Rotor punching sheet, rotor, motor, compressor and refrigeration equipment

Abstract

The utility model discloses a rotor punching sheet, a rotor, a motor, a compressor and refrigeration equipment, and relates to the technical field of motors, the rotor punching sheet is provided with a plurality of magnetic steel grooves distributed along the circumferential direction, the middle part of the rotor punching sheet is provided with a shaft hole, and a plurality of through-flow holes are distributed along the circumferential direction of the rotor punching sheet between the shaft hole and the magnetic steel grooves. And at least part of the magnetic steel grooves are communicated with the through-flow holes and / or the shaft hole to form a passage. The technical scheme provided by the utility model aims to reduce the iron loss of the motor, reduce the magnetic flux leakage of the rotor and improve the efficiency of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a rotor punching sheet, a rotor, a motor, a compressor and a refrigeration device. Background Art

[0002] In the field of refrigeration devices, the motor is a core component, and the performance of the motor affects the energy efficiency and service life of the refrigeration device. For a motor, the armature reaction magnetic field will have a certain impact on the performance of the motor, such as increasing the iron loss of the motor, thereby reducing the efficiency of the motor.

[0003] Generally speaking, in order to improve the motor efficiency, usually the armature reaction magnetic field is suppressed by changing the rotor structure or stator structure of the motor to improve the motor efficiency. However, this modification method has limited suppression of the armature reaction magnetic field and requires a large modification to the structure of the motor, which not only increases the manufacturing cost of the motor but also easily affects other performances of the motor. Summary of the Utility Model

[0004] The main object of the utility model is to provide a rotor punching sheet, a rotor, a motor, a compressor and a refrigeration device, aiming to reduce the iron loss of the motor, reduce the rotor magnetic leakage and improve the motor efficiency.

[0005] To achieve the above object, the rotor punching sheet of the utility model is provided with a plurality of magnet slots distributed circumferentially, and a shaft hole is provided in the middle of the rotor punching sheet. Between the shaft hole and the magnet slots, the rotor punching sheet is circumferentially provided with a plurality of through holes, and at least part of the magnet slots communicate with the through holes and / or the shaft hole to form a passage.

[0006] In one embodiment, the minimum width of the passage in the circumferential direction of the rotor punching sheet is d, satisfying: 0.35mm ≤ d ≤ 0.8mm.

[0007] In one embodiment, the number of the magnet slots is 2P, the number of the passages communicating with the shaft hole is P or 2P, and they are evenly distributed along the circumferential direction of the rotor punching sheet.

[0008] In one embodiment, the passage extends radially along the rotor punching sheet.

[0009] In one embodiment, at least one passage is arranged between any magnet slot and the shaft hole.

[0010] In one embodiment, an interpolar air slot is provided between two adjacent magnet slots in the circumferential direction of the rotor punching sheet.

[0011] The utility model also provides a rotor, which includes a plurality of the aforementioned rotor punching sheets, and the plurality of rotor punching sheets are stacked to form a rotor core.

[0012] In one embodiment, the rotor punching includes a first rotor punching having P passages communicating with the shaft hole, and further includes a second rotor punching having 2P passages communicating with the shaft hole;

[0013] A plurality of the first rotor punchings are stacked to form an end portion of the rotor core, with a thickness of N1, and a plurality of the second rotor punchings are stacked to form a middle portion of the rotor core, with a thickness of N2, satisfying: 0.5 ≤ N2 / N1 ≤ 8.

[0014] In one embodiment, the rotor punching includes a first rotor punching having P passages communicating with the shaft hole, and further includes a second rotor punching having 2P passages communicating with the shaft hole;

[0015] The first rotor punching and the second rotor punching are alternately stacked, and the first rotor punching is located at an end portion of the rotor core.

