Rotor, motor, compressor and refrigeration equipment

Abstract

The invention provides a rotor, a motor, a compressor and refrigeration equipment, and the rotor comprises a rotor iron core, the rotor iron core comprises a plurality of rotor punching sheets, the plurality of rotor punching sheets are stacked along the axial direction of the rotor iron core, each rotor punching sheet is provided with a plurality of magnet grooves, the plurality of magnet grooves are arranged at intervals along the circumferential direction of the rotor iron core, and the magnet grooves are arranged at intervals along the axial direction of the rotor iron core. The plurality of magnet grooves which are opposite in the axial direction of the rotor iron core are communicated to form slots, the plurality of rotor punching sheets comprise a plurality of first punching sheets, each first punching sheet is provided with at least one elastic piece, and the at least one elastic piece is located in the at least one magnet groove; the magnets are arranged in the slots respectively, and at least one magnet abuts against at least one elastic piece in the slot where the magnet is located.

Description

Technical Field

[0001] The present invention relates to the technical field of motor equipment, and in particular to a rotor, a motor, a compressor and a refrigeration device. Background Art

[0002] At present, brushless permanent magnet motors are divided into magnetic steel surface mounted rotors and magnetic steel inserted rotors. Due to the centrifugal force of the rotor, magnetic steel embedded rotors are widely used in motors, especially high-speed motors.

[0003] Since the magnet and the magnet slot are clearance fit, the relevant technology generally adopts methods such as integral rotor injection molding / potting, applying adhesive between the magnet and the magnet slot, adding end plates at both axial ends of the rotor, or adding expansion material in the magnet slot to fix the magnet to the magnet slot to ensure the motor performance.

[0004] However, the above fixing methods require the use of multiple materials such as glue, plastic, and end plates, which require additional processes during production, resulting in low production efficiency and high production costs. At the same time, in the long-term environment of refrigerant and lubricant, glue, plastic, etc. will have compatibility problems, affecting product performance, and even causing the permanent magnet steel and the rotor core to fail to fix, resulting in failure. Summary of the invention

[0005] The embodiments of the present invention are intended to solve at least one of the technical problems existing in the prior art.

[0006] To this end, a first aspect of an embodiment of the present invention provides a rotor.

[0007] A second aspect of an embodiment of the present invention provides an electric motor.

[0008] A third aspect of an embodiment of the present invention provides a compressor.

[0009] A fourth aspect of an embodiment of the present invention provides a refrigeration device.

[0010] In view of this, according to a first aspect of an embodiment of the present invention, a rotor is provided, comprising: a rotor core, the rotor core comprising a plurality of rotor punchings, the plurality of rotor punchings being stacked along the axial direction of the rotor core, each rotor punching being provided with a plurality of magnet slots, the plurality of magnet slots being arranged at intervals along the circumferential direction of the rotor core, a plurality of magnet slots opposite to each other along the axial direction of the rotor core being connected to form slots, the plurality of rotor punchings comprising a plurality of first punchings, each first punching being provided with at least one elastic member, at least one elastic member being located in at least one magnet slot; a plurality of magnets being respectively disposed in a plurality of slots, at least one magnet being counteracted against at least one elastic member in the slot where the magnet is located.

[0011] The rotor provided in the embodiment of the present invention includes a rotor core and a plurality of magnets. Specifically, the rotor core includes a plurality of rotor punchings. Specifically, the plurality of rotor punchings are stacked along the axial direction of the rotor core. Specifically, the plurality of rotor punchings can be stacked in sequence from bottom to top along the axial direction, or can be stacked in sequence from top to bottom along the axial direction. Specifically, it can be set according to actual needs.

[0012] Each rotor punching sheet is provided with a plurality of magnet slots, and the plurality of magnet slots are arranged along the circumferential direction of the rotor core. The plurality of magnet slots of the plurality of rotor punching sheets that are axially opposite to each other are connected to form a slot.

[0013] The plurality of rotor punching sheets include a plurality of first punching sheets, and it is understood that the plurality of first punching sheets have the same shape and size. Each first punching sheet is provided with at least one elastic member, and the at least one elastic member is located in at least one magnet slot, so that at least one slot has a plurality of elastic members.

[0014] When multiple magnets are inserted into multiple slots respectively, the magnet in the slot with an elastic part is abutted against the elastic part in the slot to fix at least one magnet, thereby ensuring the clearance fit between the magnet and the slot wall of the slot where it is located, while ensuring the fixing effect of the magnet in the slot, preventing the magnet from shaking, enhancing the stability of the magnet, and thereby reducing the noise of the motor with the rotor during operation, ensuring the motor performance and reliability.

[0015] Moreover, it can be understood that during the process of inserting the magnet into the slot, the magnet and the elastic part are abutted against each other, that is, the elastic part is squeezed to cause the elastic part to deform, and the magnet is firmly fixed in the slot by utilizing the deformation elastic force of the elastic part. In other words, during the process of inserting the magnet, the magnet can be fixed in the slot, which is simple to assemble, effectively reduces the difficulty of assembly, improves production efficiency, and reduces the production cost of the rotor.

[0016] Compared with the related technologies that use integral rotor injection molding / potting, adhesive glue between the magnet and the magnet slot, end plates at both ends of the rotor axis, or expansion materials in the magnet slot to fix the magnet to the magnet slot, it can simplify the production process of the motor, reduce motor parts, and thus reduce the production cost of the motor. At the same time, in the long-term environment of refrigerant and lubricant, it avoids compatibility issues with glue, plastic, etc., ensures motor performance, and improves the stability and reliability of the motor during operation.

[0017] Optionally, the elastic member and the first punching sheet where it is located are an integrated structure, which further reduces the manufacturing difficulty of the rotor, improves production efficiency, and reduces production costs.

[0018] Optionally, the rotor punching sheets are silicon steel sheets.

[0019] Optionally, each slot has an elastic member, so that the magnet inserted into each slot can be fixed, further improving the performance of the motor with the rotor and meeting the requirements of the compressor with the motor. It can also improve the fixing strength of the magnet in the slot, prevent the magnet from shaking, and ensure the motor performance.

[0020] Optionally, the magnet comprises magnetic steel.

[0021] Optionally, the number of slots is an even number.

[0022] Optionally, one end of the elastic member is connected to the rotor core, and the other end extends in the horizontal direction, or the other end is inclined at a certain angle relative to the horizontal plane.

[0023] In addition, the rotor provided according to the above technical solution of the present invention also has the following additional technical features:

[0024] In some technical solutions, optionally, the number of elastic members is at least two; at least two elastic members are located in one magnet slot; or at least two elastic members are located in different magnet slots, respectively.

[0025] In this technical solution, the number of elastic parts is limited to at least two. Specifically, at least two elastic parts are located in one magnet slot. That is to say, there are at least two elastic parts in one magnet slot, thereby improving the fixing strength of the magnet in the slot, preventing the magnet from shaking, and enhancing the stability of the magnet, thereby reducing the noise of the motor with the rotor during operation and ensuring the motor performance and reliability.

[0026] Alternatively, at least two elastic members are respectively located in different magnet slots, that is, at least two slots have elastic members, thereby improving the fixing effect of at least two magnets and further improving the performance of the motor having the rotor.

[0027] In some technical solutions, optionally, at least two elastic members extend in different directions in at least one magnet slot.

[0028] In this technical solution, it is defined that the extension directions of at least two elastic members in at least one magnet slot are different.

[0029] Specifically, when at least two elastic members are located in one magnet slot, the extension directions of the at least two elastic members in the magnet slot are different. That is, one end of the at least two elastic members is connected to the rotor core, and the other end extends in different directions in one magnet slot, thereby providing deformation elastic force to the inserted magnet in different directions, further improving the fixing strength of the magnet, avoiding the shaking of the magnet, and reducing the noise of the motor having the rotor during operation.

