Stator shell assembly and compressor assembly

Abstract

The invention provides a stator shell assembly and a compressor assembly, the stator shell assembly comprises a stator and a shell, the stator is located in the shell, and the outer circumferential wall of the stator and the inner circumferential wall of the shell are welded; at least two welding positions, including a first welding position and a second welding position, exist on the peripheral wall of the stator in the circumferential direction; the periphery of the shell is also connected with a liquid separator; in the projection plane of the axial end face of the shell, the shell is provided with a shell center, the liquid separator is provided with a liquid separator center, and the connecting line of the shell center and the liquid separator center forms a shell liquid separator center connecting line; the connecting line of the center of the first welding position and the center of the second welding position is a first connecting line, and the first connecting line is parallel to the connecting line of the centers of the shell liquid dispensers. According to the compressor assembly, vibration in the radial direction of the liquid separator can be dispersed, the vibration in the radial direction of the liquid separator is reduced to a certain degree, therefore, vibration of the whole compressor assembly is reduced, and the vibration reduction and noise reduction effects are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a stator housing assembly and a compressor assembly. Background Art

[0002] So far, most compressor manufacturers widely use the stator welding shell process. The existing method of fixing the stator of the compressor is mainly heat-fitting, that is, heating the compressor shell to expand the shell, and then inserting the stator. After the compressor shell cools down, the stator can be fixed inside the shell. However, in this way, the contact surface between the motor and the compressor shell is large. As a result, the vibration generated by the motor is more easily transmitted to the shell, and then to the compressor. Therefore, reducing the contact surface between the stator and the shell can reduce the transmission of motor vibration, thereby reducing the vibration of the compressor.

[0003] There are many reasons why the compressor vibrates. Among them, the operation of the motor will cause the radial vibration of the liquid distributor to increase, which will increase the vibration of the compressor.

[0004] Since the stator installation in the compressor in the prior art is unreasonable, resulting in technical problems such as large vibration during operation, the present invention studies and designs a stator housing assembly and a compressor assembly. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the stator installation in the compressor in the prior art is unreasonable, resulting in large vibrations during operation, thereby providing a stator housing assembly and a compressor assembly.

[0006] In order to solve the above problems, the present invention provides a stator housing assembly, which includes:

[0007] A stator and a shell, wherein the stator is located inside the shell, and the outer peripheral wall of the stator is welded to the inner peripheral wall of the shell; the outer peripheral wall of the stator has at least two welding positions in the circumferential direction, including a first welding position and a second welding position; and a liquid distributor is also connected to the outer periphery of the shell;

[0008] And within the projection plane of the axial end face of the shell, the shell has a shell center, the dispenser has a dispenser center, and a line connecting the shell center and the dispenser center forms a shell-dispenser center line; and a line connecting the center of the first welding position and the center of the second welding position is a first line, and the first line is parallel to the shell-dispenser center line.

[0009] In some embodiments,

[0010] It also includes a flange, which is also arranged in the housing and located on one axial side of the stator, the outer peripheral wall of the flange is welded to the inner wall of the housing, and there is a fourth welding position on the outer peripheral wall of the flange in the circumferential direction;

[0011] In the projection plane of the axial end surface of the housing, the first welding position on the stator and the fourth welding position of the flange at least partially overlap.

[0012] In some embodiments,

[0013] The outer peripheral wall of the stator also has a third welding position. In the projection plane of the axial end surface of the shell, the first welding position, the second welding position and the third welding position are sequentially spaced and distributed in the circumferential direction.

[0014] In some embodiments,

[0015] The outer circumferential wall of the stator has a cut edge and a non-cut edge, the cut edge is the outer circumferential wall formed by cutting off part of the structure radially inward from the original outer circumferential wall of the stator, the non-cut edge is between two adjacent cut edges, and the first welding position, the second welding position and the third welding position are all arranged on the outer circumferential wall without the cut edge.

[0016] In some embodiments,

[0017] In the projection surface of the axial end surface of the shell, the first welding position, the second welding position and the third welding position are evenly spaced in the circumferential direction, the center of the first welding position, the center of the second welding position and the center of the third welding position are connected in sequence to form an equilateral triangle, and the center angle of the arc segment between the center of the first welding position and the center of the second welding position on the inner wall of the shell is 120°, the center angle of the arc segment between the center of the second welding position and the center of the third welding position on the inner wall of the shell is 120°, and the center angle of the arc segment between the center of the third welding position and the center of the first welding position on the inner wall of the shell is 120°.

