Stator core, motor and compressor

Abstract

The utility model relates to a stator core, a motor and a compressor, the stator core comprises an annular stator yoke, the inner circumference of the stator yoke is provided with a plurality of stator teeth at intervals along the circumferential direction, and a stator winding groove is formed between any two adjacent stator teeth; a plurality of refrigerant grooves are formed in the outer circumference of the stator yoke along the circumferential direction at intervals; the maximum groove width of the refrigerant groove is h, the width of the stator yoke is H, and the relationship between h and H is that h is less than or equal to H / 2; the area of the cross section of the refrigerant groove is S, the outer diameter of the stator yoke is R, and the relation between S and R is that S / (pi * R2) is larger than or equal to 4.0% and smaller than or equal to 5.0%. On the basis that the strength of the stator core is ensured to be sufficient, the deformation of the stator core is reduced, and the circulation efficiency of a refrigerant is effectively improved, so that the energy efficiency exertion of the compressor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field especially a kind of stator core, motor and compressor. BACKGROUND

[0002] The compressor has a compression unit and a motor, the compression unit is used to compress refrigerant, and the motor provides driving force to the compression unit when power is applied. When the stator of the motor is assembled with the compressor housing, the outer diameter of the stator is welded and fixed with the inner diameter of the compressor housing, and a channel for the flow of refrigerant is provided on the outer diameter of the stator. When the channel of the stator outer diameter is improperly designed, not only can it cause the stator to be insufficient in strength and deform, but also can cause the oil discharge of the compressor to increase and cause the flow of refrigerant to be not smooth, thereby seriously affecting the performance of the compressor. SUMMARY

[0003] Therefore, the utility model aims at ensuring the strength of the stator core is enough, reducing the deformation of the stator core, and effectively improving the flow efficiency of the refrigerant, thereby improving the performance of the compressor.

[0004] In order to achieve the above-mentioned purpose, the utility model embodiment first aspect provides a kind of stator core, including the stator yoke of annular, the inner circumference of the stator yoke is interval and is provided with a plurality of stator teeth in circumferential direction, and the stator winding slot is formed between any two adjacent stator teeth;The outer circumference of the stator yoke is interval and is provided with a plurality of refrigerant grooves in circumferential direction, and the two ends of the refrigerant groove are respectively penetrated through the two ends of the stator yoke, and the center of the refrigerant groove in circumferential direction is configured on the straight line passing through the center of the stator tooth in circumferential direction and the center of the stator yoke;

[0005] The refrigerant groove is recessed radially towards the inside of the outer circumferential surface of the stator yoke, the maximum groove width of the refrigerant groove is h, the width of the stator yoke is H, and the relationship between h and H is h≤H / 2;

[0006] The cross-sectional area of the refrigerant groove is S, the outer diameter of the stator yoke is R, and the relationship between S and R is 4.0%≤S / (π*R 2 )≤5.0%.

[0007] Therefore, according to the stator core of the embodiment of the utility model, through adopting annular stator yoke, and multiple stator teeth which are arranged on the inner circumference of the stator yoke in the circumferential direction and form stator slots between any two adjacent stator teeth, multiple refrigerant grooves which penetrate through both ends of the stator yoke are arranged on the outer circumference of the stator yoke in the circumferential direction, the maximum groove width of the refrigerant groove is h, the width of the stator yoke is H, the relationship between h and H satisfies: h<=H / 2; in addition, the cross-sectional area of the refrigerant groove is S, the outer diameter of the stator yoke is R, the relationship between S and R satisfies: 4.0%<=S / (pi*R 2 ) <=5.0%; that is to say, the utility model discloses the maximum groove width of the refrigerant groove is reasonably designed, when the maximum groove width of the refrigerant groove is less than or equal to half of the width of the stator yoke, the strength of the stator yoke can be ensured to be good, and deformation is not prone to occurring; and the utility model discloses the cross-sectional area of the refrigerant groove is reasonably designed, when the value range of S / (pi*R 2 ) is 4.0% to 5.0%, the flow ratio of the refrigerant of the stator core can be improved; therefore, according to the stator core of the embodiment of the utility model, through reasonable design of the refrigerant groove, on the basis of ensuring the strength of the stator yoke, the flow efficiency of the refrigerant can be effectively increased, so that the energy efficiency of the compressor can be improved.