[0030] Alternatively, when at least two elastic members are located in different magnet slots, since the at least two elastic members extend in different directions, deformation elastic forces are provided to the at least two magnets in different directions, so that the at least two magnets are firmly fixed in different slots.

[0031] Compared with the related technologies that use integral rotor injection molding / potting, adhesive glue between the magnet and the magnet slot, end plates at both ends of the rotor axis, or expansion materials in the magnet slot to fix the magnet to the magnet slot, it can simplify the production process of the motor, reduce motor parts, and thus reduce the production cost of the motor. At the same time, in the long-term environment of refrigerant and lubricant, it avoids compatibility issues with glue, plastic, etc., ensures motor performance, and improves the stability and reliability of the motor during operation.

[0032] In some technical solutions, optionally, at least one elastic member extends in the radial direction of the rotor core in at least one magnet slot; and / or at least one elastic member extends in the circumferential direction of the rotor core in at least one magnet slot.

[0033] In this technical solution, at least one elastic member extends in the radial direction of the rotor core in at least one magnet slot. It can be understood that when the magnet is inserted into the slot, the magnet is offset against the radially extending elastic member, that is, the elastic member provides elastic force to the magnet in the radial direction to press and fix the magnet in the radial direction, thereby improving the stability of the magnet and ensuring the performance and reliability of the motor with the rotor.

[0034] At least one elastic member extends along the circumferential direction of the rotor core in at least one magnet slot. It can be understood that when the magnet is inserted into the slot, the magnet is offset against the circumferentially extending elastic member, that is, the elastic member provides elastic force for the magnet in the circumferential direction to press and fix the magnet in the circumferential direction, thereby improving the stability of the magnet and ensuring the performance and reliability of the motor having the rotor.

[0035] Optionally, when at least two elastic members are located in one magnet slot, at least one elastic member extends circumferentially in the magnet slot, and at least one elastic member extends radially in the magnet slot, so that in one slot, elastic forces are applied to the magnet in two different directions, radially and circumferentially, further improving the fixing effect of the magnet in the slot, avoiding the shaking of the magnet, and reducing the noise during the operation of the motor. The assembly is simple, the production process is simplified, and the production cost of the motor is reduced.

[0036] Optionally, on the same first punch, since the length of the radially extending elastic member is longer than the length of the circumferentially extending elastic member, the elastic force of the radially extending elastic member is smaller than the elastic force of the axially extending elastic member.

[0037] In some technical schemes, optionally, each first punching sheet is provided with an elastic member; when a plurality of rotor punching sheets are stacked along the axial direction of the rotor core, at least one of the plurality of first punching sheets is rotated by a preset angle relative to the remaining first punching sheets of the plurality of first punching sheets, so that the elastic members on at least two first punching sheets are distributed in different slots.

[0038] In this technical solution, an elastic part is provided for each first punching sheet. Since the shapes and sizes of the multiple first punching sheets are relative, when multiple rotor punching sheets are stacked, at least one first punching sheet is rotated by a preset angle relative to the remaining first punching sheets, so that the elastic part on the first punching sheet and the elastic part on the previous first punching sheet are located in different slots, thereby fixing the magnets in different slots, avoiding shaking of the magnets, and reducing noise during motor operation.

[0039] Optionally, among the multiple first punches, each first punch is rotated by a preset angle compared to the previous first punch when stacked, so that each slot has at least one elastic member, thereby reducing the production cost of the rotor while providing a fixing effect for each magnet.

[0040] In some technical solutions, optionally, an interference length L between at least one magnet and at least one elastic member in the slot where the magnet is located satisfies 0.05 mm ≤ L ≤ 0.2 mm.

[0041] In this technical solution, the interference length between at least one magnet and at least one elastic member in the slot where the magnet is located is between 0.05mm and 0.2mm, that is, the protruding length of at least one elastic member in the magnet slot is limited to between 0.05mm and 0.2mm, that is, the length of at least one elastic member in contact with the magnet in the slot is limited. In this way, while ensuring that the elastic member generates sufficient elastic force to fix the magnet in the slot, it is possible to avoid excessive deformation of the elastic member and loss of resilience. In other words, the cooperation between the elastic member and the magnet is controlled within a certain range to ensure the elastic pressure of the elastic member on the magnet, further improving the fixing strength of the magnet.

[0042] In some technical solutions, optionally, the rotor core also includes at least one avoidance groove, and the at least one avoidance groove is arranged on at least one rotor punching sheet. In at least two adjacent rotor punching sheets, at least one avoidance groove is opposite to at least one elastic member along the axial direction of the rotor core.

[0043] In this technical solution, it is defined that the rotor core further includes at least one avoidance groove, specifically, at least one avoidance groove is arranged on at least one rotor punching sheet, specifically, one rotor punching sheet has multiple avoidance grooves, or multiple avoidance grooves are distributed on different rotor punching sheets. It can be specifically arranged according to actual needs.

[0044] Along the axial direction of the rotor core, in at least two adjacent rotor punchings, at least one avoidance groove is opposite to at least one elastic member, so as to avoid interference with adjacent rotor punchings due to deformation of the elastic member after the magnet is inserted.

[0045] Optionally, the rotor punching with the elastic member, that is, the first punching, is provided with an avoidance groove. And / or, the rotor punching without the elastic member, that is, the second punching, is provided with an avoidance groove.

[0046] It is understandable that when the magnet is inserted into the slot from top to bottom along the axial direction, the rotor punching at the bottom cannot have an elastic member. The rotor punching at the top can have an elastic member or not. And the position where the rotor punching at the bottom is opposite to the elastic member needs to be provided with an avoidance groove.

[0047] When the magnet is inserted into the slot from bottom to top along the axial direction, the rotor punching at the top cannot have an elastic part. The rotor punching at the bottom can have an elastic part or not. And the position where the rotor punching at the top is opposite to the elastic part needs to be provided with an avoidance groove. It can be set according to actual needs.

[0048] Optionally, the width of the avoidance groove is greater than or equal to the width of the elastic member. Specifically, when the elastic member extends radially, the circumferential width of the avoidance groove is less than or equal to the width of the elastic member. When the elastic member extends circumferentially, the radial width of the avoidance groove is less than or equal to the width of the elastic member.

[0049] Optionally, along the axial direction of the rotor core, the depth of the avoidance groove is greater than or equal to the height of the elastic member after deformation, that is, when the magnet is inserted into the slot, the free end of the elastic member cannot exceed the avoidance groove after deformation.

[0050] Optionally, each first punch is rotated by a preset angle relative to the previous first punch, and the magnetic poles are aligned, arranged axially and stacked.

[0051] Optionally, the preset angle α satisfies α=360 / n. That is, when a plurality of first punching sheets are stacked, they are rotated by one magnetic pole angle each time they are stacked, the magnetic pole edges are aligned, and the elastic member is aligned with the avoidance grooves of the upper and lower adjacent layers.

[0052] In some technical schemes, optionally, on each first punching sheet and in at least one magnet slot, the number m of elastic members extending along the circumferential direction of the rotor core and the number n of magnet slots satisfy 1≤m≤2 / n; and / or on each first punching sheet and in at least one magnet slot, the number z of elastic members extending along the radial direction of the rotor core and the number n of magnet slots satisfy 1≤z≤2 / n.

[0053] In this technical solution, on each first punching sheet and in at least one magnet slot, the number of elastic members extending in the circumferential direction is less than or equal to half the number of magnet slots. By limiting the number of elastic members extending in the circumferential direction, the elastic members extending in the circumferential direction can be arranged in different magnet slots at intervals, and then when multiple rotor punching sheets of the same shape are stacked in the axial direction, the rotor punching sheets can be staggered with the elastic members of adjacent rotor punching sheets after rotating at a preset angle, so as to avoid interference after deformation.

