Stator lamination, stator core, motor, compressor and refrigeration device

Abstract

The application discloses a stator lamination, a stator core, a motor, a compressor and a refrigeration device. The stator lamination comprises a yoke, a plurality of tooth portions and a plurality of recess structures. The plurality of tooth portions are arranged on the inner circumferential surface of the yoke and are arranged at intervals along the circumference of the yoke, and a stator slot is formed between two adjacent tooth portions. The plurality of recess structures are arranged at intervals along the outer circumferential surface of the yoke. The recess structure comprises a first recess and a second recess arranged at intervals. The first recess is arranged on the yoke corresponding to two adjacent tooth portions and the yoke corresponding to the stator slot between the two tooth portions. The second recess is arranged on the yoke corresponding to a tooth portion. The technical scheme can improve the stator fixed frequency and reduce the high-frequency carrier noise of the motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a stator lamination, a stator core, a motor, a compressor and a refrigeration equipment. BACKGROUND

[0002] The existing household air conditioner compressor motor mainly adopts a variable frequency motor. The input current of the variable frequency motor is a modulated wave, and the carrier wave of the modulated wave is a high-frequency carrier wave. When the structure of the stator lamination in the motor is not properly designed, the noise and vibration of the motor and the compressor in the frequency band near the carrier wave will deteriorate, thereby affecting the performance of the motor and the compressor, and also seriously affecting the hearing experience of the user. SUMMARY

[0003] The main purpose of the present application is to provide a stator lamination, which aims to improve the stator fixed frequency and reduce the high-frequency carrier wave noise of the motor.

[0004] To achieve the above-mentioned purpose, the stator lamination provided by the present application comprises:

[0005] a yoke portion;

[0006] a plurality of tooth portions arranged on the inner circumferential surface of the yoke portion and spaced along the circumferential direction of the yoke portion, and a stator slot is formed between adjacent two tooth portions; and

[0007] a plurality of recess structures arranged at equal intervals along the outer circumferential surface of the yoke portion, wherein the recess structure comprises a first recess portion and a second recess portion arranged at intervals, the first recess portion is arranged across the yoke portion corresponding to adjacent two tooth portions and the yoke portion corresponding to the stator slot between the two tooth portions, and the second recess portion is arranged on the yoke portion corresponding to a tooth portion.

[0008] Optionally, each first recess portion and each second recess portion are arranged alternately along the circumferential direction of the yoke portion.

[0009] Optionally, along the outer circumferential direction of the yoke portion, the included angle a between the two ends of the first recess portion and the center of the yoke portion satisfies: 15°≤a≤60°.

[0010] And / or, along the outer circumferential direction of the yoke portion, the included angle β between the two ends of the second recess portion and the center of the yoke portion satisfies: 5°≤β≤20°.

[0011] Optionally, in the radial direction of the yoke portion, the relationship between the minimum distance L1min between the first recess portion and the center of the yoke portion, the outer diameter D of the yoke portion and the width b of the yoke portion satisfies: D / 2-b<L1min≤D / 2-b / 5.

[0012] And / or, in the radial direction of the yoke portion, the relationship between the minimum distance L2min between the second recess and the center of the yoke portion, the outer diameter D of the yoke portion and the width b of the yoke portion satisfies: D / 2-b

[0013] Optionally, the recessed structure is provided with k, k is greater than or equal to 3 and less than or equal to 5.

[0014] Optionally, k is equal to 4.

[0015] Optionally, the number Q of stator slots satisfies: Q≤12.

[0016] Optionally, Q is equal to 12.

[0017] The application further provides a stator core comprising a plurality of stator laminations as described above, and each of the stator laminations is arranged in an axial direction.

[0018] The application further provides an electric machine comprising a stator core as described above.

[0019] Optionally, the electric machine comprises the stator core and a rotor in cooperation, and the pole pair number p of the rotor is less than or equal to 5.

[0020] The application further provides a compressor comprising an electric machine as described above.

[0021] The application further provides a refrigeration device comprising a compressor as described above.

