Stator assembly, electric machine, compressor and refrigeration appliance

Abstract

The application provides a stator assembly, a motor, a compressor and a refrigeration device, relates to the technical field of motors, and at least solves the problem that insulation paper is clamped into the wire package by the enameled wire during the winding process, thereby causing poor insulation. The stator assembly comprises: a stator core, the stator core being provided with a plurality of stator slots; and insulation paper, the insulation paper being arranged in the stator slots; wherein the insulation paper is provided with a bending portion at the slot opening position of the stator slot, the bending portion is bent towards the center of the stator core, and the bending portion is located in the slot opening. The stator assembly provided by the application forms a support structure that is opened outwards at the slot opening, and the extrusion of the enameled wire on the bending portion during winding is converted into a pressing force that makes the bending portion tightly adhere to the side wall of the slot opening, thereby avoiding that the insulation paper is clamped into the wire package by the enameled wire, and effectively reducing the winding insulation failure rate.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a stator assembly, a motor, a compressor, and a refrigeration device. Background Technology

[0002] During the production of air conditioner compressor stator assemblies, insulating paper needs to be placed inside the stator slots to achieve insulation isolation between the iron core and the windings. In existing stator structures, the insulating paper is usually straight or bent inwards at the slot opening. In automated winding processes, due to the confined winding space, the high-speed reciprocating motion of the winding needle and enameled wire can easily interfere with the edge of the insulating paper at the slot opening. This causes the insulating paper to be stuck inside the coil by the enameled wire, resulting in insulation layer damage, reduced electrical distance, and poor insulation. This problem is difficult to detect in real time on highly automated production lines, and defective products can easily flow into subsequent processes, causing significant waste of production capacity and cost losses. Summary of the Invention

[0003] The present invention aims to at least solve the problem in the related art where insulating paper is stuck inside the coil by the enameled wire during the winding process, resulting in poor insulation.

[0004] The first aspect of the present invention provides a stator assembly, comprising: a stator core having a plurality of stator slots; insulating paper disposed within the stator slots; wherein the insulating paper has a bent portion at the slot opening, the bent portion being bent toward the center of the stator core, and the bent portion being located within the slot opening.

[0005] In this technical solution, the stator core has multiple axially continuous stator slots, each with a roughly U-shaped or trapezoidal cross-section, used to accommodate the enameled wire of the winding. Insulating paper, made of insulating material (such as polyester film, aramid paper, or composite material), is inserted and covers the inner wall of the stator slot (including the bottom, side, and top walls) to isolate the stator core from the enameled wire. At the slot opening, the insulating paper is pre-bent to form a folded portion. This folded portion bends towards the central axis of the stator core (i.e., radially inward), and its entirety lies within the space defined by the slot opening, not exceeding the edge of the slot opening. The folded portion can be achieved using a dedicated slot paper forming fixture. After the insulating paper is inserted into the stator slot, the fixture applies pressure from the inside to the outside of the slot opening, causing the edge of the insulating paper to fold outward and adhere to the side wall of the slot opening or maintain a certain opening angle. The presence of this bend alters the contact mechanics between the enameled wire and the insulating paper. When the winding needle drives the enameled wire in and out of the slot at high speed, the outward-opening shape of the bend forms a self-supporting structure, preventing curling or displacement even after repeated scraping. This solution, by setting a bend that bends towards the center of the stator core and is located within the slot, creates an outward-opening support structure for the insulating paper at the slot opening. During winding, the squeezing force of the enameled wire on the bend is converted into a pressing force that keeps it tightly against the side wall of the slot, thereby preventing the insulating paper from being hooked and pulled into the coil, effectively reducing the winding insulation failure rate.

[0006] In the above technical solution, optionally, the bending portion includes a first bending portion and a second bending portion, the first bending portion and the second bending portion are respectively disposed on both sides of the groove, and an opening is formed between the first bending portion and the second bending portion.

[0007] In this technical solution, the bending section is not a single-sided structure, but rather consists of two independent bending segments. These two bending segments are located on the left and right sides of the slot, bending symmetrically or asymmetrically towards the stator center. A radially through-opening is naturally formed between them. During the winding process, the enameled wire or winding needle can smoothly enter and exit the stator slot through this opening. Simultaneously, the bending segments on both sides of the opening constrain and guide the movement trajectory of the enameled wire, preventing it from deviating. By setting a first and a second bending segment on each side of the slot, forming an opening between them, a double-sided guiding structure is constructed, ensuring that the enameled wire receives uniform guidance when entering and exiting the slot.

