Stator structure applied to compressor motor

Abstract

A stator structure applied to a compressor motor comprises a stator iron core, the outer contour of the stator iron core comprises a plurality of arc segments and a plurality of straight line segments, each arc segment is adjacent to two straight line segments, each straight line segment is provided with a recessed segment, the outer diameter of the stator iron core is D, the product thickness of the stator iron core is T, the following relational expressions are satisfied: 1.55 < = D / T < = 3.65, and D < = 126mm; the arc segments are dispersedly arranged on the same circumference, the arc lengths of the arc segments are not completely equal, and the transmission of stator shock waves can be effectively inhibited through the asymmetric structural design of the outer edge of the stator core, so that the low and medium frequency noise in the compressor motor is remarkably improved, the hearing experience of a user is improved, the noise is reduced, and the service life of the compressor motor is prolonged. The efficiency of the compressor motor can be kept not affected, and dual optimization of performance and noise control is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field especially is applied to a stator structure of compressor motor. BACKGROUND

[0002] With the market's increasing demand for energy efficiency of household power equipment (for example: air conditioners, dehumidifiers, clothes dryers, and other household equipment), the type of compressor in these devices is gradually shifting from fixed-speed compressors to variable-frequency compressors.

[0003] However, variable-frequency compressors tend to produce significant noise at high speeds, especially electromagnetic noise from the motor. This is caused by the electromagnetic force generated by the interaction of the stator and rotor magnetic fields exciting the motor stator. When the stator modal frequency is close to the electromagnetic force harmonic frequency, resonance occurs, which significantly increases noise, adversely affecting user experience. As modern living standards improve, users have become more sensitive to vibration and noise, and countries have increasingly stringent standards for compressor noise in air conditioners, dehumidifiers, clothes dryers, and other equipment. To reduce vibration and noise, motor designs typically optimize rotor or stator structural design to adjust air gap harmonics or reduce magnetic field strength, but this approach often results in performance degradation and limited effectiveness.

[0004] In view of the above, the present inventors have diligently researched and applied relevant theories to address the aforementioned issues, which is the goal of the present improvement. SUMMARY

[0005] Therefore, the main purpose of the present utility model is to provide a stator structure for a compressor motor that effectively suppresses the transmission of stator shock waves by asymmetrically designing the outer edge of the stator, significantly improving the low-frequency noise in the compressor motor and enhancing the user's auditory experience. This design maintains the efficiency of the compressor motor while reducing noise, achieving dual optimization of performance and noise control to address the issues of the prior art.

[0006] To achieve the aforementioned objectives, the present utility model provides a stator structure for a compressor motor, comprising a stator core, wherein the center of the stator core is provided with an axial hole that extends through both ends of the stator core.

[0007] The outer contour of the stator core includes multiple arc segments and multiple straight segments, with the arc segments adjacent to the two straight segments. Each straight segment is provided with a recessed segment that extends along the axial direction of the stator core.

[0008] The outer diameter of the stator core is D, the integral thickness of the stator core is T, and the following relationship is satisfied: 1.55≦D / T≦3.65, and D≦126mm; and the arc segments are arranged on the same circumference, and the arc lengths of the arc segments are not completely equal.

[0009] Preferably, the center points of the recessed sections of the two straight sections on both sides of the arc segment form an angle with the center of the stator core, so that the stator core is divided into two first stator yoke sections, one second stator yoke section, and two third stator yoke sections in sequence along the circumferential direction with the shaft hole as the center.

[0010] Preferably, the angle of the first stator yoke section is θ1, satisfying 70°≦θ1≦90°; the angle of the second stator yoke section is θ2, satisfying 110°≦θ2≦130°; and the angle of the third stator yoke section is θ3, satisfying 30°≦θ3≦50°.

[0011] Preferably, the angle formed by the two ends of the arc segment of each first stator yoke section with the center of the stator core is X1, satisfying 50°≦X1≦60°; the angle formed by the two ends of the arc segment of the second stator yoke section with the center of the stator core is X2, satisfying 90°≦X2≦100°; and the angle formed by the two ends of the arc segment of each third stator yoke section with the center of the stator core is X3, satisfying 10°≦X3≦20°.

