Rotary compressor and refrigeration equipment
By setting the stator and rotor in the motor of the rotary compressor and improving their rigidity through fixed connectors, the problem of large vibration noise caused by insufficient rigidity of the existing rotary compressor motor is solved, and the effect of reducing vibration noise is achieved.
Patent Information
- Application Number
- CN202421874900.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The existing rotary compressors have low motor rigidity, resulting in high vibration noise and room for improvement.
By providing the stator and the rotor in the motor of the rotary compressor, the stator jacket is on the rotor, the stator core is in contact with the housing, the rotor core includes a plurality of stacked rotor laminates, and is fixedly connected by fixed connections to ensure the rigidity of the stator core and the rotor core.
It improves the rigidity of the motor, reduces the vibration noise of the motor during operation, and reduces the vibration noise of the rotary compressor during operation.
Smart Images
Figure CN223018922U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, and particularly relates to a rotary compressor and a refrigeration device. Background Art
[0002] In related technologies, the rigidity of the motor of the existing rotary compressor is relatively low, resulting in easy vibration and relatively high working noise of the rotary compressor during operation, and there is room for improvement. Summary of the Utility Model
[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. To this end, an object of the utility model is to provide a rotary compressor with low vibration and noise.
[0004] The utility model also provides a refrigeration device.
[0005] The rotary compressor according to the first aspect embodiment of the utility model includes: a housing; a motor disposed in the housing, the motor including a stator and a rotor, the stator being sleeved outside the rotor, the stator including a stator core in contact with the housing, the stator core having a plurality of stator slots for placing stator windings, the number of stator slots being Q, the number of poles of the rotor being P, the rotor including a rotor core, the rotor core including a plurality of stacked rotor laminations, and the plurality of rotor laminations being fixedly connected by fixing connectors passing through in the stacking direction thereof. Wherein, the number of fixing connectors is N, the diameter of the fixing holes of the rotor core for passing the fixing connectors is D1 mm, the outer diameter of the rotor core is D2 mm, the axial height dimension of the rotor core is H1 mm, the circumferential length of the stator in contact with the housing is L mm, and the outer diameter of the stator core is D3 mm. The rotary compressor satisfies: 5 ≤ GCD(Q, P) ≤ 6, where GCD(Q, P) is the greatest common divisor of the number of stator slots and the number of poles of the rotor.
[0006] By correlating D1, D2, D3, L, N, P, Q, and H1, that is with and by defining with the numerical range of, the rigidity of the stator core and the rotor core can be improved, the rigidity of the motor can be improved, which is beneficial to reducing the gap between the electrical frequency and the mechanical frequency of the motor, thereby being beneficial to reducing the vibration and noise of the motor during operation and reducing the vibration and noise of the rotary compressor during operation.
[0007] According to some embodiments of the utility model, the rotary compressor satisfies:
[0008] In some examples, the height dimension of the rotor core on the central axis of the rotor is H1 mm, and the rotary compressor satisfies: 25 ≤ H1 ≤ 35.
[0009] According to some embodiments of the present invention, the motor is in interference fit with the housing. The outer diameter of the stator core is D3 mm, and the inner diameter of the housing is D4 mm, satisfying: 0.02 ≤ D3 - D4 ≤ 0.08; and / or, the motor is welded to the housing.
[0010] According to some embodiments of the present invention, the rotor core is provided with a plurality of magnets. The magnetic pole polarities of two adjacent magnets are opposite, and the angular interval between two adjacent magnets is θ°, and the rotary compressor satisfies: 30 ≤ θ ≤ 36.
[0011] According to some embodiments of the present invention, the number of poles of the rotor is P, satisfying: 10 ≤ P ≤ 12.
[0012] According to some embodiments of the present invention, the rotor core is provided with a through-flow channel axially penetrating therethrough.
[0013] In some examples, in the radial direction of the rotor core, the plurality of fixing holes are distributed outside the through-flow channel.
[0014] In some examples, in the radial direction of the rotor core, the minimum distance between the through-flow channel and the fixing holes is D5, satisfying: 5 ≤ D5 ≤ 12.