[0016] In one embodiment, the rotor punching includes a third rotor punching having passages only disposed between the magnet slots and the current-carrying holes, and further includes a second rotor punching having 2P passages communicating with the shaft hole;

[0017] A plurality of the third rotor punchings are stacked to form an end portion of the rotor core, with a thickness of N1, and a plurality of the second rotor punchings are stacked to form a middle portion of the rotor core, with a thickness of N2, satisfying: 0.5 ≤ N2 / N1 ≤ 8.

[0018] In one embodiment, the rotor punching includes a third rotor punching having passages only disposed between the magnet slots and the current-carrying holes, and further includes a second rotor punching having 2P passages communicating with the shaft hole;

[0019] The second rotor punching and the third rotor punching are alternately stacked, and the third rotor punching is located at an end portion of the rotor core.

[0020] The present utility model further provides a motor, and the motor includes the rotor as described above.

[0021] The present utility model further provides a compressor, and the compressor includes the rotor as described above.

[0022] The present utility model further provides a refrigeration device, and the refrigeration device includes the motor as described above, or includes the compressor as described above.

[0023] The technical solution of the present utility model sets a passage between the magnet steel groove and the shaft hole. The passage is at least connected to at least one of the areas between the magnet steel groove and the current-carrying hole and between the current-carrying hole and the shaft hole. By utilizing the property of the passage having a relatively large magnetic resistance, the magnetic flux direction formed by the magnetic poles corresponding to the magnet steel groove is adjusted, that is, the magnetic field distribution between the rotor and the stator is optimized, the iron loss of the motor is reduced, and the magnetic leakage of the rotor is suppressed through the passage, thereby improving the efficiency of the motor. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0025] Figure 1 Structural schematic diagram of an embodiment of the rotor punching sheet provided by the present utility model;

[0026] Figure 2 Structural schematic diagram of another embodiment of the rotor punching sheet provided by the present utility model;

[0027] Figure 3 Structural schematic diagram of yet another embodiment of the rotor punching sheet provided by the present utility model;

[0028] Figure 4 Structural schematic diagram of an embodiment of the rotor provided by the present utility model;

[0029] Figure 5 Structural schematic diagram of another embodiment of the rotor provided by the present utility model;

[0030] Figure 6 Structural schematic diagram of yet another embodiment of the rotor provided by the present utility model;

[0031] Figure 7 Structural schematic diagram of still another embodiment of the rotor provided by the present utility model;

[0032] Figure 8 Comparison diagram of the efficiency increase of the motor provided by the present utility model.

[0033] Explanation of the reference numerals in the drawings:

[0034] 100. Rotor punching sheet; 101. First rotor punching sheet; 102. Second rotor punching sheet; 103. Third rotor punching sheet; 110. Magnet steel groove; 120. Inter-pole air groove; 130. Shaft hole; 140. Current-carrying hole; 150. Passage.

[0035] The realization, functional features and advantages of the present utility model will be further described in conjunction with embodiments with reference to the accompanying drawings. Detailed implementation manners

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0037] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] In the related art, technicians usually suppress the armature reaction magnetic field by changing the winding, rotor structure or stator structure, so as to improve the motor efficiency. However, the modifications to the rotor structure and stator structure are relatively large, and the suppression of the armature reaction magnetic field is limited. For example, changing the shape distribution of the magnetic steel slots, the shape control and connection conditions between the rotor punching sheet and the air gap, or adding a compensating winding to generate a magnetic field opposite to the armature reaction magnetic field, thereby weakening or eliminating the influence of the armature reaction. However, this modification method has a relatively large impact on the motor, increasing the manufacturing cost of the motor, and the relatively large modification will also affect other performances of the motor, and ultimately the improvement range of the motor efficiency is relatively low.

[0040] The present utility model proposes a rotor punching sheet 100.

