Motor, rotary compressor and refrigeration equipment

Abstract

The embodiment of the utility model discloses a motor, a rotary compressor and refrigeration equipment, the motor is characterized in that a rotor is installed in a stator, the stator comprises a stator iron core and a stator winding, the stator iron core comprises a yoke part and a plurality of tooth parts, the yoke part is annular, the plurality of tooth parts are distributed at intervals in the circumferential direction of the yoke part, and the stator winding is wound on the stator iron core. 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. The motor provided by the embodiment of the utility model can improve the structural strength of the motor, ensure the operation reliability of the motor, prolong the service life of the motor, and improve the reliability of the motor. 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 utility model relates to the field of industrial technologies, and in particular to an electric motor, a rotary compressor and a refrigeration device. Background Art

[0002] As an important device for converting electrical energy into mechanical energy, the electric motor plays a key role in many fields such as rotary compressors, refrigeration devices and household appliances. The electric motor mainly consists of a stator assembly and a rotor assembly, and the electric motor can generate a rotating magnetic field through the current flowing in the stator winding, and then can interact with the rotor magnet in the rotor assembly to generate a rotating torque. However, the existing electric motor has low structural strength and generates problems such as noise during operation, resulting in a short service life, poor reliability, and affecting the use experience, and there is room for improvement. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an electric motor, which can improve the structural strength of the electric motor, ensure the operation reliability of the electric motor, extend the service life of the electric motor, reduce the noise generated during the operation of the electric motor, and improve the user experience.

[0004] The electric motor according to an embodiment of the utility model includes: a rotor; a stator, the rotor is installed in the stator, the stator includes a stator core and a stator winding, the stator core includes a yoke portion and a plurality of tooth portions, the yoke portion is configured as a ring, and the plurality of tooth portions are spaced apart in the circumferential direction of the yoke portion, and adjacent two of the tooth portions together with the yoke portion define a stator slot, and the stator winding is disposed in the stator slot; wherein, the maximum distance between the outer wall of the yoke portion and the center of the stator is R 1 , the maximum distance between the bottom of the stator slot and the center of the stator is R 2 , 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:

[0005] The electric motor according to an embodiment of the utility model, by setting the maximum distance R 1 between the outer wall of the yoke portion and the center of the stator, the maximum distance R 2 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 poles of the rotor to satisfy: Furthermore, the structural strength of the electric motor can be improved, the operation reliability of the electric motor can be ensured, the service life of the electric motor can be extended, the noise generated during the operation of the electric motor can be reduced, and the user experience can be improved, and the use effect is better and the applicable range is wider.

[0006] The electric motor according to some embodiments of the utility model satisfies:

[0007] The motor according to some embodiments of the present utility model satisfies:

[0008] For the motor according to some embodiments of the present utility model, the minimum distance between two adjacent stator slots is L 1 , and satisfies:

[0009] The motor according to some embodiments of the present utility model satisfies:

[0010] For the motor according to some embodiments of the present utility model, the minimum distance between the inner end of the tooth part and the center of the stator is R 3 , and satisfies:

[0011] The motor according to some embodiments of the present utility model satisfies:

[0012] For the motor according to some embodiments of the present utility model, it satisfies: 24 mm ≤ R 3 ≤ 40 mm.

[0013] For the motor according to some embodiments of the present utility model, it satisfies: 15 ≤ Q ≤ 18; and / or, it satisfies: 10 ≤ P ≤ 12.

[0014] For the motor according to some embodiments of the present utility model, 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 < q < 1.

[0015] For the motor according to some embodiments of the present utility model, the greatest common divisor of the number of stator slots Q and the number of rotor poles P is GCD(Q, P), and it satisfies: 5 ≤ GCD(Q, P) ≤ 6.

[0016] The present utility model also proposes a rotary compressor.

[0017] The rotary compressor according to the embodiment of the present utility model includes a pump body component and the motor described in any one of the above, 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, and the other end of the crankshaft is connected to an eccentric member in the cylinder; wherein, the distance between the contact surface of the first bearing cooperating with the cylinder and the side surface of the rotor core facing the first bearing is H, and it satisfies:

[0018] For the rotary compressor according to some embodiments of the present utility model, it satisfies:

[0019] The rotary compressor according to some embodiments of the present utility model satisfies: 5 mm ≤ R 1 -R 2 ≤ 13 mm.

[0020] The present utility model also provides a refrigeration device.

[0021] The refrigeration device according to the embodiments of the present utility model includes the motor described in any one of the above or the rotary compressor described in any one of the above.

[0022] The refrigeration device, the rotary compressor, and the above-mentioned motor have the same advantages as those of the prior art, which will not be elaborated herein.