[0018] In some embodiments,

[0019] In a projection plane of the axial end surface of the housing, the first welding position, the second welding position and the third welding position are distributed at uneven intervals in a circumferential direction.

[0020] In some embodiments,

[0021] The first welding position extends in an axial direction on the outer circumferential wall of the stator, the second welding position extends in an axial direction on the outer circumferential wall of the stator, and the third welding position extends in an axial direction on the outer circumferential wall of the stator, and the sum of the axial lengths of the first welding position, the second welding position, and the third welding position does not exceed the axial length of the stator.

[0022] In some embodiments,

[0023] The axial length of the first welding position is less than 1 / 3 of the axial length of the stator, the axial length of the second welding position is less than 1 / 3 of the axial length of the stator, and the axial length of the third welding position is less than 1 / 3 of the axial length of the stator.

[0024] In some embodiments,

[0025] One axial end of the first welding position, one axial end of the second welding position and one axial end of the third welding position are all located on the same first axial plane, the other axial end of the first welding position, the other axial end of the second welding position and the other axial end of the third welding position are all located on the same second axial plane, the first axial plane is perpendicular to the central axis of the stator, and the second axial plane is perpendicular to the central axis of the stator.

[0026] In some embodiments,

[0027] A first distance greater than 0 is provided between one axial end of the first welding position and one end surface of the stator in the same axial direction, and a second distance greater than 0 is provided between the other axial end of the first welding position and the other end surface of the stator in the same axial direction, and the first distance is equal to the second distance;

[0028] A third distance greater than 0 is provided between one axial end of the second welding position and one end surface of the stator in the same axial direction, and a fourth distance greater than 0 is provided between the other axial end of the second welding position and the other end surface of the stator in the same axial direction, and the third distance is equal to the fourth distance;

[0029] A fifth distance greater than 0 is present between one axial end of the third welding position and one end face of the stator in the same axial direction, a sixth distance greater than 0 is present between the other axial end of the third welding position and the other end face of the stator in the same axial direction, and the fifth distance is equal to the sixth distance.

[0030] The present invention also provides a compressor assembly, which comprises the stator housing assembly mentioned above.

[0031] A stator housing assembly and a compressor assembly provided by the present invention have the following beneficial effects:

[0032] 1. The present invention improves the welding position between the stator and the shell so that the stator and the shell can be welded and fixed by a plurality of welding positions arranged at intervals. Compared with the shrink sleeve method used in the prior art, the contact area between the stator and the shell is greatly reduced, thereby effectively reducing the transmission of compressor vibration. In addition, by setting the center line of the first and second welding positions to be parallel to the center line of the shell liquid distributor, the radial vibration transmission between the compressor and the liquid distributor can be effectively suppressed, and the radial vibration of the compressor transmitted to the liquid distributor can be minimized and suppressed. The radial vibration of the liquid distributor can be dispersed, and the radial vibration of the liquid distributor can be reduced to a certain extent, thereby reducing the vibration of the entire compressor assembly, and the vibration reduction and noise reduction effects are greatly improved.

[0033] 2. The present invention also arranges the first welding position on the stator relative to the fourth welding position on the flange in the axial direction, so that the stator and the flange have at least one identical fixed position in the circumferential direction, so that the vibration transmission and suppression of the stator to the rotor and the axial transmission and suppression of the flange to the rotating shaft can at least remain consistent, which can further suppress the vibration generated by the rotation of the rotor and the rotating shaft, further play a vibration reduction role and effect on the inside of the compressor, and improve the vibration reduction and noise reduction performance.

[0034] 3. The present invention can further improve the fixing effect on the stator and the vibration reduction effect by setting the third welding position, and the three welding positions are evenly spaced in the circumferential direction, which can further make the vibration transmission evenly distributed in the circumferential direction, and further achieve the effect of vibration reduction and noise reduction; the present invention also preferably sets multiple welding positions on non-cut edges, which can reduce the distance from the inner wall of the shell and improve the welding fixation effect. The contact area between the stator and the shell can be reduced by cutting the edges, and the effect of vibration reduction and noise reduction can be further improved; the present invention limits the axial length of the welding position, which can ensure the welding firmness between the stator and the shell while further reducing the contact area between the stator and the shell, and further reduce vibration; by locating the stator welding point (seam) at the center position (axial direction) outside the motor stator, the welding firmness can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a top view of the stator housing assembly (motor) of the present invention;

[0036] Figure 2 is a side cross-sectional internal view of a compressor assembly of the present invention.