[0015] According to some embodiments of the present invention, the number of phases of the stator winding is m, and the number of slots per pole per phase of the motor is q, satisfying:
[0016] The refrigeration device according to the embodiment of the second aspect of the present invention includes the rotary compressor according to the embodiment of the first aspect of the present invention. By adopting the above-mentioned rotary compressor, the rigidity of the motor can be improved, which is beneficial to reducing the gap between the electrical frequency and the mechanical frequency of the motor, thereby being beneficial to reducing the vibration and noise of the rotary compressor during operation and reducing the vibration and noise of the refrigeration device during operation.
[0017] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:
[0019] Figure 1 is a schematic structural view of a rotary compressor according to some embodiments of the present utility model;
[0020] Figure 2 is a schematic partial structural view of a rotary compressor according to some embodiments of the present utility model;
[0021] Figure 3 is a schematic partial structural view of a motor according to some embodiments of the present utility model;
[0022] Figure 4 is a schematic structural view of a stator core according to some embodiments of the present utility model;
[0023] Figure 5 is a schematic structural view of a rotor according to some embodiments of the present utility model.
[0024] Reference numerals:
[0025] rotary compressor 1000, motor 100,
[0026] housing 10,
[0027] stator 20, stator core 21, stator slots 211, stator winding 22,
[0028] rotor 30, rotor core 31, through-flow channel 311, fixing holes 312, magnets 32. Detailed implementation manners
[0029] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.
[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.
[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0032] Next, reference is made to Figures 1 - 5 Describe a rotary compressor 1000 according to an embodiment of the present utility model.
[0033] As Figures 1 - 5 shown, a rotary compressor 1000 according to an embodiment of the present utility model includes: a housing 10 and a motor 100.
[0034] The motor 100 may be disposed within the housing 10. The motor 100 includes a stator 20 and a rotor 30. The stator 20 may be sleeved on the outer periphery of the rotor 30. The stator 20 includes a stator core 21. The stator core 21 may be in contact with the housing 10. The stator core 21 has a plurality of stator slots 211 for placing stator windings 22. The rotor 30 includes a rotor core 31 and magnets 32. The magnets 32 may be disposed within the rotor core 31 to generate a permanent magnetic field in the rotor 30. After the stator windings 22 are energized, the stator windings 22 may generate a rotating magnetic field in the stator 20. The rotating magnetic field of the stator 20 may drive the permanent magnetic field of the rotor 30 to rotate, thereby driving the rotor 30 to rotate relative to the stator 20, and ensuring the normal operation of the motor 100.
[0035] The number of stator slots 211 is Q, the number of poles of the rotor 30 is P, GCD(Q, P) is the greatest common divisor of the number of stator slots 211 and the number of poles of the rotor 30, and GCD(Q, P) can represent the order of the minimum electromagnetic force generated by the motor 100. The vibration of the motor 100 is approximately inversely proportional to the fourth power of the order of the electromagnetic force of the motor 100. If the order of the electromagnetic force of the motor 100 is too small, the vibration of the motor 100 is too large, which affects the working stability of the motor 100 and is prone to generate relatively large noise. If the order of the electromagnetic force of the motor 100 is too large, it is easy to increase the complexity of the motor 100's electronic control, which affects the working reliability of the motor 100.
[0036] Therefore, Q, P, and GCD(Q, P) can be determined according to actual design requirements. For example, GCD(Q, P) can be limited within the range of 5 - 6, that is, GCD(Q, P) can be 5 or 6. When GCD(Q, P) = 5, the number of poles of the rotor 30 can be 10, and the number of stator slots 211 can be 15. When GCD(Q, P) = 6, the number of poles of the rotor 30 can be 12, and the number of stator slots 211 can be 18. This is beneficial to reducing the vibration degree of the motor 100, beneficial to reducing the noise of the motor 100, can improve the working stability of the motor 100, and at the same time is beneficial to simplifying the electronic control of the motor 100 and improving the working reliability of the motor 100.
[0037] The rotor core 31 includes a plurality of rotor laminations, and the plurality of rotor laminations are stacked on top of each other, which is beneficial to reducing the eddy current loss of the motor 100 and improving the working efficiency of the motor 100. The plurality of rotor laminations can be fixedly connected by fixing connectors. That is, the fixing connectors can pass through the plurality of rotor laminations along the stacking direction of the plurality of rotor laminations (such as Figure 2 the up and down direction shown) to press the plurality of rotor laminations, which can improve the fixing effect on the plurality of rotor laminations.