[0012] Preferably, the stator further comprises a plurality of stator teeth, the stator teeth are respectively connected to the first stator yoke section, the second stator yoke section, and the third stator yoke section of the stator core and are arranged on the inner side thereof along the circumferential direction, and a stator slot is defined between each adjacent two stator teeth.

[0013] Preferably, the number of the stator teeth and the stator slots is 9 respectively, and each first stator yoke section is provided with 2 stator slots, the second stator yoke section is provided with 3 stator slots, and each third stator yoke section is provided with 1 stator slot.

[0014] Preferably, the center points of the recessed sections of the two straight sections on both sides of the arc segment form an angle with the center of the stator core, so that the stator core is divided into three first stator yoke sections and three second stator yoke sections with the shaft hole as the center, and the first stator yoke sections and the second stator yoke sections are alternately arranged along the circumferential direction.

[0015] Preferably, the angle of the first stator yoke section is θ1, satisfying 70°≦θ1≦90°; and the angle of the second stator yoke section is θ2, satisfying 30°≦θ2≦50°.

[0016] Preferably, the two ends of the arc segment of the first stator yoke portion region form an angle X1 with the center of the stator core, satisfying 50°≦X1≦60°; the two ends of the arc segment of the second stator yoke portion region form an angle X2 with the center of the stator core, satisfying 10°≦X2≦20°.

[0017] Preferably, the stator further comprises a plurality of stator teeth, which are respectively connected to the first stator yoke portion region and the second stator yoke portion region of the stator core and are arranged on the inner side of the stator core in a circumferential direction, and a stator slot is defined between each adjacent two stator teeth.

[0018] Preferably, the number of the stator teeth and the stator slots is 9 respectively, and each first stator yoke portion region is provided with 2 stator slots and each second stator yoke portion region is provided with 1 stator slot.

[0019] Through the above structure, the beneficial effects of the present application are as follows: a stator structure applied to a compressor motor is provided, which has specific structural parameters and shape characteristics to effectively improve the middle and low frequency noise of the compressor motor and improve the listening experience, while maintaining the stability of the efficiency of the compressor motor. The outer diameter of the stator core is not more than 126 mm, and the ratio of the outer diameter of the stator core to the height needs to meet the range of 1.55≦D / T≦3.65, where D is the outer diameter of the stator core and T is the thickness of the stator core. Under this structural limitation, the outer edge shape of the stator structure adopts an asymmetric design, or the number of symmetries is set to 1 / 3 of the number of stator slots, to effectively improve the natural frequency of the stator. Through the design of this technical solution, the natural frequency of the stator structure is improved, which can effectively suppress the transmission of shock waves generated by the operation of the compressor motor and reduce the possibility of structural resonance, thereby improving the noise problem in the middle and low frequency range. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a side view of the stator structure of the present application.

[0021] Figure 2 It is a top view (I) of the first embodiment of the stator structure of the present application.

[0022] Figure 3 It is a top view (II) of the first embodiment of the stator structure of the present application.

[0023] Figure 4 It is a top view (I) of the second embodiment of the stator structure of the present application.

[0024] Figure 5 It is a top view (II) of the second embodiment of the stator structure of the present application.

[0025] SYMBOL EXPLANATION

[0026] DETAILED DESCRIPTION

[0027] In order to understand the features, content and advantages of the present application and the effects thereof, the present application will be described in detail below in the form of embodiments with reference to the accompanying drawings, wherein the drawings are only intended to illustrate the main idea and assist the description, and are not necessarily the real proportions and accurate configurations after the implementation of the present application, and therefore should not be interpreted as limiting the scope of the present application in the actual implementation according to the proportions and configurations of the drawings.

