Stator assembly, method for manufacturing stator assembly and compressor

Abstract

The invention provides a stator assembly, a manufacturing method of the stator assembly and a compressor, and the stator assembly comprises a stator yoke part which is annular; the stator core is provided with a plurality of stator tooth blocks which are arranged at intervals along the circumferential direction of the stator yoke part, the tooth tip of each stator tooth block faces the center of the stator, and the tooth root is connected to the stator yoke part; the insulating bracket comprises a first bracket and a second bracket which are oppositely arranged along the axial direction of the stator yoke part and are spliced with each other, the periphery of each stator tooth block is surrounded and wrapped by the first bracket winding part, the first side wall and the second bracket winding part of the first bracket, and a winding groove for accommodating a winding is respectively defined between the adjacent stator tooth blocks; and the outer insulation part comprises an insulation ring and a plurality of insulation insertion plates which are arranged at intervals in the circumferential direction of the insulation ring, the outer insulation part is inserted into the stator yoke part and clamped, and the insulation insertion plates are inserted between the winding and the inner circumferential wall of the stator yoke part so as to realize insulation isolation. According to the invention, paint damage and wire breaking risks in the winding process can be reduced, and the performance of the whole machine is improved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment, and more specifically, to stator assemblies, methods for manufacturing stator assemblies, and compressors. Background Technology

[0002] Electric motors, especially concentrated winding motors, are widely used in household appliances, industrial drives, and other fields. In the design and manufacture of motors, the insulation support is a key component that ensures reliable insulation between the windings and the stator core. Its structural design directly affects the winding process quality, electromagnetic performance, and long-term operational reliability of the motor.

[0003] Currently, the common method for installing insulating supports involves creating mounting holes in the yoke or teeth of the stator core, and then inserting the clips or protrusions of the insulating support into these holes for fixation. For example, prior art document D1 (CN113224869A) discloses a stator assembly of a DC motor with a separate tooth and yoke, which includes a stator yoke, stator tooth blocks, and separate first and second insulating frames. The insulating frames have winding slots, and the stator tooth blocks are inserted into slots between the winding slots. The insulating frames are positioned and fixed by inserting the outer inserts on the stator tooth blocks into the mounting slots of the stator yoke. Although D1 achieves separate winding and outer winding, the fixation of its insulating frames to the core still relies on machining mounting slots on the core (stator yoke), which is essentially still a "core opening and insertion" fixing mode. This practice of creating mounting holes or slots on the magnetically conductive stator core disrupts the continuity of the core's magnetic circuit, leading to localized magnetic circuit distortion and uneven magnetic flux density. This increases core losses (iron losses), generates additional harmonics, and ultimately negatively impacts the motor's efficiency, torque fluctuations, and noise and vibration performance.

[0004] Furthermore, in the winding process of motor manufacturing, the winding section of existing insulating supports (i.e., the area in direct contact with the enameled wire and guiding its arrangement) is typically designed as a flat surface or a flat surface with a small chamfer. During high-speed automatic winding, the enameled wire, especially the lead wire extending from the winding slot, is subjected to severe compression and friction from the inner wall of the insulating support. Due to the large tension changes at the beginning and end of the winding, and the need for the lead wire to bend and turn, this compression and friction is particularly severe at the lead wire position, easily leading to damage to the insulating varnish film on the surface of the enameled wire (varnish scratches), and even wire breakage. Varnish scratches reduce the inter-turn insulation strength of the winding, becoming a safety hazard during long-term motor operation; wire breakage directly leads to product scrapping. Prior art document D2 (CN119853339A) addresses the issues of enameled wire slippage and varnish scratches during the winding process, proposing to install an anti-slip platform with anti-slip grooves on the winding frame of the insulating support, with the top surface of the anti-slip platform at an angle to the horizontal direction. D2 stabilizes the enameled wire arrangement by increasing friction through anti-slip grooves and attempts to improve the stress on the enameled wire through its inclined top surface. However, the anti-slip platform of D2 is essentially still an inclined plane or near-plane, offering limited improvement to the concentrated compression and bending stress experienced by the lead wire at the corner of the winding groove end. Its anti-slip grooves are a local feature, mainly addressing the slippage problem during the arrangement process, but do not fundamentally change the way the winding area wraps and guides the enameled wire (especially the lead wire).

[0005] Meanwhile, in order to isolate the windings within the slots from the stator core slot walls, slot insulation paper is usually inserted before or after winding. Traditional slot insulation is pieced together, and the insertion process is cumbersome. Furthermore, in designs with many turns and high slot fill factor, the slot insulation paper may wrinkle or shift due to winding compression, affecting insulation performance and space utilization.

[0006] In view of this, the present invention provides a stator assembly, a method for manufacturing the stator assembly, and a compressor. Summary of the Invention

[0007] To address the problems in the prior art, the present invention aims to provide a stator assembly, a method for manufacturing the stator assembly, and a compressor, overcoming the difficulties of the prior art. It enables reliable fixing of the insulation support without damaging the integrity of the stator core magnetic circuit, reduces the risk of paint damage and wire breakage during winding, simplifies the insulation structure, and improves the overall performance and reliability of the motor.

[0008] Embodiments of the present invention provide a stator assembly, comprising: The stator yoke is ring-shaped. The stator core has multiple stator tooth blocks, which are spaced apart circumferentially along the stator yoke. The tooth tip of each stator tooth block faces the stator center, and the tooth root is connected to the stator yoke. The stator tooth blocks and the stator yoke together define multiple stator slots. An insulating support includes a first support and a second support that are arranged opposite to each other and spliced ​​together along the axial direction of the stator yoke. The outer periphery of each stator tooth block is surrounded and wrapped by the first support winding portion, the first sidewall, and the second support winding portion of the first support, and winding slots for accommodating windings are defined between adjacent stator tooth blocks. The outer insulation portion includes an insulating ring and a plurality of insulating inserts spaced apart circumferentially along the insulating ring. The outer insulation portion is inserted into and engaged with the stator yoke portion. The insulating inserts are inserted between the winding and the inner peripheral wall of the stator yoke portion to achieve insulation isolation.

