the outer surface of the stator core 11 increases. At this time, the oil circulation area on the outer peripheral surface of the stator core 11 will decrease. Therefore, adjusting the angle formed between the first outer wall 101 and the stator center 105 can adjust the stiffness and oil circulation area of ​​the stator assembly 1.

[0049] Specifically, regarding the stiffness of the stator assembly 1, when the sum of the angles between the multiple first outer walls 101 and the stator center 105 is less than 180°, the stiffness of the stator assembly 1 is relatively small; conversely, when the sum of the angles between the multiple first outer walls 101 and the stator center 105 is greater than 300°, the stiffness of the stator assembly 1 approaches a fixed value. Regarding the flow area of ​​the cooling oil in the stator assembly 1, when the sum of the angles between the multiple first outer walls 101 and the stator center 105 is less than 180°, the flow area of ​​the cooling oil around the stator core 11 is larger, which can reduce the oil discharge rate of the compressor 30 that cooperates with the stator assembly 1; when the sum of the angles between the multiple first outer walls 101 and the stator center 105 is greater than 300°, the flow area of ​​the cooling oil around the stator core 11 is smaller, which will lead to an increase in the oil discharge rate of the compressor 30 that cooperates with the stator assembly 1. In summary, when the sum of the angles between the multiple first outer walls 101 and the stator center 105 is within the range of 180° to 300°, the rigidity of the stator assembly 1 can be improved while maintaining the area of ​​the stator assembly 1 through which cooling oil flows, so that the stator assembly 1 can reduce the noise of the motor 20 and improve the oil discharge rate of the motor 20.

[0050] As shown in Figure 7, when the value of X1 is less than 180°, the stator stiffness changes significantly. This can be understood as the sum of the arc lengths of the first outer wall 101 within this range severely affecting the stiffness of the stator assembly 1. However, the oil discharge rate of the compressor 30 remains relatively stable at this time. When the stiffness is low, the compressor 30 generates significant noise. When the value of X1 is greater than 300°, the stator stiffness tends to stabilize. This can also be understood as the sum of the arc lengths of the first outer wall 101 within this range not significantly affecting the stator stiffness. However, the oil discharge rate of the compressor 30 increases with the increase of X1. When the oil discharge rate is too high, it reduces the service life and efficiency of the compressor 30. Therefore, to ensure the stiffness of the stator assembly 1 and the oil discharge rate of the compressor 30, the value of X1 needs to be between 180° and 300°.

[0051] In some embodiments, the value of X1 can be 180°, 200°, 220°, 240°, 260°, 280°, 300°, etc.

[0052] According to one embodiment of this application, the stator core 11 is provided with Q teeth 111 and n first outer walls 101; wherein, the maximum value of the included angle formed by the two ends of the first outer wall 101 and the stator center 105 is X1m, and satisfies: "X1m≥360° / Q". Specifically, the stator core 11 has n first outer walls 101 on its outer periphery and Q teeth 111 on its inner periphery. The largest angle formed by the n first outer walls 101 and the stator center 105 is X1m. This can be understood as the first outer wall 101 with the longest arc length among the n first outer walls 101, and the angle formed by this first outer wall 101 and the stator center 105 is X1m, which satisfies X1m≥360° / Q. This means that the angle formed by the first outer wall 101 with the longest arc length and the stator center 105 is greater than or equal to the angle formed by the teeth 111 and the stator center 105. This arrangement can increase the circumferential length of the first outer walls 101 and improve the rigidity of the stator assembly 1.

[0053] According to one embodiment of this application, Q / n≥1. As shown in Figure 2, Q represents the number of teeth 111 and n represents the number of first outer walls 101. In this embodiment, Q / n≥1 can be understood as the number of teeth 111 being equal to or greater than the number of first outer walls 101. For example, there can be 12 teeth 111 and 6 first outer walls 101. This arrangement allows the first outer walls 101 to be arranged in a way that balances the stiffness of the stator assembly 1 with the setting of the oil passage area, enabling the stator assembly 1 to improve stiffness while reducing the oil discharge rate.

[0054] According to one embodiment of this application, at least two of the first outer walls 101 have different angles relative to the stator center 105. In actual manufacturing, at least two first outer walls 101 with different arc lengths can be constructed from among the multiple first outer walls 101, meaning that the angles formed by at least two first outer walls 101 and the stator center 105 can be different. This arrangement allows for the diversification of the first outer walls 101, enabling them to be adapted to different specifications of motors 20 during assembly, thus improving the versatility of the stator assembly 1.

