Motor, rotary compressor and refrigeration apparatus

Abstract

Disclosed in the embodiments of the present invention are a motor, a rotary compressor and a refrigeration apparatus. A stator core comprises a yoke portion and a plurality of tooth portions, the plurality of tooth portions being spaced apart in the circumferential direction of the yoke portion, each two adjacent tooth portions and the yoke portion together defining a stator slot, and a stator winding being provided in each stator slot. The maximum distance between the outer wall of the yoke portion and the center of the stator is R1, the maximum distance between the bottom of the stator slot and the center of the stator is R2, the number of the stator slots is Q, and the number of poles of the rotor is P, satisfying: 26≤[Formula I]≤86.

Description

Electric machine, rotary compressor and refrigeration equipment

[0001] Cross-reference to related applications

[0002] The present application is based on Chinese Patent Application No. 202411063221.3, filed on August 2, 2024, in the name of Anhui Meishih Precision Manufacturing Co., Ltd., entitled "Electric machine, rotary compressor and refrigeration equipment", 202421873903.6, filed on August 2, 2024, in the name of Anhui Meishih Precision Manufacturing Co., Ltd., entitled "Electric machine, rotary compressor and refrigeration equipment", and claims priority to the above-mentioned Chinese Patent Applications, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of industry, in particular to an electric machine, a rotary compressor and a refrigeration equipment. BACKGROUND

[0004] As an important device for converting electrical energy into mechanical energy, electric machines play a key role in many fields such as rotary compressors, refrigeration equipment and household appliances. An electric machine mainly consists of a stator assembly and a rotor assembly. The electric machine can generate a rotating magnetic field through the current flowing in the stator winding, which can then interact with the rotor magnet in the rotor assembly to generate a rotating torque. However, the existing electric machines have low structural strength and generate noise during operation, resulting in short service life, poor reliability and affecting user experience, which needs to be improved. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an electric machine, which can improve the structural strength of the electric machine, ensure the operation reliability of the electric machine, prolong the service life of the electric machine, and reduce the noise generated during operation of the electric machine, thereby improving the user experience.

[0006] The electric machine according to an embodiment of the present application comprises: a rotor; a stator, the rotor being installed in the stator, the stator comprising a stator core and a stator winding, the stator core comprising a yoke portion and a plurality of tooth portions, the yoke portion being configured in a ring shape, the plurality of tooth portions being distributed in a circumferential direction of the yoke portion, and each two adjacent tooth portions and the yoke portion defining a stator slot together, the stator winding being arranged in the stator slot; wherein the maximum distance between the outer wall of the yoke portion and the center of the stator is R1, the maximum distance between the bottom of the stator slot and the center of the stator is R2, the number of the stator slots is Q, the number of poles of the rotor is P, GCD(Q, P) is the greatest common divisor of Q and P, and satisfies: 26≤ ≤86.

[0007] According to the motor of the embodiments of the present application, the maximum distance R1 of the outer wall of the yoke part from the center of the stator, the maximum distance R2 of the bottom of the stator slot from the center of the stator, the number Q of the stator slots and the number P of the poles of the rotor are set to satisfy: 26≤R1 / R2≤86, thereby improving the structural strength of the motor, ensuring the reliability of the motor operation, prolonging the service life of the motor, reducing the noise generated during the operation of the motor, improving the user experience, and being better in use effect and wider in application range. ≤86, thereby improving the structural strength of the motor, ensuring the reliability of the motor operation, prolonging the service life of the motor, reducing the noise generated during the operation of the motor, improving the user experience, and being better in use effect and wider in application range.

[0008] According to the motor of some embodiments of the present application, it satisfies: 26≤R1 / R2≤66. ≤66.

[0009] According to the motor of some embodiments of the present application, it satisfies: 32≤R1 / R2≤46. ≤46.

[0010] According to the motor of some embodiments of the present application, the minimum distance between two adjacent stator slots is L1, and it satisfies: 0.3≤L1 / R1≤3. ≤3.

[0011] According to the motor of some embodiments of the present application, it satisfies: 0.5≤L1 / R2≤0.7. ≤0.7.

[0012] According to the motor of some embodiments of the present application, the minimum distance between the inner end of the tooth part and the center of the stator is R3, and it satisfies: 0.4≤R3 / R1≤0.7. ≤0.7.

[0013] According to the motor of some embodiments of the present application, it satisfies: 0.6≤R3 / R2≤0.65. ≤0.65.

[0014] According to the motor of some embodiments of the present application, it satisfies: 24mm≤R3≤40mm.

[0015] According to the motor of some embodiments of the present application, it satisfies: 15≤Q≤18; and / or, it satisfies: 10≤P≤12.

[0016] According to the motor of some embodiments of the present application, the number of slots per pole per phase is q, and the number of phases of the motor is m; wherein q=Q / mP, and it satisfies: 0

[0017] According to the motor of some embodiments of the present application, the greatest common divisor of the number Q of the stator slots and the number P of the poles of the rotor is GCD(Q, P), and it satisfies: 5≤GCD(Q, P)≤6.

[0018] The present application also provides a rotary compressor.