[0009] Preferably, the first bracket includes a first annular bracket body. The outer periphery of the upper end of the first annular bracket body is provided with a plurality of first bracket winding portions covering the upper end surface of the stator tooth block. The first bracket winding portions extend axially downward along both sides to form first sidewalls. Between adjacent first bracket winding portions, the first annular bracket body extends downward to form second sidewalls. The second bracket includes a second annular bracket body, and the outer periphery of the second annular bracket body is provided with a plurality of second bracket winding portions covering the lower end face of the stator tooth block. The radial outer circumferential surface of each stator tooth block is surrounded by the first bracket winding portion, the first sidewall, and the second bracket winding portion. The second sidewall is disposed on the radial inner side of the winding groove to isolate the winding from the teeth of the stator tooth block.

[0010] Preferably, the second annular bracket body is provided with a plurality of semi-frame-shaped snap-fit ​​grooves, the semi-frame-shaped snap-fit ​​grooves being used for the second side wall of the first bracket and the portion of the first side wall adjacent to the second side wall to be inserted.

[0011] Preferably, a pair of bracket locking blocks are provided on the second annular bracket body between adjacent second bracket winding portions; A first locking groove is formed between the bracket locking block and the radial inner circumferential surface of the second annular bracket body, and a second locking groove is formed between the bracket locking block and the adjacent second bracket winding portion. The second locking grooves are respectively connected to the two ends of the first locking groove along the circumferential direction, thereby jointly forming the semi-frame locking groove.

[0012] Preferably, the first bracket winding portion, the first sidewall, the second sidewall, and the first annular bracket body of the first bracket are integrally formed; The second annular bracket body, the second bracket winding part, and the bracket snap-fit ​​block of the second bracket are integrally formed; The insulating ring, insulating insert, and bayonet of the outer insulation part are integrally formed.

[0013] Preferably, the cross-sections of the first support winding portion and the second support winding portion are both arc surfaces. The angle α between the tangent at the lowest point of the arc surface and the corresponding chord of the arc surface satisfies: 0°≤α≤45°. The arc surface is either unilateral or bilateral, and the arc height ranges from 1mm to 50mm.

[0014] Preferably, the curved surface has a double-sided curvature, with the inner curvature height being greater than or equal to 0 mm and the outer curvature height being less than or equal to 50 mm.

[0015] Preferably, the first sidewall and the second sidewall are at the same height, the height of the first sidewall is at least 3mm greater than the height of the stator yoke, and the height of the first sidewall is less than or equal to the sum of the core stack height and the thickness of the second support winding area; The sum of the axial height of the first bracket winding portion and the axial height of the first sidewall is equal to the axial height of the outer insulation portion.

[0016] Preferably, the first bracket winding portion has a first wave anti-slip area on the upper surface along the axial direction of the stator yoke portion in the area first passed through in the winding direction, and the extension width of the first wave anti-slip area in the first bracket winding portion is less than or equal to half the width of the first bracket winding portion. The second support winding portion has a second wave anti-slip area on the lower surface along the axial direction of the stator yoke portion in the area first passed in the winding direction; the extension width of the second wave anti-slip area in the second support winding portion is less than or equal to half the width of the second support winding portion.

[0017] Preferably, the stator core has multiple independent stator tooth blocks.

[0018] Preferably, the stator core is integrally formed and assembled from multiple stator tooth blocks.

[0019] Embodiments of the present invention also provide a method for manufacturing a stator assembly, for manufacturing the above-mentioned stator assembly, comprising the following steps: S110. Connect the stator tooth block to the inner circumference of the stator yoke; S120. The first bracket and the second bracket are arranged opposite to each other along the axial direction of the stator yoke and spliced ​​together to jointly wrap the radial outer circumferential surface of each stator tooth block. S130. The winding slot is wound to form a winding; S140. Insert the outer insulation portion into the stator yoke portion to insulate and isolate the outer periphery of the winding from the inner periphery of the stator yoke portion; S150, Weld the gap between the outer insulation part and the stator yoke part.

[0020] Embodiments of the present invention also provide a compressor including the stator assembly described above.

[0021] The beneficial effects of this invention are as follows: Magnetic circuit optimization and performance improvement: This invention completely eliminates the traditional installation holes or slots for fixing brackets in the stator yoke or tooth blocks. The insulating bracket is fixed by splicing the first and second brackets together and wrapping around the stator tooth blocks. The stator core (yoke and tooth blocks) maintains a complete magnetic conductive cross section, and the magnetic circuit is continuous and uniform. This effectively avoids problems such as increased local magnetic reluctance, increased magnetic flux density, increased iron loss, and increased harmonics caused by openings, thereby helping to improve motor efficiency, reduce torque fluctuations and noise vibrations, and is particularly beneficial for applications such as high-efficiency compressors.

[0022] Enhanced winding protection and reliability: A groundbreaking design incorporates arc surfaces (0°≤α≤45°) across the cross-sections of both the first and second support winding sections, conforming to a specific angle range. This arc surface structure transforms the contact between the enameled wire and the support during winding, particularly at the ends of the winding groove and the lead-out turning area, from traditional "line contact" or "small-area contact" to a smoother, more closely fitting "surface contact" or "large-curvature contact." This significantly disperses contact pressure, reduces stress concentration, and particularly alleviates the squeezing and scratching experienced by the lead-out wire. Combined with optional wavy anti-slip zones, necessary friction and anti-slip measures are provided while avoiding sharp edges, fundamentally reducing the risk of enameled wire damage and breakage, and improving winding quality and long-term motor reliability.

[0023] Simplified and integrated insulation structure: By introducing a one-piece molded outer insulation section, the traditional segmented slot insulation paper function is integrated. The insulation plates of the outer insulation section are directly inserted between the winding and the inner wall of the stator yoke, while the insulation ring connects each plate and provides overall support. This design eliminates the cumbersome segmented paper insertion process, improving assembly efficiency. Simultaneously, the one-piece structure, inserted after winding, ensures accurate positioning, reduces the likelihood of wrinkles or displacement, guarantees insulation uniformity and reliability, and also facilitates full utilization of the slot space.