[0054] On each first punching sheet and in at least one magnet slot, the number of elastic members extending in the radial direction is less than or equal to half the number of magnet slots. By limiting the number of elastic members extending in the radial direction, the elastic members extending in the radial direction can be arranged in different magnet slots at intervals, and then when multiple rotor punching sheets of the same shape are stacked in the axial direction, the rotor punching sheets can be staggered with the elastic members of adjacent rotor punching sheets after rotating at a preset angle, so as to avoid interference after deformation.

[0055] It is understandable that two adjacent magnet slots cannot have elastic members extending in the same direction at the same time. That is, two elastic members extending in the magnet slots in the same direction cannot be located in two adjacent magnet slots. In other words, on a first punching sheet, elastic members extending in the same direction need to be arranged in different magnet slots at intervals.

[0056] Optionally, the plurality of magnet slots include two first magnet slots and a second magnet slot, the second magnet slot is located between the two first magnet slots, the two elastic members are respectively arranged in the two first magnet slots, and the second magnet slot is provided with an escape slot. Alternatively, the plurality of magnet slots include two first magnet slots and two second magnet slots, the two second magnet slots are located between the two first magnet slots, the two elastic members are respectively arranged in the two first magnet slots, and one of the two second magnet slots is provided with an escape slot. The specific arrangement can be made according to actual needs.

[0057] Optionally, on each first punching sheet, the elastic member and the avoidance groove are alternately arranged in the plurality of magnet slots, that is, in two adjacent magnet slots, one is provided with the elastic member and the other is provided with the avoidance groove. Thus, after the plurality of first punching sheets are stacked in the axial direction, each elastic member has an avoidance space in the axial direction, and each slot has a plurality of elastic members, further improving the fixing effect of the plurality of magnets and ensuring the motor performance.

[0058] In some technical solutions, optionally, each first punching sheet is further provided with a mounting groove, the mounting groove is connected to the magnet groove, the first end of the elastic member is located in the mounting groove, and the second end of the elastic member is located in the magnet groove.

[0059] In this technical solution, it is defined that each first punching sheet is also provided with a mounting groove. Specifically, the mounting groove is connected to the magnet groove, one end of the elastic member is located in the mounting groove, and the other end extends into the magnet groove. By providing the mounting groove, the length of the elastic member can be increased accordingly, so that when the magnet is inserted into the slot, the elastic member can be quickly elastically deformed, thereby achieving the fixation of the magnet in the slot, preventing the magnet from shaking, and improving the stability of the magnet.

[0060] In some technical solutions, optionally, at least one elastic member is located radially inside the magnet; at least one rotor punching is also provided with an external magnetic bridge, and the external magnetic bridge is located radially outside the magnet.

[0061] In this technical solution, it is defined that at least one elastic member is located radially inside the magnet, that is, at least one elastic member generates an elastic force pressing the magnet outward.

[0062] At least one rotor punching is also provided with an external magnetic bridge, and the external magnetic bridge is located radially outside the magnet, that is, the magnet is fixed on both sides of the radial direction of the magnet, so as to ensure the consistency of the magnetic field near the air gap, improve the installation stability of the magnet, and thereby increase the structural stability of the rotor.

[0063] Optionally, each rotor punching sheet is provided with an external magnetic bridge, so as to improve the fixing effect of the magnet, ensure the structural strength of the rotor, and control the dimensional accuracy of the slot.

[0064] Optionally, an external magnetic bridge is provided on a portion of the rotor punchings, while an external magnetic bridge is not provided on another portion of the rotor punchings, thereby reducing part of the external magnetic bridge while achieving radial limitation of the magnet, reducing rotor leakage and improving motor performance.

[0065] In some technical solutions, optionally, the outer magnetic bridge is provided with an opening, and the opening is connected to the magnet slot.

[0066] In this technical solution, it is defined that the outer magnetic bridge is provided with an opening, and the opening is connected to the magnet slot, that is, the outer magnetic bridge is a magnetic-breaking bridge structure, so that the rotor leakage can be reduced while fixing the radial direction of the magnet, thereby improving the performance of the motor having the rotor.

[0067] In some technical solutions, optionally, the plurality of rotor punching sheets further include a second punching sheet, and along the axial direction of the rotor core, the second punching sheet is located at the end of the plurality of first punching sheets; wherein the second punching sheet is provided with an external magnetic bridge.

[0068] In this technical solution, it is defined that the multiple rotor punchings also include a second punching. Specifically, along the axial direction of the rotor core, the second punching is located at the end of the multiple first punchings, and the second punching is provided with an external magnetic bridge. That is to say, the rotor punching located at the end is provided with an external magnetic bridge, so that the magnet can be radially limited, providing strength to the rotor as a whole, and controlling the size accuracy of the slot, while canceling part of the external magnetic bridge structure setting to a certain extent, thereby reducing the electromagnetic eddy current loss caused by the existence of the external magnetic bridge structure and significantly improving the motor efficiency.

[0069] In some technical solutions, optionally, along the axial direction of the rotor core, an end of at least one magnet is provided with a chamfer.

[0070] In this technical solution, along the axial direction of the rotor core, the end of at least one magnet is provided with a chamfer, that is, the axial edge of the magnet is provided with a chamfer.

[0071] It can be understood that the magnet is inserted into the slot along the axial direction of the rotor core. By setting a chamfer at the end of the magnet, the chamfer can guide the elastic part to bend when the magnet is inserted into the slot, thereby reducing the difficulty of inserting the magnet and improving the assembly efficiency of the rotor.

[0072] Optionally, the chamfer comprises a straight chamfer or a round chamfer.

[0073] Optionally, when the chamfer includes a round chamfer, the dimension R of the chamfer is ≥ 0.25 mm.

[0074] In some technical solutions, optionally, an angle β between at least a portion of at least one elastic member and a horizontal plane where the rotor punching is located satisfies β≤45°.

[0075] In this technical solution, the angle between the elastic member and the horizontal plane where the rotor punching is located is limited to less than or equal to 45°, that is, the free end of the elastic member bends and extends in the slot in the insertion direction of the magnet, thereby facilitating the insertion of the magnet and further improving the assembly efficiency of the rotor.

[0076] Moreover, due to the provision of the elastic member, during the process of inserting the magnet into the slot, the magnet and the elastic member are abutted against each other, that is, the elastic member is squeezed to cause the elastic member to deform, and the magnet is firmly fixed in the slot by utilizing the deformation elastic force of the elastic member. That is to say, during the process of inserting the magnet, the magnet can be fixed in the slot, which is simple to assemble, effectively reduces the difficulty of assembly, improves production efficiency, and reduces the production cost of the rotor.

[0077] Compared with the related technologies that use integral rotor injection molding / potting, adhesive glue between the magnet and the magnet slot, end plates at both ends of the rotor axis, or expansion materials in the magnet slot to fix the magnet to the magnet slot, it can simplify the production process of the motor, reduce motor parts, and thus reduce the production cost of the motor. At the same time, in the long-term environment of refrigerant and lubricant, it avoids compatibility issues with glue, plastic, etc., ensures motor performance, and improves the stability and reliability of the motor during operation.

[0078] In some technical solutions, optionally, when a plurality of magnets are respectively inserted into a plurality of slots, there is a gap between at least one magnet and an inner wall of the slot where the magnet is located.

[0079] In this technical solution, when multiple magnets are respectively inserted into multiple slots, there is a gap between at least one magnet and the inner wall of the slot where it is located, that is, the gap between at least one magnet and the inner wall of the slot where it is located is matched, thereby reducing the difficulty of inserting the magnet and improving the assembly efficiency of the rotor.

