Stator, stator support ring and compressor for disc motor

Abstract

The present invention provides a stator for a disc motor, a stator support ring and a compressor, belonging to the technical field of refrigeration. The stator includes an annular stator core, and the stator core is formed by radially laminating multiple layers of magnetic conductive materials in an annular or arc shape. In addition, the stator support ring is used to fix the stator of the disc motor, and the inner wall thereof is sleeved on the stator yoke of the stator. The compressor includes a housing; a compression unit fixed in the housing; a disc motor connected to the compression unit, and the disc motor includes a rotor and at least one stator, and the at least one stator is fixed to the housing by a stator support ring.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and particularly to a stator, a stator support ring and a compressor for a disc motor. Background Art

[0002] The difference between an axial flux motor and a radial flux motor is that its magnetic flux direction is axial, and both the stator and the rotor are arranged in a disc shape and axially. Therefore, it is also called a disc motor. Since the stator of the disc motor is flat, the contact area between the stator and the housing of the compressor is small, and there is a large electromagnetic axial tension between the stator and the rotor. Therefore, there is a risk of unreliable fixation of the disc motor in the compressor. Summary of the Invention

[0003] The purpose of the present invention aims to solve at least one of the above problems and defects existing in the prior art.

[0004] According to one aspect of the present invention, there is provided a stator for a disc motor, the stator comprising an annular stator core, the stator core being formed by radially laminating multiple layers of magnetic conductive materials in an annular or arc shape.

[0005] In one example, each layer of the multiple layers of magnetic conductive materials is formed by splicing at least two arc-shaped magnetic conductive materials, and the splicing joints of adjacent layers are staggered from each other and the splicing joints correspond to the stator slots.

[0006] In one example, the stator core further comprises a stator yoke and stator teeth, and the stator yoke is fixedly connected to the stator support ring on the outside.

[0007] In one example, radial mounting holes are provided on the stator yoke, and the stator yoke and the stator support ring are fixedly connected by inserting bolts or fins into the radial mounting holes.

[0008] In one example, first mounting holes are provided on the stator support ring, and the first mounting holes are used for axial fixation of the stator; alternatively, the stator support ring and the stator yoke are fixedly connected by interference fit.

[0009] In one example, the stator core comprises a plurality of arc-shaped modules, and adjacent arc-shaped modules are circumferentially positioned and connected by inserting bolts or fins on the inner flange into the radial mounting holes on the stator yoke.

[0010] In one example, the magnetic conductive material comprises a soft magnetic material or silicon steel sheets; the inner flange and the bolts or fins on the inner flange are integral or separate components.

[0011] In one example, the magnetic conductive material comprises silicon steel sheets.

[0012] According to another aspect of the present invention, a stator support ring is provided, which is used to fix the stator of a disc motor, and the inner wall is sleeved on the stator yoke of the stator, wherein the stator support ring and the stator yoke are sleeved together by interference fit, clearance fit or welding.

[0013] In one example, a plurality of axial first mounting holes are provided on the end face of the stator support ring, and the first mounting holes are used to fix the stator of the disc motor to the housing of the compressor; or

[0014] The stator support ring and the stator support member are integrally formed to fix the stator of the disc motor to the housing of the compressor.

[0015] In one example, the stator is the stator according to the above.

[0016] In one example, the stator includes an annular stator core, and the stator core is composed of a plurality of arc-shaped modules.

[0017] In one example, the stator core of the stator is formed by punching and winding silicon steel strips.

[0018] In one example, the stator core of the stator is formed by single-slot punching of silicon steel strips.

[0019] In one example, the end of the stator support ring in contact with the stator yoke has a single-sided boss structure or a double-sided boss structure in the axial direction.

[0020] In one example, the stator support ring and the stator yoke are sleeved together by clearance fit, and a plurality of radial second mounting holes are provided on the outer wall of the stator support ring. The stator support ring and the stator yoke are fixed together by the cooperation of bolts or rivets and the second mounting holes.

[0021] In one example, the second mounting holes and the first mounting holes are alternately arranged along the circumference of the stator support ring.

[0022] In one example, the stator support ring is in the shape of a circular ring with a uniform radial width.

[0023] In one example, the stator support ring is in the shape of a ring with lug structures distributed uniformly or non-uniformly along the circumference of the stator support ring. Each lug structure is provided with a first mounting hole, and a second mounting hole is provided at the position between two adjacent lug structures.