[0023] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0025] Figure 1 is a schematic structural diagram of a stator according to an embodiment of the present utility model Figure 1 ;

[0026] Figure 2 is a schematic structural diagram of a stator according to an embodiment of the present utility model Figure 2 ;

[0027] Figure 3 is a schematic structural diagram of a stator according to an embodiment of the present utility model Figure 3 ;

[0028] Figure 4 is a schematic structural diagram of a motor according to an embodiment of the present utility model;

[0029] Figure 5 is a schematic structural diagram of a pump body component and a rotor according to an embodiment of the present utility model Figure 1 ;

[0030] Figure 6 is a schematic structural diagram of a pump body component and a rotor according to an embodiment of the present utility model Figure 2 ;

[0031] Figure 7 is a schematic structural diagram of a rotary compressor according to an embodiment of the present utility model;

[0032] Figure 8 is a schematic curve diagram of noise according to an embodiment of the present utility model;

[0033] Figure 9 is a schematic diagram of a rigid curve according to an embodiment of the present utility model Figure 1 ;

[0034] Figure 10 is a schematic diagram of a rigid curve according to an embodiment of the present utility model Figure 2 ;

[0035] Figure 11 is a schematic diagram of a rigid curve according to an embodiment of the present utility model Figure 3 。

[0036] Reference numerals:

[0037] Rotary compressor 100,

[0038] Pump body component 1, crankshaft 11, first bearing 12, second bearing 13, cylinder 14,

[0039] Motor 2, rotor 3, rotor core 31, rotor magnet 32, stator 4, stator core 41, yoke portion 411, tooth portion 412, stator slot 413, stator winding 42, housing 5, liquid accumulator 6. Detailed implementation manners

[0040] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0041] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0042] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] Reference is made below to Figures 1 - 11 Describe the motor 2 according to an embodiment of the present utility model, which can improve the structural strength of the motor 2, ensure the operation reliability of the motor 2, extend the service life of the motor 2, and can reduce the noise generated during the operation of the motor 2, thereby improving the user experience.

[0044] As Figures 1 - 11 shown, the motor 2 according to an embodiment of the present utility model includes: a rotor 3 and a stator 4.

[0045] The rotor 3 is installed inside the stator 4. The stator 4 includes a stator core 41 and a stator winding 42. The stator core 41 includes a yoke portion 411 and a plurality of tooth portions 412. The yoke portion 411 is configured as a ring shape. The plurality of tooth portions 412 are spaced apart in the circumferential direction of the yoke portion 411. Adjacent two tooth portions 412 together with the yoke portion 411 define a stator slot 413. The stator winding 42 is disposed in the stator slot 413. Wherein, the maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 is R 1 , and the maximum distance from the bottom of the stator slot 413 to the center of the stator 4 is R 2 , the number of stator slots 413 is Q, the number of poles of the rotor 3 is P, and the following is satisfied:

[0046] Wherein, the motor 2 is commonly known as a "motor", which refers to an electromagnetic device that realizes the conversion or transfer of electrical energy based on the electromagnetic induction law. The motor 2 can be divided into motors and generators, etc. The motor 2 can be applied to rotary compressors 100, refrigeration equipment, household appliances, etc., with high flexibility of use and can meet different usage requirements.

[0047] Specifically, the motor 2 is provided with a rotor 3 and a stator 4. The stator 4 is set as a hollow structure. The rotor 3 can be installed inside 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 the electromagnetic field. The stator winding 42 refers to the copper wire wound around the stator 4. The stator winding 42 is a general term for a phase or the entire electromagnetic circuit composed of multiple coils or coil groups. When the motor 2 is operating, the stator 4 will generate 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 remains stationary, and the rotor 3 participates in the rotation of the motor 2.

[0048] Furthermore, the stator core 41 is set as a cylinder, and the stator core 41 is provided with a yoke portion 411 and tooth portions 412. The yoke portion 411 is set as an annular structure. There are multiple tooth portions 412. The multiple tooth portions 412 are spaced apart and connected to the inner peripheral wall of the yoke portion 411. And the multiple tooth portions 412 all extend towards the center of the yoke portion 411. The distance between adjacent tooth portions 412 is equal. And the adjacent tooth portions 412 and the inner peripheral wall of the yoke portion 411 jointly define the stator slots 413, that is, there are also multiple stator slots 413. The multiple stator slots 413 are all open towards the center of the yoke portion 411. The rotor 3 is installed inside the stator 4, that is, the multiple stator slots 413 are all open towards the rotor 3. The stator windings 42 can be respectively arranged in the multiple stator slots 413, so that the stator 4 and the rotor 3 work together to ensure the operation reliability of the motor 2.