[0037] The reference numerals are:

[0038] 1. Stator; 2. Shell; 3. First welding position; 4. Second welding position; 5. Third welding position; 6. Dispenser; 7. Shell center; 8. Shell-dispenser center line; 9. First line; 10. Flange; 11. Fourth welding position; 12. Fifth welding position; 13. Sixth welding position; 14. Cutting edge; 15. Non-cutting edge. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0042] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0045] like Figure 1-2 As shown, the present invention provides a stator housing assembly, which includes:

[0046] A stator 1 and a housing 2, wherein the stator 1 is located inside the housing 2, and the outer peripheral wall of the stator 1 is welded to the inner peripheral wall of the housing 2; the outer peripheral wall of the stator 1 has at least two welding positions (preferably including first, second and third welding positions) in the circumferential direction, including a first welding position 3 and a second welding position 4; and a liquid distributor 6 is also connected to the outer periphery of the housing 2;

[0047] In the projection plane of the axial end face of the shell 2, the shell 2 has a shell center 7, the dispenser 6 has a dispenser center, and the shell center 7 and the dispenser center connecting line form a shell dispenser center connecting line 8; and the connecting line of the center of the first welding position 3 and the center of the second welding position 4 is a first connecting line 9, and the first connecting line 9 is parallel to the shell dispenser center connecting line 8.

[0048] The present invention improves the welding position between the stator and the shell so that the welding and fixing between the stator and the shell can be completed through a plurality of welding positions arranged at intervals. Compared with the shrink sleeve method used in the prior art, the contact area between the stator and the shell is greatly reduced, thereby effectively reducing the transmission of compressor vibration. In addition, by setting the center line of the first and second welding positions to be parallel to the center line of the shell distributor, the radial vibration transmission between the compressor and the distributor can be effectively inhibited, and the radial vibration of the compressor transmitted to the distributor can be minimized and inhibited. The radial vibration of the distributor can be dispersed, and the radial vibration of the distributor can be reduced to a certain extent, thereby reducing the vibration of the entire compressor assembly, and the vibration reduction and noise reduction effects are greatly improved.

[0049] In some embodiments,

[0050] It also includes a flange 10, which is also arranged in the housing 2 and is located on one axial side of the stator 1, the outer peripheral wall of the flange 10 is welded to the inner wall of the housing 2, and there is a fourth welding position 11 on the outer peripheral wall of the flange 10 in the circumferential direction;

[0051] In the projection plane of the axial end surface of the housing 2 , the first welding position 3 on the stator 1 and the fourth welding position 11 of the flange 10 at least partially overlap.

[0052] The present invention also arranges the first welding position on the stator relative to the fourth welding position on the flange in the axial direction, so that the stator and the flange have at least one identical fixed position in the circumferential direction, so that the vibration transmission and suppression of the rotor by the stator and the axial transmission and suppression of the rotating shaft by the flange can at least remain consistent, which can further suppress the vibration generated by the rotation of the rotor and the rotating shaft, further play a vibration reduction role and effect on the inside of the compressor, and improve the vibration reduction and noise reduction performance.

[0053] Further preferably, a fifth welding position 12 and a sixth welding position 13 are further provided on the outer peripheral wall of the flange 10 , and the fourth welding position 11 , the fifth welding position 12 and the sixth welding position 13 are sequentially spaced apart in the circumferential direction.

[0054] Preferably, the non-uniform distribution of the stator welding points needs to ensure that the first welding point of the stator and the fourth welding point of the flange partially overlap. The uniform distribution of the stator welding points only needs to ensure that the line connecting the first welding point and the second welding point of the stator is parallel to the line connecting the center of the shell liquid distributor, and at this time, the first welding point of the stator and the fourth welding point of the flange do not necessarily overlap.

[0055] In some embodiments,

[0056] The stator 1 also has a third welding position 5 on its outer peripheral wall. In the projection plane of the axial end surface of the housing 2, the first welding position 3, the second welding position 4 and the third welding position 5 are sequentially spaced apart in the circumferential direction.

