Rotor lamination assembly, rotor, motor, compressor and air conditioner

Abstract

The utility model discloses a rotor lamination assembly, a rotor, a motor, a compressor and an air conditioner, and the rotor lamination assembly comprises a first rotor punching sheet which is provided with a plurality of first permanent magnet grooves suitable for accommodating permanent magnets, a plurality of first circulation holes and a plurality of communication parts, at least one first permanent magnet groove is communicated with the corresponding first circulating hole through a communication part; the minimum width of the communication part is w1, the minimum width of the first permanent magnet groove is w2, and w1 / w2 is larger than or equal to 0.1 and smaller than or equal to 1. According to the rotor lamination assembly designed by the utility model, the first rotor punching sheet is provided with the plurality of first permanent magnet grooves, the plurality of first circulation holes and the plurality of communication parts, so that the heat of the whole permanent magnet is dissipated when the motor works, and the minimum width w1 of the communication parts and the minimum width w2 of the first permanent magnet grooves meet the condition that w1 / w2 is more than or equal to 0.1 and less than or equal to 1. Therefore, the rotor lamination assembly has high structural strength and has a good heat dissipation effect on the permanent magnets at the same time.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a rotor lamination assembly, a rotor, a motor, a compressor and an air conditioner. Background Art

[0002] In the related technologies, the compressor, as the power source of the air conditioner, bears the main power consumption of the air conditioning system. The motor is the driving source of the compressor. How to further improve the efficiency of the motor has been the main issue in the industry in recent years. In the existing technologies, in the compressor, the motor continuously works in a high-temperature environment. The working environment and state of each component are greatly different from that at normal temperature. The magnetic properties of the permanent magnet will decrease when the temperature rises, resulting in lower energy efficiency of the motor, which in turn leads to lower energy efficiency of the compressor. 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, one purpose of the utility model is to propose a rotor lamination assembly. According to the rotor lamination assembly designed by the utility model, a plurality of first permanent magnet slots, a plurality of first flow holes and a plurality of connecting parts are provided on the first rotor punching, so that the heat dissipation of the permanent magnet as a whole is realized when the motor is working, and the minimum width w1 of the connecting part and the minimum width w2 of the first permanent magnet slot satisfy: 0.1≤w1 / w2≤1, so that the rotor lamination assembly has a good heat dissipation effect on the permanent magnet while having a strong structural strength.

[0004] The utility model also provides a rotor having the rotor lamination assembly.

[0005] The utility model also provides a motor with the rotor.

[0006] The utility model also provides a compressor having the motor.

[0007] The utility model also provides an air conditioner with the compressor.

[0008] According to the utility model, the rotor lamination assembly includes: a first rotor punching, on which a plurality of first permanent magnet slots suitable for accommodating permanent magnets, a plurality of first flow holes and a plurality of connecting parts are arranged, the first flow holes, the connecting parts and the first permanent magnet slots are distributed in sequence radially away from the center of the first rotor punching, at least one of the first permanent magnet slots is connected to the corresponding first flow hole through the connecting part; wherein the minimum width of the connecting part is w1, and the minimum width of the permanent magnet installation area in the first permanent magnet slot is w2, satisfying: 0.1≤w1 / w2≤1.

[0009] According to the rotor lamination assembly of the utility model, by arranging a plurality of first permanent magnet slots, a plurality of first flow holes and a plurality of connecting parts on the first rotor punching sheet, at least one first permanent magnet slot is connected with the corresponding first flow hole through the connecting part, so that when the rotor lamination assembly rotates, the air located in the first flow hole can enter the first permanent magnet slot through the connecting part to dissipate the heat of the permanent magnet, thereby enhancing the magnetic properties of the permanent magnet when the motor is working, improving the energy efficiency of the motor, and thus enhancing the energy efficiency of the compressor. At the same time, the minimum width of the connecting part is w1, and the minimum width of the first permanent magnet slot is w2, satisfying: 0.1≤w1 / w2≤1, thereby achieving that the rotor lamination assembly has a good heat dissipation effect on the permanent magnet while having a strong structural strength.

[0010] According to some embodiments of the utility model, it also includes: a second rotor punching sheet, the second rotor punching sheet is provided with a plurality of second permanent magnet slots, the plurality of second permanent magnet slots correspond one-to-one to the plurality of first permanent magnet slots, the second rotor punching sheet is also provided with a second flow hole, and the projections of the first rotor punching sheet and the second rotor punching sheet in the axial direction do not completely overlap.

[0011] According to some embodiments of the present invention, in an axial projection, the second circulation hole at least partially overlaps with the first circulation hole.

[0012] According to some embodiments of the present invention, the second flow hole is configured as one, and at least part of the projections of the plurality of first flow holes in the axial direction are located inside the second flow hole.

[0013] According to some embodiments of the present invention, the radius of the second flow hole is r1, and the distance from the outer edge of the first flow hole to the center of the first rotor punching is r2, satisfying: r1≥r2.

[0014] According to some embodiments of the present invention, the second flow holes are configured in plurality, the plurality of second flow holes correspond one-to-one to the plurality of first flow holes, respectively, and in axial projection, at least part of the first flow holes overlaps with the second flow holes.

