CN220775477U - Stator punching sheet, stator core, motor, compressor and refrigeration equipment - Google Patents

Abstract

The utility model discloses a stator punching sheet, a stator core, a motor, a compressor and refrigeration equipment, wherein the stator punching sheet comprises a stator yoke, the outer peripheral surface of the stator yoke is alternately provided with a circular arc section and a buffer section, the buffer section comprises a curve section and two arc sections, the two arc sections are positioned on two opposite sides of the curve section, the distance from the arc section to the center of the stator punching sheet is smaller than the distance from the circular arc section to the center of the stator punching sheet, and the curve section is tangent with an extension line of the circular arc section and has a tangent point. The stator punching sheet can adjust stator fixed frequency, thereby avoiding resonance between the motor stator and other structures of the compressor.

Description

Stator punching sheet, stator core, motor, compressor and refrigeration equipment

Technical Field

The utility model relates to the technical field of compressors, in particular to a stator punching sheet, a stator core, a motor, a compressor and refrigeration equipment.

Background

The existing household air conditioner compressor motor mainly adopts a variable frequency motor, the input current of the variable frequency motor is a modulation wave, and the carrier wave of the modulation wave is a high-frequency carrier wave. Since the stator frequency of the motor is between hundreds and thousands, resonance is caused when the stator frequency of the motor is close to the high-frequency carrier, and thus high-frequency noise is generated. High frequency carrier noise severely affects the user's hearing experience, while vibration degradation can also directly affect the product's life. Therefore, how to solve the resonance of the motor in the prior art is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The utility model mainly aims to provide a stator punching sheet which aims to adjust stator fixed frequency so as to avoid resonance between a motor stator and other structures of a compressor.

In order to achieve the above purpose, the stator punching sheet provided by the utility model comprises a stator yoke, wherein the outer peripheral surface of the stator yoke is alternately provided with an arc section and a buffer section, the buffer section comprises a curve section and two arc sections, the two arc sections are positioned on two opposite sides of the curve section, the distance from the arc section to the center of the stator punching sheet is smaller than the distance from the arc section to the center of the stator punching sheet, and the curve section is tangent to an extension line of the arc section and has a tangent point.

In an embodiment, the stator punching sheet further comprises a plurality of stator teeth connected with the stator yoke, the plurality of stator teeth are arranged at intervals along the inner peripheral surface of the stator yoke, and the curve section is located between two adjacent stator teeth.

In one embodiment, the curved sections are located on the midlines of adjacent two of the stator teeth.

In one embodiment, stator slots are formed between any two adjacent stator teeth, and the number of the stator slots is Q, so that Q is more than or equal to 9 and less than or equal to 15.

In one embodiment, Q is equal to 12.

In an embodiment, the arc segments and/or the buffer segments are equally spaced along the outer circumferential surface of the stator yoke.

In an embodiment, the number of arc segments and/or buffer segments is 3-6.

In an embodiment, the number of arc segments and/or buffer segments is 4.

In one embodiment, the distance from the arc section to the center of the stator punching sheet is R, and R is more than or equal to 42mm and less than or equal to 75mm.

In one embodiment, 45 mm.ltoreq.R.ltoreq.65 mm.

The utility model also provides a stator core, which comprises a plurality of stator punching sheets, wherein the stator punching sheets are arranged in a pressed mode along the axial direction of the stator punching sheets. The stator punching sheet comprises a stator yoke, the outer peripheral surface of the stator yoke is alternately provided with an arc section and a buffer section, the buffer section comprises a curve section and two arc sections, the two arc sections are positioned on two opposite sides of the curve section, the distance from the arc section to the center of the stator punching sheet is smaller than the distance from the arc section to the center of the stator punching sheet, and the curve section is tangent to an extension line of the arc section and has a tangent point.

The utility model also provides a motor which comprises the stator core, wherein the stator core comprises a plurality of stator punching sheets, and the stator punching sheets are arranged in a pressed mode along the axial direction of the stator punching sheets. The stator punching sheet comprises a stator yoke, the outer peripheral surface of the stator yoke is alternately provided with an arc section and a buffer section, the buffer section comprises a curve section and two arc sections, the two arc sections are positioned on two opposite sides of the curve section, the distance from the arc section to the center of the stator punching sheet is smaller than the distance from the arc section to the center of the stator punching sheet, and the curve section is tangent to an extension line of the arc section and has a tangent point.

