Motor, compressor and refrigeration equipment

Abstract

The utility model discloses a motor, a compressor and refrigeration equipment. The motor comprises a stator assembly and a rotor assembly. The stator assembly comprises a stator iron core; the rotor assembly is rotatably arranged in the stator assembly, the rotor assembly comprises a rotor iron core and a rotor magnet, the rotor iron core is provided with a plurality of magnet grooves, the plurality of magnet grooves are arranged at intervals along the circumferential direction of the rotor iron core, each magnet groove extends in the axial direction of the rotor iron core, the outer diameter of the stator iron core is D1, the number of pole pairs of the rotor assembly is P, the number of the rotor magnets under each pole is a, the total width of the rotor magnets is L1, the length of the rotor magnets along the axial direction of the rotor core is h, the residual magnetization intensity of the rotor magnets is br, and # imgabs 0 # imgabs 1 # is satisfied. The motor provided by the utility model is small in size and large in output torque, and meanwhile, the efficiency and the power density of the motor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a motor, a compressor and a refrigeration device. Background Art

[0002] As an important device for converting electrical energy into mechanical energy, the motor plays a key role in many fields such as compressors, refrigeration equipment, and household appliances. The motor is mainly composed of a stator assembly and a rotor assembly. The current in the stator winding generates a rotating magnetic field, which interacts with the rotor magnet in the rotor assembly to generate a rotational torque. Among them, the parameters of each component of the motor have a direct impact on the performance of the motor. In related technologies, the motor occupies a large space and has limited output torque, which seriously affects the efficiency and power density of the motor. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a motor with a small size and a large output torque, and can improve the efficiency and power density of the motor.

[0004] The utility model also provides a compressor, which comprises the above-mentioned motor.

[0005] The utility model also provides a refrigeration device, which comprises the above-mentioned compressor.

[0006] According to an embodiment of the utility model, the motor includes: a stator assembly and a rotor assembly. The stator assembly includes a stator core; the rotor assembly is rotatably disposed in the stator assembly, the rotor assembly includes a rotor core and a rotor magnet, the rotor core has a plurality of magnet slots, the plurality of magnet slots are arranged at intervals along the circumferential direction of the rotor core and each magnet slot extends in the axial direction of the rotor core, wherein the outer diameter of the stator core is D1, the number of pole pairs of the rotor assembly is P, the number of rotor magnets under each pole is a, the total width of the rotor magnet is L1, the length of the rotor magnet along the axial direction of the rotor core is h, the residual magnetization intensity of the rotor magnet is br, and the following conditions are satisfied:

[0007]

[0008] According to the motor of the embodiment of the utility model, a stator assembly having a stator core and a rotor assembly having a rotor core and a rotor magnet are provided, and Among them, the outer diameter of the stator core is D1, the number of pole pairs of the rotor assembly is P, the number of rotor magnets under each pole is a, the total width of the rotor magnet is L1, the length of the rotor magnet along the axial direction of the rotor core is h, and the residual magnetization intensity of the rotor magnet is br. The volume of the motor can be reduced, so that the motor can provide sufficient output torque, improve the motor efficiency and improve the power density of the motor.

[0009] According to some embodiments of the present invention,

[0010] According to some embodiments of the present invention, the outer diameter D1 of the stator core satisfies: 90 mm ≤ D1 ≤ 112 mm.

[0011] According to some embodiments of the present invention, the pole pair number P of the rotor assembly satisfies: P≥5.

[0012] According to some embodiments of the present invention, the stator core has a plurality of stator slots spaced apart along a circumferential direction of the stator core, the number of the stator slots is Q, and Q≥15 is satisfied.

[0013] In some embodiments of the present invention, the stator core has a plurality of stator slots spaced apart along the circumferential direction of the stator core, the number of the stator slots is Q, the number of phases of the motor is m, and the following condition is satisfied: Q / 2mP<1.

[0014] In some embodiments of the present invention, in a cross section perpendicular to the axial direction of the rotor core, the magnet slot is linear, and a line connecting a midpoint of the magnet slot in the length direction and the center of the rotor core is perpendicular to the magnet slot.

[0015] In some embodiments of the present invention, the magnet slot includes a first slot and a second slot, the first slot and the second slot are angled with each other, and the first slot and the second slot are inclined in a direction away from the axis of the rotor core.