[0049] Among them, the stator 4 is set as a cylinder, which has a center. And the yoke portion 411 is arranged on 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 R 1 , in the unit of mm, that is, the maximum radius of the stator 4 is set as R 1 , the inner side of the yoke portion 411 is connected with multiple tooth portions 412. There are stator slots 413 formed between adjacent tooth portions 412. 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 R 2 , in the unit of mm. The number of poles of the rotor 3 can be set as P, and it satisfies: That is The value of can be set as 26, 56 or 86, etc. The number of poles of the rotor 3 refers to the number of magnetic poles evenly distributed by each phase of coils within the circumference of the stator 4. The more the number of poles, the lower the speed.

[0050] Furthermore, GCD(Q, P) refers to 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, that is, GCD(Q, P) 4The larger it is, the better the vibration noise of the motor 2, that is, the smaller the noise generated when the motor 2 operates, 2×R 1 is the maximum diameter of the stator 4, R 1 -R 2 is the maximum thickness of the yoke 411, R 1 -R 2 The minimum value of is limited by the electrical safety distance, and R 1 -R 2 The larger it is, the larger the maximum thickness of the yoke 411, and further the greater the rigidity of the motor 2, which can reduce the noise generated when the motor 2 rotates, and R 1 -R 2 The maximum value of 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 the stator slot 413 can accommodate, which will lead to problems such as an increase in the temperature when the motor 2 operates and a decrease in the efficiency of the motor 2. Regarding R 1 、R 2 、Q and P are set to satisfy: While ensuring the normal operation of the motor 2, it can also improve the structural strength of the motor 2, and further ensure the operation reliability of the motor 2, extend the service life of the motor 2, reduce the noise generated when the motor 2 operates, and improve the user experience.

[0051] Among them, as Figures 1 - 3 shown, the yoke 411 is set as an annular structure and is arranged on the outermost side of the stator core 41, R 1 is the maximum distance between the outer wall of the yoke 411 and the center of the stator 4. In actual setting, the outer peripheral wall of the yoke can be set as a complete circle as Figure 1 shown, or can be set as a grooved structure with an inward recess as Figures 2 - 3 shown. When measuring R 1 , the farthest distance from the outer peripheral wall of the yoke 411 to the center of the stator 4 should be measured.

[0052] According to the motor 2 of the embodiment of the present invention, by setting the maximum distance R 1 between the outer wall of the yoke 411 and the center of the stator 4, the maximum distance R 2 from the bottom of the stator slot 413 to the center of the stator 4, the number Q of the stator slots 413 and the number of poles P of the rotor 3 to satisfy: Furthermore, it can improve the structural strength of the motor 2, ensure the operation reliability of the motor 2, extend the service life of the motor 2, reduce the noise generated when the motor 2 operates, and improve the user experience, with better use effects and a wider application range.

[0053] In some embodiments, it satisfies:

[0054] Specifically, the maximum distance between the outer wall of the yoke 411 and the center of the stator 4 can be set to R 1 , in millimeters, stator slots 413 are formed between adjacent tooth portions 412, and the number of stator slots 413 is Q. The maximum distance between the bottom of the stator slot 413 and the center can be set to R 2 , in millimeters, the number of poles of the rotor 3 can be set to P, and it satisfies: That is The value of can be set to 26, 46, or 66, etc.

[0055] Furthermore, as Figure 8 shown is the schematic curve diagram between and the noise value. And from the schematic curve diagram, it can be known that when the value of is less than or equal to 66 and greater than or equal to 26, the corresponding noise value is relatively low. That is, setting R 1 , R 2 , Q, and P to satisfy: can ensure the normal operation of the motor 2 while further improving the structural strength of the motor 2, thereby ensuring the operating reliability of the motor 2, extending the service life of the motor 2, and further reducing the noise generated during the operation of the motor 2, improving the user experience.

[0056] In some embodiments, it satisfies:

[0057] Specifically, the maximum distance between the outer wall of the yoke 411 and the center of the stator 4 can be set to R 1 , in millimeters, stator slots 413 are formed between adjacent tooth portions 412, and the number of stator slots 413 is Q. The maximum distance between the bottom of the stator slot 413 and the center can be set to R 2 , in millimeters, the number of poles of the rotor 3 can be set to P, and it satisfies: That is The value of can be set to 32, 39, or 46, etc.

