CN214590793U

CN214590793U - Stator, motor, compressor and refrigeration plant

Info

Publication number: CN214590793U
Application number: CN202023229169.4U
Authority: CN
Inventors: 徐飞; 邱小华; 江波
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-11-02
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to the technical field of motors, concretely relates to stator, motor, compressor and refrigeration plant. The stator comprises a stator core, a stator winding and a retaining piece, wherein the stator core is provided with a first end face and a second end face; the stator winding comprises a first part, a second part and a third part, wherein the first part, the second part and the third part are positioned outside the stator slot; the holding piece comprises a first holding part, a second holding part and a third holding part, wherein the first holding part is arranged on the first end surface, the second holding part is arranged on the second end surface, and two end parts of the third holding part are respectively connected with the first holding part and the second holding part; the inner edge of the second portion of each of the first and second retainers is located between the inner edge of the first portion of the retainer and the inner edge of the tooth shoe of the stator tooth. Utilize the utility model discloses the stator can reduce the vibration noise of the motor including the stator and improve the efficiency of the motor including the stator.

Description

Stator, motor, compressor and refrigeration plant

Technical Field

The utility model relates to the technical field of motors, concretely relates to stator, motor, compressor and refrigeration plant.

Background

In the related art, the motor of the rotary compressor generally adopts the interior permanent magnet motor, and in recent years, with the improvement of the power density of the motor, higher requirements are provided for the vibration noise of the motor, while the prior motor cannot meet the requirement of silence more and more.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent.

The present invention is made based on the discovery and recognition by the inventors of the following facts and problems:

at present, a stator core of a motor is compressed by stator punching sheets and various fasteners to form a whole, for example, the stator punching sheets are connected in an axial direction by rivets. The vibration noise generated by the motor has the following reasons:

1. because the rigidity of connection between each stator punching is low, lead to stator core's rigidity low, and then lead to the motor operation including the stator to produce great vibration noise.

2. When electromagnetic force acts on the tooth shoes of the stator core, the electromagnetic force is transmitted outward along the tooth shoes, the tooth portions, and the yoke portion of the stator core, causing deformation of the outer edge of the stator core, which also causes a large noise radiation during operation of the motor including the stator.

3. In the manufacturing process of the stator, for example, when the stator is in interference fit with a compressor shell, assembly stress can be generated, on one hand, the assembly stress is transmitted inwards to cause the deformation of the inner diameter of a stator core, and cause the uneven clearance between the stator and a rotor of the motor, and finally cause the deterioration of vibration noise of the motor comprising the stator during operation; on the other hand, assembly stress increases core loss of the stator, eventually leading to a decrease in efficiency of a motor including the stator.

To this end, an aspect of the present invention provides a stator to reduce vibration noise of a motor including the stator, to improve efficiency of the motor including the stator.

Another aspect of the utility model provides a motor to reduce the vibration noise of motor, improve the efficiency of motor.

The utility model discloses a still another aspect provides the compressor to reduce the vibration noise of compressor, improve the efficiency of compressor.

The utility model discloses a further aspect provides refrigeration plant to reduce refrigeration plant's vibration noise, improve refrigeration plant's efficiency.

According to the utility model discloses stator includes:

a stator core including a yoke portion and a plurality of stator teeth, a stator slot being defined between adjacent two of the stator teeth and the yoke portion, the stator core having first and second end surfaces that are opposite in an axial direction thereof;

a stator winding wound on the stator teeth, the stator winding including a first portion, a second portion, and a third portion, the first and second portions of the stator winding being located outside the stator slot, the third portion of the stator winding being located within the stator slot;

a holder, the holder comprising:

a first holding portion provided on the first end surface of the stator core, and a second holding portion provided on the second end surface of the stator core; and

a third holding portion, at least a part of which is provided in the stator slot, the third holding portion having a first end portion and a second end portion that are opposite in an axial direction of the stator core, the first end portion of the third holding portion being connected to the first holding portion, the second end portion of the third holding portion being connected to the second holding portion;

a first portion of the holder is opposed to the stator slot in an axial direction of the stator core, a second portion of each of the first and second holding portions is opposed to the stator teeth in the axial direction of the stator core, and an inner edge of the second portion of each of the first and second holding portions is located between an inner edge of the first portion of the holder and an inner edge of a tooth shoe portion of the stator teeth in an inner and outer direction.