[0015] According to some embodiments of the present invention, a plurality of conducting parts are further provided on the second rotor punching sheet, and at least one of the second permanent magnet slots is connected to the corresponding second flow hole through the conducting part.

[0016] According to some embodiments of the present invention, a plurality of first rivet holes are provided on the first rotor punching sheet, and the first rivet hole is provided between at least two adjacent first permanent magnet slots.

[0017] According to some embodiments of the present invention, the total axial length of the plurality of first rotor punchings is h1, and the axial length of the rotor lamination assembly is h2, satisfying: 0.35≤h1 / h2≤0.95.

[0018] According to some embodiments of the present invention, the thicknesses of the plurality of first rotor punching sheets are the same.

[0019] According to some embodiments of the present invention, at least one of the first rotor punching sheets is stacked in the axial direction to form a first punching sheet group, and the first punching sheet group is constructed in multiple pieces and the thicknesses are L1, L2, L3, ..., Ln, respectively, satisfying: h1 = L1 + L2 + L3 + ... + Ln.

[0020] According to some embodiments of the present invention, in the axial direction, the first rotor punching sheets and the second rotor punching sheets are alternately arranged.

[0021] The following briefly describes a rotor according to another embodiment of the present invention.

[0022] The rotor according to the utility model includes the rotor lamination assembly described in any one of the above embodiments. Since the rotor according to the utility model is provided with the rotor lamination assembly of the above embodiments, the rotor has a better heat dissipation effect on the permanent magnet, thereby improving the magnetic properties of the permanent magnet when the rotor rotates.

[0023] According to some embodiments of the present invention, it also includes: an end plate, which is arranged at at least one end of the rotor stack assembly in the axial direction, and is provided with a through hole penetrating in the thickness direction. In the axial projection, at least a part of the through hole overlaps with the first flow hole.

[0024] The following briefly describes a motor according to another embodiment of the present invention.

[0025] The motor according to the utility model includes the rotor described in any one of the above embodiments. Since the motor according to the utility model is provided with the rotor of the above embodiment, the permanent magnet of the motor has good heat dissipation effect, thereby improving the energy efficiency of the motor.

[0026] The following briefly describes a compressor according to another embodiment of the present invention.

[0027] The compressor according to the utility model includes the motor described in any one of the above embodiments. Since the compressor according to the utility model is provided with the motor of the above embodiment, the motor of the compressor has good energy efficiency, so that the energy efficiency of the compressor is good, and the oil discharge rate of the compressor can also be improved, thereby improving the reliability of the compressor.

[0028] The following briefly describes an air conditioner according to another embodiment of the present invention.

[0029] The air conditioner according to the utility model includes the compressor described in any one of the above embodiments. Since the air conditioner according to the utility model is provided with the compressor of the above embodiments, the compressor of the air conditioner has high reliability, so that the air conditioner has a good effect.

[0030] 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

[0031] 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:

[0032] Figure 1 It is a schematic diagram of a plurality of first permanent magnet slots, a plurality of connecting parts and a plurality of first flow holes in a first rotor punching sheet according to an embodiment of the utility model being connected one by one;

[0033] Figure 2 It is a schematic diagram of a part of the first permanent magnet slots in the first rotor punching sheet being connected to the corresponding first flow holes through a connecting portion according to an embodiment of the utility model;

[0034] Figure 3 It is a schematic diagram of providing a second flow hole in the second rotor punching according to an embodiment of the utility model;

[0035] Figure 4 is a cross-sectional view of a second rotor punching sheet provided with a second flow hole and stacked with a first rotor punching sheet according to an embodiment of the utility model;

[0036] Figure 5 It is a schematic diagram of a second rotor punching sheet provided with a plurality of second flow holes according to an embodiment of the utility model;

[0037] Figure 6 is a cross-sectional view of a second rotor punching provided with a plurality of second flow holes and a first rotor punching stacked according to an embodiment of the utility model;

[0038] Figure 7 is a schematic diagram of a rotor according to an embodiment of the utility model;

[0039] Figure 8 is a schematic diagram of a rotor provided with an end plate according to an embodiment of the utility model;

[0040] Fig. 9 is a cross-sectional view of a compressor according to an embodiment of the utility model;

[0041] Fig.10 It is a graph showing the change of rotor lamination assembly strength, permanent magnet temperature and w1 / w2 according to an embodiment of the utility model;

[0042] Fig.11 It is a graph showing the change of rotor lamination assembly strength and permanent magnet temperature and h1 / h2 according to an embodiment of the utility model;

[0043] Fig.12 It is a schematic diagram of an air conditioner provided with a compressor according to an embodiment of the utility model.