[0080] Since at least one slot has an elastic part, when multiple magnets are respectively inserted into the multiple slots, the magnet in the slot with the elastic part will be offset against the elastic part in the slot to fix at least one magnet, thereby ensuring the clearance fit between the magnet and the slot wall of the slot where it is located, while ensuring the fixing effect of the magnet in the slot, preventing the magnet from shaking, and enhancing the stability of the magnet, thereby reducing the noise of the motor with the rotor during operation and ensuring the motor performance and reliability.

[0081] Moreover, it can be understood that during the process of inserting the magnet into the slot, the magnet and the elastic part are abutted against each other, that is, the elastic part is squeezed to cause the elastic part to deform, and the magnet is firmly fixed in the slot by utilizing the deformation elastic force of the elastic part. In other words, during the process of inserting the magnet, the magnet can be fixed in the slot, which is simple to assemble, effectively reduces the difficulty of assembly, improves production efficiency, and reduces the production cost of the rotor.

[0082] Compared with the related technologies that use integral rotor injection molding / potting, adhesive glue between the magnet and the magnet slot, end plates at both ends of the rotor axis, or expansion materials in the magnet slot to fix the magnet to the magnet slot, it can simplify the production process of the motor, reduce motor parts, and thus reduce the production cost of the motor. At the same time, in the long-term environment of refrigerant and lubricant, it avoids compatibility issues with glue, plastic, etc., ensures motor performance, and improves the stability and reliability of the motor during operation.

[0083] Optionally, each magnet is gap-matched with an inner wall of a slot in which the magnet is located.

[0084] According to a second aspect of the present invention, there is provided an electric motor, comprising a rotor as provided by any of the above technical solutions, and thus having all the beneficial technical effects of the rotor, which will not be described in detail herein.

[0085] Optionally, the electric motor comprises an inner rotor electric motor.

[0086] According to a third aspect of the present invention, a compressor is provided, comprising a rotor or a motor as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the rotor or the motor, which will not be repeated here.

[0087] Optionally, the compressor comprises a variable frequency compressor.

[0088] According to a fourth aspect of the present invention, there is provided a refrigeration device, comprising a compressor as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the compressor, which will not be described in detail here.

[0089] Optionally, the refrigeration device includes a refrigerator or an air conditioner.

[0090] Additional aspects and advantages according to the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] 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:

[0092] Figure 1 One of the structural schematic diagrams of a rotor according to an embodiment of the present invention is shown;

[0093] Figure 2 A second schematic structural diagram of a rotor according to an embodiment of the present invention is shown;

[0094] Figure 3 A third schematic structural diagram of a rotor according to an embodiment of the present invention is shown;

[0095] Figure 4 It shows one of the structural schematic diagrams of a rotor punching according to an embodiment of the present invention;

[0096] Figure 5 A second schematic diagram of the structure of a rotor punching according to an embodiment of the present invention is shown;

[0097] Figure 6 A third schematic diagram of the structure of a rotor punching according to an embodiment of the present invention is shown;

[0098] Figure 7A fourth structural schematic diagram of a rotor punching according to an embodiment of the present invention is shown;

[0099] Figure 8 A fifth structural schematic diagram of a rotor punching according to an embodiment of the present invention is shown;

[0100] Fig. 9 A sixth structural schematic diagram of a rotor punching according to an embodiment of the present invention is shown;

[0101] Fig.10 A seventh structural schematic diagram of a rotor punching according to an embodiment of the present invention is shown;

[0102] Fig.11 An eighth structural schematic diagram of a rotor punching according to an embodiment of the present invention is shown;

[0103] Fig.12 A ninth structural schematic diagram of a rotor punching according to an embodiment of the present invention is shown;

[0104] Fig.13 A tenth schematic diagram of the structure of a rotor punching according to an embodiment of the present invention is shown;

[0105] Fig.14 An eleventh schematic diagram of the structure of a rotor punching according to an embodiment of the present invention is shown;

[0106] Fig.15 A twelfth structural schematic diagram of a rotor punching according to an embodiment of the present invention is shown;

[0107] Fig.16 A schematic structural diagram of a magnet according to an embodiment of the present invention is shown.

[0108] in, Figures 1 to 16 The corresponding relationship between the reference numerals and the component names is as follows:

[0109] 100 rotor, 110 rotor core, 111 slot, 112 rotor punching sheet, 113 magnet slot, 114 first punching sheet, 115 second punching sheet, 116 mounting slot, 120 magnet, 130 elastic member, 140 avoidance slot, 150 outer magnetic bridge, 151 opening, 160 chamfer. DETAILED DESCRIPTION

[0110] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0111] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0112] Refer to the following Figures 1 to 16 The rotor 100, the motor, the compressor and the refrigeration device provided according to some embodiments of the present invention are described.

[0113] In one embodiment according to the present application, Figure 1 , Figure 2 and Figure 3 As shown, a rotor 100 is proposed, and the rotor 100 includes: a rotor core 110, the rotor core 110 includes a plurality of rotor punchings 112, the plurality of rotor punchings 112 are stacked along the axial direction of the rotor core 110, each rotor punching 112 is provided with a plurality of magnet slots 113, the plurality of magnet slots 113 are arranged at intervals along the circumferential direction of the rotor core 110, and the plurality of magnet slots 113 opposite to each other along the axial direction of the rotor core 110 are connected to form a slot 111, the plurality of rotor punchings 112 include a plurality of first punchings 114, each first punching 114 is provided with at least one elastic member 130, and at least one elastic member 130 is located in at least one magnet slot 113; a plurality of magnets 120 are respectively arranged in a plurality of slots 111, and at least one magnet 120 is abutted against at least one elastic member 130 in the slot 111 where the magnet 120 is located.

[0114] The rotor 100 provided in the embodiment of the present invention includes a rotor core 110 and a plurality of magnets 120. Specifically, the rotor core 110 includes a plurality of rotor punchings 112. Specifically, the plurality of rotor punchings 112 are stacked along the axial direction of the rotor core 110. Specifically, the plurality of rotor punchings 112 can be stacked sequentially from bottom to top along the axial direction, or can be stacked sequentially from top to bottom along the axial direction. The specific arrangement can be made according to actual needs.

[0115] Each rotor punching sheet 112 is provided with a plurality of magnet slots 113 , and the plurality of magnet slots 113 are arranged along the circumferential direction of the rotor core 110 . The plurality of magnet slots 113 axially opposite to each other of the plurality of rotor punching sheets 112 are connected to form a slot 111 .

[0116] The plurality of rotor punching sheets 112 include a plurality of first punching sheets 114. It is understood that the plurality of first punching sheets 114 have the same shape and size. Each first punching sheet 114 is provided with at least one elastic member 130, and at least one elastic member 130 is located in at least one magnet slot 113, so that at least one slot 111 has a plurality of elastic members 130.

[0117] When multiple magnets 120 are respectively inserted into multiple slots 111, the magnet 120 in the slot 111 having the elastic member 130 is abutted against the elastic member 130 in the slot 111 to fix at least one magnet 120, thereby ensuring the clearance fit between the magnet 120 and the slot wall of the slot 111 in which it is located, while ensuring the fixing effect of the magnet 120 in the slot 111, preventing the magnet 120 from shaking, enhancing the stability of the magnet 120, and further reducing the noise of the motor having the rotor 100 during operation, thereby ensuring the motor performance and reliability.

[0118] Moreover, it can be understood that, during the process of inserting the magnet 120 into the slot 111, the magnet 120 is abutted against the elastic member 130, that is, the elastic member 130 is squeezed to cause the elastic member 130 to deform, and the magnet 120 is firmly fixed in the slot 111 by utilizing the deformation elastic force of the elastic member 130. That is to say, during the process of inserting the magnet 120, the magnet 120 can be fixed in the slot 111, which is simple to assemble, effectively reduces the difficulty of assembly, improves production efficiency, and reduces the production cost of the rotor 100.