[0038] In other words, the rotor core 31 has fixing holes 312, and the fixing connectors can pass through the fixing holes 312 to press the rotor core 31 in the axial direction of the rotor core 31 (such as Figure 2 the up and down direction shown), thereby improving the rigidity of the rotor core 31, which is beneficial to reducing the vibration degree of the rotor core 31 during rotation and is beneficial to reducing the noise of the rotor core 31 during rotation. It can be understood that the fixing connectors can be rivets, and the fixing holes 312 can be rivet holes. The rivets can pass through the rivet holes to rivet the plurality of rotor laminations to realize the pressing of the rotor core 31 in the axial direction.
[0039] The number of fixing connectors is N, the diameter of the fixing holes 312 is D1 mm, the outer diameter of the rotor core 31 is D2 mm, the axial direction of the rotor core 31 (such as Figure 2The height dimension in the up-down direction shown is H1 mm. If N is too large, the number of fixed connectors is excessive, which will lead to a too large difference between the copper loss and iron loss of the motor 100, resulting in a too large difference between the variable loss and constant loss of the motor 100, affecting the working efficiency of the motor 100. If N is too small, the number of fixed connectors is too small, which will cause the fixed connectors to be difficult to tightly press the rotor core 31, reducing the rigidity of the rotor core 31 and affecting the vibration noise of the rotor core 31 during rotation.
[0040] If D1 is too large, the size of the fixed connector is too large, which will lead to a too large difference between the copper loss and iron loss of the motor 100, resulting in a too large difference between the variable loss and constant loss of the motor 100, affecting the working efficiency of the motor 100. If D1 is too small, the size of the fixed connector is too small, which will cause the fixed connectors to be difficult to tightly press the rotor core 31, reducing the rigidity of the rotor core 31 and affecting the vibration noise of the rotor core 31 during rotation.
[0041] If P is too large, the number of magnets 32 in the rotor core 31 is relatively large, which will reduce the rigidity of the rotor core 31 and it is difficult to ensure the safe operation of the motor 100. If P is too small, the number of magnets 32 in the rotor core 31 is relatively small, which is likely to affect the performance of the motor 100. If D2 is too large, it will increase the size of the rotor core 31, which will cause the fixed connectors to be difficult to tightly press the rotor core 31, reducing the rigidity of the rotor core 31 and affecting the vibration noise of the rotor core 31 during rotation. If D2 is too small, it will lead to a too large difference between the copper loss and iron loss of the motor 100, resulting in a too large difference between the variable loss and constant loss of the motor 100, affecting the working efficiency of the motor 100.
[0042] If H1 is too large, the fixed connector is too long, which will cause the fixed connectors to be difficult to tightly press the rotor core 31, reducing the rigidity of the rotor core 31 and affecting the vibration noise of the rotor core 31 during rotation. If H1 is too small, the fixed connector is too short, which will lead to a too large difference between the copper loss and iron loss of the motor 100, resulting in a too large difference between the variable loss and constant loss of the motor 100, affecting the working efficiency of the motor 100.
[0043] Therefore, D1, N, P, D2, and H1 can be associated together, that is And it can be limited to be between 0.05 and 0.5, It can be any one of the point values of 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5 or the range value between any two of them. On the basis of ensuring the normal operation of the motor 100, the copper loss and iron loss of the motor 100 can be at a relatively average level, and the variable loss and constant loss of the motor 100 can be at a relatively average level, which can improve the working efficiency of the motor 100. At the same time, the rigidity of the rotor core 31 can be improved, which is beneficial to reducing the vibration degree of the rotor core 31 during rotation and is beneficial to reducing the noise of the rotor core 31 during rotation.