[0016] In some embodiments of the present invention, the first slot and the second slot are spaced apart or connected in a direction close to the axis of the rotor core.

[0017] In some embodiments of the present invention, on a cross section perpendicular to the axial direction of the rotor core, the magnet slot includes a first slot, a second slot and a third slot, a line connecting a midpoint of the second slot in the length direction and the center of the rotor core is perpendicular to the second slot, the first slot and the third slot are located on the side of the second slot that is away from the axis of the rotor core, and in a direction away from the axis of the rotor core, the first slot and the third slot are inclined in a direction away from each other.

[0018] In some embodiments of the present invention, one end of the first slot close to the axis of the rotor core and one end of the third slot close to the axis of the rotor core are respectively located at two ends of the length direction of the second slot.

[0019] In some embodiments of the present invention, one end of the first slot close to the rotor core axis and one end of the third slot close to the rotor core axis are respectively located at two ends of the second slot in the length direction and are connected or spaced apart.

[0020] According to some embodiments of the present invention, the magnet slot penetrates the rotor core along the axial direction of the rotor core.

[0021] A compressor according to an embodiment of the utility model includes: the above-mentioned motor.

[0022] According to the compressor of the embodiment of the utility model, a stator assembly having a stator core and a rotor assembly having a rotor core and a rotor magnet are arranged on the motor thereof, and Among them, the outer diameter of the stator core is D1, the number of pole pairs of the rotor assembly is P, the number of rotor magnets under each pole is a, the total width of the rotor magnet is L1, the length of the rotor magnet along the axial direction of the rotor core is h, and the residual magnetization intensity of the rotor magnet is br. The volume of the motor can be reduced, so that the motor can provide sufficient output torque, improve the motor efficiency and the power density of the motor, thereby reducing the volume of the compressor and improving the efficiency of the compressor.

[0023] A refrigeration device according to an embodiment of the utility model includes: the above-mentioned compressor.

[0024] According to the refrigeration device of the embodiment of the utility model, a stator assembly having a stator core and a rotor assembly having a rotor core and a rotor magnet are arranged on the motor of the compressor, and Among them, the outer diameter of the stator core is D1, the number of pole pairs of the rotor assembly is P, the number of rotor magnets under each pole is a, the total width of the rotor magnet is L1, the length of the rotor magnet along the axial direction of the rotor core is h, and the residual magnetization intensity of the rotor magnet is br. The volume of the motor can be reduced, so that the motor can provide sufficient output torque, improve the efficiency of the motor and improve the power density of the motor, thereby reducing the volume of the compressor and improving the efficiency of the compressor, which is conducive to improving the performance of the refrigeration equipment.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 1 is a cross-sectional view of a motor according to an embodiment of the utility model, wherein a=1;

[0028] Figure 2 is a cross-sectional view of a motor according to an embodiment of the utility model, wherein a=2;

[0029] Figure 3 is a cross-sectional view of a motor according to an embodiment of the utility model, wherein a=3;

[0030] Figure 4 is a cross-sectional view of a rotor assembly of a motor according to an embodiment of the utility model;

[0031] Figure 5 is a cross-sectional view of a compressor according to an embodiment of the utility model;

[0032] Figure 6 It is a parameter diagram of the residual magnetization intensity of the rotor magnet of the motor according to an embodiment of the utility model.

[0033] Reference numerals:

[0034] 100. Motor;

[0035] 1. stator assembly; 11. stator core; 111. stator slot; 12. stator winding;

[0036] 2. rotor assembly; 21. rotor core; 22. rotor magnet; 23. magnet slot; 231. first slot; 232. second slot; 233. third slot;

[0037] 200. Compressor;

[0038] 3. Crankshaft;

[0039] 4. Compression components;

[0040] 5. Shell;

[0041] 6. Liquid reservoir;

[0042] 7. Exhaust pipe. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 therefore cannot be understood as a limitation on 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, "multiple" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Reference below Figure 1-Figure 6 A motor 100 according to an embodiment of the present invention is described.

[0047] like Figure 1 and Figure 5 As shown, the motor 100 according to the embodiment of the present invention includes a stator assembly 1 and a rotor assembly 2 .

