Rotors, motors, compressors and refrigeration equipment

Abstract

The present invention discloses a rotor, a motor, a compressor and a refrigeration device, wherein the rotor includes a permanent magnet and a rotor core, the rotor core is provided with multiple structural groups, the structural groups include mounting grooves and n slits, n is a positive integer, the permanent magnet is provided in the mounting groove, the slit is located between the mounting groove and the outer peripheral surface of the rotor core, and the width of the slit is L n , the width of the mounting groove is b, and the total width of the n slits is ∑L n , the ∑L n =L1+L2+…+L n , the ∑L n The relationship with b is 0.1≤∑L n The technical solution of the present invention can optimize the direction of magnetic lines of force, reduce magnetic leakage, increase the utilization rate of permanent magnets, and improve the efficiency of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a rotor, a motor, a compressor and a refrigeration device. Background Art

[0002] Permanent magnet motors, with their low losses and high efficiency, are increasingly being used in today's increasingly important world of energy conservation and environmental protection. For applications such as fans, pumps, and compressors that require continuous, constant speed and unidirectional operation, conventional asynchronous motors are being replaced by permanent magnet motors due to energy waste caused by inefficiencies and power factors. Furthermore, many industrial machines require arbitrary speed settings and adjustments, but require less precise speed control. Permanent magnet synchronous motors, with their compact size and high efficiency, are becoming the primary choice for these applications.

[0003] Permanent magnet synchronous generators (PMSGs) can be categorized based on their rotor structure: surface-mounted permanent magnets and embedded permanent magnets. Compared to surface-mounted PMSGs, embedded permanent magnet generators offer longer service life and protection against sudden three-phase short circuits and demagnetization. However, for high-power PMSGs with embedded permanent magnets, the magnetic fields of adjacent magnets can easily connect, leading to magnetic flux leakage and low utilization of the permanent magnet material. Summary of the Invention

[0004] The main purpose of the present invention is to provide a rotor, aiming to reduce magnetic leakage and improve the utilization rate of permanent magnets.

[0005] To achieve the above-mentioned object, the rotor proposed in the present invention comprises:

[0006] permanent magnets; and

[0007] The rotor core is provided with multiple structural groups, each of which includes a mounting groove and n slits, where n is a positive integer. The permanent magnet is provided in the mounting groove, and the slit is located between the mounting groove and the outer peripheral surface of the rotor core. The width of the slit is L. n , the width of the mounting groove is b, and the total width of the n slits is ∑L n , the ∑L n =L1+L2+…+L n , the ∑L n The relationship with b is 0.1≤∑L n / b≤0.5.

[0008] Optionally, the width L of the slit n The value range is: 0.4mm≤L n ≤2mm.

[0009] Optionally, the width b of the mounting groove is in the range of 5 mm ≤ b ≤ 18 mm; and / or

[0010] The thickness of the mounting groove is h, and the value range of h is: 1.2mm≤h≤4.2mm.

[0011] Optionally, the number of poles of the rotor core is 6, 8 or 10.

[0012] Optionally, the mounting groove is arranged in a V shape; or

[0013] The installation groove is arranged in an "I" shape.

[0014] Optionally, the installation groove is in an axisymmetric pattern, and the n slits in each structural group are in an axisymmetric pattern relative to the symmetry axis of the installation groove; or

[0015] The n slits in each structural group may also be in an asymmetric pattern.

[0016] Optionally, the slit is arranged in a long strip shape; or

[0017] The slits are arranged in a fan shape.

[0018] Optionally, the rotor core is provided with a plurality of rivet holes, and the rivet holes are evenly arranged on the surface of the rotor core along the circumferential direction of the rotor core; and / or

[0019] The rotor core is provided with a plurality of flow holes, and the flow holes are evenly arranged on the surface of the rotor core along the circumferential direction of the rotor core.

[0020] The present invention further provides a motor, comprising a stator and the above-mentioned rotor, wherein the rotor is rotatably disposed inside the stator.

[0021] Optionally, the stator is provided with stator slots, and the number of the stator slots is 9, 12 or 15.

[0022] The present invention also provides a compressor comprising the motor according to claim 10 or 11.

[0023] The present invention also provides a refrigeration device comprising the above-mentioned compressor.

