Stator, motor, compressor and refrigeration equipment

Abstract

The invention discloses a stator, a motor, a compressor and refrigeration equipment, and relates to the technical field of refrigeration equipment, the stator comprises a stator core, m groups of stator windings, an outgoing line assembly and a plurality of first terminals, the stator core comprises a stator yoke and a plurality of stator teeth arranged at the 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 invention, the difficulty of the manufacturing process of the outgoing line assembly is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of refrigeration equipment, and particularly to a stator, motor, compressor, and refrigeration equipment. Background Technology

[0002] In compressors, the external leads of the motor windings are mostly made of multiple fine copper wires braided together. The manufacturing process of these leads is complex and costly, and the process of connecting them to the motor coils is also quite complicated. Summary of the Invention

[0003] The main objective of this invention is to provide a stator, motor, compressor, and refrigeration equipment that aims to reduce the difficulty of manufacturing the lead wire assembly.

[0004] To achieve the above objectives, the stator proposed in this invention includes:

[0005] A stator core, the stator core comprising a stator yoke and a plurality of stator teeth spaced apart on the inner side of the stator yoke;

[0006] m sets of stator windings, each set of stator windings includes at least one stator winding, each stator winding includes a winding body and a winding connector, the winding body is wound on the stator teeth, the winding connector is connected to the winding body, and each set of stator windings is provided with a winding connectors.

[0007] Lead wire assembly, including multiple wire harness groups; and

[0008] Multiple first terminals are mounted on the end face of the stator core. Each first terminal has b first slots, and at least one winding connector or at least one wire harness group is crimped into each first slot.

[0009] Where m-1≤b≤(a×m+1).

[0010] In one embodiment, the first terminal includes n connected plate-like portions arranged radially along the stator core, where 1 ≤ n ≤ 2.

[0011] In one embodiment, up to two of the winding connectors or up to two of the wire harness groups are crimped into each of the first slots; and / or up to one of the winding connectors and one of the wire harness groups are crimped into each of the first slots simultaneously.

[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 there are c stator slots, where 6 ≤ c ≤ 36.

[0014] In one embodiment, the first terminal is provided with a snap-fit ​​hole, and the stator core is provided with a snap-fit ​​protrusion. The first terminal is connected to the stator core by the engagement of the snap-fit ​​protrusion and the snap-fit ​​hole.

[0015] In one embodiment, the first groove includes an open section and a main body section connected together, wherein the width of the open section gradually increases in a direction away from the main body section.

[0016] The present invention also proposes an electric motor, including a stator as described above.

[0017] The present invention also proposes a compressor comprising the motor described above.

[0018] The present invention also proposes a refrigeration device, including the compressor described above.

[0019] The stator in the technical solution of the present invention includes a stator core, m sets of stator windings, lead wire assembly, and multiple first terminals. The stator core includes a stator yoke and multiple stator teeth spaced apart inside the stator yoke. Each set of stator windings includes at least one stator winding, which includes a winding body and a winding connector. The winding body is wound around the stator teeth, and the winding connector is connected to the winding body. Each set of stator windings has a corresponding number of winding connectors. The lead wire assembly includes multiple wire harness groups. The first terminal is installed on the end face of the stator core, and each first terminal has a corresponding number of b first slots. At least one winding connector or at least one wire harness group is crimped into each first slot, wherein m-1≤b≤(a×m+1). Understandably, by rationally setting the number of first slots on the first terminal, the temperature rise at the connection point within the first slot can be reduced while ensuring a safe distance between the conductive wire and the motor housing. Compared to the lead wires braided from multiple fine copper wires in existing technologies, this invention connects the winding connector and the wire harness group electrically through the first terminal. This allows the motor stator to use a wire harness group with a larger wire diameter, ensuring the reliability of the connection between the conductive wire and the stator winding. The manufacturing process of the large-diameter wire harness group is simpler, thus reducing the manufacturing difficulty and cost of the lead wire assembly. Simultaneously, the first terminal can directly crimp the large-diameter conductive wire and the stator winding, simplifying the connection process and enabling automated connection between the conductive wire and the stator winding. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a stator embodiment provided by the present invention;

[0022] Figure 2 for Figure 1 Relevant data graphs on 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 the first slots of the stator changes;

[0023] Figure 3 for Figure 1 Top view;

[0024] Figure 4 This is a schematic diagram of the structure of the first terminal when n=1;

[0025] Figure 5 This is a schematic diagram of the structure of the first terminal when n=2;

[0026] Figure 6 for Figure 1 A schematic diagram of the structure of the lead-out assembly.

