Stator assembly, alternating-current single-phase asynchronous motor and air conditioner

Abstract

The invention provides a stator assembly, an alternating current single-phase asynchronous motor and an air conditioner, the stator assembly comprises a stator iron core, the stator iron core comprises an inner iron core and an outer iron core, the inner iron core is provided with an inner yoke ring, and the outer iron core is provided with an outer yoke ring. The outer iron core is sleeved on the radial outer side of the inner iron core, a winding containing space is formed between the inner yoke ring and the outer yoke ring, and the main phase winding and the auxiliary phase winding are located in the winding containing space and are both concentric windings. According to the invention, energy efficiency loss caused by magnetic flux leakage of a product can be reduced, and the energy efficiency of the AC single-phase asynchronous motor is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning, and in particular relates to a stator assembly, an AC single-phase asynchronous motor, and an air conditioner. Background Art

[0002] AC single-phase asynchronous motors are widely used in air conditioner outdoor units, mainly due to their low cost and high reliability. However, with the development of the industry and the improvement of product energy efficiency requirements, ordinary AC single-phase asynchronous motors are gradually unable to meet the requirements after energy efficiency upgrades. The use of DC products (i.e. DC motors) can fully meet the requirements of energy efficiency upgrades, but this is accompanied by an increase in the cost of chips and controllers for DC motor products, and the reliability of more sophisticated chip components is relatively poor compared to AC motors. Therefore, improving the energy efficiency of AC single-phase asynchronous motor products is a feasible technical route. Summary of the invention

[0003] Therefore, the present invention provides a stator assembly, an AC single-phase asynchronous motor, and an air conditioner, which can overcome the technical problem in the related art that the stator core with concentric windings has low motor energy efficiency when used in the motor.

[0004] In order to solve the above problems, the present invention provides a stator assembly, including a stator core, wherein the stator core includes an inner core and an outer core, the inner core has an inner yoke ring, the outer core has an outer yoke ring, the outer core is sleeved on the radial outer side of the inner core and forms a winding accommodating space between the inner yoke ring and the outer yoke ring, the main phase winding and the auxiliary phase winding are located in the winding accommodating space, and the main phase winding and the auxiliary phase winding are both concentric windings.

[0005] In some embodiments, one of the main phase winding and the auxiliary phase winding is wound on the outer yoke ring, and the other is wound on the inner yoke ring.

[0006] In some embodiments, the radial inner circumferential wall of the outer yoke ring has a plurality of outer winding portions, the outer winding portion includes a first outer stator tooth and a second outer stator tooth at the tooth top of the first outer stator tooth, the main phase winding includes a concentrically arranged main phase large winding and a main phase small winding, the main phase large winding is wound on the first outer stator tooth, and the main phase small winding is wound on the second outer stator tooth; and / or, the radial outer circumferential wall of the inner yoke ring has a plurality of inner winding portions, the inner winding portion includes a first inner stator tooth and a second inner stator tooth at the tooth top of the first inner stator tooth, the auxiliary phase winding includes a concentrically arranged auxiliary phase large winding and an auxiliary phase small winding, the auxiliary phase large winding is wound on the first inner stator tooth, and the auxiliary phase small winding is wound on the second inner stator tooth.

[0007] In some embodiments, the outer winding portions and the inner winding portions are alternately arranged around a central axis of the stator core.

[0008] In some embodiments, in the circumferential direction of the stator core, a winding common slot is formed between adjacent second outer stator teeth and second inner stator teeth, and the main phase small winding and the auxiliary phase small winding are both wound around the winding common slot.

[0009] In some embodiments, the tooth top of the second outer stator tooth has an outer convex strip extending toward the inner yoke ring, the outer convex strip abuts against the radial outer circumferential wall of the inner yoke ring and is located between two circumferentially adjacent large windings of the secondary phase of the stator core; and / or, the tooth top of the second inner stator tooth has an inner convex strip extending toward the outer yoke ring, the inner convex strip abuts against the radial inner circumferential wall of the outer yoke ring and is located between two circumferentially adjacent large windings of the main phase of the stator core.

[0010] In some embodiments, the outer convex strip is clamped with the inner yoke ring; and / or the inner convex strip is clamped with the outer yoke ring.

[0011] In some embodiments, the outer sides of the first outer stator tooth and the second outer stator tooth are covered with an outer insulating frame, and the outer insulating frame has a first wrapping portion covering the outer wall of the outer convex strip; and / or, the outer sides of the first inner stator tooth and the second inner stator tooth are covered with an inner insulating frame, and the inner insulating frame has a second wrapping portion covering the outer wall of the inner convex strip.

