Motor, compressor with same and air conditioning equipment

Abstract

The utility model discloses a motor, and a compressor and an air conditioning device having the same, the motor comprises a stator iron core, the radius of which is Ds; the radius of the rotor core is Dr, accommodating grooves are formed in the rotor core, a first through groove is formed between every two adjacent accommodating grooves, in the radial direction of the rotor core, the edge of the outer side of each first through groove is a first edge, the edge of the inner side of each first through groove is a second edge, the length of each first edge is L1, and the length of each second edge is L2, the distance between the first edge and the second edge is h, and 2Ds / [h * (L1 + L2) * Dr] is larger than or equal to 0.12 / mm < 2 > and smaller than or equal to 0.17 / mm < 2 >. According to the motor provided by the embodiment of the utility model, the size of the first through groove is controlled to further control the space occupied by the first through groove on the rotor core, so that the first through groove can reduce harmonic waves of a space magnetic field, suppress armature reaction and reduce iron loss of the motor, thereby improving the saturation degree of the motor and improving the overload capacity of the motor; therefore, the efficiency of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a motor and a compressor and air-conditioning equipment having the same. Background Art

[0002] With the rapid development of the economy and the improvement of people's living standards, people's demand for high efficiency is increasing. How to optimize the design of motors to effectively reduce losses and improve efficiency has become a design highlight for achieving motor efficiency. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a motor that controls the size of a first through-slot, and thereby the space occupied by the first through-slot on the rotor core, so that the first through-slot can reduce harmonics in the spatial magnetic field, suppress armature reaction, and reduce iron loss in the motor, thereby fully improving the motor's saturation level and enhancing the motor's overload capacity, thereby improving motor efficiency.

[0004] The utility model also provides a compressor having the motor.

[0005] The utility model also provides an air-conditioning device having the compressor.

[0006] This application is based on the discovery and understanding of the following facts and problems made by the utility model:

[0007] According to the first embodiment of the present invention, the motor includes: a stator core, the stator core is formed with a through hole, the radius of the stator core is Ds; the rotor core is rotatably arranged in the through hole, the radius of the rotor core is Dr, the rotor core is provided with a plurality of accommodating grooves spaced apart in the circumferential direction of the rotor core, the accommodating grooves are suitable for accommodating permanent magnets, and a first through groove is provided between two adjacent accommodating grooves, in the radial direction of the rotor core, the outer edge of the first through groove is the first edge, the inner edge of the first through groove is the second edge, the length of the first edge is L1, the length of the second edge is L2, the spacing between the first edge and the second edge is h, and satisfies: 0.12 / mm 2 ≤2Ds / [h*(L1+L2)*Dr]≤0.17 / mm 2 .

[0008] According to the motor of the embodiment of the present invention, by controlling the size of the first through-slot, and thus controlling the space occupied by the first through-slot on the rotor core, the first through-slot can better reduce the harmonics of the spatial magnetic field, suppress the armature reaction, reduce the iron loss of the motor, and thus fully improve the saturation degree of the motor, enhance the overload capacity of the motor, thereby achieving an improvement in the efficiency of the motor.

[0009] In addition, the motor according to the above embodiment of the present invention may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the following is satisfied: 1.2*Ds / Dr≤L1 / mm≤1.6*Ds / Dr.

[0011] According to some embodiments of the present invention, the following condition is satisfied: 0.52≤Dr / Ds≤0.6.

[0012] According to some embodiments of the present invention, the first through groove is a trapezoidal groove, the first edge and the second edge are the upper base and the lower base of the trapezoid, and the distance between the first edge and the second edge is the height of the trapezoid.

[0013] According to some optional embodiments of the present invention, the accommodating slot includes a first slot portion, and in the radial direction of the rotor core, two adjacent first slot portions in two adjacent accommodating slots extend outward toward each other, and the first through slot is located between two adjacent first slot portions in two adjacent accommodating slots, wherein L1<L2.

[0014] According to some specific embodiments of the present invention, the following is satisfied: 1.5L1<L2≤1.8L1.

