Stator structure, motor and refrigeration equipment

Abstract

The utility model discloses a stator structure, a motor and refrigeration equipment. The stator structure comprises a stator iron core and an insulation framework. A plurality of stator grooves which are arranged at intervals in the circumferential direction of the stator core are formed in the stator core, an injection molding runner is arranged on the inner wall, facing the stator grooves, of the stator core, and the insulating framework is integrally injection-molded on the stator core. According to the stator structure provided by the embodiment of the utility model, the stator structure comprises the stator iron core, the plurality of stator grooves are arranged at intervals in the circumferential direction of the stator iron core, and the injection molding runners are arranged on the inner wall, facing the stator grooves, of the stator iron core and can be used for increasing the area of the whole runner formed in the stator grooves; the mobility of the injection molding material in the process of injection molding of the insulation framework can be improved, the difficulty of the injection molding process is reduced, the injection molding quality can be ensured and the thickness of the insulation framework can be reduced due to the improvement of the mobility of the injection molding material, so that the occupation of the insulation framework on the space in a stator slot can be reduced and the slot fullness rate is improved; as the fluidity of the injection molding material is improved, the injection molding rejection rate can be reduced, the product percent of pass is improved, and the overall performance of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the field of motors, and in particular to a stator structure, a motor and a refrigeration device. Background Art

[0002] The stator structure is an important component in a motor. The stator structure generally includes a stator core, windings and an insulating skeleton. The main function of the insulating skeleton is to be assembled on the stator core to provide necessary electrical isolation between the stator core and the windings. In related technologies, common insulating skeletons mainly include split plug-in type and integral injection molding type. However, the insulating skeleton formed by the traditional integral injection molding type has problems such as a large thickness and a high injection molding rejection rate. These problems not only increase the production cost, but also may affect the overall performance of the motor. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a stator structure. The stator structure includes a stator core, and a plurality of stator slots are arranged at intervals in the circumferential direction of the stator core. An injection molding runner is provided on the inner wall of the stator core facing the stator slots. The injection molding runner can be used to increase the area of the overall runner formed in the stator slots, improve the fluidity of the injection molding material during the injection molding of the insulating skeleton, reduce the injection molding process difficulty. Since the fluidity of the injection molding material is improved, the thickness of the insulating skeleton can be reduced while ensuring the injection molding quality, thereby reducing the occupation of the space in the stator slots by the insulating skeleton and increasing the slot fill factor. Since the fluidity of the injection molding material is improved, the injection molding rejection rate can also be reduced, the product qualification rate can be improved, and the overall performance of the motor can be improved.

[0004] The utility model also provides a motor having the above stator structure.

[0005] The utility model also provides a refrigeration device having the above motor.

[0006] The stator structure according to the first aspect embodiment of the utility model includes: a stator core, in which a plurality of stator slots are arranged at intervals in the circumferential direction of the stator core, and an injection molding runner is provided on the inner wall of the stator core facing the stator slots; an insulating skeleton, integrally injection molded on the stator core.

[0007] According to the stator structure of the embodiments of the present utility model, the stator structure includes a stator core. A plurality of stator slots are arranged at intervals in the circumferential direction of the stator core. By providing an injection molding runner on the inner wall of the stator core facing the stator slots, this injection molding runner can be used to increase the area of the overall runner formed in the stator slots, improve the fluidity of the injection molding material during the injection molding of the insulating skeleton, reduce the difficulty of the injection molding process. Since the fluidity of the injection molding material is improved, the thickness of the insulating skeleton can be reduced while ensuring the injection molding quality, thereby reducing the occupation of the space in the stator slots by the insulating skeleton and increasing the slot fill factor; since the fluidity of the injection molding material is improved, the injection molding scrap rate can also be reduced, the product qualification rate can be improved, and the overall performance of the motor can be improved.

[0008] According to some embodiments of the present utility model, the injection molding runner extends along the axial direction of the stator core.

[0009] According to some embodiments of the present utility model, the injection molding runner axially penetrates both axial sides of the stator core along the axial direction of the stator core.

[0010] According to some embodiments of the present utility model, the injection molding runner is a groove formed on the stator core.

[0011] According to some embodiments of the present utility model, the cross-section of the injection molding runner is arc-shaped.

[0012] According to some embodiments of the present utility model, the radius of the arc of the injection molding runner ranges from 0.2 mm to 3 mm.