By utilizing the stator according to the embodiment of the present invention, the vibration noise of the motor including the stator can be reduced and the efficiency of the motor including the stator can be improved.

In some embodiments, the stator core includes:

a body having first and second end faces opposing in an axial direction of the stator core;

an insulating skeleton, the insulating skeleton includes:

the first framework comprises a first framework body and a first blocking ring, the first framework body is arranged on the first end face, the first blocking ring is arranged on the first framework body, the first retaining portion is arranged on the end face, far away from the body, of the first framework body, the first retaining portion is connected with the first blocking ring, and the outer edge of the first retaining portion is located on the inner side of the outer edge of the first blocking ring in the inner and outer directions; and

the second framework comprises a second framework body and a second retaining ring, the second framework body is arranged on the second end face, the second retaining ring is arranged on the second framework body, the second retaining portion is arranged on the second framework body and far away from the second framework body, the second retaining portion is connected with the second retaining ring, and the outer edge of the second retaining portion is located on the inner side of the outer edge of the second retaining ring in the inner and outer directions.

In some embodiments, the first baffle ring is provided with a first combining part which is a combining groove or a combining hole, and a part of the first retaining part is fitted in the first combining part;

and a second combining part is arranged on the second retaining ring, the second combining part is a combining groove or a combining hole, and one part of the second retaining part is matched in the second combining part.

In some embodiments, the stator core includes a body having first and second end faces opposing in an axial direction of the stator core, the first holding portion is provided on the first end face of the body, and the second holding portion is provided on the second end face of the body;

an outer edge of the first holding portion is located inward of an outer edge of the yoke portion in an inward and outward direction;

an outer edge of the second holding portion is located inward of an outer edge of the yoke portion in the inward and outward direction.

In some embodiments, an outer edge of the third retaining portion is located inward of an outer edge of the yoke portion in an inward and outward direction.

In some embodiments, the first retainer covers at least a portion of the first portion and the second retainer covers at least a portion of the second portion.

In some embodiments, the third retaining portion encases at least a portion of the third portion. The third holding portion covers at least a part of the third portion

In some embodiments, the third retaining portion is a plurality of the third retaining portions filling the plurality of stator slots in a one-to-one correspondence to cover the third portion, wherein the third retaining portion constitutes a part of the first portion of the retainer.

In some embodiments, the retainer is integrally injection molded.

According to the utility model discloses motor includes the stator, the stator includes:

a holder, the holder comprising:

According to the utility model discloses motor has the vibration noise that can reduce the motor and improves advantages such as efficiency of motor.

In some embodiments, the stator core includes:

an insulating skeleton, the insulating skeleton includes:

In some embodiments, the third retaining portion encases at least a portion of the third portion.

In some embodiments, the retainer is integrally injection molded. The third holding portion covers at least a part of the third portion

According to the utility model discloses compressor includes the motor, the motor includes the stator, the stator includes:

a holder, the holder comprising:

According to the utility model discloses compressor has the vibration noise that can reduce the compressor and improves advantages such as efficiency of compressor.

In some embodiments, the stator core includes:

an insulating skeleton, the insulating skeleton includes:

According to the utility model discloses refrigeration plant includes the compressor, the compressor includes the motor, the motor includes the stator, the stator includes:

a holder, the holder comprising:

According to the utility model discloses refrigeration plant has advantages such as vibration noise that can reduce refrigeration plant and improve refrigeration plant's efficiency.

In some embodiments, the stator core includes:

an insulating skeleton, the insulating skeleton includes:

Drawings

Fig. 1 is a perspective view of a stator (a holder is not shown) according to one embodiment of the present invention.

Fig. 2 is a perspective view of the stator core of fig. 1.

Fig. 3 is a bottom view of fig. 2.

Fig. 4 is a perspective view of the body of fig. 1.

Fig. 5 is a schematic structural view of a stator according to an embodiment of the present invention.

Fig. 6 is a schematic structural view from another perspective of a stator according to an embodiment of the present invention.

Fig. 7 is a top view of a stator according to one embodiment of the present invention.

Fig. 8 is a schematic structural view of a stator according to another embodiment of the present invention.

Fig. 9 is a structural schematic diagram of another perspective of a stator according to another embodiment of the present invention.