[0019] A rotary compressor according to an embodiment of this application includes a pump body component and a motor as described in any of the preceding claims. The rotor includes a rotor core. The pump body component includes a crankshaft, a first bearing, a second bearing, and a cylinder. One end of the crankshaft is connected to the rotor core, and the other end of the crankshaft passes sequentially through the first bearing, the cylinder, and the second bearing. The other end of the crankshaft is connected to an eccentric component within the cylinder. The distance H between the contact surface of the first bearing and the cylinder and the side of the rotor core facing the first bearing satisfies: 0.08 ≤ ≤0.43.

[0020] The rotary compressor according to some embodiments of this application satisfies: 0.14 ≤ ≤0.16.

[0021] The rotary compressor according to some embodiments of this application satisfies: 5mm≤R1-R2≤13mm.

[0022] This application also proposes a refrigeration device.

[0023] The refrigeration equipment according to the embodiments of this application includes the motor or the rotary compressor described in any of the above claims.

[0024] The refrigeration equipment, the rotary compressor, and the aforementioned motor all have the same advantages over the prior art, which will not be elaborated further here.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic diagram of the stator structure according to an embodiment of this application;

[0028] Figure 2 is a schematic diagram of the stator structure according to an embodiment of this application;

[0029] Figure 3 is a schematic diagram of the stator structure according to an embodiment of this application;

[0030] Figure 4 is a schematic diagram of the structure of a motor according to an embodiment of this application;

[0031] Figure 5 is a schematic diagram of the pump body components and rotor according to an embodiment of this application;

[0032] Figure 6 is a schematic diagram of the pump body components and rotor according to an embodiment of this application;

[0033] FIG. 7 is a structural schematic diagram of a rotary compressor according to an embodiment of the present application;

[0034] FIG. 8 is a curve diagram of noise according to an embodiment of the present application;

[0035] FIG. 9 is a curve diagram of rigidity 1 according to an embodiment of the present application;

[0036] FIG. 10 is a curve diagram of rigidity 2 according to an embodiment of the present application;

[0037] FIG. 11 is a curve diagram of rigidity 3 according to an embodiment of the present application.

[0038] Reference numerals:

[0039] Rotary compressor 100,

[0040] Pump body part 1, crankshaft 11, first bearing 12, second bearing 13, cylinder 14,

[0041] Motor 2, rotor 3, rotor core 31, rotor magnet 32, stator 4, stator core 41, yoke part 411, tooth part 412, stator slot 413, stator winding 42, housing 5, accumulator 6. Embodiment of the present application

[0042] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. In the following description, same or similar components have same or similar numbers, and repeated description thereof is omitted. Embodiments described below are examples in which reference signs used in the specification are shown in the drawings. Therefore, the embodiments described below are merely examples for explaining the present application and should not be understood as limiting the present application.

[0043] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are used only to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] The motor 2 according to the embodiments of the present application is described below with reference to FIGS. 1-11, which can improve the structural strength of the motor 2, ensure the operation reliability of the motor 2, prolong the service life of the motor 2, and reduce the noise generated during the operation of the motor 2, thereby improving the user experience.

[0046] As shown in FIGS. 1-11, the motor 2 according to an embodiment of the present application comprises a rotor 3 and a stator 4.

[0047] The rotor 3 is mounted in the stator 4, and the stator 4 comprises a stator core 41 and a stator winding 42. The stator core 41 comprises a yoke portion 411 and a plurality of tooth portions 412. The yoke portion 411 is configured in a ring shape, and the plurality of tooth portions 412 are distributed in a circumferential direction of the yoke portion 411. Adjacent two tooth portions 412 together define a stator slot 413 with the yoke portion 411. The stator winding 42 is arranged in the stator slot 413. In the motor 2, the maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 is R1, the maximum distance between the bottom of the stator slot 413 and the center of the stator 4 is R2, the number of stator slots 413 is Q, and the number of poles of the rotor 3 is P, and the following conditions are satisfied: 26≤P / Q≤86.

[0048] The motor 2 is commonly known as "motor", which refers to an electromagnetic device that converts or transmits electric energy according to the electromagnetic induction law. The motor 2 can be divided into electric motor and generator, etc., and can be applied to rotary compressor 100, refrigeration equipment, household appliances, etc., with high flexibility, and can meet different use requirements.

[0049] Specifically, the motor 2 is provided with the rotor 3 and the stator 4. The stator 4 is provided in a hollow structure, and the rotor 3 can be mounted in the stator 4. The rotor 3 and the stator 4 can work cooperatively to realize the operation of the motor 2. The stator 4 is provided with the stator core 41 and the stator winding 42. The stator core 41 can be used to enhance electromagnetic induction and concentrate electromagnetic field. The stator winding 42 refers to copper wire wound on the stator 4. The stator winding 42 is collectively referred to as a phase or an entire electromagnetic circuit composed of a plurality of coils or coil groups. When the motor 2 operates, the stator 4 generates a magnetic field through current to interact with the magnetic field of the rotating rotor 3 to generate torque, thereby driving the motor 2 to operate. During the operation of the motor 2, the stator 4 is fixed, and the rotor 3 participates in the rotation of the motor 2. ​

[0050] In addition, the stator core 41 is provided in a cylindrical shape, and the stator core 41 is provided with a yoke portion 411 and a plurality of tooth portions 412. The yoke portion 411 is provided in a ring structure, and the plurality of tooth portions 412 are spaced apart from the inner circumferential wall of the yoke portion 411 and extend towards the center of the yoke portion 411. The spacing between adjacent tooth portions 412 is equal, and the adjacent tooth portions 412 and the inner circumferential wall of the yoke portion 411 jointly define a stator slot 413. The stator slot 413 is also formed in a plurality of openings towards the center of the yoke portion 411. The rotor 3 is installed in the stator 4, i.e. the plurality of stator slots 413 are provided in openings towards the rotor 3. The stator winding 42 can be provided in the plurality of stator slots 413, thereby enabling the stator 4 and the rotor 3 to operate together and ensuring the reliability of the motor 2.