[0044] Reference numerals: 10000, air conditioner; 1000, compressor; 100, motor; 200, pump body; 1, rotor lamination assembly; 2, stator; 3, permanent magnet;

[0045] 10. first rotor punching sheet; 11. first permanent magnet slot; 111. first slot section; 112. second slot section; 12. first flow hole; 13. connecting portion; 14. first rivet hole;

[0046] 20. Second rotor punching sheet; 21. Second permanent magnet slot; 22. Second flow hole;

[0047] 30. end plate; 31. via hole; 32. through hole; 40. balance block; DETAILED DESCRIPTION

[0048] 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.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the related technologies, the compressor, as the power source of the air conditioner, bears the main power consumption of the air conditioning system. The motor is the driving source of the compressor. How to further improve the efficiency of the motor has been the main issue in the industry in recent years. In the existing technologies, in the compressor, the motor continuously works in a high-temperature environment. The working environment and state of each component are greatly different from that at normal temperature. The magnetic properties of the permanent magnet will decrease when the temperature rises, resulting in lower energy efficiency of the motor, which in turn leads to lower energy efficiency of the compressor.

[0054] Reference below Figure 1-Figure 12 A rotor lamination assembly 1 according to an embodiment of the present invention is described.

[0055] like Figure 1-Figure 12As shown, the rotor lamination assembly 1 according to the utility model comprises: a first rotor punching 10, on which a plurality of first permanent magnet slots 11 suitable for accommodating permanent magnets 3, a plurality of first flow holes 12 and a plurality of connecting parts 13 are arranged, the first flow holes 12, the connecting parts 13 and the first permanent magnet slots 11 are sequentially distributed away from the center of the first rotor punching 10 in the radial direction, at least one first permanent magnet slot 11 is connected with the corresponding first flow hole 12 through the connecting part 13; wherein the minimum width of the connecting part 13 is w1, and the minimum width of the permanent magnet installation area in the first permanent magnet slot 11 is w2, satisfying: 0.1≤w1 / w2≤1. It is worth noting that the first permanent magnet slot 11 comprises an installation section and an air passage section, the installation section is used to install the permanent magnet, the air passage section is connected with the installation section and is suitable for air to flow through to dissipate heat from the permanent magnet, and the minimum width of the installation section is w2.

[0056] The distances between the first permanent magnet slot 11, the connecting portion 13 and the first flow hole 12 and the center of the first rotor punching 10 are d1, d2, and d3, respectively, and satisfy: d1>d2>d3, and the two ends of the connecting portion 13 extend toward the first flow hole 12 and the first permanent magnet slot 11, respectively. Here, the extension direction of the connecting portion 13 can be parallel to the radial direction of the first rotor punching 10, or an angle can be formed between the extension direction of the connecting portion 13 and the radial direction of the first rotor punching 10, or the two ends of the connecting portion 13 are bent and extend toward the first flow hole 12 and the first permanent magnet slot 11, respectively, and there is no restriction here.

[0057] In some embodiments, a plurality of first permanent magnet slots 11 correspond to a plurality of first circulation holes 12 and a plurality of connecting parts 13, respectively, and each first permanent magnet slot 11 is connected to a corresponding first circulation hole 12 through a corresponding connecting part 13; in other embodiments, a plurality of first permanent magnet slots 11 are connected to one or more first circulation holes 12 through a plurality of connecting parts 13; in other embodiments, at least one first permanent magnet slot 11 is connected to a plurality of first circulation holes 12 through a plurality of connecting parts 13, which is not limited here. It is worth noting that the number of first permanent magnet slots 11, the number of connecting parts 13, and the number of first circulation holes 12 can be the same or different, which is not limited here.

[0058] It can be understood that at least one first rotor punching 10 is stacked in the thickness direction to form a rotor lamination assembly 1, and the projections of at least one first rotor punching 10 in the axial direction overlap with each other. When the motor 100 is working, the rotor lamination assembly 1 can be rotated. The first permanent magnet slots 11 of at least one first rotor punching 10 are jointly constructed as an installation channel, and the installation channel is used to install the permanent magnet 3. The first flow holes 12 of at least one first rotor punching 10 are jointly constructed as an air passage, and air can enter the air passage. The air located in the air passage rotates with the rotor lamination assembly 1 and enters the installation channel through the connecting portion 13 under the action of centrifugal force, thereby achieving heat dissipation of the permanent magnet 3, thereby improving the magnetic properties of the permanent magnet 3 when the motor 100 is working.

[0059] It is worth mentioning that air can enter the air passage, and the air in the air passage enters the corresponding first permanent magnet slot 11 through the corresponding connecting parts 13, so as to achieve uniform heat dissipation of the permanent magnet 3 in the axial direction. The heat dissipation effect of the permanent magnet 3 is better, and at the same time, it can avoid heat accumulation in the axial center position of the permanent magnet 3 when the motor 100 is working, thereby improving the overall heat dissipation capacity of the permanent magnet 3.

[0060] It can be understood that the larger the widths of the connecting portion 13 and the first permanent magnet slot 11 opened in the first rotor punching 10, the lower the structural strength of the first rotor punching 10. Therefore, the minimum width of the connecting portion 13 of the present application is w1, and the minimum width of the first permanent magnet slot 11 is w2, satisfying: 0.1≤w1 / w2≤1, so that the first rotor punching 10 can enhance the circulation efficiency of air entering the first permanent magnet slot 11 while ensuring the structural strength, thereby enhancing the heat dissipation effect of the first permanent magnet slot 11.

