Rotor, motor, compressor and refrigeration equipment

Abstract

The invention discloses a rotor, a motor, a compressor and refrigeration equipment, and relates to the technical field of refrigeration equipment, the rotor comprises a permanent magnet and a rotor iron core, the rotor iron core is provided with a plurality of groups of magnetic flux-flow grooves, each group of magnetic flux-flow grooves comprises two magnetic flux-flow grooves, each magnetic conduction flow groove comprises a permanent magnet groove, a communication groove and a first flow hole, the permanent magnet grooves are communicated with the first flow holes through the communication grooves, each permanent magnet groove is internally provided with at least one permanent magnet, and the two magnetic conduction flow grooves in the same group are arranged at intervals to form a magnetic bridge; the minimum width d of the magnetic bridge is larger than or equal to 0.4 mm and smaller than or equal to 3 mm. According to the technical scheme provided by the invention, the number of permanent magnets in the rotor is reduced, and the production cost of the rotor is reduced.

Description

Technical Field

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

[0002] At present, rare earth permanent magnet motors have the advantages of simple structure, reliability, high efficiency and high power density, and are widely used in air-conditioning compressors. However, the cost of rare earth permanent magnets is relatively high, and how to reduce the amount of rare earth permanent magnets is very important for improving the cost performance of air-conditioning compressor motors. Summary of the invention

[0003] The main purpose of the present invention is to provide a rotor, a motor, a compressor and a refrigeration device, aiming to reduce the amount of permanent magnets in the rotor and reduce the production cost of the rotor.

[0004] To achieve the above object, the rotor proposed in the present invention comprises: permanent magnets; and A rotor core, wherein a plurality of groups of magnetic flux flow slots are provided on the rotor core, each group of the magnetic flux flow slots includes two magnetic flux flow slots, the magnetic flux flow slots include a permanent magnet slot, a connecting slot and a first flow hole, the permanent magnet slot is connected to the first flow hole through the connecting slot, at least one permanent magnet is provided in each of the permanent magnet slots, two of the magnetic flux flow slots in the same group are spaced apart to form a magnetic bridge, the minimum width of the magnetic bridge is d, 0.4mm≤d≤3mm.

[0005] In one embodiment, the permanent magnet slots penetrate the outer periphery of the rotor core.

[0006] In one embodiment, the permanent magnet slots are not connected to the outer periphery of the rotor core.

[0007] In one embodiment, the rotor core is provided with a plurality of second flow holes, the sum of the areas of the plurality of second flow holes is S, the maximum radius of the rotor core is r, 0.04≤ ≤0.1.

[0008] In one embodiment, a magnetic isolation groove is provided on the rotor core, and the magnetic isolation groove is provided on a side of the permanent magnet slot facing the outer peripheral wall of the rotor core.

[0009] In one implementation, the length of the magnetic bridge is L, the maximum radius of the rotor core is r, and 0.05r≤L≤0.4r.

[0010] In one embodiment, the width of the connecting groove is w, and d≤w≤5d.

[0011] The present invention also provides an electric motor, comprising the rotor as described above.

[0012] The present invention also provides a compressor, comprising the motor as described above.

[0013] The present invention also provides a refrigeration device, comprising the compressor as described above.

[0014] The rotor in the technical solution of the present invention includes a permanent magnet and a rotor core. The rotor core is provided with multiple groups of magnetic flux flow slots, each group of magnetic flux flow slots includes two magnetic flux flow slots, the magnetic flux flow slots include a permanent magnet slot, a connecting slot and a first flow hole, the permanent magnet slot is connected to the first flow hole through the connecting slot, at least one permanent magnet is provided in each permanent magnet slot, and two magnetic flux flow slots in the same group of magnetic flux flow slots are arranged at intervals to form a magnetic bridge, and the minimum width of the magnetic bridge is d, 0.4mm≤d≤3mm. By arranging the magnetic bridge between the two magnetic flux flow slots in the same group, on the one hand, the structural strength of the rotor core is increased, and the production and manufacturing cost of the rotor core is reduced; at the same time, the magnetic bridge has a small cross-sectional area, resulting in an increase in magnetic resistance, thereby reducing the leakage magnetic flux passing through the magnetic bridge, and reducing the leakage magnetic flux means that more magnetic flux participates in the air gap magnetic field coupling, thereby increasing the no-load back electromotive force, thereby improving the magnetic flux utilization rate, thereby allowing the permanent magnet volume to be reduced under the same performance, thereby reducing the amount of permanent magnets, and reducing the production and manufacturing cost of the rotor. If d is less than 0.4 mm, the width of the magnetic bridge will be too small, which will greatly increase the processing accuracy and difficulty of the magnetic bridge, because the too narrow magnetic bridge will easily break the rotor core during processing, and will also reduce the strength of the rotor core. If d is greater than 3 mm, the width of the magnetic bridge will be too large, which will increase the magnetic leakage of the rotor, thereby reducing the magnetic flux utilization rate, and thus increasing the amount of permanent magnets used. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 A schematic structural diagram of a rotor embodiment provided by the present invention; Figure 2 A schematic structural diagram of another embodiment of a rotor provided by the present invention; Figure 3 A schematic structural diagram of another embodiment of a rotor provided by the present invention; Figure 4 A schematic diagram of the structure of an embodiment of a motor provided by the present invention; Figure 5 This is a schematic structural diagram of an embodiment of a compressor provided by the present invention.