[0051] The stator 4 is provided in a cylindrical shape, has a center, and the yoke portion 411 is provided at the outermost side of the stator 4. The maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 can be set as R1, unit: mm, i.e. the maximum radius of the stator 4 is set as R1. The inner side of the yoke portion 411 is connected to a plurality of tooth portions 412. Adjacent tooth portions 412 form a stator slot 413 therebetween, and the number of stator slots 413 is Q. The distance between the bottom of the stator slot 413 and the center can be set as R2, unit: mm. The number of poles of the rotor 3 can be set as P, and satisfies: 26≤ ≤86, i.e. The number of P can be set as 26, 56 or 86, etc. The number of poles of the rotor 3 refers to the number of magnetic poles of each phase coil uniformly distributed in the circumference of the stator 4. The more the number of poles, the lower the speed.

[0052] In addition, GCD(Q, P) is the greatest common divisor between the number of stator slots 413 and the number of poles of the rotor 3, and GCD(Q, P)4 is proportional to the force and vibration of the motor 2, and inversely proportional to the vibration amplitude, i.e. the greater the GCD(Q, P)4, the better the vibration noise of the motor 2, i.e. the smaller the noise generated by the motor 2 during operation. 2×R1 is the maximum diameter of the stator 4, and R1-R2 refers to the maximum thickness of the yoke portion 411. The minimum value of R1-R2 is limited by the electrical safety distance, and the greater the R1-R2, the greater the maximum thickness of the yoke portion 411, thereby making the rigidity of the motor 2 greater, which can reduce the noise generated by the motor 2 during rotation. The maximum value of R1-R2 is limited by the size of the stator slot 413. The smaller the area of the stator slot 413, the smaller the number of turns of the stator winding 42 that can be accommodated in the stator slot 413, thereby causing the temperature to rise during operation of the motor 2, the efficiency of the motor 2 to decrease, etc. R1, R2, Q and P are set to satisfy: 26≤ With a value of ≤86, the motor 2 can not only operate normally, but also improve its structural strength, thereby ensuring its operational reliability, extending its service life, reducing the noise generated during operation, and improving the user experience.

[0053] As shown in Figures 1-3, the yoke 411 is configured as a ring structure and is located on the outermost side of the stator core 41. R1 is the maximum distance between the outer wall of the yoke 411 and the center of the stator 4. In actual configuration, the outer peripheral wall of the yoke can be configured as a complete circle as shown in Figure 1, or as a groove structure with inward concavity as shown in Figures 2-3. When measuring R1, the farthest distance between the outer peripheral wall of the yoke 411 and the center of the stator 4 should be measured.

[0054] According to the embodiment of the present application, the motor 2 is configured such that the maximum distance R1 between the outer wall of the yoke 411 and the center of the stator 4, the maximum distance R2 between the bottom of the stator slot 413 and the center of the stator 4, the number Q of the stator slots 413, and the number of poles P of the rotor 3 are set to satisfy: 26 ≤ With a value of ≤86, the structural strength of motor 2 can be improved, the operational reliability of motor 2 can be guaranteed, the service life of motor 2 can be extended, the noise generated during operation of motor 2 can be reduced, and the user experience can be improved, resulting in better performance and wider applicability.

[0055] In some embodiments, the following condition is satisfied: 26≤ ≤66.

[0056] Specifically, the maximum distance between the outer wall of the yoke 411 and the center of the stator 4 can be set to R1, in mm. Stator slots 413 are formed between adjacent teeth 412, and the number of stator slots 413 is Q. The farthest distance between the bottom of the stator slots 413 and the center can be set to R2, in mm. The number of poles of the rotor 3 can be set to P, and satisfies: 26 ≤ ≤66, that is The value can be set to 26, 46, or 66, etc.

[0057] Additionally, as shown in Figure 8 The graph shows the relationship between the noise level and the input noise level. As can be seen from the graph, when... When the value is less than or equal to 66 and greater than or equal to 26, the corresponding noise value is low. That is, R1, R2, Q, and P are set to satisfy: 26 ≤ With a value of ≤66, the motor 2 can not only be guaranteed to operate normally, but also further improve the structural strength of the motor 2, thereby ensuring the reliability of the motor 2, extending the service life of the motor 2, and further reducing the noise generated by the motor 2 during operation, thus improving the user experience.

[0058] In some embodiments, the following condition is satisfied: 32≤ ≤ 46.

[0059] Specifically, the maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 can be set as R1, in units of mm, the stator slots 413 are formed between the adjacent tooth portions 412, and the number of the stator slots 413 is Q, the farthest distance between the bottoms of the stator slots 413 and the center is set as R2, in units of mm, the number of poles of the rotor 3 is set as P, and the following is satisfied: 32≤ ≤ 46, that is, The value of R1 / R2 can be set as 32, 39, or 46, etc.