[0024] Stable structure and convenient assembly: The first and second brackets are axially spliced ​​and secured using structures such as semi-frame snap-fit ​​grooves, ensuring reliable connection without the need for additional fasteners. The outer insulation is fixed to the stator yoke via snap-fit ​​and final welding, resulting in a stable structure. The entire assembly process is clear, easily facilitating automated production and improving production efficiency and product consistency.

[0025] The stator assembly, the method for manufacturing the stator assembly, and the compressor of the present invention can reliably fix the insulation support without damaging the integrity of the stator core magnetic circuit, and significantly improve the stress environment of the enameled wire, especially the lead wire, during the winding process, reduce the risk of paint damage and wire breakage, while simplifying the insulation structure and improving the overall performance and reliability of the motor. Attached Figure Description

[0026] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0027] Figure 1 This is an exploded view of the stator assembly of the present invention.

[0028] Figure 2 This is a top view of the stator yoke in the stator assembly of the present invention.

[0029] Figure 3 This is a side view of the stator yoke in the stator assembly of the present invention.

[0030] Figure 4 This is a schematic diagram of the first support in the stator assembly of the present invention.

[0031] Figure 5 for Figure 4 Sectional view along the AA direction.

[0032] Figure 6 for Figure 4 A magnified view of region C in the middle.

[0033] Figure 7 for Figure 6 Sectional view along the DD direction.

[0034] Figure 8 This is a perspective view of the outer insulation portion in the stator assembly of the present invention.

[0035] Figure 9 This is a side view of the outer insulation portion in the stator assembly of the present invention.

[0036] Figure 10 This is a perspective view of the second support in the stator assembly of the present invention.

[0037] Figure 11 This is a top view of the second support in the stator assembly of the present invention.

[0038] Figure 12 for Figure 11 A magnified view of region E in the middle.

[0039] Figure 13 for Figure 11 A schematic diagram showing the interaction between the middle E region and the first support.

[0040] Figure 14 This is a bottom view of the second support in the stator assembly of the present invention.

[0041] Figure 15 This is a schematic diagram of the assembly process of the stator assembly of the present invention.

[0042] Figure Labels Detailed Implementation

[0043] The following specific examples illustrate the implementation methods of this application. Those skilled in the art can easily understand the other advantages and effects of this application from the content disclosed herein. This application can also be implemented or applied through other different specific embodiments, and various details in this application can be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0044] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0045] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0046] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] For the purpose of clearly describing this application, devices that are not relevant to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0048] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0049] When we say that a device is "above" another device, this can mean that it is directly above the other device, or it can mean that other devices are present in between. Conversely, when we say that a device is "directly" "above" another device, there are no other devices present in between.

[0050] Although the terms first, second, etc., are used in some instances herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0051] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this application. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in the specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0052] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the content of this present application, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0053] Figure 1This is an exploded view of the stator assembly of the present invention. Figure 2 This is a top view of the stator yoke in the stator assembly of the present invention. Figure 3 This is a side view of the stator yoke in the stator assembly of the present invention. Figure 8 This is a perspective view of the outer insulation portion in the stator assembly of the present invention. Figure 9 This is a side view of the outer insulation portion in the stator assembly of the present invention. Figure 1 , 2 As shown in Figures 3, 8, and 9, a stator assembly of the present invention includes: a stator yoke 100, a stator core having a plurality of stator tooth blocks 200, an insulating support, and an outer insulating portion 400. The stator yoke 100 is annular. The stator tooth blocks 200 are spaced apart circumferentially along the stator yoke 100, with the tooth tip of each stator tooth block 200 facing the stator center and the tooth root connected to the stator yoke 100. The stator tooth blocks 200 and the stator yoke 100 together define a plurality of stator slots. The insulating support includes a first support 310 and a second support 320 arranged axially opposite to and spliced ​​together along the stator yoke 100. The outer periphery of each stator tooth block 200 is surrounded and wrapped by a first support winding portion 311, a first sidewall 312, and a second support winding portion 322 of the first support 310, and winding slots for accommodating windings are defined between adjacent stator tooth blocks 200. The outer insulation portion 400 includes an insulating ring 401 and multiple insulating inserts 402 spaced circumferentially along the insulating ring 401. The outer insulation portion 400 is inserted into and engaged with the stator yoke portion 100. The insulating inserts 402 are inserted between the winding and the inner peripheral wall of the stator yoke portion 100 to achieve insulation isolation. The basic structure of this invention, through the combination of the stator yoke portion, tooth blocks, split insulating supports, and an integrated outer insulation portion, constructs a complete and functionally distinct stator assembly. Its core effect lies in achieving centralized, orderly accommodation and reliable insulation of the winding. The split insulating supports facilitate installation and encapsulation of the tooth blocks, while the introduction of the integrated outer insulation portion replaces the traditional segmented slot insulation, simplifies the insulation structure, improves assembly efficiency and insulation reliability, and lays the foundation for subsequent magnetic circuit optimization and winding protection.

[0054] Figure 4 This is a schematic diagram of the first support in the stator assembly of the present invention. Figure 5 for Figure 4 Sectional view along the AA direction. Figure 6 for Figure 4 A magnified view of region C in the middle. Figure 7 for Figure 6 A sectional view along the DD direction. (e.g.) Figures 4 to 7As shown, in a preferred embodiment, the first support 310 includes a first annular support body 315. The outer periphery of the upper axial end of the first annular support body 315 is provided with a plurality of first support winding portions 311 covering the upper end face of the stator tooth block 200. First sidewalls 312 extend axially downwards along both sides of the first support winding portions 311. Between adjacent first support winding portions 311, the first annular support body 315 extends downwards to form second sidewalls 314. The second support 320 includes a second annular support body 321. The outer periphery of the second annular support body 321 is provided with a plurality of second support winding portions 322 covering the lower end face of the stator tooth block 200. The radially outer peripheral surface of each stator tooth block 200 is surrounded by the first support winding portion 311, the first sidewall 312, and the second support winding portion 322. The second sidewall 314 is disposed radially inside the winding groove to isolate the winding from the teeth of the stator tooth block 200, but is not limited thereto. The detailed structural design of the first and second supports, especially the second sidewall of the first support, achieves complete insulation coverage of the radial inner circumference of the stator tooth block, effectively isolating the winding from the tooth and preventing inter-turn or ground short circuits. This method of upper and lower support cooperation and wrapping eliminates the need for holes in the stator yoke when installing the insulation support, fundamentally avoiding magnetic circuit distortion and performance degradation caused by holes, while ensuring the continuity and integrity of the insulation.