[0119] Compared with the related technologies that use integral rotor injection molding / potting, adhesive glue between the magnet and the magnet slot, end plates at both ends of the rotor axis, or expansion materials in the magnet slot to fix the magnet to the magnet slot, it can simplify the production process of the motor, reduce motor parts, and thus reduce the production cost of the motor. At the same time, in the long-term environment of refrigerant and lubricant, it avoids compatibility issues with glue, plastic, etc., ensures motor performance, and improves the stability and reliability of the motor during operation.

[0120] Optionally, the elastic member 130 and the first punching sheet 114 where it is located are an integrated structure, which further reduces the manufacturing difficulty of the rotor 100, improves production efficiency, and reduces production costs.

[0121] Optionally, the rotor punching sheets 112 are silicon steel sheets.

[0122] Optionally, each slot 111 has an elastic member 130, so that the magnet 120 inserted into each slot 111 can be fixed, further improving the performance of the motor with the rotor 100 and meeting the requirements of the compressor with the motor. It can also improve the fixing strength of the magnet 120 in the slot 111, prevent the magnet 120 from shaking, and ensure the motor performance.

[0123] Optionally, the magnet 120 includes magnetic steel.

[0124] Optionally, the number of slots 111 is an even number.

[0125] Optionally, one end of the elastic member 130 is connected to the rotor core 110 , and the other end extends in the horizontal direction, or the other end is inclined at a certain angle relative to the horizontal plane.

[0126] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.14 As shown, in some embodiments, optionally, the number of the elastic members 130 is at least two; at least two elastic members 130 are located in one magnet slot 113; or at least two elastic members 130 are located in different magnet slots 113, respectively.

[0127] In this embodiment, the number of elastic members 130 is limited to at least two. Specifically, at least two elastic members 130 are located in one magnet slot 113. That is, one magnet slot 113 has at least two elastic members 130. This can improve the fixing strength of the magnet 120 in the slot 111, prevent the magnet 120 from shaking, enhance the stability of the magnet 120, and further reduce the noise of the motor having the rotor 100 during operation, thereby ensuring the motor performance and reliability.

[0128] Alternatively, at least two elastic members 130 are respectively located in different magnet slots 113 , that is, at least two slots 111 have elastic members 130 , thereby improving the fixing effect of at least two magnets 120 and further improving the performance of the motor having the rotor 100 .

[0129] like Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.14 As shown, in some embodiments, optionally, at least two elastic members 130 extend in different directions within at least one magnet slot 113 .

[0130] In this embodiment, it is defined that the extension directions of at least two elastic members 130 in at least one magnet slot 113 are different.

[0131] Specifically, when at least two elastic members 130 are located in one magnet slot 113, the extension directions of the at least two elastic members 130 in the magnet slot 113 are different. That is, one end of the at least two elastic members 130 is connected to the rotor core 110, and the other end extends in different directions in one magnet slot 113, thereby providing deformation elastic force to the inserted magnet 120 in different directions, further improving the fixing strength of the magnet 120, preventing the magnet 120 from shaking, and reducing the noise of the motor having the rotor 100 during operation.

[0132] Alternatively, when at least two elastic members 130 are located in different magnet slots 113 , since the at least two elastic members 130 extend in different directions, deformation elastic forces are provided to at least two magnets 120 in different directions, so that at least two magnets are firmly fixed in different slots 111 .

[0133] Compared with the related technologies that use integral rotor injection molding / potting, adhesive glue between the magnet and the magnet slot, end plates at both ends of the rotor axis, or expansion materials in the magnet slot to fix the magnet to the magnet slot, it can simplify the production process of the motor, reduce motor parts, and thus reduce the production cost of the motor. At the same time, in the long-term environment of refrigerant and lubricant, it avoids compatibility issues with glue, plastic, etc., ensures motor performance, and improves the stability and reliability of the motor during operation.

[0134] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.14 As shown, in some embodiments, optionally, at least one elastic member 130 extends radially of the rotor core 110 within at least one magnet slot 113; and / or at least one elastic member 130 extends circumferentially of the rotor core 110 within at least one magnet slot 113.

[0135] In this embodiment, at least one elastic member 130 is in at least one magnet slot 113 and extends along the radial direction of the rotor core 110. It can be understood that when the magnet 120 is inserted into the slot 111, the magnet 120 is abutted against the radially extending elastic member 130, that is, the elastic member 130 provides elastic force for the magnet 120 in the radial direction to press and fix the magnet 120 in the radial direction, thereby improving the stability of the magnet 120 and ensuring the performance and reliability of the motor having the rotor 100.

[0136] At least one elastic member 130 is in at least one magnet slot 113 and extends along the circumferential direction of the rotor core 110. It can be understood that when the magnet 120 is inserted into the slot 111, the magnet 120 is abutted against the circumferentially extending elastic member 130, that is, the elastic member 130 provides elastic force for the magnet 120 in the circumferential direction to press and fix the magnet 120 in the circumferential direction, thereby improving the stability of the magnet 120 and ensuring the performance and reliability of the motor having the rotor 100.

[0137] Optionally, when at least two elastic members 130 are located in one magnet slot 113, at least one elastic member 130 extends circumferentially in the magnet slot 113, and at least one elastic member 130 extends radially in the magnet slot 113, so that in one slot 111, elastic force is applied to the magnet 120 located in the slot 111 in two different directions, radial and circumferential, to further improve the fixing effect of the magnet 120 in the slot 111, avoid shaking of the magnet 120, and reduce noise during the operation of the motor. The assembly is simple, the production process is simplified, and the production cost of the motor is reduced.

[0138] Optionally, on the same first punch 114 , since the length of the radially extending elastic member 130 is longer than that of the circumferentially extending elastic member 130 , the elastic force of the radially extending elastic member 130 is smaller than the elastic force of the axially extending elastic member 130 .

[0139] In some embodiments, optionally, each first punching sheet 114 is provided with an elastic member 130; when a plurality of rotor punching sheets 112 are stacked along the axial direction of the rotor core 110, at least one first punching sheet 114 among the plurality of first punching sheets 114 is rotated by a preset angle relative to the remaining first punching sheets 114 among the plurality of first punching sheets 114, so that the elastic members 130 on at least two first punching sheets 114 are distributed in different slots 111.

[0140] In this embodiment, an elastic member 130 is provided for each first punch 114. Since the shapes and sizes of the plurality of first punches 114 are relative, when a plurality of rotor punches 112 are stacked, at least one first punch 114 is rotated by a preset angle relative to the remaining first punches 114, so that the elastic member 130 on the first punch 114 and the elastic member 130 on the previous first punch 114 are located in different slots 111, thereby fixing the magnets 120 in different slots 111, preventing the magnets 120 from shaking, and reducing noise during the operation of the motor.

[0141] Optionally, among the multiple first punches 114, each first punch 114 is rotated by a preset angle compared to the previous first punch 114 when stacked, so that each slot 111 has at least one elastic member 130, thereby providing a fixing effect for each magnet 120 while reducing the production cost of the rotor 100.

[0142] like Figure 3 As shown, in some embodiments, optionally, an interference length L between at least one magnet 120 and at least one elastic member 130 in the slot 111 where the magnet 120 is located satisfies 0.05 mm≤L≤0.2 mm.

[0143] In this embodiment, the interference length between at least one magnet 120 and at least one elastic member 130 in the slot 111 where the magnet 120 is located is between 0.05 mm and 0.2 mm, that is, the protruding length of at least one elastic member 130 in the magnet slot 113 is limited to between 0.05 mm and 0.2 mm, that is, the length of at least one elastic member 130 in contact with the magnet 120 in the slot 111 is limited. Thus, while ensuring that the elastic member 130 generates sufficient elastic force to fix the magnet 120 in the slot 111, it is possible to prevent the elastic member 130 from being deformed too much and losing its resilience. In other words, the cooperation between the elastic member 130 and the magnet 120 is controlled within a certain range, ensuring the elastic pressure of the elastic member 130 on the magnet 120, and further improving the fixing strength of the magnet 120.

