Rotor core, rotor, motor, compressor and air conditioner

Abstract

The utility model discloses a rotor core, a rotor, a motor, a compressor and an air conditioner, and the rotor core 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 first communication parts, the first circulation holes, the first communication parts and the first permanent magnet grooves are sequentially distributed in the radial direction far away from the circle center of the first rotor punching sheet; and at least one first permanent magnet groove is communicated with one first circulation hole through the first communication part. According to the rotor iron core provided by the embodiment of the invention, the rotor iron core can cool the permanent magnets and improve the performance of the permanent magnets.

Description

Technical Field

[0001] The present application relates to the field of household electrical appliances, and in particular to a rotor core, a rotor, a motor, a compressor and an air conditioner. Background Art

[0002] In related technologies, with the national policy requirements for energy conservation and emission reduction and the release and implementation of the new first-level energy efficiency standards, high efficiency has become an urgent issue in the air-conditioning industry. As the power source of the air conditioner, the compressor 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 compressor, the motor continuously works in a high-temperature environment. The working environment and state of each component are greatly different from normal temperature. When the temperature of the permanent magnet rises, the residual magnetic properties will decrease. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a rotor core, which can cool down the permanent magnets and improve the performance of the permanent magnets.

[0004] The present application also provides a rotor having the above rotor core.

[0005] The present application also provides a motor having the above rotor.

[0006] The present application also provides a compressor having the above motor.

[0007] The present application also provides an air conditioner having the compressor.

[0008] According to an embodiment of the present application, the rotor core includes: a first rotor punching sheet, on which are provided a plurality of first permanent magnet slots suitable for accommodating permanent magnets, a plurality of first flow holes and a plurality of first connecting parts, the first flow holes, the first connecting parts and the first permanent magnet slots are distributed in sequence radially away from the center of the first rotor punching sheet; at least one of the first permanent magnet slots is connected to one of the first flow holes through the first connecting part.

[0009] According to the rotor core of the embodiment of the present application, the rotor core includes a first rotor punching sheet, on which are formed a plurality of first permanent magnet slots, a plurality of first flow holes and a plurality of first connecting parts, wherein at least one first permanent magnet slot is connected to one of the first flow holes through a first connecting part, thereby ensuring that the oil-gas mixture of the pump body can flow from the first connecting part to the first permanent magnet slot when flowing through the first connecting hole, thereby achieving the effect of cooling the permanent magnet in the first permanent magnet slot and improving the performance of the permanent magnet.

[0010] In some embodiments of the present application, at least one of the first permanent magnet slots is connected to the first flow hole adjacent to it in the radial direction of the first rotor punching sheet through the first connecting portion.

[0011] In some embodiments of the present application, the rotor core also includes: a second rotor punching sheet, on which a plurality of second permanent magnet slots suitable for accommodating the permanent magnets are arranged, the plurality of second permanent magnet slots are arranged one-to-one corresponding to the plurality of first permanent magnet slots, and the second rotor punching sheet is also provided with a rotor through hole; wherein the projection of the first flow hole in the axial direction is located inside the projection of the rotor through hole.

[0012] In some embodiments of the present application, the radius of the rotor through hole is R, and the maximum distance between the radial outer side wall of the first flow hole and the center of the first rotor punching sheet is L and satisfies: L≤R.

[0013] In some embodiments of the present application, the first rotor punching sheets and the second rotor punching sheets are alternately arranged in the axial direction.

[0014] In some embodiments of the present application, the first rotor punching sheet is constructed as a plurality and is axially overlapped to form a first rotor punching sheet group, the second rotor punching sheet is constructed as a plurality and is axially overlapped to form a second rotor punching sheet group, and the first rotor punching sheet group and the second rotor punching sheet group are alternately arranged in the axial direction.

[0015] In some embodiments of the present application, the rotor core also includes: a third rotor punching, wherein the third rotor punching is provided with a plurality of third permanent magnet slots, a plurality of second flow holes and a plurality of second connecting parts, the plurality of third permanent magnet slots are arranged one-to-one correspondingly to the plurality of first permanent magnet slots, and at least one of the third permanent magnet slots is connected to the second flow hole adjacent to it in the radial direction through the second connecting part; wherein the projections of the first rotor punching and the third rotor punching do not completely overlap in the axial direction.

[0016] In some embodiments of the present application, in the axial direction, the second connecting portion does not overlap with at least a portion of the first connecting portion.

[0017] In some embodiments of the present application, the first rotor punching sheets and the third rotor punching sheets are alternately arranged in the axial direction.

[0018] In some embodiments of the present application, the first rotor punching sheet is constructed as a plurality and is axially overlapped to form a first rotor punching sheet group, the third rotor punching sheet is constructed as a plurality and is axially overlapped to form a third rotor punching sheet group, and the first rotor punching sheet group and the third rotor punching sheet group are alternately arranged in the axial direction.

[0019] In some embodiments of the present application, the rotor core also includes: a fourth rotor punching sheet, the fourth rotor punching sheet is provided with a plurality of fourth permanent magnet slots and a plurality of third flow holes, the plurality of fourth permanent magnet slots are arranged in one-to-one correspondence with the plurality of first permanent magnet slots, and the plurality of third flow holes are arranged in one-to-one correspondence with the plurality of first flow holes; wherein a reinforcement area is formed between the plurality of fourth permanent magnet slots and the plurality of third flow holes, and in the axial direction, the first connecting portion is arranged opposite to the reinforcement area.