Fig. 10 is a top view of a stator according to another embodiment of the present invention.

Fig. 11 is a top view of the retainer of fig. 9.

Fig. 12 is a schematic structural view of a compressor according to an embodiment of the present invention.

Reference numerals: a stator 1; a stator core 10; a body 110; a yoke 101; stator teeth 102; a tooth 1021; tooth shoes 1022; an inner edge 1023; an outer edge 1024; a stator slot 103; a first end face 104; a second end face 105; an insulating skeleton 120; a first skeleton 121; first end 1211 (11); a first frame 1212; a first baffle ring 1213; an outer edge 12131; a first bonding portion 1214; a second skeleton 122; a second end face 1221 (12); a second frame 1222; a second stopper ring 1223; an outer edge 12231; a second combining part 1224; a stator winding 20; a first portion 201; a second portion 202; a third portion 203; a holder 30; a first holding portion 301; an outer edge 3011; a second holding portion 302; an outer rim 3021; a third holding portion 303; a first end portion 3031; a second end portion 3032; a first portion 304; an inner edge 3041; a second portion 305; an inner edge 3051; a compressor 100; a motor 1000; a housing 1001; a rotor 1002; a crankshaft 1003; a main bearing 1004; a cylinder 1005; a piston 1006; the sub-bearing 1007.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 10, a stator 1 according to an embodiment of the present invention includes a stator core 10, a stator winding 20, and a holder 30. The stator core 10 includes a yoke portion 101 and a plurality of stator teeth 102, a stator slot 103 is defined between adjacent two stator teeth 102 and the yoke portion 101, and the stator core 10 has a first end face 11 and a second end face 12 that are opposite in an axial direction thereof. The stator winding 20 is wound on the stator teeth 102, the stator winding 20 includes a first portion 201, a second portion 202, and a third portion 203, the first portion 201 and the second portion 202 are located outside the stator slot 103, and the third portion 203 is located inside the stator slot 103.

As shown in fig. 5, 6, 7, 8, and 9, the holder 30 includes a first holding portion 301, a second holding portion 302, and a third holding portion 303, the first holding portion 301 being provided on the first end face 11 of the stator core 10, and the second holding portion 302 being provided on the second end face 12 of the stator core 10. At least a part of the third holding portion 303 is provided in the stator slot 103, the third holding portion 303 has a first end portion 3031 and a second end portion 3032 opposite in the axial direction of the stator core 10, the first end portion 3031 of the third holding portion 303 is connected to the first holding portion 301, and the second end portion 3032 of the third holding portion 303 is connected to the second holding portion 302.

As shown in fig. 5 to 10, the first portion 304 of the holder 30 is opposed to the stator slot 103 in the axial direction of the stator core 30, the second portion 305 of each of the first holding portion 301 and the second holding portion 302 is opposed to the stator tooth 102 in the axial direction of the stator core 30, and the inner edge 3051 of the second portion 305 of each of the first holding portion 301 and the second holding portion 302 is located between the inner edge 3041 of the first portion 304 of the holder 30 and the inner edge 1023 of the tooth shoe 1022 of the stator tooth 102 in the inward and outward direction.

In the prior art, a stator core is formed by compressing stator laminations and various fasteners into a whole, for example, the stator laminations are connected in an axial direction by rivets. Firstly, the rigidity of the stator core is low due to the low connection rigidity between the stator punching sheets, and further, a motor including the stator generates large vibration noise when running. Secondly, when electromagnetic force acts on the tooth shoes of the stator core, the electromagnetic force is transmitted outward along the tooth shoes, the tooth portions, and the yoke portion of the stator core, causing deformation of the outer circumferential surface of the stator core, which also causes large noise radiation during operation of the motor including the stator. Finally, assembly stress can be generated during the manufacturing process of the stator, for example, when the stator is in interference fit with a compressor shell, on one hand, the assembly stress is transmitted inwards to cause the deformation of the inner diameter of the stator core, and cause the uneven gap between the stator and the rotor of the motor, and finally cause the vibration noise of the motor comprising the stator to be worsened during the operation; on the other hand, assembly stress increases core loss of the stator, eventually leading to a decrease in efficiency of a motor including the stator.