[0013] According to some embodiments of the present utility model, the stator core includes a stator yoke, a plurality of stator teeth, and pole shoes. The plurality of stator teeth are arranged on the inner circumferential side of the stator yoke at intervals in the circumferential direction of the stator yoke, and the pole shoes are connected to the ends of the stator teeth away from the stator yoke. Adjacent two of the stator teeth, the pole shoes, and the stator yoke jointly define the stator slots;

[0014] Wherein, the inner side wall of the stator tooth facing the stator slot is the first inner side wall, the inner side wall of the stator yoke facing the stator slot is the second inner side wall, the inner side wall of the pole shoe facing the stator slot is the third inner side wall, and the injection molding runner is provided on at least one of the first inner side wall, the second inner side wall, and the third inner side wall.

[0015] According to some embodiments of the present utility model, the injection molding runner extends along the axial direction of the stator core, and a plurality of the injection molding runners are arranged at intervals in the radial direction of the stator teeth on the first inner side wall.

[0016] According to some embodiments of the present utility model, the injection molding runner extends along the axial direction of the stator core, the injection molding runner is provided on the first inner side wall, each stator tooth has two first inner side walls oppositely arranged along the circumferential direction of the stator core, and the central axes of the injection molding runners on the two first inner side walls of the stator tooth are staggeredly arranged.

[0017] According to some embodiments of the present utility model, the injection molding runner is provided on both the first inner side wall and the second inner side wall, and the cross-sectional area of the injection molding runner on the second inner side wall is larger than that of the injection molding runner on the first inner side wall.

[0018] According to some embodiments of the present utility model, the injection molding runner is provided on both the first inner side wall and the third inner side wall, and the cross-sectional area of the injection molding runner on the third inner side wall is smaller than that of the injection molding runner on the first inner side wall.

[0019] According to some embodiments of the present utility model, at least one through hole is provided on the axial end surface of the stator tooth, the through hole axially penetrates the stator tooth, the insulating skeleton includes a skeleton body and connecting ribs, the skeleton body covers the outer surface of the stator core, the number of the connecting ribs is the same as that of the through holes and they correspond to each other one by one, and the connecting ribs are received in the corresponding through holes.

[0020] According to some embodiments of the present utility model, the stator core is an annular structure formed by bending a strip-shaped stator core blank, an avoidance notch is formed on the inner peripheral wall of the stator yoke, the avoidance notch axially penetrates the stator yoke along the axial direction of the stator core, and the avoidance notch is used to absorb and avoid the bending deformation of the stator core blank.

[0021] According to some embodiments of the present utility model, when the stator core is unfolded, the avoidance notch is in a "V" shape.

[0022] According to some embodiments of the present utility model, the insulating skeleton includes a skeleton body and reinforcing ribs, the skeleton body covers the outer surface of the stator core, the number of the reinforcing ribs is the same as that of the injection molding runners and they correspond to each other one by one, and the reinforcing ribs are received in the corresponding injection molding runners.

[0023] According to some embodiments of the present utility model, the wall thickness of the skeleton body is less than 0.7 mm.

[0024] According to the motor of the second aspect embodiment of the present utility model, it includes: the stator structure according to the first aspect embodiment of the present utility model.

[0025] The motor according to the embodiment of the present utility model includes a stator structure according to the embodiment of the first aspect of the present utility model. An injection molding runner is provided on the inner wall of the stator core facing the stator slot in the stator structure, which can improve the fluidity of the injection molding material during the injection molding of the insulating skeleton, reduce the process difficulty, reduce the thickness of the insulating skeleton while ensuring the injection molding quality to increase the slot filling rate; and can reduce the injection molding rejection rate and improve the product qualification rate.

[0026] The refrigeration device according to the embodiment of the third aspect of the present utility model includes: a motor according to the embodiment of the second aspect of the present utility model.

[0027] The refrigeration device according to the embodiment of the present utility model includes a motor according to the embodiment of the second aspect of the present utility model. The motor includes a stator structure according to the embodiment of the first aspect of the present utility model. An injection molding runner is provided on the inner wall of the stator core of the stator structure facing the stator slot, which can improve the fluidity of the injection molding material during the injection molding of the insulating skeleton, reduce the process difficulty, reduce the thickness of the insulating skeleton while ensuring the injection molding quality to increase the slot filling rate; and can reduce the injection molding rejection rate and improve the product qualification rate.

[0028] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0030] Figure 1 is an exploded view of a stator structure according to some embodiments of the present utility model;

[0031] Figure 2 is Figure 1 a partial structural sectional view of the stator structure in ;

[0032] Figure 3 is Figure 1 an exploded view of the insulating skeleton in ;

[0033] Figure 4 is Figure 3 an enlarged view of part A in ;

[0034] Figure 5 is Figure 1 a view of the insulating skeleton from another angle in ;

[0035] Figure 6 is Figure 5 an enlarged view of part B in ;

[0036] Figure 7 isFigure 1 Expanded schematic view of the middle stator core;

[0037] Figure 8 is Figure 7 Enlarged view at position C in the middle.