[0058] Furthermore, as Figure 8 shown is the schematic curve diagram between and the noise value. And from the schematic curve diagram, it can be known that when the value of is less than or equal to 46 and greater than or equal to 32, the corresponding noise values are all at the lower points of the curve. That is, within the above range, the noise value is relatively small, such that setting R 1 , R 2 , Q, and P to satisfy: While ensuring the normal operation of the motor 2, the structural strength of the motor 2 can be further improved, thereby ensuring the operating reliability of the motor 2, extending the service life of the motor 2, and further reducing the noise generated during the operation of the motor 2, improving the user experience.

[0059] In some embodiments, the minimum distance between two adjacent stator slots 413 is L 1 , and it satisfies:

[0060] Specifically, a plurality of tooth portions 412 are connected to the inner peripheral wall of the yoke portion 411 at intervals, and the stator slots 413 are defined between adjacent tooth portions 412, that is, there are also a plurality of stator slots 413 formed. The adjacent stator slots 413 are separated by a single tooth portion 412, and the minimum distance between adjacent stator slots 413 is set to L 1 , in mm, that is, the minimum thickness of the tooth portion 412 between two adjacent stator slots 413 is L 1 , the maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 can be set to R 1 , in mm, the farthest distance between the bottom of the stator slot 413 and the center of the circle can be set to R 2 , in mm, R 1 -R 2 refers to the maximum thickness of the yoke portion 411, and L 1 , R 1 and R 2 satisfy: That is can be set to 0.3, 1.8 or 3, etc.

[0061] Furthermore, when the motor 2 operates, a radial force will be generated, and the radial force can be transmitted outward through the tooth portion 412. The minimum thickness of the tooth portion 412 between two adjacent stator slots 413 is L 1 , L 1 The larger the value, the greater the structural strength of the tooth portion 412. Furthermore, when the radial force is conducted through the tooth portion 412, problems such as deformation of the tooth portion 412 can be avoided, ensuring the operating reliability of the tooth portion 412. The minimum thickness L of the tooth portion 412 1 is also limited by the size of the stator slot 413. The smaller the stator slot 413, the lower the efficiency of the motor 2 and the lower the reliability of the motor 2. Furthermore, L 1 , R 1 and R 2 are set to satisfy: Under the condition of ensuring the efficiency and operating reliability of the motor 2, the structural strength of the tooth portion 412 can be ensured, and the service life of the stator 4 can be extended.

[0062] In some embodiments, it satisfies:

[0063] Specifically, stator slots 413 are formed between adjacent tooth portions 412, and the minimum distance between two adjacent stator slots 413 is set to L 1 , in millimeters, the maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 can be set to R 1 , in millimeters, the farthest distance between the bottom of the stator slot 413 and the center of the circle can be set to R 2 , in millimeters, and satisfy: That is The value of can be set to 0.5, 0.6 or 0.7, etc.

[0064] Furthermore, as Figure 10 shown is the schematic curve diagram between and the rigidity value, and it can be known from the schematic curve diagram that when the value of is less than or equal to 0.7 and greater than or equal to 0.5, the corresponding rigidity value is located at the higher point of the curve, that is, the rigidity is greater within the above range, so that making L 1 , R 1 and R 2 are set to satisfy: can, while ensuring the efficiency and operation reliability of the motor 2, further ensure the structural strength of the tooth portion 412, and further reduce the noise generated by radial vibration, and extend the service life of the stator 4.

[0065] Among them, is to constrain the ratio of R 1 -R 2 to L 1 . The electromagnetic force of the motor 2 is generated by the interaction between 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. The generated radial electromagnetic force is directly transmitted from the tooth portion 412 near the air gap to the yoke portion 411 gradually outward. By increasing the width of the tooth portion 412, the rigidity at this place can also 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 used and increasing the current density, ultimately resulting in serious heating of the motor 2 and a decrease in the efficiency of the motor 2. Therefore, L 1 needs to be limited within a certain range.

[0066] In some embodiments, the minimum distance between the inner end of the tooth portion 412 and the center of the stator 4 is R 3 , and satisfy:

[0067] Specifically, as Figures 1 - 4As shown, a plurality of tooth portions 412 are connected to the inner peripheral wall of the yoke portion 411 at intervals, and the plurality of tooth portions 412 all extend radially toward the center of the stator 4, so that the tooth portions 412 are formed with inner ends close to the center of the stator 4, and the minimum distance between the inner end of the tooth portion 412 and the center is set to R 3 , in mm, the maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 can be set to R 1 , in mm, and R 3 and R 1 satisfy: That is The value of can be set to 0.4, 0.6 or 0.7, etc.