[0044] The circumferential length of the stator 20 in contact with the housing 10 is L mm, and the outer diameter of the stator core 21 is D3 mm, that is, the circumference of the stator core 21 is π * D3. If L is too large or π * D3 is too small, the wall thickness between the stator slot 211 and the outer wall of the stator core 21 is too thin, which will affect the rigidity of the stator core 21 and the vibration noise of the stator core 21 during the rotation of the rotor core 31. If L is too small or π * D3 is too large, the contact area between the stator core 21 and the housing 10 is too small, which will result in too small connection rigidity between the stator core 21 and the housing 10, resulting in a poor elliptical triangular mode of the stator core 21 during vibration, affecting the rigidity of the stator core 21 and the vibration noise of the stator core 21 during the rotation of the rotor core 31.
[0045] If Q is too large, the number of stator slots 211 is too many, which will cause the wall thickness between the stator slots 211 and the outer wall of the stator core 21 to be too thin, affecting the rigidity of the stator core 21 and the vibration noise of the stator core 21 during the rotation of the rotor core 31. If Q is too small, the number of stator slots 211 is too few, which will cause the number of stator windings 22 to be too few, easily affecting the performance of the motor 100.
[0046] Therefore, L, D3 and Q can be associated together, that is And it can be Limited between 5 and 12, It can be any one of the point values of 5, 6, 7, 8, 9, 10, 11, 12 or the range value between any two of them. On the basis of ensuring the normal operation of the motor 100, the connection rigidity between the stator core 21 and the housing 10 can be improved, and the rigidity of the stator core 21 can be improved, which is beneficial to reducing the vibration degree of the stator core 21 during the rotation of the rotor core 31 and is beneficial to reducing the noise of the stator core 21 during the rotation of the rotor core 31.
[0047] According to the rotary compressor 1000 of the embodiment of the present invention, by associating D1, D2, D3, L, N, P, Q and H1, that is With And by limiting With the numerical range of, the rigidity of the stator core 21 and the rotor core 31 can be improved, the rigidity of the motor 100 can be improved, which is beneficial to reducing the gap between the electrical frequency and the mechanical frequency of the motor 100, and thus is beneficial to reducing the vibration noise of the motor 100 during operation and reducing the vibration noise of the rotary compressor 1000 during operation.
[0048] Such as Figure 2 and Figure 5 shown, according to some embodiments of the present invention, the values of D1, N, P, D2 and H1 corresponding in the rotary compressor 1000 of various embodiments are different. For example, can be limited between 0.07 - 0.2, can be any one of the point values of 0.07, 0.1, 0.12, 0.14, 0.16, 0.18, 0.2 or the range value between any two of them. On the basis of ensuring the normal operation of the motor 100, the rigidity of the rotor core 31 can be further improved, and the vibration noise of the rotor core 31 during rotation can be reduced.
[0049] Among them, H1 can be limited between 25 - 35. H1 can be any one of the point values of 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 or the range value between any two of them. On the basis of reducing the vibration noise of the rotor core 31 during rotation, the copper loss and iron loss of the motor 100 can be at a relatively average level, and the variable loss and constant loss of the motor 100 can be at a relatively average level, which can improve the working efficiency of the motor 100.
[0050] Such as Figure 1 、 Figure 3 and Figure 4 shown, according to some embodiments of the present invention, the motor 100 can be in interference fit with the housing 10, which can improve the connection rigidity between the stator core 21 and the housing 10, and can improve the rigidity of the stator core 21, thereby being beneficial to reducing the vibration degree of the stator core 21 when the rotor core 31 rotates, and being beneficial to reducing the noise of the stator core 21 when the rotor core 31 rotates; specifically, the outer diameter of the stator core 21 is D3 mm, and the inner diameter of the housing 10 is D4 mm.
[0051] If D3 is too large or D4 is too small, the difference between the outer diameter of the stator core 21 and the inner diameter of the housing 10 is too large, which will result in too thin a wall thickness between the stator slots 211 and the outer wall of the stator core 21, affecting the rigidity of the stator core 21 and the vibration noise of the stator core 21 when the rotor core 31 rotates. If D3 is too small or D4 is too large, the difference between the outer diameter of the stator core 21 and the inner diameter of the housing 10 is too small, that is, the contact area between the stator core 21 and the housing 10 is too small, which will lead to too small a connection rigidity between the stator core 21 and the housing 10, resulting in a poor elliptical triangular mode of the stator core 21 during vibration, affecting the rigidity of the stator core 21 and the vibration noise of the stator core 21 when the rotor core 31 rotates.