[0041] Please refer toFigures 1 to 3 , in an embodiment of the present utility model, the rotor punching sheet 100 is provided with a plurality of magnet slots 110 distributed circumferentially. A shaft hole 130 is provided in the middle of the rotor punching sheet 100. Between the shaft hole 130 and the magnet slots 110, the rotor punching sheet 100 is provided with a plurality of through holes 140 distributed circumferentially. At least part of the magnet slots 110 communicate with the through holes 140 and / or the shaft hole 130 to form a passage 150.

[0042] The technical solution of the present utility model sets a passage 150 between the magnet slot 110 and the shaft hole 130. The passage 150 communicates at least one of the magnet slot 110 and the through hole 140 and the through hole 140 and the shaft hole 130. By using the property of the larger magnetic resistance of the passage 150, the magnetic flux direction formed by the magnetic poles corresponding to the magnet slots 110 is adjusted, that is, the magnetic field distribution between the rotor and the stator is optimized, the iron loss of the motor is reduced, and the magnetic leakage of the rotor is suppressed through the passage 150, thereby improving the efficiency of the motor.

[0043] Compared with the prior art, which makes changes to the magnet slots 110 of the rotor structure or the distribution of the stator windings, this solution only needs to open a passage 150 on the rotor punching sheet 100, with less modification to the rotor structure, so the manufacturing cost of the motor is also lower. By setting the passage 150, the magnetic circuit distribution in the motor is optimized, thereby improving the motor efficiency. Among them, the passage 150 can extend radially along the rotor punching sheet 100, or extend in an arc or a broken line to connect the shaft hole 130, the through hole 140 or the magnet slot 110 in the same radial direction. For the number of the through holes 140 and the magnet slots 110, the two can be equal. In the case where the two are equal, any passage 150 can communicate with the through hole 140. When the number of the through holes 140 and the magnet slots 110 is not equal, some of the magnet slots 110 can be directly connected to the shaft hole 130, and some of the magnet slots 110 can be first connected to the through hole 140 and then connected to the magnet slot 110.

[0044] Specifically, at least part of the magnet slots 110 communicate with the current-carrying holes 140 and / or the shaft holes 130 to form a passage 150. It is understood that part of the magnet slots 110 can only communicate with the current-carrying holes 140, and the communicated current-carrying holes 140 no longer communicate with the shaft holes 130. Part of the magnet slots 110 can also communicate with the current-carrying holes 140, and the communicated current-carrying holes 140 also communicate with the shaft holes 130 through the passage 150. Of course, it is also possible that part of the magnet slots 110 do not communicate with the current-carrying holes 140 and the shaft holes 130, and there is only a situation where a passage 150 is formed between the current-carrying holes 140 and the shaft holes 130, forming various permutations and combinations of the passage 150 among the magnet slots 110, the current-carrying holes 140, and the shaft holes 130. That is to say, outside the original channels for the circulation of the refrigeration oil and the refrigerant, the current-carrying holes 140 can also be used as part of the magnetic resistance increasing passage 150. Or, the current-carrying holes 140 are not used as part of the passage 150 for separating the magnetic circuit to optimize the magnetic flux distribution, and a passage 150 is separately opened to connect the shaft holes 130 and the magnet slots 110.

[0045] It can be understood that for the passage 150 between a magnet slot 110 and a shaft hole 130 or a current-carrying hole 140, or between a current-carrying hole 140 and a shaft hole 130, the passage 150 can be configured as multiple parallel segments or as a single separate segment. For the case where multiple parallel passages 150 are provided between a magnet slot 110 and a shaft hole 130 or a current-carrying hole 140, it can be that a magnet slot 110 has only multiple parallel passages 150 connecting to a shaft hole 130 or a current-carrying hole 140, or a magnet slot 110 has only multiple passages 150 connecting to multiple current-carrying holes 140, or a magnet slot 110 has a passage 150 directly connecting to the shaft hole 130 and also has a passage 150 directly connecting to the current-carrying hole 140. In this embodiment, as Figures 1 to 3 shown, generally, a passage 150 is configured between the shaft hole 130, the current-carrying hole 140, and the magnet slot 110 in the same radial direction, and the rotor punching sheet 100 is ensured to have a symmetric structure to ensure the stability of the center of gravity of the rotor and the stability of rotation.