The stator 1 according to the embodiment of the present invention is configured such that the first holding portion 301 is provided on the first end face 11 of the stator core 10 and the second holding portion 302 is provided on the second end face 1221 of the stator core 10, and the first holding portion 301 and the second holding portion 302 are connected by the third holding portion 303 so that the holder 30 is integrated. Therefore, the plurality of stator laminations of the stator core 10 can be clamped (pressed) in the axial direction of the stator core 10 by the first holding portion 301 and the second holding portion 302, so that the connection rigidity of the plurality of stator laminations of the stator core 10 can be remarkably improved, and the rigidity of the stator core 10 can be remarkably improved.

Thus, not only vibration noise generated due to low connection rigidity of the plurality of stator segments of the stator core 10, but also noise radiation generated due to deformation of the yoke portion 101 by electromagnetic force (e.g., deformation of the outer circumferential surface of the stator core 10) and vibration noise generated due to deformation caused by assembling the stator 1 (e.g., deformation of the inner diameter of the stator core 10, i.e., deformation of the inner circumferential surface of the stator core 10) can be significantly reduced or even eliminated.

Furthermore, by significantly improving the rigidity of the stator core 10, the deformation of the stator core 10 can be significantly reduced or even eliminated, so that the stress core loss due to the deformation of the stator core 10 can be significantly reduced or even eliminated, so as to significantly improve the efficiency of the motor including the stator 1.

Therefore, by using the stator 1 according to the embodiment of the present invention, it is possible to reduce vibration noise of the motor including the stator 1 and improve efficiency of the motor including the stator 1.

As shown in fig. 5 to 10, the stator 1 according to the embodiment of the present invention includes a stator core 10, a stator winding 20, and a holder 30.

The stator core 10 includes a yoke portion 101 and a plurality of stator teeth 102, and each stator tooth 102 includes a tooth portion 1021 and a tooth shoe 1022. Alternatively, a plurality of stator teeth 102 are provided on the yoke portion 101 at intervals in the circumferential direction of the stator core 10. A stator slot 103 is defined between two adjacent stator teeth 102 and the yoke 101, i.e., the stator core 10 has a plurality of stator slots 103.

As shown in fig. 5-7, in some embodiments, the stator core 10 includes a body 110 and an insulating skeleton 120, the body 110 having a first end face 104 and a second end face 105 opposite in an axial direction of the stator core 10.

The insulating bobbin 120 has a first end 1211 and a second end 1221 opposed to each other in the axial direction of the stator core 10, and the first end 1211 and the second end 1221 of the insulating bobbin 120 are opposed to each other in the axial direction of the stator core 10. That is, the first end 1211 of the insulating bobbin 120 is the first end 11 of the stator core 10, and the second end 1221 of the insulating bobbin 120 is the second end 12 of the stator core 10. The axial direction of the stator core 10 is indicated by an arrow a in fig. 1.

The insulating bobbin 120 includes a first bobbin 121 and a second bobbin 122, and the first bobbin 121 and the second bobbin 122 may be known and are not related to the inventive point of the present application and thus will not be described in detail.

As shown in fig. 1, 2, 3, 5, 6, and 7, the first frame 121 includes a first frame body 1212 and a first blocking ring 1213, the first frame body 121 is disposed on the first end surface 104, and the first blocking ring 1213 is disposed on the first frame body 1212. The second frame 122 includes a second frame body 1222 and a second retaining ring 1223, the second frame body 1222 is disposed on the second end surface 105, and the second retaining ring 1223 is disposed on the second frame body 1222.

The stator winding 20 is wound on the stator teeth 102, and the stator winding 20 includes a first portion 201, a second portion 202, and a third portion 203. Wherein the first portion 201 and the second portion 202 are located outside the stator slot 103 and the third portion 203 is located inside the stator slot 103. For example, the first portion 201 extends upward out of the stator slot 103, the second portion 202 extends downward out of the stator slot 103, the first end 1211 of the insulating frame 120 is an upper end of the stator core 10, the second end 1221 of the insulating frame 120 is a lower end of the stator core 10, and the axial direction of the stator core 10 is the same as the vertical direction. The up-down direction is shown by arrow B in fig. 2.