[0008] In the above technical solution, optionally, the bending angles of the first bending portion and the second bending portion are both greater than 0° and less than or equal to 90°.

[0009] In this technical solution, a 0° angle indicates no bending, and this solution excludes 0°. When the angle is 90°, the bent portion completely conforms to the sidewall of the slot or is turned outward at a right angle. The angle range can be flexibly selected according to the movement trajectory of the winding needle and the size of the slot. For scenarios where it is desirable to retain a certain guiding slope, an intermediate angle of 30° to 60° can be selected. Precise control of the bending angle can be achieved through the mold angle of the forming tool. Within this angle range, the bent portion will not lose its avoidance effect due to an excessively small angle, nor will it cause stress concentration and breakage at the root of the insulating paper due to an excessively large angle. By limiting the bending angle between 0° and 90°, the bent portion has sufficient avoidance space without excessive bending that could damage the insulating paper, achieving a balance between manufacturability and anti-jamming performance.

[0010] In the above technical solution, optionally, the length of the first bend is L1, the length of the second bend is L2, and the groove depth along the radial direction of the stator core is L, wherein 0.8≤L1 / L≤1.5 and 0.8≤L2 / L≤1.5.

[0011] In this technical solution, lengths L1 and L2 refer to the straight-line distances measured along the surface of the insulating paper from the starting point of the first bend (i.e., the root of the bend) to the free end (the end furthest from the bend point) of the second and third bends, respectively. The slot depth L is the vertical distance along the radial direction of the slot opening from the inner surface of the stator to the bottom of the slot. This solution limits the ratio of the bend length to the slot depth to between 0.8 and 1.5. When the ratio is less than 0.8, the bend is too short and cannot effectively cover the sidewall of the slot, and the enameled wire may still contact the edge of the unbent insulating paper. When the ratio is greater than 1.5, the bend is too long, and its free end may protrude beyond the slot and extend into the stator's inner hole area, rubbing against the rotating rotor. By controlling the ratio within the range of 0.8 to 1.5, both the sufficient length of the bend to form an outwardly opening support surface and the avoidance of interference with the rotor are ensured.

[0012] In the above technical solution, optionally, the first bending portion and the second bending portion are symmetrically arranged with respect to the center line of the stator slot.

[0013] In this technical solution, the centerline of the stator slot refers to the bisector extending radially and dividing the slot opening and bottom into two halves. The first and second bends are mirror-symmetrical with respect to this centerline, meaning their bending angles, lengths, and shapes are equal. This symmetrical structure ensures that the insulating paper on both sides of the slot opening has a completely consistent shape. During winding, the lateral guiding force on the enameled wire is balanced, preventing the winding needle from swaying due to resistance on one side, thus ensuring the neatness and consistency of the winding arrangement. By symmetrically arranging the first and second bends with respect to the centerline of the stator slot, the forces on both sides of the slot opening are balanced during winding, resulting in smoother movement of the winding needle and improving the consistency of winding quality.

[0014] In the above technical solution, optionally, the bending angles of the first bending portion and the second bending portion are not equal.

[0015] In this technical solution, unlike the symmetrical structure, the bending angles of the first and second bends are set to different values. This asymmetrical design is suitable for certain winding processes, such as when the winding needle's entry and exit trajectory is biased towards one side of the slot, or when the winding direction is unidirectional (e.g., entering only from the left). In this case, the bending angle on the side facing the wire can be designed to be larger to completely avoid the obstacle, while the other side can be designed to be smaller. The asymmetrical structure can also adapt to stator cores of different specifications, such as when the side walls of the slot are asymmetrical or the winding space is limited. By adjusting the angle difference, the movement path of the winding machine can be precisely matched to achieve optimal obstacle avoidance.

[0016] In the above technical solution, optionally, the end of the bent portion away from the bending point is located inside the groove.