[0022] The technical scheme of the application sets a plurality of recessed structures on the outer circumferential surface of the yoke portion, and each of the recessed structures is arranged at equal intervals in the circumferential direction of the yoke portion, wherein the recessed structure comprises a first recess and two second recesses arranged at intervals, the first recess is arranged on the yoke portion corresponding to the two adjacent tooth portions and the stator slot between the two tooth portions, and the second recess is arranged on the yoke portion corresponding to the tooth portion, so that the number of recessed structures formed on the outer circumferential surface of the yoke portion is reasonably distributed, thereby effectively separating part of the outer circumferential surface of the yoke portion from the inner wall surface of the shell to reduce the occurrence of resonance, reduce noise, and meet the structural stability and strength of the stator lamination while ensuring the electromagnetic field circulation of the yoke portion and improving the efficiency of the electric machine with the stator lamination. In addition, the manufacturing cost can be reduced and the weight can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings shown without any creative effort.

[0024] Figure 1 Structure schematic diagram of an embodiment of the stator lamination of the present application;

[0025] Figure 2 Structure schematic diagram of an embodiment of the stator lamination of the present application; Figure 1 Structure schematic diagram of an embodiment of the stator lamination of the present application;

[0026] Figure 3 Noise comparison schematic diagram of the compressor of the present application at 60rps;

[0027] Figure 4 Noise comparison schematic diagram of the compressor of the present application at 90rps.

[0028] Explanation of reference numerals:

[0029] Reference Name Reference Name 10 Yoke portion 30 Recessed structure 20 Tooth portion 31 First recess 21 Stator slot 32 Second recess

[0030] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0035] The present application provides a stator lamination.

[0036] Referring to Figures 1 to 4 In the embodiments of the present application, the stator lamination includes a yoke portion 10, a plurality of tooth portions 20, and a plurality of recess structures 30, the plurality of tooth portions 20 are arranged on the inner circumferential surface of the yoke portion 10 and are spaced apart along the circumferential direction of the yoke portion 10, and a stator slot 21 is formed between two adjacent tooth portions 20; the plurality of recess structures 30 are arranged equidistantly along the outer circumferential surface of the yoke portion 10, the recess structure 30 includes a first recess portion 31 and a second recess portion 32 arranged equidistantly, the first recess portion 31 is arranged across the yoke portion 10 corresponding to two adjacent tooth portions 20 and the yoke portion 10 corresponding to the stator slot 21 between the two tooth portions 20, and the second recess portion 32 is arranged on the yoke portion 10 corresponding to a tooth portion 20. In this way, the parameters of the stator lamination can be reasonably optimized to meet the best performance requirements, and the stator fixed frequency is improved, thereby reducing the high-frequency carrier noise of the motor with the stator lamination.

[0037] The compressor includes a motor, the motor includes a stator core, the stator core includes a plurality of stator laminations arranged in a stack, and the stator lamination can be a silicon steel sheet, the stator lamination includes a yoke portion 10 and a plurality of tooth portions 20, the yoke portion 10 is a ring structure, wherein the inner circumferential surface of the yoke portion 10 is provided with a plurality of tooth portions 20, each tooth portion 20 is uniformly and equidistantly arranged along the circumferential direction of the yoke portion 10, and extends radially inward along the yoke portion 10, and each adjacent tooth portion 20 defines a stator slot 21 for placing a winding coil, thereby driving the rotor to rotate.

[0038] A plurality of recess structures 30 are arranged on the outer circumferential surface of the yoke portion 10, each of the recess structures 30 is arranged on the outer circumferential surface of the yoke portion 10, and each of the recess structures 30 is arranged at equal intervals along the circumferential direction of the yoke portion 10, so as to ensure the structural stability of the stator lamination and facilitate the driving of the rotor, and the opening of the recess structure 30 is arranged to face away from the tooth portion 20, so as to increase the gap between the yoke portion 10 and the motor housing, wherein the recess structure 30 comprises a first recess 31 and two second recesses 32 arranged at intervals, the first recess 31 is arranged on the yoke portion 10 corresponding to the two adjacent tooth portions 20 and the stator slot 21 located between the two tooth portions 20, and the second recess 32 is arranged on the yoke portion 10 corresponding to the tooth portion 20. In other words, the recess structure 30 is arranged on the yoke portion 10 connected with three adjacent tooth portions 20, which is beneficial to reasonably distribute the number of recess structures 30 formed on the outer circumferential surface of the yoke portion 10, and effectively separate part of the outer circumferential surface of the yoke portion 10 and the inner wall surface of the housing to reduce resonance and noise. At the same time, the structural stability and strength of the stator lamination are met, the electromagnetic field circulation of the yoke portion 10 is ensured, and the performance efficiency of the motor with the stator lamination is improved. In other embodiments, the first recess 31 can be arranged on the yoke portion 10 connected with a plurality of tooth portions 20, and the plurality can refer to two or more, which is specifically arranged according to the outer diameter size of the yoke portion 10. In addition, the manufacturing cost and weight can be reduced.