[0024] The above rotor has at least the following beneficial effects:

[0025] The technical solution of the present invention adopts a permanent magnet and a rotor core. The rotor core is provided with multiple groups of structural groups. The structural groups include mounting grooves and n slits, where n is a positive integer. The permanent magnet is provided in the mounting groove. The slit is located between the mounting groove and the outer peripheral surface of the rotor core. The width of the slit is L. n , the width of the mounting groove is b, and the total width of n slits is ∑L n,∑L n =L1+L2+…+L n ,∑L n The relationship with b is 0.1≤∑L n / b≤0.5. Specifically, since the magnetic permeability of air is quite different from that of the main material of the rotor punching, opening some slits at appropriate positions is beneficial to improving the distribution of magnetic flux lines. The inventors have found that setting the slits between the mounting slot and the outer peripheral surface of the rotor core can not only change the original distribution of magnetic flux lines and improve the efficiency of the motor; it can also reduce the influence of the motor armature magnetic field on the main magnetic field of the rotor, improve the motor load magnetic density, optimize the air gap magnetic density waveform of the motor, reduce the harmonic content, and thus improve the radial force of the motor and reduce the vibration noise and iron loss of the motor. And the total width ∑L of the n slits is set to n The ratio of the slit size to the installation slot width b is limited to between 0.1 and 0.5. The slit size and the width of the magnet slot are reasonably set to optimize the direction of the magnetic lines of force, reduce magnetic leakage, increase the utilization rate of the magnet, and improve the efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is a schematic structural diagram of a rotor according to an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the structure of a rotor core of an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the structure of another embodiment of the rotor core of the rotor of the present invention;

[0030] Figure 4 Schematic diagram of the structure of another embodiment of the rotor core of the rotor of the present invention;

[0031] Figure 5 Schematic diagram of the structure of another embodiment of the rotor core of the rotor of the present invention;

[0032] Figure 6 The following is a performance test data diagram of the motor and compressor using the rotor of this solution;

[0033] Figure 7 The figure shows the performance test data of the motor using the rotor of this solution.

[0034] Description of Figure Numbers:

[0035] Label name Label name 100 permanent magnet 212 slit 200 rotor core 220 rivet holes 210 Structure Group 230 Flow hole 211 Mounting slot

[0036] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] The present invention provides a rotor.

[0042] Reference Figure 1 、 Figure 2 、 Figure 6 and Figure 7 In one embodiment of the present invention, the rotor includes a permanent magnet 100 and a rotor core 200. The rotor core 200 is provided with a plurality of structural groups 210. The structural group 210 includes a mounting groove 211 and n slits 212, where n is a positive integer. The permanent magnet 100 is provided in the mounting groove 211. The slit 212 is located between the mounting groove 211 and the outer peripheral surface of the rotor core 200. The width of the slit 212 is L. n , the width of the mounting groove 211 is b, and the total width of the n slits 212 is ∑L n ,∑L n =L1+L2+…+L n ,∑L n The relationship with b is 0.1≤∑L n / b≤0.5.

[0043] Specifically, further, since the magnetic permeability of air is quite different from that of the main material of the rotor sheet, opening some slits 212 at appropriate positions is beneficial to improving the distribution of magnetic flux lines. The inventors have found that setting the slits 212 between the mounting slot 211 and the outer peripheral surface of the rotor core 200 can not only change the original distribution of magnetic flux lines and improve the efficiency of the motor; it can also reduce the influence of the motor armature magnetic field on the rotor main magnetic field, improve the motor load magnetic density, optimize the motor air gap magnetic density waveform, reduce the harmonic content, and thus improve the radial force of the motor and reduce the vibration noise iron loss of the motor. And the total width ∑L of n slits 212 is set to n The ratio of the width b of the slit 212 to the width of the mounting slot 211 is limited to between 0.1 and 0.5. The size of the slit 212 and the width of the magnet slot are reasonably set to optimize the direction of the magnetic lines of force, reduce magnetic leakage, increase the utilization rate of the magnet, and improve the efficiency of the motor.

[0044] Furthermore, the rotor core 200 includes a plurality of rotor punchings, which are stacked in the axial direction of the rotor core 200 , and adjacent rotor punchings are interconnected and press-fitted, thereby forming the rotor core 200 as a whole.

[0045] Furthermore, the rotor punchings are made of soft magnetic material. Soft magnetic material can achieve a larger magnetization intensity with a smaller external magnetic field. Soft magnetic material has low coercive force and high magnetic permeability, which is beneficial to reducing the loss of the rotor core 200, that is, reducing the iron loss of the motor, and thus helping to improve the performance of the motor.