[0027] Explanation of icon numbers:

[0028] 10. Stator core; 20. Stator winding; 30. Lead wire assembly; 31. Wire harness assembly; 40. First terminal; 41. Sheet-shaped part; 42. First slot; 421. Open section; 422. Main body section.

[0029] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are 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 positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

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

[0034] The stator core 10 includes a stator yoke and a plurality of stator teeth spaced apart on the inner side of the stator yoke;

[0035] m sets of stator windings 20, each set of stator windings 20 includes at least one stator winding 20, each stator winding 20 includes a winding body and a winding connector, the winding body is wound on the stator teeth, and the winding connector is connected to the winding body, and each set of stator windings 20 is provided with a winding connectors.

[0036] Lead wire assembly 30 includes multiple wire harness groups 31; and

[0037] Multiple first terminals 40 are mounted on the end face of the stator core 10. Each first terminal 40 is provided with b first slots 42, and at least one winding connector or at least one wire harness group 31 is crimped into each first slot 42.

[0038] Where m-1≤b≤(a×m+1).

[0039] The stator in the technical solution of the present invention includes a stator core 10, m sets of stator windings 20, 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 inside the stator yoke. A set of stator windings 20 includes at least one stator winding 20. The stator winding 20 includes a winding body and a winding connector. The winding body is wound around the stator teeth, and the winding connector is connected to the winding body. A set of stator windings 20 is provided with a winding connectors. The lead wire assembly 30 includes a plurality of wire harness groups 31. The first terminals 40 are installed on the end face of the stator core 10. A first terminal 40 is provided with b first slots 42. At least one winding connector or at least one wire harness group 31 is crimped into each first slot 42, wherein m-1≤b≤(a×m+1). Understandably, by reasonably setting the number of first slots 42 on the first terminal 40, the temperature rise at the connection point within the first slot 42 can be reduced while ensuring a safe distance between the conductive wire and the motor housing. Compared to the lead wires braided from multiple fine copper wires in existing technologies, the present invention connects the winding connector and the wire harness group 31 electrically through the first terminal 40. This allows the motor stator to use a wire harness group 31 with a larger wire diameter, ensuring reliable connection between the conductive wire and the stator winding 20. The manufacturing process of the large-diameter wire harness group 31 is simpler, thus reducing the manufacturing difficulty and cost of the lead wire assembly 30. Simultaneously, the first terminal 40 can directly crimp the large-diameter conductive wire and the stator winding 20, simplifying the connection process and enabling automated connection of the conductive wire and the stator winding 20.

[0040] Reference Figure 2Where a×m represents the total number of winding joints corresponding to a stator, and the safe 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 high. This is because multiple winding joints and / or multiple wire harness groups 31 are crimped in each first slot 42, which makes the connection point temperature of the winding joints and wire harness groups 31 in the first slot 42 high. This can easily lead to material aging and performance degradation at the connection point in the first slot 42, or even cause failure or accident. If b > (a × m + 1), it indicates that some of the first slots 42 are idle, thus reducing the utilization rate of the first terminal 40, increasing the size and material cost of the first terminal 40, which is detrimental to the miniaturization of the stator and increases the production cost of the stator. Furthermore, as the value of b gradually increases, the safe distance between the first terminal 40 and the outer peripheral wall of the stator core 10 decreases. This is because if more first slots 42 are needed on the first terminal 40, the size of the first terminal 40 needs to 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 reasonably setting m - 1 ≤ b ≤ (a × m + 1), the temperature rise at the connection point within the first slot 42 can be reduced while ensuring the 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, which are 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 multiple stator teeth are spaced circumferentially along the inner side of the stator yoke. Stator slots are defined between adjacent stator teeth, and the number of stator slots is the same as the number of stator teeth. The stator winding 20 includes a winding body, a winding connector, and a transition section. The winding body passes through the stator slots and is directly wound on the stator teeth. The winding connector is used to connect to the lead wire assembly 30 for electrical connection with an external circuit. The motor stator is fitted around the outer circumference of the motor rotor. When three-phase alternating current is applied to the stator winding 20, a rotating magnetic field is generated. The permanent magnets on the motor rotor interact with this rotating magnetic field to generate torque, thereby driving the motor to rotate and achieve normal operation of the motor.