[0008] As an implementation manner, the shortest distance between the refrigerant groove and the stator winding slot adjacent to the refrigerant groove is D, and the relationship of the D is: 4.8mm<=D<=5.8mm. By adopting such a structure design, when the value range of the D is 4.8mm to 5.8mm, the strength of the stator core can be ensured to be sufficient, and the deformation problem caused by the insufficient strength of the stator core due to the too small shortest distance between the refrigerant groove and the stator winding slot can be avoided.

[0009] As an implementation manner, the central angle formed by the two sides of the refrigerant groove in the circumferential direction and the center of the stator yoke is beta, and the relationship of the beta is: 10<=beta<=20. By adopting such a structure design, when the value range of the beta is 10 to 20, the flow efficiency of the refrigerant of the stator core can be ensured, and the refrigerant groove will not occupy too much of the contact surface between the stator yoke and the compressor shell, so that the combination between the stator yoke and the compressor shell is firm and reliable.

[0010] As an implementation manner, the number of the refrigerant grooves is m, the number of the stator winding slots is n, and the relationship between the m and the n is: m=n or m=n / 2.

[0011] As an implementation form, the refrigerant groove comprises a first recessed area and a second recessed area, the first recessed area is arranged on a first circle, and the radius of the first circle is smaller than the outer diameter of the stator yoke; the second recessed area is recessed inward along the radial direction in the center of the first recessed area, and the second recessed area is arranged on a second circle, and the radius of the second circle is smaller than the radius of the first circle.

[0012] As an implementation form, the profile line of the second recessed area recessed inward along the radial direction in the center of the first recessed area is a circular arc line.

[0013] As an implementation form, the cross-sectional shape of the second recessed area is a U-shaped.

[0014] As an implementation form, on the outer circle of the stator yoke, a joint part is formed between any two adjacent refrigerant grooves, and the joint part is combined with the inner circle of the compressor shell in a surface contact manner.

[0015] The second aspect of the embodiment of the utility model provides a motor, comprising the stator core of any one of the above embodiments. According to the motor of the utility model embodiment, on the basis of ensuring that the strength of the stator core is enough, the deformation of the stator core is reduced, and the flow efficiency of refrigerant is effectively improved, so that the energy efficiency of the compressor is improved.

[0016] The third aspect of the embodiment of the utility model provides a compressor, comprising the motor of any one of the above embodiments. According to the compressor of the utility model embodiment, on the basis of ensuring that the strength of the stator core is enough, the deformation of the stator core is reduced, and the flow efficiency of refrigerant is effectively improved, so that the energy efficiency of the compressor is improved.

[0017] In order to better understand and implement, the utility model is described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is one of the structural schematic diagram of the stator core of the embodiment of the utility model;

[0019] Figure 2 It is the second structural schematic diagram of the stator core of the embodiment of the utility model;

[0020] Figure 3 It is Figure 2 It is the enlarged schematic view of A part shown in the figure;

[0021] Figure 4 It is the third structural schematic diagram of the stator core of the embodiment of the utility model;

[0022] Figure 5 It is the fourth structural schematic diagram of the stator core of the embodiment of the utility model;

[0023] Figure 6 For Figure 5 An enlarged schematic view of the B part shown.

[0024] Reference signs:

[0025] 100, stator core; 110, stator yoke; 120, stator tooth; 130, stator winding slot; 140, refrigerant groove; 141, first recessed area; 142, second recessed area. DETAILED DESCRIPTION

[0026] To further illustrate the embodiments, the utility model provides the drawings. These drawings are part of the utility model disclosure, which is mainly used to illustrate the embodiments, and can be combined with the related description of the specification to explain the operating principle of the embodiments. With reference to these contents, those skilled in the art should understand other possible implementations and the advantages of the utility model.

[0027] In the related art, the compressor has a compression part and a motor, the compression part is used for compressing refrigerant, and the motor provides driving force to the compression part when power is applied. When the stator of the motor is assembled with the compressor housing, the outer diameter of the stator is welded and fixed with the inner diameter of the compressor housing, and a channel for the flow of refrigerant is provided on the outer diameter of the stator. When the channel of the outer diameter of the stator is improperly designed, not only will the strength of the stator be insufficient to cause deformation, but also the oil discharge amount of the compressor will increase, causing the flow of refrigerant to be not smooth, thereby seriously affecting the performance of the compressor.