[0055] Figure 10 This is a perspective view of the second support in the stator assembly of the present invention. Figure 11 This is a top view of the second support in the stator assembly of the present invention. Figure 12 for Figure 11 A magnified view of region E in the middle. Figure 13 for Figure 11 A schematic diagram showing the interaction between the middle E region and the first support. Figure 14 This is a bottom view of the second support in the stator assembly of the present invention. Figures 10 to 14 As shown (to clearly illustrate the cooperation relationship, in...) Figure 13 (The positions of the first bracket winding portion 311 and the first sidewall 312 of the first bracket 310 are indicated only by dashed lines). In a preferred embodiment, the second annular bracket body 321 is provided with multiple semi-frame-shaped snap-fit ​​slots. These slots allow the second sidewall 314 of the first bracket 310 and the portion of the first sidewall 312 adjacent to the second sidewall 314 to be inserted into them, but this is not a limitation. The specific semi-frame-shaped snap-fit ​​slot structure on the second bracket provides a mechanical interface for the rapid, accurate positioning and reliable connection of the first and second brackets. This plug-in fixing method replaces the traditional method of fixing by drilling holes in the iron core, simplifying the assembly process and facilitating automation. More importantly, it completely eliminates the fixing holes on the iron core, maintaining the integrity and continuity of the iron core's magnetic circuit, thereby optimizing the motor's magnetic circuit and reducing iron loss and electromagnetic noise.

[0056] In a preferred embodiment, a pair of bracket locking blocks 325 are provided on the second annular bracket body 321 between adjacent second bracket winding portions 322. A first locking groove 324 is formed between the bracket locking block 325 and the radial inner circumferential surface of the second annular bracket body 321, and a second locking groove 326 is formed between the bracket locking block 325 and the adjacent second bracket winding portion 322. The second locking groove 326 connects to both ends of the first locking groove 324 along the circumferential direction, thereby jointly forming a semi-frame locking groove, but not limited thereto. The present invention forms a stable semi-enclosed locking structure through the ingenious arrangement of the bracket locking blocks, the first locking groove, and the second locking groove. This structure provides circumferential and radial restraint to the second sidewall and part of the first sidewall of the first bracket, preventing axial movement and circumferential rotation of the bracket due to vibration or thermal stress during motor operation, and ensuring the structural stability and long-term operational reliability of the insulating bracket assembly.

[0057] In a preferred embodiment, the first bracket winding portion 311, the first sidewall 312, the second sidewall 314, and the first annular bracket body 315 of the first bracket are integrally formed, but this is not a limitation.

[0058] In a preferred embodiment, the second annular bracket body 321, the second bracket winding portion 322, and the bracket snap-fit ​​block 325 of the second bracket 320 are integrally formed, but this is not a limitation.

[0059] In a preferred embodiment, the insulating ring 401, insulating insert 402, and bayonet 403 of the outer insulation portion 400 are integrally formed, but this is not a limitation. Manufacturing each component using an integral forming (such as injection molding) process offers several advantages. First, it ensures the strength, dimensional accuracy, and consistency of the component's structure, reducing cumulative errors and potential weaknesses caused by assembling multiple parts. Second, integral forming avoids seams or connection points, improving the reliability of insulation performance. Finally, it simplifies the production process, reduces parts management and assembly costs, and facilitates mass production.

[0060] In a preferred embodiment, the cross-sections of the first support winding portion 311 and the second support winding portion 322 are both arc surfaces. The angle α between the tangent at the lowest point of the arc surface and the corresponding chord of the arc surface satisfies: 0°≤α≤45°. The arc surface can be unilateral or bilateral, and the arc height ranges from 1mm to 50mm, but is not limited thereto. Designing the cross-section of the winding portion as an arc surface satisfying a specific angle range is one of the key innovations of this invention. This arc surface structure provides a smooth and continuous support surface for the bending and transition of the enameled wire (especially the lead wire). Compared with traditional right-angled or small-rounded planes, the arc surface significantly increases the contact area, disperses the contact pressure, and greatly alleviates stress concentration. This effectively reduces the risk of scratches (paint damage) or even breakage of the enameled wire insulation film during winding, particularly improving the reliability of the lead wire position, and enhancing winding quality and motor life.

[0061] In a preferred embodiment, the first sidewall 312 and the second sidewall 314 are of equal height, and the height H2 of the first sidewall 312 is at least 3 mm greater than the height H3 of the stator yoke 100. The sum of the axial height H1 of the first support winding portion 311 and the axial height H2 of the first sidewall 312 is equal to, but not limited to, the axial height of the outer insulation portion 400. This dimensional relationship has significant engineering implications. The height H2 of the first sidewall 312 is at least 3 mm greater than the stator height H3, and the height H2 of the first sidewall 312 is less than or equal to the sum of the core stack height and the thickness of the winding area of ​​the second support 320, providing sufficient insulation creepage distance and safety margin, ensuring reliable electrical insulation between the winding end and the core end face, meeting or even exceeding relevant safety regulations. At the same time, the total height (H1+H2) of the first support is equal to the height of the outer insulation portion, so that the components are axially aligned neatly after assembly, the structure is compact, and the outer insulation portion can completely cover and protect the winding end, forming a complete axial insulation barrier.