[0046] Specifically, the rotor laminations may be silicon steel sheets. Forming rotor core 200 by stacking multiple layers of silicon steel sheets can increase the magnetic flux density between the two magnetic poles of rotor core 200. During processing, an insulating layer is provided on the surface of each layer of rotor laminations to prevent eddy currents generated during operation of the rotor assembly from causing power loss. Of course, the present invention is not limited to this. In other embodiments, the rotor laminations may also be made of other materials.

[0047] Optionally, in this embodiment, the width L of the slit 212 is n The value range is: 0.4mm≤L n ≤2mm, which is conducive to reducing the difficulty of processing and can keep a certain strength inside the rotor core 200; if L n <0.4mm will greatly increase the difficulty of machining the rotor punching, making it difficult to ensure machining accuracy and meet design requirements. n >2mm will cause the size of the rotor core 200 to be too large, affecting the size of the rotor, and the width L of the slit 212 n If it is too large, there will be no space for the magnetic field to pass through.

[0048] Optionally, in this embodiment, the width b of the mounting groove 211 is in the range of 5 mm ≤ b ≤ 18 mm. Specifically, the width b of the mounting groove 211 is adapted to the width of the permanent magnet 100, that is, adapted to the thickness of the permanent magnet in the magnetization direction. Limiting the width b of the mounting groove 211 to between 5 mm and 8 mm can limit the thickness of the permanent magnet 100 in the magnetization direction, thereby ensuring the utilization rate of the permanent magnet 100, improving the cost-effectiveness of the permanent magnet 100, and preventing the permanent magnet 100 from demagnetizing during operation. It should be noted that after the outer diameter of the rotor is determined, the more permanent magnets 100 used, the better. After the amount of permanent magnets 100 reaches a certain level, continuing to increase the amount of permanent magnets 100 may cause the permanent magnets 100 to fail to be saturated magnetized after the rotor is assembled. If the rotor is assembled with magnetization, it will absorb iron chips, which cannot meet the production requirement of no iron chips and cannot meet the product requirement of no iron chips inside the compressor. If the permanent magnet 100 is not saturated, the utilization rate of the permanent magnet 100 is reduced, and there is a problem of demagnetization during operation. The thickness of the permanent magnet 100 in the magnetization direction must meet the anti-demagnetization requirements, and the contribution of the thickness direction to increasing the magnetic load is far less than that of the width. Increasing the thickness reduces the cost-effectiveness of the permanent magnet 100. If the width b of the mounting slot 211 is less than 5mm, the thickness of the permanent magnet 100 in the magnetization direction is set too small, and the permanent magnet 100's anti-demagnetization ability cannot meet the requirements. If the width b of the mounting slot 211 is greater than 8mm, the thickness of the permanent magnet 100 in the magnetization direction is set too large, the permanent magnet 100 cannot be saturated, and the cost-effectiveness of the permanent magnet 100 is reduced.

[0049] Optionally, in this embodiment, the thickness of the mounting groove 211 is h, and the value range of h is: 1.2mm≤h≤4.2mm; specifically, the thickness of the mounting groove 211 is adapted to the thickness of the permanent magnet 100. When the thickness h of the mounting groove is less than 12mm, that is, the thickness of the permanent magnet 100 is small, the magnetic flux density will be small, and the output power of the motor will be small, thereby reducing the efficiency of the motor; when the thickness h of the mounting groove 211 is greater than 4.2, that is, the thickness of the permanent magnet 100 is large, magnetic circuit saturation will occur, resulting in increased magnetic circuit loss, thereby reducing the efficiency of the motor. This solution limits the thickness of the mounting groove 211 to between 1.2mm and 4.2mm, so that the output power of the motor can meet the requirements of the compressor, while not making the thickness of the permanent magnet 100 too large, thereby reducing the magnetic circuit loss and improving the efficiency of the motor.

[0050] Optionally, in the second embodiment, the width b of the installation groove 211 is in the range of 5 mm ≤ b ≤ 18 mm; the thickness of the installation groove 211 is h, and the range of h is 1.2 mm ≤ h ≤ 4.2 mm.

[0051] Optionally, the number of poles of the rotor core 200 is 6, 8 or 10. By further limiting the number of poles of the rotor core 200, the performance of the motor with the number of slot poles that satisfies the above relationship is higher, and the anti-demagnetization ability of the motor is improved to meet the reliability of the use requirements of the compressor, thereby improving the reliability of the compressor operation.