[0048] Specifically, Figure 1-4 As shown, the stator assembly 1 includes a stator core 11, and the rotor assembly 2 is rotatably arranged in the stator assembly 1. The rotor assembly 2 includes a rotor core 21 and a rotor magnet 22. The rotor core 21 has a plurality of magnet slots 23. The plurality of magnet slots 23 are arranged at intervals along the circumferential direction of the rotor core 21, and each magnet slot 23 extends in the axial direction of the rotor core 21.

[0049] Furthermore, the stator assembly 1 also includes a stator winding 12, and the stator core 11 has a plurality of stator slots 111 spaced apart along the circumferential direction of the stator core 11. The stator winding 12 is wound in the stator slots 111. When the stator winding 12 is supplied with alternating current, the stator core 11 can generate a rotating magnetic field. The rotor magnet 22 is disposed in the magnet slot 23 and extends along the axial direction of the rotor core 21. The rotor magnet 22 can be a permanent magnet or an electromagnet, which can respond to the rotating magnetic field generated by the stator assembly 1, generate magnetic force, and rotate the rotor core 21, thereby providing torque. The plurality of magnet slots 23 are spaced apart along the circumferential direction of the rotor core 21, which helps to improve the distribution of the magnetic field, reduce the non-uniformity of the magnetic field, and thus reduce the hysteresis and eddy current losses during the operation of the motor 100. By arranging the above-mentioned stator assembly 1 and rotor assembly 2, the normal operation of the motor 100 can be achieved.

[0050] The outer diameter of the stator core 11 is D1, the number of pole pairs of the rotor assembly 2 is P, the number of rotor magnets 22 under each pole is a, the total width of the rotor magnet 22 is L1, the length of the rotor magnet 22 along the axial direction of the rotor core 21 is h, the residual magnetization intensity of the rotor magnet 22 is br, and the following conditions are satisfied:

[0051]

[0052] Specifically, for the convenience of expression, S is related to the volume of the rotor magnet 22, a*L1*h is proportional to the total volume of the rotor magnet 22, and the volume of the rotor magnet 22 determines the maximum magnetic energy it can store. A rotor magnet 22 with a larger volume can provide a greater output torque. If the volume of the rotor magnet 22 is too small, that is, the value of a*L1*h is too small, S will be greater than 55. At this time, the volume of the rotor magnet 22 is too small, so that the motor 100 cannot provide sufficient output torque; if the volume of the rotor magnet 22 is too large, that is, the value of a*L1*h is too large, S will be less than 47. At this time, the excessive volume of the rotor magnet 22 increases the overall size of the motor 100, which may affect the application scenario of the motor 100 and reduce the power density of the motor 100.

[0053] By limiting S to between 47 and 55, the number and volume of the rotor magnets 22 can be limited within a reasonable range, ensuring that the size of the motor 100 is not too large, while allowing the motor 100 to provide sufficient output torque and improve the power density of the motor 100.

[0054] Furthermore, S is related to the outer diameter of the stator core 11. If D1 is too large, S will be greater than 55, which will increase the overall size of the motor 100 and reduce the power density of the motor 100, affecting the application scenario of the motor 100. If D1 is too small, S will be less than 47. At this time, the outer diameter of the stator core 11 is too small, which will cause the stator core 11 to be unable to accommodate enough magnetic flux, which is not conducive to the torque output of the motor 100. Limiting S to between 47 and 55 is conducive to limiting the outer diameter of the stator core 11 within a reasonable range, while ensuring the output torque of the motor 100, reducing the volume of the motor 100, thereby facilitating the installation and application of the motor 100.

[0055] Furthermore, S is related to the number of pole pairs of the rotor assembly 2. If P is too small, S will be less than 47. At this time, the number of pole pairs of the rotor assembly 2 is too small, the number of magnet slots 23 and the number of rotor magnets 22 is too small, the output torque of the motor 100 is reduced, and the synchronous speed of the motor 100 will also increase, resulting in increased hysteresis and eddy current losses. At the same time, a small number of pole pairs will lead to uneven magnetic field distribution, which will increase torque fluctuations and cause vibration and noise during the operation of the motor 100. If P is too large, S will be greater than 55. At this time, too many pole pairs will increase the manufacturing cost and size of the motor 100.

[0056] Limiting S to between 47 and 55 is beneficial for limiting the pole pair number of the rotor assembly 2 within a reasonable range, ensuring that the manufacturing cost and size of the motor 100 are not too large, while making the magnetic flux generated by each pole change more smoothly, reducing torque fluctuations, thereby reducing vibration and noise, making the operation of the motor 100 more stable, while reducing the synchronous speed of the motor 100 and reducing hysteresis and eddy current losses, thereby improving the efficiency of the motor 100.