[0024] In one example, each of the first mounting holes corresponds to a stator slot of the disc motor in the radial direction.

[0025] In one example, the stator is axially fixed to the stator support by bolts through a stator support ring, and the stator support is in interference fit with the housing of the compressor on which the disc motor is installed; or,

[0026] The stator is axially fixed to the stator support by bolts through a stator support ring, and the stator support is integrally provided with the housing of the compressor on which the disc motor is installed; or,

[0027] The stator support ring and the stator support are provided integrally, and the outer side walls of the stator support ring and the stator support are in interference fit with the housing of the compressor on which the disc motor is installed.

[0028] According to another aspect of the present invention, there is provided a compressor, comprising:

[0029] A housing;

[0030] A compression unit fixed within the housing;

[0031] A disc motor connected to the compression unit, the disc motor comprising a rotor and at least one stator, the at least one stator being fixed to the housing by the stator support ring according to the above, and the at least one stator being the stator according to the above,

[0032] Wherein, the at least one stator is arranged on the axial side of the rotor, the compression unit is opposite to the stator yoke of the at least one stator in the axial direction, the rotor is opposite to the stator teeth of the at least one stator, the at least one stator is axially fixedly connected to the stator support through a stator support ring, and the stator support is in interference fit with the housing of the compressor or is an integral part of the housing of the compressor.

[0033] In one example, the stator support ring is an annular ring with lug structures unevenly distributed along the circumferential direction of the stator support ring;

[0034] Each lug structure is provided with a first mounting hole for axially fixedly connecting the stator support ring to the stator support;

[0035] Second mounting holes are provided at positions between two adjacent lug structures for cooperating with bolts or rivets to fix the stator support ring to the stator yoke together;

[0036] Wherein, the distance between two lug structures on the side opposite to the suction port of the compressor is larger than the distance between two lug structures on the suction port side. Description of the Drawings

[0037] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the accompanying drawings of the embodiments will be briefly described below. It should be understood that the following-described accompanying drawings only relate to some embodiments of the present disclosure and do not limit the present disclosure, where:

[0038] Figure 1A and 1B are a front view and a cross-sectional view of a stator and a stator support ring for a disc motor according to an embodiment of the present invention;

[0039] Figure 2A and 2B are a front view and a cross-sectional view of a stator and a stator support ring for a disc motor according to another embodiment of the present invention;

[0040] Figure 3A 、 3B and 3C are a front view, a cross-sectional view, and a perspective view of a stator and a stator support ring for a disc motor according to another embodiment of the present invention;

[0041] Figure 4A 、 Figure 4B 、 Figure 4C and Figure 4D are respectively a front view and a cross-sectional view of four different deformation examples of a stator support ring for a disc motor according to the present invention;

[0042] Figure 5A and Figure 5B are respectively a front view and a cross-sectional view of two different deformation examples of a stator support ring for a disc motor and first and second mounting holes thereon according to the present invention;

[0043] Figure 6A 、 6B and 6C are a front view, a cross-sectional view along the Figure 6A A1 - A1' line in

[0044] Figure 7A and 7B are respectively a view of a layer of silicon steel sheets for a disc motor and a perspective view of a stator core laminated by multiple layers of silicon steel sheets as shown in Figure 7A ;

[0045] Figure 7C shows a schematic structural diagram of the splicing joint of adjacent layers of silicon steel sheets;

[0046] Figure 7D shows a schematic diagram of the fixed connection between the stator core and the stator support ring;

[0047] Figure 7E Shows a schematic diagram of an assembly of a stator core fixed with an inner flange and a stator support ring;

[0048] Figure 7F Shows a schematic diagram of the connection of the inner flange with fins or bolts;

[0049] Figure 7G Shows an exploded schematic diagram of a stator core in a modular form;

[0050] Figure 7H Shows a schematic diagram of a stator core formed by fixed connection with an inner flange;

[0051] Figure 8A 、 8B Figures 8A, 8B, and 8C are partial views of installing a stator in a compressor, another variant of installing a stator in a compressor, and an example of installing two stators in a compressor, respectively, according to an embodiment of the present invention. Detailed Embodiment

[0052] The technical solution of the present invention will be further specifically described below through embodiments in conjunction with Figures 1 - 8C. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0053] The stator support ring, stator, and compressor according to an embodiment of the present invention will be described below with reference to the drawings.