In one embodiment, the motor includes a stator core and a rotor core that are mated with each other, and a ratio of a number of stator slots of the stator core to a number of stages of the rotor core is 3:2 or 6:5.

the utility model also provides a compressor, which comprises the motor, wherein the motor comprises a stator core, the stator core comprises a plurality of stator punching sheets, and the stator punching sheets are arranged in a pressed mode along the axial direction of the stator punching sheets. The stator punching sheet comprises a stator yoke, the outer peripheral surface of the stator yoke is alternately provided with an arc section and a buffer section, the buffer section comprises a curve section and two arc sections, the two arc sections are positioned on two opposite sides of the curve section, the distance from the arc section to the center of the stator punching sheet is smaller than the distance from the arc section to the center of the stator punching sheet, and the curve section is tangent to an extension line of the arc section and has a tangent point.

The utility model also provides refrigeration equipment, which comprises the compressor, wherein the compressor comprises a motor, the motor comprises a stator core, the stator core comprises a plurality of stator punching sheets, and the stator punching sheets are arranged in a lamination mode along the axial direction of the stator punching sheets. The stator punching sheet comprises a stator yoke, the outer peripheral surface of the stator yoke is alternately provided with an arc section and a buffer section, the buffer section comprises a curve section and two arc sections, the two arc sections are positioned on two opposite sides of the curve section, the distance from the arc section to the center of the stator punching sheet is smaller than the distance from the arc section to the center of the stator punching sheet, and the curve section is tangent to an extension line of the arc section and has a tangent point.

According to the technical scheme, the arc segments and the buffer segments are alternately arranged on the outer peripheral surface of the stator yoke of the stator punching sheet, wherein the buffer segments comprise a curve segment and two arc segments, the two arc segments are positioned on two opposite sides of the curve segment, the distance from the arc segment to the center of the stator punching sheet is smaller than the distance from the arc segment to the center of the stator punching sheet, and the curve segment is tangent to an extension line of the arc segment and has a tangent point. The stator fixed frequency of the stator punching sheet can be adjusted, and the stator fixed frequency of a certain order is modulated into a plurality of different fixed frequencies, so that the motor stator and other structures in the compressor are prevented from generating resonance when the motor works, the noise caused by high-frequency carrier waves is reduced, and the use experience of a user is improved; meanwhile, resonance in the motor is reduced, so that the service life of the product is further prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a stator lamination of the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a schematic view of another embodiment of a stator lamination of the present utility model;

FIG. 4 is a graph showing the noise contrast of the compressor of the present utility model at 60 rps;

fig. 5 is a graph showing the noise contrast of the compressor of the present utility model at 90 rps.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Stator punching sheet	122	Arc segment
100	Stator yoke	200	Stator teeth
				110	Arc section	300	Stator groove
120	Buffer section	400	Round surface
				121	Curve segment

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides an embodiment of a stator punching sheet, wherein a plurality of stator punching sheets are stacked together along the axial direction of the stator punching sheet to form a stator core, and the stator core is a part of a motor and is mainly applied to an air conditioner compressor, an electric vehicle and a fan system. The compressor comprises a motor, the motor comprises a stator core, the stator core comprises a plurality of stator punching sheets which are stacked, the stator punching sheets can be silicon steel sheets, each stator punching sheet comprises a stator yoke and a plurality of stator teeth, the stator yoke is of an annular structure, the inner peripheral surface of the stator yoke is provided with the plurality of stator teeth, each stator tooth is uniformly distributed at intervals along the circumferential direction of the stator yoke and extends inwards along the radial direction of the stator yoke, and stator grooves for placing winding coils are defined between every two adjacent stator teeth and are used for driving a rotor to rotate.

The existing household air conditioner compressor motor mainly adopts a variable frequency motor, the input current of the variable frequency motor is a modulation wave, and the carrier wave of the modulation wave is a high-frequency carrier wave. Since the stator frequency of the motor is between hundreds and thousands, resonance is caused when the stator frequency of the motor is close to the high-frequency carrier, and thus high-frequency noise is generated. High frequency carrier noise severely affects the user's hearing experience, while vibration degradation can also directly affect the product's life.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the stator lamination 10 includes a stator yoke 100, an arc segment 110 and a buffer segment 120 are alternately disposed on an outer peripheral surface of the stator yoke 100, the buffer segment 120 includes a curve segment 121 and two arc segments 122, the two arc segments 122 are located on opposite sides of the curve segment 121, a distance from the arc segment 122 to a center of the stator lamination 10 is smaller than a distance from the arc segment 110 to the center of the stator lamination 10, and the curve segment 121 is tangent to an extension line of the arc segment 110 and has a tangent point.

