Rotary compressor and refrigeration equipment with same

Abstract

The utility model discloses a rotary compressor and refrigeration equipment with the rotary compressor. The rotary compressor comprises a shell, a rotating shaft and a rotating shaft, the motor is arranged in the shell and comprises a stator, the stator comprises a stator iron core, the outer circumferential wall of the stator iron core is provided with a plurality of protruding parts, the protruding parts are arranged at intervals in the circumferential direction of the stator iron core, the number of the protruding parts is N, at least part of the protruding parts are connected with the inner circumferential wall of the shell in a welded mode, the number of welding spots is M, and N / M is larger than or equal to 1 and smaller than or equal to 4. According to the rotary compressor provided by the utility model, the contact area of the stator core and the shell can be ensured, and the reliability and stability of the connection of the stator core and the shell are ensured while the motor performance is ensured, so that the retention force of the fixation of the stator and the shell is ensured, and the connection rigidity of the stator and the shell is improved; the problem of welding deformation of the motor can be solved, the service life of the motor is prolonged, the overall performance of the rotary compressor is improved, and the noise problem and the vibration problem of the rotary compressor can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, in particular to a rotary compressor and refrigeration equipment having the same. Background Art

[0002] In the related art, due to the increase in the number of stator slots of the motor in the rotary compressor, the overall rigidity of the stator is weakened. The prior art mostly adopts the method of increasing the yoke thickness to solve this problem, but at the same time it leads to a reduction in the stator slot area, which in turn leads to a reduction in the amount of copper wire used and a decrease in motor performance. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a rotary compressor, which can ensure the reliability and stability of the connection between the stator core and the housing while ensuring the performance of the motor, ensure the retention force of the stator and the housing, and improve the connection rigidity between the stator and the housing.

[0004] The utility model also provides a refrigeration device, which comprises the above-mentioned rotary compressor.

[0005] According to an embodiment of the utility model, a rotary compressor includes: a shell; a motor, wherein the motor is arranged in the shell and includes a stator, the stator includes a stator core, the outer peripheral wall of the stator core has a plurality of protrusions, the plurality of protrusions are arranged at intervals along the circumferential direction of the stator core, the number of the protrusions is N, at least part of the protrusions are welded to the inner peripheral wall of the shell and the number of welding points is M, and satisfies: 1≤N / M≤4.

[0006] According to the rotary compressor of the embodiment of the utility model, a plurality of protrusions are provided on the outer peripheral wall of the stator core, the number of the protrusions is N, at least some of the protrusions are welded to the inner peripheral wall of the shell and the number of welding points is M, 1≤N / M≤4, so that the contact area between the stator core and the shell can be guaranteed, and the reliability and stability of the connection between the stator core and the shell can be guaranteed while ensuring the performance of the motor, thereby ensuring the fixing force of the stator and the shell, and improving the connection rigidity between the stator and the shell, which can not only improve the problem of welding deformation of the motor, extend the service life of the motor, improve the overall performance of the rotary compressor, but also improve the noise and vibration problems of the rotary compressor.

[0007] In addition, the rotary compressor according to the utility model may also have the following additional technical features:

[0008] In some embodiments, the stator core has a plurality of stator slots spaced apart along a circumferential direction of the stator core, the number of the stator slots is Q, and the following condition is satisfied: QN≥3.

[0009] In some embodiments, the stator core has a plurality of stator slots spaced apart along the circumferential direction of the stator core, the number of the stator slots is Q, the motor also includes a rotor, the rotor is rotatably disposed in the stator, the number of poles of the rotor is P, and satisfies: GCD(Q, P)=5.

[0010] In some embodiments, P satisfies: P≥10.

[0011] In some embodiments, Q satisfies: Q≥15.

[0012] In some embodiments, along the axial direction of the stator, the height of the stator core is H, and satisfies: 4mm≤H / M≤13.5mm.

[0013] In some embodiments, the protrusion has an interference fit or a transition fit with the inner circumferential wall of the shell.

[0014] In some embodiments, M satisfies: M≥3.

[0015] In some embodiments, M satisfies: 360° / M-180° / N≥3°.

[0016] In some embodiments, the weld is point-shaped; or, the weld is strip-shaped extending along the axial direction of the stator; or, the weld includes multiple sub-welds, and the connecting line of the multiple sub-welds forms a triangle; or, the weld includes multiple sub-welds, and the connecting line of the multiple sub-welds forms an ellipse.

[0017] In some embodiments, the welding spot is in the shape of a strip extending along the axial direction of the stator, the length of the welding spot along the axial direction of the stator is L, and satisfies: 0.1 mm ≤ M / L ≤ 0.6 mm.

[0018] In some embodiments, the plurality of welding spots are evenly spaced apart along the circumferential direction of the stator core; or, the plurality of welding spots are unevenly spaced apart along the circumferential direction of the stator core.