[0060] In addition, as shown in FIG. 8, it is a curve diagram between R1 / R2 and the noise value, and it can be known from the curve diagram that when the value of R1 / R2 is less than or equal to 46 and greater than or equal to 32, the corresponding noise value is located at the lower point of the curve, that is, the noise value is smaller in the above range, so that R1, R2, Q, and P are set to satisfy: 32≤ ≤ 46, which can further improve the structural strength of the motor 2 while ensuring normal operation of the motor 2, thereby ensuring the operation reliability of the motor 2, prolonging the service life of the motor 2, and further reducing the noise generated during operation of the motor 2, improving the user experience. In some embodiments, the minimum distance between the adjacent two stator slots 413 is L1, and the following is satisfied: 0.3≤ ≤ 3.

[0061] Specifically, the plurality of tooth portions 412 are spaced apart from the inner peripheral wall of the yoke portion 411, and the stator slots 413 are defined between the adjacent tooth portions 412, that is, the stator slots 413 are also formed in plurality, the adjacent stator slots 413 are spaced apart by a single tooth portion 412, and the minimum distance between the adjacent stator slots 413 is set as L1, in units of mm, that is, the minimum thickness of the tooth portion 412 between the adjacent two stator slots 413 is L1, the maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 can be set as R1, in units of mm, the farthest distance between the bottoms of the stator slots 413 and the center can be set as R2, in units of mm, R1-R2 refers to the maximum thickness of the yoke portion 411, and L1, R1, and R2 satisfy: 0.3≤ ≤ 3, that is,

[0062] The value of L1 / R2 can be set as 0.3, 1.8, or 3, etc.

[0063] ​​In addition, the motor 2 generates radial force during operation, which can be transmitted outward through the teeth 412. The minimum thickness of the teeth 412 between two adjacent stator slots 413 is L1. The larger the value of L1, the greater the structural strength of the teeth 412, thus avoiding deformation of the teeth 412 when the radial force is transmitted through it, ensuring the operational reliability of the teeth 412. The minimum thickness L1 of the teeth 412 is also limited by the size of the stator slots 413. The smaller the stator slots 413, the lower the efficiency of the motor 2 and the lower its reliability. Therefore, L1, R1, and R2 are set to satisfy: 0.3 ≤ ≤3 can ensure the structural strength of the tooth section 412 and extend the service life of the stator 4 while guaranteeing the efficiency and operational reliability of the motor 2.

[0064] In some embodiments, the following condition is satisfied: 0.5 ≤ ≤0.7.

[0065] Specifically, stator slots 413 are formed between adjacent teeth 412, and the minimum distance between two adjacent stator slots 413 is set to L1 (mm). The maximum distance between the outer wall of the yoke 411 and the center of the stator 4 can be set to R1 (mm). The farthest distance between the bottom of the stator slot 413 and the center can be set to R2 (mm), and all of the above satisfy: 0.5 ≤ ≤0.7, that is The value can be set to 0.5, 0.6, or 0.7, etc.

[0066] Additionally, as shown in Figure 10 The curve diagram shows the relationship between the value of stiffness and the value of rigidity. From the curve diagram, it can be seen that when... When the value is less than or equal to 0.7 and greater than or equal to 0.5, the corresponding stiffness value is located at the higher point of the curve, that is, the stiffness is relatively large within the above range, so setting L1, R1, and R2 to satisfy: 0.5 ≤ With a value of ≤0.7, the structural strength of the tooth 412 can be further guaranteed while ensuring the efficiency and operational reliability of the motor 2. This can further reduce the noise generated by radial vibration and extend the service life of the stator 4.

[0067] in, To constrain the ratio of R1-R2 to L1, the electromagnetic force of motor 2 is generated by the interaction between the permanent magnet magnetic field of rotor 3 and the armature magnetic field generated by the energization of stator winding 42 in the air gap between rotor 3 and stator 4. The radial electromagnetic force is directly transmitted from the tooth 412 near the air gap to the yoke 411. Increasing the width of tooth 412 can also enhance the rigidity at this point and reduce vibration and noise. However, increasing the width of tooth 412 will reduce the area of ​​stator slot 413, further reduce the amount of enameled wire used, increase electrical density, and ultimately lead to serious overheating of motor 2 and decreased efficiency of motor 2. Therefore, L1 needs to be limited to a certain range.

[0068] In some embodiments, the minimum distance between the inner end of the tooth 412 and the center of the stator 4 is R3, and satisfies: 0.4 ≤ ≤0.7.

[0069] Specifically, as shown in Figures 1-4, multiple teeth 412 are spaced apart and connected to the inner peripheral wall of the yoke 411, and all teeth 412 extend radially toward the center of the stator 4, such that each tooth 412 has an inner end close to the center of the stator 4. The minimum distance between the inner end of the tooth 412 and the center is set to R3 (mm), and the maximum distance between the outer wall of the yoke 411 and the center of the stator 4 can be set to R1 (mm), where R3 and R1 satisfy: 0.4 ≤ ≤0.7, that is The value can be set to 0.4, 0.6, or 0.7, etc.