[0020] In some embodiments of the present application, the fourth rotor punchings and the first rotor punchings are alternately arranged in the axial direction.

[0021] In some embodiments of the present application, 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.

[0022] The rotor according to an embodiment of the present application is briefly described below.

[0023] The rotor according to the embodiment of the present application is provided with the rotor core of the above embodiment. Since the rotor of the embodiment of the present application is provided with the rotor core of the above embodiment, the rotor core can ensure that the oil-gas mixture of the pump body can flow from the first connecting part to the first permanent magnet slot when flowing through the first connecting hole, thereby realizing cooling of the permanent magnet in the first permanent magnet slot and improving the performance of the permanent magnet. A rotor, characterized in that it includes the rotor core as described in any one of claims 1 to 15.

[0024] In some embodiments of the present application, the rotor further includes: an end plate, wherein the 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 provided on the end plate, and in the axial projection, at least a portion of the through hole overlaps with the first flow hole.

[0025] In some embodiments of the present application, a ventilation hole extending through the end plate in the axial direction is further formed, and the ventilation hole is arranged opposite to the first permanent magnet slot.

[0026] The following is a brief description of the motor according to an embodiment of the present application.

[0027] The motor according to the embodiment of the present application is provided with the rotor of the above-mentioned embodiment. Since the motor according to the embodiment of the present application is provided with the rotor of the above-mentioned embodiment, the pump body part in the motor can produce an oil-gas mixture, and the oil-gas mixture can reduce the temperature of the permanent magnet, improve the performance of the permanent magnet, and improve the energy efficiency of the compressor. After the oil-gas mixture hits the permanent magnet slot or the upper end plate, the oil flows back to the bottom end and the gas flows upward through the air vent, thereby realizing oil and gas separation, improving the oil discharge rate of the compressor, and improving the reliability of the compressor.

[0028] The following is a brief description of the compressor according to an embodiment of the present application.

[0029] According to the compressor of the embodiment of the present application, there is provided the motor of the above-mentioned embodiment. Since the compressor of the embodiment of the present application is provided the motor of the above-mentioned embodiment, the compressor can generate an oil-gas mixture when working. The oil-gas mixture can reduce the temperature of the permanent magnet, improve the performance of the permanent magnet, and improve the energy efficiency of the compressor. After the oil-gas mixture hits the permanent magnet slot or the upper end plate, the oil flows back to the bottom and the gas flows upward through the air vent, thereby realizing oil-gas separation, improving the oil discharge rate of the compressor, and improving the reliability of the compressor.

[0030] The following is a brief description of the air conditioner according to the embodiment of the present application.

[0031] The air conditioner according to the embodiment of the present application includes the compressor described in any of the above embodiments. Since the air conditioner according to the embodiment of the present application includes the compressor described in any of the above embodiments, the compressor of the air conditioner can produce an oil-gas mixture when working. The oil-gas mixture can reduce the temperature of the permanent magnet, improve the performance of the permanent magnet, and improve the energy efficiency of the compressor. After the oil-gas mixture hits the permanent magnet groove or the upper end plate, the oil flows back to the bottom and the gas flows upward through the air vent, thereby realizing oil and gas separation, improving the oil discharge rate of the compressor, and improving the reliability of the compressor.

[0032] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 is a schematic structural diagram of a first rotor punching sheet according to an embodiment of the present application;

[0035] Figure 2 is a schematic structural diagram of a first rotor punching sheet according to another embodiment of the present application;

[0036] Figure 3 is a schematic structural diagram of a second rotor punching sheet according to an embodiment of the present application;

[0037] Figure 4 is a schematic structural diagram of a rotor core formed by stacking a first rotor punching sheet and a second rotor punching sheet according to an embodiment of the present application;

[0038] Figure 5 is a schematic structural diagram of a third rotor punching sheet according to an embodiment of the present application;

[0039] Figure 6 is a schematic structural diagram of a fourth rotor punching sheet according to an embodiment of the present application;

[0040] Figure 7 is a schematic structural diagram of a rotor core formed by stacking a first rotor punching sheet and a third rotor punching sheet according to an embodiment of the present application;

[0041] Figure 8 is a schematic structural diagram of a rotor core formed by alternating first rotor punchings and third rotor punchings according to an embodiment of the present application;

[0042] Fig. 9 is a schematic structural diagram of a rotor according to an embodiment of the present application;

[0043] Fig.10 yes Fig. 9 Schematic diagram of the cross section of the middle rotor;

[0044] Fig.11 is a cross-sectional schematic diagram of a motor according to an embodiment of the present application;

[0045] Fig.12 is a structural schematic diagram of a compressor according to an embodiment of the present application;

[0046] Fig.13 is a structural schematic diagram of an air conditioner according to an embodiment of the present application;

[0047] Fig.14 is a temperature curve diagram of a permanent magnet according to an embodiment of the present application and a permanent magnet in the prior art;

[0048] Fig.15 is a COP comparison diagram of a compressor according to an embodiment of the present application and a compressor in the prior art;

[0049] Fig.16 It is a schematic diagram of the oil discharge rate of the compressor according to the embodiment of the present application and the compressor in the prior art.