[0019] In some embodiments, the shell is a steel part, the thickness of the shell is T, and satisfies: 2mm≤T≤5mm.

[0020] The utility model also provides a refrigeration device having the rotary compressor of the above embodiment.

[0021] According to the refrigeration equipment of the embodiment of the utility model, by providing the above-mentioned rotary compressor, by providing a plurality of protrusions on the outer peripheral wall of the stator core, the number of the protrusions is N, at least some of the protrusions are welded to the inner peripheral wall of the shell and the number of welding points is M, 1≤N / M≤4, the contact area between the stator core and the shell can be guaranteed, while ensuring the reliability and stability of the connection between the stator core and the shell while ensuring the performance of the motor, thereby ensuring the fixing force of the stator and the shell, and improving the connection rigidity between the stator and the shell, which can not only improve the problem of motor welding deformation, extend the service life of the motor, improve the overall performance of the rotary compressor, but also improve the noise and vibration problems of the rotary compressor.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a partial cross-sectional view at one angle of a rotary compressor according to an embodiment of the utility model;

[0025] Figure 2 is a partial cross-sectional view of a rotary compressor according to an embodiment of the utility model at another angle, wherein the welding point is in the shape of a strip extending in the axial direction of the stator;

[0026] Figure 3 is a schematic diagram of a housing and a stator of a rotary compressor according to an embodiment of the utility model, wherein six welding points are evenly spaced along the circumferential direction of the stator;

[0027] Figure 4 is a schematic diagram of a housing and a stator of a rotary compressor according to an embodiment of the utility model, wherein six welding points are unevenly spaced along the circumferential direction of the stator;

[0028] Figure 5 It is a schematic diagram of the rotor of the motor of the rotary compressor according to an embodiment of the utility model.

[0029] Reference numerals:

[0030] 100. Rotary compressor;

[0031] 1. Shell; 11. Welding point;

[0032] 2. Motor; 21. Stator; 211. Stator core; 212. Winding; 213. Protrusion; 214. Stator slot; 22. Rotor; 221. Rotor core; 222. Rotor magnet;

[0033] 3. Crankshaft;

[0034] 4. Compression mechanism; 41. Eccentric block; 42. Outlet;

[0035] 5. Liquid storage tank; 51. Air inlet valve; 52. Air outlet valve. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] A rotary compressor 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0041] like Figure 1 and Figure 2 As shown, the rotary compressor 100 according to the embodiment of the present invention includes a housing 1 and a motor 2 .

[0042] Specifically, refer to the attached Figure 1 and attached Figure 2 As shown, the housing 1 can protect the internal structure of the rotary compressor 100 , prevent the internal structure of the rotary compressor 100 from being exposed and damaged, and extend the service life of the rotary compressor 100 .

[0043] Further, see Attachment Figure 1 and attached Figure 2 As shown, the motor 2 is disposed in the housing 1 and includes a stator 21. The stator 21 can fix the rotor 22 so that the rotor 22 maintains a stable rotation axis, reducing vibration damage to the motor 2 caused by the rotation of the rotor 22, thereby extending the service life of the motor 2.

[0044] Further, see Appendix Figure 1 and attached Figure 2 As shown, the stator 21 includes a stator core 211 and a winding 212. The stator 21 plays an important role in power supply in the motor 2. The winding 212 is an electrical component composed of a conductive coil wound on the stator core 211, and its main function is to generate a rotating magnetic field. The current in the winding 212 will generate a magnetic field on the stator core 211, forming a rotating magnetic field, which in turn drives the rotor 22 to rotate. By changing the magnitude and direction of the current in the winding 212 of the stator 21, the parameters such as the rotation speed, direction and torque of the motor 2 can be controlled, so that the motor 2 can be accurately adjusted and controlled as needed, and is widely used in various electrical appliances and mechanical equipment.

[0045] Further, see the attached Figure 3 and attached Figure 4As shown, the outer peripheral wall of the stator core 211 has a plurality of protrusions 213, and the plurality of protrusions 213 are arranged at intervals along the circumferential direction of the stator core 211, the number of the protrusions 213 is N, at least part of the protrusions 213 are welded to the inner peripheral wall of the shell 1, and the number of welding points 11 is M, and it satisfies: 1≤N / M≤4, the arrangement of the plurality of protrusions 213 can increase the contact area between the stator core 211 and the shell 1, and the limitation of 1≤N / M≤4 can limit the number of welding points 11 connecting the protrusions 213 and the shell 1, which can ensure the performance of the motor 2 while ensuring the reliability and stability of the connection between the stator core 211 and the shell 1, thereby ensuring the fixing force of the stator 21 and the shell 1, and improving the connection rigidity between the stator 21 and the shell 1, which can not only improve the problem of welding deformation of the motor 2, extend the service life of the motor 2, and improve the overall performance of the rotary compressor 100, but also improve the noise and vibration problems of the rotary compressor 100.