[0144] like Fig.14 As shown, in some embodiments, optionally, the rotor core 110 also includes at least one avoidance groove 140, and at least one avoidance groove 140 is provided on at least one rotor punching 112, and in at least two adjacent rotor punchings 112, at least one avoidance groove 140 is opposite to at least one elastic member 130 along the axial direction of the rotor core 110.

[0145] In this embodiment, it is defined that the rotor core 110 further includes at least one avoidance groove 140. Specifically, at least one avoidance groove 140 is provided on at least one rotor punching 112. Optionally, a rotor punching 112 has a plurality of avoidance grooves 140, or a plurality of avoidance grooves 140 are distributed on different rotor punchings 112. The avoidance grooves 140 may be provided specifically according to actual needs.

[0146] Along the axial direction of the rotor core 110 , in at least two adjacent rotor punchings 112 , at least one avoidance groove 140 is opposite to at least one elastic member 130 , so as to avoid interference with the adjacent first punchings 114 due to deformation of the elastic member 130 after the magnet 120 is inserted.

[0147] Optionally, the rotor punching 112 with the elastic member 130 , that is, the first punching 114 , is provided with the avoidance groove 140 . And / or, the rotor punching 112 without the elastic member 130 , that is, the second punching 115 , is provided with the avoidance groove 140 .

[0148] It is understandable that when the magnet 120 is inserted into the slot 111 from top to bottom along the axial direction, the rotor punching 112 at the bottom cannot have the elastic member 130. The rotor punching 112 at the top may have the elastic member 130 or not. And the position where the rotor punching 112 at the bottom and the elastic member 130 are opposite needs to be provided with an avoidance groove 140.

[0149] When the magnet 120 is inserted into the slot 111 from bottom to top along the axial direction, the rotor punching 112 at the top cannot have the elastic member 130. The rotor punching 112 at the bottom can have the elastic member 130 or not. And the position where the rotor punching 112 at the top is opposite to the elastic member 130 needs to be provided with an avoidance groove 140. It can be specifically provided according to actual needs.

[0150] Optionally, the width of the avoidance groove 140 is greater than or equal to the width of the elastic member 130. Specifically, when the elastic member 130 extends radially, the circumferential width of the avoidance groove 140 is less than or equal to the width of the elastic member 130. When the elastic member 130 extends circumferentially, the radial width of the avoidance groove 140 is less than or equal to the width of the elastic member 130.

[0151] Optionally, along the axial direction of the rotor core 110 , the depth of the avoidance groove 140 is greater than or equal to the height of the elastic member 130 after deformation, that is, when the magnet 120 is inserted into the slot 111 , the free end of the elastic member 130 cannot exceed the avoidance groove 140 after deformation.

[0152] Understandably, Fig.14 The direction of the middle arrow is the direction in which any first punching piece 114 rotates relative to the other first punching pieces 114 .

[0153] Optionally, each first punching sheet 114 is rotated by a preset angle relative to the previous first punching sheet 114 , and the magnetic poles are aligned, arranged axially, and stacked.

[0154] Optionally, the preset angle α satisfies α=360 / n. That is, when a plurality of first punching sheets 114 are stacked, they are rotated by one magnetic pole angle each time they are stacked, the magnetic pole edges are aligned, and the elastic member 130 is aligned with the avoidance grooves 140 of the upper and lower adjacent layers.

[0155] In some embodiments, optionally, on each first punching sheet 114 and in at least one magnet slot 113, the number m of elastic members 130 extending in the circumferential direction of the rotor core 110 and the number n of magnet slots 113 satisfy 1≤m≤2 / n; and / or on each first punching sheet 114 and in at least one magnet slot 113, the number z of elastic members 130 extending in the radial direction of the rotor core 110 and the number n of magnet slots 113 satisfy 1≤z≤2 / n.

[0156] In this embodiment, on each first punching sheet 114 and in at least one magnet slot 113, the number of elastic members 130 extending in the circumferential direction is less than or equal to half the number of magnet slots 113. By limiting the number of elastic members 130 extending in the circumferential direction, the elastic members 130 extending in the circumferential direction can be arranged in different magnet slots 113 at intervals, and then when a plurality of rotor punching sheets 112 of the same shape are stacked in the axial direction, the rotor punching sheets 112 can be staggered with the elastic members 130 of adjacent rotor punching sheets 112 after being rotated by a preset angle, so as to avoid interference after deformation.

[0157] On each first punching sheet 114 and in at least one magnet slot 113, the number of elastic members 130 extending in the radial direction is less than or equal to half the number of magnet slots 113. By limiting the number of elastic members 130 extending in the radial direction, the elastic members 130 extending in the radial direction can be arranged in different magnet slots 113 at intervals, and then when a plurality of rotor punching sheets 112 of the same shape are stacked in the axial direction, the rotor punching sheets 112 can be staggered with the elastic members 130 of adjacent rotor punching sheets 112 after rotating by a preset angle, so as to avoid interference after deformation.

[0158] It is understandable that two adjacent magnet slots 113 cannot have elastic members 130 extending in the same direction at the same time. That is, two elastic members 130 extending in the magnet slots 113 along the same direction cannot be located in two adjacent magnet slots 113. In other words, on one first punching sheet 114, the elastic members 130 extending in the same direction need to be arranged in different magnet slots 113 at intervals.

[0159] Optionally, the plurality of magnet slots 113 include two first magnet slots and a second magnet slot, the second magnet slot is located between the two first magnet slots, the two elastic members 130 are respectively disposed in the two first magnet slots, and the second magnet slot is provided with an avoidance slot 140. Alternatively, the plurality of magnet slots 113 include two first magnet slots and two second magnet slots, the two second magnet slots are located between the two first magnet slots, the two elastic members 130 are respectively disposed in the two first magnet slots, and one of the two second magnet slots is provided with an avoidance slot 140. The specific configuration can be made according to actual needs.

[0160] Optionally, on each first punching sheet 114, the elastic member 130 and the avoidance groove 140 are alternately arranged in the plurality of magnet slots 113, that is, in two adjacent magnet slots 113, one is provided with the elastic member 130, and the other is provided with the avoidance groove 140. Thus, after the plurality of first punching sheets 114 are stacked in the axial direction, each elastic member 130 has an avoidance space in the axial direction, and each slot 111 has a plurality of elastic members 130, further improving the fixing effect of the plurality of magnets 120 and ensuring the motor performance.

[0161] like Figure 4 As shown, in some embodiments, optionally, each first punch 114 is further provided with a mounting groove 116 , the mounting groove 116 is connected to the magnet groove 113 , the first end of the elastic member 130 is located in the mounting groove 116 , and the second end of the elastic member 130 is located in the magnet groove 113 .

[0162] In this embodiment, it is defined that each first punching sheet 114 is further provided with a mounting groove 116. Specifically, the mounting groove 116 is communicated with the magnet groove 113. One end of the elastic member 130 is located in the mounting groove 116, and the other end extends into the magnet groove 113. By providing the mounting groove 116, the length of the elastic member 130 can be increased accordingly, so that when the magnet 120 is inserted into the slot 111, the elastic member 130 can be quickly elastically deformed, thereby achieving the fixation of the magnet 120 in the slot 111, preventing the magnet 120 from shaking, and improving the stability of the magnet 120.

[0163] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.14 As shown, in some embodiments, optionally, at least one elastic member 130 is located radially inside the magnet 120 ; at least one rotor punching 112 is further provided with an external magnetic bridge 150 , and the external magnetic bridge 150 is located radially outside the magnet 120 .

