Stator, motor, compressor and refrigeration equipment

Abstract

The utility model discloses a stator, a motor, a compressor and refrigeration equipment, and relates to the refrigeration equipment technology field, the stator comprises a stator iron core, a stator winding, an outgoing line assembly and a plurality of first terminals, the stator iron core comprises a stator yoke and a plurality of stator teeth arranged at an inner side of the stator yoke at intervals, the stator winding comprises a winding body, a winding joint and a transition section, the winding body is wound on the stator teeth, the transition section is connected between the winding body and the winding joint, the leading-out wire assembly comprises a plurality of wire harness groups, the first terminal is installed on the stator iron core, and at least one first groove is formed in the first terminal; at least one winding joint or at least one wire harness group is crimped in each first groove, the first terminal comprises a sheet-shaped part arranged along the radial direction of the stator iron core, the diameter of the transition section is d, the thickness of the sheet-shaped part is e, and the minimum width of the first groove is W. According to the technical scheme provided by the utility model, the difficulty of the manufacturing process of the outgoing line assembly is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, and in particular to a stator, a motor, a compressor and refrigeration equipment. Background Art

[0002] In a compressor, the external lead wires of the motor windings are mostly woven from multiple thin copper wires. The manufacturing process of such lead wires is complex and the cost is high, and the process of connecting them to the motor coils is also relatively complex. Utility Model Content

[0003] The main purpose of the utility model is to provide a stator, a motor, a compressor and a refrigeration device, aiming to reduce the difficulty of the manufacturing process of the lead wire assembly.

[0004] To achieve the above-mentioned purpose, the stator proposed in the present invention includes:

[0005] a stator core, the stator core comprising a stator yoke and a plurality of stator teeth spaced apart and arranged inside the stator yoke;

[0006] a stator winding, the stator winding comprising a winding body, a winding joint, and a transition section, the winding body being wound around the stator teeth, the transition section being connected between the winding body and the winding joint;

[0007] A lead assembly, including a plurality of wire harness groups;

[0008] a plurality of first terminals, each of the first terminals being mounted on the stator core, each of the first terminals being provided with at least one first slot, each of the first slots being crimped with at least one winding connector or at least one wiring harness group, and each of the first terminals including a sheet-shaped portion radially extending along the stator core;

[0009] The diameter of the transition section is d, the thickness of the sheet portion is e, and the minimum width of the first groove is w.

[0010] In one embodiment, there are n sheet-like portions, and the first grooves are provided in the sheet-like portions, where 1≤n≤2.

[0011] In one embodiment,

[0012] In one embodiment, the distance between two adjacent first terminals is s, where s≥0.5 mm.

[0013] In one embodiment, e≧0.4 mm.

[0014] In one embodiment, a stator slot is formed between the stator yoke and two adjacent stator teeth, and the number of the stator slots is a, where 6≤a≤36.

[0015] In one embodiment, a snap-fit ​​hole is provided on the first terminal, a snap-fit ​​protrusion is provided on the stator core, and the first terminal is connected to the stator core through the matching snap fit between the snap-fit ​​protrusion and the snap-fit ​​hole.

[0016] The utility model also provides a motor, comprising the stator as described above.

[0017] The utility model also provides a compressor, comprising the motor as described above.

[0018] The utility model also provides a refrigeration device, comprising the compressor as described above.