[0052] Therefore, D3 and D4 can be associated, that is, D3 - D4, and D3 - D4 can be limited between 0.02 and 0.08. D3 - D4 can be any one of the point values 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08 or the range value between any two of them, which can improve the connection rigidity between the stator core 21 and the housing 10 and can improve the rigidity of the stator core 21, thus being beneficial to reducing the vibration degree of the stator core 21 when the rotor core 31 rotates and being beneficial to reducing the noise of the stator core 21 when the rotor core 31 rotates.
[0053] As Figure 1 and Figure 3 shown, according to some embodiments of the present invention, the motor 100 can be welded to the housing 10, which can improve the connection rigidity between the stator core 21 and the housing 10 and can improve the rigidity of the stator core 21, thus being beneficial to reducing the vibration degree of the stator core 21 when the rotor core 31 rotates and being beneficial to reducing the noise of the stator core 21 when the rotor core 31 rotates.
[0054] It can be understood that on the basis of the interference fit between the motor 100 and the housing 10, the motor 100 can be welded to the housing 10, which can further improve the connection rigidity between the stator core 21 and the housing 10 and can further improve the rigidity of the stator core 21, thereby preventing the motor 100 from being separated from the housing 10 and ensuring the safe operation of the motor 100.
[0055] As Figure 3 and Figure 5As shown, according to some embodiments of the present utility model, a plurality of magnets 32 may be provided in the rotor core 31. The magnetic pole polarities of two adjacent magnets 32 are opposite, which can ensure the number of poles of the rotor 30. Thus, on the basis of ensuring the performance of the motor 100, the copper loss and iron loss of the motor 100 can be at a relatively average level, and the variable loss and constant loss of the motor 100 can be at a relatively average level, which can improve the working efficiency of the motor 100.
[0056] As Figure 5 shown, the interval angle between two adjacent magnets 32 is θ°. If θ is too large, the number of poles of the rotor 30 is too small, that is, the number of magnets 32 in the rotor core 31 is small, which easily affects the performance of the motor 100. If θ is too small, the number of poles of the rotor 30 is too large, that is, the number of magnets 32 in the rotor core 31 is large, which will reduce the rigidity of the rotor core 31 and it is difficult to ensure the safe operation of the motor 100. Therefore, θ can be limited between 30 and 36. θ can be any one of the point values 30, 31, 32, 33, 34, 35, 36 or the range value between any two of them. On the basis of ensuring the rigidity of the rotor core 31, the performance of the motor 100 can be improved, and the safe operation of the motor 100 can be ensured.
[0057] As Figure 5 shown, according to some embodiments of the present utility model, when θ is equal to 30, the number of poles of the rotor 30 can be 12. When θ is equal to 36, the number of poles of the rotor 30 can be 10. Therefore, P can be limited between 10 and 12. P can be any one of the point values 10, 11, 12. On the basis of ensuring the rigidity of the rotor core 31, the performance of the motor 100 can be improved, and the safe operation of the motor 100 can be ensured.
[0058] Among them, the designer can select the number of poles of the rotor 30 to be 10. Since GCD(Q, P) is the greatest common divisor of the number of stator slots 211 and the number of poles of the rotor 30, GCD(Q, P) can represent the order of the minimum electromagnetic force generated by the motor 100. In order to simplify the electronic control and make the winding more regular, the designer can select the number of stator slots 211 to be 15. Or, the designer can select the number of poles of the rotor 30 to be 12 and select the number of stator slots 211 to be 18, which can reduce the vibration and noise of the motor 100, simplify the electronic control of the motor 100, make the winding more regular, and facilitate manufacturing.
[0059] As Figure 3 and Figure 5 shown, according to some embodiments of the present utility model, the rotor core 31 may be provided with a through-flow channel 311. The through-flow channel 311 may be along the axial direction of the rotor core 31 (such as Figure 2The vertical direction (as shown) penetrates through the rotor core 31, facilitating the pumping out of gas through the through-flow channel 311, ensuring the normal operation of the rotary compressor 1000, and preventing gas from being pumped out through the oil return channel (for example, the channel between the stator core 21 and the housing 10) due to the excessively small outlet channel (through-flow channel 311), thereby ensuring the oil return capacity of the rotary compressor 1000 and improving the reliability of the rotary compressor 1000.