[0061] When w1 / w2 is less than 0.1, the width of the circulation portion is small, and the efficiency of air entering the first permanent magnet slot 11 through the circulation portion is low, resulting in a low heat dissipation capacity of the permanent magnet 3. It is worth noting that when w1 / w2 is less than 0.1, the structural strength of the first rotor punching sheet 10 is not significantly improved, but the heat dissipation effect on the permanent magnet 3 is sharply reduced; when w1 / w2 is greater than 1, the heat dissipation effect of the permanent magnet 3 is not significantly improved, but the structural strength of the first rotor punching sheet 10 is sharply reduced.

[0062] According to the rotor lamination assembly 1 involved in the utility model, by arranging a plurality of first permanent magnet slots 11, a plurality of first flow holes 12 and a plurality of connecting parts 13 on the first rotor punching 10, at least one first permanent magnet slot 11 is connected with the corresponding first flow hole 12 through the connecting part 13, so that when the rotor lamination assembly 1 rotates, the air located in the first flow hole 12 can enter the first permanent magnet slot 11 through the connecting part 13 to dissipate heat for the permanent magnet 3, thereby enhancing the magnetic properties of the permanent magnet 3 when the motor 100 is working, improving the energy efficiency of the motor 100, and thus enhancing the energy efficiency of the compressor 1000, and at the same time, the minimum width of the connecting part 13 is w1, and the minimum width of the first permanent magnet slot 11 is w2, satisfying: 0.1≤w1 / w2≤1, so that the rotor lamination assembly 1 has a good heat dissipation effect on the permanent magnet 3 while having a strong structural strength.

[0063] According to some embodiments of the present invention, Figure 3-Figure 4 As shown, the rotor lamination assembly 1 also includes: a second rotor punching 20, the second rotor punching 20 is provided with a plurality of second permanent magnet slots 21, the plurality of second permanent magnet slots 21 correspond one-to-one to the plurality of first permanent magnet slots 11, and a second flow hole 22 is also provided on the second rotor punching 20, and the projections of the first rotor punching 10 and the second rotor punching 20 do not completely overlap in the axial direction.

[0064] In some embodiments, the multiple second permanent magnet slots 21 on the second rotor punching 20 correspond one-to-one to the multiple first permanent magnet slots 11 of the first rotor punching 10 and their axial projections overlap with each other. Thus, after the first rotor punching 10 and the second rotor punching 20 are stacked in the axial direction, the first permanent magnet slots 11 and the second permanent magnet slots 21 are jointly constructed as an installation channel for accommodating the permanent magnet 3, which facilitates the assembly of the permanent magnet 3.

[0065] The second rotor punching 20 is also provided with a second flow hole 22 , which is used to prevent the second rotor punching 20 from blocking the first flow hole 12 in the axial direction, thereby preventing air from entering the first flow hole 12 , and further preventing the second rotor punching 20 from reducing the heat dissipation effect of the permanent magnet 3 .

[0066] It can be understood that the first rotor punching 10 and the second rotor punching 20 are stacked in the axial direction to form the rotor lamination assembly 1. If the projections of the first rotor punching 10 and the second rotor punching 20 in the axial direction overlap, the structural strengths of the various points in the axial direction of the rotor lamination assembly 1 are consistent, resulting in a low overall structural strength of the rotor lamination assembly 1. Therefore, the present application avoids the above phenomenon by setting the projections of the first rotor punching 10 and the second rotor punching 20 in the axial direction to not completely overlap, thereby improving the overall structural strength of the rotor lamination assembly 1.

[0067] It is worth mentioning that the first rotor punching 10 of the present application is provided with a first permanent magnet slot 11, a first circulation portion and a connecting portion 13 for heat dissipation of the permanent magnet 3, the second rotor punching 20 is provided with a second permanent magnet slot 21 to avoid the second rotor punching 20 interfering with the assembly of the permanent magnet 3, and the second rotor punching 20 is provided with a second circulation hole 22 to avoid the second rotor punching 20 blocking the air from entering the first circulation hole 12. Therefore, the first rotor punching 10 of the present application is mainly used for heat dissipation of the permanent magnet 3, and the second rotor punching 20 is mainly used to enhance the structural strength of the rotor lamination assembly 1, that is, the first rotor punching 10 cooperates with the second rotor punching 20 so that the rotor lamination assembly 1 enhances the heat dissipation effect of the permanent magnet 3 while ensuring its own structural strength.

[0068] According to some embodiments of the present invention, Figure 1-Figure 6 As shown, in the axial projection, the second flow hole 22 at least partially overlaps with the first flow hole 12. In some embodiments, in the axial projection, the first flow hole 12 and the second flow hole 22 may at least partially overlap, or the first flow hole 12 may be located inside the second flow hole 22, or the second flow hole 22 may be located inside the first flow hole 12, so as to ensure that the air outside the rotor lamination assembly 1 can enter the first flow hole 12 through the second flow hole 22, and there is no limitation here.