[0055] According to one embodiment of this application, the stator core 11 is provided with a radially inwardly recessed second outer wall 102 on its outer periphery, the second outer wall 102 defining an oil passage suitable for the flow of cooling oil.

[0056] Specifically, the stator assembly 1 also has a second outer wall 102 that is radially recessed inward on the outer periphery of the stator core 11. The second outer wall 102 is radially recessed inward, which can form an oil channel for the flow of cooling oil, thereby realizing the cooling function of the stator assembly 1.

[0057] According to one embodiment of this application, at least one tooth 111 is disposed between two adjacent first outer walls 101 in the circumferential direction and is radially opposite to the second outer wall 102. As shown in FIG4, the stator core 11 can be formed by stacking multiple stator laminations. On the stator laminations, at least one tooth 111 is disposed between two adjacent first outer walls 101, and the tooth 111 is radially opposite to the second outer wall 102. The tooth 111 being directly opposite to the second outer wall 102 can improve the structural strength of the location where the second outer wall 102 is disposed. At the same time, the tooth 111 being disposed between two adjacent first outer walls 101 can strengthen the connection strength between the first outer wall 101 and the second outer wall 102, thereby improving the rigidity of the stator assembly 1.

[0058] According to one embodiment of this application, a third outer wall 103 and a fourth outer wall 104 are formed on the stator core 11. The third outer wall 103 and the fourth outer wall 104 are located on both sides of the second outer wall 102 in the circumferential direction and are respectively recessed radially inward. The shape of at least one of the third outer wall 103 and the fourth outer wall 104 is different from the shape of the second outer wall 102. Specifically, the stator core 11 is further provided with a third outer wall 103 and a fourth outer wall 104, which are located on both sides of the second outer wall 102 in the circumferential direction. Both the third outer wall 103 and the fourth outer wall 104 are recessed radially inward in the stator assembly 1. Similar to the second outer wall 102, the third outer wall 103 and the fourth outer wall 104 can also form oil channels, further improving the cooling effect of the stator assembly 1. It is worth noting that at least one of the third outer wall 103 and the fourth outer wall 104 has a shape different from that of the second outer wall 102. This can be understood as follows: during processing, the third outer wall 103, the fourth outer wall 104, and the second outer wall 102 are all different, or the third outer wall 103 and the fourth outer wall 104 have the same shape, but the shape is different from that of the second outer wall 102. The shape setting scheme of the third outer wall 103 and the fourth outer wall 104 compared to the second outer wall 102 can achieve error prevention in the manufacturing of the stator assembly 1.

[0059] According to one embodiment of this application, the second outer wall 102, the third outer wall 103, and the fourth outer wall 104 are formed by straight segments and / or curved segments, respectively. Specifically, as shown in Figures 3-4, the second outer wall 102 can be composed of both straight segments and curved segments, while the third outer wall 103 and the fourth outer wall 104 can be composed of curved segments. The method of constructing the second outer wall 102, the third outer wall 103, and the fourth outer wall 104 with straight segments and curved segments diversifies the oil channels for cooling oil flow and increases the contact area between the cooling oil and the stator assembly 1, thereby improving the cooling effect.

[0060] In some embodiments, the center of the second outer wall 102 may be a groove formed by a straight line segment. The groove is designed to prevent the second outer wall 102 from abutting against other structures of the stator assembly 1, so as to avoid the stator core 11 from rotating incorrectly during operation.

[0061] According to one embodiment of this application, the first outer wall 101 includes a first sub-outer wall 1011 and a second sub-outer wall 1012. The first sub-outer wall 1011 is radially opposite to at least one tooth 111; the second sub-outer wall 1012 is radially opposite to the stator slot 113; wherein the included angle α1 formed by the first sub-outer wall 1011 and the stator center 105 is greater than the included angle α2 formed by the second sub-outer wall 1012 and the stator center 105.