[0017] In this technical solution, the "end furthest from the bending point" refers to the free end of the bent portion, which is the end of the insulating paper closest to the stator center after bending. "Located within the slot" means that the free end does not extend radially beyond the outer edge of the slot (i.e., the boundary line between the slot and the stator inner hole), nor circumferentially beyond the extension lines of the two side walls of the slot. In other words, the free end is completely confined within the space enclosed by the slot and will not protrude into the stator inner hole area. This feature ensures that even if the bent portion is long, its end remains safely within the slot area, thus avoiding contact with the outer surface of the rotor core.

[0018] Optionally, in the above technical solution, the stator assembly further includes: insulating end plates, which are disposed at both ends of the stator core along the axial direction, and the insulating paper and the insulating end plates together constitute the insulating layer between the stator core and the winding.

[0019] In this technical solution, the insulating end plates are annular plate-shaped components made of insulating material (such as phenolic resin, polyester, or polyimide), respectively installed on the axial end faces of the stator core. The insulating end plates typically have slot-shaped holes corresponding to the stator slot positions, as well as wire slots or hanging posts for fixing the starting end of winding. After the insulating paper is inserted into the stator slot, its axial ends overlap or abut against the inner surface of the insulating end plates, forming a continuous, gapless insulating barrier. The insulating paper and insulating end plates together cover all surfaces of the stator core that may come into contact with the enameled wire, constituting a complete insulation system. By setting the insulating end plates and insulating paper together to form an insulating layer, a complete stator insulation system is formed, solving the problem of winding paper jams while ensuring the overall insulation reliability of the stator.

[0020] In the above technical solution, optionally, the bent part fits into the side wall of the groove.

[0021] In this technical solution, "close contact" refers to the close contact between the inner surface of the bent portion (the side facing the stator core) and the sidewall surface of the slot. This close contact can be achieved by setting the bending angle to approximately 90°, at which point the bent portion is almost parallel to and tightly adheres to the sidewall of the slot. After close contact, the bent portion is supported by the sidewall, making it less prone to swaying or springing during winding vibrations, resulting in greater positional stability. Simultaneously, the close contact also means that the bent portion is completely removed from the main movement path of the enameled wire, and the enameled wire will almost never collide with the bent portion, thus minimizing the risk of interference. By ensuring the bent portion is close to the sidewall of the slot, the insulating paper can be firmly fixed to the slot wall after bending, preventing the bent portion from swaying or shifting during winding and improving structural stability.

[0022] A second aspect of the present invention provides an electric motor, comprising: a stator assembly as described in any of the above technical solutions.

[0023] In this technical solution, the motor includes not only the aforementioned stator assembly but also conventional components such as a rotor, housing, and end caps. The rotor is rotatably disposed within the inner bore of the stator core, forming an air gap with the stator core. Because the motor of this invention includes the aforementioned stator assembly, it also possesses all the beneficial effects of the aforementioned stator assembly.

[0024] A third aspect of the present invention provides a compressor, comprising: a motor as described above.

[0025] In this technical solution, the compressor can be a scroll compressor, a rotary piston compressor, or a reciprocating piston compressor, and it internally houses the aforementioned motor. The motor drives the compressor's crankshaft or rotor to perform compression. Because the motor has higher winding insulation reliability, the long-term operational stability of the compressor is guaranteed, and the scrap rate during the production process is reduced, which helps to lower the overall cost of the machine. Since the compressor includes the aforementioned motor, it also possesses all the beneficial effects of the aforementioned stator assembly.

[0026] A fourth aspect of the present invention provides a refrigeration device, comprising: a compressor as described above; or a motor as described above.

[0027] In this technical solution, the refrigeration equipment can be an air conditioner, refrigerator, freezer, dehumidifier, or heat pump water heater, etc. The refrigeration equipment directly uses the aforementioned compressor as its core component, or directly uses the aforementioned motor as its drive source. Since the refrigeration equipment includes the aforementioned stator assembly, it also possesses all the beneficial effects of the aforementioned stator assembly. Attached Figure Description

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 One of the structural schematic diagrams of a stator assembly according to an embodiment of this application is shown;

[0030] Figure 2 A second schematic diagram of the stator assembly according to an embodiment of this application is shown;

[0031] Figure 3 It shows Figure 2 Enlarged view of the structure at point A in the middle;

[0032] Figure 4 A schematic diagram of the structure of insulating paper according to an embodiment of this application is shown;

[0033] Figure 5 An assembly structure diagram of the stator core and insulating end plate according to an embodiment of this application is shown.