[0054] First, referring to Figure 1A and 1B , a stator support ring 10 is shown. The stator support ring 10 is used to fix the stator 20 of a disc motor, and the inner wall 11 is sleeved on the stator yoke 21 of the stator 20. A plurality of axial first mounting holes 13 are provided on the end face 12 of the stator support ring 10, and the first mounting holes 13 are used to axially fix the stator 20 of the disc motor. The stator 20 further includes stator teeth 22 and windings 23 wound around the stator teeth 22.

[0055] Alternatively, the interference area of the outer end face of the stator support ring 10 is large enough, and the stator support ring 10 can be directly interference - fitted to the compressor housing, so that the first mounting holes 13 do not need to be provided.

[0056] As shown in the figure, the stator support ring 10 includes an annular main body, that is, the main body has substantially the same width or radial length along the radial direction. That is, the stator support ring 10 is a ring or circular ring with a uniform radial width.

[0057] Of course, the stator support ring 10 can also be configured in other forms. For example, as Figure 2A and 2B shown, at the end of the stator support ring 10 in contact with the stator yoke 21, it has a single-sided boss structure 24 in the axial direction, that is, at least one step is provided on the stator support ring 10. Such a design can make the stator support ring 10 have a more compact structure and can reduce the weight. Of course, it can also be configured as shown in Figure 4C wherein, at one end of the stator support ring 10 in contact with the stator yoke 21, it has a double-sided boss structure 35 in the axial direction, that is, a T-shape rotated 90°.

[0058] As Figure 3A and 3B and 3C show, an example of a stator support ring 30 with lug structures is shown, rather than the stator support ring 10 in the form of a circular ring as shown in Figure 1A and 1B and 2A and 2B. The stator support ring 30 is provided with four lug structures 38, which are evenly distributed along the circumferential direction of the stator support ring 30. The size of the lug structures 38 can be set as required and is not limited to the illustrated case.

[0059] In Figure 4A and 4B and 4C, a stator support ring 30 without steps, a stator support ring 30 with a protruding structure 34 on one side, and a stator support ring 30 with protruding structures 35 on both sides are respectively shown. However, the stator support rings in Figure 4A and 4B and 4C are different from those shown in Figure 1A and 1B in that their main body is not a circular ring but an annular shape with lug structures. Specifically, the stator support ring 30 is an annular shape with lug structures evenly distributed along the circumferential direction of the stator support ring 30, as shown in Figure 4A and 4B and 4C, which are respectively provided with 6 lug structures 38. However, it can be understood that those skilled in the art will set any number of lug structures according to specific circumstances, and are not limited to the illustrated case.

[0060] In addition, the lug structures 38 on the stator support ring 30 can also be unevenly distributed along the circumferential direction of the stator support ring 30. Specifically, refer to Figure 4D shown, the distance between the two lug structures 38 on the side opposite to the suction port is larger than the distance between the two lug structures 38 on the suction port side. In this way, the side opposite to the suction port can be closer to the compressor suction port, so that more refrigerant can be inhaled.

[0061] Regardless of the form of the stator support rings 10 or 30, they can be sleeved together with the stator yoke 21 by interference fit or welding.

[0062] In addition, as Figure 5A and 5B shown, the stator support ring 30 and the stator yoke 21 can also be sleeved together by clearance fit, wherein a plurality of radial second mounting holes 36 are provided on the outer wall of the stator support ring 30, and the stator support ring 30 and the stator yoke 21 are fixed together through the cooperation of bolts or rivets 37 and the second mounting holes 36. Figure 5B An example of the stator support ring 30 with a boss structure 34 on one side provided with the second mounting holes 36 is shown, and the view of the stator support ring 30 with boss structures provided on both sides respectively and provided with the second mounting holes 36 is not shown anymore.

[0063] It can be understood that the circular stator support ring 10 can also be similarly provided with the second mounting holes, which are not shown herein.

[0064] Furthermore, as shown in the figure, the second mounting holes 36 and the first mounting holes 13 can be alternately arranged along the circumference of the stator support ring 30. For example, 6 second mounting holes 36 and 6 first mounting holes 13 are alternately distributed in sequence along the circumference of the stator support ring 30. It can be understood that the number and arrangement manner of the first mounting holes and the second mounting holes are not limited to the foregoing, and those skilled in the art can set them according to needs.