[0164] In this embodiment, it is defined that at least one elastic member 130 is located radially inward of the magnet 120 , that is, the at least one elastic member 130 generates an elastic force pressing the magnet 120 outward.

[0165] At least one rotor punching 112 is also provided with an external magnetic bridge 150, and the external magnetic bridge 150 is located radially outside the magnet 120, that is, the magnet 120 is fixed on both sides of the radial direction of the magnet 120, so as to ensure the consistency of the magnetic field near the air gap, improve the installation stability of the magnet 120, and then increase the structural stability of the rotor 100.

[0166] Optionally, each rotor punching sheet 112 is provided with an external magnetic bridge 150 , so as to improve the fixing effect of the magnet 120 , ensure the structural strength of the rotor 100 , and control the dimensional accuracy of the slot 111 .

[0167] Optionally, an external magnetic bridge 150 is provided on a portion of the rotor punchings 112, while an external magnetic bridge 150 is not provided on another portion of the rotor punchings 112, thereby reducing part of the external magnetic bridge 150 while achieving radial limitation of the magnet 120, reducing magnetic leakage of the rotor 100, and improving motor performance.

[0168] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, in some embodiments, optionally, the outer magnetic bridge 150 is provided with an opening 151 , and the opening 151 is communicated with the magnet slot 113 .

[0169] In this embodiment, it is defined that the outer magnetic bridge 150 is provided with an opening 151, and the opening 151 is connected to the magnet slot 113, that is, the outer magnetic bridge 150 is a magnetic-breaking bridge structure, so that it can reduce the magnetic leakage of the rotor 100 while fixing the magnet 120 in the radial direction, thereby improving the performance of the motor having the rotor 100.

[0170] like Figure 2 , Fig.13 and Fig.15 As shown, in some embodiments, optionally, the plurality of rotor punching sheets 112 further include a second punching sheet 115 , and along the axial direction of the rotor core 110 , the second punching sheet 115 is located at the end of the plurality of first punching sheets 114 ; wherein the second punching sheet 115 is provided with an external magnetic bridge 150 .

[0171] In this embodiment, it is defined that the plurality of rotor punching sheets 112 also include a second punching sheet 115. Specifically, along the axial direction of the rotor core 110, the second punching sheet 115 is located at the end of the plurality of first punching sheets 114, and the second punching sheet 115 is provided with an external magnetic bridge 150. That is to say, the rotor punching sheet 112 located at the end is provided with an external magnetic bridge 150, so that the magnet 120 can be radially limited, providing strength to the rotor 100 as a whole, and controlling the dimensional accuracy of the slot 111. At the same time, part of the external magnetic bridge 150 structure setting is cancelled to a certain extent, thereby reducing the electromagnetic eddy current loss caused by the existence of the external magnetic bridge 150 structure, and significantly improving the motor efficiency.

[0172] like Fig.16 As shown, in some embodiments, optionally, along the axial direction of the rotor core 110 , an end of at least one magnet 120 is provided with a chamfer 160 .

[0173] In this embodiment, along the axial direction of the rotor core 110 , an end of at least one magnet 120 is provided with a chamfer 160 , that is, an axial edge of the magnet 120 is provided with a chamfer 160 .

[0174] It can be understood that the magnet 120 is inserted into the slot 111 along the axial direction of the rotor core 110. By setting a chamfer 160 at the end of the magnet 120, when the magnet 120 is inserted into the slot 111, the chamfer 160 can guide the elastic member 130 to bend, thereby reducing the difficulty of inserting the magnet 120 and improving the assembly efficiency of the rotor 100.

[0175] Optionally, the chamfer 160 includes a straight chamfer or a round chamfer.

[0176] Optionally, when the chamfer 160 includes a round chamfer, the dimension R of the chamfer 160 is ≥ 0.25 mm.

[0177] In some embodiments, optionally, an angle β between at least a portion of at least one elastic member 130 and a horizontal plane where the rotor punching 112 is located satisfies β≤45°.

[0178] In this embodiment, the angle between the elastic member 130 and the horizontal plane where the rotor punching sheet 112 is located is limited to be less than or equal to 45°, that is, the free end of the elastic member 130 is bent and extended in the slot 111 in the insertion direction of the magnet 120, thereby facilitating the insertion of the magnet 120 and further improving the assembly efficiency of the rotor 100.

[0179] Moreover, due to the provision of the elastic member 130, during the process of inserting the magnet 120 into the slot 111, the magnet 120 and the elastic member 130 are abutted against each other, that is, the elastic member 130 is squeezed to cause the elastic member 130 to deform, and the magnet 120 is firmly fixed in the slot 111 by utilizing the deformation elastic force of the elastic member 130. That is to say, during the process of inserting the magnet 120, the magnet 120 can be fixed in the slot 111, which is simple to assemble, effectively reduces the difficulty of assembly, improves production efficiency, and reduces the production cost of the rotor 100.

[0180] Compared with the related technologies that use integral rotor injection molding / potting, adhesive glue between the magnet and the magnet slot, end plates at both ends of the rotor axis, or expansion materials in the magnet slot to fix the magnet to the magnet slot, it can simplify the production process of the motor, reduce motor parts, and thus reduce the production cost of the motor. At the same time, in the long-term environment of refrigerant and lubricant, it avoids compatibility issues with glue, plastic, etc., ensures motor performance, and improves the stability and reliability of the motor during operation.

[0181] In some embodiments, optionally, when a plurality of magnets 120 are respectively inserted into a plurality of slots 111 , there is a gap between at least one magnet 120 and an inner wall of the slot 111 where the magnet 120 is located.

[0182] In this embodiment, when multiple magnets 120 are respectively inserted into multiple slots 111, there is a gap between at least one magnet 120 and the inner wall of the slot 111 where it is located, that is, there is a gap fit between at least one magnet 120 and the inner wall of the slot 111 where it is located, thereby reducing the difficulty of inserting the magnet 120 and improving the assembly efficiency of the rotor 100.

[0183] Since at least one slot 111 has an elastic member 130, when multiple magnets 120 are respectively inserted into the multiple slots 111, the magnet 120 in the slot 111 having the elastic member 130 abuts against the elastic member 130 in the slot 111 to fix at least one magnet 120, thereby ensuring a clearance fit between the magnet 120 and the slot wall of the slot 111 in which it is located, while ensuring the fixing effect of the magnet 120 in the slot 111, preventing the magnet 120 from shaking, and enhancing the stability of the magnet 120, thereby reducing the noise of the motor having the rotor 100 during operation, thereby ensuring the motor performance and reliability.

[0184] Moreover, it can be understood that, during the process of inserting the magnet 120 into the slot 111, the magnet 120 is abutted against the elastic member 130, that is, the elastic member 130 is squeezed to cause the elastic member 130 to deform, and the magnet 120 is firmly fixed in the slot 111 by utilizing the deformation elastic force of the elastic member 130. That is to say, during the process of inserting the magnet 120, the magnet 120 can be fixed in the slot 111, which is simple to assemble, effectively reduces the difficulty of assembly, improves production efficiency, and reduces the production cost of the rotor 100.

[0185] Compared with the related technologies that use integral rotor injection molding / potting, adhesive glue between the magnet and the magnet slot, end plates at both ends of the rotor axis, or expansion materials in the magnet slot to fix the magnet to the magnet slot, it can simplify the production process of the motor, reduce motor parts, and thus reduce the production cost of the motor. At the same time, in the long-term environment of refrigerant and lubricant, it avoids compatibility issues with glue, plastic, etc., ensures motor performance, and improves the stability and reliability of the motor during operation.

[0186] Optionally, each magnet 120 is gap-matched with an inner wall of the slot 111 where the magnet 120 is located.