[0062] In a preferred embodiment, the first support winding portion 311 has a first wavy anti-slip region 313 on its upper surface along the axial direction of the stator yoke portion 100, in the area first traversed in the winding direction. The extension width of the first wavy anti-slip region 313 of the first support winding portion 311 is less than or equal to half the width of the first support winding portion 311, but is not limited thereto. Providing the first wavy anti-slip region at the beginning of winding effectively increases the friction between the region and the enameled wire, preventing slippage or displacement of the enameled wire in the initial winding stage, ensuring accurate positioning and tight arrangement of the first turn of the winding. Limiting its width to less than half the width of the winding portion strikes a balance between ensuring the anti-slip effect and avoiding excessive weakening of the winding portion's structural strength, thus ensuring the overall mechanical reliability of the support.

[0063] In a preferred embodiment, the second support winding portion 322 has a second wavy anti-slip region 323 on its lower surface along the axial direction of the stator yoke 100, in the area first traversed in the winding direction. The extension width of the second wavy anti-slip region 323 of the second support winding portion 322 is less than or equal to half the width of the second support winding portion 322, but is not limited thereto. The second wavy anti-slip region is provided at the corresponding position of the second support winding portion, and its function is similar to that of the first wavy anti-slip region, providing initial positioning and anti-slip function for winding starting from below or another direction. The anti-slip regions provided on both the upper and lower supports ensure that the enameled wire can be stably started and arranged throughout the entire winding process (regardless of the winding direction or starting point), further improving the regularity of the winding and the process stability.

[0064] In a preferred embodiment, the stator core has a plurality of independent stator tooth blocks 200, but is not limited thereto.

[0065] In a preferred embodiment, the stator core is integrally formed from a plurality of stator tooth blocks 200, but this is not a limitation.

[0066] The present invention also provides a method for manufacturing a stator assembly, for manufacturing the above-mentioned stator assembly, comprising the following steps: S110. Connect the stator tooth block 200 to the inner circumference of the stator yoke 100. This step completes the basic assembly of the stator core, providing a precise mechanical reference for subsequent insulation and winding processes.

[0067] S120. The first bracket 310 and the second bracket 320 are arranged opposite each other along the axial direction of the stator yoke 100 and spliced ​​together to jointly wrap the radial outer circumferential surface of each stator tooth block 200. This step quickly completes the assembly and fixation of the insulating bracket through a simple axial insertion method. Its core effect is that it eliminates the need to machine fixing holes on the iron core, maintains the integrity of the iron core, and the assembly process is simple, reliable, and easy to automate.

[0068] S130. Winding is performed in the winding slot to form a winding assembly. The winding is carried out in the winding slot formed by the pre-assembled insulating support. Thanks to the curved surface design of the winding section, this step significantly reduces the damage rate of the enameled wire, especially the lead wire, and improves winding quality and efficiency.

[0069] S140. Insert the outer insulation part 400 into the stator yoke part 100 to insulate and isolate the outer periphery of the winding from the inner periphery of the stator yoke part 100. This step utilizes the integrated outer insulation part to complete the slot insulation insertion of all stator slots in one go. Compared with the traditional piecewise paper insertion process, this greatly improves assembly efficiency and the consistency of the insulation component position, ensuring the reliability of the insulation.

[0070] S150, weld the gap between the outer insulation part 400 and the stator yoke part 100. Finally, fix the outer insulation part to the stator yoke part by welding (such as ultrasonic welding). This step not only achieves a firm mechanical fixation to prevent the parts from loosening, but the sealed connection formed by welding also enhances the overall structure and may also help with moisture and dust protection, improving the reliability of the motor in harsh environments.

[0071] The specific embodiments of the present invention are as follows: This invention provides a stator assembly, primarily used in concentrated winding motors, and particularly suitable for compressor motors with high requirements for efficiency, reliability, and noise / vibration control. Figure 1 The exploded view shown shows that the stator assembly mainly consists of a stator core (including a stator yoke 100 and a stator tooth block 200), an insulation part (including a first support 310, a second support 320 and an outer insulation part 400), and a winding subsequently wound on it (not shown in the figure).

[0072] First, let's introduce the stator core. For example... Figure 2 and Figure 3 As shown, the stator yoke 100 is an annular laminated silicon steel sheet, forming the outer ring of the magnetic circuit of the motor stator. Multiple snap-fit ​​structures, such as snap-fit ​​grooves 102, are evenly spaced along the inner circumference of the stator yoke 100 for connecting stator tooth blocks 200. The stator tooth blocks 200 are also made of laminated silicon steel sheets, and their shape is approximately "T"-shaped or similar, including a tooth tip portion near the center and a tooth root portion connecting to the stator yoke 100. The tooth root portion of each stator tooth block 200 is fixedly connected to the snap-fit ​​groove 102 or other connection position on the inner circumference of the stator yoke 100 by welding, riveting, interference fit, or other suitable methods. The tooth tips of all stator tooth blocks 200 face the stator center, and the tooth roots connect to the stator yoke 100. The stator tooth blocks 200 and the stator yoke 100, as well as adjacent stator tooth blocks 200, together form multiple radially open stator slots (or tooth grooves) 101. These stator slots 101 are spaces for subsequently accommodating the winding coils. It is particularly important to emphasize that in this invention, the stator yoke 100 and stator tooth blocks 200 do not have through-holes or deep grooves specifically for fixing the insulating support. The snap-fit ​​grooves 102 or other connecting structures on the stator yoke 100 primarily function to connect the stator tooth blocks 200, not to fix the insulating support. This ensures maximum integrity of the core magnetic circuit.

[0073] Secondly, we will introduce in detail one of the core innovations of this invention—the insulating support. The insulating support adopts a split design, including a section along the stator axial direction (i.e., Figure 1The first support 310 and the second support 320 are arranged opposite each other in the vertical direction. The first support 310 and the second support 320 are preferably integrally injection molded from engineering plastics (such as PBT, PA66+GF, etc.) with good electrical insulation properties and mechanical strength.