[0057] In addition, S is also related to the residual magnetization of the rotor magnet 22. The rotor magnet 22 with a larger residual magnetization can generate a larger back electromotive force with the stator winding 12 during the rotation process, thereby reducing the current of the stator winding 12, reducing copper loss, and improving the efficiency of the motor 100. It should be noted that, if Figure 6 In the example shown, the residual magnetization intensity of the rotor magnet 22 is measured at a temperature of 20° C., which can control the variables, reduce the influence of temperature on the S value, and improve the accuracy of the control conditions.

[0058] It can be understood that by limiting S to between 47 and 55, the volume of the motor 100 can be reduced, so that the motor 100 can provide sufficient output torque, improve the efficiency of the motor 100, and improve the power density of the motor 100. In addition, the increase in the number of pole pairs of the rotor assembly 2 can effectively reduce the fluctuation of the torque, thereby reducing vibration and noise, and making the operation of the motor 100 more stable.

[0059] According to the motor 100 of the embodiment of the present invention, a stator assembly 1 having a stator core 11 and a rotor assembly 2 having a rotor core 21 and a rotor magnet 22 are provided, and Among them, the outer diameter of the stator core 11 is D1, the number of pole pairs of the rotor assembly 2 is P, the number of rotor magnets 22 under each pole is a, the total width of the rotor magnet 22 is L1, the length of the rotor magnet 22 along the axial direction of the rotor core 21 is h, and the residual magnetization intensity of the rotor magnet 22 is br. The volume of the motor 100 can be reduced, so that the motor 100 can provide sufficient output torque, improve the efficiency of the motor 100, and improve the power density of the motor 100.

[0060] In some embodiments of the present invention, Figure 1-4 As shown, It can be understood that by limiting S between 47 and 50, the above-mentioned beneficial technical effects can be further enhanced, which is more conducive to reducing the volume of the motor 100, so that the motor 100 can provide sufficient output torque, further improving the efficiency and power density of the motor 100.

[0061] In some embodiments of the present invention, Figure 1 As shown, the outer diameter D1 of the stator core 11 satisfies: 90mm≤D1≤112mm. If D1 is greater than 112mm, the overall size of the motor 100 will increase, the volume will be too large, the power density of the motor 100 will be reduced, and the application scenario of the motor 100 will be affected; if D1 is less than 90mm, the stator core 11 will not be able to accommodate enough magnetic flux, which is not conducive to the torque output of the motor 100. When the motor 100 is applied to the compressor 200 and the refrigeration equipment, it will not be able to meet the required cooling capacity requirements. Limiting D1 to between 90mm and 112mm is conducive to limiting the outer diameter of the stator core 11 within a reasonable range, while ensuring the output torque of the motor 100 and meeting the required cooling capacity requirements, reducing the volume of the motor 100, thereby facilitating the installation and application of the motor 100.

[0062] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the number of pole pairs P of the rotor assembly 2 satisfies: P ≥ 5. It can be understood that the number of pole pairs P of the rotor assembly 2 can be 5, 6, 7 or 8, etc. Figure 1In the example shown, the pole pair number P of the rotor assembly 2 is 5. As the pole pair number of the rotor assembly 2 increases, the number of magnet slots 23 and rotor magnets 22 increases accordingly, which can ensure the output torque of the motor 100 and improve the power density. The synchronous speed of the motor 100 is inversely proportional to the pole pair number. The increase in the pole pair number reduces the synchronous speed of the motor 100, which can reduce hysteresis and eddy current losses, thereby improving the efficiency of the motor 100. In addition, the increase in the pole pair number makes the magnetic field distribution more uniform, and the change of the magnetic flux generated by each pole can be smoother, reducing the fluctuation of the torque, thereby reducing vibration and noise, and making the operation of the motor 100 more stable. Of course, the pole pair number of the rotor assembly 2 cannot be too large, otherwise it will lead to an increase in the manufacturing cost and size of the motor 100. In a specific embodiment, the number of pole pairs can be selected and adjusted according to specific application requirements and cost-effectiveness.

