Motor, rotary compressor and refrigeration equipment

Abstract

The embodiment of the invention discloses a motor, a rotary compressor and refrigeration equipment, the motor is characterized in that a rotor is mounted in a stator, the stator comprises a stator core and a stator winding, the stator core comprises a yoke part and a plurality of tooth parts, the yoke part is annular, the plurality of tooth parts are distributed in the circumferential direction of the yoke part at intervals, and the stator winding is wound around the yoke part. Two adjacent tooth parts and the yoke part jointly define a stator groove, and the stator winding is arranged in the stator groove; wherein the maximum distance between the outer wall of the yoke part and the circle center of the stator is R1, the maximum distance between the bottom of each stator groove and the circle center of the stator is R2, the number of the stator grooves is Q, and the number of poles of the rotor is P. According to the motor provided by the embodiment of the invention, the structural strength of the motor can be improved, the operation reliability of the motor is ensured, and the service life of the motor is prolonged; the noise generated during the operation of the motor is reduced, the user experience can be improved, the use effect is better, and the application range is wider.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industry, in particular to a motor, a rotary compressor and a refrigeration equipment. BACKGROUND

[0002] As an important device for converting electrical energy into mechanical energy, the motor plays a key role in many fields such as rotary compressors, refrigeration equipment and household appliances. The motor is mainly composed of a stator assembly and a rotor assembly, and the motor can generate a rotating magnetic field through the current flowing in the stator winding, which can interact with the rotor magnet in the rotor assembly to generate a rotating torque. However, the existing motor has low structural strength and generates noise during operation, which shortens the service life, reduces the reliability, and affects the user experience, so there is room for improvement. SUMMARY

[0003] 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 a motor which can improve the structural strength of the motor, ensure the reliability of the motor operation, prolong the service life of the motor, and reduce the noise generated during the operation of the motor, thereby improving the user experience.

[0004] According to the motor of the present application, the maximum distance R1 between the outer wall of the yoke and the center of the stator, the maximum distance R2 between the bottom of the stator slot and 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:

[0005] According to the motor of the present application, the maximum distance R1 between the outer wall of the yoke and the center of the stator, the maximum distance R2 between the bottom of the stator slot and 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: Further, the motor can improve the structural strength, ensure the reliability of the motor operation, prolong the service life of the motor, reduce the noise generated during the operation of the motor, improve the user experience, have better use effect and wider application range.

[0006] According to the motor of the present application, the maximum distance R1 between the outer wall of the yoke and the center of the stator, the maximum distance R2 between the bottom of the stator slot and 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:

[0007] According to the motor of the present application, the maximum distance R1 between the outer wall of the yoke and the center of the stator, the maximum distance R2 between the bottom of the stator slot and 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:

[0008] According to some embodiments of the motor, the minimum distance between two adjacent stator slots is L1, and satisfies:

[0009]

[0010] According to some embodiments of the motor, it satisfies:

[0011] According to some embodiments of the motor, the minimum distance between the inner end of the tooth portion and the center of the stator is R3, and satisfies:

[0012] According to some embodiments of the motor, it satisfies:

[0013] According to some embodiments of the motor, it satisfies: 24mm≤R3≤40mm.

[0014] According to some embodiments of the motor, it satisfies: 15≤Q≤18; and / or, it satisfies: 10≤P≤12.

[0015] According to some embodiments of the motor, 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 satisfies: 0

[0016] According to some embodiments of the motor, the greatest common divisor of the number of stator slots Q and the number of rotor poles P is GCD(Q, P), and satisfies: 5≤GCD(Q, P)≤6.

[0017] The application further provides a rotary compressor.

[0018] According to some embodiments of the rotary compressor, it satisfies:

[0019] According to some embodiments of the rotary compressor, it satisfies:

[0020] According to some embodiments of the rotary compressor, it satisfies: 5mm≤R1-R2≤13mm.

[0021] The application further provides a refrigeration device.

[0022] The refrigeration device according to the embodiment of the application comprises the motor according to any one of the above or the rotary compressor according to any one of the above.

[0023] The refrigeration device, the rotary compressor and the motor according to the above have the same advantages as the prior art, which will not be repeated here.