[0046] In one embodiment, please refer to Figures 1 to 3, the minimum width of the passage 150 in the circumferential direction of the rotor punching sheet 100 is d, satisfying: 0.35 mm ≤ d ≤ 0.8 mm. It can be understood that the width defined by d is the width at the minimum of the multiple passages 150. Under this condition, limiting the minimum width to be greater than or equal to 0.35 mm ensures the function of the passage 150 in isolating the magnetic flux and optimizing the magnetic flux distribution. Limiting the minimum width to be less than or equal to 0.8 mm avoids the width of the passage 150 being too large and reducing the strength of the rotor punching sheet 100, thereby ensuring the structural stability of the rotor and further ensuring the reliability of the output power of the motor. Specifically, in this embodiment, the size of d can be 0.35 mm, 0.5 mm, 0.65 mm or 0.8 mm. Of course, in other embodiments, for other specifications of the rotor punching sheet 100, the minimum width of the passage 150 can also be 1 mm or 0.9 mm, etc.

[0047] In one embodiment, please refer to Figures 1 to 3 , the number of the magnetic steel grooves 110 is 2P, the number of the passages 150 communicating with the shaft hole 130 is P or 2P, and they are evenly distributed along the circumferential direction of the rotor punching sheet 100. It can be understood that the number of poles of the rotor is 2P. When the number of the passages 150 communicating with the shaft hole 130 is 2P, corresponding to each magnetic pole, there is one passage 150, so that the magnetic flux distribution area of each magnetic pole is the same, making the magnetic flux of the motor evenly distributed, reducing the iron loss of the motor and the magnetic leakage of the rotor. Among them, the 2P passages 150 only require the part communicating with the shaft hole 130. Generally speaking, to ensure the function of the passage 150 in adjusting the magnetic flux distribution, the passage 150 usually passes through the through-flow hole 140 and then communicates with the shaft hole 130 and the magnetic steel groove 110 at both ends respectively. That is, the 2P passages 150 can be from the shaft hole 130 passing through the through-flow hole 140 and then communicating with the corresponding magnetic steel groove 110, or only communicating between the shaft hole 130 and the corresponding through-flow hole 140. Between the through-flow hole 140 and the magnetic steel groove 110, the passage 150 may or may not be formed. Similarly, when the number of the passages 150 communicating with the shaft hole 130 is P, corresponding to multiple magnetic poles, one passage 150 is alternately arranged at the shaft hole 130 at intervals, also ensuring the even distribution of the magnetic flux of the motor, reducing the iron loss of the motor and the magnetic leakage of the rotor. Among them, the P passages 150 only require the part communicating with the shaft hole 130. Between the through-flow hole 140 and the magnetic steel groove 110, the passages 150 can be 2P or P or 0. Generally speaking, 2P passages 150 are arranged between the through-flow hole 140 and the magnetic steel groove 110 to ensure the function of the passage 150 in adjusting the magnetic flux distribution. In this way, the fewer the passages 150 communicating with the shaft hole 130, the better the structural strength of the rotor punching sheet 100. Setting the number of the passages 150 communicating with the shaft hole 130 to be P or 2P can achieve a balance between improving the motor efficiency and ensuring the rotor strength, so as to flexibly adapt to the use environment of the motor and ensure the applicability of the motor after improving the efficiency.

[0048] In one embodiment, please refer to Figures 1 to 3 , the passage 150 extends radially along the rotor punching 100. It can be understood that the passage 150 is straight, and its two circumferential sides are arranged in parallel, thus reducing the manufacturing difficulty of the rotor punching 100 and improving the yield rate of the rotor punching 100. Moreover, the straight-extending passage 150 ensures that the rotor punching 100 has a symmetric structure, avoiding the situation of eccentric rotation of the rotor or unstable power output. Of course, in other embodiments, the passage 150 can also extend in an arc or a broken line.