[0062] Specifically, the first outer wall 101 may include a first sub-outer wall 1011 and a second sub-outer wall 1012. It can be understood that, in this embodiment, the first outer wall 101 has two types, namely a first sub-outer wall 1011 and a second sub-outer wall 1012. The first sub-outer wall 1011 is radially aligned with at least one tooth 111 so that the tooth 111 can support the position of the first sub-outer wall 1011 and improve the structural strength of the first sub-outer wall 1011. The second sub-outer wall 1012 is radially aligned with the stator slot 113. The radial outward protrusion of the second sub-outer wall 1012 can increase the radial dimension of the yoke 112 and thus improve the structural strength of the yoke 112. Meanwhile, the angle formed by the first sub-outer wall 1011 and the stator center 105 is α1, and the angle formed by the second sub-outer wall 1012 and the stator center 105 is α2, and α1>α2. This can also be understood as the arc length of the first sub-outer wall 1011 being greater than the arc length of the second sub-outer wall 1012. The stator assembly 1 has a first outer wall 101 with a different arc length on the outer periphery of the stator core 11, which further improves the rigidity of the outer periphery of the stator assembly 1.

[0063] According to one embodiment of this application, a plurality of first sub-outer walls 1011 are configured to be spaced apart on the outer periphery of the stator core 11, and a second sub-outer wall 1012 is disposed between two adjacent first sub-outer walls 1011. At least one of a third outer wall 103, a fourth outer wall 104, and a second outer wall 102 is disposed between the second sub-outer wall 1012 and the adjacent first sub-outer wall 1011. Specifically, as shown in Figures 3-4, the stator assembly 1 has the second sub-outer wall 1012 disposed between two adjacent first sub-outer walls 1011, such that the first sub-outer walls 1011 and the second outer wall 1012 are arranged sequentially at intervals, thereby improving the rigidity of the stator assembly 1. Meanwhile, the third outer wall 103 or the fourth outer wall 104 can be disposed between the second sub-outer wall 1012 and the adjacent first sub-outer wall 1011, so that the circumferential sides of the radially inwardly recessed third outer wall 103 or the fourth outer wall 104 are connected to the radially outwardly protruding first outer wall 101, thereby further improving the rigidity of the stator assembly 1.

[0064] In other embodiments, the second outer wall 102 may also be disposed between the second sub-outer wall 1012 and the adjacent first sub-outer wall 1011. Alternatively, at least one of the third outer wall 103 and the fourth outer wall 104 may be disposed between the second sub-outer wall 1012 and the adjacent first sub-outer wall 1011, along with the second outer wall 102. The specific arrangement can be determined according to the actual situation.

[0065] According to one embodiment of this application, at least one second sub-outer wall 1012 is provided between two adjacent first sub-outer walls 1011, and at least one of a second outer wall 102, a third outer wall 103, and a fourth outer wall 104 is provided between two adjacent second sub-outer walls 1012. Preferably, multiple second sub-outer walls 1012 can also be provided between two adjacent first sub-outer walls 1011. For example, as shown in Figures 3-4, two second sub-outer walls 1012 can be provided between two adjacent first sub-outer walls 1011, and a second outer wall 102 can be provided between two adjacent second sub-outer walls 1012. Thus, the local outer periphery of the stator core 11 is connected in the circumferential direction by two second sub-outer walls 1011 and one second outer wall 102 is connected between two second sub-outer walls 1012. The second outer wall 102 is connected to the first outer wall 101, thereby improving the stiffness of the stator core 11.

[0066] In some other embodiments, a third outer wall 103 or a fourth outer wall 104 may be provided between two adjacent second sub-outer walls 1012, or both a third outer wall 103 and a fourth outer wall 104 may be provided simultaneously.

[0067] The motor 20 according to this application is briefly described below.

[0068] The motor 20 according to this application includes the stator assembly 1 in the above embodiments. Since the motor 20 according to this application is provided with the stator assembly 1 in the above embodiments, when the stator assembly 1 is assembled with the motor 20, the stator assembly 1 reasonably arranges multiple first outer walls 101 on the outer periphery of the stator core 11, so that the sum of the included angles between the multiple first outer walls 101 and the stator center 105 is between 180° and 300°. This improves the rigidity of the stator assembly 1 while ensuring the oil passage area of ​​the stator assembly 1, which can effectively reduce the noise generated by the operation of the motor 20 and avoid the excessive oil discharge rate of the motor 20.

[0069] The compressor 30 according to this application is briefly described below.