[0024] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:

[0026] Figure 1 is a structural diagram of a stator according to an embodiment of the application Figure One ;

[0027] Figure 2 is a structural diagram of a stator according to an embodiment of the application Figure Two ;

[0028] Figure 3 is a structural diagram of a stator according to an embodiment of the application Figure Three ;

[0029] Figure 4 is a structural diagram of a motor according to an embodiment of the application

[0030] Figure 5 is a structural diagram of a pump body part and a rotor according to an embodiment of the application Figure One ;

[0031] Figure 6 is a structural diagram of a pump body part and a rotor according to an embodiment of the application Figure Two ;

[0032] Figure 7 is a structural diagram of a rotary compressor according to an embodiment of the application

[0033] Figure 8 is a curve diagram of noise according to an embodiment of the application

[0034] Figure 9 is a curve diagram of rigidity according to an embodiment of the application Figure One ;

[0035] Figure 10 is a curve diagram of rigidity according to an embodiment of the application Figure Two ;

[0036] Figure 11 is a rigid curved profile according to an embodiment of the present invention Figure Three .

[0037] Reference Signs:

[0038] rotary compressor 100,

[0039] pump body part 1, crankshaft 11, first bearing 12, second bearing 13, cylinder 14,

[0040] 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, liquid reservoir 6. DETAILED DESCRIPTION

[0041] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein like or similar elements are denoted by the same or similar reference signs throughout the drawings. The embodiments described below are examples of the present application, which are only used to explain the present application, and should not be understood as limiting the present application.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "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 only used 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, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified and limited, the term "a plurality of" means two or more.

[0043] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside 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.

[0044] Reference is made below to Figures 1-11The motor 2 according to the embodiment of the present application 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.

[0045] As shown in the figure, the motor 2 according to an embodiment of the present application comprises a rotor 3 and a stator 4. Figures 1-11

[0046] The rotor 3 is installed 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 at intervals in the 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. 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:

[0047] The motor 2, also known as a "motor", is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. The motor 2 can be divided into a motor and a generator, and can be applied to a rotary compressor 100, a refrigeration device, a household appliance, etc. The motor 2 has high flexibility and can meet different use requirements.

[0048] Specifically, the motor 2 is provided with a rotor 3 and a stator 4. The stator 4 is provided in a hollow structure, and the rotor 3 can be installed in the stator 4. The rotor 3 and the stator 4 can work together to realize the operation of the motor 2. The stator 4 is provided with a stator core 41 and a stator winding 42. The stator core 41 can be used to enhance electromagnetic induction and concentrate electromagnetic fields. The stator winding 42 refers to copper wire wound around the stator 4. The stator winding 42 is composed of a plurality of coils or coil groups, and is collectively referred to as a phase or an entire electromagnetic circuit. 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.

[0049] ​Further, the stator core 41 is provided in a cylindrical shape, and the stator core 41 is provided with a yoke portion 411 and tooth portions 412. The yoke portion 411 is provided in a ring structure, and the tooth portions 412 are provided in a plurality of tooth portions 412 spaced apart from the inner peripheral wall of the yoke portion 411, and the plurality of tooth portions 412 are provided extending toward 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 peripheral wall of the yoke portion 411 together define a stator slot 413. That is, the stator slot 413 is also formed in a plurality of stator slots 413, and the plurality of stator slots 413 are provided open toward the center of the yoke portion 411. The rotor 3 is installed in the stator 4, that is, the plurality of stator slots 413 are provided open toward the rotor 3. The stator winding 42 can be provided in the plurality of stator slots 413, respectively, so that the stator 4 and the rotor 3 operate together to ensure the reliability of the motor 2.

[0050] In the formula, the stator 4 is provided in a cylindrical shape, and has a center. 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, in units of mm, that is, 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, in units of mm. The number of poles of the rotor 3 can be set as P, and satisfies: That is, The value of the formula can be set as 26, 56 or 86, etc. The number of poles of the rotor 3 refers to the number of magnetic poles per phase coil uniformly distributed in the circumference of the stator 4. The more the number of stages, the lower the rotational speed.

[0051] Further, 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 is inversely proportional to the vibration amplitude. That is, the greater GCD(Q, P) 4 , the better the vibration noise of the motor 2, that is, the smaller the noise generated by the motor 2 during operation. 2xR1 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 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, and the efficiency of the motor 2 to decrease, etc. R1, R2, Q and P are set to satisfy: While ensuring the normal operation of motor 2, it can also improve the structural strength of motor 2, thereby ensuring the reliability of motor 2 operation, extending the service life of motor 2, reducing the noise generated by motor 2 during operation, and improving the user experience.