[0049] For any radial direction of the distribution of the shaft hole 130 and the magnet slots 110, at least one passage 150 is arranged, which can ensure the separation and guiding effects of the passage 150 on the magnetic flux distribution, ensure the uniform distribution of the magnetic flux in the motor, and improve the motor efficiency. On this basis, the minimum width d of the passage 150 is the minimum width among the passages 150 with smaller widths among the multiple passages 150. Generally speaking, only one passage 150 is arranged in any radial direction of the distribution of the shaft hole 130 and the magnet slots 110.

[0050] In one embodiment, please refer to Figures 1 to 3 , on the circumference of the rotor punching 100, an interpolar air slot 120 is arranged between two adjacent magnet slots 110. The interpolar air slot 120 increases the magnetic resistance between the two adjacent magnet slots 110, shunts the magnetic flux at this place, and then adjusts the magnetic flux distribution to suppress the armature reaction magnetic field, thereby improving the efficiency of the motor. Specifically, in this embodiment, the magnet slot 110 is V-shaped, the passage 150 communicates with the corner of the magnet slot 110, and the interpolar air slot 120 is trapezoidally distributed between two adjacent magnet slots 110.

[0051] The present utility model also proposes a rotor, which includes a rotor punching 100. The specific structure of the rotor punching 100 refers to the above embodiments. Since this rotor adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, a plurality of rotor punchings 100 are stacked to form a rotor core, and the magnets are axially installed in the magnet slots 110 along the rotor core.

[0052] In one embodiment, please refer to Figure 1 , Figure 2 and 4, the rotor punching sheet 100 includes a first rotor punching sheet 101 having a passage 150 with P communicating shaft holes 130, and also includes a second rotor punching sheet 102 having a passage 150 with 2P communicating shaft holes 130. A plurality of first rotor punching sheets 101 are stacked to form the end of the rotor core, with a thickness of N1, and a plurality of second rotor punching sheets 102 are stacked to form the middle of the rotor core, with a thickness of N2, satisfying: 0.5 ≤ N2 / N1 ≤ 8. According to the description of the above embodiment, the number of magnetic poles of the rotor is 2P. The first rotor punching sheet 101 with a passage 150 having P communicating shaft holes 130 has better structural strength, and the second rotor punching sheet 102 with a passage 150 having 2P communicating shaft holes 130 has a better effect of separating and guiding the magnetic flux. Setting the first rotor punching sheet 101 at the end of the rotor core can relatively well ensure the strength of the rotor punching sheet 100 and improve the efficiency of the motor. On this basis, limiting N2 / N1 to be between 0.5 and 8 enables the number of second rotor punching sheets 102 to occupy at least half of all the rotor punching sheets 100 of the rotor core, improving the efficiency of the rotor core while ensuring the structural strength of the rotor core. Specifically, as Figure 8 shown, at a rotational speed of 1800 rpm (Revolutions Per Minute, revolutions per minute), in the existing technology with a passage 150 provided, the efficiency of the motor is 92.4%, and the efficiency of the motor in this embodiment is 92.85%. At a rotational speed of 3600 rpm (Revolutions Per Minute, revolutions per minute), in the existing technology with a passage 150 provided, the efficiency of the motor is 94.61%, and the efficiency of the motor in this embodiment is 94.81%, and the efficiency is improved in both cases.