[0017] Description of Figure Numbers: 1. Motor; 11. Permanent magnet; 12. Rotor core; 121. Magnetic flux flow slot; 121a. Permanent magnet slot; 121b. Connecting slot; 121c. First flow hole; 122. Magnetic bridge; 123. Second flow hole; 124. Magnetic isolation slot; 125. Rotating shaft hole; 20. Stator.

[0018] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] Reference Figures 1 to 3 The present invention provides a rotor, comprising: a permanent magnet 11; and The rotor core 12 is provided with a plurality of groups of magnetic flux flow slots 121, each group of the magnetic flux flow slots 121 includes two magnetic flux flow slots 121, the magnetic flux flow slots 121 include permanent magnet slots 121a, connecting slots 121b and first flow holes 121c, the permanent magnet slots 121a are connected with the first flow holes 121c through the connecting slots 121b, each of the permanent magnet slots 121a is provided with at least one permanent magnet 11, two magnetic flux flow slots 121 in the same group are spaced apart to form a magnetic bridge 122, the minimum width of the magnetic bridge 122 is d, 0.4mm≤d≤3mm.

[0023] The rotor in the technical solution of the present invention includes a permanent magnet 11 and a rotor core 12. The rotor core 12 is provided with a plurality of groups of magnetic flux flow slots 121. Each group of magnetic flux flow slots 121 includes two magnetic flux flow slots 121. The magnetic flux flow slots 121 include permanent magnet slots 121a, connecting slots 121b and first flow holes 121c. The permanent magnet slots 121a are connected to the first flow holes 121c through the connecting slots 121b. At least one permanent magnet 11 is provided in each permanent magnet slot 121a. The two magnetic flux flow slots 121 in the same group of magnetic flux flow slots 121 are spaced apart to form a magnetic bridge 122. The minimum width of the magnetic bridge 122 is d, and 0.4mm≤d≤3mm. By arranging a magnetic bridge 122 between two magnetic flux flow slots 121 of the same group, on the one hand, the structural strength of the rotor core 12 is increased and the production cost of the rotor core 12 is reduced; at the same time, the magnetic bridge 122 has a small cross-sectional area, which increases the magnetic resistance, thereby reducing the leakage magnetic flux through the magnetic bridge 122. Reducing the leakage magnetic flux means that more magnetic flux participates in the air gap magnetic field coupling, thereby increasing the no-load back electromotive force, thereby improving the magnetic flux utilization rate, and allowing the volume of the permanent magnet 11 to be reduced under the same performance, thereby reducing the amount of permanent magnet 11 used and reducing the production cost of the rotor.

[0024] Among them, if d is less than 0.4 mm, the width of the magnetic bridge 122 will be too small, which will greatly increase the processing accuracy and difficulty of the magnetic bridge 122, because the too narrow magnetic bridge 122 will cause the rotor core 12 to break easily during the processing, and will also reduce the strength of the rotor core 12. If d is greater than 3 mm, the width of the magnetic bridge 122 will be too large, which will increase the magnetic leakage of the rotor, thereby reducing the magnetic flux utilization rate, and further increase the amount of permanent magnets 11. There is a large range from 0.4 mm to 3 mm, which reduces the production and processing accuracy of the magnetic bridge 122, thereby reducing the production and manufacturing cost of the rotor core 12.

[0025] The measurement method of d is: select the midpoint of the side wall of the magnetic bridge 122 facing one of the first flow holes 121c as the starting point, and select the midpoint of the side wall of the magnetic bridge 122 facing another first flow hole 121c as the end point, wherein the distance between the starting point and the end point is d.