[0052] Among them, such as Figures 1-3 As shown, 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 follows: Figure 1 The complete circle shown can also be set as follows: Figures 2-3 The groove-shaped structure shown has an inwardly recessed shape. When measuring R1, the farthest distance from the outer peripheral wall of the yoke 411 to the center of the stator 4 should be measured.

[0053] According to an embodiment of the present invention, 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 P of the rotor 3 are set to satisfy the following: This can improve the structural strength of motor 2, ensure the reliability of motor 2 operation, extend the service life of motor 2, reduce the noise generated by motor 2 during operation, and improve the user experience, resulting in better performance and wider applicability.

[0054] In some embodiments, the following is satisfied:

[0055] 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 ≤ Right now The value can be set to 26, 46, or 66, etc.

[0056] Furthermore, such as Figure 8 As shown The graph shows the relationship between the noise level and the input noise level. The graph also shows that when... When the values ​​are less than or equal to 66 and greater than or equal to 26, the corresponding noise values ​​are low, that is, R1, R2, Q, and P are set to satisfy: While ensuring the normal operation of motor 2, it can further improve the structural strength of motor 2, thereby ensuring the operational reliability of motor 2, extending the service life of motor 2, and further reducing the noise generated by motor 2 during operation, thus improving the user experience.

[0057] In some embodiments, the following is satisfied:

[0058] 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: That is, the value of can be set as 32, 39, or 46, etc.

[0059] Further, as Figure 8 is shown as a curve diagram between the noise value, and it can be known from the curve diagram that when the value of 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: The motor 2 can be further improved in structural strength 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 by the motor 2 during operation, improving the user experience.

[0060] In some embodiments, the minimum distance between the two adjacent stator slots 413 is L1, and the following is satisfied: ≤ 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 two adjacent 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 is 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: That is, can be set as 0.3, 1.8, or 3, etc.

[0062] Furthermore, when the motor 2 operates, it generates radial force, 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 problems such as 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 the reliability of the motor 2. Therefore, L1, R1, and R2 are set to satisfy: While ensuring the efficiency and operational reliability of the motor 2, the structural strength of the gear 412 can be guaranteed, and the service life of the stator 4 can be extended.

[0063] In some embodiments, the following is satisfied:

[0064] 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 the following conditions are met: Right now The value can be set to 0.5, 0.6, or 0.7, etc.

[0065] Furthermore, such as Figure 10 As shown 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 that L1, R1 and R2 are set to satisfy: While ensuring the efficiency and operational reliability of the motor 2, the structural strength of the tooth section 412 can be further guaranteed, thereby further reducing the noise generated by radial vibration and extending the service life of the stator 4.

[0066] in, To constrain the ratio of R1-R2 to L1, the electromagnetic force of the motor 2 is generated by the interaction of the permanent magnetic field of the rotor 3 and the armature magnetic field generated by the energization of the stator winding 42 in the air gap between the rotor 3 and the stator 4, and the radial electromagnetic force is gradually transmitted outward from the tooth portion 412 close to the air gap to the yoke portion 411. By increasing the width of the tooth portion 412, the rigidity at this position can be enhanced, and the vibration noise can be reduced. However, the increase in the width of the tooth portion 412 will lead to a decrease in the area of the stator slot 413, further reducing the amount of enameled wire, increasing the electric density, and ultimately leading to serious heating of the motor 2, a decrease in the efficiency of the motor 2, and other problems. Therefore, L1 needs to be limited within a certain range.

[0067] In some embodiments, the minimum distance between the inner end of the tooth portion 412 and the center of the stator 4 is R3, and satisfies:

[0068] Specifically, as shown in Figures 1-4 , the plurality of tooth portions 412 are spaced apart from the inner peripheral wall of the yoke portion 411, and the plurality of tooth portions 412 are each arranged along the radial direction towards the center of the stator 4, so that the tooth portion 412 is formed with an inner end close to the center of the stator 4. The minimum distance between the inner end of the tooth portion 412 and the center is set as R3, unit: mm, 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, and R3 and R1 satisfy: That is, The value of can be set as 0.4, 0.6 or 0.7, etc.

[0069] Further, the minimum distance between the inner end of the tooth portion 412 and the center is set as R3, that is, the inner diameter of the stator 4 is set as R3. If the inner diameter of the stator 4 is set too large, the stator slot 413 will be too small, which will affect the operating efficiency of the motor 2. If the inner diameter of the stator 4 is set too small, the size of the rotor 3 in the stator 4 will be too large, and R1 and R3 will be set to satisfy: Under the condition of ensuring the efficiency and operating reliability of the motor 2, the size of the rotor 3 can be controlled, the noise generated during the operation of the motor 2 can be reduced, and the user experience can be improved.