[0046] For example, the value of N / M can be 1, 1.5, 2, 2.5, 3, 3.5 or 4. The value of N / M is not less than 1, which can ensure that the number of protrusions 213 is greater than or equal to the number of welding points 11, thereby avoiding damage to the stator 21 due to excessive number of welding points 11; the value of N / M is not greater than 4, which can ensure the reliability and stability of the connection between the stator core 211 and the housing 1, thereby ensuring the fixing force between the stator 21 and the housing 1, and improving the connection rigidity between the stator 21 and the housing 1, which can not only improve the problem of welding deformation of the motor 2, improve the overall performance of the rotary compressor 100, but also improve the noise and vibration problems of the rotary compressor 100.

[0047] In a specific example, see the attached Figure 3 As shown, the number N of protrusions 213 is 12, of which six protrusions 213 are welded to the inner wall of the shell 1, and the number M of welding points 11 between the multiple protrusions 213 and the shell 1 is 6, N / M=2, which can ensure the performance of the motor 2 while ensuring the reliability and stability of the connection between the stator core 211 and the shell 1, thereby ensuring the fixing force of the stator 21 and the shell 1, and improving the connection rigidity between the stator 21 and the shell 1, which can not only improve the problem of welding deformation of the motor 2, improve the overall performance of the rotary compressor 100, but also improve the noise and vibration problems of the rotary compressor 100.

[0048] Optionally, the welding process between the stator core 211 and the shell 1 can be laser welding or argon arc welding. Laser welding has high welding precision, high efficiency and high speed, while argon arc welding has high welding speed, low cost and wide application range.

[0049] Optionally, the sizes of the plurality of protrusions 213 may be the same or different to meet different usage requirements.

[0050] According to the rotary compressor 100 of the embodiment of the utility model, a plurality of protrusions 213 are provided on the outer peripheral wall of the stator core 211, the number of the protrusions 213 is N, at least part of the protrusions 213 are welded to the inner peripheral wall of the shell 1 and the number of welding points 11 is M, 1≤N / M≤4, so that the contact area between the stator core 211 and the shell 1 can be guaranteed, and the reliability and stability of the connection between the stator core 211 and the shell 1 can be guaranteed while ensuring the performance of the motor 2, thereby ensuring the fixing force of the stator 21 and the shell 1, and improving the connection rigidity between the stator 21 and the shell 1, which can not only improve the problem of welding deformation of the motor 2, extend the service life of the motor 2, improve the overall performance of the rotary compressor 100, but also improve the noise and vibration problems of the rotary compressor 100.

[0051] In some embodiments of the present invention, refer to the attached Figure 3 and attached Figure 4 As shown, the stator core 211 has a plurality of stator slots 214 spaced apart along the circumferential direction of the stator core 211, the number of the stator slots 214 is Q, and satisfies: QN≥3. It can be understood that if the number of protrusions 213 is too small, the contact area between the stator core 211 and the housing 1 is too small, which may easily lead to insufficient fixing force between the stator 21 and the housing 1, affecting the connection rigidity between the stator 21 and the housing 1. By limiting QN≥3, the number of protrusions 213 can be guaranteed, so that the contact area between the stator core 211 and the housing 1 is sufficient to ensure the reliability of the connection between the stator 21 and the housing 1, thereby improving the stability and reliability of the motor 2 and extending the service life of the motor 2.

[0052] In a specific example, see the attached Figure 3 and attached Figure 4 As shown, the number N of the protrusions 213 is 12, the number Q of the stator slots 214 is 15, and QN=3, which can ensure that the contact area between the stator core 211 and the housing 1 is sufficient to ensure the reliability of the connection between the stator 21 and the housing 1, thereby improving the stability and reliability of the motor 2 and extending the service life of the motor 2.

[0053] It should be noted that the winding 212 is arranged in the stator slot 214, and the winding 212 can be tightly and orderly placed in multiple stator slots 214. When the winding 212 is energized, the current flows in the winding 212 in the stator slot 214 to generate a magnetic field. This magnetic field interacts with the magnetic field on the rotor 22, thereby generating torque, driving the motor 2 to rotate, and helping to achieve effective conversion of electromagnetic energy.

[0054] It should be noted that the motor 2 generates heat during operation. If the layout of the winding 212 is unreasonable, it may cause local overheating and affect the performance and life of the motor 2. Placing the winding 212 in a plurality of stator slots 214 spaced apart along the circumferential direction of the stator core 211 can increase the heat dissipation area of ​​the winding 212, improve the heat dissipation efficiency of the winding 212, and ensure that the motor 2 can operate stably even in a high temperature environment.

[0055] In addition, the fixing of the winding 212 in the stator slot 214 also helps to improve the mechanical stability of the motor 2. The close fit between the stator slot 214 and the winding 212 can prevent the winding 212 from loosening or shifting during the operation of the motor 2, thereby ensuring the stable operation of the motor 2.