[0050] Reference numerals:

[0051] 10. Rotor core;

[0052] 11, first rotor punching sheet; 111, first permanent magnet slot; 1111, first slot section; 1112, second slot section;

[0053] 112. a first flow hole;

[0054] 113. first connecting portion; 114. first rivet hole;

[0055] 12. Second rotor punching sheet; 121. Second permanent magnet slot; 122. Rotor through hole;

[0056] 13. third rotor punching sheet; 131. third permanent magnet slot; 132. second flow hole; 133. second connecting portion;

[0057] 14. fourth rotor punching sheet; 141. fourth permanent magnet slot; 142. third flow hole; 143. reinforcement area;

[0058] 20. Rotor;

[0059] 21. Permanent magnet; 22. End plate; 221. Through hole; 222. Ventilation hole; 23. Balance block; 24. Rivet; 25. Through hole;

[0060] 30. Motor; 31. Stator; 311. Stator core; 312. Stator winding;

[0061] 40. compressor; 41. pump body; 42. casing; 43. base; 50. air conditioner. DETAILED DESCRIPTION

[0062] The embodiments of the present application 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 application, and cannot be understood as limiting the present application.

[0063] Reference below Figure 1-Figure 16 A rotor core 10 according to an embodiment of the present application is described, wherein the rotor core 10 includes a first rotor punching 11, on which a plurality of first permanent magnet slots 111 suitable for accommodating permanent magnets 21, a plurality of first flow holes 112 and a plurality of first connecting portions 113 are provided, wherein the first flow holes 112, the first connecting portions 113 and the first permanent magnet slots 111 are distributed in sequence radially away from the center of the first rotor punching 11, wherein at least one first permanent magnet slot 111 is connected to one of the first flow holes 112 via the first connecting portion 113.

[0064] At present, with the national policy requirements for energy conservation and emission reduction and the release and implementation of the new first-level energy efficiency standards, high efficiency has become an urgent issue in the air-conditioning industry. As the power source of the air conditioner, the compressor 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 of the industry in recent years. In the compressor, the motor continuously works in a high-temperature environment. The working environment and state of each component are greatly different from normal temperature. When the temperature of the permanent magnet rises, the residual magnetic properties will decrease.

[0065] like Figure 1As shown, specifically, a plurality of first permanent magnet slots 111 are formed on the first rotor punching 11, and the first permanent magnet slots 111 can be used to install the permanent magnet 21, and the plurality of first permanent magnet slots 111 can be arranged at intervals in the circumferential direction of the first rotor punching 11, and the number of the first permanent magnet slots 111 can be set according to the actual needs of the product, that is, the required number of the permanent magnet 21, and in a specific embodiment, the number of the first permanent magnet slots 111 can be 8. The first permanent magnet slot 111 can be arranged to penetrate the axial direction of the first rotor punching 11, and the first permanent magnet slots 111 of the plurality of first rotor punchings 11 can be arranged correspondingly in the axial direction.

[0066] A plurality of first connecting holes are also formed on the first rotor punching 11, and the plurality of first connecting holes can be respectively connected to the pump body 41 of the compressor 40. When the oil-gas mixture generated by the pump body 41 can flow through the first connecting holes, a first connecting portion 113 is also formed on the first rotor punching 11. The first flow hole 112, the first connecting portion 113 and the first permanent magnet slot 111 can be distributed sequentially in the radial direction toward the direction away from the center of the circle of the first rotor punching 11 to ensure that the first connecting hole can be located close to the center of the circle, the first permanent magnet slot 111 can be located away from the center of the circle, and the first connecting portion 113 can be located between the first connecting hole and the first permanent magnet slot 111.

[0067] Furthermore, at least one first permanent magnet slot 111 is connected to one of the first connecting holes through the first connecting portion 113. It can be understood that when the oil-gas mixture of the pump body 41 flows through the first connecting hole, it can flow from the first connecting portion 113 to the first permanent magnet slot 111, thereby achieving cooling of the permanent magnet 21 in the first permanent magnet slot 111. During actual assembly, the permanent magnet 21 is installed in the first permanent magnet slot 111 at a certain distance from the inner wall of the first permanent magnet slot 111, thereby ensuring that the oil-gas mixture can flow into the first permanent magnet slot 111 through the first connecting portion 113 and cool the permanent magnet 21.

[0068] like Figure 1 As shown, in some embodiments, the number of first permanent magnet slots 111 can be 8, and 4 first permanent magnet slots 111 can be connected to 4 first connecting holes through 4 first connecting parts 113, or all 8 first permanent magnet slots 111 can be connected to 8 first connecting holes through 8 first connecting parts 113, wherein the number of connections between the first permanent magnet slots 111 and the first connecting holes can be determined as needed and is not limited here. By flowing the oil-gas mixture into the first permanent magnet slots 111, the permanent magnet 21 can be cooled, thereby ensuring the residual magnetic properties of the permanent magnet 21.

[0069] In short, the rotor core 10 of the present application includes a first rotor punching 11, on which are formed a plurality of first permanent magnet slots 111, a plurality of first flow holes 112 and a plurality of first connecting portions 113, wherein at least one first permanent magnet slot 111 is connected to one of the first flow holes 112 via a first connecting portion 113, thereby ensuring that the oil-gas mixture of the pump body 41 can flow from the first connecting portion 113 to the first permanent magnet slot 111 when flowing through the first connecting hole, thereby achieving cooling of the permanent magnet 21 in the first permanent magnet slot 111 and improving the performance of the permanent magnet 21.