[0070] In some embodiments, it satisfies:

[0071] Specifically, the minimum distance between the inner end of the tooth portion 412 and the center is set as R3, unit: mm, 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, and satisfy: That is, The value of can be set as 0.6, 0.62 or 0.65, etc. As shown in Figure 11 , it is a curve diagram between and the noise value, and from the curve diagram, 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, that is, the noise is relatively small within the above range, so that R1 and R3 are set to satisfy: While ensuring the efficiency and operational reliability of motor 2, the size of rotor 3 can be controlled, thereby further reducing the noise generated during the operation of motor 2 and improving the user experience.

[0072] 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.

[0073] In some embodiments, the following condition is satisfied: 24mm≤R3≤40mm.

[0074] 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.

[0075] In some embodiments, the following conditions are met: 15 ≤ Q ≤ 18; and / or, 10 ≤ P ≤ 12.

[0076] 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.

[0077] Further, 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 is inversely proportional to the vibration amplitude, that is, GCD(Q, P) 4 is greater, the vibration noise of the motor 2 is better, and thus the noise generated during operation of the motor 2 can be reduced to improve user comfort.

[0078] 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

[0079] Specifically, the number of phases of the motor 2 is set as m, the number of phases of the motor 2 refers to the number of coils in the motor 2, the more the number of coils in the motor 2, the higher the number of phases of the motor 2, 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 is 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

[0080] In some embodiments, the greatest common divisor of the number of stator slots 413 Q and the number of poles P of the rotor 3 is GCD(Q, P), which satisfies: 5≤GCD(Q, P)≤6.

[0081] Specifically, the number of stator slots 413 Q and the number of poles P of the rotor 3 are set, the greatest common divisor of the number of stator slots 413 Q and the number of poles P of the rotor 3 is GCD(Q, P), and the greatest common divisor of the number of stator slots 413 Q and the number of poles P of the rotor 3 GCD(Q, P) is set to satisfy: 5≤GCD(Q, P)≤6, that is, the greatest common divisor of the number of stator slots 413 Q and the number of poles P of the rotor 3 GCD(Q, P) can be set to 5 or 6, when the number of stator slots 413 Q is set to 15 and the number of poles of the rotor 3 is set to 10, the greatest common divisor of the number of stator slots 413 Q and the number of poles P of the rotor 3 GCD(Q, P) is 5, when the number of stator slots 413 Q is set to 18 and the number of poles of the rotor 3 is set to 12, the greatest common divisor of the number of stator slots 413 Q and the number of poles P of the rotor 3 GCD(Q, P) is 6, in the embodiment, the number of stator slots 413 Q is 15 and the number of poles of the rotor 3 is 10, the greatest common divisor of the number of stator slots 413 Q and the number of poles P of the rotor 3 GCD(Q, 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.

[0082] In some embodiments, it satisfies: 45mm≤R1≤70mm.

[0083] Specifically, the stator 4 is set to be cylindrical, has a center, and the yoke portion 411 of the stator 4 is set to be 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 is set to be R1, unit: mm, that is, the maximum radius of the stator 4 is set to be R1, and the maximum distance R1 between the outer wall of the yoke portion 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 portion 411 and the center of the stator 4 can be set to 45mm, 55mm or 70mm, etc.

[0084] Further, with other dimensions unchanged, the smaller R1 is, the smaller the maximum thickness of the yoke portion 411 is, resulting in reduced reliability of the motor 2, and the larger R1 is, the larger the maximum thickness of the yoke portion 411 is, thereby making the motor 2 more rigid and reducing the noise generated when the motor 2 rotates, but the larger the thickness of the yoke portion 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, thereby causing problems such as temperature rise during operation of the motor 2 and reduced efficiency of the motor 2. Setting the maximum distance R1 between the outer wall of the yoke portion 411 and the center of the stator 4 to satisfy 45mm≤R1≤70mm can ensure normal operation of the motor 2 while improving the structural strength of the motor 2, thereby ensuring the reliability of the motor 2 in operation, prolonging the service life of the motor 2, reducing the noise generated during operation of the motor 2, and improving the user experience.