[0026] Further, the permanent magnet slot 121a is connected to the first flow hole 121c through the connecting groove 121b, wherein the first flow hole 121c is used for the circulation of the refrigerant, thereby cooling the rotor core 12, thereby reducing the temperature of the rotor core 12 during operation, thereby improving the efficiency of the motor 1. Therefore, the first flow hole 121c is connected to the permanent magnet slot 121a through the connecting groove 121b, so that the refrigerant in the first flow hole 121c can flow into the connecting groove 121b and the permanent magnet slot 121a, thereby directly cooling the permanent magnet 11, thereby reducing the temperature of the permanent magnet 11 during operation, thereby allowing the temperature of the permanent magnet 11 to always remain within a good range during the operation of the motor 1, thereby improving the efficiency of the motor 1. At the same time, the connecting groove 121b extends along the length direction of the magnetic bridge 122, thereby also increasing the path through which the refrigerant flows, thereby increasing the heat dissipation effect of the refrigerant, thereby improving the efficiency of the motor 1.

[0027] It is understandable that the material of the permanent magnet 11 is usually a rare earth material such as neodymium iron boron, aluminum nickel cobalt, ferrite and rare earth cobalt. These rare earth materials usually have high magnetic properties, can generate a strong magnetic field, and have good stability under appropriate conditions, and can maintain their magnetic properties for a long time. At the same time, their magnetic parameters such as residual magnetic density, coercive force and magnetic energy product are usually high, so they are widely used in the fields of permanent magnets 11, but the price of these rare earth permanent magnets 11 is generally high, and in the production and manufacturing cost of the motor 1, the cost of the permanent magnet 11 accounts for a high proportion. Therefore, by reducing the amount of permanent magnets 11, the production and manufacturing cost of the motor 1 and the rotor can be greatly reduced.

[0028] In the first embodiment, the permanent magnet slot 121a penetrates the outer periphery of the rotor core 12. First, the through-design facilitates the installation and removal of the permanent magnet 11, reducing the complexity and cost of the manufacturing and maintenance process. Secondly, since the permanent magnet slot 121a is directly connected to the outside world, heat can be dissipated more effectively, which helps to improve the operating stability and life of the motor 1 in a high temperature environment. In addition, the through structure also helps to optimize the magnetic circuit design, making the magnetic lines of force more evenly distributed, thereby improving the efficiency and performance of the motor 1.

[0029] In the second embodiment, the permanent magnet slot 121a is not connected to the outer periphery of the rotor core 12. First, the non-connected design enhances the overall structural strength of the rotor core 12, making the rotor more stable and reliable when rotating at high speed. Secondly, this design helps to reduce magnetic leakage and improve the utilization efficiency of the permanent magnet 11, thereby improving the overall performance of the motor 1. In addition, the non-connected permanent magnet slot 121a can also reduce the impact of the external environment on the permanent magnet 11 to a certain extent, such as preventing impurities such as dust and moisture from entering the slot, thereby extending the service life of the permanent magnet 11.

[0030] Specifically, the rotor core 12 is provided with a plurality of second flow holes 123, the sum of the cross-sectional areas of the plurality of second flow holes 123 is S, the maximum radius of the rotor core 12 is r, 0.04≤ ≤0.1. By reasonably setting the ratio of the area of ​​the second flow hole 123 to the area of ​​the rotor core 12, the heat dissipation performance of the motor 1 is optimized and the weight of the rotor core 12 is reduced. >0.1, the area occupied by the second flow hole 123 will be too large, which will reduce the structural strength of the rotor core 12. As a result, when the motor 1 rotates at high speed or bears a large load, the rotor core 12 may be deformed or damaged due to insufficient strength. Secondly, too many flow holes or too large an area may interfere with the normal distribution of the magnetic circuit, causing the flow of magnetic lines of force in the rotor core 12 to become uneven. This will not only reduce the efficiency of the motor 1, but may also cause problems such as noise and vibration. If <0.04, the area of ​​the second through-hole 123 will be too small, thereby reducing the heat dissipation effect of the rotor core 12, so that during the operation of the motor 1, the heat generated may not be dissipated through the through-hole in time, causing the temperature of the motor 1 to rise, which will not only reduce the service life of the motor 1, but also may cause faults such as overheating protection. At the same time, if the area of ​​the second through-hole 123 is too small, the weight of the rotor core 12 will also increase.