[0019] The stator in the technical solution of the present invention includes a stator core, a stator winding, a lead wire assembly and multiple first terminals. The stator core includes a stator yoke and multiple stator teeth spaced apart on the inner side of the stator yoke. The stator winding includes a winding body, a winding joint and a transition section. The winding body is wound on the stator teeth. The transition section is connected between the winding body and the winding joint. The lead wire assembly includes multiple wire harness groups. The first terminal is installed on the stator core. At least one first slot is provided on the first terminal. At least one winding joint or at least one wire harness group is crimped in each first slot. Compared with the lead wire woven from multiple fine copper wires in the existing technical solution, the technical solution of the present invention enables the motor stator to adopt a wire harness group with a larger wire diameter by electrically connecting the winding joint and the wire harness group through the first terminal, and can ensure the reliability of the connection between the conductive wire and the stator winding. The manufacturing process of the wire harness group with a large wire diameter is simpler, thereby reducing the difficulty of the manufacturing process of the lead wire assembly and reducing the manufacturing cost of the lead wire assembly. At the same time, the first terminal can directly crimp the conductive wire with a large diameter to the stator winding, making the process of connecting the conductive wire to the stator winding simpler, thereby enabling the automated connection of the conductive wire to the stator winding. Furthermore, the diameter of the transition section is d, the thickness of the sheet portion is e, and the minimum width of the first slot is w. Thus, while increasing the current density at the crimping point of the winding joint in the first slot, the wire breakage rate at the crimping point of the winding joint is reduced, thereby increasing the service life of the stator winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 A schematic structural diagram of a stator according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A graph showing the changes in current density and wire breakage rate at the crimping point between the winding joint and the first slot wall in the middle stator;

[0023] Figure 3 Schematic diagram of the structure of the first terminal when n=1;

[0024] Figure 4 Schematic diagram of the structure of the first terminal when n=2;

[0025] Figure 5 for Figure 1 Schematic diagram of the structure of the lead wire assembly.

[0026] Description of Figure Numbers:

[0027] 10. Stator core; 20. Stator winding; 30. Lead wire assembly; 31. Wire harness assembly; 40. First terminal; 41. Sheet portion; 42. First slot; 421. Opening section; 422. Main body section.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] 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 implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning 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.

[0032] Reference Figures 1 to 5 The present invention proposes a stator, comprising:

[0033] A stator core 10, comprising a stator yoke and a plurality of stator teeth spaced apart inside the stator yoke;

[0034] The stator winding 20 includes a winding body, a winding joint, and a transition section. The winding body is wound around the stator teeth, and the transition section is connected between the winding body and the winding joint.

[0035] The lead wire assembly 30 includes a plurality of wire harness groups 31;

[0036] A plurality of first terminals 40, each of which is mounted on the stator core 10, and each of which is provided with at least one first slot 42, wherein at least one winding connector or at least one wiring harness group 31 is crimped into each first slot 42, and each of which includes a sheet portion 41 radially extending along the stator core 10;

[0037] The diameter of the transition section is d, the thickness of the sheet portion 41 is e, and the minimum width of the first groove 42 is w.

[0038] The stator in the technical solution of the present invention includes a stator core 10, a stator winding 20, a lead wire assembly 30 and a plurality of first terminals 40. The stator core 10 includes a stator yoke and a plurality of stator teeth spaced apart on the inner side of the stator yoke. The stator winding 20 includes a winding body, a winding joint and a transition section. The winding body is wound on the stator teeth. The transition section is connected between the winding body and the winding joint. The lead wire assembly 30 includes a plurality of wire harness groups 31. The first terminal 40 is installed on the stator core 10. The first terminal 40 is provided with at least one first slot 42. Each first slot 42 has a pressure inside. At least one winding connector or at least one wiring harness assembly 31 is connected. Compared with the lead wires woven from multiple thin copper wires in the prior art, the technical solution of the present invention electrically connects the winding connector and the wiring harness assembly 31 through the first terminal 40, thereby enabling the motor stator to use a wiring harness assembly 31 with a larger wire diameter and ensuring the reliability of the connection between the conductive wire and the stator winding 20. The manufacturing process of the wiring harness assembly 31 with a large wire diameter is simpler, thereby reducing the difficulty of the manufacturing process of the lead wire assembly 30 and reducing the manufacturing cost of the lead wire assembly 30. At the same time, the first terminal 40 can directly crimp the conductive wire with a large wire diameter and the stator winding 20, making the process of connecting the conductive wire to the stator winding 20 simpler, thereby enabling the conductive wire to be automatically connected to the stator winding 20.