[0015] According to some specific embodiments of the present invention, the following is satisfied: 1.5*(L2-L1)≤h≤1.9*(L2-L1).

[0016] According to some specific embodiments of the present invention, the accommodating groove includes two first groove portions and a second groove portion, the first groove portion extends along the radial direction of the rotor core, and in the radial direction of the rotor core, the two first groove portions of the accommodating groove extend outward in a direction away from each other, and the second groove portion connects the inner ends of the two first groove portions.

[0017] According to some embodiments of the present invention, at least one second through slot is further provided on a side of the accommodating slot close to the outer edge of the rotor core.

[0018] According to some optional embodiments of the present invention, the second through-groove is a rectangular groove; or, the second through-groove includes a plurality of connected rectangular grooves, and an angle is formed between two connected rectangular grooves; or, the second through-groove is a fan-shaped groove; or, the second through-groove is an oblong groove; or, the second through-groove includes a plurality of connected oblong grooves, and an angle is formed between two connected oblong grooves.

[0019] According to some embodiments of the present invention, a third through slot is provided on the outer circumference of the rotor core.

[0020] According to an embodiment of a second aspect of the present invention, a compressor is provided. The compressor includes the motor according to the embodiment of the first aspect of the present invention.

[0021] According to the compressor of the embodiment of the present invention, by utilizing the motor described in the embodiment of the first aspect of the present invention, the size of the first through-slot is controlled, and then the space occupied by the first through-slot on the rotor core is controlled, so that the first through-slot can better reduce the harmonics of the spatial magnetic field, suppress the armature reaction, reduce the iron loss of the motor, and thus fully improve the saturation degree of the motor, enhance the overload capacity of the motor, thereby achieving an improvement in the efficiency of the motor.

[0022] According to an embodiment of a third aspect of the present invention, an air-conditioning device is provided. The air-conditioning device includes the compressor according to the embodiment of the second aspect of the present invention.

[0023] According to the air-conditioning equipment of the embodiment of the present invention, by utilizing the compressor described in the embodiment of the second aspect of the present invention, the size of the first through-slot is controlled, and then the space occupied by the first through-slot on the rotor core is controlled, so that the first through-slot can better suppress the armature reaction, reduce the iron loss of the motor, and then fully improve the saturation degree of the motor, enhance the overload capacity of the motor, thereby achieving an improvement in the efficiency of the motor.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 1 is a schematic structural diagram of a stator core and a rotor core according to an embodiment of the present utility model;

[0027] Figure 2 1 is a schematic structural diagram of a stator core according to an embodiment of the present utility model;

[0028] Figure 3 1 is a schematic structural diagram of a rotor core according to an embodiment of the present utility model;

[0029] Figure 4 yes Figure 3 Enlarged view of area A in the middle;

[0030] Figure 5 This is a comparative example in which the first through groove is not provided;

[0031] Figure 6 is a function diagram of current and iron loss according to the embodiment of the utility model and the comparative example;

[0032] Figure 7 It is a current and efficiency function diagram according to the embodiment of the utility model and the comparative example.

[0033] Reference numerals:

[0034] 10. stator core; 11. through hole;

[0035] 20. Rotor core; 21. Accommodating slot; 211. First slot portion; 212. Second slot portion; 23. First through-slot; 231. First edge; 232. Second edge; 25. Second through-slot; 27. Third through-slot. DETAILED DESCRIPTION

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] The motor according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0038] like Figures 1-4 As shown, the motor according to the embodiment of the present invention includes a stator core 10 and a rotor core 20 .

[0039] The stator core 10 is formed with a through hole 11, and the rotor core 20 is rotatably arranged in the through hole 11. The rotor core 20 is provided with a plurality of accommodating grooves 21 arranged at intervals in the circumferential direction of the rotor core 20. The accommodating grooves 21 are suitable for accommodating permanent magnets. When the magnetic field around the permanent magnet changes and rotates, the permanent magnet is subjected to the force of the magnetic field and rotates. At this time, the permanent magnet drives the rotor core 20 to rotate, so that the rotor core 20 outputs a rotational force.