[0070] like Figure 1 and Figure 2 As shown, in some embodiments of the present application, at least one first permanent magnet slot 111 is connected to a first flow hole 112 radially adjacent to it in the first rotor punching 11 through a first connecting portion 113. The above arrangement can enable the first connecting holes, the first connecting portion 113 and the first permanent magnet slot 111, which are sequentially distributed in the direction radially away from the center of the first rotor punching 11, to be sequentially connected. While reducing the size of the first connecting portion 113, it can also be ensured that the first connecting portion 113 can effectively connect the first connecting hole and the first permanent magnet slot 111 adjacent to it, thereby effectively improving the strength of the first rotor punching 11.

[0071] In some embodiments of the present application, the minimum width of the first connecting portion 113 is w1, and the minimum width of the first permanent magnet slot 111 is w2, satisfying: 0.1≤w1 / w2≤1, so that the first rotor punching sheet 11 can enhance the circulation efficiency of air entering the first permanent magnet slot 111 while ensuring the structural strength, thereby enhancing the heat dissipation effect of the first permanent magnet slot 111.

[0072] 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 111 through the circulation portion is low, resulting in a low heat dissipation capacity of the permanent magnet 21. It is worth noting that when w1 / w2 is less than 0.1, the structural strength of the first rotor punching sheet 11 is not significantly improved, but the heat dissipation effect on the permanent magnet 21 is sharply reduced; when w1 / w2 is greater than 1, the heat dissipation effect of the permanent magnet 21 is not significantly improved, but the structural strength of the first rotor punching sheet 11 is sharply reduced.

[0073] like Figure 3As shown, in some embodiments of the present application, the rotor core 10 further includes a second rotor punching sheet 12, and a plurality of second permanent magnet slots 121 may be provided on the second rotor punching sheet 12, and the second permanent magnet slots 121 may be used to accommodate the permanent magnets 21, and the plurality of second permanent magnet slots 121 may be arranged one by one with the plurality of first permanent magnet slots 111 in the axial direction, and a rotor through hole 122 is further provided on the second rotor punching sheet 12, and further, in the axial direction, the projection of the first flow hole 112 is located inside the projection of the rotor through hole 122 It can be understood that when the first rotor punching sheet 11 and the second rotor punching sheet 12 are arranged sequentially in the axial direction, the oil-gas mixture generated by the pump body 41 can flow into the first flow hole 112 through the rotor through hole 122, and then punch the first flow hole 112 through the first connecting portion to flow into the first permanent magnet slot 111. Since the first permanent magnet slot 111 and the second permanent magnet slot 121 are arranged correspondingly in the axial direction, the oil-gas mixture can cool down the permanent magnets 21 in the first permanent magnet slot 111 and the second permanent magnet slot 121.

[0074] like Figure 3 As shown, in some embodiments of the present application, the radius of the rotor through hole 122 is R, and the maximum distance between the radial outer wall of the first flow hole 112 and the center of the first rotor punching 11 is L. It can be understood that the radial outer wall of the first flow hole 112 can be a peripheral wall on the side away from the center of the circle in the radial direction. The maximum distance between the first flow hole 112 and the center of the first rotor punching 11 can also be the outer contour radius of multiple first flow holes 112. The radius R of the rotor through hole 122 and the maximum distance L between the first flow hole 112 and the center of the first rotor punching 11 satisfy the following relationship: L≤R. By setting the radius of the rotor through hole 122 and the maximum distance between the first flow hole 112 and the center of the first rotor punching 11 within the above range, it can be ensured that the flow path of the first flow hole 112 of the first rotor punching 11 is unobstructed.

[0075] like Figure 4 As shown, in some embodiments of the present application, the first rotor punching sheet 11 and the second rotor punching sheet 12 may be alternately arranged in a single-piece alternating manner or in a multiple-piece combination and then alternately arranged. Specifically, the first rotor punching sheet 11 and the second rotor punching sheet 12 may be alternately arranged in the axial direction to form the rotor core 10. In other embodiments, the first rotor punching sheet 11 may be configured as a plurality of sheets, and the plurality of first rotor punching sheets 11 may be overlapped in the axial direction to form a first rotor punching group. The second rotor punching sheet 12 may be configured as a plurality of sheets, and the plurality of second rotor punching sheets 12 may be overlapped in the axial direction to form a second rotor punching group. The first rotor punching group and the second rotor punching group may be alternately arranged in the axial direction to form the rotor core 10.

[0076] like Figure 5As shown, in some embodiments of the present application, the rotor core 10 also includes a third rotor punching 13, and a plurality of third permanent magnet slots 131 may be provided on the third rotor punching 13. The third permanent magnet slots 131 may be used to accommodate the permanent magnets 21, and the plurality of third permanent magnet slots 131 may be arranged one-to-one with the plurality of first permanent magnet slots 111. A plurality of second flow holes 132 and a plurality of second connecting portions 133 are also formed on the third rotor punching 13. At least one third permanent magnet slot 131 is connected to its radially adjacent second flow hole 132 through the second connecting portion 133. It can be understood that when the oil-gas mixture of the pump body 41 flows through the second flow hole 132, it can flow from the second connecting portion 133 to the third permanent magnet slot 131, thereby achieving cooling of the permanent magnet 21 in the third permanent magnet slot 131.