[0056] In some embodiments of the present invention, refer to the attached Figure 3 and attached Figure 4 As shown, the stator core 211 has a plurality of stator slots 214 spaced apart in the circumferential direction of the stator core 211, and the number of the stator slots 214 is Q. Figure 2 and attached Figure 5 As shown, the motor 2 also includes a rotor 22, which is rotatably disposed in the stator 21. The rotor 22 includes a rotor core 221 and a rotor magnet 222. The rotor core 221 is usually made of laminated silicon steel sheets. This structure can enhance the magnetic field of the motor 2, increase the magnetic field strength, and thus enhance the output capacity of the motor 2. In addition, the rotor core 221 can also improve the electromagnetic efficiency of the rotor 22, so that the motor 2 can work more efficiently. It can be understood that a plurality of magnet slots are provided on the rotor core 221, and the plurality of magnet slots are spaced apart along the circumferential direction of the rotor core 221 and each magnet slot is spaced apart in the axial direction of the rotor core 221 (refer to the attached Figure 2 The rotor magnet 222 is arranged in the magnet slot and forms a magnetic pole. Under the action of the current, the rotor magnet 222 interacts with the magnetic field in the stator core 211 and the rotor core 221 to generate a rotational torque to drive the motor 2 to work.

[0057] Furthermore, the number of poles of the rotor 22 is P, that is, the number of magnetic poles of the rotor 22 is P, and satisfies: GCD(Q, P) = 5. It can be understood that the greatest common divisor of the number of stator slots 214 and the number of poles of the rotor 22 is 5. At this time, the vibration of the stator 21 caused by the electromagnetic excitation force of the motor 2 is significantly reduced, thereby reducing the noise generated by the rotary compressor 100.

[0058] In a further embodiment of the present invention, P satisfies: P ≥ 10. It can be understood that the number of poles P of the rotor 22 can be 10, 15, 20, 30, 40, 50, 60, 70 or 80, that is, the number of magnetic poles of the rotor 22 can be 10, 15, 20, 30, 40, 50, 60, 70 or 80. There is a certain relationship between the rotation speed of the rotor 22 and the number of poles. The more the number of poles of the rotor 22, the lower the synchronous speed of the rotor 22. The number of poles P of the rotor 22 is not less than 10, which can improve the torque output capacity of the rotor 22, and can satisfy GCD (Q, P) = 5, reduce the vibration of the stator 21 caused by the electromagnetic excitation force of the motor 2, and thus reduce the noise generated by the rotary compressor 100. In a specific example, the number of poles P of the rotor 22 is 10, which can improve the torque output capacity of the rotor 22 and satisfy GCD(Q, P)=5, reducing the vibration of the stator 21 caused by the electromagnetic excitation force of the motor 2, thereby reducing the noise generated by the rotary compressor 100.

[0059] In a further embodiment of the present invention, refer to the attached Figure 3 and attached Figure 4 As shown, Q satisfies: Q ≥ 15. It can be understood that the number Q of the stator slots 214 can be 15, 20, 25, 30, 35, 40, 45 or 50. At this time, the winding 212 can be tightly and orderly placed in multiple stator slots 214, which can increase the heat dissipation area of ​​the winding 212, improve the heat dissipation efficiency, and ensure that the motor 2 can run stably in a high temperature environment. At this time, GCD (Q, P) = 5 can be satisfied, reducing the vibration of the stator 21 caused by the electromagnetic excitation force of the motor 2, thereby reducing the noise generated by the rotary compressor 100. In a specific example, refer to the attached Figure 3 and attached Figure 4 As shown, the number Q of the stator slots 214 is 15, which can increase the heat dissipation area of ​​the winding 212, improve the heat dissipation efficiency, and ensure that the motor 2 can operate stably even in a high temperature environment. At this time, GCD (Q, P) = 5 can be satisfied, reducing the vibration of the stator 21 caused by the electromagnetic excitation force of the motor 2, thereby reducing the noise generated by the rotary compressor 100.

[0060] In some embodiments of the present invention, refer to the attached Figure 1 As shown, along the axial direction of the stator 21 (see Appendix Figure 1The stator core 211 is in the vertical direction shown in the figure, and the height of the stator core 211 is H, and satisfies: 4mm≤H / M≤13.5mm. It can be understood that the greater the height of the stator core 211, the longer the length of the welding point 11 that can be set along the axial direction of the stator 21, so that the area of ​​the welding point 11 can be set larger, and the connection area between the stator core 211 and the housing 1 becomes larger accordingly, which can further improve the reliability and stability of the connection between the stator core 211 and the housing 1, ensure the fixing force of the stator 21 and the housing 1, improve the connection rigidity between the stator 21 and the housing 1, and ensure the service life of the motor 2. For example, the value of H / M can be 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm or 13.5mm, the number M of the welding points 11 remains constant, the greater the height H of the stator core 211, the longer the length of a single welding point 11 that can be set along the axial direction of the stator 21, and the more reliable the connection between the stator 21 and the housing 1.