[0028] The advantages, features and achieved technical methods of the present application will be described in more detail and more easily understood with reference to the exemplary embodiments and the accompanying drawings, and the present application can be implemented in different forms, and therefore should not be understood as being limited to the embodiments described herein. On the contrary, the embodiments provided herein will make the present disclosure more thorough and comprehensive and will fully convey the scope of the present application to those skilled in the art, and the present application will be defined only by the appended claims.

[0029] Please refer to Figures 1 to 3 As shown in the drawings, the stator structure applied to the compressor motor of the present application comprises a stator core 10, which is a cylindrical body with a predetermined length. The stator core 10 is provided with an axial hole 101 at the center, which penetrates through both ends of the stator core 10 and is used to accommodate a rotor (not shown in the drawings). The stator core 10 is formed by a plurality of silicon steel sheets which are punched by a high-precision punching die and then overlapped from bottom to top to form the aforementioned cylindrical body, so as to ensure excellent dimensional accuracy and magnetic properties. The center of each silicon steel sheet is provided with an inner hole, which forms the axial hole 101 of the stator structure 1 in cooperation with the rotor after overlapping.

[0030] The outer contour of the stator core 10 comprises a plurality of arc segments 102 and a plurality of straight line segments 103. The arc segment 102 is adjacent to the two straight line segments 103, and together forms a continuous outer shape. Each straight line segment 103 is provided with a recessed segment 104, which extends along the axial direction of the stator core 10 to achieve the effect of compressor refrigerant flow. The outer diameter of the stator core 10 is D, and the thickness of the stator core 10 is T, which satisfies the following relationship: 1.55 ≦ D / T ≦ 3.65, and D ≦ 126 mm. The arc segments 102 are dispersedly arranged on the same circumference, and the arc lengths of the arc segments 102 are not completely equal.

[0031] In another aspect, the ratio between the overall design outer diameter D and the product thickness T must satisfy the condition 1.55≦D / T≦3.65, and the outer diameter D must not exceed 126 mm. In addition, the arc segments 102 are distributed on the same circumference, but the arc lengths of the arc segments 102 are not completely equal, which shows the fine adjustment of the design in terms of geometry and functionality. This structural design has a significant effect on improving the stability of the compressor motor and optimizing the electromagnetic performance, and can effectively suppress the transmission of shock waves in the stator, thereby reducing the low-frequency noise of the compressor motor. In addition, the design fully considers the specific application requirements, and is particularly suitable for the use requirements of devices such as rotary compressors, and has both performance improvement and practicality.

[0032] For the overall embodiment of the stator core 10, further as follows:

[0033] First embodiment

[0034] In this embodiment, the center points of the recessed segments 104 of the straight line segments 103 on both sides of the arc segments 102 form an angle (θ1, θ2, θ3) with the center of the stator core 10, and the stator core 10 is divided into two first stator yoke regions A1, one second stator yoke region A2, and two third stator yoke regions A3 in sequence along the circumferential direction with the shaft hole 101 as the center. Specifically, these regions are distributed in the circumferential direction according to a specific arrangement order, which is: first stator yoke region A1, first stator yoke region A1, second stator yoke region A2, third stator yoke region A3, third stator yoke region A3. In addition, the designer can adjust the arrangement order of these regions according to the production or design requirements to adapt to different application requirements or design schemes.

[0035] In the foregoing, the included angle of the first stator yoke portion region A1 is θ1, and 70°≦θ1≦90° is satisfied; the included angle of the second stator yoke portion region A2 is θ2, and 110°≦θ2≦130° is satisfied; and the included angle of the third stator yoke portion region A3 is θ3, and 30°≦θ3≦50° is satisfied. Specifically, in the structural design of the stator core 10, the included angles (θ1, θ2, θ3) of the respective stator yoke portion regions are planned according to functional requirements, wherein the included angle θ1 of the first stator yoke portion region A1 ranges between 70° and 90°; the included angle θ2 of the second stator yoke portion region A2 ranges between 110° and 130°; and the included angle θ3 of the third stator yoke portion region A3 ranges between 30° and 50°, and the sum of the included angles (θ1, θ2, θ3) must equal 360°. In addition, the included angle θ1 of the first stator yoke portion region A1, the included angle θ2 of the second stator yoke portion region A2, and the included angle θ3 of the third stator yoke portion region A3 can be adjusted according to production or design requirements in other embodiments, to meet the requirements of different application scenarios, to ensure that the product adapts to diversified use requirements and performance optimization goals (such as Figure 2 indicated).