[0031] Specifically, the rotor core 12 is provided with a magnetic isolation groove 124, and the magnetic isolation groove 124 is provided on the side of the permanent magnet groove 121a facing the outer peripheral wall of the rotor core 12. First, by providing the magnetic isolation groove 124, the air gap between the permanent magnets 11 can be enhanced, thereby weakening the closed magnetic flux formed between adjacent permanent magnets 11 through the inner surface of the rotor. Secondly, the use of the magnetic isolation groove 124 can effectively reduce the weight and moment of inertia of the rotor, thereby improving the acceleration ability of the motor 1; at the same time, the design of the magnetic isolation groove 124 also helps to optimize the magnetic circuit distribution, so that the flow of magnetic lines of force in the rotor core 12 is more uniform, thereby improving the efficiency and performance of the motor 1. Finally, the magnetic isolation groove 124 can also limit the leakage of the permanent magnet 11 through the magnetic flux saturation of the magnetic bridge 122. The reasonable design of the magnetic isolation groove 124 can ensure the maximum utilization of the permanent magnet 11 and avoid the performance degradation caused by excessive leakage coefficient.

[0032] Specifically, the length of the magnetic bridge 122 is L, the maximum radius of the rotor core 12 is r, and 0.05r≤L≤0.4r. It can be understood that if L<0.05r, the length of the magnetic bridge 122 is too short, thereby increasing the magnetic leakage of the rotor, thereby reducing the magnetic flux utilization rate, thereby increasing the amount of permanent magnets 11 and the production cost of the rotor. At the same time, if the length of the magnetic bridge 122 is too short, it will also increase the processing accuracy of the rotor core 12, thereby increasing the production cost of the rotor core 12. If L>0.4r, the length of the magnetic bridge 122 is too long, thereby reducing the structural strength of the rotor, so that the magnetic bridge 122 is easy to break during the high-speed operation of the motor 1, thereby reducing the service life of the rotor. Therefore, by setting 0.05r≤L≤0.4r, while reducing the magnetic leakage of the rotor and reducing the amount of permanent magnets 11, the structural strength of the rotor is also increased, thereby improving the service life of the rotor.

[0033] Among them, the measurement method of L is: select the intersection of the hole wall of the first flow hole 121c facing the center of the circle and the magnetic bridge 122 as the starting point, select the intersection of the magnetic bridge 122 and the groove wall of the permanent magnet groove 121a as the end point, and measure the distance between the starting point and the end point as L.

[0034] Further, the width of the connecting groove 121b is w, d≤w≤5d. It can be understood that when w is within the range of d to 5d, appropriately increasing the width of w can increase the flow area, reduce the airflow resistance, improve the gas flow efficiency of the compressor, and thus reduce the energy loss of the motor 1. At the same time, it can also optimize the airflow path and improve the overall performance and reliability of the compressor. If w>5d, it means that the width of the connecting groove 121b is too large, which will lead to increased magnetic resistance and increased magnetic flux leakage, thereby reducing the efficiency and torque output of the motor 1; at the same time, the too wide connecting groove 121b will reduce the mechanical strength of the rotor core 12, especially when rotating at high speed, it is easy to cause stress concentration and increase the risk of fracture. The slot near the magnetic bridge 122 that is too wide may interfere with the magnetic flux path, cause magnetic field distortion, and affect the running stability of the motor 1. If w<d, it means that the width of the connecting groove 121b is too small at this time, which will lead to insufficient flow area of ​​the connecting groove 121b, thereby increasing the airflow resistance, thereby reducing the efficiency of the compressor, and increasing the probability of causing local overheating or pressure loss. At the same time, the narrow connecting groove 121b requires extremely high processing accuracy, and it is easy to cause the connecting groove 121b to be incomplete or burred due to process errors, thereby affecting the dynamic balance of the rotor. Therefore, by reasonably setting the width of the connecting groove 121b, the wind flow resistance is reduced while the heat dissipation effect of the rotor is increased, thereby improving the gas circulation efficiency of the compressor.

[0035] Specifically, the two permanent magnet slots 121a of the same group of the magnetic flux flow slots 121 are arranged in a V-shape. The V-shaped permanent magnet slot 121a increases the contact area between the permanent magnet 11 and the air gap, so that the magnetic flux can pass through the air gap more easily, thereby improving the utilization rate of the magnetic flux; this helps to increase the output torque of the motor 1 and improve the overall performance of the motor 1. At the same time, the gap of the V-shaped permanent magnet slot 121a is conducive to the circulation of air, thereby improving the heat dissipation performance of the motor 1, thereby reducing the operating temperature of the motor 1, and then helping to improve the reliability and service life of the motor 1. Of course, in other embodiments, the permanent magnet slot 121a can also be a straight line shape, a U shape, etc.