[0061] In some embodiments of the utility model, the protrusion 213 and the inner circumferential wall of the shell 1 are interference fit or transition fit. When the protrusion 213 and the inner circumferential wall of the shell 1 are interference fit, the protrusion 213 can be first clamped in the shell 1 through thermal expansion and contraction, and then the motor 2 and the shell 1 are further fixed by welding, so as to ensure the fixing force of the stator core 211 and the shell 1, improve the connection rigidity between the stator 21 and the shell 1, extend the service life of the motor 2, and reduce the maintenance frequency of the rotary compressor 100; when the protrusion 213 and the inner circumferential wall of the shell 1 are transition fit, it is convenient to place the motor 2 in the shell 1, facilitate the assembly and fixation of the motor 2, reduce the assembly difficulty of the motor 2, and improve the assembly efficiency of the rotary compressor 100.

[0062] In some embodiments of the present invention, refer to the attached Figure 3 and attached Figure 4 As shown, M satisfies: M≥3. By limiting the number of welding points 11 to be greater than 3, it is possible to ensure that the welding position of the protrusion 213 and the housing 1 is sufficient, and the reliability and stability of the connection between the stator core 211 and the housing 1 can be ensured, thereby ensuring the fixing force of the stator 21 and the housing 1, improving the connection rigidity between the stator 21 and the housing 1, improving the problem of welding deformation of the motor 2, and extending the service life of the motor 2. For example, the number M of the welding points 11 can be 3, 4, 5, 6, 7, 8, 9 or 10, which can ensure the reliability and stability of the connection between the stator core 211 and the housing 1, thereby ensuring the fixing force of the stator 21 and the housing 1.

[0063] In a specific example, see the attached Figure 3 and attached Figure 4As shown, the number M of welding points 11 is 6, which can ensure that the welding position between the protrusion 213 and the shell 1 is sufficient, and can ensure the reliability and stability of the connection between the stator core 211 and the shell 1, thereby ensuring the fixing force between the stator 21 and the shell 1, improving the connection rigidity between the stator 21 and the shell 1, improving the problem of welding deformation of the motor 2, and extending the service life of the motor 2.

[0064] In some embodiments of the present invention, refer to the attached Figure 3 and attached Figure 4 As shown, M satisfies: 360° / M-180° / N≥3°. It can be understood that multiple welding points 11 can be provided on the same protrusion 213, and the distance between two adjacent welding points 11 cannot be too close, which may easily penetrate the shell 1 or burn the stator 21, thereby causing damage to the shell 1 or the stator 21, resulting in increased production and processing costs of the rotary compressor 100. In addition, due to limitations of processing equipment, it is impossible to weld two welding points 11 too close. Therefore, limiting 360° / M-180° / N≥3° can also ensure the connection reliability between the motor 2 and the shell 1, and facilitate the production and processing of the rotary compressor 100.

[0065] For example, 360° / M-180° / N can be 3°, 4°, 5°, 6° or 7°, which can facilitate the welding connection between the motor 2 and the housing 1, avoid damage to the housing 1 or the stator 21 during the welding process, and ensure the production and processing of the rotary compressor 100. In a specific example, refer to the attached Figure 3 As shown, the number N of protrusions 213 is 12, of which six protrusions 213 are welded to the inner wall of the shell 1, and the number M of welding points 11 between the multiple protrusions 213 and the shell 1 is 6, 360° / M-180° / N=45°, which can facilitate the welding connection between the motor 2 and the shell 1, avoid damage to the shell 1 or the stator 21 during the welding process, and ensure the production and processing of the rotary compressor 100.

[0066] In some embodiments of the utility model, the welding point 11 is point-shaped, the welding speed is fast, only electric energy is consumed, no filling material or flux, gas, etc. are required, and the degree of mechanization and automation is high, which can improve the processing efficiency of the connection between the stator core 211 and the shell 1 and improve the productivity of the rotary compressor 100.

[0067] Or, refer to the attached Figure 2 As shown, the welding spot 11 is in the shape of a strip extending along the axial direction of the stator 21 . The processing equipment required for welding is simple, maintenance is convenient, operation is flexible, and adaptability is strong, which can reduce the difficulty of welding the stator core 211 and the housing 1 .

[0068] Alternatively, the welding point 11 includes a plurality of sub-welding points, and the connecting lines of the plurality of sub-welding points form a triangle, which helps to disperse the welding stress and make the force more uniform through the bite of the fillet weld, thereby improving the connection strength and stability between the stator core 211 and the housing 1.

[0069] Alternatively, the welding point 11 includes a plurality of sub-welding points, and the connecting line of the plurality of sub-welding points forms an ellipse, which can ensure a firm connection between the stator core 211 and the housing 1, has high strength and sealing, and can withstand greater pressure and temperature.

