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, m groups of stator windings, 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 group of stator windings comprises at least one stator winding, the stator winding comprises a winding body and a winding joint, the winding body is wound on the stator teeth, the winding joint is connected to the winding body, the group of stator windings is correspondingly provided with a winding joints, the lead-out wire assembly comprises a plurality of wire harness groups, the first terminal is installed on the end face of the stator iron core, and the second terminal is installed on the end face of the stator iron core. A first terminal is correspondingly provided with b first grooves, at least one winding joint or at least one wire harness group is crimped in each first groove, and b is greater than or equal to m-1 and less than or equal to (a * m + 1); 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] m groups of stator windings, each group of stator windings including at least one stator winding, each stator winding including a winding body and a winding connector, the winding body being wound around the stator teeth, the winding connector being connected to the winding body, and each group of stator windings correspondingly being provided with a winding connector;

[0007] a lead assembly comprising a plurality of wire harness groups; and

[0008] a plurality of first terminals, each of the first terminals being mounted on an end surface of the stator core, each of the first terminals being provided with b first slots, each of the first slots being crimped with at least one of the winding connectors or at least one of the wiring harness groups;

[0009] Among them, m-1≤b≤(a×m+1).

[0010] In one embodiment, the first terminal includes n connected sheet-shaped portions arranged along the radial direction of the stator core, where 1≤n≤2.

[0011] In one embodiment, at most two winding connectors or at most two wiring harness groups are crimped into each of the first slots; and / or at most one winding connector and one wiring harness group are crimped into each of the first slots at the same time.

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

[0013] 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 c, where 6≤c≤36.

[0014] 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.

[0015] In one embodiment, the first groove includes an opening section and a main body section connected to each other, and the width of the opening section is gradually increased in a direction away from the main body section.

[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, m groups of stator windings, 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. A group of stator windings includes at least one stator winding. The stator winding includes a winding body and a winding joint. The winding body is wound around the stator teeth, and the winding joint is connected to the winding body. A group of stator windings is correspondingly provided with a winding joint. The lead wire assembly includes multiple wiring harness groups. The first terminal is installed on the end face of the stator core. A first terminal is correspondingly provided with b first slots. At least one winding joint or at least one wiring harness group is crimped in each first slot, wherein m-1≤b≤(a×m+1). It can be understood that by reasonably setting the number of first slots on the first terminal, it is possible to reduce the temperature rise of the connection point in the first slot while ensuring a safe distance between the conductive wire and the motor housing. Compared with the lead wire woven from multiple thin copper wires in the existing technical solution, the technical solution of the utility model enables the winding connector and the wiring harness to be electrically connected through the first terminal, so that the motor stator can use a wiring harness with a larger wire diameter, and can ensure the reliability of the connection between the conductive wire and the stator winding. The manufacturing process of the wiring harness 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 wire diameter and 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. 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 Data graph showing the temperature rise at the connection point and the safe distance between the first terminal and the outer diameter of the stator core when the number of first slots in the stator is changed;

[0023] Figure 3 for Figure 1 A top view of

[0024] Figure 4 Schematic diagram of the structure of the first terminal when n=1;

[0025] Figure 5 Schematic diagram of the structure of the first terminal when n=2;

[0026] Figure 6 for Figure 1 Schematic diagram of the structure of the lead wire assembly.

[0027] Description of Figure Numbers:

[0028] 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.

[0029] 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

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Reference Figures 1 to 3 The present invention proposes a stator, comprising:

[0034] A stator core 10, comprising a stator yoke and a plurality of stator teeth spaced apart inside the stator yoke;

[0035] m groups of stator windings 20, each group of stator windings 20 including at least one stator winding 20, each stator winding 20 including a winding body and a winding connector, the winding body being wound around the stator teeth, the winding connector being connected to the winding body, and each group of stator windings 20 correspondingly being provided with a winding connector;

[0036] The lead wire assembly 30 includes a plurality of wire harness groups 31; and

[0037] A plurality of first terminals 40 , each of which is mounted on an end surface of the stator core 10 , each of which is provided with b first slots 42 , and each of which is crimped with at least one winding connector or at least one wiring harness group 31 ;

[0038] Among them, m-1≤b≤(a×m+1).

[0039] The stator in the technical solution of the present invention includes a stator core 10, m groups of stator windings 20, a lead wire assembly 30 and multiple first terminals 40. The stator core 10 includes a stator yoke and multiple stator teeth spaced apart on the inner side of the stator yoke. A group of stator windings 20 includes at least one stator winding 20. The stator winding 20 includes a winding body and a winding joint. The winding body is wound around the stator teeth, and the winding joint is connected to the winding body. A group of stator windings 20 is correspondingly provided with a winding joint. The lead wire assembly 30 includes multiple wiring harness groups 31. The first terminal 40 is installed on the end surface of the stator core 10. A first terminal 40 is correspondingly provided with b first slots 42. At least one winding joint or at least one wiring harness group 31 is crimped in each first slot 42, wherein m-1≤b≤(a×m+1). It can be understood that by reasonably setting the number of first slots 42 on the first terminal 40, it is possible to reduce the temperature rise of the connection point in the first slot 42 while ensuring a safe distance between the conductive wire and the motor housing. Compared with the lead wire woven from multiple thin copper wires in the existing technical solution, the technical solution of the utility model enables the winding connector and the wiring harness group 31 to be electrically connected through the first terminal 40, so that the motor stator can use a wiring harness group 31 with a larger wire diameter, and can ensure the reliability of the connection between the conductive wire and the stator winding 20. The manufacturing process of the wiring harness group 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 realizing the automated connection of the conductive wire to the stator winding 20.