[0057] The present invention can further improve the fixing effect on the stator and the vibration reduction effect by setting the third welding position, and the three welding positions are evenly spaced in the circumferential direction, which can further make the vibration transmission evenly distributed in the circumferential direction, further achieving the effect of vibration reduction and noise reduction.

[0058] Figure 1 The figure shows a top view of the compressor of the present invention. The strip-shaped shadow part is the angle range of the three stator welding points (seams) I, II, and III (i.e., the first welding position 3, the second welding position 4, and the third welding position 5). The semicircular shadow is the range of the three flange welding points a, b, and c (i.e., the fourth welding position 11, the fifth welding position 12, and the sixth welding position 13). The stator trim is the gap between the motor stator and the shell that is not in contact. The line connecting the air intake of the liquid distributor and the center of the shell is the center line of the liquid distributor and the shell. In the figure, the axial projection of the stator welding point (seam) I coincides with the flange welding point a, and the stator welding point (seam) I is located at a non-stator trim. On the basis of the stator welding point (seam) I, a straight line parallel to the center line of the liquid distributor and the shell is drawn and intersects on the shell. The intersection of this straight line and the shell, which is also located at a non-stator trim, is taken as the stator welding point (seam) II. In addition, in order to better fix the motor on the housing, a stator weld (seam) III which is not at the stator cutting edge is taken on the other side of the line connecting the stator weld (seam) I and the stator weld (seam) II.

[0059] In some embodiments,

[0060] The stator 1 has a cut edge 14 and a non-cut edge 15 on its outer peripheral wall. The cut edge 14 is an outer peripheral wall formed by cutting off part of the structure radially inward from the original outer peripheral wall of the stator 1. The non-cut edge 15 is between two adjacent cut edges 14. The first welding position 3, the second welding position 4 and the third welding position 5 are all arranged on the outer peripheral wall of the non-cut edge 15.

[0061] The present invention also preferably sets multiple welding positions on non-cut edges, which can reduce the distance between the stator and the inner wall of the shell and improve the welding fixation effect. The contact area between the stator and the shell can be reduced by cutting the edges, further improving the vibration reduction and noise reduction effect.

[0062] In some embodiments,

[0063] In the projection plane of the axial end face of the shell 2, the first welding position 3, the second welding position 4 and the third welding position 5 are evenly spaced in the circumferential direction, the center of the first welding position 3, the center of the second welding position 4 and the center of the third welding position 5 are connected in sequence to form an equilateral triangle, and the center angle of the arc segment between the center of the first welding position 3 and the center of the second welding position 4 on the inner wall of the shell 2 is 120°, the center angle of the arc segment between the center of the second welding position 4 and the center of the third welding position 5 on the inner wall of the shell 2 is 120°, and the center angle of the arc segment between the center of the third welding position 5 and the center of the first welding position 3 on the inner wall of the shell 2 is 120°.

[0064] In some embodiments,

[0065] In the projection plane of the axial end surface of the housing 2 , the first welding positions 3 , the second welding positions 4 and the third welding positions 5 are distributed at uneven intervals in the circumferential direction.

[0066] This is another embodiment of the present invention, that is, the stator welding points (seams) I, II, and III are three circumferentially non-uniformly distributed continuous welds. During welding, it must be ensured that: the axial heights of the three continuous welds are the same and the starting and ending positions of the welds are located on the same plane; each continuous weld must be kept parallel to the compressor axis, that is, the weld must be vertical and cannot be tilted; the sum of the axial lengths of the three welds must be controlled within the stator stack height.

[0067] In some embodiments,

[0068] The first welding position 3 extends in the axial direction on the outer circumferential wall of the stator 1, the second welding position 4 extends in the axial direction on the outer circumferential wall of the stator 1, and the third welding position 5 extends in the axial direction on the outer circumferential wall of the stator 1, and the sum of the axial lengths of the first welding position 3, the second welding position 4 and the third welding position 5 does not exceed the axial length of the stator 1.

[0069] The present invention limits the axial length of the welding position, thereby ensuring the welding firmness between the stator and the housing and further reducing the contact area between the stator and the housing, thereby further reducing vibration.

[0070] In some embodiments,

[0071] The axial length of the first welding position 3 is less than 1 / 3 of the axial length of the stator 1 , the axial length of the second welding position 4 is less than 1 / 3 of the axial length of the stator 1 , and the axial length of the third welding position 5 is less than 1 / 3 of the axial length of the stator 1 .