Specifically, the stator plate 10 has a sheet-like structure having a certain thickness, the stator yoke 100 is disposed in a substantially annular shape, and a plurality of buffer segments 120 disposed at intervals are disposed on the outer peripheral wall surface of the stator yoke 100. The arc segments 110 and the buffer segments 120 are alternately arranged on the outer circumferential surface of the stator yoke 100, which means that the arc segments 110 and the buffer segments 120 are alternately arranged according to an arrangement mode of ABAB … … in the circumferential direction of the stator yoke 100, and the number of the arc segments 110 and the buffer segments 120 may be the same or different. The buffer section 120 includes a curved section 121 and two curved sections 122, where the two curved sections 122 are located at opposite sides of the curved section 121, and it should be noted that the curved sections 122 are formed by recessing an outer circumferential surface of the stator yoke 100 inward, and are embodied in a form of a notch on the outer circumferential surface of the stator yoke 100, and the curved section 121 is located between the two curved sections 122, is embodied in a form of an outer circumferential surface of the stator yoke 100, and is formed by protruding outward at a junction of the two curved sections 122, and is in a solid structure.

The arc segment 122 is recessed from the outer periphery of the stator yoke 100 toward the center of the stator lamination 10. At this moment, after the stator punching sheet 10 is installed, the arc segment 122 is not in direct contact with the inner wall of the shell, on one hand, the transmission of vibration during motor operation can be further reduced, resonance is effectively avoided, noise is reduced, on the other hand, the magnetic circuit structure from the stator teeth 200 to the stator yoke 100 is optimized, and then the magnetic force acting force received by the shell is reduced, the reaction force received by the stator iron core formed by the lamination of the stator punching sheet 10 is effectively reduced, the stability of the stator iron core during rotation is improved, the iron loss during motor operation is reduced, and the performance efficiency of the motor is improved. In addition, the increase of the clearance between stator core and the motor casing can also increase the circulation passageway for the refrigerant, is favorable to using the miniaturized of compressor that has this motor, and has higher refrigerating output, also is favorable to reducing the noise of compressor simultaneously.

It should be noted that the outer wall of the curved section 121 is disposed in an arc shape. That is, the curved section 121 is a circular arc-shaped protrusion, and the radian of the circular arc is not particularly limited, and the representation form may be a protruding semicircle, a protruding semi-ellipse, or other protruding irregular arc structures, which are not particularly limited.

The curved section 121 is tangent to the extension of the circular arc section 110 and has a tangent point. Specifically, the distance from the arc segment 110 to the center of the stator plate 10 is set to R, where R is understood to be the radius of the stator yoke 100 without the buffer segment 120. The distance from the arc segment 110 to the center of the stator lamination 10 is set to R1, and the distance from the arc segment 110 to the center of the stator lamination 10 is identical to the maximum distance from the curve segment 121 to the center of the stator lamination 10, which means that r=r1, and the slight error generated during production between the two is ignored, and is also regarded as r=r1.

Since the outer wall surface of the curved section 121 is an arc surface, the maximum distance from the curved section 121 to the center of the stator lamination 10 is unique. Since R satisfies r=r1 and two arc segments 122 are respectively disposed on opposite sides of the curve segment 121, the surface of the stator yoke 100 when the outer peripheral surface is not provided with the buffer segment 120 is set as a full-circle surface 500, and the full-circle surface 500 referred to herein is a virtual surface, when R satisfies r=r1, it indicates that the curve segment 121 is tangent to the full-circle surface 500 and there is only one tangent point therebetween. The buffer section 120 of the outer peripheral wall of the stator yoke 100 is divided into the curve section 121 and the two arc sections 122, so that the stator fixed frequency of the stator punching sheet 10 can be adjusted, and the stator fixed frequency of a certain order is modulated into a plurality of different fixed frequencies, thereby avoiding resonance between the motor stator and other structures in the compressor when the motor works, reducing noise caused by high-frequency carrier waves and improving the use experience of users. Meanwhile, resonance in the motor is reduced, so that the service life of the product is further prolonged.