[0070] It should be noted that the shape of the welding spot 11 can be freely selected according to different welding requirements, workpiece materials, equipment conditions and other factors, so as to facilitate the production and processing of the rotary compressor 100.

[0071] In a further embodiment of the present invention, refer to the attached Figure 2 As shown, the welding spot 11 is a strip extending in the axial direction of the stator 21, and the length of the welding spot 11 in the axial direction of the stator 21 is L, and satisfies: 0.1mm≤M / L≤0.6mm. It can be understood that the longer the length of the welding spot 11 in the axial direction of the stator 21, the larger the area of ​​a single welding spot 11 can be set, and the more reliable the connection between the stator core 211 and the housing 1 is. Even if the number of welding spots 11 is appropriately reduced, the retention force between the stator core 211 and the housing 1 can still meet the requirements, thereby ensuring the reliability of the connection between the stator 21 and the housing 1. In one example, refer to the attached Figure 2 As shown, the length of the welding spot 11 along the axial direction of the stator 21 is 20 mm, the number M of the welding spots 11 is 6, and the value of M / L is 0.3, which can ensure the reliability of the connection between the stator 21 and the housing 1.

[0072] In some embodiments of the present invention, refer to the attached Figure 3 As shown, multiple welding points 11 are evenly spaced along the circumferential direction of the stator core 211, which can make the connection points between the stator core 211 and the shell 1 evenly spaced, ensure the uniform stress of the connection between the stator core 211 and the shell 1, ensure the reliability and stability of the connection between the stator core 211 and the shell 1, and thus ensure the fixing force between the stator 21 and the shell 1.

[0073] Or, refer to the attached Figure 4 As shown, multiple welding points 11 are unevenly spaced along the circumferential direction of the stator core 211, so that the positions of the welding points 11 can be adjusted according to the environment of the outer wall surface of the shell 1, which is convenient for welding the stator 21 and the shell 1 and for the production and processing of the rotary compressor 100.

[0074] In some embodiments of the utility model, the shell 1 is a steel part. Specifically, the shell 1 can be a cold-rolled steel plate or a hot-rolled steel plate. The cold-rolled steel plate has good surface quality, high flatness, high dimensional accuracy, high material hardness, and good wear resistance, which can ensure the production quality of the shell 1. The hot-rolled steel plate has high strength, good toughness, good corrosion resistance, good wear resistance, good plasticity and machinability, and can facilitate the production and processing of the shell 1.

[0075] Further, see Attachment Figure 3 and attached Figure 4 As shown, the thickness of the shell 1 is T, and satisfies: 2mm≤T≤5mm. It can be understood that the thickness of the shell 1 T≥2mm can meet the rigidity requirements of the shell 1, improve the reliability of the shell 1, and give full play to the protective effect of the shell 1; the thickness of the shell 1 T≤5mm can avoid the inability to transfer welding heat due to the thickness of the shell 1 being too thick, thereby affecting the normal welding of the stator 21 and the shell 1.

[0076] In some embodiments of the present invention, refer to the attached Figure 1 and attached Figure 2 As shown, the rotary compressor 100 further includes a crankshaft 3 and a compression mechanism 4, both of which are arranged in the housing 1, and the length direction of the crankshaft 3 (see attached Figure 1 The two ends of the upper and lower directions (as shown) are respectively connected to the rotor 22 and the compression mechanism 4. When the motor 2 is working and the rotor 22 rotates, the rotor 22 drives the crankshaft 3 to rotate, and transmits the rotation to the compression mechanism 4 through the crankshaft 3.

[0077] For example, Figure 1 As shown, the compression mechanism 4 is provided with an eccentric block 41, which is fixed on the crankshaft 3, and the position of the eccentric block 41 is offset from the center of the crankshaft 3. When the crankshaft 3 rotates, the position of the eccentric block 41 will also change. This change in position will produce different degrees of compression on the gas in the rotary compressor 100, and the low-temperature gaseous refrigerant can be compressed into a high-temperature and high-pressure gaseous refrigerant, thereby controlling the exhaust volume and pressure of the rotary compressor 100, providing power for the refrigeration cycle, and realizing the refrigeration cycle of compression → condensation → expansion → evaporation (heat absorption).

[0078] Further, see Attachment Figure 1 and attached Figure 2As shown, the rotary compressor 100 also includes a liquid storage tank 5, in which a gas-liquid separator is provided. The refrigerant enters the liquid storage tank 5 through an air inlet valve 51 of the liquid storage tank 5, and is separated into gaseous refrigerant and liquid refrigerant under the action of the gas-liquid separator. The gaseous refrigerant enters the compression mechanism 4 through an air outlet valve 52. The compression mechanism 4 can compress the low-temperature gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, thereby controlling the exhaust volume and pressure of the rotary compressor 100, providing power for the refrigeration cycle, thereby realizing the refrigeration cycle of compression → condensation → expansion → evaporation (heat absorption).