[0012] In some embodiments, the outer insulating skeleton also has outer protective wings extending to both sides along the circumference of the stator core, and each of the outer protective wings is respectively arranged at the tooth top position of the first outer stator tooth and the second outer stator tooth; and / or, the inner insulating skeleton also has inner protective wings extending to both sides along the circumference of the stator core, and each of the inner protective wings is respectively arranged at the tooth top position of the first inner stator tooth and the second inner stator tooth.

[0013] The present invention also provides an AC single-phase asynchronous motor, comprising the above-mentioned stator assembly.

[0014] The present invention also provides an air conditioner, comprising the above-mentioned AC single-phase asynchronous motor.

[0015] The stator assembly, AC single-phase asynchronous motor and air conditioner provided by the present invention have the following beneficial effects:

[0016] The winding accommodation space formed by the inner and outer cores is a closed slot structure. The main phase winding and the auxiliary phase winding are wound in the winding accommodation space, which can reduce the energy efficiency loss caused by magnetic leakage of the product and effectively improve the energy efficiency of the AC single-phase asynchronous motor.

[0017] One of the main phase winding and the auxiliary phase winding is wound on the outer yoke ring, and the other is wound on the inner yoke ring, so that the main phase winding and the auxiliary phase winding can be separated. At the same time, because the inner yoke ring and the outer yoke ring are assembled separately, the parallel separation of the winding process of the main phase winding and the auxiliary phase winding is realized, which can significantly improve the production efficiency of the product;

[0018] By forming a winding common slot 5 between the adjacent second outer stator teeth and the second inner stator teeth, the wiring harnesses of one side of both the main phase small winding and the auxiliary phase small winding can be accommodated therein at the same time, thereby further improving the structural compactness of the stator assembly (the volume can be smaller) and improving the slot utilization rate. Under the premise of the stator core with the same outer diameter, the use of the winding common slot in the technical solution of the present invention can also increase the radial width of the outer yoke ring and the inner yoke ring, thereby ensuring the mechanical strength of the core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of the stator assembly in an embodiment of the present invention (the insulating frame is omitted in the figure);

[0021] Figure 2 yes Figure 1 A top view of a stator assembly in FIG.

[0022] Figure 3 is a schematic diagram of the three-dimensional structure of a stator assembly in another embodiment of the present invention (with different stacking thickness);

[0023] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the outer iron core;

[0024] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of the inner iron core;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure after the outer iron core and the inner iron core in the present invention are sheathed inside and outside;

[0026] Figure 7 is an axial projection diagram of an outer insulating skeleton in a stator assembly according to an embodiment of the present invention;

[0027] Figure 8is an axial projection diagram of an inner insulating skeleton in a stator assembly according to an embodiment of the present invention;

[0028] Fig. 9 is an axial projection diagram of a stator assembly according to another embodiment of the present invention (windings omitted);

[0029] Fig.10 yes Figure 1 Schematic diagram of the three-dimensional structure of the main phase winding and the auxiliary phase winding.

[0030] The accompanying drawings are marked as follows:

[0031] 1. Inner iron core; 11. Inner yoke ring; 111. First inner stator tooth; 112. Second inner stator tooth; 113. Inner convex strip; 2. Outer iron core; 21. Outer yoke ring; 211. First outer stator tooth; 212. Second outer stator tooth; 213. Outer convex strip; 31. Large winding of main phase; 32. Small winding of main phase; 41. Large winding of auxiliary phase; 42. Small winding of auxiliary phase; 51. Common groove for windings; 61. Outer insulating frame; 611. First wrapping part; 612. Outer protective wing; 62. Inner insulating frame; 621. Second wrapping part; 622. Inner protective wing; 71. Dovetail block; 72. Dovetail groove. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0035] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0036] See also Figures 1 to 10 As shown, according to an embodiment of the present invention, a stator assembly is provided, which is applied to an AC single-phase asynchronous motor, including a stator core (not labeled in the figure), the stator core including an inner core 1 and an outer core 2, the inner core 1 having an inner yoke ring 11, the outer core 2 having an outer yoke ring 21, the outer core 2 being sleeved on the radial outer side of the inner core 1 and forming a winding accommodating space (not labeled in the figure) between the inner yoke ring 11 and the outer yoke ring 21, the main phase winding (not labeled in the figure) and the auxiliary phase winding (not labeled in the figure) are in the winding accommodating space, and the main phase winding and the auxiliary phase winding are both concentric windings. It can be understood that the outer yoke ring 21 and the inner yoke ring 11 respectively form a circumferentially continuous solid annular structure around the central axis of the stator core. In addition, the inner core 1 and the outer core 2 are respectively formed by axially stacking corresponding punching sheets.