[0052] Optionally, in this embodiment, the mounting groove 211 is arranged in a V-shape; by arranging the V-shaped mounting groove 211 on the rotor punching and optimizing the angle parameters of the V-shaped mounting groove 211, the amount of the permanent magnet 100 embedded in the rotor punching proposed by the present invention is significantly improved compared with the prior art, thereby improving the torque density of the motor, and then effectively improving the back electromotive force of the motor and the efficiency of the motor. Through this V-shaped mounting groove 211 structure, the amount of embedded permanent magnet 100 is significantly increased, thereby improving the torque density of the motor, and meeting the requirements of high efficiency and miniaturization of the motor.

[0053] Furthermore, the structure of the mounting slot 211 being symmetrical along the magnetic pole center line of the rotor core 200 can be implemented as a preferred solution of the embodiment of the present invention.

[0054] Optionally, in a second embodiment, the mounting groove 211 is configured as a straight-line mounting groove 211. It should be noted that the technical solution of the present invention can be implemented using a straight-line mounting groove 211 in addition to a V-shaped mounting groove 211, and the permanent magnet 100 is placed perpendicular to the diameter of the rotor core. Of course, since the V-shaped mounting groove 211 can increase the amount of embedded permanent magnets 100, thereby increasing the torque density of the motor and meeting the requirements of motor efficiency and miniaturization, its technical effect is superior to that of a straight-line groove, and therefore it can be implemented as a preferred solution. However, its structure is more complex than the straight-line mounting groove 211, and the process cost is higher than that of the straight-line mounting groove 211. Therefore, it can be selected according to actual needs during specific implementation.

[0055] Optionally, refer to FIG. Figures 1 to 4 , the mounting groove 211 is an axisymmetric pattern, and the n slits 212 of each structural group 210 are an axisymmetric pattern relative to the symmetry axis of the mounting groove 211; this can make the processing technology simpler, further reduce the influence of the motor armature magnetic field on the rotor main magnetic field, further reduce the influence of the motor armature magnetic field on the rotor main magnetic field, improve the motor load magnetic density, optimize the motor air gap magnetic density waveform, thereby improving the radial force of the motor and reducing the noise of the motor, and improving the cost performance of the motor. Of course, the present invention is not limited to this. In other embodiments, refer to Figure 5 The n slits 212 of each structural group 210 may also be distributed asymmetrically, and the slits 212 may not use the same size parameters. As long as the structure can organize the magnetic flux lines without destroying the mechanical strength of the punching sheet, it should be considered as the scope of protection of the claims.

[0056] Optionally, in one embodiment, referring to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 The slit 212 is arranged in a long strip shape; the length direction of the slit 212 extends along the permanent magnet 100 toward the outer wall of the rotor core 200.

[0057] Optionally, refer to Figure 3 The slit 212 may also be arranged in a fan shape.

[0058] Optionally, refer to Figures 1 to 5The lengths of the multiple slits 212 located on either side of the axis of symmetry gradually decrease in the direction away from the axis of symmetry. This ensures that the multiple slender slits 212 effectively reduce the impact of the motor's armature magnetic field on the rotor's main magnetic field, while also optimizing the air gap magnetic flux waveform, thereby ensuring a good noise reduction effect. This allows the air gap created between the slits 212 to more significantly improve the direction of the magnetic field generated by the permanent magnet 100. Of course, the present invention is not limited to this. In other embodiments, the lengths of the multiple slits 212 located on either side of the axis of symmetry may also remain constant in the direction away from the axis of symmetry.

[0059] Furthermore, the distances between the plurality of slits 212 and the outer peripheral edge of the rotor core 200 are substantially equal or completely equal.

[0060] Furthermore, the plurality of slits 212 are arranged in parallel.

[0061] Furthermore, in one embodiment, the distance between each slit 212 and the outer peripheral edge of the rotor core 200 is greater than twice the thickness of a single rotor core 200, so that the connection between the outer peripheral edge of the rotor core 200 and the slit 212 can have a certain strength to prevent the distance between the slit 212 and the outer peripheral edge from being too small, resulting in the connection being broken, thereby avoiding affecting the reliability of the rotor core 200.

[0062] Optionally, in this embodiment, a plurality of rivet holes 220 are provided on the rotor core 200 , and the rivet holes 220 are evenly arranged on the surface of the rotor core 200 along the circumferential direction of the rotor core 200 .