[0085] The application further provides a rotary compressor 100.

[0086] The rotary compressor 100 according to the embodiment of the application comprises a pump body component 1 and the motor 2 of any one of the above, the rotor 3 comprises a rotor core 31, the pump body component 1 comprises a crankshaft 11, a first bearing 12, a second bearing 13 and a cylinder 14, one end of the crankshaft 11 is connected to 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 to an eccentric member in the cylinder 14; wherein the distance between the contact surface of the first bearing 12 cooperating with the cylinder 14 and the side surface of the rotor core 31 facing the first bearing 12 is H, and satisfies:

[0087] Specifically, the rotary compressor 100 is a driven fluid machine that lifts low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. The rotary compressor 100 can suck in low-temperature and low-pressure refrigerant gas from a suction pipe, and then discharge high-temperature and high-pressure refrigerant gas to a discharge pipe after compression by a piston driven by the rotation of the motor 2, to provide power to a refrigeration cycle. The rotary compressor 100 is provided with a shell 5, a pump body component 1, a motor 2 and a liquid accumulator 6.

[0088] Further, the rotor 3 is provided with a rotor core 31 and a rotor magnet 32, the motor 2 and the pump body component 1 are arranged in the shell 5, the liquid accumulator 6 is connected to the pump body component 1, and the pump body component 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 component 1, the first bearing 12 is arranged above the pump body component 1, and the cylinder 14 is arranged between the first bearing 12 and the second bearing 13, as shown in Figures 5-6As shown, the cylinder 14 can be provided as one, two, etc., and one end of the crankshaft 11 is connected with the rotor core 31, and 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 member in the cylinder 14, so that the rotation of the crankshaft 11 can drive the rotor 3 to rotate.

[0089] 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, unit: mm, the maximum distance between the outer wall of the yoke part 411 and the center of the stator 4 is R1, unit: mm, the distance between the inner wall of the stator slot 413 farthest from the center and the center can be R2, unit: mm, and H, R1 and R2 satisfy: That is The value of 0.08, 0.3 or 0.43 can be set.

[0090] 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, so that the rotor 3 will form a swing arm when the rotor 3 runs, thereby causing the motor 2 to produce noise when running, and a cavity is formed between the rotor core 31 and the pump body part 1, and resonance will occur between the air in the cavity and the yoke part 411 of the stator 4, the greater the resonance, the greater the noise of the motor 2, thereby setting H, R1 and R2 to satisfy: The noise generated by the swing arm of the rotor 3 and the noise generated by the resonance of the air and the yoke part 411 can be reduced, and the user's use experience can be improved.

[0091] According to the rotary compressor 100 of the embodiment of the application, by setting 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: Thus, the structural strength of the motor 2 can be improved, the operation reliability of the motor 2 can be ensured, the service life of the motor 2 can be prolonged, the noise generated when the motor 2 operates can be reduced, and the user's use experience can be improved, the use effect is better, and the application range is wider.

[0092] In some embodiments, the following conditions are met:

[0093] Specifically, the maximum distance between the outer wall of the yoke part 411 and the center of the stator 4 can be R1, unit: mm, the farthest distance between the bottom of the stator slot 413 and the center can be 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 H, unit: mm, and the following conditions are met: That is The value can be set to 0.14, 0.15, or 0.16, etc.

[0094] Furthermore, such as Figure 9 As shown 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 values ​​are less than or equal to 0.16 and greater than or equal to 0.14, the corresponding stiffness values ​​are relatively high, that is, R1, R2, and H are set to satisfy: While ensuring the normal operation of motor 2, it can further improve the structural strength of motor 2, thereby ensuring the operational reliability of motor 2, extending the service life of motor 2, and further reducing the noise generated by motor 2 during operation, thus improving the user experience.

[0095] in, To constrain the ratios of R1-R2 and H, since the rotary compressor 100 compresses gas through the rotation of the eccentric component of the crankshaft 11, and the crankshaft 11 is fitted with the rotor 3, to balance the imbalance caused by the eccentric component, balance blocks of different shapes and weights are installed on the upper and lower end plates of the rotor 3 to adjust the overall balance. Because the cavity between the contact surface of the first bearing 12 and the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 has an asymmetrical structure, the gas disturbance within the cavity and the centripetal force generated by the rotation when the rotor 3 carries the balance blocks directly radiate gas pulsations to the yoke 411. Therefore, increasing the height of H can effectively reduce the impact of gas disturbance, but H cannot be infinitely high because the rotor 3 is fixed to the first bearing 12 and the second bearing 13 in a cantilever beam structure. The larger the cavity space, the greater the amplitude of rotor 3's oscillation, leading to more severe vibration and noise degradation. Therefore, constraints are imposed on R1-R2 and H.