[0038] Reference numerals:

[0039] 100, stator structure;

[0040] 10, stator core; 11, stator slot; 12, stator yoke; 13, stator tooth; 14, pole shoe; 15, first inner wall; 16, second inner wall; 17, third inner wall; 18, injection molding runner; 19, through hole; 20, avoidance notch;

[0041] 30, insulating skeleton; 31, skeleton main body; 32, reinforcing rib. Specific embodiments

[0042] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0043] Below, refer to Figures 1 - 8 to describe the stator structure 100 according to the embodiments of the present invention.

[0044] The stator structure 100 according to the first aspect embodiment of the present invention includes: a stator core 10 and an insulating skeleton 30.

[0045] Referring to Figure 1 and Figure 2 , the stator core 10 is formed with a plurality of stator slots 11 arranged at intervals along the circumferential direction of the stator core 10, and an injection molding runner 18 is provided on the inner wall of the stator core 10 facing the stator slots 11. By providing the injection molding runner 18 on the inner wall of the stator core 10 facing the stator slots 11, the fluidity of the injection molding material can be increased during the injection molding of the insulating skeleton 30, so that the insulating skeleton 30 is more complete and uniform, improving the qualified rate of the product; and, the injection molding runner 18 can increase the cross-sectional area when the injection molding material flows, so that the fluidity of the injection molding material increases, and the difficulty of the injection molding process can be reduced; and, the connection between the insulating skeleton 30 and the stator core 10 can be made more firm.

[0046] For example, the stator core 10 includes a stator yoke 12, a plurality of stator teeth 13 and a plurality of pole shoes 14. The plurality of stator teeth 13 are arranged on the inner circumferential side of the stator yoke 12 and are spaced apart along the circumferential direction of the stator yoke 12. The pole shoes 14 are connected to one end of the stator teeth 13 away from the stator yoke 12. Two adjacent stator teeth 13, pole shoes 14 and the stator yoke 12 together define a stator slot 11.

[0047] Optionally, the thickness of the insulating skeleton 30 can be appropriately reduced. Since the stator core 10 is provided with an injection molding runner 18 on the inner wall facing the stator slot 11, the fluidity of the injection molding material is stronger when injecting the insulating skeleton 30. Therefore, while ensuring the injection molding quality of the injection molding material, the thickness of the insulating skeleton 30 can be appropriately reduced. By reducing the thickness of the insulating skeleton 30, the slot fill factor can be improved and the performance of the motor can be enhanced.

[0048] For example, the stator structure 100 includes a winding. The winding passes through the stator slot 11 and winds around the stator core 10 to generate a magnetic field.

[0049] The insulating skeleton 30 is integrally injection molded on the stator core 10. By integrally injection molding the insulating skeleton 30 on the stator core 10, the connection between the insulating skeleton 30 and the stator core 10 can be made more firm, avoiding insulation failure caused by the insulating skeleton 30 falling off or slipping out relative to the stator core 10.

[0050] For example, the stator structure 100 is applied to an inner rotor motor, and the insulating skeleton 30 does not wrap the inner circumferential wall of the pole shoe 14. Since the stator structure 100 is an outer stator structure 100 and the pole shoe 14 of the stator cooperates with the inner rotor, the inner circumferential wall of the pole shoe 14 requires a high fitting accuracy. By not wrapping the inner circumferential wall of the pole shoe 14 with the insulating skeleton 30, the fitting accuracy of the inner circumferential wall of the pole shoe 14 can be improved.

[0051] For example, the manufacturing method of the stator structure 100 is as follows:

[0052] Step 1: Manufacture a blank of the stator core 10. The blank of the stator core 10 is an unfolded long strip structure, and connection structures such as welding points are reserved at both ends of the blank of the stator core 10. Among them, an injection molding runner 18 is provided on the inner wall of the blank of the stator core 10 facing the stator slot 11.

[0053] Step 2: Inject a layer of insulating skeleton 30 outside the blank of the stator core 10, and connection structures such as welding points are reserved at both ends of the stator core 10.

[0054] Step 3: Bend the overall structure of the blank of the stator core 10 and the insulating skeleton 30, and the overall shape is annular after bending.

[0055] Step 4: Connect the two ends of the blank of the stator core 10. For example, the two ends of the blank of the stator core 10 can be welded together to form the stator structure 100.