As shown in fig. 5 and 6, the holder 30 includes a first holding portion 301, a second holding portion 302, and a third holding portion 303, wherein the first holding portion 301 is provided on an end surface of the first holder body 1212 facing away from the body 110, the first holding portion 301 is connected to the first stopper ring 1213, the second holding portion 302 is provided on an end surface of the second holder body 1222 facing away from the body 110, and the second holding portion 302 is connected to the second stopper ring 1223.

For example, the first end surface 104 of the body 110 is located above the second end surface 105, the first rib 121 is disposed above the first end surface 104 (upper end portion), and the second rib 122 is disposed below the second end surface 105 (lower end portion). The first holding portion 301 is provided on an upper end surface of the first housing 1212, and the second holding portion 302 is provided on a lower end surface of the second housing 1222. The upper end of the third holding portion 303 is connected to the first holding portion 301, and the lower end of the third holding portion 303 is connected to the second holding portion 302.

The first portion 304 of the holder 30 is opposed to the stator slot 103 in the axial direction of the stator core 30, the second portion 305 of each of the first and second holding

portions

301 and 302 is opposed to the stator tooth 102 in the axial direction of the stator core 30, and the inner edge 3051 of the second portion 305 of each of the first and second holding

portions

301 and 302 is located between the inner edge 3041 of the first portion 304 of the holder 30 and the inner edge 1023 of the tooth shoe 1022 of the stator tooth 102 in the inward and outward direction. The first portion 304 of the holder 30 includes a portion of the first holding portion 301 that is opposed to the stator slot 103 in the axial direction of the stator core 30, a portion of the second holding portion 302 that is opposed to the stator slot 103 in the axial direction of the stator core 30, and a portion of the third holding portion 302 that is located within the stator slot 103.

As shown in fig. 9, the inner edge 3051 of the second portion 305 of each of the first holding portion 301 and the second holding portion 302 is located between the inner edge 3041 of the first portion 304 of the holder 30 and the inner edge 1023 of the tooth shoe 1022 of the stator tooth 102 in the inward and outward direction, that is, the distance L1 from the first portion 304 of the holder 30 to the central axis of the stator core 10, the distance L2 from the inner edge 3051 of the second portion 305 of each of the first holding portion 301 and the second holding portion 302 to the central axis of the stator core 10, and the distance L3 from the inner edge 1023 of the tooth shoe 1022 of the stator tooth 102 to the central axis of the stator core 10 satisfy: l1 > L2 > L3.

In this way, the plurality of stator core segments of the stator core 10 can be sandwiched better in the axial direction of the stator core 10 by the first holding portion 301 and the second holding portion 302, so that the connection rigidity of the plurality of stator core segments of the stator core 10 can be significantly improved, and the rigidity of the stator core 10 can be significantly improved. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved.

Here, inward refers to a direction adjacent to the central axis of the stator core 10 on a plane perpendicular to the axial direction of the stator core 10, and outward refers to a direction away from the central axis of the stator core 10 on a plane perpendicular to the axial direction of the stator core 10. The inward and outward directions are indicated by arrows C in fig. 3. When the stator 1 is assembled with the rotor, the inner edge is adjacent to the rotor with respect to the outer edge.

In some embodiments, the outer edge 3011 of the first retaining portion 301 is located inward in the inward and outward direction of the outer edge 12131 of the first stopper ring 1213, and the outer edge 3021 of the second retaining portion 302 is located inward in the inward and outward direction of the outer edge 12231 of the second stopper ring 1223. In other words, the distance L4 from the outer edge 12131 of the first stopper ring 1213 to the central axis of the stator core 10 and the distance L5 from the outer edge 3011 of the first holding portion 301 to the central axis of the stator core 10 satisfy: l4 > L5, and accordingly, the distance from the outer edge 12231 of the second retainer 1223 to the central axis of the stator core 10 is larger than the distance from the outer edge 3021 of the second holding portion 302 to the central axis of the stator core 10.

As shown in fig. 12, since the outer edge 1024 of the stator core 10 contacts with the housing 1001 of the compressor 100 when the stator 1 is assembled with the housing 1001 of the compressor 100, the outer edge 3011 of the first retaining portion 301 is located inside the outer edge 12131 of the first baffle ring 1213 and the outer edge 3021 of the second retaining portion 302 is located inside the outer edge 12231 of the second baffle ring 1223, when the stator 1 is assembled with the housing 1001 of the compressor 100, the outer edge 3011 of the first retaining portion 301 and the outer edge 3021 of the second retaining portion 302 are prevented from directly contacting with the housing 1001 of the compressor 100, and the retainer 30 is prevented from being broken and generating swarf during assembly, thereby causing the compressor pump body to be locked and to malfunction, and affecting the refrigeration effect of the compressor.