It should be noted that, since the plurality of buffer segments 120 are disposed on the outer peripheral wall surface of the stator yoke 100 at intervals, the stator yoke 100 is not a complete circular structure, and therefore, the stator punching sheet 10 is not a complete circular structure as a whole, and the circle center of the stator punching sheet 10 refers to the circle center when the buffer segments 120 are not disposed on the outer peripheral wall of the stator yoke 100, and the outer peripheral surface of the stator yoke 100 is a circle center when the circle is complete; after the buffer sections 120 are arranged on the outer peripheral wall of the stator yoke 100, the arrangement direction of the buffer sections is also arranged at intervals along the outer peripheral wall of the stator yoke 100, and the position of the circle center is not changed, so that the identification of the circle center is not affected.

According to the technical scheme of the utility model, the circular arc sections 110 and the buffer sections 120 are alternately arranged on the outer peripheral surface of the stator yoke 100 of the stator punching sheet 10, wherein the buffer sections 120 comprise a curve section 121 and two arc sections 122, the two arc sections 122 are positioned on two opposite sides of the curve section 121, the distance from the arc sections 122 to the center of the stator punching sheet 10 is smaller than the distance from the circular arc sections 110 to the center of the stator punching sheet 10, and the curve section 121 is tangent with the extension line of the circular arc sections 110 and has a tangent point. The stator fixed frequency of the stator punching sheet 10 can be adjusted, and the stator fixed frequency of a certain order is modulated into a plurality of different fixed frequencies, so that the motor stator and other structures in the compressor are prevented from generating resonance when the motor works, the noise caused by high-frequency carrier waves is reduced, and the use experience of a user is improved; meanwhile, resonance in the motor is reduced, so that the service life of the product is further prolonged.

Referring to fig. 1 to 3, in an embodiment, the stator lamination 10 further includes a plurality of stator teeth 200 connected to the stator yoke 100, the plurality of stator teeth 200 are spaced along the inner peripheral surface of the stator yoke 100, and the curved section 121 is located between two adjacent stator teeth 200.

Specifically, the stator teeth 200 are used to wind a stator coil, and a stator slot 300 for accommodating the coil is formed between any adjacent two of the stator teeth 200. The curved section 121 is located on the outer circumferential surface of the stator yoke 100, and the curved section 121 is located between two adjacent stator teeth 200 in the radial direction of the stator yoke 100, and further, the curved section 121 is located on the center line of the two adjacent stator teeth 200. In this way, the positions of the buffer segments 120 on the outer circumferential surface of the stator yoke 100 can be positioned by the positions of the curved segments 121, so that it is ensured that a plurality of buffer segments 120 can be arranged at equal intervals on the outer circumferential surface of the stator yoke 100. Meanwhile, when the stator lamination 10 is manufactured, two arc segments 122 may be punched with reference to the position of the curved segment 121.

Further, the two arc segments 122 may be respectively disposed on the central lines of the stator yokes 100 corresponding to the two adjacent stator teeth 200, so as to ensure the circulation of the electromagnetic field of the stator yoke 100 of the stator lamination 10, improve the motor efficiency, ensure the structural strength and rigidity of the stator lamination 10, and reduce the manufacturing cost.

Referring to fig. 1 to 3, in an embodiment, a stator slot 300 is formed between any two adjacent stator teeth 200, and the number of stator slots 300 is Q, so that Q is more than or equal to 9 and less than or equal to 15. Specifically, the number of the stator slots 300 may be 9, 10, 11, 12, 13, 14 or 15, which is a specific number of Q, to ensure the service performance of the motor. As shown in fig. 1, the number of the stator slots 300 is preferably set to 12.

With continued reference to fig. 1-3, in one embodiment, the circular arc segments 110 and/or the buffer segments 120 are equally spaced along the outer circumference of the stator yoke 100. Specifically, the circular arc segments 110 may be arranged at equal intervals along the outer peripheral surface of the stator yoke 100, the buffer segments 120 may be arranged at equal intervals along the outer peripheral surface of the stator yoke 100, and the circular arc segments 110 and the buffer segments 120 may be arranged at equal intervals along the outer peripheral surface of the stator yoke 100. So set up, on the one hand, the processing production of stator punching 10 of being convenient for, on the other hand, equidistant circular arc section 110 and/or buffer section 120 that set up are rationally distributed, have guaranteed the interior magnetic circuit structure of motor and the uniformity of the refrigerant volume through buffer section 120 to the performance and the efficiency of motor have been guaranteed.