[0079] Reference below Figures 1 to 5 The rotary compressor 100 according to two specific embodiments of the present invention is described. It is worth noting that the following description is merely exemplary and is intended to be used to explain the present invention, but cannot be construed as a limitation on the present invention.

[0080] Embodiment 1

[0081] Specifically, Figures 1 to 5 As shown, the rotary compressor 100 includes: a housing 1 and a motor 2, a crankshaft 3, a compression mechanism 4 and a liquid storage tank 5.

[0082] Furthermore, the housing 1 is a steel part, and the thickness T of the housing 1 satisfies: 2mm≤T≤5mm. The motor 2 is arranged in the housing 1 and includes a stator 21 and a rotor 22. The rotor 22 is rotatably arranged in the stator 21. The stator 21 can fix the rotor 22, so that the rotor 22 maintains a stable rotation axis, and reduces the vibration damage of the motor 2 caused by the rotation of the rotor 22, thereby extending the service life of the motor 2. The stator 21 includes a stator core 211 and a winding 212. The stator 21 plays an important role in power supply in the motor 2. The stator core 211 has a plurality of stator slots 214 spaced apart along the circumferential direction of the stator core 211. The winding 212 is an electrical component wound by a conductive coil on the stator core 211. The winding 212 is arranged in the stator slot 214, and its main function is to generate a rotating magnetic field. The current in the winding 212 will generate a magnetic field on the stator core 211, forming a rotating magnetic field, and then drive the rotor 22 to rotate.

[0083] Furthermore, the outer wall of the stator core 211 has twelve protrusions 213, and the twelve protrusions 213 are arranged at intervals along the circumferential direction of the stator core 211. The number N of the protrusions 213 is 12. The protrusions 213 have an interference fit or a transition fit with the inner wall of the shell 1. The six protrusions 213 are welded to the inner wall of the shell 1 and the number M of the welding points 11 is 6. The six welding points 11 are evenly spaced along the circumferential direction of the stator core 211, N / M=2, 360° / M-180° / N=45°, which can ensure the reliability and stability of the connection between the stator core 211 and the shell 1 while ensuring the performance of the motor 2, thereby ensuring the fixing force of the stator 21 and the shell 1, and improving the connection rigidity between the stator 21 and the shell 1, which can not only improve the problem of welding deformation of the motor 2, extend the service life of the motor 2, and improve the overall performance of the rotary compressor 100, but also improve the noise and vibration problems of the rotary compressor 100.

[0084] Furthermore, the number Q of the stator slots 214 is 15, QN=3, which can ensure the number of protrusions 213, so that the contact area between the stator core 211 and the housing 1 is sufficient to ensure the reliability of the connection between the stator 21 and the housing 1, thereby improving the stability and reliability of the motor 2 and extending the service life of the motor 2. The number of poles P of the rotor 22 is 10, GCD (Q, P) = 5, and the greatest common divisor of the number of stator slots 214 and the number of poles of the rotor 22 is 5. At this time, the vibration of the stator 21 caused by the electromagnetic excitation force of the motor 2 is significantly reduced, thereby reducing the noise generated by the rotary compressor 100.

[0085] In addition, along the axial direction of the stator 21, the height of the stator core 211 is H, and satisfies: 4mm≤H / M≤13.5mm. It can be understood that the greater the height of the stator core 211, the longer the length of the welding point 11 that can be set along the axial direction of the stator 21, and thus the larger the area of ​​the welding point 11 that can be set, the larger the connection area between the stator core 211 and the housing 1 becomes, and the reliability and stability of the connection between the stator core 211 and the housing 1 can be further improved, the fixing force of the stator 21 and the housing 1 can be ensured, the connection rigidity between the stator 21 and the housing 1 can be improved, and the service life of the motor 2 can be ensured.

[0086] Furthermore, the welding spot 11 is in the shape of a strip extending along the axial direction of the stator 21, and the length of the welding spot 11 along the axial direction of the stator 21 is L, and satisfies: 0.1mm≤M / L≤0.6mm. The longer the length of the welding spot 11 along the axial direction of the stator 21, the larger the area of ​​a single welding spot 11 can be set, and the more reliable the connection between the stator core 211 and the shell 1 is. Even if the number of welding spots 11 is appropriately reduced, the retaining force between the stator core 211 and the shell 1 can still meet the requirements, thereby ensuring the reliability of the connection between the stator 21 and the shell 1.