[0039] Reference Figure 2 , further, the diameter of the transition section is d, the thickness of the sheet portion 41 is e, and the minimum width of the first groove 42 is w, It is understandable that the diameter of the winding joint before being crimped with the first terminal 40 is the same as the diameter of the transition section. However, when the winding joint is crimped, in order to improve the stability and reliability of the connection between the winding joint and the first terminal 40, the winding joint is crimped into the corresponding first groove 42 with force, so that the winding joint will be deformed and crimped into the corresponding first groove 42. When the value of d increases, that is, when the diameter of the transition section increases, It will also increase accordingly. When the diameter of the transition section increases, it means that the deformation variable generated by the winding joint during the crimping process is greater, and the wire breakage rate at the crimping part of the winding joint is higher. At the same time, the greater the deformation variable, the greater the contact area between the winding joint and the wall of the first slot 42, and the smaller the current density at the crimping part between the winding joint and the wall of the first slot 42. Among them, excessive current density at the crimping part between the winding joint and the wall of the first slot 42 will cause the wire at the crimping part of the winding joint to overheat. Long-term high-temperature operation will not only shorten the service life of the wire, but may also accelerate the aging and melting of the insulating material, and even cause a fire, and even easily cause the winding to be burned. A high wire breakage rate at the crimping part between the winding joint and the wall of the first slot 42 will cause the winding joint to break, thereby reducing the yield rate of the stator. Therefore, taking all factors into consideration, Thus, while increasing the current density at the winding joint crimping point in the first slot 42 , the wire breakage rate at the winding joint crimping point is reduced, thereby increasing the service life of the stator winding 20 .

[0040] Specifically, the motor stator includes a stator core 10 and a stator winding 20, and the motor stator is used to generate a rotating magnetic field. The stator core 10 is made of laminated silicon steel plates. The stator core 10 includes a stator yoke and stator teeth. The stator yoke is annular, and a plurality of stator teeth are arranged on the inner side of the stator yoke at intervals along the circumference of the stator yoke. Stator slots are defined between adjacent stator teeth, and the number of stator slots is consistent with the number of stator teeth. The stator winding 20 includes a winding body, a winding joint, and a transition section. The winding body passes through the stator slots and is directly wound on the stator teeth. The winding joint is used to connect to the lead wire assembly 30 to electrically connect to the external circuit. The motor stator is used to be mounted on the outer circumference of the motor rotor. When three-phase alternating current is passed through the stator winding 20, a rotating magnetic field is generated, and the permanent magnets on the motor rotor interact with the rotating magnetic field to generate torque, thereby driving the motor to rotate to achieve normal operation of the motor.

[0041] The lead wire assembly 30 has a plurality of wire harness groups 31, and each first terminal 40 is crimped with a wire harness group 31. The wire harness group 31 is used to connect the stator winding 20 to an external circuit or control system. Each wire harness group 31 has x conductive wires, where x is a positive integer of 1 or greater. The wire diameter of each conductive wire is the same, and the wire diameter of the conductive wire can be measured by a game caliper or a micrometer. The portion of the conductive wire that is not wrapped with an insulating layer can be measured directly; for the conductive wire wrapped with an insulating layer, a small section of the insulating layer can be removed first to measure the diameter of the bare copper wire to obtain the wire diameter of the conductive wire. The specific measurement method is the same as the measurement method of the transition section and will not be repeated here.

[0042] Specifically, n number of the sheet portions 41 are provided, and the first slots 42 are provided in the sheet portions 41, where 1≤n≤2. When the first terminal 40 has two sheet portions 41, the two sheet portions 41 are provided on opposite sides of the insulating frame along the radial direction of the stator core 10. The insulating frame is mounted on the stator core 10, and the first terminal 40 is mounted on the insulating frame. If n>2, the first terminal 40 will be too large in the radial direction of the stator core 10, thereby occupying the installation space of other stator components, thereby increasing the size of the stator, which is not conducive to the miniaturization of the stator and motor.