[0063] Optionally, in this embodiment, a plurality of flow holes 230 are provided on the rotor core 200, and the flow holes 230 are evenly arranged on the surface of the rotor core 200 along the circumferential direction of the rotor core 200; the flow holes 230 are arranged around the rotating shaft hole of the rotor core 200. The arrangement of the flow holes not only does not affect the efficiency of the motor operation, but also effectively increases the flow area of ​​the compressor. The mechanical strength requirements of the rotor can be met by increasing the number of flow holes 230, and it can also avoid the situation where the magnetic lines of force of the rotor main pole magnetic field form a closed loop through the flow holes 230, resulting in a significant increase in the magnetic resistance on the rotor side. Therefore, the rotor refrigerant flow area can be increased as much as possible while ensuring the performance and reliability of the motor, thereby promoting the circulation of the refrigerant in the compressor and achieving the purpose of cooling the rotor.

[0064] The present invention further provides a motor, comprising a stator and a rotor, wherein the rotor is rotatably disposed inside the stator.

[0065] Optionally, the stator is provided with stator slots, and the number of the stator slots is 9, 12 or 15; by reasonably setting the number of stator slots, it is beneficial to reduce the number of turns of the winding in each stator slot, thereby reducing the demagnetization reverse magnetic field intensity generated by the motor being energized, and increasing the motor's anti-demagnetization ability.

[0066] Furthermore, the stator core of the stator is also formed by stacking multiple stator punchings. By setting the stator punchings and rotor punchings to be multiple, when processing the stator core and rotor core, only multiple stator punchings or rotor punchings need to be processed, and then the multiple stator punchings and rotor punching parts are assembled into the stator core and rotor core. Compared with processing a complete stator core and rotor core, the difficulty of processing the stator punching parts and rotor punching parts is reduced, which facilitates the automated production of the stator core and rotor core through an automated production line, thereby reducing production costs.

[0067] In one embodiment, the rotor core and the stator core can be made of different materials or shapes, thereby meeting the different processing requirements of the stator and rotor. This facilitates the selection of appropriate laminations to form the rotor core and stator core according to the performance requirements of the motor, thereby ensuring good electrode performance and increasing the applicability of the motor. In another embodiment, the stator laminations stacked to form the stator core and the rotor laminations stacked to form the rotor core are identical, thereby facilitating mass production of the laminations and reducing manufacturing costs.

[0068] The present invention also proposes a compressor, which includes a motor. The specific structure of the motor refers to the above-mentioned embodiment. Since this compressor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0069] The present invention also proposes a refrigeration device, which includes a compressor. The specific structure of the compressor refers to the above-mentioned embodiment. Since this refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0070] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A rotor, characterized in that: include: permanent magnet; and The rotor core is provided with multiple structural groups, each of which includes a mounting groove and n slits, where n is a positive integer. The permanent magnet is provided in the mounting groove, and the slit is located between the mounting groove and the outer peripheral surface of the rotor core. The width of the slit is L. n , the width of the mounting groove is b, and the total width of the n slits is ∑L n , the ∑L n =L1+L2+…+L n , the ∑L n The relationship with b is 0.1≤∑L n / b≤0.

5.

2. The rotor according to claim 1, wherein: The width L of the slit n The value range is: 0.4mm≤L n ≤2mm.

3. The rotor according to claim 1, wherein: The width b of the mounting groove is in the range of 5 mm ≤ b ≤ 18 mm; and / or The thickness of the mounting groove is h, and the value range of h is: 1.2mm≤h≤4.2mm.

4. The rotor according to claim 1, wherein: The number of poles of the rotor core is 6, 8 or 10.

5. The rotor according to claim 1, wherein: The mounting groove is V-shaped; or The installation groove is arranged in an "I" shape.

6. The rotor according to claim 5, wherein: The installation groove is in an axisymmetric shape, and the n slits in each structural group are in an axisymmetric shape relative to the symmetry axis of the installation groove; or The n slits in each structural group are in an asymmetric pattern.

7. The rotor according to claim 6, wherein: The slit is arranged in a long strip shape; or The slits are arranged in a fan shape.

8. The rotor according to any one of claims 1 to 7, characterized in that The rotor core is provided with a plurality of rivet holes, and the rivet holes are evenly arranged on the surface of the rotor core along the circumferential direction of the rotor core; and / or The rotor core is provided with a plurality of flow holes, and the flow holes are evenly arranged on the surface of the rotor core along the circumferential direction of the rotor core.

9. A motor, characterized in that: The invention comprises a stator and a rotor according to any one of claims 1 to 8, wherein the rotor is rotatably arranged inside the stator.

10. The motor according to claim 9, wherein The stator is provided with stator slots, and the number of the stator slots is 9, 12 or 15.

11. A compressor, characterized in that: Comprising the motor according to claim 9 or 10.

12. A refrigeration device, characterized in that: Comprising the compressor of claim 11.

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