[0077] Further, in the axial direction, the projections of the first rotor punching 11 and the third rotor punching 13 do not completely overlap. It should be noted that, in the axial direction, the projection of the first permanent magnet slot 111 on the first rotor punching 11 and the projection of the third permanent magnet slot 131 on the third rotor punching 13 can overlap, the projections of the first connecting hole on the first rotor punching 11 and the second flow hole 132 on the third rotor punching 13 can overlap, and the projections of the first connecting portion 113 on the first rotor punching 11 and the second connecting portion 133 on the third rotor punching 13 can partially overlap or not overlap, that is, ...1 on the first rotor punching 1 The first connecting portion 113 and the second connecting portion 133 may be connected or not connected. Since the first connecting hole and the second connecting hole are connected, the oil-gas mixture of the pump body 41 can flow to the first connecting portion 113 and the second connecting portion 133 through the first connecting hole and the second connecting hole, respectively. Therefore, the non-connection between the first connecting portion 113 and the second connecting portion 133 will not affect the normal cooling process of the permanent magnet 21, and by appropriately reducing the number of the first connecting portion 113 and the second connecting portion 133, the strength of the rotor core 10 can be improved while ensuring the cooling efficiency of the permanent magnet 21. Among them, the projection in the axial direction can be understood as the projection on the vertical plane of the axial direction.

[0078] like Figure 1 and Figure 5 As shown, in some embodiments of the present application, in the axial direction, the second connecting portion 133 does not overlap with at least part of the first connecting portion 113. It can be understood that when the sum of the number of the first connecting portions 113 and the number of the second connecting portions 133 is greater than 8, the first connecting portion 113 and the second connecting portion 133 are partially connected. When the sum of the number of the first connecting portions 113 and the number of the second connecting portions 133 is less than or equal to 8, the first connecting portion 113 and the second connecting portion 133 may not be connected, and the first rotor punching 11 is connected to the third rotor punching 13 through the first flow hole 112 and the second flow hole 132.

[0079] In a specific embodiment, eight mounting positions are formed on the first rotor punching 11 and the third rotor punching 13, and the mounting positions can be used to form the first connecting portion 113 or the second connecting portion 133. The first connecting portion 113 on the first rotor punching 11 can be located at four of the eight mounting positions, and the second connecting portion 133 on the third rotor punching 13 can be located at the other four of the eight mounting positions. At this time, in the axial direction, the first connecting portion 113 and the second connecting portion 133 do not overlap. The above arrangement can improve the cooling efficiency of the permanent magnet 21 while improving the strength of the rotor core 10.

[0080] like Figure 7 and Figure 8 As shown, in some embodiments of the present application, the alternating arrangement of the first rotor punching sheet 11 and the third rotor punching sheet 13 can be a single-piece alternating arrangement or a multiple-piece combination and then alternating arrangement. Specifically, the first rotor punching sheet 11 and the third rotor punching sheet 13 can be alternately arranged in the axial direction to form the rotor core 10. In other embodiments, the first rotor punching sheet 11 is constructed in plurality, and the plurality of first rotor punching sheets 11 can be overlapped in the axial direction to form a first rotor punching group. The third rotor punching sheet 13 can be constructed in plurality, and the plurality of third rotor punching sheets 13 can be overlapped in the axial direction to form a third rotor punching group. The first rotor punching group and the third rotor punching group can be alternately arranged in the axial direction to form the rotor core 10.

[0081] like Figure 6 As shown, in some embodiments of the present application, the rotor core 10 also includes a fourth rotor punching 14, and a plurality of fourth permanent magnet slots 141 may be provided on the fourth rotor punching 14, the fourth permanent magnet slots 141 may be used to accommodate the permanent magnets 21, and the plurality of fourth permanent magnet slots 141 are arranged one-to-one with the plurality of first permanent magnet slots 111, and a plurality of third flow holes 142 are also formed on the fourth rotor punching 14, and the plurality of third flow holes 142 are arranged one-to-one with the plurality of first flow holes 112. It should be noted that the fourth permanent magnet slots 141 and the third flow holes 142 on the fourth rotor punching 14 are not connected, wherein a reinforcement area 143 may be formed between the plurality of fourth permanent magnet slots 141 and the plurality of third flow holes 142, the reinforcement area 143 may be in a circular shape, and the structural strength of the fourth rotor punching 14 may be improved by providing the reinforcement area 143.

[0082] Furthermore, in the axial direction, the first connecting portion 113 is arranged opposite to the reinforcement area 143, and the first rotor punching sheet 11 and the fourth rotor punching sheet 14 can be combined to form the rotor core 10. In a specific embodiment, the number of the first permanent magnet slots 111 can be 8, and the number of the first connecting holes can also be 8. The 8 first permanent magnet slots 111 are connected to the 8 first connecting holes through the 8 first connecting portions 113 respectively. When the first rotor punching sheet 11 and the fourth rotor punching sheet 14 are arranged in the axial direction, the 8 first connecting portions 113 are arranged opposite to the reinforcement area 143 respectively. The above arrangement can ensure the cooling efficiency of the permanent magnet 21 while improving the strength of the rotor core 10.