[0034] 1. Stator core, 11. Stator slot, 12. Slot opening, 122. Side wall, 2. Insulating paper, 21. Bending part, 211. First bending part, 212. Second bending part, 213. Opening, 3. Insulating end plate. Detailed Implementation

[0035] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the first aspect of the present invention provides a stator assembly, including a stator core 1 and insulating paper 2. The stator core 1 has a plurality of stator slots 11. The insulating paper 2 is disposed in the stator slots 11. The insulating paper 2 has a bent portion 21 at the slot opening 12 of the stator slot 11. The bent portion 21 bends toward the center of the stator core 1 and is located in the slot opening 12.

[0038] In this technical solution, the stator core 1 has multiple axially extending stator slots 11, each with a roughly U-shaped or trapezoidal cross-section, used to accommodate the enameled wire of the winding. Insulating paper 2, made of insulating material (such as polyester film, aramid paper, or composite material), is inserted and covers the inner wall surface (including the bottom wall, side walls, and top wall) of the stator slot 11 to isolate the stator core 1 from the enameled wire. At the slot opening 12 of the stator slot 11, the insulating paper 2 is pre-bent to form a bent portion 21. This bent portion 21 is bent towards the central axis of the stator core 1 (i.e., radially inward), and its entirety is located within the space defined by the slot opening 12, not exceeding the edge of the slot opening 12. The bending portion 21 can be achieved using a dedicated slot forming fixture. After the insulating paper 2 is inserted into the stator slot 11, the fixture applies pressure from the inside to the outside of the slot opening 12, causing the edge of the insulating paper to fold outward and adhere to the side wall 122 of the slot opening 12 or maintain a certain opening angle. The presence of this bending portion 21 changes the contact mechanical relationship between the enameled wire and the insulating paper. When the winding needle drives the enameled wire to enter and exit the slot opening 12 at high speed, the outward opening shape of the bending portion 21 forms a self-supporting structure, which will not curl or shift even after repeated scraping. This solution, by setting a bending portion 21 that bends towards the center of the stator core 1 and is located within the slot opening 12, allows the insulating paper to form an outward opening support structure at the slot opening 12. During winding, the squeezing action of the enameled wire on the bending portion 21 is converted into a pressing force that makes it adhere tightly to the side wall 122 of the slot opening 12, thereby preventing the insulating paper from being hooked and pulled into the coil, effectively reducing the winding insulation failure rate.

[0039] In the above technical solution, optionally, the bending portion 21 includes a first bending portion 211 and a second bending portion 212, the first bending portion 211 and the second bending portion 212 are respectively disposed on both sides of the groove 12, and an opening 213 is formed between the first bending portion 211 and the second bending portion 212.

[0040] In this technical solution, the bending portion 21 is not a single-sided structure, but is composed of two independent bending segments. These two bending portions are located on the left and right sides of the slot 12, bending symmetrically or asymmetrically towards the stator center. A radially inward and outward through opening 213 is naturally formed between them. During the winding process, the enameled wire or winding needle can smoothly enter and exit the stator slot 11 through this opening 213. At the same time, the bending portions on both sides of the opening 213 constrain and guide the movement trajectory of the enameled wire, preventing it from deviating. By setting the first bending portion 211 and the second bending portion 212 on both sides of the slot 12, and forming the opening 213 between them, a double-sided guiding structure is formed, so that the enameled wire is uniformly guided when entering and exiting the slot 12.

[0041] In the above technical solutions, optionally, such as Figure 3 and Figure 4As shown, the bending angle α of the first bending portion 211 and the bending angle b of the second bending portion 212 are both greater than 0° and less than or equal to 90°.