[0187] According to a second aspect of the present invention, there is provided a motor, comprising a rotor 100 as provided in any of the above embodiments, and thus having all the beneficial technical effects of the rotor 100, which will not be described in detail herein.

[0188] Optionally, the electric motor comprises an inner rotor electric motor.

[0189] The rotor 100 includes a rotor core 110 and a plurality of magnets 120. Specifically, the rotor core 110 includes a plurality of rotor punchings 112. Specifically, the plurality of rotor punchings 112 are stacked in the axial direction of the rotor core 110. Specifically, the plurality of rotor punchings 112 can be stacked in sequence from bottom to top in the axial direction, or can be stacked in sequence from top to bottom in the axial direction. The specific arrangement can be made according to actual needs.

[0190] Each rotor punching sheet 112 is provided with a plurality of magnet slots 113 , and the plurality of magnet slots 113 are arranged along the circumferential direction of the rotor core 110 . The plurality of magnet slots 113 axially opposite to each other of the plurality of rotor punching sheets 112 are connected to form a slot 111 .

[0191] The plurality of rotor punching sheets 112 include a plurality of first punching sheets 114. It is understood that the plurality of first punching sheets 114 have the same shape and size. Each first punching sheet 114 is provided with at least one elastic member 130, and at least one elastic member 130 is located in at least one magnet slot 113, so that at least one slot 111 has a plurality of elastic members 130.

[0192] When multiple magnets 120 are respectively inserted into multiple slots 111, the magnet 120 in the slot 111 having the elastic member 130 is abutted against the elastic member 130 in the slot 111 to fix at least one magnet 120, thereby ensuring the clearance fit between the magnet 120 and the slot wall of the slot 111 in which it is located, while ensuring the fixing effect of the magnet 120 in the slot 111, preventing the magnet 120 from shaking, enhancing the stability of the magnet 120, and further reducing the noise of the motor having the rotor 100 during operation, thereby ensuring the motor performance and reliability.

[0193] Moreover, it can be understood that, during the process of inserting the magnet 120 into the slot 111, the magnet 120 is abutted against the elastic member 130, that is, the elastic member 130 is squeezed to cause the elastic member 130 to deform, and the magnet 120 is firmly fixed in the slot 111 by utilizing the deformation elastic force of the elastic member 130. That is to say, during the process of inserting the magnet 120, the magnet 120 can be fixed in the slot 111, which is simple to assemble, effectively reduces the difficulty of assembly, improves production efficiency, and reduces the production cost of the rotor 100.

[0194] Compared with the related technologies that use integral rotor injection molding / potting, adhesive glue between the magnet and the magnet slot, end plates at both ends of the rotor axis, or expansion materials in the magnet slot to fix the magnet to the magnet slot, it can simplify the production process of the motor, reduce motor parts, and thus reduce the production cost of the motor. At the same time, in the long-term environment of refrigerant and lubricant, it avoids compatibility issues with glue, plastic, etc., ensures motor performance, and improves the stability and reliability of the motor during operation.

[0195] According to a third aspect of the present invention, a compressor is provided, comprising a rotor 100 or a motor as provided in any of the above embodiments, thereby having all the beneficial technical effects of the rotor 100 or the motor, which will not be repeated here.

[0196] Optionally, the compressor comprises a variable frequency compressor.

[0197] According to a fourth aspect of the present invention, there is provided a refrigeration device, comprising a compressor as provided in any of the above embodiments, and thus having all the beneficial technical effects of the compressor, which will not be described in detail herein.

[0198] Optionally, the refrigeration device includes a refrigerator or an air conditioner.

[0199] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0200] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0201] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotor, characterized in that: include: A rotor core, the rotor core comprising a plurality of rotor punchings, the plurality of rotor punchings being stacked along the axial direction of the rotor core, each of the rotor punchings being provided with a plurality of magnet slots, the plurality of magnet slots being arranged at intervals along the circumferential direction of the rotor core, the plurality of magnet slots being opposite along the axial direction of the rotor core being connected to form a slot, the plurality of rotor punchings comprising a plurality of first punchings, each of the first punchings being provided with at least one elastic member, and at least one of the elastic members being located in at least one of the magnet slots; A plurality of magnets are respectively disposed in the plurality of slots, and at least one of the magnets abuts against at least one of the elastic members in the slot where the magnet is located.

2. The rotor according to claim 1, characterized in that The number of the elastic members is at least two; At least two of the elastic members are located in one of the magnet slots; or at least two of the elastic members are located in different magnet slots, respectively.

3. The rotor according to claim 2, characterized in that At least two of the elastic members extend in different directions in at least one of the magnet slots.

4. The rotor according to claim 2, characterized in that At least one of the elastic members extends in the radial direction of the rotor core in at least one of the magnet slots; and / or At least one of the elastic members extends in at least one of the magnet slots along the circumferential direction of the rotor core.

5. The rotor according to claim 1, characterized in that Each of the first punching sheets is provided with one of the elastic members; When the plurality of rotor punches are stacked axially along the rotor core, at least one of the plurality of first punches is rotated by a preset angle relative to the remaining first punches in the plurality of first punches so that the elastic members on at least two of the first punches are distributed in different slots.

6. The rotor according to claim 1, characterized in that An interference length L between at least one of the magnets and at least one of the elastic members in the slot where the magnet is located satisfies 0.05 mm ≤ L ≤ 0.2 mm.

7. The rotor according to any one of claims 1 to 6, characterized in that The rotor core further comprises: At least one avoidance groove is provided on at least one of the rotor punching sheets. In at least two adjacent rotor punching sheets, at least one of the avoidance grooves is opposite to at least one of the elastic members along the axial direction of the rotor core.

8. The rotor according to any one of claims 1 to 6, characterized in that On each of the first punching sheets and in at least one of the magnet slots, the number m of the elastic members extending along the circumferential direction of the rotor core and the number n of the magnet slots satisfy 1≤m≤2 / n; and / or On each of the first punching sheets and in at least one of the magnet slots, the number z of the elastic members extending in the radial direction of the rotor core and the number n of the magnet slots satisfy 1≤z≤2 / n.

9. The rotor according to any one of claims 1 to 6, characterized in that Each of the first punching sheets is further provided with a mounting groove, the mounting groove is communicated with the magnet groove, the first end of the elastic member is located in the mounting groove, and the second end of the elastic member is located in the magnet groove.

10. The rotor according to any one of claims 1 to 6, characterized in that At least one of the elastic members is located radially inside the magnet; At least one of the rotor sheets is further provided with an external magnetic bridge, and the external magnetic bridge is located radially outside the magnet.

11. The rotor according to claim 10, characterized in that The outer magnetic bridge is provided with an opening, and the opening is communicated with the magnet slot.

12. The rotor according to claim 10, characterized in that The plurality of rotor punching sheets further include a second punching sheet, and along the axial direction of the rotor core, the second punching sheet is located at the end of the plurality of first punching sheets; Wherein, the second punching sheet is provided with the external magnetic bridge.

13. A rotor according to any one of claims 1 to 6, characterized in that Along the axial direction of the rotor core, at least one end of the magnet is provided with a chamfer.

14. A rotor according to any one of claims 1 to 6, characterized in that An angle β formed between at least a portion of at least one of the elastic members and a horizontal plane where the rotor punching is located satisfies β≤45°.

15. A rotor according to any one of claims 1 to 6, characterized in that When the plurality of magnets are respectively inserted into the plurality of slots, a gap is provided between at least one of the magnets and an inner wall of the slot where the magnet is located.

16. A motor, characterized in that: Comprising a rotor as claimed in any one of claims 1 to 15.

17. A compressor, characterized in that: include: A rotor as claimed in any one of claims 1 to 15; or The electric machine as claimed in claim 16.

18. A refrigeration device, characterized in that: Comprising the compressor of claim 17.

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