[0028] Therefore, the utility model embodiment provides a kind of stator core 100, motor and compressor, according to the stator core 100, motor and compressor of the utility model embodiment, on the basis of ensuring that the strength of stator core 100 is enough, reduce the deformation of stator core 100, and effectively improve the flow efficiency of refrigerant, to improve the performance of the compressor.

[0029] Please refer to Figures 1 to 6;The utility model discloses a stator core 100, including the ring of stator yoke 110, the inside circumference of stator yoke 110 is provided with a plurality of stator tooth 120 along the circumferential direction interval, and the stator winding slot 130 is formed between any two adjacent stator tooth 120, the outside circumference of stator yoke 110 is provided with a plurality of refrigerant grooves 140 along the circumferential direction interval, and the both ends of refrigerant groove 140 respectively penetrate the both ends of stator yoke 110, and the center of refrigerant groove 140 along the circumferential direction is configured on the straight line through the center of stator tooth 120 along the circumferential direction and the center of stator yoke 110, and refrigerant groove 140 is recessed to the inside in the radial direction on the outside circumferential surface of stator yoke 110, and the maximum groove width of refrigerant groove 140 is h, and the width of stator yoke 110 is H, and the relation of h and H is: h≤H / 2, the cross -sectional area of refrigerant groove 140 is S, and the outer diameter of stator yoke 110 is R, and the relation of S and R is: 4.0%≤S / (π*R 2 )≤5.0%.

[0030] Among them, on the outside circumference of stator yoke 110, the combining part is formed between any two adjacent refrigerant grooves 140, and the combining part is combined with the inside circumference of compressor housing in the way of surface contact.

[0031] Therefore, according to the stator core 100 of the utility model embodiment, by adopting the ring of stator yoke 110, and a plurality of stator tooth 120 being arranged on the inside circumference of stator yoke 110 along the circumferential direction interval and the stator slot being formed between any two adjacent stator tooth 120, the outside circumference of stator yoke 110 is provided with a plurality of refrigerant grooves 140 penetrating the both ends of stator yoke 110 along the circumferential direction, and the maximum groove width of refrigerant groove 140 is set as h, and the width of stator yoke 110 is H, and the relation of h and H satisfies: h≤H / 2, in addition, the cross -sectional area of refrigerant groove 140 is S, and the outer diameter of stator yoke 110 is R, and the relation of S and R satisfies 4.0%≤S / (π*R 2 )≤5.0%; that is to say, the utility model passes through the reasonable design to the maximum groove width of refrigerant groove 140, and when the value range of the maximum groove width of refrigerant groove 140 is less than or equal to half of the width of stator yoke 110, can ensure that the strength of stator yoke 110 remains good, and is not prone to deformation, and the utility model passes through the reasonable design to the cross -sectional area of refrigerant groove 140, and when the value range of S / (π*R 2 ) is 4.0% to 5.0%, the flow ratio of refrigerant of stator core 100 can be improved, and therefore, according to the stator core 100 of the utility model embodiment, through the reasonable design of refrigerant groove 140, on the basis of ensuring the strength of stator yoke 110, the flow efficiency of refrigerant can be effectively increased, thereby improving the energy efficiency of compressor.

[0032] Optionally, in some embodiments of the utility model, the shortest distance between refrigerant groove 140 and its adjacent stator winding slot 130 is D, and the relationship of D is: 4.8mm≤D≤5.8mm. It can be understood that in these embodiments, when the value range of D is 4.8mm to 5.8mm, it can ensure that the strength of stator core 100 is sufficient, and avoid the deformation problem caused by the insufficient strength of stator core 100 due to the too small shortest distance between refrigerant groove 140 and stator winding slot 130.

[0033] Optionally, in some embodiments of the utility model, the central angle formed by the two sides of refrigerant groove 140 along the circumferential direction and the center of stator yoke 110 is β, and the relationship of β is: 10°≤β≤20°. It can be understood that in these embodiments, when the value range of β is 10° to 20°, it can not only ensure the flow efficiency of refrigerant of stator core 100, but also not occupy too much of the contact surface between stator yoke 110 and compressor shell, ensuring that the combination between stator yoke 110 and compressor shell is firm and reliable.