[0069] According to some embodiments of the present invention, Figure 1-Figure 6 As shown, a plurality of first permanent magnet slots 11, a plurality of first flow holes 12 and a plurality of connecting parts 13 are arranged in one-to-one correspondence, and each first permanent magnet slot 11 is connected with the corresponding first flow hole 12 through the corresponding connecting part 13, thereby, the air in each first flow hole 12 can enter the corresponding first permanent magnet slot 11 through the corresponding connecting part 13, so as to dissipate heat for the corresponding permanent magnet 3, and the heat dissipation capacity of each permanent magnet 3 can be guaranteed, so that the magnetic properties of each permanent magnet 3 inside the motor 100 can be improved when the motor 100 is working, thereby improving the energy efficiency of the motor 100.

[0070] According to some embodiments of the present invention, Figure 1-Figure 6 As shown, the first circulation hole 12 includes: a first through hole and a second through hole, the first through hole and the second through hole are staggered in the circumferential direction, and the multiple first permanent magnet slots 11 are respectively arranged in one-to-one correspondence with the multiple first through holes and the multiple second through holes, and the first through hole is connected with the corresponding first permanent magnet slots 11 through the connecting part 13.

[0071] It can be understood that the air in each first through hole can enter the corresponding first permanent magnet slot 11 through the corresponding connecting portion 13, thereby dissipating heat for the corresponding permanent magnet 3 to ensure the heat dissipation effect of some permanent magnets 3. The fact that no connecting portion 13 is provided between the first permanent magnet slots 11 corresponding to the second through hole can reduce the opening area of ​​the first rotor punching 10 and improve the structural strength of the first rotor punching 10. Therefore, through the above-mentioned arrangement, the first rotor punching 10 can improve the heat dissipation effect on the permanent magnet 3 while ensuring its own structural strength.

[0072] According to some embodiments of the present invention, Figure 1-Figure 6 As shown, the second flow hole 22 is constructed as one, and at least part of the axial projections of the plurality of first flow holes 12 are located in the second flow hole 22. It can be understood that the axial projections of the plurality of first flow holes 12 partially overlap with the axial projections of the second flow holes 22, respectively, so that the air outside the rotor lamination assembly 1 can enter the first flow holes 12 through the second flow holes 22, thereby ensuring the heat dissipation effect on the permanent magnets 3.

[0073] According to some embodiments of the present invention, Figure 1-Figure 6 As shown, the radius of the second flow hole 22 is r1, and the distance from the outer edge of the first flow hole 12 to the center of the first rotor punching 10 is r2, satisfying: r1≥r2. It can be understood that, through the above arrangement, in the axial projection, multiple first flow holes 12 are respectively located in the second flow holes 22, thereby avoiding the second rotor punching 20 partially blocking the first flow holes 12, improving the efficiency of the rotor stack assembly 1 entering the first flow holes 12, thereby improving the efficiency of air entering the first permanent magnet slot 11, and further improving the heat dissipation effect on the permanent magnet 3.

[0074] According to some embodiments of the present invention, Figure 1-Figure 6 As shown, there are multiple second flow holes 22 , which correspond to the first flow holes 12 one by one, respectively, and in the axial projection, at least part of the first flow holes 12 overlaps with the second flow holes 22 .

[0075] In some embodiments, the axial projections of the plurality of first flow holes 12 may partially overlap with the axial projections of the plurality of second flow holes 22; the axial projections of the plurality of first flow holes 12 may be located in the plurality of second flow holes 22; the axial projections of the plurality of second flow holes 22 may be located in the plurality of first flow holes 12; or the axial projections of the plurality of first flow holes 12 may completely overlap with the axial projections of the plurality of second flow holes 22, which is not limited here.

[0076] According to some embodiments of the utility model, a plurality of conducting parts are further provided on the second rotor punching 20, and at least one second permanent magnet slot 21 is connected to the corresponding second flow hole 22 through the conducting part. It can be understood that the air outside the rotor lamination assembly 1 can enter the second flow hole 22, and the air in the second flow hole 22 can enter the corresponding second permanent magnet slot 21 through the corresponding conducting part, thereby dissipating the heat of the permanent magnet 3, further improving the heat dissipation effect of the permanent magnet 3, and improving the energy efficiency of the motor 100.

[0077] According to some embodiments of the present invention, Figure 1 As shown, a plurality of first permanent magnet slots 11 are spaced apart in the circumferential direction, and each first permanent magnet slot 11 protrudes toward the center of the first rotor punching sheet 10. It can be understood that a permanent magnet 3 is respectively disposed in each of the plurality of first permanent magnet slots 11, so that the plurality of first permanent magnet slots 11 are prevented from being connected, thereby preventing the plurality of permanent magnets 3 from shaking in the plurality of connected first permanent magnet slots 11, and improving the installation stability of the permanent magnet 3.

[0078] It is worth noting that each first permanent magnet slot 11 protrudes toward the center of the first rotor punching sheet 10, and the protruding position can be connected to the connecting portion 13. Therefore, when the air in the first flow hole 12 enters the first permanent magnet slot 11 through the connecting portion 13, since the air enters from the protruding position, when the air flows in the first permanent magnet slot 11, the first permanent magnet slot 11 can guide the air, so that the air can quickly flow through the entire first permanent magnet slot 11, thereby improving the heat dissipation rate of the permanent magnet 3.