[0040] The radius of the stator core 10 is Ds, the radius of the rotor core 20 is Dr, and a first through slot 23 is provided between two adjacent accommodating slots 21. The first through slot 23 is used to reduce the harmonics of the spatial magnetic field, suppress the armature reaction, and reduce the iron loss of the motor, thereby reducing the loss of the rotor core 20 and the permanent magnet during rotation.

[0041] Specifically, the first through slot 23 can change the magnetic field near it, reduce the fluctuation of the spatial magnetic field, and thus suppress the armature reaction, reduce the iron loss of the motor, improve the motor saturation level, and enhance the motor overload capacity, thereby achieving improved motor efficiency.

[0042] In the radial direction of the rotor core 20, the outer edge of the first through slot 23 is the first edge 231, the inner edge of the first through slot 23 is the second edge 232, the length of the first edge 231 is L1, the length of the second edge 232 is L2, the spacing between the first edge 231 and the second edge 232 is h, and satisfies: 0.12 / mm 2 ≤2Ds / [h*(L1+L2)*Dr]≤0.17 / mm 2 .

[0043] By controlling the size of the first through-slot 23 and thereby controlling the space occupied by the first through-slot 23 on the rotor core 20, the first through-slot 23 on the rotor core 20 that satisfies this formula can achieve better results in improving the efficiency of the motor. Specifically, the first through-slot 23 on the rotor core 20 that satisfies this formula can better reduce the harmonics of the spatial magnetic field, suppress the armature reaction, reduce the iron loss of the motor, and thereby fully improve the saturation degree of the motor and enhance the overload capacity of the motor, thereby achieving an improvement in the efficiency of the motor.

[0044] According to the motor of the embodiment of the present invention, by controlling the size of the first through-slot 23, and thus controlling the space occupied by the first through-slot 23 on the rotor core 20, the first through-slot 23 can better reduce the harmonics of the spatial magnetic field, suppress the armature reaction, and reduce the iron loss of the motor, thereby fully improving the motor saturation level and enhancing the motor overload capacity, thereby achieving an improvement in the motor efficiency.

[0045] The following describes a motor according to a specific embodiment of the present invention with reference to the accompanying drawings.

[0046] In some specific embodiments of the present invention, Figures 1-4 As shown, the motor includes a stator core 10 and a rotor core 20 .

[0047] In some embodiments of the present invention, the following condition is satisfied: 1.2*Ds / Dr≤L1 / mm≤1.6*Ds / Dr, so as to control the relationship between the size of the stator core 10, the size of the mover core and the length of the first edge 231, so that the first through-slot 23 on the rotor core 20 that satisfies this condition can achieve better results in improving the efficiency of the motor. Specifically, the first through-slot 23 can better reduce the harmonics of the spatial magnetic field, thereby fully improving the saturation degree of the motor, improving the overload capacity of the motor, and thus achieving an improvement in the efficiency of the motor.

[0048] Specifically, 1.2*Ds / Dr≤L1 / mm to ensure the size of the first edge 231 and avoid the first edge 231 being too small, which would cause the first through-slot 23 to have poor efficiency in reducing harmonics of the spatial magnetic field. L1 / mm≤1.6*Ds / Dr is also set to avoid the size of the first edge 231 being too large, which would affect the overall strength of the rotor core 20.

[0049] In some embodiments of the present invention, the following condition is satisfied: 0.52≤Dr / Ds≤0.6, so as to control the size of the stator core 10 and the size of the rotor core 20, thereby ensuring the rotor inertia while taking into account the electromagnetic performance of the motor.

[0050] In some embodiments of the present invention, Figure 4 As shown, the first through groove 23 is a trapezoidal groove, the first edge 231 and the second edge 232 are the upper and lower bases of the trapezoid, and the distance between the first edge 231 and the second edge 232 is the height of the trapezoid.