[0034] Optionally, in some embodiments of the utility model, the number of refrigerant grooves 140 is m, the number of stator winding slots 130 is n, and the relationship of m and n is: m=n. It can be understood that in these embodiments, the number of refrigerant grooves 140 is equal to the number of stator winding slots 130, and the refrigerant grooves 140 are distributed equidistantly in the circumferential direction, that is, each radial outer side of the stator tooth 120 is provided with a refrigerant groove 140.

[0035] Optionally, in some embodiments of the utility model, the number of refrigerant grooves 140 is m, the number of stator winding slots 130 is n, and the relationship of m and n is: m=n / 2. It can be understood that in these embodiments, the number of refrigerant grooves 140 is half of the number of stator winding slots 130, and the refrigerant grooves 140 are distributed equidistantly in the circumferential direction, that is, among any two adjacent stator teeth 120, only the radial outer side of one stator tooth 120 is distributed with refrigerant groove 140, and the radial outer side of the other stator tooth 120 is not distributed with refrigerant groove 140.

[0036] Optionally, in some embodiments of this utility model, the refrigerant groove 140 includes a first recessed area 141 and a second recessed area 142. The first recessed area 141 is disposed on a first circumference, the radius of which is smaller than the outer diameter of the stator yoke 110. The second recessed area 142 is recessed radially inward at the center of the first recessed area 141, and is disposed on a second circumference, the radius of which is smaller than the radius of the first circumference. In these embodiments, the outline of the second recessed area 142 recessed radially inward at the center of the first recessed area 141 is an arc. It is worth understanding that in these embodiments, the second recessed area 142 of some refrigerant grooves 140 may also have a U-shaped cross-section.

[0037] Optionally, in some embodiments of this utility model, the refrigerant groove 140 includes a first recessed area 141 and a second recessed area 142. The first recessed area 141 is disposed on a first circumference, the radius of which is smaller than the outer diameter of the stator yoke 110. The second recessed area 142 is recessed radially inward at the center of the first recessed area 141, and is disposed on a second circumference, the radius of which is smaller than the radius of the first circumference. In these embodiments, the cross-sectional shape of the second recessed area 142 is U-shaped. It is worth understanding that in these embodiments, the outline of the second recessed area 142 of some refrigerant grooves 140 that is recessed radially inward at the center of the first recessed area 141 may also be an arc.

[0038] The following is for reference. Figures 1 to 4 The stator core 100 according to an optional embodiment of the present invention is described in detail below. It is worth understanding that the following description is merely illustrative and should not be construed as a limitation on the stator core 100 of the present invention.

[0039] This embodiment provides a stator core 100, including an annular stator yoke 110. Multiple stator teeth 120 are spaced circumferentially along the inner circumference of the stator yoke 110, and a stator winding groove 130 is formed between any two adjacent stator teeth 120. Multiple refrigerant grooves 140 are spaced circumferentially along the outer circumferential circumference of the stator yoke 110, with both ends of each groove penetrating both ends of the stator yoke 110. The center of each refrigerant groove 140 is located on a straight line passing through the center of the stator teeth 120 and the center of the stator yoke 110. The refrigerant grooves 140 are radially recessed inwards on the outer circumferential surface of the stator yoke 110. The maximum groove width of the refrigerant groove 140 is h, and the width of the stator yoke 110 is H. The relationship between h and H is: h = H / 2. The cross-sectional area of ​​the refrigerant groove 140 is S, and the outer diameter of the stator yoke 110 is R. The relationship between S and R is: S / (π*R). 2 =4.0%.

[0040] Wherein, the number of the refrigerant grooves 140 in the embodiment is equal to the number of the stator winding grooves 130, and the plurality of refrigerant grooves 140 are distributed equidistantly in the circumferential direction, and it can be understood that one refrigerant groove 140 is arranged on the radially outer side of each stator tooth 120. On the outer circumference of the stator yoke 110, a joint is formed between any two adjacent refrigerant grooves 140, and the joint is combined with the inner circumference of the compressor shell in a surface contact manner.