[0079] According to some embodiments of the present invention, Figure 1 As shown, the first permanent magnet slot 11 includes: a first slot segment 111 and a second slot segment 112, the first slot segment 111 and the second slot segment 112 are sequentially distributed and connected in the circumferential direction, and the distance from the first slot segment 111 to the center of the first rotor punching sheet 10 gradually decreases in the direction of the first slot segment 111 approaching the second slot segment 112; the distance from the second slot segment 112 to the center of the first rotor punching sheet 10 gradually decreases in the direction of the second slot segment 112 approaching the first slot segment 111; wherein the connection point between the first slot segment 111 and the second slot segment 112 is connected to the corresponding first flow hole 12 through the connecting portion 13.

[0080] It can be understood that, through the above-mentioned arrangement, the first slot segment 111 forms a streamlined structure in the direction from the connecting point to the free end, which facilitates the air to quickly flow through the first slot segment 111 after entering from the connecting point, and the second slot segment 112 forms a streamlined structure in the direction from the connecting point to the free end, which facilitates the air to quickly flow through the second slot segment 112 after entering from the connecting point. That is, through the above-mentioned arrangement, the rate at which air flows through the first permanent magnet slot 11 can be increased, thereby improving the heat dissipation effect on the permanent magnet 3.

[0081] In some embodiments, the first permanent magnet groove 11 may be configured as an arc structure, a "V" - shaped structure, a "匚" - shaped structure or other structures, etc., which is not limited herein.

[0082] According to some embodiments of the present utility model, as Figure 1 shown, a plurality of first rivet holes 14 are provided on the first rotor punching sheet 10, and at least two adjacent first permanent magnet grooves 11 are provided with first rivet holes 14. It can be understood that the first rivet holes 14 are adapted to receive rivets, and the rivets are adapted to pass through the first rivet holes 14 of a plurality of first rotor punching sheets 10 to fix the plurality of first rotor punching sheets 10, improving the structural stability of the rotor lamination assembly 1.

[0083] The first rivet holes 14 are provided between at least two adjacent first permanent magnet grooves 11. It can be that an opening position is defined between adjacent first permanent magnet grooves 11, and at least one opening position between adjacent opening positions is provided with a rivet hole. Thus, the opening symmetry of the first rotor punching sheet 10 can be improved, so as to ensure that the mass distribution of the first rotor punching sheet 10 in the circumferential direction is more uniform, and further improve the rotational stability of the rotor lamination assembly 1.

[0084] According to some embodiments of the present utility model, as Fig.11 shown, the total length dimension of a plurality of first rotor punching sheets 10 in the axial direction is h1, and the length dimension of the rotor lamination assembly 1 in the axial direction is h2, satisfying: 0.35 ≤ h1 / h2 ≤ 0.95.

[0085] It can be understood that a plurality of first rotor punching sheets 10 and a plurality of second rotor punching sheets 20 are stacked in the axial direction to jointly form the rotor lamination assembly 1. The total length dimension of a plurality of first rotor punching sheets 10 in the axial direction is h1, and the length dimension of the rotor lamination assembly 1 in the axial direction is h2.

[0086] When h1 / h2 < 0.35, the strength of the rotor lamination assembly 1 is not significantly improved, but the cooling effect on the permanent magnet 3 drops sharply; when h1 / h2 > 0.95, the cooling effect of the permanent magnet 3 is not significantly improved, but the structural strength of the rotor lamination drops sharply.

[0087] Therefore, 0.35 ≤ h1 / h2 ≤ 0.95 enables the rotor lamination assembly 1 to ensure good structural strength while cooling the permanent magnet 3 well.

[0088] According to some embodiments of the present utility model, as Figure 1-Figure 6As shown, the thickness of the plurality of first rotor punchings 10 is the same. At this time, the thickness dimension of the first rotor punching 10 is L1, h1=n*L1. The same thickness of the plurality of first rotor punchings 10 reduces the mold opening cost of the first rotor punchings 10, thereby reducing the production and R&D costs of the first rotor punchings 10, thereby reducing the production cost of the motor 100.

[0089] According to some embodiments of the present invention, Figure 1-Figure 6 As shown, at least one first rotor punching sheet 10 is stacked in the axial direction to form a first punching sheet group. The first punching sheet group is constructed in multiple pieces and the thicknesses are L1, L2, L3, ..., Ln, respectively, satisfying: h1 = L1 + L2 + L3 + ... + Ln. It can be understood that there are multiple first punching sheet groups, and the thicknesses of the multiple first punching sheet groups can be the same or different.

[0090] In some embodiments, although the structures of the multiple first rotor punchings 10 are the same, the thicknesses of the multiple first rotor punchings 10 may be different. Since the thickness of the first rotor punchings 10 determines its structural strength, the structural strengths of the multiple first rotor punchings 10 with different thicknesses are different. The structural strength of the multiple first rotor punchings 10 with different thicknesses after being stacked in the axial direction can be improved. Therefore, the structural strength of the rotor lamination assembly 1 can be improved through the above-mentioned arrangement.