[0051] Since the first through-groove 23 is a trapezoid, the area S of the first through-groove 23 is h*(L1+L2) / 2, so 0.12 / mm 2 ≤2Ds / [h*(L1+L2)*Dr]≤0.17 / mm 2 Converted to: 0.12 / mm 2 ≤Ds / (Dr*S)≤0.17 / mm 2 , that is: 0.12*S / mm 2 ≤Ds / Dr≤0.17*S / mm 2 In this way, by controlling the relationship between the area of ​​the first through-slot 23 and the size of the stator core 10 and the size of the rotor core 20, the first through-slot 23 provided on the rotor core 20 is made to be of appropriate size, so that the first through-slot 23 can better reduce the harmonics of the spatial magnetic field, thereby fully improving the motor saturation degree and enhancing the motor overload capacity, thereby achieving an improvement in motor efficiency.

[0052] It should be explained here that the first through slot 23 is trapezoidal, which means that the projection of the first through slot 23 in the axial direction of the rotor core 20 is a trapezoid, wherein the projection of the first through slot 23 in the circumferential direction of the rotor core 20 can be an isosceles trapezoid, a right-angled trapezoid or an ordinary trapezoid.

[0053] In some optional embodiments of the present invention, such as Figure 3 As shown, the accommodating slot 21 includes a first slot portion 211. In the radial direction of the rotor core 20, two adjacent first slot portions 211 in two adjacent accommodating slots 21 extend outward toward each other, and the first through-slot 23 is located between the two adjacent first slot portions 211 in the two adjacent accommodating slots 21, wherein L1<L2, so as to fully utilize the space between the two adjacent accommodating slots 21, so that the first through-slot 23 can better reduce the harmonics of the spatial magnetic field, thereby fully improving the motor saturation level and enhancing the motor overload capacity, thereby achieving an improvement in motor efficiency.

[0054] Preferably, the projection of the first through slot 23 in the circumferential direction of the rotor core 20 is an isosceles trapezoid, and the waist of the isosceles trapezoid is parallel to the adjacent first slot portion 211 , so as to fully utilize the space between adjacent accommodating slots 21 .

[0055] In some specific embodiments of the present invention, the following condition is satisfied: 1.5L1<L2≤1.8L1, so as to control the length relationship between the upper base and the lower base of the trapezoid, and further control the size of the first through-groove 23, so that the first through-groove 23 can fully utilize the space between two adjacent accommodating grooves 21, so that the first through-groove 23 can better reduce the harmonics of the spatial magnetic field, and further fully improve the motor saturation degree, enhance the motor overload capacity, and thus achieve an improvement in motor efficiency.

[0056] In some specific embodiments of the present invention, the following condition is satisfied: 1.5*(L2-L1)≤h≤1.9*(L2-L1), so as to control the relationship between the upper base, lower base and height of the trapezoid, and further control the size of the first through-slot 23, so that the first through-slot 23 can fully utilize the space between two adjacent accommodating slots 21, so that the first through-slot 23 can better reduce the harmonics of the spatial magnetic field, and further fully improve the motor saturation degree, enhance the motor overload capacity, and thus achieve an improvement in motor efficiency.

[0057] In some specific embodiments of the present invention, Figure 3As shown, the accommodating slot 21 includes two first slot portions 211 and a second slot portion 212. The first slot portion 211 extends radially along the rotor core 20. In the radial direction of the rotor core 20, the two first slot portions 211 of the accommodating slot 21 extend outward in a direction away from each other, and the second slot portion 212 connects the inner ends of the two first slot portions 211. This makes it easy to fully utilize the space on the rotor core 20 to set larger permanent magnets on the rotor core 20, thereby increasing the power output of the rotor core 20.

[0058] The first groove portion 211 is extended along the radial direction of the rotor core 20 to reduce interference between the permanent magnets and thereby reduce energy loss.

[0059] In some embodiments of the present invention, Figure 3 As shown, at least one second through slot 25 is further provided on one side of the accommodating slot 21 close to the outer edge of the rotor core 20 . The second through slot 25 is used to guide the magnetic circuit, improve the direction of the magnetic lines of force, and thus reduce harmonics.