[0072] The present invention limits the axial length of the welding position, thereby ensuring the welding firmness between the stator and the housing and further reducing the contact area between the stator and the housing, thereby further reducing vibration.

[0073] Figure 2 The figure shows a cross-sectional view of the compressor. The long strip along the axial direction in the figure is the stator welding point (seam) I, and the welding method is laser welding. During welding, the corresponding position of the shell component and the connecting part of the outer side of the motor stator are melted together to achieve the connection effect. The stator welding point (seam) is located in the center of the outer side of the motor stator (axial direction). The axial length of a single weld seam shall not exceed 1 / 3 of the stator stack height (pure iron core height) (to reduce vibration and ensure welding strength and firmness). The total length of the three weld seams shall not exceed the stator stack height.

[0074] In some embodiments,

[0075] One axial end of the first welding position 3, one axial end of the second welding position 4 and one axial end of the third welding position 5 are all located on the same first axial plane, the other axial end of the first welding position 3, the other axial end of the second welding position 4 and the other axial end of the third welding position 5 are all located on the same second axial plane, the first axial plane is perpendicular to the central axis of the stator 1, and the second axial plane is perpendicular to the central axis of the stator 1.

[0076] That is, the three continuous welds of the present invention have the same axial height and the starting and ending positions of the welds are located on the same plane, which can further improve the uniformity of structural support, improve welding firmness, and further improve vibration reduction performance; each continuous weld needs to be kept parallel to the compressor axis, that is, the weld needs to be vertical and cannot be tilted; the sum of the axial lengths of the three welds needs to be controlled within the stator stack height.

[0077] In some embodiments,

[0078] A first distance greater than 0 is provided between one axial end of the first welding position 3 and one end surface of the stator 1 in the same axial direction, and a second distance greater than 0 is provided between the other axial end of the first welding position 3 and the other end surface of the stator 1 in the same axial direction, and the first distance is equal to the second distance;

[0079] A third distance greater than 0 is provided between one axial end of the second welding position 4 and one end surface of the stator 1 in the same axial direction, and a fourth distance greater than 0 is provided between the other axial end of the second welding position 4 and the other end surface of the stator 1 in the same axial direction, and the third distance is equal to the fourth distance;

[0080] There is a fifth distance greater than 0 between one axial end of the third welding position 5 and one end face of the stator 1 in the same axial direction, and there is a sixth distance greater than 0 between the other axial end of the third welding position 5 and the other end face of the stator 1 in the same axial direction, and the fifth distance is equal to the sixth distance.

[0081] The present invention can locate the stator welding point (seam) at the center position (axial direction) outside the motor stator by the above-mentioned means, which can further improve the welding firmness and also improve the vibration reduction performance.

[0082] The present invention allows the stator welding points (seams) I, II, III to be evenly distributed (more evenly stressed and more balanced) on the premise that the connecting line of the stator welding points (seams) I, II is parallel to the connecting line of the center of the shell liquid distributor, and the stator welding points (seams) I, II, III are all located on the non-stator cutting edge (uncut part), such as Figure 1 As shown in the figure, θ is the starting angle of the weld, that is, the angle between the weld II and the center of the shell and the center of the liquid distributor and the shell. At this time, the welding position and height requirements of the weld are the same as those of the non-uniform distribution.

[0083] The present invention also provides a compressor assembly, which comprises the stator housing assembly mentioned above.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A stator housing assembly, characterized in that: include: A stator (1) and a shell (2), wherein the stator (1) is located inside the shell (2), and the outer peripheral wall of the stator (1) is welded to the inner peripheral wall of the shell (2); the outer peripheral wall of the stator (1) has at least two welding positions in the circumferential direction, including a first welding position (3) and a second welding position (4); and a liquid distributor (6) is also connected to the outer periphery of the shell (2); Furthermore, within the projection plane of the axial end face of the shell (2), the shell (2) has a shell center (7), the liquid dispenser (6) has a liquid dispenser center, and a line connecting the shell center (7) and the liquid dispenser center forms a shell-liquid dispenser center line (8); and a line connecting the center of the first welding position (3) and the center of the second welding position (4) is a first line (9), and the first line (9) is parallel to the shell-liquid dispenser center line (8).