[0070] Furthermore, the minimum distance between the inner end of the tooth 412 and the center is set to R3, which means the inner diameter of the stator 4 is set to R3. Setting the inner diameter of the stator 4 too large will result in the stator slot 413 being too small, thus affecting the operating efficiency of the motor 2. Setting the inner diameter of the stator 4 too small will result in the rotor 3 inside the stator 4 being too large. Therefore, R1 and R3 are set to satisfy: 0.4 ≤ With a value of ≤0.7, the size of the rotor 3 can be controlled while ensuring the efficiency and operational reliability of the motor 2, thereby reducing the noise generated during the operation of the motor 2 and improving the user experience.

[0071] In some embodiments, the following condition is satisfied: 0.6 ≤ ≤0.65.

[0072] Specifically, the minimum distance between the inner end of the tooth 412 and the center is set to R3 (mm), and the maximum distance between the outer wall of the yoke 411 and the center of the stator 4 can be set to R1 (mm), satisfying: 0.6 ≤ ≤0.65, that is The value can be set to 0.6, 0.62, or 0.65, as shown in Figure 11. The graph shows the relationship between the noise level and the input noise level. As can be seen from the graph, when... When the value is less than or equal to 0.65 and greater than or equal to 0.6, the corresponding noise value is located at the lower point of the curve, meaning that the noise is relatively small within the above range. Therefore, setting R1 and R3 to satisfy: 0.6 ≤ With a value of ≤0.65, the size of the rotor 3 can be controlled while ensuring the efficiency and operational reliability of the motor 2, thereby further reducing the noise generated during the operation of the motor 2 and improving the user experience.

[0073] in, To constrain the ratio of R3 to R1, the maximum distance between the outer wall of the yoke 411 and the center of the stator 4 is limited by the assembly space size of the air conditioning system and the output power level of the motor 2. Noise can be improved by adjusting the ratio of R1 to R3. In addition to reducing the transmission effect of the electromagnetic force generated by the air gap between the stator 4 and the rotor 3 by increasing the width of the tooth 412, the influence of radial electromagnetic force vibration can also be reduced by shortening the length of the tooth 412. The shorter the tooth 412, the smaller the amplitude of the electromagnetic force and the vibration of the tooth 412. However, the tooth 412 cannot be reduced indefinitely. Shortening the length of the tooth 412 will lead to a reduction in the area of ​​the stator slot 413, further reducing the amount of enameled wire used, increasing the electrical density, and ultimately causing serious problems such as overheating of the motor 2 and a decrease in the efficiency of the motor 2. Therefore, limiting the ratio of R3 to R1 can balance noise vibration and efficiency.

[0074] In some embodiments, the following condition is satisfied: 24mm≤R3≤40mm.

[0075] Specifically, the minimum distance between the inner end of the tooth 412 and the center of the circle is set to R3 in mm, which means the inner diameter of the stator 4 is set to R3. R3 is set to satisfy: 24mm≤R3≤40mm, that is, R3 can be set to 24mm, 32mm or 40mm, etc. Setting the inner diameter of the stator 4 too large will result in the stator slot 413 being too small, which will affect the operating efficiency of the motor 2. Setting the inner diameter of the stator 4 too small will result in the rotor 3 inside the stator 4 being too large. Therefore, setting R3 to satisfy: 24mm≤R3≤40mm can control the size of the rotor 3 while ensuring the efficiency and operational reliability of the motor 2, reduce the noise generated by the motor 2 during operation, and improve the user experience.

[0076] In some embodiments, the following conditions are met: 15 ≤ Q ≤ 18; and / or, 10 ≤ P ≤ 12.

[0077] Specifically, the teeth 412 are arranged in a plurality, and the stator slots 413 are formed between adjacent teeth 412, that is, the stator slots 413 are arranged in a plurality, the number of the stator slots 413 can be set as Q, the number of poles of the rotor 3 can be set as P, and the number Q of the stator slots 413 is set to satisfy 15≤Q≤18, that is, the number Q of the stator slots 413 can be set as 15, 16 or 18, and the number P of poles of the rotor 3 is set to satisfy 10≤P≤12, that is, the number P of poles of the rotor 3 can be set as 10, 11 or 12, and in actual setting, the number Q of the stator slots 413 can be limited to satisfy only 15≤Q≤18, or the number P of poles of the rotor 3 can be limited to satisfy only 10≤P≤12, or the number Q of the stator slots 413 is limited to satisfy 15≤Q≤18 and the number P of poles of the rotor 3 is limited to satisfy 10≤P≤12.

[0078] In addition, in the embodiment, the number Q of the stator slots 413 is limited to satisfy 15≤Q≤18, and the number P of poles of the rotor 3 is limited to satisfy 10≤P≤12, limiting the number Q of the stator slots 413 to satisfy 15≤Q≤18 and the number P of poles of the rotor 3 to satisfy 10≤P≤12 can increase the greatest common divisor GCD(Q, P) between the number of the stator slots 413 and the number of poles of the rotor 3, and GCD(Q, P)4 is proportional to the force and vibration of the motor 2 and inversely proportional to the vibration amplitude, that is, the greater GCD(Q, P)4 is, the better the vibration noise of the motor 2 is, and thus the noise generated when the motor 2 operates can be reduced to improve user comfort.