[0036] Furthermore, the two ends of each arc segment 102 of the first stator yoke portion region A1 form an included angle X1 with the center of the stator core 10, and 50°≦X1≦60° is satisfied; the two ends of the arc segment 102 of the second stator yoke portion region A2 form an included angle X2 with the center of the stator core 10, and 90°≦X2≦100° is satisfied; and the two ends of each arc segment 102 of the third stator yoke portion region A3 form an included angle X3 with the center of the stator core 10, and 10°≦X3≦20° is satisfied. Specifically, in the structural design of the stator core 10, the arc segments 102 of the respective regions form specific included angle ranges with the center of the stator core 10 according to functional requirements, wherein the included angle X1 of the arc segment 111 of the first stator yoke portion region A1 ranges between 50° and 60°; the included angle X2 of the arc segment 102 of the second stator yoke portion region A2 ranges between 90° and 100°; and the included angle X3 of the arc segment 102 of the third stator yoke portion region A3 ranges between 10° and 20°. In addition, the included angle X1 of the arc segment 102 of the first stator yoke portion region A1, the included angle X2 of the arc segment 102 of the second stator yoke portion region A2, and the included angle X3 of the arc segment 102 of the third stator yoke portion region A3 can be adjusted according to production or design requirements in other embodiments, to meet the requirements of different application scenarios, to ensure that the product adapts to diversified use requirements and performance optimization goals (such as Figure 3 indicated).

[0037] Further, the stator structure 1 further comprises a plurality of stator teeth 105, which are respectively connected to the first stator yoke area A1, the second stator yoke area A2 and the third stator yoke area A3 of the stator core 10 and are arranged at the inner side of the stator core 10 along the circumferential direction (i.e., the stator teeth 105 extend along the radial direction of the stator core 10), and each two adjacent stator teeth 105 define a stator slot 106 therebetween, and the number of the stator teeth 105 is the same as that of the stator slots 106. In this embodiment, the number of the stator teeth 105 and the stator slots 106 is at least 4, and in the inventive illustration, the number of the stator slots 106 is 9, i.e., the stator structure 1 is a 9-slot stator structure. However, the number of the stator teeth 105 and the stator slots 106 is not fixed, and the designer can adjust the number of the stator teeth 105 and the stator slots 106 according to the requirements to adapt to different design requirements.

[0038] In the foregoing, in the design of the stator structure 1, the number of the stator teeth 105 and the stator slots 106 is 9. Among them, the first stator yoke area A1 is configured with 2 stator slots 106, the second stator yoke area A2 is configured with 3 stator slots 106, and each third stator yoke area A3 is configured with 1 stator slot 106. Such a configuration achieves a reasonable distribution of the stator slots 106 in each area. At the same time, this design can also be adjusted as needed to adapt to different application occasions and design requirements.

[0039] In this embodiment, the included angle X1 of the arc segment 102 defining the first stator yoke area A1, the included angle X2 of the arc segment 102 defining the second stator yoke area A2, and the included angle X3 of the arc segment 102 defining the third stator yoke area A3 are different, so that the arc lengths of the arc segments 102 of the stator yoke areas are not equal, i.e., the asymmetric outer edge design, i.e., the asymmetric adjustment of the outer shape of the stator, changes the mass and stiffness distribution, achieves vibration mode reinforcement, and has a good vibration noise suppression effect. By increasing the natural frequency of the stator, the vibration energy of the compressor motor during operation is avoided to be amplified by structural resonance, thereby reducing noise transmission.