[0042] In this technical solution, an angle of 0° indicates no bending (e.g., Figure 3 and Figure 4 At this point, the bent portion 21 is located at the position corresponding to the dotted line; this design excludes 0°. When the angle is 90°, the bent portion 21 is completely fitted to the side wall 122 of the groove 12 or is turned outward at a right angle. Here, the applicant needs to emphasize that... Figure 3 and Figure 4 When the bent portion 21 is completely fitted into the side wall 122 of the groove 12 (e.g.) Figure 3 and Figure 4 At this point, the bent portion 21 is located at the position corresponding to the dotted line, and its bending angle is not 90°, but approximately 80°. This is mainly due to the special structure of the stator core 1 in this application. However, for the case where the side wall 122 of the slot 12 is perpendicular to the top wall of the stator slot 11, the bent portion 21 in this application can achieve a 90° bend. The angle range can be flexibly selected according to the movement trajectory of the winding needle and the size of the slot 12. For scenarios where it is desired to retain a certain guiding slope, an intermediate angle of 30° to 60° can be selected. Precise control of the bending angle can be achieved through the mold angle of the forming tool. Within this angle range, the bent portion 21 will not lose its avoidance effect due to an excessively small angle, nor will it cause stress concentration and cracking at the root of the insulating paper due to an excessively large angle. By limiting the bending angle to between 0° and 90°, with options for 10° to 80° and 20° to 70°, the bending portion 21 has sufficient clearance without excessive bending that could damage the insulating paper 2, thus achieving a balance between manufacturability and anti-jamming performance.

[0043] In the above technical solutions, optionally, such as Figure 3 and Figure 4 As shown, the length of the first bending part 211 is L1, the length of the second bending part 212 is L2, and the depth of the slot 12 along the radial direction of the stator core 1 is L, wherein 0.8≤L1 / L≤1.5 and 0.8≤L2 / L≤1.5.

[0044] In this technical solution, lengths L1 and L2 refer to the straight-line distances measured along the surface of the insulating paper from the bending start point (i.e., the root of the bend) to the free end (the end away from the bending point) of the first bend 211 and the second bend 212, respectively. The depth L of the slot 12 refers to the vertical distance from the inner surface of the stator to the bottom of the slot 12 in the radial direction of the slot 12 of the stator slot 11. This solution limits the ratio of the bend length to the slot depth to be between 0.8 and 1.5. When the ratio is less than 0.8, the bend is too short and cannot effectively cover the side wall 122 of the slot 12, and the enameled wire may still come into contact with the edge of the unbent insulating paper; when the ratio is greater than 1.5, the bend is too long, and its free end may protrude from the slot 12 and extend into the stator inner hole area, rubbing against the rotating rotor. By controlling the ratio within the range of 0.8 to 1.5, it is ensured that the bending part has sufficient length to form an outwardly opening support surface, while avoiding interference with the rotor.

[0045] In the above technical solution, optionally, the first bent portion 211 and the second bent portion 212 are positioned relative to the center line of the stator slot 11 (e.g., Figure 2 The dashed line M in the middle is set symmetrically.

[0046] In this technical solution, the centerline of the stator slot 11 refers to the bisector line extending radially and dividing the slot opening 12 and the slot bottom into two halves. The first bending portion 211 and the second bending portion 212 are mirror-symmetrical with respect to this centerline, meaning that their bending angles, lengths, and shapes are equal. This symmetrical structure ensures that the insulating paper 2 on both sides of the slot opening 12 has a completely consistent shape. During winding, the lateral guiding force on the enameled wire is balanced, and the winding needle will not wobble due to resistance on one side, thus ensuring the neatness and consistency of the winding arrangement. By symmetrically arranging the first bending portion 211 and the second bending portion 212 with respect to the centerline of the stator slot 11, the force on both sides of the slot opening 12 is balanced during winding, the movement of the winding needle is more stable, and it is beneficial to improve the consistency of winding quality.

[0047] In the above technical solution, optionally, the bending angles of the first bending portion 211 and the second bending portion 212 are not equal.

[0048] In this technical solution, unlike the symmetrical structure, the bending angles of the first bending portion 211 and the second bending portion 212 are set to different values. This asymmetrical design is suitable for certain specific winding processes, such as when the entry and exit trajectory of the winding needle is biased towards one side of the slot 12, or when the winding direction is unidirectional (e.g., entering only from the left). In this case, the bending angle on the side facing the wire can be designed to be larger to completely avoid the obstacle, while the other side can be designed to be smaller. The asymmetrical structure can also adapt to stator cores 1 of different specifications, such as when the shapes of the two side walls 122 of the slot 12 are asymmetrical or the winding space is limited. By adjusting the angle difference, the movement path of the winding machine can be precisely matched to achieve the optimal avoidance effect.