[0060] In some embodiments, the second through-groove 25 is a rectangular groove.

[0061] In other embodiments, the second through-groove 25 includes a plurality of connected rectangular grooves, and an angle is formed between any two connected rectangular grooves.

[0062] In other embodiments, the second through groove 25 is a fan-shaped annular groove.

[0063] In other embodiments, the second through-groove 25 is an oblong groove.

[0064] In other embodiments, the second through-groove 25 includes a plurality of connected oblong grooves, and an angle is formed between any two connected oblong grooves.

[0065] It should be explained here that the oblong groove includes a rectangular groove and two semicircular grooves; or, the oblong groove includes a rectangular groove and two arcuate grooves, and the two semicircular grooves or two arcuate grooves are located on both sides of the rectangular groove.

[0066] In summary, the shape of the second through slot 25 can match the shape of the corresponding space on the rotor core 20 to fully utilize the space on the rotor core 20, so that the second through slot 25 can fully guide the magnetic circuit, improve the direction of the magnetic lines of force, and thus reduce harmonics.

[0067] In some embodiments of the present invention, a third through slot 27 is provided on the outer circumference of the rotor core 20 . The third through slot 27 is used to reduce the torque pulsation of the motor.

[0068] In some embodiments, a plurality of third through-slots 27 are defined along the outer periphery of the rotor core 20. This reduces the harmonic content of the air gap flux density, thereby reducing eddy current losses in the motor, improving its operating efficiency, and lowering its temperature rise. Furthermore, this approach reduces torque ripple, resulting in smoother motor operation and effectively controlled noise, thereby optimizing motor performance.

[0069] like Figure 4 As shown, in some embodiments, the third through slot 27 includes at least one of a rectangular slot, a fan-shaped slot, and a curved slot, so that the outer edge of the rotor core 20 is not a complete circle, thereby reducing the harmonic content of the air gap magnetic density, reducing the eddy current loss of the motor, and improving the operating efficiency of the motor.

[0070] The following introduces a comparative example in which the first through groove 23 is not provided. Figure 5 As shown, the rotor core 20 is not provided with the first through slot 23 .

[0071] The stator core 10 is provided with a plurality of stator windings. By supplying current to the stator windings, a rotating magnetic field is generated near the permanent magnets on the rotor core 20 , thereby realizing the rotation of the permanent magnets and the rotor core 20 .

[0072] like Figure 6 As shown, the current passed through the stator winding is used as the independent variable, and the iron loss of the motor is used as the dependent variable. Experiments are conducted on the comparative example and the stator core 10 respectively.

[0073] like Figure 7 As shown, the current passed through the stator winding is used as the independent variable, and the efficiency of the motor is used as the dependent variable. Experiments are conducted on the comparative example and the stator core 10 respectively.

[0074] like Figure 6 As shown, Q1 is the iron loss of the motor when different currents are passed through the stator winding in the embodiment of the present invention, and Q2 is the iron loss of the motor when different currents are passed through the stator winding in the comparative example.

[0075] By comparing Q1 and Q2, it can be clearly concluded that when the same current is passed through, the iron loss of the motor provided with the first through slot 23 is smaller, thereby achieving the purpose of reducing the iron loss of the motor.

[0076] like Figure 7 As shown, W1 is the motor efficiency when different currents are passed through the stator winding in the embodiment of the present invention, and W2 is the motor efficiency when different currents are passed through the stator winding in the comparative example.

[0077] By comparing W1 and W2 , it can be clearly concluded that when the same current is supplied, the motor provided with the first through slot 23 has higher efficiency, thereby achieving the purpose of improving the motor efficiency.

[0078] The following describes a compressor according to an embodiment of the present invention. The compressor according to the embodiment of the present invention includes the motor according to the above embodiment of the present invention.