[0040] Reference Figure 2, where a×m represents the total number of winding joints corresponding to a stator, and the safety distance between the first terminal 40 and the outer diameter of the stator core 10 is defined as d. If b<m-1, the temperature rise of the connection point of the winding joint in the first slot 42 is relatively high. This is because multiple winding joints and / or multiple wiring harness groups 31 are crimped in each first slot 42, which makes the temperature of the connection point between the winding joint and the wiring harness group 31 in the first slot 42 relatively high, which can easily lead to material aging and performance degradation at the connection point in the first slot 42, and even cause failures or accidents. If b > (a × m + 1), it indicates that some first slots 42 are idle, reducing the utilization of the first terminal 40 and increasing the size and material cost of the first terminal 40. This is detrimental to stator miniaturization and increases stator production costs. Furthermore, as the value of b gradually increases, the safe distance between the first terminal 40 and the outer circumference of the stator core 10 decreases. This is because if more first slots 42 are required on the first terminal 40, the size of the first terminal 40 must be increased, which reduces the safe distance between the first terminal 40 and the outer diameter of the stator core 10, thereby reducing the safety and reliability of the stator. Therefore, by rationally setting m-1 ≤ b ≤ (a × m + 1), the temperature rise at the connection point within the first slot 42 is reduced while maintaining a safe distance between the conductive wire and the motor housing.

[0041] 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.

[0042] 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.

[0043] Reference Figure 1 、 Figure 4 as well as Figure 5 Specifically, the first terminal 40 includes n sheet-like portions 41 connected to each other along the radial direction of the stator core 10, where 1≤n≤2. When the first terminal 40 has two sheet-like portions 41, the two sheet-like portions 41 are arranged 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 size of the first terminal 40 along the radial direction of the stator core 10 will be too large, 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 the motor.

[0044] Furthermore, each of the first slots 42 is crimped with at most two winding connectors or at most two wiring harness groups 31; and / or each of the first slots 42 is crimped with at most one winding connector and one wiring harness group 31 simultaneously. It is understandable that heat is generated at the connection points in the first slots 42 used for crimping the winding connectors and the wiring harness groups 31. If more than two winding connectors and two wiring harness groups 31 are crimped in the first slots 42, a large amount of heat will be generated in the slot walls of the first slots 42, the winding connectors, and the wiring harness groups 31, resulting in a sharp increase in the temperature of the connection points in the first slots 42, which can easily lead to material aging and performance degradation at the connection points in the first slots 42, and even cause failures or accidents.

[0045] Specifically, 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 can 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.

[0046] In one embodiment, a stator slot is formed between the stator yoke and two adjacent stator teeth. The number of stator slots is c, where 6≤c≤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] Specifically, the first slot 42 includes an opening section 421 and a main section 422 connected to each other. 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] Reference Figure 6In one embodiment, the lead wire assembly 30 comprises a braided wire harness 31 or an enameled wire harness 31 wrapped in an insulating sleeve, thereby improving insulation between the harnesses 31. Furthermore, the lead wire assembly 30 is secured to the stator using binding wires, cable ties, or heat shrink tubing. Bundling the harnesses 31 reduces electromagnetic interference and signal crosstalk between the harnesses, improving the device's electrical performance. Bundling effectively protects the harnesses from external physical damage, such as pulling, squeezing, and friction, thereby extending the service life of the harnesses 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; m groups of stator windings, each group of stator windings including at least one stator winding, each stator winding including a winding body and a winding connector, the winding body being wound around the stator teeth, the winding connector being connected to the winding body, and each group of stator windings correspondingly being provided with a winding connector; a lead assembly comprising a plurality of wire harness groups; and a plurality of first terminals, each of the first terminals being mounted on an end surface of the stator core, each of the first terminals being provided with b first slots, each of the first slots being crimped with at least one of the winding connectors or at least one of the wiring harness groups; Among them, m-1≤b≤(a×m+1).

2. The stator according to claim 1, characterized in that The first terminal includes n connected sheet parts arranged along the radial direction of the stator core, where 1≤n≤2.

3. The stator according to claim 1, wherein: At most two winding joints or at most two wiring harness groups are crimped into each of the first slots; and / or In each of the first slots, at most one winding connector and one wiring harness group are crimped simultaneously.

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: A stator slot is formed between the stator yoke and two adjacent stator teeth. The number of the stator slots is c, and 6≤c≤36.

6. 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.

7. The stator according to claim 1, wherein: The first slot includes an opening section and a main body section connected to each other, and the width of the opening section is gradually increased in a direction away from the main body section.

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.

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