[0063] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the stator core 11 has a plurality of stator slots 111 spaced apart in the circumferential direction of the stator core 11, the number of the stator slots 111 is Q, and Q≥15. It is understood that the number Q of the stator slots 111 can be 15, 18, 21 or 24, etc. Figure 1 In the example shown, the number Q of the stator slots 111 is 15. The increase in the number of stator slots 111 can accommodate more stator windings 12, thereby increasing the magnetic flux and improving the output torque of the motor 100. At the same time, increasing the number of stator slots 111 helps to obtain a more uniform magnetic field distribution, reduce the inhomogeneity of the magnetic field, thereby reducing hysteresis and eddy current losses, and thus improving the efficiency of the motor 100.

[0064] In addition, more stator slots 111 can reduce the contribution of a single slot to the magnetic field, thereby reducing torque fluctuations, reducing vibration and noise, and improving the smoothness of the operation of the motor 100. Of course, the number of stator slots 111 cannot be too large, otherwise it will lead to an increase in the manufacturing cost and size of the motor 100. In a specific embodiment, the number of stator slots 111 can be selected and adjusted according to specific application requirements and cost-effectiveness.

[0065] In some embodiments of the present invention, Figure 1 , Figure 2 and Figure 3As shown, the stator core 11 has a plurality of stator slots 111 spaced apart in the circumferential direction of the stator core 11, the number of stator slots 111 is Q, the number of phases of the motor 100 is m, and the condition Q / 2mP<1 is satisfied. Thus, the stator winding 12 can be in the form of concentrated winding, which has a simple structure. The stator winding 12 can be wound between adjacent stator slots 111, making the manufacturing process of the motor 100 simpler, reducing the amount of wire used in the stator winding 12, and helping to reduce manufacturing and assembly costs. The stator winding 12 is in the form of concentrated winding, so that the winding head of the stator winding 12 extending from the stator slot 111 is smaller, that is, when Q / 2mP<1 is satisfied, under the same current conditions, the resistance loss of the stator winding 12 is lower, which helps to improve the efficiency and performance of the motor 100.

[0066] In some embodiments of the present invention, Figure 1 As shown, on a cross section perpendicular to the axial direction of the rotor core 21, the magnet slot 23 is linear, and the line connecting the midpoint of the length direction of the magnet slot 23 and the center of the rotor core 21 is perpendicular to the magnet slot 23. At this time, the number of rotor magnets 22 per pole a is 1, and the rotor magnet 22 is arranged in a direction parallel to the tangent direction of the rotor core 21. The distances between the multiple magnet slots 23 and the center of the rotor core 21 are equal, which facilitates the arrangement of the magnet slots 23 to be spaced apart along the circumferential direction of the rotor core 21, so that the magnetic field distribution is more uniform, and the hysteresis and eddy current losses are reduced, thereby improving the efficiency of the motor 100. Arranging the magnet slots 23 in a linear shape is also convenient for processing, thereby reducing the manufacturing cost of the motor 100.

[0067] In some embodiments of the present invention, Figure 2 As shown, the magnet slot 23 includes a first slot 231 and a second slot 232, the first slot 231 and the second slot 232 are at an angle to each other, and the first slot 231 and the second slot 232 are inclined in a direction away from the axis of the rotor core 21. It can be understood that at this time, the number of rotor magnets 22 per pole is 2, and the slot of the rotor magnet 22 is in a "V" shape on a cross section perpendicular to the axial direction of the rotor core 21. Two rotor magnets 22 can be placed in a single magnet slot 23, and the density of the magnetic field is relatively large, which can increase the rotational torque of the rotor core 21; and the structure of the magnet slot 23 is relatively simple, which is convenient for processing the slot of the rotor magnet 22.

[0068] In some embodiments of the present invention, Figure 2As shown, the first slot 231 and the second slot 232 are spaced or connected in the direction close to the axis of the rotor core 21. It can be understood that the first slot 231 and the second slot 232 are connected in the direction close to the axis of the rotor core 21, which can form a continuous magnetic field, enhance the magnetic field strength, and improve the output torque and efficiency of the motor 100. Or the first slot 231 and the second slot 232 are spaced in the direction close to the axis of the rotor core 21, which can effectively reduce the magnetic leakage phenomenon and reduce the energy loss of the motor 100 during operation, thereby improving the efficiency and performance of the motor 100. In addition, the rotor magnets 22 placed at intervals can also reduce the manufacturing cost and material consumption of the motor 100.