[0074] like Figures 4 to 7 As shown, the first bracket 310 is generally annular, including a first annular bracket body 315. On the radial outer periphery of the first annular bracket body 315, a plurality of first bracket winding portions 311 are protruded at equal intervals along the circumferential direction. The number of first bracket winding portions 311 is the same as the number of stator tooth blocks 200, and each first bracket winding portion 311 covers and corresponds to the upper end face of one stator tooth block 200 (i.e., Figure 1 The upper surface of the first bracket winding portion 311. First sidewalls 312 extend axially (downward) from both sides of each first bracket winding portion 311. The two first sidewalls 312, together with the arcuate lower surface of the first bracket winding portion 311 (described in detail later), form half of an approximately "U"-shaped, open-ended, downward-facing wrapping structure. Between two adjacent first bracket winding portions 311, the radially inner portion of the first annular bracket body 315 extends downward to form a second sidewall 314. The second sidewall 314 is located at the radially innermost edge of the subsequently formed winding groove.

[0075] like Figures 10 to 14 As shown, the second bracket 320 is also annular, including a second annular bracket body 321. On the radial outer periphery of the second annular bracket body 321, a plurality of second bracket winding portions 322 are protruded at equal intervals along the circumferential direction. The number of second bracket winding portions 322 is also consistent with that of the stator tooth block 200, and each second bracket winding portion 322 is used to cover and correspond to the lower end face of a stator tooth block 200 (i.e., Figure 1 (The lower surface of the second bracket winding section 322). The upper surface of the second bracket winding section 322 is also designed as a specific curved surface.

[0076] The assembly method of the insulating bracket is as follows: Figure 13 and Figure 15 As shown. During assembly, the second bracket 320 is first placed under the stator yoke 100 with the stator tooth block 200 already installed, so that the winding portion 322 of each second bracket fits against the lower end face of the corresponding stator tooth block 200. Then, the first bracket 310 is aligned and lowered from above. At this time, the first bracket winding portion 311 of the first bracket 310 covers the upper end face of the stator tooth block 200, while the first sidewalls 312 on both sides and the second sidewall 314 in the middle extend downwards. The key is the snap-fit ​​structure provided on the second bracket 320. Figure 10 , Figure 12As shown in the figure, on the second annular bracket body 321, between two adjacent second bracket wire winding parts 322, a pair of protruding bracket clamping blocks 325 are provided. Between this pair of bracket clamping blocks 325 and the radially inner peripheral surface of the second annular bracket body 321, a first clamping groove 324 extending radially is formed. At the same time, between each bracket clamping block 325 and the side of its adjacent second bracket wire winding part 322, a second clamping groove 326 extending circumferentially is formed. The two second clamping grooves 326 are respectively connected to the two circumferential ends of the first clamping groove 324, thereby forming a semi-frame-shaped clamping groove similar to a "匚" shape on the second bracket 320.

[0077] When the first bracket 310 is lowered, its second side wall 314 located between adjacent first bracket wire winding parts 311 and two small sections of the first side wall 312 adjacent to the second side wall 314 are exactly inserted into this semi-frame-shaped clamping groove of the second bracket 320. Specifically, the second side wall 314 is inserted into the first clamping groove 324, and the two adjacent first side walls 312 are respectively inserted into the two second clamping grooves 326. Through this plug-in fit, the first bracket 310 and the second bracket 320 are reliably positioned and fixed together axially without opening holes on the iron core for fixing. After the two are spliced, the first bracket wire winding part 311, the first side wall 312 and the second bracket wire winding part 322 together form a complete insulating cavity that surrounds and wraps the radially outer peripheral surface (mainly the tooth body part) of each stator tooth block 200. The space between adjacent stator tooth blocks 200 is surrounded by structures such as the first side wall 312, the second side wall 314 of the first bracket 310, the second bracket wire winding part 322 and the bracket clamping block 325 of the second bracket 320 to form a wire winding groove for winding.

[0078] Another core innovation point of the present invention lies in the arc surface design of the wire winding part. As Figures 5 to 7As shown, the cross-section (i.e., the cross-section perpendicular to the direction of the winding conductor) of the first support winding section 311 is designed as an arc surface. Similarly, the cross-section of the second support winding section 322 is also designed as an arc surface. Here, "arc surface" does not refer to the entire three-dimensional curved surface, but rather to the arc-shaped profile of the cross-section at the key contact point (i.e., the area guiding the contact with the enameled wire). The shape of this arc surface needs to meet specific conditions: the angle between a tangent line drawn through the lowest point (i.e., the most concave point) and the corresponding chord (the straight line connecting the two ends of the arc surface) is defined as α. This invention requires that the angle α satisfy: 0° ≤ α ≤ 45°. When α = 0°, the tangent line at the lowest point of the arc surface is horizontal, corresponding to a relatively gentle symmetrical arc. When α > 0°, the arc surface is asymmetrical, with one side being steeper. Limiting the angle α to within 45° ensures that the arc surface has a sufficiently gentle transition area, avoiding the formation of excessively steep or sharp corners. The curved surface can be unilateral (e.g., only one side is curved, while the other side has a gentle transition) or bilateral (the central area is curved). Furthermore, the arc height (i.e., the maximum vertical distance from the apex of the arc to the chord) can be designed according to actual needs, typically ranging from 1mm to 50mm. This curved surface design is crucial. During winding, the enameled wire, especially the "lead wire" drawn from the winding groove, needs to bend and turn along the surface of the winding section. Traditional right-angled or slightly rounded planes will generate concentrated compressive and shear forces on the enameled wire at the turning point. The curved surface design of this invention provides a continuous, smooth, and gradually curvature-changing support surface for the bending of the enameled wire. The contact between the enameled wire and the curved surface occurs along a curve, increasing the contact area, decreasing the pressure, and transforming the stress state from concentrated bending stress to more dispersed contact pressure. Similarly, when the enameled wire bends on the curved surface, the scratch and compressive damage to its insulating enamel film is greatly reduced, effectively solving the industry problem of easy paint damage and breakage of the lead wire.