[0079] In some embodiments, the number of slots per pole per phase is q, and the number of phases of the motor 2 is m; wherein q=Q / mP, and satisfies 0

[0080] Specifically, the number of phases of the motor 2 is set as m, which refers to the number of coils in the motor 2, the more the number of coils in the motor 2 is, the higher the number of phases of the motor 2 is, the number of the stator slots 413 can be set as Q, the number of poles of the rotor 3 can be set as P, the number of slots per pole per phase is set as q, and q=Q / mP, that is, the number of slots per pole per phase is proportional to the number of the stator slots 413 and inversely proportional to the product of the number of phases of the motor 2 and the number of poles of the rotor 3, and the number of slots per pole per phase q is set to satisfy 0

[0081] In some embodiments, the greatest common divisor of the number Q of the stator slots 413 and the number P of poles of the rotor 3 is GCD(Q, P), and satisfies 5≤GCD(Q, P)≤6.

[0082] Specifically, the number of the stator slots 413 can be set as Q, the number of poles of the rotor 3 can be set as P, the greatest common divisor of the number of the stator slots Q and the number of poles P is set as GCD(Q, P), and the greatest common divisor GCD(Q, P) of the number of the stator slots Q and the number of poles P is set to satisfy: 5≤GCD(Q, P)≤6, that is, the greatest common divisor GCD(Q, P) of the number of the stator slots Q and the number of poles P can be set as 5 or 6, when the number of the stator slots 413 Q is set as 15 and the number of poles of the rotor 3 is set as 10, the greatest common divisor GCD(Q, P) of the number of the stator slots Q and the number of poles P is 5, when the number of the stator slots 413 Q is set as 18 and the number of poles of the rotor 3 is set as 12, the greatest common divisor GCD(Q, P) of the number of the stator slots Q and the number of poles P is 6, in the embodiment, the number of the stator slots 413 Q is 15 and the number of poles of the rotor 3 is 10, the greatest common divisor GCD(Q, P) of the number of the stator slots Q and the number of poles P is 5, which can ensure the reliability and performance of the motor 2, and can reduce the noise generated by the operation of the motor 2, and improve the user's comfort.

[0083] In some embodiments, it is satisfied that: 45mm≤R1≤70mm.

[0084] Specifically, the stator 4 is set as a cylindrical shape with a center, and the yoke part 411 of the stator 4 is arranged at the outermost side of the stator 4, the maximum distance between the outer wall of the yoke part 411 and the center of the stator 4 can be set as R1, unit: mm, that is, the maximum radius of the stator 4 is set as R1, and the maximum distance R1 between the outer wall of the yoke part 411 and the center of the stator 4 can be set to satisfy: 45mm≤R1≤70mm, that is, the maximum distance R1 between the outer wall of the yoke part 411 and the center of the stator 4 can be set as 45mm, 55mm or 70mm, etc.

[0085] In addition, under the condition that other dimensions remain unchanged, the smaller the maximum thickness of the yoke part 411 is, the smaller the maximum thickness of the yoke part 411 is, which leads to the decrease of the reliability of the motor 2, and the larger the maximum thickness of the yoke part 411 is, the larger the rigidity of the motor 2 is, which can reduce the noise generated by the rotation of the motor 2, but the larger the thickness of the yoke part 411 is, the smaller the area of the stator slot 413 is, and the smaller the number of turns of the stator winding 42 that can be accommodated by the stator slot 413 is, which will lead to the increase of the temperature of the motor 2 during operation, the decrease of the efficiency of the motor 2, etc. By setting the maximum distance R1 between the outer wall of the yoke part 411 and the center of the stator 4 to satisfy: 45mm≤R1≤70mm, the structural strength of the motor 2 can be improved while ensuring the normal operation of the motor 2, which can ensure the reliability of the motor 2, prolong the service life of the motor 2, reduce the noise generated by the operation of the motor 2, and improve the user's experience.

[0086] The application also provides a rotary compressor 100.

[0087] The rotary compressor 100 according to the embodiment of the present application comprises the pump body part 1 and the motor 2 of any one of the above, the rotor 3 comprises the rotor core 31, the pump body part 1 comprises the crankshaft 11, the first bearing 12, the second bearing 13 and the cylinder 14, one end of the crankshaft 11 is connected with the rotor core 31, the other end of the crankshaft 11 is sequentially arranged in the first bearing 12, the cylinder 14 and the second bearing 13, and the other end of the crankshaft 11 is connected with the eccentric part in the cylinder 14; wherein the distance between the contact surface of the first bearing 12 matched with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 is H, and satisfies: 0.08≤H≤0.43.

[0088] Specifically, the rotary compressor 100 is a driven fluid machine for lifting low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. The rotary compressor 100 can suck low-temperature and low-pressure refrigerant gas from the suction pipe, and then discharge high-temperature and high-pressure refrigerant gas to the discharge pipe after compression by the piston driven by the motor 2, so as to provide power for the refrigeration cycle. The rotary compressor 100 is provided with a shell 5, a pump body part 1, a motor 2 and a liquid accumulator 6.