[0060] As Figure 3 and Figure 5 shown, in some examples, in the radial direction of the rotor core 31 (the inner and outer directions as Figure 3 shown), a plurality of fixing holes 312 can be distributed outside the through-flow channel 311 (the outside as Figure 3 shown), which can increase the distance between the fixing connection member and the center of the rotor core 31, facilitating improving the fixing effect on the plurality of rotor laminations, so that the fixing connection member can press the rotor core 31 in the axial direction of the rotor core 31 (the vertical direction as Figure 2 shown), thereby facilitating improving the rigidity of the rotor core 31, facilitating reducing the vibration degree of the rotor core 31 during rotation, and facilitating reducing the noise of the rotor core 31 during rotation.
[0061] As Figure 5 shown, in some examples, in the radial direction of the rotor core 31 (the inner and outer directions as Figure 5 shown), the minimum distance between the through-flow channel 311 and the fixing holes 312 has a value range of D5. If D5 is too large, it will increase the size of the rotor core 31, making it difficult for the fixing connection member to press the rotor core 31, easily reducing the rigidity of the rotor core 31, and easily increasing the vibration noise of the rotor core 31 during rotation. If D5 is too large, when the fixing connection member presses the rotor core 31, it is easy to cause the through-flow channel 311 to deform, making it difficult to ensure the safe operation of the motor 100.
[0062] Therefore, D5 can be limited to between 5 and 12. D5 can be any one of the point values 5, 6, 7, 8, 9, 10, 11, 12 or the range value between any two of them. On the basis of ensuring that the fixing connection member can press the rotor core 31 and ensuring the rigidity of the rotor core 31, the influence of the fixing connection member on the through-flow channel 311 can be reduced, that is, the deformation of the through-flow channel 311 can be prevented, ensuring the safe operation of the motor 100.
[0063] As Figure 3 and Figure 5As shown, according to some embodiments of the present invention, the rotor core 31 has a plurality of magnet slots, and the plurality of magnet slots can be arranged at intervals along the circumferential direction of the rotor core 31. The magnet 32 can be installed in the magnet slot to generate a permanent magnetic field in the rotor 30. The magnet slot can be a straight slot. For example, in a cross-section perpendicular to the axial direction of the rotor core 31 (such as Figure 2 the up and down direction shown), the magnet slot can extend along a direction perpendicular to the radial direction of the rotor core 31 (such as Figure 3 the inner and outer direction shown).
[0064] Among them, the magnets 32 can be distributed in a straight line on the rotor core 31, that is, the number of magnets 32 per pole of the rotor 30 is 1, which can enable the motor 100 to achieve a higher torque under a certain excitation current, and can increase the maximum value of the rotational speed of the motor 100, improving the performance of the motor 100.
[0065] According to some embodiments of the present invention, the magnet slot can be a V-shaped slot. For example, the magnet slot includes a first slot section and a second slot section. In a cross-section perpendicular to the axial direction of the rotor core 31 (such as Figure 2 the up and down direction shown), and along the direction from the rotation center of the rotor core 31 towards the stator core 21 (such as Figure 3 the direction from the inside to the outside shown), the first slot section and the second slot section are away from each other.
[0066] Alternatively, the first slot section and the second slot section of each magnet slot respectively extend along a radial direction inclined to the same radial direction of the rotor core 31, and the angle between the first slot section and the same radial direction is the same as the angle between the second slot section and the same radial direction, that is, the first slot section and the second slot section are symmetrically arranged with respect to the same radial direction as the axis of symmetry.
[0067] Among them, the magnets 32 can be distributed in a V shape on the rotor core 31, that is, the number of magnets 32 per pole of the rotor 30 is 2, and the two magnets 32 in each pole of the magnets 32 have an included angle, which is beneficial to improving the magnetic concentration effect of the rotor 30, making the magnetic flux in the rotor 30 part more concentrated, and is beneficial to improving the output power of the motor 100.