[0040] Second embodiment

[0041] In this embodiment, the center points of the concave sections 104 of the straight line sections 103 on both sides of the arc section 102 form an angle (θ1, θ2) with the center of the stator core 10. The stator core 10 is divided into three first stator yoke sections A1 and three second stator yoke sections A2 with the shaft hole 101 as the center. The first stator yoke sections A1 and the second stator yoke sections A2 are alternately arranged along the circumferential direction. Specifically, the shaft hole 101 of the stator core 10 is taken as the center and divided into three first stator yoke sections A1 and three second stator yoke sections A2 along the circumferential direction. These sections are arranged in a specific order along the circumferential direction, which is: first stator yoke section A1, second stator yoke section A2, first stator yoke section A1, second stator yoke section A2, first stator yoke section A1, and second stator yoke section A2. In addition, the designer can adjust the arrangement order of these sections according to the production or design requirements to adapt to different application requirements or design schemes.

[0042] In the foregoing, the angle of the first stator yoke section A1 is θ1, which satisfies 70°≦θ1≦90°; and the angle of the second stator yoke section A2 is θ2, which satisfies 30°≦θ2≦50°. Specifically, in the structural design of the stator core 10, the angles (θ1, θ2) of the stator yoke sections are planned according to the functional requirements. The angle θ1 of the first stator yoke section A1 ranges between 70° and 90°; the angle θ2 of the second stator yoke section A2 ranges between 110° and 130°; and the sum of the angles (θ1, θ2) must be equal to 360°. In this embodiment, the angle θ1 of the first stator yoke section A1 is 80°, and the angle θ2 of the second stator yoke section A2 is 40°. The angle θ1 of the first stator yoke section A1 and the angle θ2 of the second stator yoke section A2 in other embodiments can be adjusted according to the production or design requirements to meet the requirements of different application scenarios, so as to ensure that the product adapts to diversified use requirements and performance optimization goals (such as Figure 4

[0043] ​Furthermore, the two ends of the arc segment 102 of each first stator yoke portion region A1 form an angle X1 with the center of the stator core 10, satisfying 50°≦X1≦60°; the two ends of the arc segment 102 of the second stator yoke portion region A2 form an angle X2 with the center of the stator core 10, satisfying 10°≦X2≦20°. Specifically, in the structural design of the stator core 10, the arc segment 102 of each region forms a specific angle range with the center of the stator core 10 according to functional requirements, wherein the angle X1 of the arc segment 111 of the first stator yoke portion region A1 ranges from 50° to 60°; the angle X2 of the arc segment 102 of the second stator yoke portion region A2 ranges from 10° to 20°. In addition, the angle X1 of the arc segment 102 of the first stator yoke portion region A1 and the angle X2 of the arc segment 102 of the second stator yoke portion region A2 can be adjusted according to production or design requirements in other embodiments to meet the requirements of different application scenarios, to ensure that the product meets the diversified use requirements and performance optimization goals (such as Figure 5 indicated).

[0044] Furthermore, the stator structure 1 further includes a plurality of stator teeth 105, which are respectively connected to the first stator yoke portion region A1 and the second stator yoke portion region A2 of the stator core 10 and are arranged on the inner side thereof in the circumferential direction (i.e., the stator teeth 105 extend in the radial direction of the stator core 10), and each two adjacent stator teeth 105 define a stator slot 106, and the number of stator teeth 105 and stator slots 106 is the same. In this embodiment, the number of stator teeth 105 and stator slots 106 is at least 4, and the number of stator slots 106 in the inventive illustration is 9, i.e., a 9-slot stator structure 1. However, the number of stator teeth 105 and stator slots 106 is not fixed, and the designer can adjust the number of stator teeth 105 and stator slots 106 according to requirements to adapt to different design requirements.

[0045] In the foregoing, the number of stator teeth 105 and stator slots 106 in the design of the stator structure 1 is 9. Among them, each first stator yoke portion region A1 is configured with 2 stator slots 106, and each second stator yoke portion region A2 is configured with 1 stator slot 106, which realizes the reasonable distribution of the stator slots 106 in each region. At the same time, this design can also be appropriately adjusted according to requirements to adapt to different application scenarios and design requirements.