[0083] In some embodiments of the present application, the alternating arrangement of the first rotor punching sheet 11 and the fourth rotor punching sheet 14 can be a single-piece alternating arrangement or a multiple-piece combination and then alternating arrangement. Specifically, the first rotor punching sheet 11 and the fourth rotor punching sheet 14 can be alternately arranged in the axial direction to form the rotor core 10. In other embodiments, the first rotor punching sheet 11 is constructed in plurality, and the plurality of first rotor punching sheets 11 can be overlapped in the axial direction to form a first rotor punching group. The fourth rotor punching sheet 14 can be constructed in plurality, and the plurality of fourth rotor punching sheets 14 can be overlapped in the axial direction to form a fourth rotor punching group. The first rotor punching group and the fourth rotor punching group can be alternately arranged in the axial direction to form the rotor core 10.

[0084] like Figure 1 As shown, in some embodiments of the present application, a plurality of first permanent magnet slots 111 are spaced apart in the circumferential direction, and each first permanent magnet slot 111 protrudes toward the center of the first rotor punching sheet 11. It can be understood that a permanent magnet 21 is respectively disposed in the plurality of first permanent magnet slots 111 to prevent the plurality of permanent magnets 21 from shaking in the plurality of connected first permanent magnet slots 111, thereby improving the installation stability of the permanent magnet 21.

[0085] It is worth noting that each first permanent magnet slot 111 protrudes toward the center of the first rotor punching sheet 11, and the protruding position can be connected to the connecting part. Therefore, when the air in the first flow hole 112 enters the first permanent magnet slot 111 through the connecting part, since the oil-gas mixture enters from the protruding position, when the oil-gas mixture flows in the first permanent magnet slot 111, the first permanent magnet slot 111 can guide the oil-gas mixture, so that the oil-gas mixture can quickly flow through the entire first permanent magnet slot 111, thereby improving the heat dissipation rate of the permanent magnet 21.

[0086] like Figure 1As shown, in some embodiments of the present application, the first permanent magnet slot 111 includes a first slot section 1111 and a second slot section 1112. The first slot section 1111 and the second slot section 1112 are sequentially distributed and connected in the circumferential direction. The distance from the center of the first rotor punching 11 to the first slot section 1111 gradually decreases in the direction approaching the second slot section 1112, and the distance from the center of the first rotor punching 11 to the second slot section 1112 gradually decreases in the direction approaching the first slot section 1111. The connection between the first slot section 1111 and the second slot section 1112 is connected to the corresponding first flow hole 112 through a first connection portion 113. It can be understood that through the above arrangement, a streamlined structure is formed in the direction from the connection to the free end of the first slot section 1111, which facilitates the rapid flow of the oil-gas mixture through the first slot section 1111 after entering from the first connection. A streamlined structure is formed in the direction from the connection to the free end of the second slot section 1112, which facilitates the rapid flow of air through the second slot section 1112 after entering from the connection. That is, through the above arrangement, the rate of air flowing through the first permanent magnet slot 111 can be increased, and the heat dissipation effect on the permanent magnet 21 can be improved.

[0087] In some embodiments, the first permanent magnet slot 111 can be configured as an arc structure, a "V" - shaped structure, a "匚" - shaped structure, a "U" - shaped structure, a "-" - shaped structure or other structures, etc., which are not limited herein.

[0088] As Figure 1 As shown, in some embodiments of the present application, a plurality of first rivet holes 114 are provided on the first rotor punching 11, and at least two adjacent first permanent magnet slots 111 are provided with first rivet holes 114. It can be understood that the first rivet holes 114 are adapted to receive rivets 24, and the rivets 24 are adapted to pass through the first rivet holes 114 of a plurality of first rotor punchings 11 to fix the plurality of first rotor punchings 11, improving the structural stability of the rotor 20 lamination assembly.

[0089] By providing the first rivet holes 114 between at least two adjacent first permanent magnet slots 111, it can be that an opening position is defined between adjacent first permanent magnet slots 111, and at least one opening position between adjacent opening positions is provided with a rivet 24 hole. Thus, the opening symmetry of the first rotor punching 11 can be improved, so as to ensure that the mass distribution of the first rotor punching 11 in the circumferential direction is more uniform, and further improve the rotational stability of the rotor 20 lamination assembly.

[0090] As Fig.14 As shown is the temperature curve graph of the permanent magnet 21 according to the embodiment of the present application and the permanent magnet in the prior art. The present application directly dissipates heat from the permanent magnet 21 through a fluid. At different rotational speeds, the temperature of the permanent magnet 21 can be improved by 10 - 20 °C, thereby enhancing the magnetic performance of the permanent magnet 21. As Fig.15Shown is a COP comparison chart between the compressor 40 of the embodiment of the present application and the compressor of the prior art. In the art, the energy efficiency of the compressor 40 is generally expressed by COP, COP = refrigeration capacity * 100% / input power. Under the same refrigeration capacity, the lower the input power (that is, the lower the energy consumption), the higher the COP. Similarly, under the same input power, the higher the refrigeration capacity, the higher the COP. Compared with the prior art, the compressor 40 of the present application can achieve a COP improvement of about 3% under various working conditions, making a considerable contribution to energy conservation and emission reduction for the country and society. Fig.16 The figure shows the oil discharge rate of the compressor 40 according to the embodiment of the present application and the compressor of the prior art. The compressor is a precision machine that requires oil to keep the mechanical parts lubricated at all times. If the oil is greatly reduced or lost, the compressor will soon fail. The lower the oil discharge rate, the more oil is stored in the compressor pump body, and the higher the reliability of the compressor. Compared with the prior art, the oil discharge rate of the compressor provided by the present application is improved by about 20%, which greatly improves the reliability of the compressor.