2. The stator housing assembly according to claim 1, characterized in that: It also includes a flange (10), the flange (10) is also arranged in the housing (2) and the flange (10) is located on one axial side of the stator (1), the outer peripheral wall of the flange (10) is welded to the inner wall of the housing (2), and a fourth welding position (11) is present on the outer peripheral wall of the flange (10) in the circumferential direction; In the projection plane of the axial end face of the housing (2), the first welding position (3) on the stator (1) and the fourth welding position (11) of the flange (10) at least partially overlap.

3. The stator housing assembly according to claim 1, characterized in that: The stator (1) also has a third welding position (5) on its outer peripheral wall. In the projection plane of the axial end face of the housing (2), the first welding position (3), the second welding position (4) and the third welding position (5) are sequentially spaced apart in the circumferential direction.

4. The stator housing assembly according to claim 3, characterized in that: The outer peripheral wall of the stator (1) is provided with a cut edge (14) and a non-cut edge (15); the cut edge (14) is an outer peripheral wall formed by cutting away a portion of the structure radially inward from the original outer peripheral wall of the stator (1); the non-cut edge (15) is located between two adjacent cut edges (14); and the first welding position (3), the second welding position (4) and the third welding position (5) are all arranged on the outer peripheral wall of the non-cut edge (15).

5. The stator housing assembly according to claim 4, characterized in that: In the projection plane of the axial end face of the shell (2), the first welding position (3), the second welding position (4) and the third welding position (5) are evenly spaced in the circumferential direction, the center of the first welding position (3), the center of the second welding position (4) and the center of the third welding position (5) are connected in sequence to form an equilateral triangle, and the center angle of the arc segment between the center of the first welding position (3) and the center of the second welding position (4) on the inner wall of the shell (2) is 120°, the center angle of the arc segment between the center of the second welding position (4) and the center of the third welding position (5) on the inner wall of the shell (2) is 120°, and the center angle of the arc segment between the center of the third welding position (5) and the center of the first welding position (3) on the inner wall of the shell (2) is 120°.

6. The stator housing assembly according to claim 4 or 5, characterized in that: In the projection plane of the axial end surface of the shell (2), the first welding position (3), the second welding position (4) and the third welding position (5) are distributed at uneven intervals in the circumferential direction.

7. The stator housing assembly according to any one of claims 3 to 6, characterized in that: The first welding position (3) extends along the axial direction on the outer peripheral wall of the stator (1), the second welding position (4) extends along the axial direction on the outer peripheral wall of the stator (1), and the third welding position (5) extends along the axial direction on the outer peripheral wall of the stator (1), and the sum of the axial lengths of the first welding position (3), the second welding position (4) and the third welding position (5) does not exceed the axial length of the stator (1).

8. The stator housing assembly according to claim 7, characterized in that: The axial length of the first welding position (3) is less than 1 / 3 of the axial length of the stator (1), the axial length of the second welding position (4) is less than 1 / 3 of the axial length of the stator (1), and the axial length of the third welding position (5) is less than 1 / 3 of the axial length of the stator (1).

9. The stator housing assembly according to claim 3, characterized in that: One axial end of the first welding position (3), one axial end of the second welding position (4) and one axial end of the third welding position (5) are all located on the same first axial plane, and the other axial ends of the first welding position (3), the other axial ends of the second welding position (4) and the other axial ends of the third welding position (5) are all located on the same second axial plane, the first axial plane is perpendicular to the central axis of the stator (1), and the second axial plane is perpendicular to the central axis of the stator (1).

10. The stator housing assembly according to claim 9, characterized in that: A first distance greater than 0 is present between one axial end of the first welding position (3) and an end face of the stator (1) in the same axial direction, and a second distance greater than 0 is present between the other axial end of the first welding position (3) and the other end face of the stator (1) in the same axial direction, and the first distance is equal to the second distance; A third distance greater than 0 is present between one axial end of the second welding position (4) and one end surface of the stator (1) in the same axial direction, and a fourth distance greater than 0 is present between the other axial end of the second welding position (4) and another end surface of the stator (1) in the same axial direction, and the third distance is equal to the fourth distance; A fifth distance greater than 0 is present between one axial end of the third welding position (5) and an end face of the stator (1) in the same axial direction, and a sixth distance greater than 0 is present between the other axial end of the third welding position (5) and the other end face of the stator (1) in the same axial direction, and the fifth distance is equal to the sixth distance.

11. A compressor assembly, characterized in that: The invention comprises the stator housing assembly according to any one of claims 1 to 10.

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