[0037] This technical solution adopts a closed slot structure for the winding accommodating space formed by the inner and outer cores 1 and 2, and the main phase winding and the auxiliary phase winding are wound in the winding accommodating space, which can reduce the energy efficiency loss caused by magnetic leakage of the product and effectively improve the energy efficiency of the AC single-phase asynchronous motor.

[0038] In some embodiments, one of the main phase winding and the auxiliary phase winding is wound on the outer yoke ring 21 , and the other is wound on the inner yoke ring 11 .

[0039] In this technical solution, one of the main phase winding and the auxiliary phase winding is wound on the outer yoke ring 21, and the other is wound on the inner yoke ring 11, so that the phase separation of the main phase winding and the auxiliary phase winding can be achieved. At the same time, since the inner yoke ring 11 and the outer yoke ring 21 are assembled in a separate manner, the parallel separation of the winding processes of the main phase winding and the auxiliary phase winding is achieved, which can significantly improve the product production efficiency.

[0040] In some embodiments, the radial inner peripheral wall of the outer yoke ring 21 has a plurality of outer winding portions (not labeled in the figure), the outer winding portion includes a first outer stator tooth 211 and a second outer stator tooth 212 located at the tooth top of the first outer stator tooth 211, the main phase winding includes a concentrically arranged main phase large winding 31 and a main phase small winding 32, the main phase large winding 31 is wound on the first outer stator tooth 211, and the main phase small winding 32 is wound on the second outer stator tooth 21 2; and / or, the radial outer peripheral wall of the inner yoke ring 11 has a plurality of inner winding portions (not marked in the figure), the inner winding portions include a first inner stator tooth 111 and a second inner stator tooth 112 located at the tooth top of the first inner stator tooth 111, the auxiliary phase winding includes a concentrically arranged auxiliary phase large winding 41 and an auxiliary phase small winding 42, the auxiliary phase large winding 41 is wound on the first inner stator tooth 111, and the auxiliary phase small winding 42 is wound on the second inner stator tooth 112.

[0041] In this technical solution, each outer winding portion on the radial inner circumferential wall of the outer yoke ring 21 includes a first outer stator tooth 211 and a second outer stator tooth 212 on the tooth top of the first outer stator tooth 211, and each inner winding portion on the radial inner circumferential wall of the inner yoke ring 11 includes a first inner stator tooth 111 and a second inner stator tooth 112 on the tooth top of the first inner stator tooth 111, thereby realizing the requirements of the stepped and concentric arrangement of the main phase large winding 31 and the main phase small winding 32 in the radial direction of the outer yoke ring 21, and the stepped and concentric arrangement of the auxiliary phase large winding 41 and the auxiliary phase small winding 42 in the radial direction of the inner yoke ring 11, and the structure is simple and compact.

[0042] In some embodiments, the outer winding portions and the inner winding portions are alternately arranged around a central axis of the stator core.

[0043] In this technical solution, by alternately arranging the outer winding parts and the inner winding parts in the circumferential direction of the stator core, the aforementioned winding accommodating space for accommodating each winding can be formed between each adjacent first outer stator tooth 211 and first inner stator tooth 111 and between the second outer stator tooth 212 and the second inner stator tooth 112, and the structural design is more compact.

[0044] See Figure 2As shown, in the circumferential direction of the stator core, a winding common slot 51 is formed between the adjacent second outer stator teeth 212 and the second inner stator teeth 112 , and the main phase small winding 32 and the auxiliary phase small winding 42 are both wound around the winding common slot 51 .

[0045] In this technical solution, by forming a winding common slot 51 between the adjacent second outer stator teeth 212 and the second inner stator teeth 112, the wire harnesses of one side of the main phase small winding 32 and the auxiliary phase small winding 42 can be accommodated therein at the same time, further improving the compactness of the stator assembly (the volume can be smaller) and improving the slot utilization rate. Under the premise of the same outer diameter of the stator core, the use of the winding common slot 51 in the technical solution of the present invention can also increase the radial width of the outer yoke ring 21 and the inner yoke ring 11, thereby ensuring the mechanical strength of the core. For details, see Figure 2 As shown, a second inner stator tooth 112 is located in a first slot body formed between two circumferentially adjacent second outer stator teeth 212, so that the second inner stator tooth 112 is used to separate the aforementioned first slot body into two aforementioned winding common slots 51. Similarly, a second outer stator tooth 212 is located in a second slot body formed between two circumferentially adjacent second inner stator teeth 112, so that the second outer stator tooth 212 is used to separate the aforementioned second slot body into two aforementioned winding common slots 51.