[0049] In the above technical solutions, optionally, such as Figure 3 As shown, the end of the bent portion 21 away from the bending point O is located inside the groove 12.

[0050] In this technical solution, the "end furthest from the bending point" refers to the free end of the bent portion 21, which is the end of the insulating paper closest to the stator center after bending. "Located within the slot 12" means that the free end does not extend radially beyond the outer edge of the slot 12 (i.e., the boundary line between the slot 12 and the stator inner hole), nor circumferentially beyond the extension lines of the two side walls 122 of the slot 12. In other words, the free end is completely confined within the space enclosed by the slot 12 and will not protrude into the stator inner hole area. This feature ensures that even if the bent portion 21 is relatively long, its end remains safely within the slot 12, thereby avoiding contact with the outer surface of the rotor core.

[0051] In the above technical solutions, such as Figure 5 As shown, optionally, the stator assembly also includes insulating end plates 3, which are disposed at both ends of the stator core 1 in the axial direction. The insulating paper 2 and the insulating end plates 3 together constitute the insulating layer between the stator core 1 and the winding.

[0052] In this technical solution, the insulating end plate 3 is an annular plate made of insulating material (such as phenolic resin, polyester, or polyimide), which is installed on both axial end faces of the stator core 1. The insulating end plate 3 typically has slot-shaped holes corresponding to the positions of the stator slots 11, as well as wire slots or hanging posts for fixing the starting end of winding. After the insulating paper 2 is inserted into the stator slots 11, its axial ends overlap or abut against the inner surface of the insulating end plate 3, forming a continuous, gapless insulating barrier. The insulating paper 2 and the insulating end plate 3 together cover all surfaces of the stator core 1 that may come into contact with the enameled wire, constituting a complete insulation system. By setting the insulating end plate 3 and the insulating paper 2 together to form an insulating layer, a complete stator insulation system is formed, solving the problem of paper jamming during winding while ensuring the overall insulation reliability of the stator.

[0053] In the above technical solution, optionally, the bent portion 21 is fitted with the side wall 122 of the groove 12.

[0054] In this technical solution, "close contact" refers to the close contact between the inner surface of the bent portion 21 (the side facing the stator core 1) and the surface of the side wall 122 of the slot 12. This close contact can be achieved by setting the bending angle to approximately 90°, at which point the bent portion 21 is almost parallel to and tightly attached to the side wall 122 of the slot 12. After close contact, the bent portion 21 is supported by the side wall 122, making it less prone to wobbling or rebounding during winding vibrations, and its position is more stable. Simultaneously, the close contact also means that the bent portion 21 is completely removed from the main movement channel of the enameled wire, and the enameled wire will hardly collide with the bent portion 21, thus minimizing the risk of interference. By making the bent portion 21 close contact with the side wall 122 of the slot 12, the insulating paper can be firmly fixed to the slot wall after bending, preventing the bent portion 21 from wobbling or shifting during winding, thus improving structural stability.

[0055] A second aspect of the present invention provides an electric motor, comprising: a stator assembly as described in any of the above technical solutions.

[0056] In this technical solution, the motor includes not only the aforementioned stator assembly but also conventional components such as a rotor, housing, and end caps. The rotor is rotatably disposed within the inner hole of the stator core 1, forming an air gap with the stator core 1. Because the motor of this invention includes the aforementioned stator assembly, it also possesses all the beneficial effects of the aforementioned stator assembly.

[0057] A third aspect of the present invention provides a compressor, comprising: a motor as described above.

[0058] In this technical solution, the compressor can be a scroll compressor, a rotary piston compressor, or a reciprocating piston compressor, and it internally houses the aforementioned motor. The motor drives the compressor's crankshaft or rotor to perform compression. Because the compressor includes the aforementioned motor, it also possesses all the beneficial effects of the aforementioned stator assembly.

[0059] A fourth aspect of the present invention provides a refrigeration device, comprising: a compressor as described above; or a motor as described above.

[0060] In this technical solution, the refrigeration equipment can be an air conditioner, refrigerator, freezer, dehumidifier, or heat pump water heater, etc. The refrigeration equipment directly uses the aforementioned compressor as its core component, or directly uses the aforementioned motor as its drive source. Since the refrigeration equipment includes the aforementioned stator assembly, it also possesses all the beneficial effects of the aforementioned stator assembly.