[0079] To further enhance the positioning and anti-slip effect of the enameled wire in the initial stage of winding, an anti-slip structure can be set at the starting position of winding. For example... Figure 4 and Figure 6 As shown, on the upper surface (winding contact surface) of the first support winding portion 311, in the area first traversed in the winding direction (e.g., in the left starting area if the winding is clockwise), a first wavy anti-slip area 313 can be molded. This area has a regular wavy textured surface, which increases the static friction with the enameled wire and prevents the enameled wire from slipping during winding. Similarly, at a corresponding position on the lower surface of the second support winding portion 322, a second wavy anti-slip area 323 can be provided (see... Figure 10 , Figure 14To prevent excessive weakening of structural strength, the extension width of the wavy anti-slip region (along the width direction of the winding portion) should be controlled within half of the width W of the winding portion. For example, the length L of the first wavy anti-slip region 313 should be ≤ W / 2. The wavy texture is more favorable to enameled wire than sharp grooves.

[0080] Next, the outer insulating portion 400 of the present invention will be described. For example... Figure 8 and Figure 9 As shown, the outer insulation part 400 is an independent insulation component, preferably molded from insulating paperboard (such as fish-scale paper, DMD, etc.) or injection molded from plastic. It includes a circular insulating ring 401. Multiple insulating inserts 402 extend radially outward at equal intervals along the outer circumference of the insulating ring 401. The number of insulating inserts 402 corresponds to the number of stator slots. Multiple inwardly protruding latches 403 may also be provided on the inner circumference of the insulating ring 401 for engaging with corresponding structures (such as grooves) on the stator yoke 100 to achieve pre-fixation. The thickness and shape of the insulating inserts 402 are designed so that they can be precisely inserted between the inner circumferential wall of the stator yoke 100 and the outer surface of the pre-wound winding. Figure 1 and Figure 15 As shown, after winding is completed, the outer insulation portion 400 is inserted from one end (usually axially) of the stator assembly. Insulating plates 402 are inserted one by one into each stator slot, located between the winding and the inner slot wall of the stator yoke 100, serving as slot insulation to prevent electrical breakdown between the winding and the core. Insulating rings 401 are located at the end or inside of the stator yoke 100, connecting and supporting all insulating plates 402 to form a single unit. The height (axial dimension) of the outer insulation portion 400 is designed to be approximately equal to the sum of the height H1 of the first support winding portion 311 of the first support 310 and the height H2 of the first sidewall 312, resulting in a neat appearance and complete insulation coverage after installation.

[0081] Regarding dimensional relationships, such as Figure 3 , Figure 5 As shown, there are several key dimensions. The axial height of the first support winding section 311 is denoted as H1. The heights of the first sidewall 312 and the second sidewall 314 are equal and denoted as H2. The axial height of the stator yoke 100 (or the entire stator core lamination) is denoted as H3. To ensure sufficient insulation creepage distance and withstand voltage, the height H2 of the first sidewall must be at least 3mm greater than the height H3 of the stator yoke, i.e., H2 ≥ (H3 + 3mm). In this way, even if the winding experiences a certain amplitude of vibration or expansion within the slot, the sidewall can still provide a reliable insulation barrier to prevent the winding from contacting the end face of the core. The axial height of the outer insulation section 400 is designed to be equal to (H1 + H2), ensuring that its insulation protection range covers the entire area from the upper surface of the first support winding section to the lower end face of the first support.

[0082] Figure 15 This is a schematic diagram of the assembly process of the stator assembly of the present invention. Finally, the assembly and manufacturing method of the entire stator assembly can be summarized as follows: Figure 15 Indication: S110. Core Assembly: The root parts of each stator tooth block 200 are fixedly connected to the corresponding positions on the inner circumference of the annular stator yoke 100 (such as the snap-fit ​​groove 102) by welding or other means to form a complete stator core.

[0083] S120. Insulating bracket assembly: First, mount the second bracket 320 onto the stator core from one axial side (as shown below), aligning and fitting the winding portion 322 of the second bracket to the lower end face of the stator tooth block 200. Then, align and lower the first bracket 310 from the other axial side (as shown above), ensuring that its winding portion 311 fits against the upper end face of the stator tooth block 200, and ensuring that the second sidewall 314 and adjacent first sidewall 312 of the first bracket 310 are inserted into the corresponding semi-frame-shaped snap-fit ​​groove of the second bracket 320, completing the splicing and fixing of the two. At this point, each stator tooth block is wrapped by the insulating bracket, and a winding groove is formed between adjacent tooth blocks.

[0084] S130, Winding: Using an automatic winding machine, the enameled wire is sequentially wound into each winding slot to form a concentrated winding. During winding, the enameled wire smoothly transitions along the arc surfaces of the first support winding section 311 and the second support winding section 322, and is effectively protected, especially at the lead wire position.

[0085] S140. Installing the outer insulation: Insert the outer insulation part 400 axially into the inner hole of the stator yoke part 100. Insert the insulating inserts 402 between the winding in each stator slot and the inner wall of the stator yoke part 100. The locking portion 403 on the insulating ring 401 may engage with the structure on the stator yoke part 100, achieving initial positioning. The outer insulation part 400 completely insulates and isolates the winding from the core yoke.

[0086] S150. Welding and Fixing: Finally, at the annular gap (or other connection points) where the insulating ring 401 of the outer insulation part 400 contacts the inner wall of the stator yoke part 100, a suitable welding process (such as hot melt welding, ultrasonic welding, etc., to ensure that the insulation is not damaged) is used to weld and seal the outer insulation part 400. This not only fixes the outer insulation part 400, but also enhances the overall integrity and sealing of the structure, preventing the insulation components from shifting during motor operation.

[0087] The present invention also provides a compressor including a motor, wherein the stator portion of the motor employs the stator assembly described in any of the above embodiments. Because this stator assembly has advantages such as optimized magnetic circuit, reliable winding, and integrated insulation, the compressor motor incorporating this stator assembly has higher efficiency, lower operating noise and vibration, and higher long-term operational reliability, making it particularly suitable for applications with stringent energy efficiency and reliability requirements, such as household air conditioners, refrigerators, and commercial refrigeration equipment.