[0041] Further, in the embodiment, the shortest distance between the refrigerant groove 140 and the adjacent stator winding groove 130 is D, and the relationship of D is: D=4.8mm. In addition, the central angle of the circle formed by the two sides of the refrigerant groove 140 in the circumferential direction and the center of the stator yoke 110 is β, and the relationship of β is: β=10°.

[0042] In addition, in the embodiment, the refrigerant groove 140 includes a first recessed area 141 and a second recessed area 142, the first recessed area 141 is arranged on a first circumference, and the radius of the first circumference is smaller than the outer diameter of the stator yoke 110; the second recessed area 142 is recessed inward along the radial direction in the center of the first recessed area 141, and the second recessed area 142 is arranged on a second circumference, and the radius of the second circumference is smaller than the radius of the first circumference. Wherein, the profile line of the second recessed area 142 recessed inward along the radial direction in the center of the first recessed area 141 is a circular arc line.

[0043] Therefore, the stator core 100 in the embodiment, by adopting the annular stator yoke 110, the plurality of stator teeth 120 arranged at intervals in the circumferential direction on the inner circumference of the stator yoke 110, and the stator slot formed between any two adjacent stator teeth 120, a plurality of refrigerant grooves 140 penetrating through both ends of the stator yoke 110 are arranged on the outer circumference of the stator yoke 110 in the circumferential direction, the maximum groove width of the refrigerant groove 140 is h, the width of the stator yoke 110 is H, and the relationship of h and H satisfies: h=H / 2; in addition, the cross-sectional area of the refrigerant groove 140 is S, the outer diameter of the stator yoke 110 is R, and the relationship of S and R satisfies: S / (π*R 2 )=4.0%; that is, by reasonably designing the maximum groove width of the refrigerant groove 140, when the maximum groove width of the refrigerant groove 140 is equal to half of the width of the stator yoke 110, the strength of the stator yoke 110 can be ensured to be good and deformation is not easy to occur; and by reasonably designing the cross-sectional area of the refrigerant groove 140, S / (π*R 2When the value of the shortest distance D between the refrigerant groove 140 and the stator winding slot 130 adjacent to the refrigerant groove 140 is 4.0%, the flow ratio of the refrigerant in the stator core 100 can be improved; when the value of the shortest distance D between the refrigerant groove 140 and the stator winding slot 130 adjacent to the refrigerant groove 140 is 4.8 mm, the strength of the stator core 100 can be ensured to be sufficient, and the deformation problem caused by the insufficient strength of the stator core 100 due to the too small shortest distance between the refrigerant groove 140 and the stator winding slot 130 can be avoided; in addition, when the value of the central angle β formed between the two sides of the refrigerant groove 140 in the circumferential direction and the center of the stator yoke 110 is 10°, the flow efficiency of the refrigerant in the stator core 100 can be ensured, and the refrigerant groove 140 will not occupy too much of the contact surface between the stator yoke 110 and the compressor shell, so that the combination between the stator yoke 110 and the compressor shell is firm and reliable. It can be understood that, according to the stator core 100 of the embodiment, through the reasonable design of the refrigerant groove 140, on the basis of ensuring that the strength of the stator yoke 110 and the stator core 100 is sufficient, not only the firmness of the combination between the stator core 100 and the compressor shell can be ensured, but also the flow efficiency of the refrigerant can be effectively increased, so that the energy efficiency of the compressor is improved.

[0044] Reference will now be made to Figure 5 and Figure 6 The stator core 100 according to an optional embodiment of the utility model is described in detail, and it should be understood that the following description is only exemplary and cannot be understood as a limitation of the stator core 100 of the utility model.