[0065] In Figure 5A and 5B , the stator support ring 30 is in a ring shape with lug structures 38 uniformly distributed along the circumferential direction of the stator support ring 30, and each lug structure 38 is provided with a first mounting hole 13, and the second mounting holes 36 are provided at positions between two adjacent lug structures 38.

[0066] As Figure 6A , 6B , 6C shown, each of the first mounting holes 13 corresponds to a stator slot 28 of the disc motor in the radial direction, that is, the first mounting holes 13 and the stator slots 28 correspond one by one in the left - right direction of the page along Figure 6C .

[0067] As described above, the stator for the disc motor can be the stator described in the above embodiments, or alternatively, the stator described in the following embodiments.

[0068] Furthermore, the stator support ring in the present invention can not only be used together with various stators described in the present invention, but also be used together with any known stator of any type or structure for the disc motor.

[0069] Specifically, refer to Figure 7AAnd 7B shows a stator 20 for a disc motor according to another embodiment of the present invention. The stator 20 includes an annular stator core 25, which is formed by laminating annular or arc-shaped multi-layer silicon steel sheets 29 in the radial direction. An example of the silicon steel sheet is shown in this example. It can be understood that the stator core 25 can be made of any suitable type of magnetic conductive material, not limited to the form of silicon steel sheets.

[0070] Such a structure avoids the potential risk of scrapping the entire stator. In addition, due to the high magnetic conductivity of the silicon steel sheet, the problem of increased current is avoided.

[0071] Figure 7A shows a single-layer silicon steel sheet, which is laminated in the radial direction or the lamination direction to form Figure 7B the stator 20 shown. The stator is also provided with radial mounting holes 26.

[0072] See Figure 7C , each layer of the silicon steel sheet 29 is formed by splicing at least two arc-shaped silicon steel sheets. The splicing joints 27 of adjacent layers are staggered from each other and the splicing joints 27 correspond to the stator slots 28. Specifically, in one example, the splicing joints 27 can be at the center of the stator slots 28 or offset a certain distance along the axial direction of the stator and along the rotation direction of the rotor.

[0073] As Figure 7B and 7D shown, the stator core further includes a stator yoke 21 and stator teeth 22. The stator yoke 21 is fixedly connected to the stator support ring 10 outside the stator yoke.

[0074] Specifically, the stator yoke 21 and the stator support ring 10 are fixedly connected by inserting bolts or fins 15 on the stator support ring 10 into the radial mounting holes 26 on the stator yoke 21.

[0075] Specifically, the stator support ring 10 is provided with first mounting holes 13 for axially fixing the stator.

[0076] See Figure 7E and 7F , the inner flange 10' and the bolts or fins 15 on the inner flange 10' are integral or separate components.

[0077] See Figure 7G , in another embodiment of the present invention, the stator core 25 can be formed by splicing a plurality of arc-shaped modules. Each module is an integrally formed module, and its material can be made of soft magnetic material SMC (Sheet molding compound) or silicon steel sheets. Between adjacent arc-shaped modules, bolts or fins 15 on the inner flange 10' are inserted into the radial mounting holes ( Figure 7GFor circumferential positioning and connection (not shown).

[0078] Each module is sequentially installed on the fins or bolts 15 to form the stator core 25 as Figure 7H shown.

[0079] As Figure 7H shown, the bolt 15 is inserted into the radial mounting hole 26 from the inside of the stator core 25, but the radial mounting hole 26 only extends through a part of the stator support ring, that is, it does not completely penetrate the stator support ring. Of course, those skilled in the art can select the length and size of the radial mounting hole 26. For example, it can also be designed to penetrate the stator support ring so that the bolt 15 can also be inserted from the outside.

[0080] Since the magnetic field direction in the stator yoke mostly changes along the circumferential direction of the stator yoke, which is parallel to the plane where the bolts or fins are located, even if the bolts or fins are connected to each other, electromagnetic induction current can be avoided, so that it can play the role of fixed support and does not affect the performance of the motor.

[0081] In Figure 8A , 8B and 8C, a compressor 100 is shown, which includes a housing 150, a compression unit (not shown) and a disc motor. The disc motor is connected to the compression unit, and the disc motor includes a rotor (not shown), a first stator 110 and a second stator 120. The first stator 110 and the second stator 120 are respectively fixed by a stator support ring 130, and the stator support ring 130 can be the stator support ring 10 or 30 described in any of the above embodiments. The motor can be a scroll compressor, and the compression unit is a compression unit composed of a scroll disk.