[0046] In some embodiments, the tooth top of the second outer stator tooth 212 has an outer ridge 213 extending toward the inner yoke ring 11, and the outer ridge 213 abuts against the radial outer peripheral wall of the inner yoke ring 11 and is located between two circumferentially adjacent auxiliary phase large windings 41 of the stator core; and / or, the tooth top of the second inner stator tooth 112 has an inner ridge 113 extending toward the outer yoke ring 21, and the inner ridge 113 abuts against the radial inner peripheral wall of the outer yoke ring 21 and is located between two circumferentially adjacent main phase large windings 31 of the stator core.

[0047] In this technical solution, by providing an outer convex strip 213 on the second outer stator tooth 212 to abut against the radial outer peripheral wall of the inner yoke ring 11, and by providing an inner convex strip 113 on the second inner stator tooth 112 to abut against the radial outer peripheral wall of the outer yoke ring 21, the overall mechanical strength of the stator core in the assembled state can be improved, and the deformation resistance between the inner yoke ring 11 and the outer yoke ring 21 can be improved.

[0048] The inner yoke ring 11 and the outer yoke ring 21 can be connected as one body by means of interference fit. In a preferred embodiment, the outer convex strip 213 is clamped with the inner yoke ring 11; and / or the inner convex strip 113 is clamped with the outer yoke ring 21. Of course, in some embodiments, only part of the outer convex strip 213 or the inner convex strip 113 can be clamped with the corresponding yoke ring. For details, see Figure 2 As described, in a specific embodiment, a dovetail groove 72 is constructed on the inner convex strip 113, and a dovetail block 71 is provided on the inner circumferential wall of the outer yoke ring 21 corresponding to the position thereof. The dovetail block 71 can be slidably engaged in the dovetail groove 72 along the axial direction of the stator core, thereby improving the assembly efficiency and convenience of the inner core 1 and the outer core 2.

[0049] In some embodiments, the outer side of the first outer stator tooth 211 and the second outer stator tooth 212 is covered with an outer insulating frame 61, and the outer insulating frame 61 has a first wrapping portion 611 covering the outer wall of the outer convex strip 213; and / or, the outer side of the first inner stator tooth 111 and the second inner stator tooth 112 is covered with an inner insulating frame 62, and the inner insulating frame 62 has a second wrapping portion 621 covering the outer wall of the inner convex strip 113. It can be understood that the outer insulating frame 61 and the inner insulating frame 62 should also be provided with corresponding winding slots and corresponding limiting components to achieve the positioning and fixation of the main phase winding and the auxiliary phase winding.

[0050] In this technical solution, the first wrapping portion 611 and the second wrapping portion 621 form an insulating cover for the outer convex strip 213 and the inner convex strip 113 to ensure insulation protection of the stator core.

[0051] See also Figures 7 to 9 As shown, in some embodiments, the outer insulating skeleton 61 further has outer protective wings 612 extending to both sides along the circumference of the stator core, and each of the outer protective wings 612 is respectively arranged at the tooth top position of the first outer stator tooth 211 and the second outer stator tooth 212; and / or, the inner insulating skeleton 62 further has inner protective wings 622 extending to both sides along the circumference of the stator core, and each of the inner protective wings 622 is respectively arranged at the tooth top position of the first inner stator tooth 111 and the second inner stator tooth 112. The outer protective wings 612 and the inner protective wings 622 can limit the winding position and effectively protect the winding, so as to prevent the winding from being damaged in the subsequent assembly process.

[0052] The stator assembly of the present invention is assembled and manufactured in the following manner:

[0053] The first step: using a high-pressure punching machine to punch and laminate the materials for producing the stator core, namely the inner core 1 and the outer core 2;

[0054] Step 2: Use insulating frames (i.e., outer insulating frame 61 and inner insulating frame 62) on the inner and outer cores (i.e., inner core 1 and outer core 2) to provide insulation protection;

[0055] Step 3: Use winding equipment to wind the main and auxiliary windings respectively onto the reserved positions of the insulation frame;

[0056] Step 4: Assemble the inner iron core and the outer iron core with the insulating frame and the main phase winding and the auxiliary phase winding, and put them together to complete the production of the stator assembly.

[0057] Step 5: Enter the post-stator production process, such as power line welding, positioning, performance inspection, etc., and finally obtain the stator assembly.