It should be noted that the number of the circular arc segments 110 and/or the buffer segments 120 is 3-6. Specifically, when the number of the arc sections 110 and/or the buffer sections 120 is less than 3, most of the outer circumferential surface of the stator yoke 100 is connected with the motor housing, the vibration transmitted to the housing is larger, the natural frequency of the housing cannot be staggered from the working frequency of the motor during working, and the gap between the stator yoke 100 and the housing is smaller, so that resonance is easy to occur, the heat dissipation effect is poor, noise is increased, the service life of the motor is shortened, the performance efficiency of the motor is reduced, and the use experience of a user is reduced; when the number of the arc sections 110 and/or the buffer sections 120 is greater than 6, the structural stability of the stator punching sheet 10 is easily affected, so that the stability of the motor during operation is affected, the performance efficiency of the motor is reduced, the noise is increased, and the use experience of a user is reduced. Therefore, the number of the circular arc sections 110 and/or the buffer sections 120 is set to 3-6, so that most of the outer peripheral surface of the stator yoke 100 can be reliably separated from the inner wall of the motor housing, and vibration transmitted to the housing can be reduced, resonance is effectively avoided, noise is reduced, meanwhile, the magnetic circuit structure from the stator teeth 200 to the stator yoke 100 is optimized, the stability of the stator core during rotation is improved, the iron loss of the motor during operation is reduced, and the performance efficiency of the motor is improved. The number of the circular arc segments 110 may be 3, 4, 5, and 6, and the number of the buffer segments 120 may be 3, 4, 5, and 6. As shown in fig. 1, the number of the circular arc segments 110 and/or the buffer segments 120 is preferably 4.

In one embodiment, the distance from the arc segment 110 to the center of the stator lamination 10 is R, which is 42 mm. Ltoreq.R.ltoreq.75 mm. Specifically, R is the distance from the arc segment 110 to the center of the stator plate 10, where R is understood to be the radius of the stator yoke 100 without the buffer segment 120, i.e., the radius of the stator plate 10. When the distance R from the circular arc segment 110 to the center of the stator lamination 10 is 42mm or more and is 75mm or less, the service performance and efficiency of the motor can be ensured, and the reduction of the service performance and efficiency of the motor caused by the overlarge or undersize radius of the stator lamination 10 is avoided. The value of R can be 42mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm and 75mm. Preferably, the maximum distance R from the outer circumferential surface of the stator yoke 100 to the center of the stator lamination 10 satisfies 45 mm.ltoreq.R.ltoreq.65 mm.

Generally, at 60rps and 90rps, the carrier noise of the compressor 5000hz is as follows: the ratio of the stator slot number of the stator core to the number of rotor core stages is set to 12:8, the distance R from the outer peripheral surface of the stator yoke 100 to the center of the stator lamination 10 was set to 55mm and 40mm for comparison, and the measured data were as follows:

TABLE 1-1 Carrier noise value for compressor 5000hz

As can be obtained from the above table data, the carrier noise value of the compressor at 5000hz is 12:8, when the distance R from the outer peripheral surface of the stator yoke 100 to the center of the stator lamination 10 is 55mm, the noise reduction effect of the compressor is more remarkable at 60rps/dB and 90 rps/dB. When the distance R from the outer peripheral surface of the stator yoke 100 to the center of the stator lamination 10 is 40mm, the carrier noise is not significantly improved in the range of 42mm to 75mm.

Further, the carrier noise of compressor 6300hz is shown in the following table: the ratio of the stator slot number of the stator core to the number of rotor core stages is set to 12:8, the distance R from the outer peripheral surface of the stator yoke 100 to the center of the stator lamination 10 was set to 55mm and 40mm for comparison, and the measured data were as follows:

TABLE 1-2 Carrier noise value for compressor 6300hz

As can be seen from the above table data, the carrier noise value of the compressor 6300hz is 12 when the ratio of the stator core stator slot number to the rotor core stage number is: 8, when the distance R from the outer peripheral surface of the stator yoke 100 to the center of the stator lamination 10 is 55mm, the noise reduction effect of the compressor is more remarkable at 60rps/dB and 90 rps/dB. When the distance R from the outer peripheral surface of the stator yoke 100 to the center of the stator lamination 10 is 40mm, the carrier noise is not significantly improved in the range of 42mm to 75mm.