[0068] Furthermore, the minimum distance between the inner end of the tooth portion 412 and the center is set to R 3 , that is, the inner diameter of the stator 4 is set to R 3 , setting the inner diameter of the stator 4 too large will result in too small a stator slot 413, thereby affecting the operating efficiency of the motor 2. Setting the inner diameter of the stator 4 too small will cause the size of the rotor 3 inside the stator 4 to be too large, and then R 1 and R 3 are set to satisfy: It is possible to control the size of the rotor 3, reduce the noise generated during the operation of the motor 2, and improve the user experience while ensuring the efficiency and operating reliability of the motor 2.

[0069] In some embodiments, satisfy:

[0070] Specifically, the minimum distance between the inner end of the tooth portion 412 and the center is set to R 3 , in mm, the maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 can be set to R 1 , in mm, and satisfy: That is The value of can be set to 0.6, 0.62 or 0.65, etc., as Figure 11 shown as the curve schematic diagram between and the noise value, and from the curve schematic diagram, it can be seen that when the value of is less than or equal to 0.65 and greater than or equal to 0.6, the corresponding noise value is at the lower point of the curve, that is, the noise is smaller within the above range, so that R 1 and R 3 are set to satisfy: It is possible to control the size of the rotor 3, and further reduce the noise generated during the operation of the motor 2, and improve the user experience while ensuring the efficiency and operating reliability of the motor 2.

[0071] Among them, To constrain the ratio of R 3 and R 1 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. By adjusting the proportional relationship between R1 and R3, the noise can be improved. In addition to reducing the transmission impact by increasing the width of the tooth part 412, the electromagnetic force generated by the air gap between the stator 4 and the rotor 3 can also reduce the influence of the radial electromagnetic force vibration by shortening the length of the tooth part 412. The shorter the tooth part 412, the smaller the amplitude of the electromagnetic force acting on the vibration of the tooth part 412. However, the tooth part 412 cannot be reduced without limit. Shortening the length of the tooth part 412 will result in a decrease in the area of the stator slot 413, further reducing the amount of enameled wire used and increasing the current density, ultimately leading to serious heating problems of the motor 2 and a decrease in the efficiency of the motor 2. Therefore, through the R 3 and R 1 The proportional relationship can balance the noise vibration and efficiency.

[0072] In some embodiments, it satisfies: 24mm ≤ R 3 ≤ 40mm.

[0073] Specifically, the minimum distance between the inner end of the tooth part 412 and the center of the circle is set to R 3 , in mm, that is, the inner diameter of the stator 4 is set to R 3 , and R 3 is set to satisfy: 24mm ≤ R 3 ≤ 40mm, that is, R 3 can be set to 24mm, 32mm or 40mm, etc. Setting the inner diameter of the stator 4 too large will result in too small a stator slot 413, thereby affecting the operating efficiency of the motor 2. Setting the inner diameter of the stator 4 too small will result in too large a size of the rotor 3 inside the stator 4, and then setting R 3 to satisfy: 24mm ≤ R 3 ≤ 40mm can control the size of the rotor 3 while ensuring the efficiency and operating reliability of the motor 2, reduce the noise generated during the operation of the motor 2, and improve the user experience.

[0074] In some embodiments, it satisfies: 15 ≤ Q ≤ 18; and / or, it satisfies: 10 ≤ P ≤ 12.

[0075] Specifically, the tooth portions 412 are provided in a plurality, and stator slots 413 are formed between adjacent tooth portions 412, that is, the stator slots 413 are provided in a plurality. The number of stator slots 413 can be set to Q, the number of poles of the rotor 3 can be set to P, and the number of stator slots 413, Q, is set to satisfy: 15 ≤ Q ≤ 18, that is, the number of stator slots 413, Q, can be set to 15, 16, or 18, etc., and the number of poles of the rotor 3, P, is set to satisfy: 10 ≤ P ≤ 12, that is, the number of poles of the rotor 3, P, can be set to 10, 11, or 12, etc. In actual setting, the number of stator slots 413, Q, can be limited to satisfy: 15 ≤ Q ≤ 18 only, or the number of poles of the rotor 3, P, can be limited to satisfy: 10 ≤ P ≤ 12 only, or the number of stator slots 413, Q, can be limited to satisfy: 15 ≤ Q ≤ 18 while the number of poles of the rotor 3, P, is limited to satisfy: 10 ≤ P ≤ 12.

[0076] Further, in this embodiment, the number of stator slots 413, Q, is limited to satisfy: 15 ≤ Q ≤ 18, and the number of poles of the rotor 3, P, is limited to satisfy: 10 ≤ P ≤ 12. Limiting the number of stator slots 413, Q, to satisfy: 15 ≤ Q ≤ 18 and the number of poles of the rotor 3, P, to satisfy: 10 ≤ P ≤ 12 can increase the greatest common divisor GCD(Q, P) 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, that is, GCD(Q, P) 4 is larger, the vibration noise of the motor 2 is better, and thus the noise generated during the operation of the motor 2 can be reduced to improve the user's comfort.