[0042] The lead-out assembly 30 has multiple wire harness groups 31, with each first terminal 40 crimped to one wire harness group 31. The wire harness groups 31 are 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 higher. Each conductive wire has the same diameter, which can be measured using calipers or a micrometer. The portion of the conductive wire without insulation can be measured directly; for conductive wires with insulation, a small section of insulation can be removed to measure the diameter of the bare copper wire, thus obtaining the wire diameter. The specific measurement method is the same as that for 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 interconnected plate-like portions 41 arranged radially along the stator core 10, where 1 ≤ n ≤ 2. When the first terminal 40 has two of the plate-like portions 41, the two plate-like portions 41 are arranged radially along the stator core 10 on opposite sides of the insulating frame. 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, thus encroaching on the mounting space of other stator components, increasing the size of the stator, and hindering the miniaturization of the stator and motor.

[0044] Furthermore, at most two winding connectors or at most two wire harness groups 31 are crimped into each first slot 42; and / or at most one winding connector and one wire harness group 31 are crimped into each first slot 42 simultaneously. Understandably, heat will be generated at the connection points of the winding connectors and wire harness groups 31 within the first slot 42. If more than two winding connectors and two wire harness groups 31 are crimped into the first slot 42, excessive heat will be generated between the slot wall of the first slot 42 and the winding connectors and wire harness groups 31, leading to a sharp increase in the temperature of the connection points within the first slot 42. This can easily cause material aging and performance degradation at the connection points within the first slot 42, and may even lead to malfunctions or accidents.

[0045] Specifically, the distance between two adjacent first terminals 40 is s, where s ≥ 0.5 mm. If s < 0.5 mm, it indicates that the distance between two adjacent first terminals 40 is too small, which will reduce the electrical insulation performance between them. During motor operation, due to changes in current and voltage, as well as potential electromagnetic interference, a small distance 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 distance between two adjacent first terminals 40 is too small, the heat dissipation space between them will be limited, making it difficult for heat to dissipate effectively. This may cause the temperature of the first terminals 40 and surrounding electrical components to rise, thus affecting the overall performance and lifespan of the motor. Finally, when the distance between two adjacent first terminals 40 is too small, difficulties may arise in subsequent maintenance work. When replacing or repairing winding connectors, wire harness groups 31, or the first terminals 40 themselves, a small distance may restrict 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, and there are c stator slots, where 6 ≤ c ≤ 36. Each stator slot corresponds to a stator winding 20. If c > 36, it indicates that more stator slots are required, thus necessitating more stator windings 20 and insulation material, thereby increasing the manufacturing cost of the stator. Excessive stator slots reduce ventilation space, making heat dissipation of the windings difficult. This can lead to excessive temperature rise in the stator windings 20 after prolonged operation, potentially causing aging of the insulation material, reducing the stator's lifespan, and even causing burnout. Too many stator slots may also cause the motor to generate more vibration and noise during operation, affecting the motor's operational stability and reliability. If c < 6, it indicates that the number of stator slots is insufficient. Fewer stator slots lead to an increase in the magnetic density at the tooth tips of the stator core 10 and a larger air gap, thus reducing the motor's power factor. Simultaneously, fewer slots result in increased torque ripple, affecting the motor's operational stability. Finally, fewer slots may lead to the generation of harmonic magnetic fields, causing increased motor vibration and noise. Too few stator slots may also prevent the full utilization of the motor's magnetic circuit structure, resulting in reduced motor efficiency. Therefore, by rationally setting the number of stator slots, the stator's efficiency, heat dissipation, stability, and manufacturing costs 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 snapped to the stator core 10 through the engagement of the snap-fit ​​protrusion and the snap-fit ​​hole. The snap-fit ​​connection method is stable and reliable, and easy to install, thereby improving the installation and disassembly efficiency of the first terminal 40, improving the connection strength of the first terminal 40, and thus improving the stability and reliability of the first terminal 40.