[0053] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 5 , the rotor punching sheet 100 includes a first rotor punching sheet 101 having a passage 150 with P communicating shaft holes 130, and also includes a second rotor punching sheet 102 having a passage 150 with 2P communicating shaft holes 130. The first rotor punching sheet 101 and the second rotor punching sheet 102 are alternately stacked, and the first rotor punching sheet 101 is located at the end of the rotor core. It can be understood that the number of poles of the rotor is 2P. The first rotor punching sheet 101 with a passage 150 having P communicating shaft holes 130 has better structural strength, and the second rotor punching sheet 102 with a passage 150 having 2P communicating shaft holes 130 has a better effect of separating and guiding the magnetic flux, that is, it has a promoting effect on the efficiency of the motor. Alternately stacking the first rotor punching sheet 101 and the second rotor punching sheet 102 ensures the uniformity of the structural strength of the rotor core, and also improves the motor efficiency by ensuring the setting of the passage 150. Among them, the first rotor punching sheet 101 is at the axial two ends of the rotor core, ensuring the structural stability of the end of the rotor core.

[0054] In another embodiment, please refer to Figure 2 , Figure 3 and Figure 6 , the rotor punching 100 includes a third rotor punching 103 that only sets a passage 150 between the magnet slots 110 and the current-carrying holes 140, and also includes a second rotor punching 102 having a passage 150 with 2P communicating shaft holes 130. A plurality of third rotor punchings 103 are stacked to form the end of the rotor core, with a thickness of N1, and a plurality of second rotor punchings 102 are stacked to form the middle of the rotor core, with a thickness of N2, satisfying: 0.5 ≤ N2 / N1 ≤ 8. According to the description of the above embodiment, the magnetic pole of the rotor is 2P. The third rotor punching 103 with a passage 150 having 0 communicating shaft holes 130 has better structural strength, and the second rotor punching 102 with a passage 150 having 2P communicating shaft holes 130 has a better effect on separating and guiding magnetic flux. Setting the third rotor punching 103 at the end of the rotor core can relatively well ensure the strength of the rotor punching 100 and improve the efficiency of the motor. On this basis, limiting N2 / N1 to be between 0.5 and 8 enables the number of second rotor punchings 102 to occupy at least half of all the rotor punchings 100 of the rotor core, improving the efficiency of the rotor core while ensuring the structural strength of the rotor core.

[0055] In yet another embodiment, please refer to Figure 2 , Figure 3 and Figure 7 , the rotor punching 100 includes a third rotor punching 103 that only sets a passage 150 between the magnet slots 110 and the current-carrying holes 140, and also includes a second rotor punching 102 having a passage 150 with 2P communicating shaft holes 130. The second rotor punchings 102 and the third rotor punchings 103 are alternately stacked, and the third rotor punchings 103 are located at the ends of the rotor core. Referring to the description of the above embodiment, the magnetic pole of the rotor is 2P. The third rotor punching 103 with a passage 150 having 0 communicating shaft holes 130 has better structural strength, and the second rotor punching 102 with a passage 150 having 2P communicating shaft holes 130 has a better effect on separating and guiding magnetic flux, that is, it has a promoting effect on the efficiency of the motor. Alternately stacking the third rotor punchings 103 and the second rotor punchings 102 ensures the uniformity of the structural strength of the rotor core and also improves the motor efficiency by ensuring the setting of the passage 150. Among them, the third rotor punchings 103 are at the axial two ends of the rotor core, ensuring the structural stability of the ends of the rotor core.

[0056] For the above-mentioned first rotor punching sheet 101, second rotor punching sheet 102, and third rotor punching sheet 103, the number of passages 150 between the magnet slots 110 and the current-carrying holes 140 can be 2P or P, and they are usually evenly distributed in the circumferential direction of the rotor punching sheet 100. For the third rotor punching sheet 103, at least one passage 150 needs to be provided between the magnet slots 110 and the current-carrying holes 140. For the first rotor punching sheet 101 and the second rotor punching sheet 102, the passage 150 may or may not be provided between the magnet slots 110 and the current-carrying holes 140. In this embodiment, 2P passages 150 are provided between the magnet slots 110 and the current-carrying holes 140 on any rotor punching sheet 100, and they are evenly distributed in the circumferential direction of the rotor punching sheet 100.