[0082] Specifically referring to Figure 8C , the first stator 110 and the second stator 120 are respectively arranged on the axial two sides of the rotor. The compression unit is opposite to the stator yokes 111 and 121 of the first stator 110 and the second stator 120 in the axial direction. The rotor is arranged in the space formed axially between the first stator 110 and the stator support 130 of the first stator 110 and between the second stator 120 and the stator support 130 of the second stator 120. The rotor is opposite to the stator teeth 112 and 122 of the first stator 110 and the second stator 120. The first stator 110 and the second stator 120 are respectively fixedly connected to the corresponding stator supports 140 axially through their respective stator support rings 130, and the corresponding stator supports 140 are respectively in interference fit with the housing 150 of the compressor 100.

[0083] Specifically, the first stator 110 includes a stator yoke 111, stator teeth 112, and a winding 113 wound around the stator teeth 112. Similarly, the second stator 120 includes a stator yoke 121, stator teeth 122, and a winding 123 wound around the stator teeth 122.

[0084] Specifically, as Figure 8A and 8C shown, the stator support 140 is a component separated from the housing 150. The stator support ring 130 is fixedly connected to the stator support 140 by bolts 131 inserted into the first mounting holes 133.

[0085] As Figure 8B shown, the stator support 130 can also be a part of the housing, that is, a component of the housing. As shown in the figure, a part of the housing 150 is set in a stepped form, which serves to support the stator support ring 130.

[0086] In the present invention, by installing a stator support ring outside the stator yoke and fixedly connecting the stator support ring to the stator support by fixing members such as bolts, the axial fixation of the stator of the disc motor is achieved. It can be understood that other connections can also be adopted between the stator support ring and the stator support, such as interference fit or welding, etc. The interference area of the stator support in the axial direction is larger than the area of the stator yoke in the axial direction, such as greater than or equal to 1.5 times. The stator support ring can also be directly in interference fit with the housing of the compressor without using the stator support under appropriate circumstances.

[0087] Although the above shows the case where a stator is provided on each side of a rotor, of course, it can also be designed such that one rotor corresponds to one stator. The number of rotors and stators in the compressor is not limited to the illustrated case, and those skilled in the art can select according to needs.

[0088] In the embodiments of the present invention, an axial disc motor and a compressor using such a disc motor are taken as examples for illustration. However, those skilled in the art can understand that the compressor can be a vertical compressor or a horizontal compressor. Similarly, the compressor can be a single-cylinder compressor or a multi-cylinder compressor.

[0089] The above are only some embodiments of the present invention. Those of ordinary skill in the art will understand that changes can be made to these embodiments without departing from the principles and spirit of the overall inventive concept. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator for a disc motor, the stator comprising an annular stator core formed by radially stacking multiple layers of magnetic conductive materials in an annular or arc shape, each layer of the multiple layers of magnetic conductive materials being formed by splicing at least two arc-shaped magnetic conductive materials, the splicing joints of adjacent layers being staggered from each other and corresponding to stator slots, wherein the stator core further comprises a stator yoke, and radial mounting holes are provided on the stator yoke, and the stator yoke and a stator support ring are fixedly connected by inserting bolts or fins into the radial mounting holes.

2. The stator for a disc motor according to claim 1, wherein the stator core further comprises stator teeth and windings wound around the stator teeth, and the stator yoke is fixedly connected to the stator support ring on the outer side.

3. The stator for a disc motor according to claim 2, wherein first mounting holes are provided on the stator support ring, and the first mounting holes are used for axial fixation of the stator.

4. The stator for a disc motor according to claim 1, wherein the magnetic conductive material comprises soft magnetic material; the inner flange and the bolts or fins on the inner flange are integral or separate components.

5. The stator for a disc motor according to any one of claims 1 to 3, characterized in that, The magnetic conductive material comprises silicon steel sheets.

6. A stator for a disc motor, the stator comprising an annular stator core formed by radially stacking multiple layers of magnetic conductive materials in an annular or arc shape, each layer of the multiple layers of magnetic conductive materials being formed by splicing at least two arc-shaped magnetic conductive materials, the splicing joints of adjacent layers being staggered from each other and corresponding to stator slots, the stator core further comprising a stator yoke, stator teeth and windings wound around the stator teeth, the stator yoke being fixedly connected to the stator support ring on the outer side, and the stator support ring and the stator yoke being fixedly connected by interference fit.