[0056] According to the stator structure 100 of the embodiments of the present utility model, the stator structure 100 includes a stator core 10, and a plurality of stator slots 11 are arranged at circumferential intervals of the stator core 10. By providing an injection molding runner 18 on the inner wall of the stator core 10 facing the stator slots 11, the injection molding runner 18 can be used to increase the area of the overall runner formed in the stator slots 11, improve the fluidity of the injection molding material during the injection molding of the insulating skeleton 30, reduce the difficulty of the injection molding process. Since the fluidity of the injection molding material is improved, the thickness of the insulating skeleton 30 can be reduced while ensuring the injection molding quality, thereby reducing the occupancy of the space in the stator slots 11 by the insulating skeleton 30 and increasing the slot filling factor; since the fluidity of the injection molding material is improved, the injection molding rejection rate can also be reduced, the product qualification rate can be improved, and the overall performance of the motor can be improved.

[0057] According to some embodiments of the present utility model, referring to Figure 2 , the injection molding runner 18 extends along the axial direction of the stator core 10. Since the injection molding material flows along the axial direction of the stator core 10 during the injection molding process, by making the injection molding runner 18 extend along the axial direction of the stator core 10, the injection molding material can flow naturally along the injection molding runner 18 during injection molding, and the guiding effect of the injection molding runner 18 is better; moreover, the injection molding runner 18 can increase the cross-sectional area of the flow of the injection molding material, making the fluidity of the injection molding material better.

[0058] According to some embodiments of the present utility model, referring to Figure 2 , the injection molding runner 18 axially penetrates both axial sides of the stator core 10 along the axial direction of the stator core 10. By making the injection molding runner 18 axially penetrate both axial sides of the stator core 10 along the axial direction of the stator core 10, during injection molding, the cross-sectional area of the flow of the injection molding material can be increased along the axial direction of the stator core 10, making the improvement of the fluidity of the injection molding material by the injection molding runner 18 more sufficient.

[0059] According to some embodiments of the present utility model, referring to Figure 2 , the injection molding runner 18 is a groove formed on the stator core 10. By making the injection molding runner 18 a groove formed on the stator core 10, the process of manufacturing the injection molding runner 18 can be simple.

[0060] According to some embodiments of the present utility model, referring to Figure 2 , the cross-section of the injection molding runner 18 is arc-shaped. By setting the cross-section of the injection molding runner 18 to be arc-shaped, it can be avoided that there are turning dead corners in the injection molding runner 18 resulting in blockage of the injection molding material and difficulty in passing through, making the fluidity of the injection molding material in the injection molding runner 18 better and the guiding performance of the injection molding runner 18 better.

[0061] According to some embodiments of the present utility model, referring to Figure 2, the arc radius of the injection molding runner 18 is R, and the value range of R is 0.2 mm to 3 mm. For example, the value of R can be 0.2 mm, 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, etc. By making the arc radius R of the injection molding runner 18 not less than 0.2 mm, the injection molding runner 18 can be made large enough so that the injection molding material can flow smoothly in the injection molding runner 18, endowing the injection molding runner 18 with sufficient flow guiding performance; by making the arc radius R of the injection molding runner 18 not greater than 3 mm, it can be avoided that the groove on the stator core 10 is too large due to the over-large injection molding runner 18, resulting in a relatively small cross-sectional area of the stator core 10 and making it difficult to conduct magnetic flux, thus affecting the performance of the stator structure 100, and the influence of the injection molding runner 18 on the magnetic flux conduction of the stator core 10 can be reduced.

[0062] According to some embodiments of the present invention, referring to Figure 8 , the stator core 10 includes a stator yoke 12, a plurality of stator teeth 13 and pole shoes 14. The plurality of stator teeth 13 are arranged on the inner circumferential side of the stator yoke 12 at intervals in the circumferential direction of the stator yoke 12. The pole shoes 14 are connected to one end of the stator teeth 13 away from the stator yoke 12. Adjacent two stator teeth 13, pole shoes 14 and the stator yoke 12 together define a stator slot 11. By arranging the plurality of stator teeth 13 on the inner circumferential side of the stator yoke 12 at intervals in the circumferential direction of the stator yoke 12, and adjacent two stator teeth 13, pole shoes 14 and the stator yoke 12 together define the stator slot 11, the winding can be wound around the stator teeth 13 and accommodated in the stator slot 11.

[0063] For example, there are intervals between the plurality of pole shoes 14 to avoid interference between the pole shoes 14 when the stator core 10 is bent, which makes it difficult to bend the stator core 10.