[0091] According to some embodiments of the present invention, Figure 1-Figure 6 As shown, in the axial direction, the first rotor punching sheet 10 and the second rotor punching sheet 20 are alternately arranged. Therefore, through the above arrangement, the structural strength of the rotor lamination assembly 1 in the axial direction can be made more uniform, thereby avoiding the phenomenon that the structural strength of the rotor lamination assembly 1 in the axial direction fluctuates, thereby avoiding deformation of the rotor lamination assembly 1 in places with low structural strength, and improving the overall structural strength of the rotor lamination assembly 1.

[0092] The rotor according to the present invention is briefly described below.

[0093] According to the utility model, the rotor is provided with the rotor lamination assembly 1 of the above-mentioned embodiment. Since the rotor according to the utility model is provided with the rotor lamination assembly 1 described in any one of the above-mentioned embodiments, the rotor has a better heat dissipation effect on the permanent magnet 3, thereby improving the magnetic properties of the permanent magnet 3 when the rotor rotates.

[0094] In some embodiments, the rotor includes a rotor lamination assembly 1 and a permanent magnet 3, a plurality of first rotor punchings 10 are stacked in the axial direction to jointly construct a rotor, the first permanent magnet slots 11 of the plurality of first rotor punchings 10 jointly construct an installation channel, the permanent magnet 3 is accommodated in the installation channel, and the air in the first flow hole 12 of each first rotor punching 10 can enter the installation channel through the corresponding connecting portion 13 respectively, thereby achieving heat dissipation of the permanent magnet 3.

[0095] According to some embodiments of the present invention, Figure 8 As shown, the rotor also includes: an end plate 30, which is arranged at at least one end of the rotor stack assembly 1 in the axial direction, and is provided with a through hole 31 penetrating in the thickness direction. In the axial projection, at least part of the through hole 31 overlaps with the first flow hole 12.

[0096] In some embodiments, the rotor lamination assembly 1 is provided with end plates 30 at both ends in the axial direction, and the two end plates 30 jointly limit the rotor lamination assembly 1, thereby improving the structural stability of the rotor. The end plates 30 are provided with through holes 31 penetrating in the thickness direction, and in the axial projection, the projection of the first flow hole 12 is located in the through hole 31, thereby preventing the end plates 30 from blocking the air outside the rotor from entering the first flow hole 12, and at the same time, the efficiency of the air outside the rotor entering the first flow hole 12 can reach the maximum value, thereby improving the efficiency of the air entering the first permanent magnet slot 11, and further improving the heat dissipation effect of the permanent magnet 3.

[0097] Of course, the axial projection of the through hole 31 may partially overlap with the axial projection of the first flow hole 12; or the axial projection of the through hole 31 may be located within the first flow hole 12; or the axial projection of the through hole 31 may completely overlap with the axial projection of the first flow hole 12, which is not limited here.

[0098] It is worth noting that a through hole 32 is also provided on the end plate 30, and the projection of the through hole 32 in the axial direction is located in the first permanent magnet slot 11. When the compressor 1000 is working, the motor 100 works accordingly. The compressor 1000 includes a pump body 200, and the pump body 200 is connected to the output end of the motor 100, that is, the motor 100 can drive the pump body 200 to rotate when working. The pump body 200 is suitable for injecting oil-containing gas, and the oil-containing gas can enter the first flow hole 12. When the motor 100 is working, the rotor can be rotated, and the first flow hole 12 rotates with the rotor. Under the action of centrifugal force, the oil-containing gas enters the first flow hole 12 through the connecting portion 13. The permanent magnet slots 11 dissipate heat for the permanent magnets 3, and the oil-containing gas becomes high-temperature oil-containing gas after dissipating heat for the permanent magnets 3. The high-temperature oil-containing gas is discharged through the first permanent magnet slots 11 at the two ends of the rotor. Since the axial projection of the through hole 32 is located in the first permanent magnet slots 11, the high-temperature oil-containing gas will hit the end plate 30 when discharged. The gas has a small density and will be discharged from the rotor through the through hole 32 and finally discharged from the compressor 1000. The oil adheres to the end plate 30 and drips under the action of gravity, thereby realizing oil and gas separation, reducing the oil content of the gas discharged from the compressor 1000, and thus improving the oil discharge rate of the compressor 1000.

[0099] In some embodiments, the rotor further includes: a balancing block 40, which is disposed on a side of the end plate 30 axially away from the rotor lamination assembly 1, and the balancing block 40 is suitable for balancing the uniformity of mass distribution of the rotor in the circumferential direction, thereby improving the rotational stability of the rotor.

[0100] The motor 100 according to the present invention is briefly described below.

[0101] The motor 100 according to the utility model is provided with the rotor of the above embodiment. Since the motor 100 according to the utility model is provided with the rotor described in any one of the above embodiments, the permanent magnet 3 of the motor 100 has good heat dissipation effect, thereby improving the energy efficiency of the motor 100.