7. A stator for a disc motor, the stator comprising an annular stator core formed by radially stacking multiple layers of magnetic conductive materials in an annular or arc shape, each layer of the multiple layers of magnetic conductive materials being formed by splicing at least two arc-shaped magnetic conductive materials, the splicing joints of adjacent layers being staggered from each other and corresponding to stator slots, the stator core further comprising a stator yoke, stator teeth and windings wound around the stator teeth, the stator yoke being fixedly connected to the stator support ring on the outer side, and the stator core comprising multiple arc-shaped modules, and adjacent arc-shaped modules are circumferentially positioned and connected by inserting bolts or fins on an inner flange into radial mounting holes on the stator yoke.

8. A stator support ring for fixing the stator for a disc motor according to any one of claims 1 - 7 and having an inner wall sleeved on the stator yoke of the stator, wherein the stator support ring and the stator yoke are sleeved together by interference fit, clearance fit or welding.

9. The stator support ring according to claim 8, wherein a plurality of axial first mounting holes are provided on the end face of the stator support ring, and the first mounting holes are used for fixing the stator of the disc motor to the housing of a compressor; or The stator support ring and the stator support are integrally provided for fixing the stator of the disc motor to the housing of the compressor.

10. The stator support ring according to claim 9, wherein the stator core of the stator is formed by punching and winding silicon steel strips.

11. The stator support ring according to claim 9, wherein the stator core of the stator is formed by single-slot punching of silicon steel strips.

12. The stator support ring according to claim 9, wherein the end of the stator support ring in contact with the stator yoke has a single-sided boss structure or a double-sided boss structure in the axial direction.

13. The stator support ring according to claim 9, wherein the stator support ring and the stator yoke are sleeved together by clearance fit, and a plurality of radial second mounting holes are provided on the outer wall of the stator support ring, and the stator support ring and the stator yoke are fixed together by the cooperation of bolts or rivets and the second mounting holes.

14. The stator support ring according to claim 13, wherein the second mounting holes and the first mounting holes are alternately arranged along the circumference of the stator support ring.

15. The stator support ring according to claim 13, wherein the stator support ring is in the shape of an annular ring with a uniform radial width.

16. The stator support ring according to claim 13, wherein the stator support ring is in the shape of an annular ring with lug structures distributed uniformly or non-uniformly along the circumferential direction of the stator support ring, and a first mounting hole is provided on each lug structure, and a second mounting hole is provided at the position between two adjacent lug structures.

17. The stator support ring according to claim 9, wherein each of the first mounting holes corresponds to a stator slot of the disc motor in the radial direction.

18. The stator support ring according to claim 9, wherein the stator is axially fixed to the stator support by bolts through the stator support ring, and the stator support is in interference fit with the housing of the compressor on which the disc motor is installed; or, the stator is axially fixed to the stator support by bolts through the stator support ring, and the stator support is integrally provided with the housing of the compressor on which the disc motor is installed; or, the stator support ring and the stator support are integrally provided, and the outer side walls of the stator support ring and the stator support are in interference fit with the housing of the compressor on which the disc motor is installed.

19. A compressor, comprising: a housing; a compression unit fixed in the housing; a disc motor connected to the compression unit, the disc motor including a rotor and at least one stator, the at least one stator being fixed to the housing by a stator support ring according to any one of claims 8-18, and the at least one stator being a stator according to any one of claims 1-7, Among them, the at least one stator is arranged on the axial side of the rotor. The compression unit is opposite to the stator yoke of the at least one stator in the axial direction. The rotor is opposite to the stator teeth of the at least one stator. The at least one stator is fixedly connected to the stator support in the axial direction through a stator support ring. The stator support is in interference fit with the housing of the compressor or is an integral part of the housing of the compressor.

20. The compressor according to claim 19, wherein the stator support ring is annular with lug structures unevenly distributed along the circumferential direction of the stator support ring; each lug structure is provided with a first mounting hole for fixedly connecting the stator support ring to the stator support in the axial direction; a second mounting hole is provided at a position between two adjacent lug structures for cooperating with a bolt or a rivet to fix the stator support ring and the stator yoke together; wherein, compared with the distance between two lug structures on the suction port side of the compressor, the distance between two lug structures on the opposite side of the suction port is larger.

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