[0064] Among them, the inner side wall of the stator tooth 13 facing the stator slot 11 is the first inner side wall 15, the inner side wall of the stator yoke 12 facing the stator slot 11 is the second inner side wall 16, and the inner side wall of the pole shoe 14 facing the stator slot 11 is the third inner side wall 17. The injection molding runner 18 is provided on at least one of the first inner side wall 15, the second inner side wall 16 and the third inner side wall 17. By providing the injection molding runner 18 on at least one of the first inner side wall 15, the second inner side wall 16 and the third inner side wall 17, it can be ensured that the injection molding material can be guided by the injection molding runner 18 when flowing through the stator core 10, increasing the fluidity of the injection molding material, so that the structure of the insulating skeleton 30 is more complete and uniform, and the product qualification rate of the stator structure 100 is improved.

[0065] For example, the injection molding runner 18 can be provided on the first inner side wall 15. For another example, the injection molding runner 18 can be provided on the second inner side wall 16. For another example, the injection molding runner 18 can be provided on all of the first inner side wall 15, the second inner side wall 16 and the third inner side wall 17.

[0066] According to some embodiments of the present invention, referring to Figure 8 , the injection molding runner 18 extends along the axial direction of the stator core 10. A plurality of injection molding runners 18 are arranged at intervals in the radial direction of the stator teeth 13 on the first inner sidewall 15. Since the injection molding material flows along the axial direction of the stator core 10 during the injection molding process, by making the injection molding runner 18 extend along the axial direction of the stator core 10, the injection molding material can flow naturally along the injection molding runner 18 during injection molding, and the flow guiding effect of the injection molding runner 18 is better; moreover, the injection molding runner 18 can increase the cross-sectional area of the flow of the injection molding material, making the injection molding material more fluid. By arranging a plurality of injection molding runners 18 at intervals in the radial direction of the stator teeth 13 on the first inner sidewall 15, the injection molding material can be guided by multiple injection molding runners 18 in the radial direction of the stator teeth 13, the fluidity of the injection molding material is stronger, and the structure of the insulating skeleton 30 is more complete and uniform.

[0067] According to some embodiments of the present invention, referring to Figure 8 , the injection molding runner 18 extends along the axial direction of the stator core 10, the injection molding runner 18 is provided on the first inner sidewall 15, each stator tooth 13 has two first inner sidewalls 15 arranged opposite to each other in the circumferential direction of the stator core 10, and the central axes of the injection molding runners 18 on the two first inner sidewalls 15 of the stator tooth 13 are arranged staggeredly. Since the injection molding material flows along the axial direction of the stator core 10 during the injection molding process, by making the injection molding runner 18 extend along the axial direction of the stator core 10, the injection molding material can flow naturally along the injection molding runner 18 during injection molding, and the flow guiding effect of the injection molding runner 18 is better; moreover, the injection molding runner 18 can increase the cross-sectional area of the flow of the injection molding material, making the injection molding material more fluid. If the central axes of the injection molding runners 18 on the two first inner sidewalls 15 of the stator tooth 13 are symmetrically arranged, the cross-sectional area of the stator tooth 13 at the middle part between the two symmetric injection molding runners 18 is smaller, and the magnetic flux passing through the stator core 10 at this place is smaller, affecting the performance of the stator structure 100. By making the central axes of the injection molding runners 18 on the two first inner sidewalls 15 of the stator tooth 13 arranged staggeredly, the influence of the injection molding runner 18 on the magnetic flux passing through the stator core 10 can be reduced, and the influence on the performance of the stator structure 100 can be reduced. Moreover, it is possible to avoid the reduction of the local structural strength caused by the relative arrangement of the injection molding runners 18 on the two first inner sidewalls 15 of the stator tooth 13, thereby ensuring the structural strength of the stator tooth 13.

[0068] According to some embodiments of the present invention, referring to Figure 8, injection channels 18 are provided on both the first inner wall 15 and the second inner wall 16, and the cross-sectional area of the injection channel 18 on the second inner wall 16 is larger than that of the injection channel 18 on the first inner wall 15. Since coils need to be wound around the stator teeth 13, the magnitude of the magnetic flux passing through the stator teeth 13 has a great influence on the performance of the stator structure 100, that is, the cross-sectional area of the stator teeth 13 has a great influence on the performance of the stator structure 100. By making the cross-sectional area of the injection channel 18 on the second inner wall 16 larger than that of the injection channel 18 on the first inner wall 15, while increasing the size of the injection channel 18 to increase the fluidity of the injection material, the influence of the injection channel 18 on the magnetic flux passing through the stator core 10 can be reduced, and the influence on the performance of the stator structure 100 can be reduced.