[0069] In some embodiments of the present invention, Figure 3 As shown, on a cross section perpendicular to the axial direction of the rotor core 21, the magnet slot 23 includes a first slot 231, a second slot 232 and a third slot 233, a line connecting the midpoint of the length direction of the second slot 232 and the center of the rotor core 21 is perpendicular to the second slot 232, the first slot 231 and the third slot 233 are located on the side of the second slot 232 away from the axis of the rotor core 21, and in the direction away from the axis of the rotor core 21, the first slot 231 and the third slot 233 are inclined in a direction away from each other. It can be understood that at this time, the number of rotor magnets 22 per pole is 3, and on a cross section perpendicular to the axial direction of the rotor core 21, the magnet slot 23 is in a "U" shape, and three rotor magnets 22 can be placed in a single magnet slot 23, the density of the magnetic field is large, and the torque of the rotor core 21 can be increased.

[0070] In some embodiments of the present invention, Figure 3 As shown, one end of the first slot 231 close to the axis of the rotor core 21 and one end of the third slot 233 close to the axis of the rotor core 21 are respectively located at two ends of the length direction of the second slot 232. When installing the rotor magnet 22, the rotor magnet 22 in the second slot 232 can be installed first, and then the rotor magnets 22 in the first slot 231 and the third slot 233 can be installed together. The installation of the rotor magnet 22 is relatively convenient, and the processing process of the magnet slot 23 is relatively simple.

[0071] In some embodiments of the present invention, Figure 3As shown, one end of the first slot 231 close to the axis of the rotor core 21 and one end of the third slot 233 close to the axis of the rotor core 21 are respectively located at both ends of the length direction of the second slot 232 and are connected or spaced apart. It can be understood that one end of the first slot 231 close to the axis of the rotor core 21 and one end of the third slot 233 close to the axis of the rotor core 21 are respectively located at both ends of the length direction of the second slot 232 and are connected, which can form a continuous magnetic field, enhance the magnetic field strength, and improve the output torque and efficiency of the motor 100. Or one end of the first slot 231 close to the axis of the rotor core 21 and one end of the third slot 233 close to the axis of the rotor core 21 are respectively located at both ends of the length direction of the second slot 232 and are spaced apart, which can effectively reduce the magnetic leakage phenomenon, reduce the energy loss of the motor 100 during operation, and thus improve the efficiency and performance of the motor 100. In addition, the magnets placed at intervals can also reduce the manufacturing cost and material consumption of the motor 100.

[0072] In some embodiments of the present invention, Figure 4 As shown, the magnet slot 23 penetrates the rotor core 21 along the axial direction of the rotor core 21. In the cross section perpendicular to the axial direction of the rotor core 21, the magnet slot 23 is in an "I" shape, which makes it easy to assemble the rotor magnet 22 into the magnet slot 23, which can reduce the difficulty of operation and thus improve the assembly efficiency. In addition, the penetrating magnet slot 23 can provide a more direct and continuous magnetic flux path, thereby enhancing the magnetic flux and increasing the magnetic field strength of the motor 100, thereby increasing the output torque of the motor 100. At the same time, the penetrating magnet slot 23 helps to achieve a more uniform magnetic field distribution and reduce the inhomogeneity of the magnetic field, thereby reducing hysteresis and eddy current losses and improving the efficiency of the motor 100.

[0073] The compressor 200 according to an embodiment of the present invention is described below.

[0074] The compressor 200 according to the embodiment of the present invention includes the above-mentioned motor 100 .

[0075] Specifically, Figure 1-4 As shown, combined Figure 5 The compressor 200 may be a rotary compressor, which has the advantages of high efficiency, stability, and reliability, can reduce the loss of energy conversion, ensure reliable operation, and is quieter during operation, can reduce vibration and noise, and is conducive to improving the user experience. For example, the rotary compressor may be a single-cylinder rotary compressor.

[0076] Specifically, the compressor 200 may be provided with a motor 100, a crankshaft 3 and a compression assembly 4. The motor 100 includes a stator assembly 1 and a rotor assembly 2. The stator assembly 1 includes a stator core 11. The rotor assembly 2 is rotatably disposed in the stator assembly 1. One end of the crankshaft 3 is connected to the rotor assembly 2. The compression assembly 4 is connected and matched with the other end of the crankshaft 3. The rotor assembly 2 includes a rotor core 21 and a rotor magnet 22. The rotor core 21 has a plurality of magnet slots 23. The plurality of magnet slots 23 are arranged at intervals along the circumferential direction of the rotor core 21 and each magnet slot 23 extends in the axial direction of the rotor core 21.