[0043] Furthermore, Wherein, d is the diameter of the transition section, w is the minimum width of the first groove 42, when When , it means that the value of d is much greater than w, which causes the winding joint to produce a large deformation when it is crimped into the first slot 42, resulting in a high wire breakage rate at the crimping point between the winding joint and the first slot 42 wall, thereby reducing the quality rate of the stator winding 20 and shortening the service life of the stator winding 20. When the winding joint is pressed into the first slot 42, the d value must be greater than the w value, so when At this time, d is only slightly larger than w, so the deformation of the winding joint and the first slot 42 slot wall during crimping is small, resulting in a smaller contact area between the winding joint and the first slot 42 slot wall, and then making the current density between the winding joint and the first slot 42 slot wall crimping is large, which can easily lead to overheating of the wire at the winding joint crimping part. Long-term high-temperature operation will not only shorten the service life of the wire, but may also accelerate the aging and melting of the insulating material, and even cause a fire, and even easily cause the winding to be burned, thereby reducing the service life of the winding joint.

[0044] In one embodiment, the spacing between two adjacent first terminals 40 is s, where s ≥ 0.5 mm. If s < 0.5 mm, the spacing between the two adjacent first terminals 40 is too small, which may reduce the electrical insulation performance between the two adjacent first terminals 40. During motor operation, due to changes in current and voltage and possible electromagnetic interference, a too small spacing can easily lead to electrical breakdown or short circuits, thereby damaging the motor or causing safety accidents. Furthermore, the first terminals 40 not only serve as electrical connections in the motor but may also participate in the heat dissipation process. If the spacing between two adjacent first terminals 40 is too small, the heat dissipation space between them will be limited, making it difficult to effectively dissipate heat. This may increase the temperature of the first terminals 40 and surrounding electrical components, thereby affecting the overall performance and life of the motor. Finally, when the spacing between two adjacent first terminals 40 is too small, subsequent maintenance work may be difficult. When replacing or repairing the winding connector, the wiring harness assembly 31, or the first terminals 40 themselves, the too small spacing may limit the operating space, increasing maintenance difficulty and cost.

[0045] In one embodiment, e ≥ 0.4 mm. Here, e is the thickness of the sheet portion 41. If e < 0.4 mm, the sheet portion 41 is too thin, which can easily cause deformation or damage to the winding connector and wire assembly 31 when crimped into the first slot 42, thereby reducing the service life of the first terminal 40. Insufficient terminal thickness results in a small contact area between the winding connector and wire assembly 31 and the wall of the first slot 42, affecting the stability of the crimping point and causing excessive current density in the crimping point. This can further affect the aging of the first terminal 40 and the stator winding 20, and may even cause a fire, thereby reducing the service life of the first terminal 40 and the stator winding 20.

[0046] In one embodiment, a stator slot is formed between the stator yoke and two adjacent stator teeth. The number of stator slots is a, where 6≤a≤36. A stator winding 20 is wound around each stator slot. If c>36, a larger number of stator slots is required, which in turn requires more stator windings 20 and insulation material, increasing the manufacturing cost of the stator. Excessive stator slots reduce the ventilation space within the stator slots, making it difficult to dissipate heat from the windings. Consequently, after long-term operation, the stator winding 20 may heat up excessively, potentially aging the insulation material and reducing the stator's service life or even causing burnout. Excessive stator slots may cause the motor to generate more vibration and noise during operation, affecting its operational stability and reliability. If c < 6, it means that the number of stator slots is too small. A small number of stator slots will increase the magnetic density of the tooth tips of the stator core 10 and the air gap, thereby reducing the power factor of the motor. At the same time, a small number of slots will increase the torque pulsation of the motor, affecting the running stability of the motor. Finally, a small number of slots may lead to the generation of harmonic magnetic fields, which in turn causes increased vibration and noise of the motor. Too few stator slots may not fully utilize the magnetic circuit structure of the motor, resulting in reduced motor efficiency. Therefore, by reasonably setting the number of stator slots, the efficiency, heat dissipation, stability and production cost of the stator can be kept within a reasonable range.