[0069] According to some embodiments of the present invention, referring to Figure 8 , injection channels 18 are provided on both the first inner wall 15 and the third inner wall 17, and the cross-sectional area of the injection channel 18 on the third inner wall 17 is smaller than that of the injection channel 18 on the first inner wall 15. Since the cross-sectional area of the pole shoe 14 is small, by making the cross-sectional area of the injection channel 18 on the third inner wall 17 of the pole shoe 14 smaller than that of the injection channel 18 on the first inner wall 15, it is possible to avoid the injection channel 18 on the pole shoe 14 being too large, resulting in insufficient structural strength of the pole shoe 14; and it is also possible to ensure that the stamping die of the pole shoe 14 has sufficient structural strength and improve the service life of the stamping die of the pole shoe 14.

[0070] According to some embodiments of the present invention, referring to Figure 8 , at least one through hole 19 is provided on the axial end surface of the stator tooth 13, the through hole 19 axially penetrates the stator tooth 13, the insulating skeleton 30 includes a skeleton main body 31 and connecting ribs, the skeleton main body 31 covers the outer surface of the stator core 10, the number of connecting ribs is the same as the number of through holes 19 and they correspond one by one, and the connecting ribs are received in the corresponding through holes 19. By providing at least one through hole 19 axially penetrating the stator tooth 13 on the axial end surface of the stator tooth 13, the number of connecting ribs is the same as the number of through holes 19 and they correspond one by one, and by making the connecting ribs received in the corresponding through holes 19, the through holes 19 can limit the connecting ribs, so that the insulating skeleton 30 is fixed relative to the stator core 10, and the connection between the insulating skeleton 30 and the stator core 10 is more sufficient and stable. For example, the through hole 19 can be one or two. When there are multiple through holes 19 on the axial end surface of the stator tooth 13, the multiple through holes 19 are arranged at intervals along the axial direction on the stator tooth 13.

[0071] For example, the shape of the through hole 19 can be circular or trapezoidal.

[0072] According to some embodiments of the present utility model, the stator core 10 is an annular structure formed by bending a strip-shaped stator core 10 blank. An avoidance notch 20 is formed on the inner peripheral wall of the stator yoke 12. The avoidance notch 20 axially penetrates the stator yoke 12 along the stator core 10, and the avoidance notch 20 is used to absorb and avoid the bending deformation of the stator core 10 blank. By bending the stator core 10 blank to form an annular structure to form the stator core 10, the manufacturing process of the stator core 10 can be made simpler. By providing the avoidance notch 20 on the inner peripheral wall of the stator yoke 12 and the avoidance notch 20 axially penetrating the stator yoke 12 along the stator core 10, it is possible to avoid the interference of the stator yoke 12 during the bending process of the stator core 10 blank, making it difficult to bend, so that the stator core 10 blank can be smoothly bent to form an annular structure.

[0073] According to some embodiments of the present utility model, when the stator core 10 is unfolded, the avoidance notch 20 is in a "V" shape. When the stator core 10 blank is bent and deformed, the deformation on the radially outer side of the stator core 10 blank is smaller than the deformation on the radially inner side. By making the avoidance notch 20 in a "V" shape, it is possible to avoid the interference of the stator yoke 12 and make it difficult to bend the stator core 10 blank, ensuring that the stator core 10 blank can be smoothly bent to form an annular structure.

[0074] According to some embodiments of the present utility model, referring to Figure 4 and Figure 6 , the insulating skeleton 30 includes a skeleton main body 31 and reinforcing ribs 32. The skeleton main body 31 covers the outer surface of the stator core 10. The number of reinforcing ribs 32 is the same as the number of injection molding runners 18 and they correspond to each other one by one. The reinforcing ribs 32 are received in the corresponding injection molding runners 18. By covering the outer surface of the stator core 10 with the skeleton main body 31, the outer surface of the stator core 10 can be fully insulated, preventing electrical connection between the stator core 10 and the winding. By making the insulating skeleton 30 include the reinforcing ribs 32 and the number of reinforcing ribs 32 be the same as the number of injection molding runners 18 and they correspond to each other one by one, and the reinforcing ribs 32 are received in the corresponding injection molding runners 18, the injection molding runners 18 can limit the reinforcing ribs 32, making the connection between the insulating skeleton 30 and the stator teeth 13 more firmly fixed.

[0075] According to some embodiments of the present utility model, referring to Figure 2 , the wall thickness of the skeleton main body 31 is d, and d is less than 0.7 mm. For example, the value of d can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, etc. By making the wall thickness d of the skeleton main body 31 less than 0.7 mm, the space occupied by the insulating skeleton 30 in the stator slot 11 can be reduced, thereby improving the slot fill factor of the motor and enhancing the performance of the motor; and, the amount of injection molding material for the insulating skeleton 30 can be reduced, lowering the cost.