[0039] The technical scheme of the present application arranges a plurality of recess structures 30 on the outer circumferential surface of the yoke portion 10, each of the recess structures 30 is arranged at equal intervals along the circumferential direction of the yoke portion 10, wherein the recess structure 30 comprises a first recess 31 and two second recesses 32 arranged at intervals, the first recess 31 is arranged on the yoke portion 10 corresponding to the two adjacent tooth portions 20 and the stator slot 21 located between the two tooth portions 20, and the second recess 32 is arranged on the yoke portion 10 corresponding to the tooth portion 20. In this way, it is beneficial to reasonably distribute the number of recess structures 30 formed on the outer circumferential surface of the yoke portion 10, and effectively separate part of the outer circumferential surface of the yoke portion 10 and the inner wall surface of the housing to reduce resonance and noise. At the same time, the structural stability and strength of the stator lamination are met, the electromagnetic field circulation of the yoke portion 10 is ensured, and the efficiency of the motor with the stator lamination is improved. In addition, the manufacturing cost and weight can be reduced.

[0040] Referring to Figure 1 In an embodiment, each of the first recess 31 and the second recess 32 is arranged alternately and uniformly along the circumferential direction of the yoke portion 10, so as to effectively improve the structural stability of the stator lamination, optimize the magnetic circuit structure from the tooth portion 20 to the yoke portion 10, ensure the electromagnetic field circulation of the yoke portion 10, and improve the performance efficiency of the motor. In other embodiments, two second recesses 32 are arranged between two first recesses 31.

[0041] Referring toFigure 2 In an embodiment, along the circumferential direction of the yoke 10, the included angle a of the two ends of the first recess 31 to the center of the yoke 10 satisfies: 15°≤a≤60°; and / or, along the circumferential direction of the yoke 10, the included angle β of the two ends of the second recess 32 to the center of the yoke 10 satisfies: 5°≤β≤20°. By reasonably optimizing the opening width of the first recess 31 and the second recess 32 on the outer circumferential surface of the yoke 10, the outer circumferential surface of most of the yoke 10 can be reliably separated from the inner wall of the motor housing. Specifically, when the value of the included angle a is less than 15° and the value of the included angle β is less than 5°, due to the small opening width of the first recess 31 and the second recess 32, it is easy to cause the risk of being unable to effectively reduce the stress deformation and distortion of the stator sheet, and it is difficult to effectively reduce the vibration transmitted to the housing, to stagger the natural frequency of the housing and the working frequency during the operation of the motor, and thus to avoid the occurrence of resonance and the generation of noise; and when the value of the included angle a is greater than 60° and the value of the included angle β is greater than 20°, due to the large opening width of the first recess 31 and the second recess 32, it is easy to affect the connection stability of the stator sheet, and it is also easy to affect the magnetic flux from the tooth portion 20 to the yoke 10, thereby reducing the performance efficiency of the motor.

[0042] Therefore, by setting the specific value of the included angle a between 15° and 60° and the specific value of the included angle β between 5° and 20°, and by reasonably setting the opening width of the first recess 31 and the second recess 32, the stator sheet can be reliably fixed while the outer circumferential surface of most of the yoke 10 is reliably separated from the inner wall of the motor housing, thereby effectively reducing the electromagnetic field distortion caused by the deformation and distortion of the stator sheet, effectively reducing the vibration transmitted to the housing, so that the natural frequency of the housing and the working frequency during the operation of the motor are staggered, thereby effectively avoiding the occurrence of resonance and reducing noise. At the same time, the magnetic circuit structure from the tooth portion 20 to the yoke 10 is optimized, thereby reducing the magnetic force acting on the housing, effectively reducing the reaction force on the stator core composed of the stator sheet stack, improving the stability of the stator core during rotation, reducing the iron loss during the operation of the motor, and improving the performance efficiency of the motor.