[0077] In some embodiments, the number of slots per pole per phase is q, and the number of phases of the motor 2 is m; where q = Q / mP and satisfies: 0 < q < 1.

[0078] Specifically, the number of phases of the motor 2 is set to m. The number of phases of the motor 2 refers to the number of coils in the motor 2. In the motor 2, the more the number of coils, the higher the number of phases of the motor 2. The number of stator slots 413 can be set to Q, the number of poles of the rotor 3 can be set to P, the number of slots per pole per phase is set to q, and q = Q / mP, that is, the number of slots per pole per phase is directly proportional to the number of 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 < q < 1, that is, q can be set to 0.1, 0.5, or 0.8, etc., so that the ratio of the number of stator slots 413 to the product of the number of phases of the motor 2 and the number of poles of the rotor 3 is a fraction, thereby ensuring that the number of slots per pole per phase of the motor 2 is non-integer, to ensure the operation reliability and performance of the motor 2, and can reduce the noise generated during the operation of the motor 2 and improve the user's comfort.

[0079] In some embodiments, the greatest common divisor of the number Q of stator slots 413 and the number P of rotor poles 3 is GCD(Q, P), satisfying: 5 ≤ GCD(Q, P) ≤ 6.

[0080] Specifically, the number of stator slots 413 can be set as Q, the number of rotor poles 3 can be set as P, the greatest common divisor of the number Q of stator slots and the number of rotor poles P is set as GCD(Q, P), and the greatest common divisor GCD(Q, P) of the number Q of stator slots and the number of rotor poles P is set to satisfy: 5 ≤ GCD(Q, P) ≤ 6, that is, the greatest common divisor GCD(Q, P) of the number Q of stator slots and the number of rotor poles P can be set to 5 or 6. When the number Q of stator slots 413 is set to 15 and the number of rotor poles 3 is set to 10, the greatest common divisor GCD(Q, P) of the number Q of stator slots and the number of rotor poles P is 5. When the number Q of stator slots 413 is set to 18 and the number of rotor poles 3 is set to 12, the greatest common divisor GCD(Q, P) of the number Q of stator slots and the number of rotor poles P is 6. In this embodiment, the number Q of stator slots 413 is 15 and the number of rotor poles 3 is 10, and the greatest common divisor GCD(Q, P) of the number Q of stator slots and the number of rotor poles P is 5, which can ensure the operating reliability and performance of the motor 2, and can reduce the noise generated during the operation of the motor 2, improving the user's comfort.

[0081] In some embodiments, it satisfies: 45 mm ≤ R 1 ≤ 70 mm.

[0082] Specifically, the stator 4 is set as a cylinder, which has a center, and the yoke 411 of the stator 4 is arranged on the outermost side of the stator 4. The maximum distance between the outer wall of the yoke 411 and the center of the stator 4 can be set as R 1 , in units of mm, that is, the maximum radius of the stator 4 is set as R 1 , and the maximum distance R between the outer wall of the yoke 411 and the center of the stator 4 1 can be set to satisfy: 45 mm ≤ R 1 ≤ 70 mm, that is, the maximum distance R between the outer wall of the yoke 411 and the center of the stator 4 1 can be set to 45 mm, 55 mm or 70 mm, etc.

[0083] Furthermore, with other dimensions unchanged, the smaller R 1 is, the smaller the maximum thickness of the yoke 411 is, resulting in a reduction in the reliability of the motor 2, and R 1The greater the maximum thickness of the yoke portion 411, the greater the rigidity of the motor 2, which can reduce the noise generated during the rotation of the motor 2. However, the greater the thickness of the yoke portion 411, the smaller the area of the stator slots 413, and the smaller the number of turns of the stator winding 42 that the stator slots 413 can accommodate, which will lead to problems such as an increase in the temperature during the operation of the motor 2 and a decrease in the efficiency of the motor 2. The maximum distance R between the outer wall of the yoke portion 411 and the center of the stator 4 1 is set to satisfy: 45mm ≤ R 1 ≤ 70mm. While ensuring the normal operation of the motor 2, it can also improve the structural strength of the motor 2, thereby ensuring the operation reliability of the motor 2, extending the service life of the motor 2, reducing the noise generated during the operation of the motor 2, and improving the user experience.

[0084] The present utility model also proposes a rotary compressor 100.