[0077] The stator assembly 1 further includes a stator winding 12, and the stator core 11 has a plurality of stator slots 111 spaced apart along the circumferential direction of the stator core 11. The stator winding 12 is wound in the stator slots 111. When the stator winding 12 is supplied with alternating current, the stator core 11 can generate a rotating magnetic field. The rotor magnet 22 is disposed in the magnet slot 23 and extends along the axial direction of the rotor core 21. The rotor magnet 22 can be a permanent magnet or an electromagnet, which can respond to the rotating magnetic field generated by the stator assembly 1, generate magnetic force, and rotate the rotor core 21, thereby providing torque. Furthermore, the rotation of the rotor core 21 can drive the crankshaft 3 to rotate along the central axis of the rotor core 21, and the rotation of the crankshaft 3 can drive the compression assembly 4 to work, so as to transmit the output force of the motor 100 to the compression assembly 4, so as to realize the operation of the compressor 200.

[0078] The outer diameter of the stator core 11 is D1, the number of pole pairs of the rotor assembly 2 is P, the number of rotor magnets 22 under each pole is a, the total width of the rotor magnet 22 is L1, the length of the rotor magnet 22 along the axial direction of the rotor core 21 is h, the residual magnetization intensity of the rotor magnet 22 is br, and the following conditions are satisfied:

[0079]

[0080] It can be understood that by limiting S to between 47 and 55, the volume of the motor 100 can be reduced, so that the motor 100 can provide sufficient output torque, improve the efficiency of the motor 100 and improve the power density of the motor 100. In addition, the miniaturization requirement of the compressor 200 can be met, the volume of the compressor 200 can be reduced and the efficiency of the compressor 200 can be improved. In addition, the increase in the number of pole pairs of the rotor assembly 2 can effectively reduce the fluctuation of the torque, thereby reducing vibration and noise, making the operation of the motor 100 more stable, thereby enhancing the stability of the operation of the compressor 200.

[0081] According to the compressor 200 of the embodiment of the utility model, a stator assembly 1 having a stator core 11 and a rotor assembly 2 having a rotor core 21 and a rotor magnet 22 are arranged on the motor 100, and the compressor 200 is defined. Among them, the outer diameter of the stator core 11 is D1, the number of pole pairs of the rotor assembly 2 is P, the number of rotor magnets 22 under each pole is a, the total width of the rotor magnet 22 is L1, the length of the rotor magnet 22 along the axial direction of the rotor core 21 is h, and the residual magnetization intensity of the rotor magnet 22 is br. The volume of the motor 100 can be reduced, so that the motor 100 can provide sufficient output torque, improve the efficiency of the motor 100, and improve the power density of the motor 100, thereby reducing the volume of the compressor 200 and improving the efficiency of the compressor 200.

[0082] In some embodiments, Figure 5 As shown, the compressor 200 includes a shell 5, and the compression component 4, the motor 100 and the crankshaft 3 are all arranged in the shell 5. The shell 5 can protect the compression component 4, the motor 100 and the crankshaft 3 to avoid damage caused by exposure of the compression component 4, the motor 100 and the crankshaft 3, and the shell 5 can achieve sealing of the compression component 4, the motor 100 and the crankshaft 3, thereby ensuring the normal operation of the compressor 200 and helping to increase the service life.

[0083] In some embodiments, Figure 5 As shown, the compressor 200 further includes a liquid reservoir 6, which is connected to the compression assembly 4. When the compressor 200 is working, the low-temperature and low-pressure refrigerant to be compressed can enter the compression assembly 4 through the liquid reservoir 6, and the low-temperature and low-pressure refrigerant is compressed by the compression assembly 4 to form a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant can be discharged from the shell 5 through the exhaust pipe 7 connected to the shell 5, thereby realizing the compression work of the compressor 200. At the same time, the refrigerant can be separated into gas and liquid through the liquid reservoir 6, ensuring that the refrigerant is reliably compressed in the compression assembly 4, and ensuring that the compressor 200 works reliably.

[0084] The following describes a refrigeration device according to an embodiment of the present utility model.