[0058] According to an embodiment of the present invention, there is also provided an AC single-phase asynchronous motor, comprising the above-mentioned stator assembly.

[0059] According to an embodiment of the present invention, there is also provided an air conditioner, comprising the above-mentioned AC single-phase asynchronous motor.

[0060] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A stator assembly, characterized in that: The invention comprises a stator core, wherein the stator core comprises an inner core (1) and an outer core (2), wherein the inner core (1) has an inner yoke ring (11), and the outer core (2) has an outer yoke ring (21), wherein the outer core (2) is mounted on the radially outer side of the inner core (1) and forms a winding accommodating space between the inner yoke ring (11) and the outer yoke ring (21), wherein a main phase winding and an auxiliary phase winding are located in the winding accommodating space, and the main phase winding and the auxiliary phase winding are both concentric windings.

2. The stator assembly according to claim 1, characterized in that One of the main phase winding and the auxiliary phase winding is wound on the outer yoke ring (21), and the other is wound on the inner yoke ring (11).

3. The stator assembly according to claim 2, characterized in that: The radial inner peripheral wall of the outer yoke ring (21) is provided with a plurality of outer winding portions, the outer winding portions comprising a first outer stator tooth (211) and a second outer stator tooth (212) located at the tooth top of the first outer stator tooth (211), the main phase winding comprising a main phase large winding (31) and a main phase small winding (32) arranged concentrically, the main phase large winding (31) being wound on the first outer stator tooth (211), and the main phase small winding (32) being wound on the second outer stator tooth (212); and / Alternatively, the radial outer peripheral wall of the inner yoke ring (11) has a plurality of inner winding portions, the inner winding portions comprising a first inner stator tooth (111) and a second inner stator tooth (112) located at the tooth top of the first inner stator tooth (111), the auxiliary phase winding comprising a concentrically arranged auxiliary phase large winding (41) and an auxiliary phase small winding (42), the auxiliary phase large winding (41) being wound on the first inner stator tooth (111), and the auxiliary phase small winding (42) being wound on the second inner stator tooth (112).

4. The stator assembly according to claim 3, characterized in that: The outer winding parts and the inner winding parts are alternately arranged around the central axis of the stator core.

5. The stator assembly according to claim 4, characterized in that: In the circumferential direction of the stator core, a winding common slot (51) is formed between the adjacent second outer stator teeth (212) and the second inner stator teeth (112), and the main phase small winding (32) and the auxiliary phase small winding (42) are both wound around the winding common slot (51).

6. The stator assembly according to claim 4, characterized in that The tooth top of the second outer stator tooth (212) has an outer convex strip (213) extending toward the inner yoke ring (11), and the outer convex strip (213) abuts against the radial outer peripheral wall of the inner yoke ring (11) and is located between two adjacent auxiliary phase large windings (41) in the circumferential direction of the stator core; and / or the tooth top of the second inner stator tooth (112) has an inner convex strip (113) extending toward the outer yoke ring (21), and the inner convex strip (113) abuts against the radial inner peripheral wall of the outer yoke ring (21) and is located between two adjacent main phase large windings (31) in the circumferential direction of the stator core.

7. The stator assembly according to claim 6, characterized in that The outer convex strip (213) is clamped with the inner yoke ring (11); and / or the inner convex strip (113) is clamped with the outer yoke ring (21).

8. The stator assembly according to claim 6, characterized in that The outer sides of the first outer stator tooth (211) and the second outer stator tooth (212) are covered with an outer insulating frame (61), and the outer insulating frame (61) has a first wrapping portion (611) covering the outer wall of the outer convex strip (213); and / or the outer sides of the first inner stator tooth (111) and the second inner stator tooth (112) are covered with an inner insulating frame (62), and the inner insulating frame (62) has a second wrapping portion (621) covering the outer wall of the inner convex strip (113).

9. The stator assembly according to claim 8, characterized in that The outer insulating skeleton (61) also has outer protective wings (612) extending to both sides along the circumference of the stator core, and each of the outer protective wings (612) is respectively arranged at the tooth top position of the first outer stator tooth (211) and the second outer stator tooth (212); and / or, the inner insulating skeleton (62) also has inner protective wings (622) extending to both sides along the circumference of the stator core, and each of the inner protective wings (622) is respectively arranged at the tooth top position of the first inner stator tooth (111) and the second inner stator tooth (112).

10. An AC single-phase asynchronous motor, characterized in that: A stator assembly comprising any one of claims 1 to 9.

11. An air conditioner, characterized in that: Including the AC single-phase asynchronous motor as described in claim 10.

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