[0088] In summary, the purpose of this invention is to provide a stator assembly, a method for manufacturing the stator assembly, and a compressor. Through an innovative coreless mounting hole-free insulating bracket fixing method, a unique winding section arc surface design, and an integrated external insulation section structure, it systematically solves the problems of magnetic circuit damage, winding paint damage, and cumbersome insulation processes in the prior art, and provides a high-performance, highly reliable, and easy-to-manufacture stator assembly solution.

[0089] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A stator assembly characterized by, The application relates to a stator structure of a rotating electric machine. The stator structure comprises a stator yoke (100) in a ring shape; a stator core having a plurality of stator tooth blocks (200) arranged at intervals along the circumference of the stator yoke (100), the tooth tips of each stator tooth block (200) being directed towards the center of the stator, and the tooth roots being connected to the stator yoke (100); an insulation support comprising a first support (310) and a second support (320) arranged oppositely along the axial direction of the stator yoke (100) and spliced with each other, the outer periphery of each stator tooth block (200) being wrapped by a first support wire winding portion (311), a first side wall (312) and a second support wire winding portion (322) of the first support (310), and a wire winding groove for accommodating a winding being defined between adjacent stator tooth blocks (200) respectively; and an outer insulation portion (400) comprising an insulation ring (401) and a plurality of insulation plug-in plates (402) arranged at intervals along the circumference of the insulation ring (401), the outer insulation portion (400) being inserted into and clamped with the stator yoke (100), and the insulation plug-in plates (402) being inserted between the winding and the inner peripheral wall of the stator yoke (100) to achieve insulation isolation. The first support (310) comprises a first annular support body (315), the outer periphery of the upper end of the first annular support body (315) being provided with a plurality of first support wire winding portions (311) covering the upper end faces of the stator tooth blocks (200), the first side walls (312) being formed by extending downward axially along the two sides of the first support wire winding portions (311) respectively, and the second side walls (314) being formed by extending downward of the first annular support body (315) between adjacent first support wire winding portions (311). The second support (320) comprises a second annular support body (321), the outer periphery of the second annular support body (321) being provided with a plurality of second support wire winding portions (322) covering the lower end faces of the stator tooth blocks (200). The radially outer peripheral faces of each stator tooth block (200) are surrounded by the first support wire winding portions (311), the first side walls (312) and the second support wire winding portions (322), and the second side walls (314) are arranged on the radially inner side of the wire winding groove for isolating the winding from the tooth portions of the stator tooth blocks (200).

2. The stator assembly of claim 1, wherein, A plurality of half-frame type clamping grooves are arranged on the second annular support body (321) for inserting the second side walls (314) of the first support (310) and the portions of the first side walls (312) adjacent to the second side walls (314). A pair of support clamping blocks (325) are arranged on the second annular support body (321) between adjacent second support wire winding portions (322). ​ 3. The stator assembly of claim 2, wherein, ​ 4. The stator assembly of claim 3, wherein, ​ The bracket clamping block (325) and the radial inner circumferential surface of the second annular bracket body (321) form a first clamping groove (324), and the bracket clamping block (325) and the adjacent second bracket winding part (322) form a second clamping groove (326), and the second clamping groove (326) is respectively communicated with the two ends of the first clamping groove (324) in the circumferential direction, thereby collectively surrounding the half-frame type clamping groove.

5. The stator assembly of claim 4, wherein, The first bracket winding part (311), the first side wall (312), the second side wall (314) and the first annular bracket body (315) of the first bracket are integrally formed; The second annular bracket body (321), the second bracket winding part (322) and the bracket clamping block (325) of the second bracket (320) are integrally formed; The insulating ring (401), the insulating plug (402) and the bayonet part (403) of the outer insulation part (400) are integrally formed.

6. The stator assembly of claim 1, wherein, The cross sections of the first bracket winding part (311) and the second bracket winding part (322) are arc surfaces, the tangent line at the lowest point of the arc surface and the included angle α of the chord corresponding to the arc surface satisfy 0°≤α≤45°, the arc surface is single-sided or double-sided, and the arc height of the arc surface ranges from 1mm to 50mm.

7. The stator assembly of claim 1, wherein, The first side wall (312) and the second side wall (314) are equal in height, the height (H2) of the first side wall (312) is at least 3mm greater than the height (H3) of the stator yoke (100), and the height (H2) of the first side wall (312) is less than or equal to the sum of the core stack height and the winding area thickness of the second bracket (320); The sum of the axial height (H1) of the first bracket winding part (311) and the axial height (H2) of the first side wall (312) is equal to the axial height of the outer insulation part (400).

8. The stator assembly of claim 1, wherein, The first bracket winding part (311) is provided with a first wave anti-skid area (313) at the area first passed in the winding direction along the upper surface of the stator yoke (100) in the axial direction, and the extension width of the first wave anti-skid area (313) is less than or equal to half of the width of the first bracket winding part (311); The second bracket winding part (322) is provided with a second wave anti-skid area (323) at the area first passed in the winding direction along the lower surface of the stator yoke (100) in the axial direction, and the extension width of the second wave anti-skid area (323) is less than or equal to half of the width of the second bracket winding part (322).

9. A method of manufacturing a stator assembly, characterized by, A method for manufacturing the stator assembly as claimed in claim 1, comprising the following steps: S110, connecting the stator tooth block (200) to the inner circumferential surface of the stator yoke (100); S120, arranging the first bracket (310) and the second bracket (320) in opposite directions along the axial direction of the stator yoke (100) and splicing them to each other to collectively wrap the radial outer circumferential surface of each stator tooth block (200); S130, winding the winding slot to form a winding; S140, connecting the outer insulation part (400) to the outer circumferential surface of the stator yoke (100). S140, inserting the outer insulation part (400) into the stator yoke part (100) to insulate the winding outer periphery from the inner periphery of the stator yoke part (100); S150, welding the gap between the outer insulation part (400) and the stator yoke part (100).

10. A compressor characterized by, A stator assembly comprising a stator assembly according to any one of claims 1 to 8.

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