[0096] In some embodiments, the following condition is satisfied: 5mm≤R1-R2≤13mm.

[0097] 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, and 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 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 of the motor 2 during operation, reduction of motor 2 efficiency, etc., setting R1-R2 to satisfy 5mm≤R1-R2≤13mm can ensure normal operation of the motor 2 while improving the structural strength 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 during operation of the motor 2, and improving the user experience.

[0098] In some embodiments, 29mm≤H≤72mm is satisfied.

[0099] Specifically, the distance between the contact surface of the first bearing 12 cooperating 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 between the contact surface of the first bearing 12 cooperating with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 is set to satisfy 29mm≤H≤72mm, that is, the distance H between the contact surface of the first bearing 12 cooperating with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 can be set to 29mm, 55mm or 72mm, and the distance H between the contact surface of the first bearing 12 cooperating with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 is the distance between the rotor core 31 and the pump body part 1, when H is too large, the rotor 3 will swing when operating, thereby causing noise when the motor 2 operates, and setting H to satisfy 29mm≤H≤72mm can reduce the noise generated by the rotor 3 swinging and improve the user experience.

[0100] The application further provides a refrigeration device.

[0101] The refrigeration device 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.

[0102] The refrigeration device according to the embodiments of the application sets the maximum distance R1 between the outer wall of the yoke portion 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 to satisfy: Further, the structural strength of the motor 2 can be improved, the operation reliability of the motor 2 can be ensured, the service life of the motor 2 can be prolonged, the noise generated during the operation of the motor 2 can be reduced, the user experience can be improved, the use effect is better, and the application range is wider.

[0103] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like 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. Furthermore, the specific features, structures, materials or characteristics described can be appropriately combined in any one or more embodiments or examples.

[0104] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electric motor, characterized in that, include: Rotor; The stator includes a stator core and a stator winding. The stator core includes a yoke and a plurality of teeth. The yoke is annular in structure. The plurality of teeth are spaced apart in the circumferential direction of the yoke. Two adjacent teeth together define a stator slot with the yoke. The stator winding is disposed 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 stator slots is Q, the number of poles of the rotor is P, and GCD(Q,P) is the greatest common divisor of Q and P, and satisfies:

2. The motor according to claim 1, characterized in that, satisfy:

3. The motor according to claim 1, characterized in that, satisfy:

4. The motor according to any one of claims 1-3, characterized in that, The minimum distance between two adjacent stator slots is L1, and satisfies:

5. The motor according to claim 4, characterized in that, satisfy:

6. The motor according to any one of claims 1-3, characterized in that, The minimum distance between the inner end of the tooth and the center of the stator is R3, and satisfies:

7. The motor according to claim 6, characterized in that, satisfy:

8. The motor according to claim 6, characterized in that, The following conditions must be met: 24mm≤R3≤40mm.

9. The motor according to any one of claims 1-3, characterized in that, Satisfies: 15≤Q≤18; And / or, satisfying: 10≤P≤12.

10. The motor according to any one of claims 1-3, characterized in that, The number of slots per pole per phase is q, and the number of phases of the motor is m; Where q = Q / mP, and satisfies: 0 < q < 1.

11. The motor according to any one of claims 1-3, characterized in that, The greatest common divisor of the number of stator slots Q and the number of rotor poles P is GCD(Q,P), which satisfies: 5≤GCD(Q,P)≤6.

12. A rotary compressor, characterized in that, The pump body includes a pump body component and an electric motor according to any one of claims 1-11. 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. The other end of the crankshaft passes through the first bearing, the cylinder, and the second bearing in sequence. The other end of the crankshaft is connected to an eccentric component inside the cylinder. Wherein, the distance H between the contact surface of the first bearing and the cylinder that mates with the side of the rotor core facing the first bearing is, and satisfies:

13. The rotary compressor according to claim 12, characterized in that, satisfy:

14. The rotary compressor according to claim 12, characterized in that, The following condition must be met: 5mm≤R1-R2≤13mm.

15. A refrigeration device, characterized in that, It includes the motor according to any one of claims 1-11 or the rotary compressor according to any one of claims 12-14.

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