[0046] In this embodiment, each of the first stator yoke regions A1 is configured with two stator slots 106, while each of the second stator yoke regions A2 is configured with one stator slot 106. This configuration achieves a reasonable distribution of the stator slots 106 in each stator yoke region, which is a special slot configuration. The symmetry of the number of stator slots 106 is set to 1 / 3 of the total number of stator slots 106, making the structure of each stator yoke region more rigid, achieving overall structural reinforcement, and simultaneously reducing vibration and noise. Therefore, this special slot configuration not only improves the electromagnetic performance and structural strength of the compressor motor, but also effectively reduces vibration and noise, thereby achieving better operational stability and durability, and improving overall operational stability.

[0047] In summary, through the design of the above technical solution, the natural frequency of the stator structure 1 is increased, which can effectively suppress the transmission of shock waves generated by the operation of the compressor motor, reduce the possibility of structural resonance, and thus improve the noise problem in the mid-to-low frequency range. This design not only reduces sound interference during motor operation and improves the listening experience, but also avoids the negative impact on the efficiency of the compressor motor caused by structural changes. It is suitable for household appliances such as air conditioners, dehumidifiers, and clothes dryers, meeting the market demand for high-efficiency and low-noise products, and is of great significance for enhancing the market competitiveness of products.

[0048] To effectively reduce low- and mid-frequency noise of the compressor motor and improve listening experience while maintaining stable efficiency, this invention optimizes the stator structure 1 design, giving it specific structural parameters and shape characteristics to enhance the stator's natural frequency and suppress vibration wave transmission during operation. The outer diameter D of the stator core 10 is limited to no more than 126 mm, and the ratio of the outer diameter D to the thickness T must meet the requirement of 1.55 ≤ D / T ≤ 3.65. This design range ensures that the compressor motor operates stably while maintaining good rigidity and structural characteristics.

[0049] Under these structural constraints, the stator structure 1 of this invention employs two feasible design methods to effectively increase the natural frequency of the compressor motor stator and reduce vibration noise. The first embodiment adjusts the included angles (θ1, θ2, θ3) of the arc segments 102 of the first stator yoke region A1, the second stator yoke region A2, and the third stator yoke region A3, resulting in different arc lengths and an asymmetrical outer edge design. This alters the mass and rigidity distribution, achieving vibration mode reinforcement, thereby increasing the stator's natural frequency and preventing the amplification of vibration energy due to structural resonance during compressor motor operation, thus reducing noise transmission. The second embodiment utilizes a special slot configuration, with each first stator yoke region A1 having two stator slots and each second stator yoke region A2 having one stator slot 106. The symmetrical number of stator slots 106 is set to 1 / 3 of the total number, enhancing the structural rigidity of each stator yoke region, further strengthening the overall structure and reducing vibration and noise. Therefore, these two design approaches not only improve the electromagnetic performance and structural strength of the compressor motor, but also effectively suppress vibration wave transmission during operation, reducing low-to-mid-frequency noise caused by structural resonance. This improved design effectively suppresses vibration and noise, while ensuring stable compressor motor efficiency without affecting its energy efficiency and output performance, thus achieving superior operating quality.

[0050] The beneficial effects of this work are as follows:

[0051] This invention features a stator structure design with specific structural parameters and shape characteristics to effectively improve the low-to-mid-frequency noise of the compressor motor and enhance listening experience, while maintaining stable compressor motor efficiency. The outer diameter of the stator core is no more than 126mm, and the ratio of the outer diameter to the height of the stator core must conform to the range of 1.55≦D / T≦3.65, where D is the outer diameter of the stator core and T is the thickness of the stator core. Under these structural constraints, the outer edge shape of the stator structure adopts an asymmetrical design, or the symmetry number is set to 1 / 3 of the number of stator slots, to effectively increase the natural frequency of the stator. Through this technical solution, the natural frequency of the stator structure is enhanced, effectively suppressing the transmission of vibration waves generated by the operation of the compressor motor, reducing the possibility of structural resonance, and thus improving noise problems in the low-to-mid-frequency range.