[0048] Specifically, the first groove 42 includes an open section 421 and a main body section 422 connected to each other. The width of the open section 421 gradually increases in the direction away from the main body section 422. By providing the open section 421, it is convenient for the winding connector and / or wire harness assembly 31 to be inserted into the main body section 422 through the open section 421, thereby improving the crimping efficiency of the winding connector and wire harness assembly 31.

[0049] Reference Figure 6In one embodiment, the lead-out wire assembly 30 is a braided wire harness group 31 or an enameled wire harness group 31 wrapped with an insulating sleeve, thereby improving the insulation between the wire harness groups 31. Simultaneously, the lead-out wire assembly 30 needs to be bound to the stator using binding wires, cable ties, or heat-shrink tubing. By binding the wire harness groups 31, electromagnetic interference and signal crosstalk between the wire harnesses are reduced, improving the electrical performance of the equipment. Binding effectively prevents the wire harnesses from external physical damage, such as pulling, squeezing, and friction, thereby extending the service life of the wire harness group 31. It also improves the appearance of the stator and facilitates later maintenance.

[0050] The present invention also proposes an electric motor, which includes a stator. The specific structure of the stator is as described in the above embodiments. Since the present motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0051] The present invention also proposes a compressor, which includes a motor. The specific structure of the motor is as described in 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 about by the technical solutions of the above embodiments, which will not be described in detail here.

[0052] The present invention also proposes a refrigeration device, which includes a compressor. The specific structure of the compressor is as described in the above embodiments. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail 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. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within 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 on the inner side of the stator yoke; m sets of stator windings, each set of stator windings includes at least one stator winding, each stator winding includes a winding body and a winding connector, the winding body is wound on the stator teeth, the winding connector is connected to the winding body, and each set of stator windings is provided with a winding connectors. Lead wire assembly, including multiple wire harness groups; and Multiple first terminals are mounted on the end face of the stator core. Each first terminal has b first slots, and at least one winding connector or at least one wire harness group is crimped into each first slot. Where m-1≤b≤(a×m+1).

2. The stator as described in claim 1, characterized in that, The first terminal includes n plate-shaped portions connected in the radial direction of the stator core, where 1 ≤ n ≤ 2.

3. The stator as described in claim 1, characterized in that, Each of the first slots is crimped with up to two of the winding connectors or up to two of the wire harness groups; and / or At most one winding connector and one wire harness assembly can be crimped into each of the first slots simultaneously.

4. The stator as described in claim 1, characterized in that, The distance between two adjacent first terminals is s, where s ≥ 0.5 mm.

5. The stator as described in claim 1, characterized in that, A stator slot is formed between the stator yoke and two adjacent stator teeth, and there are c stator slots, where 6≤c≤36.

6. The stator as described in claim 1, characterized in that, The first terminal is provided with a snap-fit ​​hole, and the stator core is provided with a snap-fit ​​protrusion. The first terminal is connected to the stator core by the snap-fit ​​protrusion and the snap-fit ​​hole.

7. The stator as described in claim 1, characterized in that, The first groove includes an open section and a main body section connected to each other, and the width of the open section is gradually increased in the direction away from the main body section.

8. An electric motor, characterized in that, Includes the stator as described in any one of claims 1 to 7.

9. A compressor, characterized in that, Includes the motor as described in claim 8.

10. A refrigeration device, characterized in that, Includes the compressor as described in claim 9.

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