[0043] Specifically, the specific value of the included angle a can be 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc.; and the specific value of the included angle β can be 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, etc.

[0044] Reference Figure 2In an embodiment, in the radial direction of the yoke portion 10, the relationship between the minimum distance L1min between the first recess 31 and the center of the yoke portion 10, the outer diameter D of the yoke portion 10, and the width b of the yoke portion 10 satisfies: D / 2-b

[0045] Specifically, since the first recess 31 is arranged on the yoke portion 10 connected with two tooth portions 20, and the second recess 32 is arranged on the yoke portion 10 corresponding to the tooth portion 20, when L1min is less than D / 2-b and L2min is less than D / 2-b, the adjacent two tooth portions 20 cannot be reliably connected through the yoke portion 10, the yoke portion 10 of the stator lamination sheet has a broken portion, and the yoke portion 10 corresponding to the tooth portion 20 is prone to deformation, distortion, fracture, and other risks under stress, thereby causing structural failure of the stator lamination sheet, which easily affects the structure of the stator lamination sheet and the magnetic circuit structure from the tooth portion 20 to the yoke portion 10. When L1min is greater than D / 2-b / 5 and L2min is greater than D / 2-b / 5, the gap between the outer periphery of the yoke portion 10 and the inner wall of the motor housing is too small, which causes the yoke portion 10 and the motor housing to be unable to be separated well, thereby failing to effectively reduce the vibration transmitted to the housing to avoid resonance, which easily generates a large noise to a great extent, reduces the use comfort and experience, shortens the service life of the motor, and reduces the performance efficiency of the motor.

[0046] Therefore, the specific values of L1min and L2min are set between D / 2-b and D / 2-b / 5, the depth of the first recess 31 and the second recess 32 in the radial direction is reasonably set, the gap between the outer periphery of part of the yoke portion 10 and the inner wall of the motor housing is increased, the weight of the stator lamination sheet is reduced, and the magnetic circuit structure from the tooth portion 20 to the yoke portion 10 is optimized, thereby reducing the noise and improving the operation stability and performance efficiency of the motor with the stator lamination sheet.

[0047] In addition, the reasonable setting of the gap between the stator lamination sheet and the motor housing can also increase the flow channel for the refrigerant, reliably flow the refrigerant, and prolong the service life of the motor.

[0048] Optionally, in an embodiment, the recess structures 30 are provided with k, k is greater than or equal to 3 and less than or equal to 5; specifically, when the number of recess structures 30 is less than 3, most of the outer circumferential surface of the yoke 10 is connected with the motor shell, the vibration transmitted to the shell is large, the natural frequency of the shell cannot be staggered with the working frequency when the motor is working, the gap between the yoke 10 and the shell is small, and thus resonance is prone to occur, the heat dissipation effect is poor, the noise is increased, the service life of the motor is shortened, the performance efficiency of the motor is reduced, and the user experience is reduced; when the number of recess structures 30 is greater than 5, the structural stability of the stator lamination is easily affected, and thus the stability of the motor during operation is affected, the performance efficiency of the motor is reduced, the noise is increased, and the user experience is reduced. Therefore, the number of recess structures 30 is set to be between 3 and 5, so that most of the outer circumferential surface of the yoke 10 can be reliably separated from the inner wall of the motor shell, thereby reducing the vibration transmitted to the shell, effectively avoiding resonance, reducing noise, and optimizing the magnetic circuit structure from the tooth portion 20 to the yoke 10, improving the stability of the stator core during rotation, reducing the iron loss of the motor during operation, and improving the performance efficiency of the motor. The specific value of the number of recess structures 30 can be 3, 4 or 5. Figure 1 The number of recess structures 30 on the stator lamination is 4.

[0049] Specifically, in an embodiment, k is equal to 4, that is, the recess structures 30 on the stator lamination are provided with 4, and the 4 recess structures 30 are arranged along the outer circumferential surface of the yoke 10, so that most of the outer circumferential surface of the yoke 10 can be reliably separated from the inner wall of the motor shell, thereby facilitating improvement of the performance efficiency of the motor.