[0089] In addition, the rotor 3 is provided with the rotor core 31 and the rotor magnet 32, the motor 2 and the pump body part 1 are arranged in the shell 5, the liquid accumulator 6 is connected with the pump body part 1, the pump body part 1 is provided with the crankshaft 11, the first bearing 12, the second bearing 13 and the cylinder 14, the second bearing 13 is arranged below the pump body part 1, the first bearing 12 is arranged above the pump body part 1, and the cylinder 14 is arranged between the first bearing 12 and the second bearing 13. As shown in FIGS. 5-6, the cylinder 14 can be one or two, etc., and one end of the crankshaft 11 is connected with the rotor core 31, the other end of the crankshaft 11 is sequentially arranged in the first bearing 12, the cylinder 14 and the second bearing 13, and the other end of the crankshaft 11 is connected with the eccentric part in the cylinder 14, so that the crankshaft 11 can drive the rotor 3 to rotate when the crankshaft 11 rotates.

[0090] The distance between the contact surface of the first bearing 12 matched with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 is set as H, the maximum distance between the outer wall of the yoke part 411 and the center of the stator 4 is set as R1, the distance between the inner wall of the stator slot 413 farthest from the center and the center can be set as R2, and H, R1 and R2 satisfy: 0.08≤H≤0.43. The value of H, R1 and R2 can be set as 0.08, 0.3 or 0.43.

[0091] ​​When the distance H between the contact surface of the first bearing 12 matched with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 is too large, that is, the distance between the rotor core 31 and the pump body part 1 is too large, the rotor 3 will swing when the rotor 3 operates, which will cause noise when the motor 2 operates, and a cavity is formed between the rotor core 31 and the pump body part 1, and the air in the cavity will resonate with the yoke part 411 of the stator 4. The greater the resonance, the greater the noise of the motor 2, and thus H, R1 and R2 are set to satisfy: 0.08≤H≤0.43, which can reduce the noise caused by the swing of the rotor 3 and the resonance of the air and the yoke part 411, and improve the user experience. ≤0.43, which can reduce the noise caused by the swing of the rotor 3 and the resonance of the air and the yoke part 411, and improve the user experience.

[0092] According to the rotary compressor 100 of the embodiment of the present application, the maximum distance R1 between the outer wall of the yoke part 411 and the center of the stator 4, the maximum distance R2 between the bottom of the stator slot 413 and the center of the stator 4, the number Q of the stator slots 413 and the number P of poles of the rotor 3 are set to satisfy: 26≤P+Q≤86, which can improve the structural strength of the motor 2, ensure the operation reliability of the motor 2, prolong the service life of the motor 2, reduce the noise generated when the motor 2 operates, and improve the user experience, the use effect is better, the application range is wider. ≤86, which can improve the structural strength of the motor 2, ensure the operation reliability of the motor 2, prolong the service life of the motor 2, reduce the noise generated when the motor 2 operates, and improve the user experience, the use effect is better, the application range is wider.

[0093] In some embodiments, 0.14≤H≤0.16 is satisfied.

[0094] Specifically, the maximum distance between the outer wall of the yoke part 411 and the center of the stator 4 can be set as R1, unit: mm, the maximum distance between the bottom of the stator slot 413 and the center can be set as R2, unit: mm, the distance between the contact surface of the first bearing 12 matched with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 is set as H, unit: mm, and satisfies: 0.14≤H≤0.16, that is, the value of H can be set as 0.14, 0.15 or 0.16, etc.

[0095] In addition, as shown in FIG. 9, it is a curve diagram between and the rigidity value, and from the curve diagram, when the value of H is less than or equal to 0.16 and greater than or equal to 0.14, the corresponding rigidity value is higher, that is, R1, R2 and H are set to satisfy: 0.14≤H≤0.16, which can further improve the structural strength of the motor 2 while ensuring the normal operation of the motor 2, thereby ensuring the operation reliability of the motor 2, prolonging the service life of the motor 2, and further reducing the noise generated when the motor 2 operates, and improving the user experience.

[0096] ​​​​wherein, For the constraint between R1-R2 and H, since the gas compression of the rotary compressor 100 is realized by the eccentric rotation compression of the crankshaft 11, the crankshaft 11 is sleeved with the rotor 3, and in order to balance the unbalance amount caused by the eccentric, different shapes and weights of balance blocks are arranged on the upper and lower end plates of the rotor 3 to adjust the overall balance amount. Since the cavity between the contact surface of the first bearing 12 matched with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 is an asymmetric structure, when the rotor 3 carrying the balance blocks rotates, the gas disturbance in the cavity and the centrifugal force generated by the rotation directly radiate the gas pulsation to the yoke portion 411. Therefore, increasing the height of H can effectively reduce the influence of gas disturbance, but H cannot be infinitely high, because the fixing mode of the rotor 3 with the first bearing 12 and the second bearing 13 is a cantilever beam structure, the larger the cavity space is, the greater the swing amplitude of the rotor 3 will be, which will cause the vibration noise to deteriorate more seriously. Therefore, R1-R2 and H are constrained.

[0097] In some embodiments, 5mm≤R1-R2≤13mm is satisfied.