[0076] The motor according to the second aspect embodiment of the present utility model includes: the stator structure 100 according to the first aspect embodiment of the present utility model.

[0077] The motor according to the embodiment of the present utility model, by including the stator structure 100 according to the first aspect embodiment of the present utility model, and the inner wall of the stator core 10 of the stator structure 100 facing the stator slot 11 is provided with an injection molding runner 18, can improve the fluidity of the injection molding material during the injection molding of the insulating skeleton 30, reduce the process difficulty, can reduce the thickness of the insulating skeleton 30 while ensuring the injection molding quality to improve the slot filling rate; and can reduce the injection molding scrap rate and improve the product qualification rate.

[0078] The refrigeration device according to the third aspect embodiment of the present utility model includes: the motor according to the second aspect embodiment of the present utility model.

[0079] For example, the refrigeration device is an air conditioner, and the air conditioner includes an outdoor unit and an indoor unit of the air conditioner. The outdoor unit of the air conditioner includes the motor according to the second aspect embodiment of the present utility model.

[0080] The refrigeration device according to the embodiment of the present utility model, by including the motor according to the second aspect embodiment of the present utility model, the motor includes the stator structure 100 according to the first aspect embodiment of the present utility model, and the inner wall of the stator core 10 of the stator structure 100 facing the stator slot 11 is provided with an injection molding runner 18, can improve the fluidity of the injection molding material during the injection molding of the insulating skeleton 30, reduce the process difficulty, can reduce the thickness of the insulating skeleton 30 while ensuring the injection molding quality to improve the slot filling rate; and can reduce the injection molding scrap rate and improve the product qualification rate.

[0081] Next, refer to Figures 1 - 8 Describe the stator structure 100 according to some embodiments of the present utility model.

[0082] In this embodiment, the stator structure 100 includes a stator core 10 and an insulating skeleton 30.

[0083] Among them, the stator core 10 includes a stator yoke 12, a plurality of stator teeth 13, and pole shoes 14. The plurality of stator teeth 13 are arranged on the inner circumferential side of the stator yoke 12 at intervals in the circumferential direction of the stator yoke 12. The pole shoes 14 are connected to one end of the stator teeth 13 away from the stator yoke 12. Two adjacent stator teeth 13, pole shoes 14, and the stator yoke 12 together define a stator slot 11. An injection molding runner 18 is provided on the inner wall of the stator core 10 facing the stator slot 11. The inner side wall of the stator tooth 13 facing the stator slot 11 is a first inner side wall 15, the inner side wall of the stator yoke 12 facing the stator slot 11 is a second inner side wall 16, and the inner side wall of the pole shoe 14 facing the stator slot 11 is a third inner side wall 17. The injection molding runner 18 is provided on at least one of the first inner side wall 15, the second inner side wall 16, and the third inner side wall 17. A plurality of injection molding runners 18 arranged at intervals in the radial direction of the stator tooth 13 are provided on the first inner side wall 15. Each stator tooth 13 has two first inner side walls 15 arranged opposite to each other in the circumferential direction of the stator core 10, and the central axes of the injection molding runners 18 on the two first inner side walls 15 of the stator tooth 13 are arranged staggeredly. The injection molding runner 18 is provided on both the first inner side wall 15 and the second inner side wall 16, and the cross-sectional area of the injection molding runner 18 on the second inner side wall 16 is larger than the cross-sectional area of the injection molding runner 18 on the first inner side wall 15. The injection molding runner 18 is provided on both the first inner side wall 15 and the third inner side wall 17, and the cross-sectional area of the injection molding runner 18 on the third inner side wall 17 is smaller than the cross-sectional area of the injection molding runner 18 on the first inner side wall 15.

[0084] The stator core 10 is an annular structure formed by bending a long strip-shaped stator core 10 blank. An avoidance notch 20 is formed on the inner peripheral wall of the stator yoke 12. The avoidance notch 20 penetrates the stator yoke 12 along the axial direction of the stator core 10. The avoidance notch 20 is used to absorb and avoid the bending deformation of the stator core 10 blank. When the stator core 10 is unfolded, the avoidance notch 20 is in a "V" shape.

[0085] The injection molding runner 18 is a groove formed on the stator core 10, and the cross-section of the injection molding runner 18 is arc-shaped. The arc radius of the injection molding runner 18 is R, and the value range of R is 0.2 mm to 3 mm. The injection molding runner 18 extends along the axial direction of the stator core 10. The injection molding runner 18 penetrates both axial sides of the stator core 10 along the axial direction of the stator core 10.