[0047] Specifically, the first terminal 40 is provided with a snap-fit ​​hole, and the stator core 10 is provided with a snap-fit ​​protrusion. The first terminal 40 is connected to the stator core 10 through the engagement of the snap-fit ​​protrusion and the snap-fit ​​hole. This snap-fit ​​connection is stable, reliable, and easy to install, thereby improving the installation and removal efficiency of the first terminal 40, increasing the connection strength of the first terminal 40, and further enhancing the stability and reliability of the first terminal 40.

[0048] Furthermore, the first slot 42 includes an opening section 421 and a main section 422 connected thereto, wherein the width of the opening section 421 gradually increases in a direction away from the main section 422. The provision of the opening section 421 facilitates the insertion of the winding connector and / or the wiring harness assembly 31 into the main section 422 through the opening section 421, thereby improving the efficiency of crimping the winding connector and the wiring harness assembly 31.

[0049] In one embodiment, the lead wire assembly 30 is a braided wire harness assembly 31 or an enameled wire harness assembly 31 wrapped in an insulating sleeve, thereby improving the insulation between the harness assemblies 31. Furthermore, the lead wire assembly 30 needs to be tied with wires, cable ties, or secured to the stator via heat shrink tubing. Bundling the harness assemblies 31 reduces electromagnetic interference and signal crosstalk between the harnesses, improving the electrical performance of the device. Bundling effectively protects the harness from external physical damage, such as pulling, squeezing, and friction, thereby extending the service life of the harness assemblies 31. It also improves the stator's appearance and facilitates subsequent maintenance.

[0050] The present invention also proposes a motor, which includes a stator. The specific structure of the stator refers to the above embodiments. Since the motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0051] The present invention also proposes a compressor, which includes a motor. The specific structure of the motor refers to the above embodiments. Since the compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0052] The present invention also proposes a refrigeration device, which includes a compressor. The specific structure of the compressor refers to the above embodiment. Since the present refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0053] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A stator, characterized in that: include: a stator core, the stator core comprising a stator yoke and a plurality of stator teeth spaced apart and arranged inside the stator yoke; a stator winding, the stator winding comprising a winding body, a winding joint, and a transition section, the winding body being wound around the stator teeth, the transition section being connected between the winding body and the winding joint; A lead assembly, including a plurality of wire harness groups; a plurality of first terminals, each of the first terminals being mounted on the stator core, each of the first terminals being provided with at least one first slot, each of the first slots being crimped with at least one winding connector or at least one wiring harness group, and each of the first terminals including a sheet-shaped portion radially extending along the stator core; The diameter of the transition section is d, the thickness of the sheet portion is e, and the minimum width of the first groove is w.

2. The stator according to claim 1, wherein: There are n pieces of the sheet-like portion, and the first groove is provided in the sheet-like portion, 1≤n≤2.

3. The stator according to claim 1, wherein:

4. The stator according to claim 1, wherein: The distance between two adjacent first terminals is s, where s is ≥ 0.5 mm.

5. The stator according to claim 1, wherein: e≥0.4mm.

6. The stator according to claim 1, wherein: A stator slot is formed between the stator yoke and two adjacent stator teeth. The number of the stator slots is a, and 6≤a≤36.

7. The stator according to claim 1, wherein: The first terminal is provided with a clamping hole, the stator core is provided with a clamping protrusion, and the first terminal is connected to the stator core through the matching clamping of the clamping protrusion and the clamping hole.

8. A motor, characterized in that: Comprising a stator according to any one of claims 1 to 7.

9. A compressor, characterized in that: Comprising the motor as claimed in claim 8.

10. A refrigeration device, characterized in that: Comprising the compressor of claim 9.

Images