[0070] The compressor 30 according to this application includes the motor 20 and housing 301 as described in the above embodiments. The housing 301 has a cavity suitable for accommodating the motor 20. Since the compressor 30 according to this application is provided with the motor 20 as described in the above embodiments, when the motor 20 is assembled into the cavity of the compressor 30, the housing 301 can prevent the motor 20 from directly contacting the external structure, thereby improving the safety of the motor 20. At the same time, by reasonably setting the first outer wall 101 on the stator assembly 1, the motor 20 improves the rigidity of the stator assembly 1 while maintaining a certain oil passage area, which can reduce the noise of the compressor 30 during operation and ensure the oil discharge rate of the compressor 30.

[0071] The air conditioner 40 according to this application is briefly described below.

[0072] The air conditioner 40 according to this application includes the compressor 30 in the above embodiments. Since the air conditioner 40 according to this application is provided with the compressor 30 in the above embodiments, when the compressor 30 is assembled with the air conditioner 40, the compressor 30 itself has a low oil discharge rate, which can improve the service life and efficiency of the compressor 30, thereby improving the safety of the air conditioner 40. In addition, the compressor 30 has low noise, which can improve the user experience of the air conditioner 40.

[0073] It should be noted that the labels X11, X12, X13, X14, X15, X16 and X1m shown in Figures 1 and 3 only indicate the angles of the corresponding included angles.

[0074] It should be noted that Figure 8 only shows the inclusion relationship between the air conditioner 40 and the compressor 30.

[0075] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0077] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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 application according to the specific circumstances.

[0078] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A stator assembly, wherein, include: A stator core having a plurality of teeth spaced apart in the circumferential direction, with a yoke formed between two adjacent teeth, the teeth and the yoke together defining stator slots for accommodating windings; The stator core has a radially outwardly protruding first outer wall on its outer periphery. The two ends of the first outer wall form an angle with the stator center. Multiple first outer walls are constructed, and the sum of the angles between the multiple first outer walls and the stator center is X1, satisfying: "180°≤X1≤300°". The stator core is provided with Q teeth and n first outer walls. The maximum value of the angle formed between the two ends of the first outer wall and the center of the stator is X1m, and satisfies: "Q / n≥1, X1m≥360° / Q".

2. The stator assembly according to claim 1, wherein, At least two of the first outer walls have different angles relative to the center of the stator.

3. The stator assembly according to claim 2, wherein, The stator core has a radially inwardly recessed second outer wall on its outer periphery, which defines an oil passage suitable for the flow of cooling oil.

4. The stator assembly according to claim 3, wherein, At least one tooth is disposed in the circumferential direction between two adjacent first outer walls and is radially opposite to the second outer wall.

5. The stator assembly according to claim 3 or 4, wherein, The stator core has a third outer wall and a fourth outer wall. The third outer wall and the fourth outer wall are located on both sides of the second outer wall in the circumferential direction and are respectively recessed in the radial direction. The shape of at least one of the third outer wall and the fourth outer wall is different from the shape of the second outer wall.

6. The stator assembly according to claim 5, wherein, The second outer wall, the third outer wall, and the fourth outer wall are respectively formed by straight line segments and / or curved segments.

7. The stator assembly according to claim 5 or 6, wherein, The first outer wall includes: The first sub-outer wall is arranged radially opposite to at least one of the teeth; The second sub-outer wall is radially aligned with the stator slot; wherein The angle α1 formed by the first sub-outer wall and the center of the stator is greater than the angle α2 formed by the second sub-outer wall and the center of the stator.

8. The stator assembly according to claim 7, wherein, The first sub-outer wall is configured to be a plurality of spaced-apart from the outer periphery of the stator core. The second sub-outer wall is disposed between two adjacent first sub-outer walls. At least one of the third outer wall, the fourth outer wall, and the second outer wall is disposed between the second sub-outer wall and the adjacent first sub-outer wall.

9. The stator assembly according to claim 7 or 8, wherein, At least one second outer wall is provided between two adjacent first outer walls, and at least one of the second outer wall, the third outer wall, and the fourth outer wall is provided between two adjacent second outer walls.

10. An electric motor, wherein, Includes the stator assembly as described in any one of claims 1-9.

11. A compressor, wherein, include: A housing having a receiving cavity formed within it; An electric motor, which is housed within the receiving cavity, is configured as described in claim 10.

12. An air conditioner, wherein, Includes the compressor as described in claim 11.

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