[0045] The stator core 100 provided by the embodiment comprises a stator yoke 110 in a ring shape, a plurality of stator teeth 120 are arranged on the inner circumference of the stator yoke 110 and spaced apart in the circumferential direction, and a stator winding slot 130 is formed between any two adjacent stator teeth 120; a plurality of refrigerant grooves 140 are arranged on the outer circumference of the stator yoke 110 and spaced apart in the circumferential direction, the two ends of the refrigerant groove 140 respectively penetrate the two ends of the stator yoke 110, and the center of the refrigerant groove 140 in the circumferential direction is arranged on a straight line passing through the center of the stator tooth 120 in the circumferential direction and the center of the stator yoke 110; the refrigerant groove 140 is recessed radially towards the inside of the outer circumferential surface of the stator yoke 110, the maximum groove width of the refrigerant groove 140 is h, the width of the stator yoke 110 is H, and the relationship between h and H is h=H / 3; the cross-sectional area of the refrigerant groove 140 is S, the outer diameter of the stator yoke 110 is R, and the relationship between S and R is S / (π*R 2 )=4.5%.

[0046] In the embodiment, the number of the refrigerant grooves 140 is half of the number of the stator winding grooves 130, and the refrigerant grooves 140 are distributed equidistantly in the circumferential direction. It can be understood that, in any two adjacent stator teeth 120, only one of the stator teeth 120 has the refrigerant groove 140 distributed on the radially outer side, and the other stator tooth 120 has no refrigerant groove 140 distributed on the radially outer side. On the outer circumference of the stator yoke 110, a joint is formed between any two adjacent refrigerant grooves 140, and the joint is combined with the inner circumference of the compressor shell in a surface contact manner.

[0047] Further, in the embodiment, the shortest distance D between the refrigerant groove 140 and the adjacent stator winding groove 130 is 5.3 mm. In addition, the central angle β formed between the two sides of the refrigerant groove 140 in the circumferential direction and the center of the stator yoke 110 is 15°.

[0048] In addition, in the embodiment, the refrigerant groove 140 includes a first recessed area 141 and a second recessed area 142. The first recessed area 141 is arranged on a first circumference, and the radius of the first circumference is smaller than the outer diameter of the stator yoke 110. The second recessed area 142 is recessed inward along the radial direction in the center of the first recessed area 141, and the second recessed area 142 is arranged on a second circumference, and the radius of the second circumference is smaller than the radius of the first circumference. The cross-sectional shape of the second recessed area 142 is U-shaped.

[0049] Therefore, in the embodiment, the stator core 100 adopts the annular stator yoke 110, the plurality of stator teeth 120 arranged at intervals in the circumferential direction on the inner circumference of the stator yoke 110, and the stator slot formed between any two adjacent stator teeth 120. The outer circumference of the stator yoke 110 is provided with a plurality of refrigerant grooves 140 penetrating through both ends of the stator yoke 110 in the circumferential direction. The maximum groove width of the refrigerant groove 140 is h, the width of the stator yoke 110 is H, and the relationship between h and H satisfies h=H / 3. In addition, the cross-sectional area of the refrigerant groove 140 is S, the outer diameter of the stator yoke 110 is R, and the relationship between S and R satisfies S / (π*R 2 ). That is, the maximum groove width of the refrigerant groove 140 is reasonably designed, and the value of the maximum groove width of the refrigerant groove 140 is equal to half of the width of the stator yoke 110, so that the strength of the stator yoke 110 can be maintained well and deformation is not easy to occur. In addition, the cross-sectional area of the refrigerant groove 140 is reasonably designed, and the relationship between S and R 2When the value of the shortest distance D between the refrigerant groove 140 and the stator winding slot 130 adjacent to the refrigerant groove 140 is 5.3 mm, the strength of the stator core 100 can be ensured to be sufficient, and the deformation problem caused by the insufficient strength of the stator core 100 due to the too small shortest distance between the refrigerant groove 140 and the stator winding slot 130 can be avoided; in addition, when the value of the central angle β formed between the two sides of the refrigerant groove 140 along the circumferential direction and the center of the stator yoke 110 is 15°, the refrigerant flow efficiency of the stator core 100 can be ensured, and the refrigerant groove 140 will not occupy too much of the contact surface between the stator yoke 110 and the compressor shell, so that the combination between the stator yoke 110 and the compressor shell is firm and reliable; it can be understood that, according to the stator core 100 of the embodiment, through the reasonable design of the refrigerant groove 140, on the basis of ensuring that the strength of the stator yoke 110 and the stator core 100 is sufficient, not only the firmness of the combination between the stator core 100 and the compressor shell can be ensured, but also the refrigerant flow efficiency can be effectively increased, so that the energy efficiency of the compressor is improved.