The utility model also provides a stator core, which comprises a plurality of stator punching sheets, wherein each stator punching sheet is arranged in a lamination manner along the axial direction of the stator punching sheet. The stator core adopts all the technical schemes of all the embodiments, so that the stator core has at least all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.

The utility model also provides a motor which comprises the stator core. The specific structure of the stator core refers to the above embodiments, and since the motor adopts all the technical solutions of all the embodiments, the stator core at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein. In one embodiment, the motor comprises a stator core and a rotor core which are matched with each other, and the ratio of the number of slots of the motor to the number of stages of the rotor is 3:2 or 6:5.

the utility model also provides a compressor which comprises the motor, and the stator punching sheets are arranged in a lamination mode along the axial direction of the stator punching sheets. The specific structure of the stator punching sheet refers to the above embodiments, and because the compressor adopts all the technical solutions of all the embodiments, the compressor has at least all the beneficial effects brought by the technical solutions of the embodiments, and the description is omitted herein. According to the definition of relevant parameters of stator punching sheets in a motor, the noise pair of the compressor and a comparison model is shown in a graph in fig. 4 at 60rps, and the noise pair of the compressor and the comparison model is shown in a graph in fig. 5 at 90rps, so that the performance of the compressor is obviously superior to that of the comparison model.

The utility model also provides refrigeration equipment which comprises the compressor, and the stator punching sheets are arranged in a pressing mode along the axial direction of the stator punching sheets. The specific structure of the stator punching sheet refers to the above embodiments, and because the refrigeration equipment adopts all the technical schemes of all the embodiments, the refrigeration equipment at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (15)

1. The stator punching sheet is characterized by comprising a stator yoke, wherein the outer peripheral surface of the stator yoke is alternately provided with an arc section and a buffer section, the buffer section comprises a curve section and two arc sections, the two arc sections are positioned on two opposite sides of the curve section, the distance from the arc section to the center of the stator punching sheet is smaller than the distance from the arc section to the center of the stator punching sheet, and the curve section is tangent to an extension line of the arc section and has a tangent point.

2. The stator lamination of claim 1, further comprising a plurality of stator teeth coupled to the stator yoke, the plurality of stator teeth being spaced along an inner peripheral surface of the stator yoke, the curvilinear segment being positioned between adjacent two of the stator teeth.

3. The stator plate of claim 2 wherein said curvilinear segments are located on the midlines of adjacent two of said stator teeth.

4. A stator punching sheet according to claim 3, characterized in that stator slots are formed between any adjacent two of the stator teeth, the number of the stator slots being Q, and Q being 9-15 being satisfied.

5. The stator plate of claim 4 wherein Q is equal to 12.

6. Stator punching sheet according to any of claims 1 to 5, characterized in that the circular arc segments and/or the buffer segments are arranged at equal intervals along the outer circumferential surface of the stator yoke.

7. Stator punching sheet according to claim 6, characterised in that the number of the circular arc segments and/or the buffer segments is 3-6.

8. Stator punching sheet according to claim 7, characterized in that the number of the circular arc segments and/or the buffer segments is 4.

9. The stator punching sheet according to any of claims 1 to 5, characterized in that the distance from the circular arc section to the center of the stator punching sheet is R, satisfying 42mm r.ltoreq.75 mm.

10. The stator plate of claim 9 wherein R is 45mm or less and 65mm or less.

11. A stator core comprising a plurality of stator laminations according to any one of claims 1 to 10, a plurality of said stator laminations being arranged in axial lamination with respect to said stator laminations.

12. An electric machine comprising the stator core of claim 11.

13. The motor of claim 12, wherein the motor comprises a stator core and a rotor core that are mated with each other, and wherein a ratio of a number of stator slots of the stator core to a number of stages of the rotor core is 3:2 or 6:5.

14. a compressor comprising the motor of claim 12.

15. A refrigeration apparatus comprising the compressor of claim 14.