[0068] According to some embodiments of the present invention, the magnet slot can be a U-shaped slot, and the magnets 32 can be distributed in a U shape on the rotor core 31, which can make the distribution of the permanent magnetic field more uniform, improve the stability of the permanent magnetic field, and enable the plurality of magnets 32 to provide a stronger permanent magnetic field in the rotor core 31, which is beneficial to improving the power density of the motor 100.
[0069] According to some embodiments of the present invention, the number of phases of the stator winding 22 is m, and the number of slots per pole per phase of the motor 100 is q, that is, under each magnetic pole, the number of slots occupied by each phase winding is By defining The motor 100 can use fractional slots, which is beneficial for saving energy, improving work efficiency, reducing noise, and the fractional slots can adopt concentrated windings, which is beneficial for improving the regularity of automatic winding, increasing the utilization rate of the space in the stator slot 211, enabling the variable losses and constant losses of the motor 100 to be at a relatively average level, thereby improving the work efficiency of the motor 100 and increasing the power density of the motor 100.
[0070] The refrigeration device according to an embodiment of the present invention includes a rotary compressor 1000. By adopting the above-mentioned rotary compressor 1000, the rigidity of the motor 100 can be improved, which is beneficial for reducing the gap between the electrical frequency and the mechanical frequency of the motor 100, thereby reducing the vibration noise of the rotary compressor 1000 during operation and reducing the vibration noise of the refrigeration device during operation.
[0071] Other configurations and operations of the rotary compressor 1000 according to an embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here. In the description of the present invention, "the first feature" and "the second feature" may include one or more of such features. Among them, the up-down direction, left-right direction, and front-back direction are based on the up-down direction, left-right direction, and front-back direction shown in the figure.
[0072] In the description of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.
[0073] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0074] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. 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 housing, the motor includes a stator and a rotor, the stator is outer-mounted on the rotor, the stator includes a stator core in contact with the housing, the stator core has a plurality of stator slots for accommodating stator windings, the number of the stator slots is Q, the number of poles of the rotor is P, the rotor includes a rotor core, the rotor core includes a plurality of stacked rotor laminations, the plurality of rotor laminations are fixedly connected by a fixing connector penetrating along the stacking direction thereof, The number of the fixed connectors is N, the diameter of the fixing hole of the rotor core for penetrating the fixed connector is D1 mm, the outer diameter of the rotor core is D2 mm, the axial height of the rotor core is H1 mm, the circumferential length of the stator in contact with the housing is L mm, the outer diameter of the stator core is D3 mm, and the rotary compressor satisfies: is the greatest common divisor of the number of the stator slots and the number of poles of the rotor.
2. The rotary compressor according to claim 1, characterized in that: The rotary compressor meets the following requirements:
3. The rotary compressor according to claim 2, characterized in that: The height dimension of the rotor core on the central axis of the rotor is H1 mm, and the rotary compressor satisfies: 25≤H1≤35.
4. The rotary compressor according to claim 1, characterized in that: The motor and the housing are interference fit, the outer diameter of the stator core is D3 mm, the inner diameter of the housing is D4 mm, and the following conditions are satisfied: 0.02≤D3-D4≤0.08; And / or, the motor is welded to the housing.
5. The rotary compressor according to claim 1, characterized in that: The rotor core is provided with a plurality of magnets, the magnetic poles of two adjacent magnets are opposite, and the interval angle between two adjacent magnets is θ°, and the rotary compressor satisfies: 30≤θ≤36.
6. The rotary compressor according to claim 1, characterized in that: The number of poles of the rotor is P, which satisfies: 10≤P≤12.
7. The rotary compressor according to claim 1, characterized in that: The rotor core is provided with a through flow channel penetrating the rotor core in the axial direction.
8. The rotary compressor according to claim 7, characterized in that: In the radial direction of the rotor core, the plurality of fixing holes are distributed on the outer side of the through flow channel.
9. The rotary compressor according to claim 8, characterized in that: In the radial direction of the rotor core, the minimum distance between the through flow channel and the fixing hole is D5, which satisfies: 5≤D5≤12.
10. The rotary compressor according to any one of claims 1 to 9, characterized in that: The number of phases of the stator winding is m, and the number of slots per pole and per phase of the motor is q, satisfying:
11. A refrigeration device, characterized in that: Comprising a rotary compressor according to any one of claims 1-10.