[0085] The refrigeration device according to the embodiment of the present invention includes the compressor 200 mentioned above.

[0086] According to the refrigeration device of the embodiment of the utility model, a stator assembly 1 having a stator core 11 and a rotor assembly 2 having a rotor core 21 and a rotor magnet 22 are arranged on the motor 100 of the compressor 200, and the Among them, the outer diameter of the stator core 11 is D1, the number of pole pairs of the rotor assembly 2 is P, the number of rotor magnets 22 under each pole is a, the total width of the rotor magnet 22 is L1, the length of the rotor magnet 22 along the axial direction of the rotor core 21 is h, and the residual magnetization intensity of the rotor magnet 22 is br. The volume of the motor 100 can be reduced, so that the motor 100 can provide sufficient output torque, improve the efficiency of the motor 100, and improve the power density of the motor 100, thereby reducing the volume of the compressor 200 and improving the efficiency of the compressor 200, which is conducive to improving the performance of the refrigeration equipment.

[0087] The compressor 200 and other structures and operations of the refrigeration device according to the embodiment of the utility model are well known to those skilled in the art and will not be described in detail here.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that: include: A stator assembly, the stator assembly comprising a stator core; A rotor assembly, the rotor assembly is rotatably disposed in the stator assembly, the rotor assembly comprises a rotor core and a rotor magnet, the rotor core has a plurality of magnet slots, the plurality of magnet slots are arranged at intervals along the circumferential direction of the rotor core and each of the magnet slots extends in the axial direction of the rotor core, The outer diameter of the stator core is D1, the number of pole pairs of the rotor assembly is P, the number of rotor magnets under each pole is a, the total width of the rotor magnet is L1, the length of the rotor magnet along the axial direction of the rotor core is h, the residual magnetization intensity of the rotor magnet is br, and the following conditions are satisfied:

2. The motor according to claim 1, characterized in that 3. The motor according to claim 1, characterized in that The outer diameter D1 of the stator core satisfies: 90 mm ≤ D1 ≤ 112 mm.

4. The motor according to claim 1, characterized in that The pole pair number P of the rotor assembly satisfies: P≥5.

5. The motor according to claim 1, characterized in that The stator core has a plurality of stator slots spaced apart along a circumferential direction of the stator core, the number of the stator slots is Q, and Q≥15 is satisfied.

6. The motor according to any one of claims 1 to 5, characterized in that: The stator core has a plurality of stator slots spaced apart along a circumferential direction of the stator core, the number of the stator slots is Q, the number of phases of the motor is m, and the following condition is satisfied: Q / 2mP<1.

7. The motor according to any one of claims 1 to 5, characterized in that: In a cross section perpendicular to the axial direction of the rotor core, the magnet slot is linear, and a line connecting a midpoint in the length direction of the magnet slot and a center of the rotor core is perpendicular to the magnet slot.

8. The motor according to any one of claims 1 to 5, characterized in that: The magnet slots include a first slot and a second slot, the first slot and the second slot are angled with each other, and the first slot and the second slot are inclined in a direction away from each other in a direction away from the axis of the rotor core.

9. The motor according to claim 8, characterized in that The first slot and the second slot are spaced apart or connected in a direction close to the axis of the rotor core.

10. The motor according to any one of claims 1 to 5, characterized in that: On a cross section perpendicular to the axial direction of the rotor core, the magnet slot includes a first slot, a second slot and a third slot, a line connecting a midpoint of the second slot in a length direction and a center of the rotor core is perpendicular to the second slot, the first slot and the third slot are located on a side of the second slot that is away from the axis of the rotor core, and in a direction away from the axis of the rotor core, the first slot and the third slot are inclined in a direction away from each other.

11. The motor according to claim 10, characterized in that One end of the first slot close to the axis of the rotor core and one end of the third slot close to the axis of the rotor core are respectively located at two ends of the length direction of the second slot.

12. The motor according to claim 11, characterized in that One end of the first slot close to the axis of the rotor core and one end of the third slot close to the axis of the rotor core are respectively located at two ends of the length direction of the second slot, connected or spaced apart.

13. The motor according to claim 1, characterized in that The magnet slot penetrates the rotor core along the axial direction of the rotor core.

14. A compressor, characterized in that: Comprising a motor according to any one of claims 1-13.

15. A refrigeration device, characterized in that: Comprising a compressor according to claim 14.

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