In some embodiments, the retainer 30 is integrally injection molded, i.e., the first retaining portion 301, the second retaining portion 302, and the third retaining portion 303 are integrally injection molded. The integral injection molding of the retainer 30 is beneficial to further improving the connection rigidity of the plurality of stator laminations of the stator core 10, thereby improving the rigidity of the stator core 10. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved.

Since the resin material is mixed by an optimum compounding ratio of the specific material, it is possible to achieve a more desirable material rigidity and injection flow effect, and therefore, it is preferable that the holder 30 is a resin material.

Specifically, the body 110 may be formed by stacking a plurality of stator punching sheets of the stator core 10, the insulating frame 120 may be mounted on the body 110, the holder 30 may be integrally injection-molded on the body 110 and the insulating frame 120, and the stator winding 20 may be wound on the stator core 10.

As shown in fig. 5 and 6, in some embodiments, the first baffle ring 1213 is provided with a first combining portion 1214, the first combining portion 1214 is a combining groove or a combining hole, and a portion of the first holding portion 301 is fitted into the first combining portion 1214. The second stopper 1223 is provided with a second combining portion 1224, the second combining portion 1224 is a combining groove or a combining hole, and a portion of the second holding portion 302 is fitted in the second combining portion 1224.

By fitting a part of the first holding portion 301 into the first coupling portion 1214 and fitting a part of the second holding portion 302 into the second coupling portion 1224, the contact area between the first holding portion 301 and the first bobbin 121 and the contact area between the second holding portion 302 and the second bobbin 122 can be increased, so that the first holding portion 301 and the first bobbin 121 are more firmly coupled together and the second holding portion 302 and the second bobbin 122 are more firmly coupled together, and thus the plurality of stator laminations of the stator core 10 can be sandwiched better in the axial direction of the stator core 10 by the first holding portion 301 and the second holding portion 302, so that the connection rigidity of the plurality of stator laminations of the stator core 10 can be significantly improved, and the rigidity of the stator core 10 can be significantly improved. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved.

As shown in fig. 8-11, in some embodiments, the first holding portion 301 is disposed on the first end face 104 of the body 110, the second holding portion 302 is disposed on the second end face 105 of the body 110, an outer edge 3011 of the first holding portion 301 is located inside an outer edge 1024 of the yoke portion 101 in the inward and outward direction, and an outer edge 3021 of the second holding portion 302 is located inside the outer edge 1024 of the yoke portion 101 in the inward and outward direction. That is, as shown in fig. 10 and 11, a distance L4 from the outer edge 1024 of the yoke portion 101 to the central axis of the stator core 10 and a distance L5 from the outer edge 3011 of the first holding portion 301 to the central axis of the stator core 10 satisfy: l4 > L5, and accordingly, the distance from the outer edge 1024 of the yoke portion 101 to the central axis of the stator core 10 is larger than the distance from the outer edge 3021 of the second holding portion 302 to the central axis of the stator core 10.

Therefore, when the stator 1 is assembled with the shell 1001 of the compressor 100, the outer edge 3011 of the first holding portion 301 and the outer edge 3021 of the second holding portion 302 can be prevented from directly contacting with the shell 1001 of the compressor 100, so that the situation that the retainer 30 is cracked and generates powder scraps during assembly, and further a compressor pump body is locked and rotated, and the compressor refrigeration effect is influenced due to faults can be avoided.

At this time, the stator core 10 does not include the insulating frame 120, and when the holder 30 is integrally injection-molded, a plurality of stator punching sheets of the stator core 10 may be firstly stacked together to form the body 110, then the stator winding 20 is wound around the stator core 10, and finally the holder 30 is integrally injection-molded on the body 110.