[0085] The rotary compressor 100 according to an embodiment of the present utility model includes a pump body component 1 and the motor 2 of any one of the above. The rotor 3 includes a rotor core 31. The pump body component 1 includes 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, and the other end of the crankshaft 11 sequentially passes through the first bearing 12, the cylinder 14, and the second bearing 13. The other end of the crankshaft 11 is connected to an eccentric member within the cylinder 14. Wherein, the distance H 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 satisfies:

[0086] Specifically, the rotary compressor 100 is a driven fluid machine that raises low-pressure gas to high-pressure gas and is the heart of the refrigeration system. The rotary compressor 100 can suck in low-temperature and low-pressure refrigerant gas from the suction pipe, and after being compressed by the piston driven by the operation of the motor 2, discharge high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle. The rotary compressor 100 is provided with a housing 5, a pump body component 1, a motor 2, and a liquid reservoir 6.

[0087] Furthermore, the rotor 3 is provided with a rotor core 31 and rotor magnets 32. The motor 2 and the pump body component 1 are both arranged within the housing 5. The liquid reservoir 6 is connected to the pump body component 1. The pump body component 1 is provided with a crankshaft 11, a first bearing 12, a second bearing 13, and a 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 Figures 5 - 6As shown, the number of cylinders 14 can be set to one, two, etc. One end of the crankshaft 11 is connected to the rotor core 31, and the other end of the crankshaft 11 passes through the first bearing 12, the cylinder 14, and the second bearing 13 in sequence. The other end of the crankshaft 11 is connected to the eccentric member inside the cylinder 14, so that when the crankshaft 11 rotates, it can drive the rotor 3 to rotate.

[0088] Among them, the distance between the contact surface where the first bearing 12 cooperates with the cylinder 14 and the side surface of the rotor core 31 facing the first bearing 12 is set to H, with the unit of mm. The maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 is set to R 1 , with the unit of mm. The distance between the inner wall of the stator slot 413 farthest from the center and the center can be set to R 2 , with the unit of mm, and H, R 1 and R 2 satisfy: That is The value can be set to 0.08, 0.3, or 0.43.

[0089] When the distance H between the contact surface where the first bearing 12 cooperates with the cylinder 14 and the side surface 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 component 1 is too large, a swing arm of the rotor 3 will be formed when the rotor 3 operates, which will cause noise when the motor 2 operates. Moreover, there is a cavity formed between the rotor core 31 and the pump body component 1, and resonance will occur between the air in the cavity and the yoke portion 411 of the stator 4. The greater the resonance, the greater the noise of the motor 2. Therefore, H, R 1 and R 2 are set to satisfy: The noise generated by the swing arm of the rotor 3 and the noise generated by the resonance between the air and the yoke portion 411 can be reduced, improving the user experience.

[0090] According to the rotary compressor 100 of the embodiment of the present invention, by setting the maximum distance R between the outer wall of the yoke portion 411 and the center of the stator 4 1 , the maximum distance R between the bottom of the stator slot 413 and the center of the stator 4 2 , the number Q of the stator slots 413, and the number of poles P of the rotor 3 to satisfy: Furthermore, 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 extended, the noise generated during the operation of the motor 2 can be reduced, and the user experience can be improved. The use effect is better and the applicable range is wider.

[0091] In some embodiments, it satisfies:

[0092] Specifically, the maximum distance between the outer wall of the yoke portion 411 and the center of the stator 4 can be set to R 1, unit: mm, the maximum distance between the bottom of the stator slot 413 and the center of the circle can be set to R 2 , unit: mm, the distance between the contact surface where the first bearing 12 mates with the cylinder 14 and the side of the rotor core 31 facing the first bearing 12 is set to H, unit: mm, and satisfies: That is The value of can be set to 0.14, 0.15 or 0.16, etc.

[0093] Furthermore, as Figure 9 shown is the schematic curve diagram between and the rigidity value, and it can be seen from the curve diagram that when the value of is less than or equal to 0.16 and greater than or equal to 0.14, the corresponding rigidity value is relatively high, that is, setting R 1 , R 2 and H to satisfy: can ensure the normal operation of the motor 2 while further improving the structural strength of the motor 2, thereby ensuring the operation reliability of the motor 2, extending the service life of the motor 2, and further reducing the noise generated during the operation of the motor 2, improving the user experience.

[0094] Among them, is the constraint on the ratio between R 1 -R 2 and H. Since the rotary compressor 100 compresses gas by the rotation of the eccentric part of the crankshaft 11, and the crankshaft 11 and the rotor 3 are sleeved with each other. In order to balance the unbalance caused by the eccentric part, balance blocks with different shapes and weights are assembled on the upper and lower end plates of the rotor 3 to adjust the overall balance. Since the cavity between the contact surface where the first bearing 12 mates 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 rotates with the balance block, the gas disturbance in the cavity and the centripetal force generated by the rotation will directly radiate the gas pulsation to the yoke 411. Therefore, increasing the height of H can effectively reduce the influence of gas disturbance, but H cannot be infinitely high because the fixing method of the rotor 3 with the first bearing 12 and the second bearing 13 is a cantilever beam structure. The larger the cavity space, the larger the swing amplitude of the rotor 3 will be, resulting in more serious deterioration of vibration and noise. Therefore, constraints are imposed on R1 - R2 and H.