[0102] The motor 100 further includes: a stator 2 , which is disposed around the outer circumference of the rotor. The stator 2 includes an iron core and a winding. The winding is wound around the iron core and disposed on the outer circumference of the rotor through the iron core. The rotor can rotate relative to the stator 2 .

[0103] The compressor 1000 according to the present invention is briefly described below.

[0104] The compressor 1000 according to the utility model is provided with the motor 100 of the above-mentioned embodiment. Since the compressor 1000 according to the utility model is provided with the motor 100 described in any one of the above-mentioned embodiments, the motor 100 of the compressor 1000 has good energy efficiency, so that the energy efficiency of the compressor 1000 is good, and the oil discharge rate of the compressor 1000 can also be improved, thereby improving the reliability of the compressor 1000.

[0105] The air conditioner 10000 according to the present invention is briefly described below.

[0106] The air conditioner 10000 according to the utility model is provided with the compressor 1000 of the above-mentioned embodiment. Since the air conditioner 10000 according to the utility model is provided with the compressor 1000 described in any one of the above-mentioned embodiments, the compressor 1000 of the air conditioner 10000 has high reliability, so that the air conditioner 10000 has a good effect.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0108] Although embodiments of the present invention have been shown and described above, changes, modifications, substitutions and variations may be made to the embodiments described above.

Claims

1. A rotor lamination assembly, characterized in that: include: a first rotor punching sheet, wherein a plurality of first permanent magnet slots suitable for accommodating permanent magnets, a plurality of first flow holes and a plurality of connecting parts are provided on the first rotor punching sheet, wherein the first flow holes, the connecting parts and the first permanent magnet slots are sequentially distributed away from the center of the first rotor punching sheet in the radial direction, and at least one of the first permanent magnet slots is connected to the corresponding first flow hole through the connecting part; The minimum width of the connecting portion is w1, and the minimum width of the permanent magnet installation area in the first permanent magnet slot is w2, satisfying: 0.1≤w1 / w2≤1.

2. The rotor lamination assembly according to claim 1, characterized in that: Also includes: The second rotor punching is provided with a plurality of second permanent magnet slots, the plurality of second permanent magnet slots correspond one-to-one to the plurality of first permanent magnet slots, and the second rotor punching is also provided with a second flow hole, and the projections of the first rotor punching and the second rotor punching do not completely overlap in the axial direction.

3. The rotor lamination assembly according to claim 2, characterized in that: In an axial projection, the second flow hole at least partially overlaps with the first flow hole.

4. The rotor lamination assembly according to any one of claims 2 to 3, characterized in that: The second flow hole is configured as one, and at least part of the projections of the plurality of first flow holes in the axial direction are located inside the second flow hole.

5. The rotor lamination assembly according to claim 4, characterized in that: The radius of the second flow hole is r1, and the distance from the outer edge of the first flow hole to the center of the first rotor punching is r2, satisfying: r1≥r2.

6. The rotor lamination assembly according to any one of claims 2 to 3, characterized in that: There are a plurality of the second flow holes, and the plurality of the second flow holes correspond to the plurality of the first flow holes one by one, respectively. In the axial projection, at least a portion of the first flow holes overlaps with the second flow holes.

7. The rotor lamination assembly according to claim 6, characterized in that: The second rotor punching sheet is further provided with a plurality of conducting parts, and at least one of the second permanent magnet slots is connected to the corresponding second flow hole through the conducting part.

8. The rotor lamination assembly according to claim 1, characterized in that: A plurality of first rivet holes are arranged on the first rotor punching sheet, and at least one first rivet hole is arranged between two adjacent first permanent magnet slots.

9. The rotor lamination assembly according to claim 2, characterized in that: The total axial length of the plurality of first rotor punchings is h1, and the axial length of the rotor lamination assembly is h2, satisfying: 0.35≤h1 / h2≤0.

95.

10. The rotor lamination assembly according to claim 1, characterized in that: The thickness of the plurality of first rotor punching sheets is the same.

11. The rotor lamination assembly according to claim 10, characterized in that: At least one of the first rotor punching sheets is stacked in the axial direction to form a first punching sheet group. The first punching sheet group is constructed in plurality and has thicknesses of L1, L2, L3, . . . , Ln, respectively, satisfying: h1 = L1 + L2 + L3 + . . . + Ln.

12. The rotor lamination assembly according to claim 2, characterized in that: In the axial direction, the first rotor punching sheets and the second rotor punching sheets are arranged alternately.

13. A rotor, characterized in that: A rotor lamination assembly comprising any one of claims 1-12.

14. The rotor according to claim 13, characterized in that Also includes: An end plate is arranged at at least one end of the rotor lamination assembly in the axial direction, and a through hole penetrating in the thickness direction is arranged on the end plate. In the axial projection, at least a part of the through hole overlaps with the first flow hole.

15. A motor, characterized in that: A rotor comprising any one of claims 13-14.

16. A compressor, characterized in that: Includes the motor as claimed in claim 15.

17. An air conditioner, characterized in that: Comprising the compressor of claim 16.

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