[0050] Reference will be made to the following Figures 1 to 4 The stator core 100 according to an optional embodiment of the present application will be described in detail, and it should be understood that the following description is only exemplary and cannot be understood as a limitation of the stator core 100 of the present application.

[0051] The present embodiment provides a stator core 100, which comprises a stator yoke 110 in a ring shape, a plurality of stator teeth 120 are arranged on the inner circumference of the stator yoke 110 and spaced apart along the circumferential direction, and a stator winding slot 130 is formed between any two adjacent stator teeth 120; a plurality of refrigerant grooves 140 are arranged on the outer circumference of the stator yoke 110 and spaced apart along the circumferential direction, the two ends of the refrigerant groove 140 respectively penetrate the two ends of the stator yoke 110, and the center of the refrigerant groove 140 along the circumferential direction is arranged on a straight line passing through the center of the stator tooth 120 along the circumferential direction and the center of the stator yoke 110; the refrigerant groove 140 is recessed radially towards the inside of the outer circumferential surface of the stator yoke 110, the maximum groove width of the refrigerant groove 140 is h, the width of the stator yoke 110 is H, and the relationship between h and H is: h = H / 2; the cross-sectional area of the refrigerant groove 140 is S, the outer diameter of the stator yoke 110 is R, and the relationship between S and R is: S / (π*R 2 ) = 5.0%.

[0052] Wherein, the number of the refrigerant grooves 140 in the embodiment is equal to the number of the stator winding grooves 130, and the plurality of refrigerant grooves 140 are distributed equidistantly in the circumferential direction, and it can be understood that one refrigerant groove 140 is arranged on the radially outer side of each stator tooth 120. On the outer circumference of the stator yoke 110, a joint is formed between any two adjacent refrigerant grooves 140, and the joint is combined with the inner circumference of the compressor shell in a surface contact manner.

[0053] Further, in the embodiment, the shortest distance between the refrigerant groove 140 and the adjacent stator winding groove 130 is D, and the relationship of D is: D=5.8mm. In addition, the central angle of the circle formed by the two sides of the refrigerant groove 140 in the circumferential direction and the center of the stator yoke 110 is β, and the relationship of β is: β=20°.

[0054] In addition, in the embodiment, the refrigerant groove 140 includes a first recessed area 141 and a second recessed area 142, the first recessed area 141 is arranged on a first circumference, and the radius of the first circumference is smaller than the outer diameter of the stator yoke 110; the second recessed area 142 is recessed inward along the radial direction in the center of the first recessed area 141, and the second recessed area 142 is arranged on a second circumference, and the radius of the second circumference is smaller than the radius of the first circumference. Wherein, the profile line of the second recessed area 142 recessed inward along the radial direction in the center of the first recessed area 141 is a circular arc line.

[0055] Therefore, the stator core 100 in the embodiment, by adopting the annular stator yoke 110, the plurality of stator teeth 120 arranged at intervals in the circumferential direction on the inner circumference of the stator yoke 110, and the stator slot formed between any two adjacent stator teeth 120, the plurality of refrigerant grooves 140 penetrating through both ends of the stator yoke 110 are arranged on the outer circumference of the stator yoke 110 in the circumferential direction, the maximum groove width of the refrigerant groove 140 is h, the width of the stator yoke 110 is H, and the relationship of h and H satisfies: h=H / 2; in addition, the cross-sectional area of the refrigerant groove 140 is S, the outer diameter of the stator yoke 110 is R, and the relationship of S and R satisfies: S / (π*R 2 )=5.0%; that is, the maximum groove width of the refrigerant groove 140 is equal to half of the width of the stator yoke 110, which can ensure that the strength of the stator yoke 110 remains good and is not easy to deform; and the cross-sectional area of the refrigerant groove 140 is reasonably designed, and S / (π*R 2When the value of the shortest distance D between the refrigerant groove 140 and the stator winding slot 130 adjacent to the refrigerant groove 140 is 5.8 mm, the strength of the stator core 100 can be ensured to be sufficient, and deformation of the stator core 100 caused by insufficient strength of the stator core 100 due to the too small shortest distance between the refrigerant groove 140 and the stator winding slot 130 can be avoided; in addition, when the value of the central angle β formed between the two sides of the refrigerant groove 140 in the circumferential direction and the center of the stator yoke 110 is 20°, the refrigerant flow efficiency of the stator core 100 can be ensured, and the contact surface between the stator yoke 110 and the compressor shell cannot be occupied too much, so that the combination between the stator yoke 110 and the compressor shell is firm and reliable; it can be understood that, according to the stator core 100 of the embodiment, by reasonably designing the refrigerant groove 140, on the basis of ensuring that the strength of the stator yoke 110 and the stator core 100 is sufficient, not only the firmness of the combination between the stator core 100 and the compressor shell can be ensured, but also the refrigerant flow efficiency can be effectively increased, so that the energy efficiency of the compressor is improved.