[0098] Specifically, R1-R2 refers to the maximum thickness of the yoke portion 411, and R1-R2 is set to satisfy 5mm≤R1-R2≤13mm, that is, the value of R1-R2 can be set to 5mm, 8mm or 13mm, etc. The minimum value of R1-R2 is limited by the electrical safety distance, and the greater R1-R2 is, the greater the maximum thickness of the yoke portion 411 is, thereby making the rigidity of the motor 2 greater, which can reduce the noise generated when the motor 2 rotates. The maximum value of R1-R2 is limited by the size of the stator slot 413, and the smaller the area of the stator slot 413 is, the smaller the number of turns of the stator winding 42 that can be accommodated by the stator slot 413 is, thereby causing problems such as temperature rise, efficiency reduction, etc. when the motor 2 operates. By setting R1-R2 to satisfy 5mm≤R1-R2≤13mm, the structural strength of the motor 2 can be improved while ensuring normal operation of the motor 2, thereby ensuring the operation reliability of the motor 2, prolonging the service life of the motor 2, reducing the noise generated when the motor 2 operates, and improving the user experience.

[0099] In some embodiments, 29mm≤H≤72mm is satisfied.

[0100] Specifically, the distance between the contact surface of the first bearing 12 matched with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 is H, in mm, and the distance H is set to satisfy 29mm≤H≤72mm, that is, the distance H can be set to 29mm, 55mm or 72mm, and the distance between the rotor core 31 and the pump body part 1 is the distance H, when H is too large, the rotor 3 will swing when running, which will cause noise when the motor 2 runs, and the distance H is set to satisfy 29mm≤H≤72mm, which can reduce the noise caused by the swing of the rotor 3 and improve the user experience.

[0101] The application further provides a refrigeration equipment.

[0102] The refrigeration equipment according to the embodiments of the application comprises the motor 2 of any one of the above or the rotary compressor 100 of any one of the above.

[0103] The refrigeration equipment according to the embodiments of the application sets the maximum distance R1 between the outer wall of the yoke part 411 and the center of the stator 4, the maximum distance R2 between the bottom of the stator slot 413 and the center of the stator 4, the number Q of the stator slots 413 and the pole number P of the rotor 3 to satisfy 26≤R1+R2+Q+P≤86, which can improve the structural strength of the motor 2, ensure the operation reliability of the motor 2, prolong the service life of the motor 2, reduce the noise generated when the motor 2 runs, improve the user experience, and have better use effect and wider application range.

[0104] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0105] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.​

Claims

1. An electric machine, wherein, Comprising: a rotor; a stator, the rotor being installed in the stator, the stator comprising a stator core and a stator winding, the stator core comprising a yoke portion and a plurality of tooth portions, the yoke portion being configured in a ring shape, the plurality of tooth portions being distributed in a circumferential direction of the yoke portion, two adjacent tooth portions and the yoke portion together defining a stator slot, the stator winding being arranged in the stator slot; Wherein, the maximum distance between the outer wall of the yoke and the center of the stator is R1, the maximum distance between the bottom of the stator slot and the center of the stator is R2, the number of the stator slots is Q, the pole number of the rotor is P, GCD(Q, P) is the greatest common divisor of Q and P, and satisfies: 26≤ ≤86。 2. The electric machine of claim 1, wherein, satisfies: 26 ≤ ≤ 66.

3. The electric machine of claim 1 or 2, wherein, Satisfies: 32 ≤ ≤ 46.

4. The electric machine of any of claims 1-3, wherein, The minimum distance between two adjacent stator slots is L1, and satisfies: 0.3≤ ≤3.

5. The electric machine of claim 4, wherein, satisfies: 0.5 ≤ ≤ 0.

7.

6. The electric machine of any one of claims 1-3, wherein, The minimum distance of the inner end of the tooth portion from the center of the stator is R3, and satisfies: 0.4≤R3 / R1≤0.

7. ≤0.

7.

7. The electric machine of claim 6, wherein, satisfies: 0.6 ≤ ≤ 0.

65.

8. The electric machine of claim 6 or 7, wherein, satisfying: 24mm≤R3≤40mm.

9. The electric machine of any of claims 1-8, wherein, satisfying: 15≤Q≤18; and / or, satisfying: 10≤P≤12.

10. The electric machine of any of claims 1-9, wherein, a number of slots per pole per phase of the electric machine is q, and a number of phases of the electric machine is m; wherein q=Q / mP, and satisfying: 0 11. The electric machine of any of claims 1-10, wherein, a greatest common divisor of the number of stator slots Q and the number of rotor poles P is GCD(Q, P), satisfying: 5≤GCD(Q, P)≤6.

12. A rotary compressor, comprising: comprising a pump body component and the electric machine of any one of claims 1-11, the rotor comprising a rotor core, the pump body component comprising a crankshaft, a first bearing, a second bearing, and a cylinder, one end of the crankshaft being connected to the rotor core, the other end of the crankshaft being sequentially arranged in the first bearing, the cylinder, and the second bearing, the other end of the crankshaft being connected to an eccentric member in the cylinder; wherein a distance between a contact surface of the first bearing that cooperates with the cylinder and a side surface of the rotor core facing the first bearing is H, and 0.08 ≤ H < 0.15 is satisfied. ≤0.43。 13. The rotary compressor of claim 12, wherein, satisfies: 0.14 ≤ ≤ 0.

16.

14. The rotary compressor of claim 12 or 13, wherein, satisfying: 5mm≤R1-R2≤13mm.

15. A refrigeration appliance, wherein, comprising the electric machine of any one of claims 1-11 or the rotary compressor of any one of claims 12-14.

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