[0057] The present utility model also provides a motor, which includes a rotor. The specific structure of the rotor refers to the above-mentioned embodiment. Since this motor adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated one by one here. Among them, the rotor rotatably passes through the central hole of the stator.

[0058] The present utility model also provides a compressor, which includes a rotor. The specific structure of the rotor refers to the above-mentioned embodiment. Since this compressor adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated one by one here. Among them, the rotor rotatably passes through the central hole of the stator, the outer periphery of the stator is fixed to the compressor housing, and the refrigerating oil and refrigerant in the compressor directly pass through the current-carrying holes 140 of the rotor punching sheet 100 to realize energy circulation; or, the outer periphery of the stator is fixed to the motor housing, and then the motor is installed in the compressor housing.

[0059] The present utility model also provides a refrigeration device, which includes a motor or a compressor. The specific structure of the motor or the compressor refers to the above-mentioned embodiment. Since this refrigeration device adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated one by one here.

[0060] The above description is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A rotor punching, characterized in that: The rotor punching is provided with a plurality of magnetic steel slots distributed along the circumferential direction, an axial hole is provided in the middle of the rotor punching, and a plurality of flow holes are distributed along the circumferential direction between the axial hole and the magnetic steel slots, and at least some of the magnetic steel slots are connected with the flow holes and / or the axial hole to form a passage.

2. The rotor punching according to claim 1, characterized in that: The minimum width of the passage in the circumferential direction of the rotor punching sheet is d, which satisfies: 0.35 mm ≤ d ≤ 0.8 mm.

3. The rotor punching according to claim 1, characterized in that: The number of the magnetic steel slots is 2P, the number of the passages connected to the shaft hole is P or 2P, and they are evenly distributed along the circumference of the rotor punching sheet.

4. The rotor punching according to claim 1, characterized in that: The passage extends in the radial direction of the rotor punching sheet; And / or, at least one passage is arranged between any one of the magnetic steel slots and the axial hole.

5. The rotor punching according to any one of claims 1 to 4, characterized in that An interpolar air slot is provided between two adjacent magnetic steel slots in the circumferential direction of the rotor punching sheet.

6. A rotor, characterized in that: The invention comprises a plurality of rotor punching sheets according to any one of claims 1 to 5, wherein the plurality of rotor punching sheets are stacked to form a rotor core.

7. The rotor according to claim 6, characterized in that The rotor punching includes a first rotor punching having P passages connected to the shaft hole, and also includes a second rotor punching having 2P passages connected to the shaft hole; A plurality of the first rotor punching sheets are stacked to form the end of the rotor core, with a thickness of N1, and a plurality of the second rotor punching sheets are stacked to form the middle of the rotor core, with a thickness of N2, satisfying: 0.5≤N2 / N1≤8; Alternatively, the first rotor punching sheets and the second rotor punching sheets are alternately stacked, and the first rotor punching sheets are located at the ends of the rotor core.

8. The rotor according to claim 6, characterized in that The rotor punching includes a third rotor punching that only provides the passage between the magnetic steel slot and the through-flow hole, and also includes a second rotor punching that has 2P passages connected to the shaft hole; A plurality of the third rotor punching sheets are stacked to form the end of the rotor core, with a thickness of N1, and a plurality of the second rotor punching sheets are stacked to form the middle of the rotor core, with a thickness of N2, satisfying: 0.5≤N2 / N1≤8; Alternatively, the second rotor punching sheets and the third rotor punching sheets are alternately stacked, and the third rotor punching sheets are located at the ends of the rotor core.

9. A motor, characterized in that: Comprising a rotor as claimed in any one of claims 6 to 8.

10. A compressor, characterized in that: Comprising a rotor as claimed in any one of claims 6 to 8.

11. A refrigeration device, characterized in that: Comprising the motor as claimed in claim 9, or, comprising the compressor as claimed in claim 10.

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