[0056] The utility model embodiment second aspect provides a kind of motor, including the stator core 100 of any embodiment described above. According to the motor of the utility model embodiment, on the basis of ensuring that the strength of the stator core 100 is sufficient, the deformation of the stator core 100 is reduced, and the refrigerant flow efficiency is effectively improved, so that the energy efficiency of the compressor is improved.

[0057] The utility model embodiment third aspect provides a kind of compressor, including the motor of any embodiment described above. According to the compressor of the utility model embodiment, on the basis of ensuring that the strength of the stator core 100 is sufficient, the deformation of the stator core 100 is reduced, and the refrigerant flow efficiency is effectively improved, so that the energy efficiency of the compressor is improved.

[0058] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model.

[0059] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model stator core 100, motor and compressor range. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, several modifications and improvements can be made, which belong to the protection scope of the utility model.

Claims

1.A stator core, characterized in that: a stator yoke in a ring shape, a plurality of stator teeth are arranged on an inner circumference of the stator yoke at intervals in a circumferential direction, and a stator winding slot is formed between any two adjacent stator teeth; a plurality of refrigerant grooves are arranged on an outer circumference of the stator yoke at intervals in the circumferential direction, and both ends of each refrigerant groove penetrate both ends of the stator yoke, and a center of each refrigerant groove in the circumferential direction is arranged on a straight line passing through a center of each stator tooth in the circumferential direction and a center of the stator yoke; the refrigerant groove is recessed radially inward on an outer circumferential surface of the stator yoke, a maximum groove width of the refrigerant groove is h, and a width of the stator yoke is H, and a relationship between the h and the H is h≤H / 2. 2.The stator core according to claim 1, characterized in that: a shortest distance between the refrigerant groove and the stator winding slot adjacent to the refrigerant groove is D, and a relationship of the D is 4.8 mm≤D≤5.8 mm. 3.The stator core according to claim 1, characterized in that: a central angle formed by both sides of the refrigerant groove in the circumferential direction and the center of the stator yoke is β, and a relationship of the β is 10°≤β≤20°. The cross-sectional area of the coolant recess is S, and the outer diameter of the stator yoke is R, the relationship between S and R is: 4.0%≤S / (π*R 2 )≤5.0%. 4.The stator core according to claim 1, characterized in that: a number of the refrigerant grooves is m, and a number of the stator winding slots is n, and a relationship between the m and the n is m=n or m=n / 2. 5.The stator core according to claim 1, characterized in that: the refrigerant groove includes a first recessed area and a second recessed area, the first recessed area is arranged on a first circumference, and a radius of the first circumference is smaller than an outer diameter of the stator yoke, and the second recessed area is recessed radially inward at a center of the first recessed area, and the second recessed area is arranged on a second circumference, and a radius of the second circumference is smaller than a radius of the first circumference. 6.The stator core according to claim 5, characterized in that: a profile line of the second recessed area recessed radially inward at the center of the first recessed area is a circular arc line. 7.The stator core according to claim 5, characterized in that: a cross-sectional shape of the second recessed area is a U shape. 8.The stator core according to claim 1, characterized in that: a joint is formed between any two adjacent refrigerant grooves on the outer circumference of the stator yoke, and the joint is combined with an inner circumference of a compressor housing in a surface contact manner. 9.An electric machine, characterized in that: the electric machine includes the stator core according to any one of claims 1 to 8. 10.A compressor, characterized in that: the compressor includes the electric machine according to claim 9. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Images