[0091] The rotor 20 according to the embodiment of the present application is briefly described below.

[0092] like Fig. 9 and Fig.10 As shown, according to the embodiment of the present application, the rotor 20 is provided with the rotor core 10 of the above-mentioned embodiment. Since the rotor 20 of the embodiment of the present application is provided with the rotor core 10 of the above-mentioned embodiment, the rotor core 10 can ensure that the oil-gas mixture of the pump body 41 can flow from the first connecting portion 113 to the first permanent magnet slot 111 when flowing through the first connecting hole, thereby achieving cooling of the permanent magnet 21 in the first permanent magnet slot 111 and improving the performance of the permanent magnet 21.

[0093] like Fig. 9 and Fig.10 As shown, in some embodiments of the present application, the rotor 20 further includes a permanent magnet 21, an end plate 22 and a balancing block 23. The permanent magnet 21 can be arranged in the first permanent magnet slot 111. In a specific embodiment, the permanent magnet 21 is arranged in the rotor core 10 to form 8 magnetic poles. The rotor core 10, the end plate 22 and the balancing block 23 can be fixed by rivets 24. The end plate 22 can be arranged at least at one end of the rotor 20 lamination assembly in the axial direction. The end plate 22 is provided with a through hole 221 that penetrates in the thickness direction. In the axial projection, at least a portion of the through hole 221 overlaps with the first flow hole 112. The balancing block 23 can enable the rotor 20 to maintain dynamic balance under high-speed rotation.

[0094] The rotor 20 is provided with a pump body 41 at the bottom, and the motor 30 can drive the pump body 41 to rotate, and the pump body 41 generates high-temperature and high-pressure gas, which can be mixed with oil to form an oil-gas mixture (the temperature of the oil-gas mixture is lower than the temperature of the permanent magnet 21), and the oil-gas mixture flows into the flow hole 25 of the rotor 20, and the flow hole 25 can be formed by axially superimposing the first flow hole 112 and the second flow hole 132 or the third flow hole 142, and the flow hole 25 can also be formed by axially superimposing the first flow hole 112 and the rotor through hole 122. Under the influence of the oil-gas mixture, the oil-gas mixture flows to the connecting part through the flow hole 25, and then flows from the connecting part to the groove of the permanent magnet 21, thereby reducing the temperature of the permanent magnet 21, improving the performance of the permanent magnet 21, and improving the energy efficiency of the compressor 40. A vent hole 222 is also formed on the end plate 22, which is arranged opposite to the first permanent magnet groove 111. After the oil-gas mixture hits the groove of the permanent magnet 21 or the upper end plate 22, due to the density of the oil and gas, the oil flows back to the bottom and the gas flows upward through the vent hole 222, thereby realizing oil and gas separation, improving the oil discharge rate of the compressor 40, and improving the reliability of the compressor 40.

[0095] The motor 30 according to the embodiment of the present application is briefly described below.

[0096] like Fig.11 As shown, the motor 30 according to the embodiment of the present application is provided with the rotor 20 and the stator 31 of the above embodiment, and the stator 31 includes a stator core 311 and a stator winding 312. Since the motor 30 according to the embodiment of the present application is provided with the rotor 20 of the above embodiment, the pump body 41 in the motor 30 can produce an oil-gas mixture, and the oil-gas mixture can reduce the temperature of the permanent magnet 21, improve the performance of the permanent magnet 21, and improve the energy efficiency of the compressor 40. After the oil-gas mixture hits the groove of the permanent magnet 21 or the upper end plate 22, the oil flows back to the bottom and the gas flows upward through the air vent 222, thereby realizing oil-gas separation, improving the oil discharge rate of the compressor 40, and improving the reliability of the compressor 40.

[0097] The compressor 40 according to the embodiment of the present application is briefly described below.

[0098] like Fig.12As shown, the compressor 40 according to the embodiment of the present application is provided with a shell 42 and a base 43 of the above-mentioned embodiment, and a motor 30 and a pump body 41 located inside the shell 42. The motor 30 can drive the pump body 41 to rotate, and the pump body 41 produces high-temperature and high-pressure gas, which can be mixed with oil to form an oil-gas mixture. Since the compressor 40 of the embodiment of the present application is provided with the motor 30 of the above-mentioned embodiment, the compressor 40 can produce an oil-gas mixture when working. The oil-gas mixture can reduce the temperature of the permanent magnet 21, improve the performance of the permanent magnet 21, and improve the energy efficiency of the compressor 40. After the oil-gas mixture hits the groove of the permanent magnet 21 or the upper end plate 22, the oil flows back to the bottom, and the gas flows upward through the air vent 222, thereby realizing oil-gas separation, improving the oil discharge rate of the compressor 40, and improving the reliability of the compressor 40.

[0099] The air conditioner 50 according to the embodiment of the present application is briefly described below.