[0086] The insulating skeleton 30 is integrally injection-molded on the stator core 10. The insulating skeleton 30 includes a skeleton main body 31 and reinforcing ribs 32. The skeleton main body 31 covers the outer surface of the stator core 10. The number of the reinforcing ribs 32 is the same as the number of the injection molding runners 18 and they correspond to each other one by one. The reinforcing ribs 32 are accommodated in the corresponding injection molding runners 18. The wall thickness of the skeleton main body 31 is d, and d is less than 0.7 mm.

[0087] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0088] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features.

[0089] In the description of the present utility model, the meaning of "a plurality of" is two or more.

[0090] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0091] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A stator structure, characterized in that, Comprising: A stator core, formed with a plurality of stator slots arranged at intervals in the circumferential direction of the stator core, and an injection molding runner is provided on the inner wall of the stator core facing the stator slots; An insulating skeleton, integrally injection molded on the stator core.

2. The stator structure according to claim 1, characterized in that, The injection molding runner extends along the axial direction of the stator core.

3. The stator structure according to claim 2, characterized in that, The injection molding runner axially penetrates both axial sides of the stator core along the axial direction of the stator core.

4. The stator structure according to claim 1, characterized in that, The injection molding runner is a groove formed on the stator core.

5. The stator structure according to claim 1, characterized in that The cross-section of the injection molding runner is arc-shaped.

6. The stator structure according to claim 5, wherein The radius of the arc of the injection molding runner ranges from 0.2 mm to 3 mm.

7. The stator structure according to claim 1, wherein The stator core includes a stator yoke, a plurality of stator teeth, and pole shoes. The plurality of stator teeth are arranged on the inner circumferential side of the stator yoke at intervals in the circumferential direction of the stator yoke, and the pole shoes are connected to the ends of the stator teeth far from the stator yoke. Adjacent two of the stator teeth, the pole shoes, and the stator yoke jointly define the stator slots; Wherein, the inner side wall of the stator tooth facing the stator slot is the first inner side wall, the inner side wall of the stator yoke facing the stator slot is the second inner side wall, the inner side wall of the pole shoe facing the stator slot is the third inner side wall, and the injection molding runner is provided on at least one of the first inner side wall, the second inner side wall, and the third inner side wall.

8. The stator structure according to claim 7, wherein The injection molding runner extends along the axial direction of the stator core, and a plurality of the injection molding runners are arranged at intervals in the radial direction of the stator tooth on the first inner side wall.

9. The stator structure according to claim 7, characterized in that The injection molding runner extends along the axial direction of the stator core, and the injection molding runner is provided on the first inner side wall. Each stator tooth has two first inner side walls arranged opposite to each other in the circumferential direction of the stator core, and the central axes of the injection molding runners on the two first inner side walls of the stator tooth are staggeredly arranged.

10. The stator structure according to claim 7, characterized in that, The injection molding runner is provided on both the first inner side wall and the second inner side wall, and the cross-sectional area of the injection molding runner on the second inner side wall is larger than the cross-sectional area of the injection molding runner on the first inner side wall.

11. The stator structure according to claim 7, characterized in that, The injection molding runner is provided on both the first inner side wall and the third inner side wall, and the cross-sectional area of the injection molding runner on the third inner side wall is smaller than the cross-sectional area of the injection molding runner on the first inner side wall.

12. The stator structure according to claim 7, wherein, At least one through hole is provided on the axial end face of the stator tooth, the through hole axially penetrates the stator tooth, the insulating skeleton includes a skeleton main body and connecting ribs, the number of the connecting ribs is the same as the number of the through holes and they correspond to each other one by one, and the connecting ribs are received in the corresponding through holes.

13. The stator structure according to claim 7, characterized in that, The stator core is an annular structure formed by bending a long strip-shaped stator core blank, and an avoidance notch is formed on the inner circumferential wall of the stator yoke. The avoidance notch axially penetrates the stator yoke along the axial direction of the stator core, and the avoidance notch is used to absorb and avoid the bending deformation of the stator core blank.

14. The stator structure according to claim 13, wherein, When the stator core is unfolded, the avoidance notch is in a "V" shape.

15. The stator structure according to claim 1, wherein, The insulating skeleton includes a skeleton main body and reinforcing ribs. The skeleton main body is coated on the outer surface of the stator core. The number of the reinforcing ribs is the same as that of the injection molding runners and they correspond to each other one by one. The reinforcing ribs are accommodated in the corresponding injection molding runners.

16. The stator structure according to claim 15, wherein The wall thickness of the skeleton main body is less than 0.7 mm.

17. A motor, characterized in that, Comprising: The stator structure according to any one of claims 1-16.

18. A refrigeration device, characterized in that, Comprising: The motor according to claim 17.

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