In some embodiments, the outer edge of the third holding portion 303 is located inside the outer edge 1024 of the yoke portion 101 in the inward and outward direction, in other words, the distance from the outer edge 1024 of the yoke portion 101 to the central axis of the stator core 10 is greater than the distance from the outer edge of the third holding portion 303 to the central axis of the stator core 10. Therefore, when the stator 1 is assembled with the shell 1001 of the compressor 100, the outer edge of the third retaining part 303 can be prevented from being in direct contact with the shell 1001 of the compressor 100, so that the situation that the retainer 30 is cracked and generates powder scraps during assembly, and further the compressor pump body is locked up and rotates, breaks down and influences the refrigeration effect of the compressor is avoided.

As shown in fig. 5 and 6, in some embodiments, the first retaining portion 301 covers at least a portion of the first portion 201 and the second retaining portion 302 covers at least a portion of the second portion 202. The first and second holding

portions

301 and 302 cover at least a part of the first and

second portions

201 and 202. In this way, the thickness of the third holding portion 303 can be increased in the axial direction of the stator core 10, thereby improving the rigidity of the stator core 10. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved. Further, when the retainer 30 is integrally injection molded, the difficulty of injection molding of the retainer 30 can be reduced by having the first retaining portion 301 cover at least a portion of the first portion 201 and the second retaining portion 302 cover at least a portion of the second portion 202.

For example, as shown in fig. 5 and 6, the first holding portion 301 covers only the lower portion of the first portion 201 of the stator winding 20, while the upper portion of the first portion 201 of the stator winding 20 exposes the first holding portion 301, the second holding portion 302 covers only the upper portion of the second portion 202 of the stator winding 20, and the lower portion of the second portion 202 of the stator winding 20 exposes the second holding portion 302.

Of course, as shown in fig. 8 to 10, the first holding portion 301 may cover the entire first portion 201 of the stator winding 20, and the second holding portion 302 may cover the entire second portion 202 of the stator winding 20. At this time, the structure of the holder 30 is as shown in fig. 11.

As shown in fig. 5, 6, 8, and 9, in some embodiments, third retention feature 303 wraps around at least a portion of third portion 203 of stator winding 20. In this way, the thickness of the third holding portion 303 can be increased in the inward and outward directions, and the rigidity of the stator core 10 can be improved. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved.

As shown in fig. 5, 6, 8, and 9, the third holding portion 303 is plural, and the plural third holding portions 303 fill the plural stator slots 103 in one-to-one correspondence so as to cover the third portion 203. In other words, each stator slot 103 is filled with the third holding portion 303. The third retaining portion 303 now constitutes a part of the first portion 304 of the retainer 30 as a whole.

This can significantly increase the thickness of the third holding portion 303 in the inward and outward directions, thereby improving the rigidity of the stator core 10. Accordingly, not only vibration noise due to low rigidity of the stator core 10 but also vibration noise due to deformation of the stator core 10 can be significantly reduced or even eliminated, and stress core loss due to deformation of the stator core 10 can be significantly reduced or even eliminated, so that efficiency of the motor including the stator 1 can be significantly improved. In addition, when the holder 30 is integrally injection molded, the injection molding difficulty of the holder 30 can be reduced by filling the third holding portion 303 with the stator slot 103.

As shown in fig. 12, the present invention also provides a motor 1000. The motor 1000 according to an embodiment of the present invention includes the stator 1 according to the above-described embodiment of the present invention. Therefore, the motor 1000 according to the embodiment of the present invention has the advantages of low vibration noise, high efficiency, and the like.

Those skilled in the art will appreciate that the motor 1000 according to an embodiment of the present invention further includes a rotor 1002. With the number of stator slots 104 of the stator 1 being Z, the number of pole pairs of the rotor 1002 being P, the ratio of Z to 2P is equal to 3/2 or 6/5 or 6/7. The proportional relation between the number Z of the stator slots 104 and the number P of the pole pairs of the rotor is defined, and then the pole slot matching of the motor 1000 is defined, wherein when the number P of the pole pairs of the rotor 1002 is defined, then the number of the pole pairs of the rotor 1002 is 2P, that is, the motor 1000 can be a 6-pole 9-slot motor, a 4-pole 6-slot motor, an 8-pole 12-slot motor, a 10-pole 12-slot motor, and the motor 1000 of the above type can effectively reduce armature iron loss, promote magnetic flux, and further promote the efficiency of the motor 1000.