[0100] like Fig.13 As shown, the air conditioner 50 according to the embodiment of the present application includes the compressor 40 described in any of the above embodiments. The compressor 40 of the air conditioner 50 can generate an oil-gas mixture when working. The oil-gas mixture can reduce the temperature of the permanent magnet 21, improve the performance of the permanent magnet 21, and improve the energy efficiency of the compressor 40. After the oil-gas mixture hits the groove of the permanent magnet 21 or the upper end plate 22, the oil flows back to the bottom and the gas flows upward through the air vent 222, thereby realizing oil and gas separation, improving the oil discharge rate of the compressor 40, and improving the reliability of the compressor 40.

[0101] In the description of the present application, 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", "axial", "radial", "circumferential" 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 application 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 application.

[0102] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0103] In the description of the present application, “plurality” means two or more.

[0104] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0105] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0106] 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 present application. 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 may be combined in any one or more embodiments or examples in a suitable manner.

[0107] Although the embodiments of the present application 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 application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A rotor core, characterized in that: include: a first rotor punching sheet, on which a plurality of first permanent magnet slots, a plurality of first flow holes and a plurality of first connecting portions are provided, wherein the first flow holes, the first connecting portions and the first permanent magnet slots are sequentially distributed away from the center of the first rotor punching sheet in a radial direction; in At least one of the first permanent magnet slots is communicated with one of the first flow holes through the first communication portion.

2. The rotor core according to claim 1, characterized in that: At least one of the first permanent magnet slots is communicated with the first flow hole adjacent thereto in the radial direction of the first rotor punching sheet through the first communication portion.

3. The rotor core according to claim 2, characterized in that: Also includes: a second rotor punching sheet, wherein a plurality of second permanent magnet slots suitable for accommodating the permanent magnets are arranged on the second rotor punching sheet, the plurality of second permanent magnet slots are arranged in one-to-one correspondence with the plurality of first permanent magnet slots, and a rotor through hole is also arranged on the second rotor punching sheet; in A projection of the first flow hole in the axial direction is located inside a projection of the rotor through hole.

4. The rotor core according to claim 3, characterized in that: The radius of the rotor through hole is R, and the maximum distance between the radial outer side wall of the first flow hole and the center of the first rotor punching sheet is L and satisfies: L≤R.

5. The rotor core according to claim 3, characterized in that: The first rotor punching sheets and the second rotor punching sheets are alternately arranged in the axial direction.

6. The rotor core according to claim 3, characterized in that: The first rotor punching sheet is constructed in plurality and overlapped in the axial direction to form a first rotor punching sheet group, the second rotor punching sheet is constructed in plurality and overlapped in the axial direction to form a second rotor punching sheet group, and the first rotor punching sheet group and the second rotor punching sheet group are alternately arranged in the axial direction.

7. The rotor core according to claim 2, characterized in that: Also includes: a third rotor punching sheet, wherein the third rotor punching sheet is provided with a plurality of third permanent magnet slots, a plurality of second flow holes and a plurality of second connecting parts, the plurality of third permanent magnet slots are arranged in one-to-one correspondence with the plurality of first permanent magnet slots, and at least one of the third permanent magnet slots is connected with the second flow hole adjacent to it in the radial direction through the second connecting part; In the axial direction, projections of the first rotor punching sheet and the third rotor punching sheet do not completely overlap.

8. The rotor core according to claim 7, characterized in that: In the axial direction, the second communicating portion does not overlap with at least a portion of the first communicating portion.

9. The rotor core according to claim 7, characterized in that: The first rotor punching sheets and the third rotor punching sheets are alternately arranged in the axial direction.

10. The rotor core according to claim 7, characterized in that: The first rotor punching sheet is constructed in plurality and overlapped in the axial direction to form a first rotor punching sheet group. The third rotor punching sheet is constructed in plurality and overlapped in the axial direction to form a third rotor punching sheet group. The first rotor punching sheet group and the third rotor punching sheet group are alternately arranged in the axial direction.

11. The rotor core according to claim 2, characterized in that: Also includes: a fourth rotor punching sheet, wherein the fourth rotor punching sheet is provided with a plurality of fourth permanent magnet slots and a plurality of third flow holes, the plurality of fourth permanent magnet slots are arranged in one-to-one correspondence with the plurality of first permanent magnet slots, and the plurality of third flow holes are arranged in one-to-one correspondence with the plurality of first flow holes; in A reinforcement area is formed between the plurality of fourth permanent magnet slots and the plurality of third flow holes, and in the axial direction, the first connecting portion is arranged opposite to the reinforcement area.

12. The rotor core according to claim 11, characterized in that: The fourth rotor punching sheets and the first rotor punching sheets are arranged alternately in the axial direction.

13. The rotor core according to claim 12, 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.

14. A rotor, characterized in that: The invention comprises a rotor core as claimed in any one of claims 1 to 13.

15. The rotor according to claim 14, 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.

16. The rotor according to claim 15, characterized in that The end plate is also formed with an air vent which penetrates the end plate in the axial direction, and the air vent is arranged opposite to the first permanent magnet slot.

17. A motor, characterized in that: Comprising a rotor as claimed in any one of claims 14 to 16.

18. A compressor, characterized in that: Comprising a motor as claimed in claim 17.

19. An air conditioner, characterized in that: Comprising a compressor as claimed in claim 18.

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