[0095] In some embodiments, it satisfies: 5mm ≤ R 1 -R 2 ≤ 13mm.

[0096] Specifically, R 1 -R 2 refers to the maximum thickness of the yoke 411, and setting R 1 -R 2 to satisfy: 5mm ≤ R1 -R 2 ≤ 13 mm, that is, R 1 -R 2 can be set to 5 mm, 8 mm, or 13 mm, etc., and R 1 -R 2 The minimum value of is limited by the electrical safety distance, and R 1 -R 2 The larger it is, the greater the maximum thickness of the yoke 411, and thus the greater the rigidity of the motor 2, which can reduce the noise generated during the rotation of the motor 2, and R 1 -R 2 The maximum value of 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 the stator slot 413 can accommodate, which will lead to problems such as an increase in the temperature during the operation of the motor 2 and a decrease in the efficiency of the motor 2. Setting R 1 -R 2 is set to satisfy: 5 mm ≤ R 1 -R 2 ≤ 13 mm. While ensuring the normal operation of the motor 2, it can also improve the structural strength of the motor 2, thereby ensuring the operation reliability of the motor 2, extending the service life of the motor 2, reducing the noise generated during the operation of the motor 2, and improving the user experience.

[0097] In some embodiments, it satisfies: 29 mm ≤ H ≤ 72 mm.

[0098] Specifically, the distance between the contact surface where the first bearing 12 cooperates with the cylinder 14 and the side surface of the rotor core 31 facing the first bearing 12 is set as H, with the unit of mm, and the distance H between the contact surface where the first bearing 12 cooperates with the cylinder 14 and the side surface of the rotor core 31 facing the first bearing 12 is set to satisfy: 29 mm ≤ H ≤ 72 mm, that is, the distance H between the contact surface where the first bearing 12 cooperates with the cylinder 14 and the side surface of the rotor core 31 facing the first bearing 12 can be set to 29 mm, 55 mm, or 72 mm. The distance between the contact surface where the first bearing 12 cooperates with the cylinder 14 and the side surface of the rotor core 31 facing the first bearing 12 is the distance between the rotor core 31 and the pump body component 1. When H is too large, a rotor 3 swing arm will be formed during the operation of the rotor 3, which will lead to noise generated during the operation of the motor 2. Therefore, setting H to satisfy: 29 mm ≤ H ≤ 72 mm can reduce the noise generated by the rotor 3 swing arm and improve the user experience.

[0099] The present utility model also proposes a refrigeration device.

[0100] The refrigeration device according to the embodiment of the present utility model includes the motor 2 of any one of the above or the rotary compressor 100 of any one of the above.

[0101] For the refrigeration equipment according to the embodiments of the present utility model, by setting the maximum distance R between the outer wall of the yoke portion 411 and the center of the stator 4 1 , the maximum distance R between the bottom of the stator slot 413 and the center of the stator 4 2 , the number Q of the stator slots 413 and the number of poles P of the rotor 3 to satisfy: Furthermore, 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, and the user experience can be improved, with better use effects and a wider application range.

[0102] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean 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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0103] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that: include: Rotor; A stator, wherein the rotor is installed in the stator, the stator comprises a stator core and a stator winding, the stator core comprises a yoke and a plurality of teeth, the yoke is annular, a plurality of teeth are spaced and distributed in the circumferential direction of the yoke, two adjacent teeth together with the yoke define a stator slot, and the stator winding is arranged in the stator slot; 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, 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 to 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 to 3, characterized in that: The minimum distance between the inner end of the tooth portion 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 Meets: 24mm≤R3≤40mm.

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

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

11. The motor according to any one of claims 1 to 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: A motor comprising a pump body component and any one of claims 1 to 11, wherein the rotor comprises a rotor core, the pump body component comprises 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 is sequentially passed through the first bearing, the cylinder and the second bearing, and the other end of the crankshaft is connected to an eccentric member in the cylinder; The distance between the contact surface of the first bearing and the cylinder and the side surface of the rotor core facing the first bearing is H, 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: Meets: 5mm≤R1-R2≤13mm.

15. A refrigeration device, characterized in that: The invention comprises the motor according to any one of claims 1 to 11 or the rotary compressor according to any one of claims 12 to 14.

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