Preferably, the inner diameter of the stator core 10 is Di, the rated torque of the motor 1000 is T, and the unit volume torque of the rotor 1002 is TPV, which satisfy the following relation: t × Di of 5.18 × 10-7 ≤^-3×TPV^-1≤1.17×10^-6，5kN·m·m-3≤TPV≤45kN·m·m^-3(ii) a The rated torque T of the motor 1000 is expressed in N · m, the inner diameter Di of the stator core 10 is expressed in mm, and the unit volume torque TPV of the rotor 1002 is expressed in kN · m ″^-3。

In this embodiment, the rated torque of the motor 1000 is T, the inner diameter of the stator core 10 is Di, and the torque per unit volume of the rotor 1002 is TPV, and satisfies the condition that T × Di is not less than 5.18 × 10-7^-3×TPV-1≤1.17×10^-6The value range of the unit volume torque TPV is 5 kN.m.m^-3≤TPV≤45kN·m·m^-3The value range of the combined variables of the rated torque T of the motor 1000, the inner diameter Di of the stator core 10 and the unit volume torque TPV of the rotor 1002 is limited, so that the motor 1000 can meet the power requirement of the compressor, and in addition, the motor 1000 and the compressor 100 adopting the rotor 1002 can effectively reduce the magnetic leakage of the rotor 1002, increase the utilization rate of the permanent magnet and improve the efficiency of the motor 1000.

Preferably, a side of the plurality of tooth shoes 103 facing the rotor encloses an inner circumferential surface of the stator 1, and a ratio of a diameter of the inner circumferential surface of the stator 1 to a diameter of an outer edge of the stator core 10 is greater than 0.5 and equal to or less than 0.58.

In this embodiment, the ratio of the diameter of the inner peripheral surface of the stator 1 to the diameter of the outer edge of the stator core 10 is greater than 0.5 and equal to or less than 0.57 so that the motor has high cost performance.

The present invention also provides a compressor 100. The compressor 100 according to the embodiment of the present invention includes the motor 1000 according to the above-described embodiment of the present invention.

Therefore, the compressor 100 according to the embodiment of the present invention has the advantages of low vibration noise, high efficiency, etc.

It will be understood by those skilled in the art that the compressor 100 according to the embodiment of the present invention further includes a housing 1001, a crankshaft 1022, a main bearing 102, a cylinder 103, a piston 104, and a sub-bearing 105, as shown in fig. 12. The components of the housing 1001, crankshaft 1022, main bearing 102, cylinder 103, piston 104, and auxiliary bearing 105 may be known and are not relevant to the inventive aspects of the present application and therefore will not be described in detail.

The invention also provides refrigeration equipment. The refrigerating apparatus according to the embodiment of the present invention includes the compressor 100 according to the above-described embodiment of the present invention.

Therefore, the refrigeration equipment provided by the embodiment of the invention has the advantages of low vibration noise, high efficiency and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A stator, comprising:

a holder, the holder comprising:

2. The stator of claim 1, wherein the stator core comprises:

an insulating skeleton, the insulating skeleton includes:

3. The stator according to claim 2,

the first retaining ring is provided with a first combining part which is a combining groove or a combining hole, and one part of the first retaining part is matched in the first combining part;

4. The stator according to claim 1, wherein the stator core includes a body having first and second end faces opposed in an axial direction of the stator core, the first holding portion being provided on the first end face of the body, the second holding portion being provided on the second end face of the body;

5. The stator according to any one of claims 1 to 4, wherein an outer edge of the third holding portion is located inside an outer edge of the yoke portion in an inward and outward direction.

6. The stator of any one of claims 1-4, wherein the first retention portion covers at least a portion of the first portion and the second retention portion covers at least a portion of the second portion.

7. The stator of any one of claims 1-4, wherein the third retention portion encases at least a portion of the third portion.

8. The stator according to claim 7, wherein the third holding portion is plural in number, and the plural third holding portions fill the plural stator slots in one-to-one correspondence so as to wrap the third portion, wherein the third holding portion constitutes a part of the first portion of the holder.

9. A stator according to any of claims 1-4, wherein the holder is injection moulded in one piece.

10. Electrical machine, characterized in that it comprises a stator according to any of claims 1-9.

11. Compressor, characterized in that it comprises an electric motor, said electric motor being according to claim 10.

12. Refrigeration device, characterized in that it comprises a compressor, said compressor being a compressor according to claim 11.