[0036] In one embodiment, the rotor core 12 is provided with a shaft hole 125 and a plurality of flow holes, and a plurality of flow hole spacing rings are arranged on the outer periphery of the shaft hole 125. The shaft hole 125 is used to install the transmission shaft, thereby driving the transmission object to rotate; after the motor 1 is used for a long time, its temperature is likely to rise, which is likely to cause the permanent magnet 11 to demagnetize, thereby causing the permanent magnet 11 to lose its magnetism or reduce its magnetism. Therefore, in this embodiment, by providing a flow hole on the rotor core 12, a coolant flows in the flow hole, and the temperature of the rotor core 12 can be reduced by the coolant, thereby maintaining the temperature and performance of the permanent magnet 11 within the optimal range, thereby improving the performance and service life of the motor 1. Among them, a plurality of flow holes are arranged on the outer periphery of the shaft hole 125, so that the coolant can evenly dissipate heat from the rotor core 12, thereby further reducing the temperature of the rotor core 12, thereby improving the performance and service life of the rotor core 12.

[0037] The rotor core 12 is composed of a plurality of rotor punchings stacked in sequence. By setting the rotor core 12 as a plurality of rotor punchings, when processing the rotor core 12, only a plurality of rotor punchings need to be processed, and then the plurality of rotor punching parts are assembled. Compared with processing a complete rotor core 12, the difficulty of processing the rotor punching parts is reduced, and it is convenient to realize the automated production of the rotor core 12 through an automated production line, thereby reducing the production cost.

[0038] Optionally, the rotor punching sheet is a soft magnetic material punching sheet. The soft magnetic material can achieve a larger magnetization intensity with a smaller external magnetic field. The soft magnetic material has a low coercive force and a high magnetic permeability, which is beneficial to reducing the loss of the rotor core 12, that is, reducing the iron loss of the motor 1, and thus helping to improve the performance of the motor 1. It is understandable that the rotor punching sheet can also be made of neodymium iron boron or ferrite or other materials.

[0039] Furthermore, in this embodiment, the rotor core 12 is a silicon steel sheet, which can reduce eddy current loss and hysteresis loss, thereby reducing the heat generation of the rotor core 12, and the multiple silicon steel sheets are insulated from each other, which can reduce the flow area and further reduce the heat generation.

[0040] Reference Figure 4 The present invention further proposes a motor 1, which includes a stator 20 and a rotor. The specific structure of the rotor refers to the above embodiment. Since the motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0041] Reference Figure 5The present invention further proposes a compressor, which includes a motor 1. The specific structure of the motor 1 refers to the above embodiment. Since the compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0042] The present invention also proposes a refrigeration device, wherein the refrigeration device can be divided into a compression refrigeration device, an absorption refrigeration device, a steam jet refrigeration device, a heat pump refrigeration device and an electric refrigeration device. The refrigeration device mainly includes a compressor, an electronic expansion valve, an evaporator, a condenser and accessories, and pipelines. Such as a refrigerator, an air conditioner, etc. The specific structure of the compressor refers to the above embodiment. Since the refrigeration device in the present invention adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0043] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rotor, characterized in that: include: permanent magnet; and A rotor core, wherein a plurality of groups of magnetic flux flow slots are provided on the rotor core, each group of the magnetic flux flow slots includes two magnetic flux flow slots, the magnetic flux flow slots include a permanent magnet slot, a connecting slot and a first flow hole, the permanent magnet slot is connected to the first flow hole through the connecting slot, at least one permanent magnet is provided in each of the permanent magnet slots, two of the magnetic flux flow slots in the same group are spaced apart to form a magnetic bridge, the minimum width of the magnetic bridge is d, 0.4mm≤d≤3mm.

2. The rotor according to claim 1, characterized in that The permanent magnet slots penetrate the outer periphery of the rotor core.

3. The rotor according to claim 1, characterized in that The permanent magnet slots are not connected to the outer periphery of the rotor core.

4. The rotor according to claim 1, characterized in that The rotor core is provided with a plurality of second flow holes, the sum of the cross-sectional areas of the plurality of second flow holes is S, the maximum radius of the rotor core is r, 0.04≤ ≤0.

1.

5. The rotor according to claim 1, characterized in that The rotor core is provided with a magnetic isolation groove, and the magnetic isolation groove is arranged on the side of the permanent magnet slot facing the outer peripheral wall of the rotor core.

6. The rotor according to claim 1, characterized in that The length of the magnetic bridge is L, the maximum radius of the rotor core is r, and 0.05r≤L≤0.4r.

7. The rotor according to claim 1, characterized in that The width of the connecting groove is w, d≤w≤5d.

8. A motor, characterized in that: Comprising a rotor as claimed in any one of claims 1 to 7.

9. A compressor, characterized in that: Comprising the motor as claimed in claim 8.

10. A refrigeration device, characterized in that: Comprising the compressor of claim 9.

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