[0050] Optionally, in an embodiment, the number Q of the stator slots 21 satisfies Q≤12; wherein the number of stator slots 21 can be selected according to actual needs. Specifically, Q is equal to 12.

[0051] The present application also provides a stator core, which comprises a plurality of stator laminations. The specific structure of the stator core is referred to the above embodiments. Since the stator core adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, each stator lamination is arranged in an axial direction to reduce the iron loss of the motor during operation.

[0052] The present application also provides a motor, which comprises a stator core. The specific structure of the stator core is referred to the above embodiments. Since the motor adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0053] Specifically, the motor comprises a stator core and a rotor in cooperation, wherein the pole pair number p of the rotor is less than or equal to 5, i.e. the pole number can be 4, 6, 8, etc. When the stator slot number Q is 12, the motor can be a 12-slot 8-pole motor.

[0054] The application further provides a compressor comprising the motor, the specific structure of which is referred to the above embodiments. Since the compressor adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Figure 3 According to the limitation of the related parameters of the stator lamination in the motor, the noise of the compressor of the application at 60 rps is compared with that of the comparative model as shown in the table Figure 4 The performance of the compressor of the application is obviously better than that of the comparative model.

[0055] The application further provides a refrigeration equipment comprising the compressor, the specific structure of which is referred to the above embodiments. Since the refrigeration equipment adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0056] The above is only the optional embodiments of the application, and does not limit the patent scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields under the inventive concept of the application, and the content of the specification and drawings are included in the patent protection scope of the application.

Claims

1. A stator lamination characterized by, Comprise: a yoke portion; a plurality of tooth portions provided on an inner circumferential surface of the yoke portion and arranged at intervals in a circumferential direction of the yoke portion, a stator slot being formed between adjacent two of the tooth portions; and a plurality of recessed structures arranged at intervals in an outer circumferential surface of the yoke portion, the recessed structures comprising first recessed portions and second recessed portions arranged at intervals, the first recessed portions being provided across the yoke portion corresponding to adjacent two of the tooth portions and the yoke portion corresponding to the stator slot between the two tooth portions, and the second recessed portions being provided on the yoke portion corresponding to one of the tooth portions; in a radial direction of the yoke portion, a relationship between a minimum distance L1min between the first recessed portion and a center of the yoke portion, an outer diameter D of the yoke portion, and a width b of the yoke portion satisfies: D / 2-b and / or, in the radial direction of the yoke portion, a relationship between a minimum distance L2min between the second recessed portion and the center of the yoke portion, the outer diameter D of the yoke portion, and the width b of the yoke portion satisfies: D / 2-b 2. The stator lamination of claim 1 wherein, Each of the first recessed portions and each of the second recessed portions are arranged alternately in the circumferential direction of the yoke portion.

3. The stator lamination of claim 1 wherein, In an outer circumferential direction of the yoke portion, an included angle α of both ends of the first recessed portion to the center of the yoke portion satisfies: 15°≤α≤60°; and / or, in the outer circumferential direction of the yoke portion, an included angle β of both ends of the second recessed portion to the center of the yoke portion satisfies: 5°≤β≤20°.

4. The stator lamination of claim 1 wherein, The recessed structures are provided with k, k being greater than or equal to 3 and less than or equal to 5.

5. The stator lamination of claim 4 wherein, k is equal to 4.

6. The stator lamination of claim 1 wherein, A number Q of the stator slots satisfies: Q≤12.

7. The stator lamination of claim 6 wherein, Q is equal to 12.

8. A stator core characterized by, Comprise a plurality of the stator lamination as claimed in any one of claims 1 to 7, each of the stator laminations being arranged in an axial direction.

9. An electric machine characterized by Comprise the stator core as claimed in claim 8.

10. The electric machine of claim 9, wherein, The motor comprises the stator core and a rotor in cooperation, a pole pair number p of the rotor being less than or equal to 5.

11. A compressor characterized by, Comprise the motor as claimed in any one of claims 9 to 10.

12. A refrigeration appliance characterized by, Comprise the compressor as claimed in claim 11.

Images