[0061] In another embodiment of this application, an air conditioning compressor is provided.

[0062] It's important to understand that the air conditioning industry has very high capacity requirements during peak production periods, demanding high pass rates and output from production lines. This places extremely high demands on its core components, the stator core and the motor. The industry employs various techniques to achieve efficient stator production, including adding separate production line equipment to increase output through increased investment, and increasing single-line capacity by adding personnel. This embodiment aims to improve the pass rate of the production line and increase the output of the stator core by studying the characteristics of the stator winding process, thereby increasing overall capacity. During stator winding, due to the extremely limited winding space, insulation paper frequently gets caught in the enameled wire, resulting in a high defect rate. In highly automated environments, these defects cannot be detected in time, leading to significant wasted capacity. The motor and compressor provided in this embodiment primarily aim to reduce insulation paper entanglement defects, effectively improving the winding defect rate and increasing unit capacity.

[0063] The technical problem that the compressor in this embodiment aims to solve is that when winding in a narrow space, the enameled wire will interfere with the insulating paper. In extreme cases, the enameled wire will press the insulating paper into the coil, resulting in a reduction in electrical distance and easy insulation failure.

[0064] The key technical point of the compressor in this embodiment is to improve the shape of the insulating paper, avoid contact with the winding needle or enameled wire during winding, and prevent the enameled wire from pressing the insulating paper into the coil.

[0065] The technical effect of this embodiment is that it improves the shape of the insulating paper, reduces the probability of the enameled wire pressing the insulating paper into the coil, and significantly reduces the defect rate.

[0066] The specific structure of the compressor in this embodiment is as follows:

[0067] The air conditioning compressor includes a motor, which consists of a stator assembly and a rotor assembly. The stator assembly is composed of a stator core 1, enameled wire, insulating paper 2, and insulating end plates 3 on both sides of the stator core 1.

[0068] The insulating paper 2 forms a bending angle at the slot 12. The bending angle includes a first bending angle and a second bending angle, both of which are between 0° and 90°.

[0069] The length of the insulating paper 2 at slot 12 is not higher than the inner surface of the stator core 1.

[0070] The ratios of the lengths L1 and L2 of the two bends to the depth L of the groove 12 are: 0.8≤L1 / L≤1.5, 0.8≤L2 / L≤1.5.

[0071] The thickness of the insulating paper 2 is between 0.1 mm and 0.3 mm.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with this embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one embodiment or example.

[0073] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that, include: A stator core having multiple stator slots; Insulating paper is disposed inside the stator slot; The insulating paper has a bent portion at the slot opening of the stator slot, the bent portion bends toward the center of the stator core, and the bent portion is located inside the slot opening.

2. The stator assembly according to claim 1, characterized in that, The bending portion includes a first bending portion and a second bending portion, which are respectively disposed on both sides of the groove, and an opening is formed between the first bending portion and the second bending portion.

3. The stator assembly according to claim 2, characterized in that, The bending angles of both the first and second bending portions are greater than 0° and less than or equal to 90°.

4. The stator assembly according to claim 2, characterized in that, The length of the first bend is L1, the length of the second bend is L2, and the groove depth along the radial direction of the stator core is L, wherein 0.8≤L1 / L≤1.5 and 0.8≤L2 / L≤1.

5.

5. The stator assembly according to claim 2, characterized in that, The first bend and the second bend are symmetrically arranged with respect to the center line of the stator slot.

6. The stator assembly according to claim 2, characterized in that, The bending angles of the first bend and the second bend are not equal.

7. The stator assembly according to any one of claims 1 to 6, characterized in that, The end of the bent portion away from the bending point is located inside the groove.

8. The stator assembly according to any one of claims 1 to 6, characterized in that, Also includes: Insulating end plates are disposed at both axial ends of the stator core, and the insulating paper and the insulating end plates together constitute the insulating layer between the stator core and the winding.

9. The stator assembly according to any one of claims 1 to 6, characterized in that, The bent portion fits against the side wall of the groove.

10. An electric motor, characterized in that, include: The stator assembly as described in any one of claims 1 to 9.

11. A compressor, characterized in that, include: The motor as described in claim 10.

12. A refrigeration device, characterized in that, include: The compressor as described in claim 11; or The motor as described in claim 10.

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