[0087] In addition, the crankshaft 3 and the compression mechanism 4 are both arranged in the housing 1, and the two ends of the crankshaft 3 in the length direction are connected to the rotor 22 and the compression mechanism 4 respectively. When the motor 2 is working and the rotor 22 rotates, the rotor 22 drives the crankshaft 3 to rotate, and transmits the rotation to the compression mechanism 4 through the crankshaft 3. A gas-liquid separation component is arranged in the liquid storage tank 5. The refrigerant enters the liquid storage tank 5 through the air inlet valve 51 of the liquid storage tank 5, and is separated into gaseous refrigerant and liquid refrigerant under the action of the gas-liquid separation component. The gaseous refrigerant enters the compression mechanism 4 through the air outlet valve 52. The compression mechanism 4 can compress the low-temperature gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, thereby controlling the exhaust volume and pressure of the rotary compressor 100, providing power for the refrigeration cycle, and realizing the refrigeration cycle of compression → condensation → expansion → evaporation (heat absorption).

[0088] Embodiment 2

[0089] The structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are marked with the same reference numerals, and the only difference is that the six welding points 11 are unevenly spaced along the circumferential direction of the stator core 211, so that the positions of the welding points 11 can be adjusted according to the environment of the outer wall surface of the shell 1, thereby facilitating the welding of the stator 21 and the shell 1, and facilitating the production and processing of the rotary compressor 100.

[0090] The utility model also provides a refrigeration device having the rotary compressor 100 of the above embodiment.

[0091] According to the refrigeration equipment of the embodiment of the utility model, by providing the above-mentioned rotary compressor 100, by providing a plurality of protrusions 213 on the outer peripheral wall of the stator core 211, the number of the protrusions 213 is N, at least part of the protrusions 213 are welded to the inner peripheral wall of the shell 1 and the number of welding points 11 is M, 1≤N / M≤4, the contact area between the stator core 211 and the shell 1 can be guaranteed, while ensuring the performance of the motor 2 and ensuring the reliability and stability of the connection between the stator core 211 and the shell 1, thereby ensuring the fixing force of the stator 21 and the shell 1, and improving the connection rigidity between the stator 21 and the shell 1, which can not only improve the problem of welding deformation of the motor 2, extend the service life of the motor 2, improve the overall performance of the rotary compressor 100, but also improve the noise and vibration problems of the rotary compressor 100.

[0092] The other structures and operations of the rotary compressor 100 and the refrigeration device according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0094] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotary compressor, characterized in that: include: case; A motor, the motor is arranged in the shell and includes a stator, the stator includes a stator core, the outer peripheral wall of the stator core has a plurality of protrusions, the plurality of protrusions are arranged at intervals along the circumferential direction of the stator core, the number of the protrusions is N, at least part of the protrusions are welded to the inner peripheral wall of the shell and the number of welding points is M, and it satisfies: 1≤N / M≤4.

2. The rotary compressor according to claim 1, characterized in that: The stator core has a plurality of stator slots spaced apart along a circumferential direction of the stator core, the number of the stator slots is Q, and the following condition is satisfied: QN≥3.

3. The rotary compressor according to claim 1, characterized in that: The stator core has a plurality of stator slots spaced apart along the circumferential direction of the stator core, the number of the stator slots is Q, the motor further comprises a rotor rotatably disposed in the stator, the number of poles of the rotor is P, and satisfies: GCD(Q, P)=5.

4. The rotary compressor according to claim 3, characterized in that: P satisfies: P≥10.

5. The rotary compressor according to any one of claims 2 to 4, characterized in that: Q satisfies: Q≥15.

6. The rotary compressor according to claim 1, characterized in that: Along the axial direction of the stator, the height of the stator core is H, and satisfies: 4mm≤H / M≤13.5mm.

7. The rotary compressor according to claim 1, characterized in that: The protrusion is interference fit or transition fit with the inner peripheral wall of the shell.

8. The rotary compressor according to claim 1, characterized in that: M satisfies: M≥3.

9. The rotary compressor according to claim 1, characterized in that: M satisfies: 360° / M-180° / N≥3°.

10. The rotary compressor according to claim 1, characterized in that The welding point is point-shaped; Or, the welding spot is in the shape of a strip extending along the axial direction of the stator; Or, the solder joint includes a plurality of sub-solder joints, and a connecting line of the plurality of sub-solder joints forms a triangle; Alternatively, the solder joint includes a plurality of sub-solder joints, and a connecting line of the plurality of sub-solder joints forms an ellipse.

11. The rotary compressor according to claim 10, characterized in that: The welding spot is in the shape of a strip extending along the axial direction of the stator, the length of the welding spot along the axial direction of the stator is L, and satisfies: 0.1 mm≤M / L≤0.6 mm.

12. The rotary compressor according to claim 1, characterized in that The plurality of welding points are evenly spaced along the circumferential direction of the stator core; Alternatively, the plurality of welding points are unevenly spaced along the circumferential direction of the stator core.

13. The rotary compressor according to claim 1, characterized in that The shell is a steel part, the thickness of the shell is T, and satisfies: 2mm≤T≤5mm.

14. A refrigeration device, characterized in that: Comprising a rotary compressor according to any one of claims 1-13.

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