[0079] According to the compressor of the embodiment of the present invention, by utilizing the motor according to the above-mentioned embodiment of the present invention, the size of the first through-slot 23 is controlled, and then the space occupied by the first through-slot 23 on the rotor core 20 is controlled, so that the first through-slot 23 can better reduce the harmonics of the spatial magnetic field, thereby fully improving the motor saturation degree and enhancing the motor overload capacity, thereby achieving an improvement in the motor efficiency.

[0080] Other structures and operations of the compressor according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0081] The following describes an air conditioning device according to an embodiment of the present invention. The air conditioning device according to the embodiment of the present invention includes the compressor according to the above embodiment of the present invention.

[0082] According to the air-conditioning equipment of the embodiment of the present invention, by utilizing the motor according to the above-mentioned embodiment of the present invention, by controlling the size of the first through-slot 23, and then controlling the space occupied by the first through-slot 23 on the rotor core 20, the first through-slot 23 can better reduce the harmonics of the spatial magnetic field, thereby fully improving the motor saturation degree and enhancing the motor overload capacity, thereby achieving an improvement in motor efficiency.

[0083] Other structures and operations of the air-conditioning device according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0084] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0085] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0086] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0087] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does 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 any one or more embodiments or examples.

[0088] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that: include: a stator core, wherein the stator core is formed with a through hole, and the radius of the stator core is Ds; The rotor core is rotatably disposed in the through hole, the radius of the rotor core is Dr, and the rotor core is provided with a plurality of accommodating grooves spaced apart in the circumferential direction of the rotor core, the accommodating grooves being suitable for accommodating permanent magnets, and a first through groove being provided between two adjacent accommodating grooves. In the radial direction of the rotor core, the outer edge of the first through slot is the first edge, the inner edge of the first through slot is the second edge, the length of the first edge is L1, the length of the second edge is L2, the spacing between the first edge and the second edge is h, and satisfies: 0.12 / mm 2 ≤2Ds / [h*(L1+L2)*Dr]≤0.17 / mm 2 .

2. The motor according to claim 1, characterized in that Satisfies: 1.2*Ds / Dr≤L1 / mm≤1.6*Ds / Dr.

3. The motor according to claim 1, characterized in that Satisfies: 0.52≤Dr / Ds≤0.

6.

4. The motor according to any one of claims 1 to 3, characterized in that The first through groove is a trapezoidal groove, the first edge and the second edge are the upper base and the lower base of the trapezoid, and the distance between the first edge and the second edge is the height of the trapezoid.

5. The motor according to claim 4, characterized in that The accommodating slot includes a first slot portion. In the radial direction of the rotor core, two adjacent first slot portions of two adjacent accommodating slots extend outward toward each other, and the first through slot is located between the two adjacent first slot portions of the two adjacent accommodating slots. Wherein, L1<L2.

6. The motor according to claim 5, characterized in that Satisfies: 1.5L1<L2≤1.8L1.

7. The motor according to claim 5, characterized in that Satisfies: 1.5*(L2-L1)≤h≤1.9*(L2-L1).

8. The motor according to claim 5, characterized in that The accommodating groove includes two first groove portions and a second groove portion, the first groove portion extends along the radial direction of the rotor core, and in the radial direction of the rotor core, the two first groove portions of the accommodating groove extend outward in a direction away from each other, and the second groove portion connects the inner ends of the two first groove portions.

9. The motor according to claim 1, characterized in that At least one second through slot is further provided on a side of the accommodating slot close to the outer edge of the rotor core.

10. The motor according to claim 9, characterized in that The second through-groove is a rectangular groove; Alternatively, the second through groove comprises a plurality of connected rectangular grooves, and an angle is formed between two connected rectangular grooves; Alternatively, the second through groove is a fan-shaped annular groove; Alternatively, the second through-groove is an oblong groove; Alternatively, the second through groove includes a plurality of connected oblong grooves, and an angle is formed between any two connected oblong grooves.

11. The motor according to claim 1, characterized in that A third through slot is provided on the outer circumference of the rotor core.

12. A compressor, characterized in that: Comprising the electric machine according to any one of claims 1-11.

13. An air conditioning device, characterized in that: Comprising the compressor of claim 12.

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