[0052] The above description is merely an embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Any simple equivalent changes and modifications made in accordance with the claims and patent specification of this utility model shall still fall within the scope of this utility model patent.

Claims

1. A stator structure for a compressor motor, comprising a stator core, wherein a shaft hole is provided at the center of the stator core, the shaft hole extending through both ends of the stator core, characterized in that: The outer contour of the stator core includes multiple arc segments and multiple straight segments. An arc segment is adjacent to two straight segments. Each straight segment has a recessed section extending axially along the stator core. The outer diameter of the stator core is D, and the thickness of the stator core is T, satisfying the following relationship: 1.55≦D / T≦3.65, and D≦126mm; while these arc segments are distributed on the same circumference, and the arc lengths of these arc segments are not completely equal.

2. The stator structure applied to a compressor motor as described in claim 1, characterized in that, The center points of the concave sections of the straight sections on both sides of the arc segment form an angle with the center of the stator core, so that the stator core is divided into two first stator yoke regions, one second stator yoke region and two third stator yoke regions in sequence along the circumference with the shaft hole as the center.

3. The stator structure applied to a compressor motor as described in claim 2, characterized in that, The included angle of the first stator yoke region is θ1, which satisfies 70°≦θ1≦90°; the included angle of the second stator yoke region is θ2, which satisfies 110°≦θ2≦130°; and the included angle of the third stator yoke region is θ3, which satisfies 30°≦θ3≦50°.

4. The stator structure applied to a compressor motor as described in claim 2, characterized in that, The two ends of the arc segment of each of the first stator yoke regions form an angle X1 with the center of the stator core, satisfying 50°≦X1≦60°; the two ends of the arc segment of the second stator yoke region form an angle X2 with the center of the stator core, satisfying 90°≦X2≦100°; and the two ends of the arc segment of each of the third stator yoke regions form an angle X3 with the center of the stator core, satisfying 10°≦X3≦20°.

5. The stator structure applied to a compressor motor as described in claim 3, characterized in that, The stator further includes a plurality of stator teeth, which are respectively connected to the first stator yoke region, the second stator yoke region and the third stator yoke region of the stator core and are arranged at intervals along the circumferential direction and located on their inner side, with a stator slot defined between each pair of adjacent stator teeth.

6. The stator structure applied to a compressor motor as described in claim 5, characterized in that, The number of stator teeth and stator slots is 9 each, while each of the first stator yoke regions has 2 stator slots, each of the second stator yoke regions has 3 stator slots, and each of the third stator yoke regions has 1 stator slot.

7. The stator structure applied to a compressor motor as described in claim 1, characterized in that, The center point of each concave segment of the straight segment on both sides of the arc segment forms an angle with the center of the stator core, so that the stator core is divided into three first stator yoke regions and three second stator yoke regions with the shaft hole as the center. The first stator yoke regions and the second stator yoke regions are arranged alternately along the circumference.

8. The stator structure applied to a compressor motor as described in claim 7, characterized in that, The included angle of the first stator yoke region is θ1, which satisfies 70°≦θ1≦90°; the included angle of the second stator yoke region is θ2, which satisfies 30°≦θ2≦50°.

9. The stator structure applied to a compressor motor as described in claim 7, characterized in that, The two ends of the arc segment of the first stator yoke region form an angle X1 with the center of the stator core, satisfying 50°≦X1≦60°; the two ends of the arc segment of the second stator yoke region form an angle X2 with the center of the stator core, satisfying 10°≦X2≦20°.

10. The stator structure applied to a compressor motor as described in claim 8, characterized in that, The stator further includes a plurality of stator teeth, which are respectively connected to the first stator yoke region and the second stator yoke region of the stator core and are arranged at intervals along the circumferential direction and located on their inner side, with a stator slot defined between each pair of adjacent stator teeth.

11. The stator structure for a compressor motor as described in claim 10, characterized in that, The number of stator teeth and stator slots is 9 each, while each of the first stator yoke regions has 2 stator slots and each of the second stator yoke regions has 1 stator slot.

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