Rotary compressor and refrigeration equipment

Abstract

The utility model discloses a rotary compressor and refrigeration equipment. The rotary compressor comprises a shell, a rotary shaft and a rotary shaft, the motor is arranged in the shell and comprises a stator, a rotor and a crankshaft, the rotor is sleeved with the stator, the crankshaft is connected with the rotor, the rotor comprises a rotor iron core and a permanent magnet arranged on the rotor iron core, the stator comprises a stator iron core, and a plurality of trimming runners are defined between the periphery of the stator iron core and the shell; the stator core is provided with a plurality of stator slots for placing the stator windings; the compression component is arranged in the shell, the compression component comprises at least one compression cavity, the total area of the cross sections of the multiple trimming runners is S1 mm < 2 >, the height size of the stator iron core in the axial direction of the crankshaft is H1 mm, the total volume of the compression cavity is Vmm < 3 >, and the rotary compressor meets the requirement of # imgabs0 #. The reliability of the rotary compressor can be improved by limiting the numerical range of # imgabs 1 #.

Description

Technical Field

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

[0002] When a rotary compressor pumps air, the lubricating oil in the rotary compressor will be pumped out accordingly. However, a trimming flow passage is defined between the trimming edge of the stator of the motor and the housing of the rotary compressor, which allows the lubricating oil to flow back during the operation of the rotary compressor to reduce the loss of lubricating oil. In related technologies, the area of the trimming edge of the stator of the motor changes with the change of the number of stator slots, so the size of the trimming flow passage also changes accordingly, resulting in the change of the resistance of the lubricating oil to flow back, affecting the oil return ability of the rotary compressor, reducing the reliability of the rotary compressor, and there is room for improvement. Summary of the Utility Model

[0003] The utility model aims to solve at least 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 strong oil return ability and high reliability.

[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, a rotor and a crankshaft, the stator being sleeved outside the rotor, the crankshaft being connected to the rotor, the rotor including a rotor core and a permanent magnet disposed on the rotor core, the number of poles of the rotor being P, the stator including a stator core, a plurality of trimming flow passages being defined between the outer periphery of the stator core and the housing, the stator core having a plurality of stator slots for placing stator windings, the number of stator slots being Q; a compression component disposed in the housing, the compression component including at least one compression chamber, wherein the total cross-sectional area of the plurality of trimming flow passages is S1mm 2 ², the height dimension of the stator core in the axial direction of the crankshaft is H1mm, the total volume of the compression chamber is Vmm 3 ³, and 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] According to the rotary compressor of the embodiment of the utility model, by making S1, H1 and V related, that is and by defining The numerical range can ensure the rigidity of the stator core and the connection rigidity between the stator core and the housing based on changing the number of poles of the rotor and the number of stator slots. At the same time, it can improve the oil return ability of the rotary compressor, thereby improving the reliability of the rotary compressor.

[0007] According to some embodiments of the present invention, the rotary compressor satisfies: 6000 ≤ V ≤ 31000.

[0008] According to some embodiments of the present invention, the rotary compressor is a single-cylinder compressor, and the rotary compressor satisfies:

[0009] According to some embodiments of the present invention, the rotary compressor is a double-cylinder compressor, and the rotary compressor satisfies:

[0010] According to some embodiments of the present invention, the outer diameter of the rotor core is D1 mm, the height of the rotor core in the axial direction of the crankshaft is H2 mm, and the rotary compressor satisfies:

[0011] According to some embodiments of the present invention, the rotor core has a plurality of flow holes, the flow holes penetrate the rotor core along the extension direction of the crankshaft, and the total cross-sectional area of the plurality of flow holes is S2 mm 2 , the outer diameter of the rotor core is D1 mm, the inner diameter of the stator core is D2 mm, and the rotary compressor satisfies:

[0012]

[0013] In some examples, the cross-section of at least one of the flow holes is circular; and / or, the cross-section of at least one of the flow holes is waist-shaped; and / or, the cross-section of at least one of the flow holes is trapezoidal.

[0014] According to some embodiments of the present invention, the outer diameter of the rotor core is D1 mm, the inner diameter of the stator core is D2 mm, the outer diameter of the stator core is D3 mm, and the rotary compressor satisfies: 0.8 ≤ D2 - D1 ≤ 1.4,

[0015] In some examples, the rotary compressor satisfies: 80 ≤ D3 ≤ 150.

[0016] According to some embodiments of the present invention, the rotary compressor satisfies: 20 ≤ H1 ≤ 60.

[0017] In some examples, the number of phases of the stator winding is m, and it satisfies:

[0018] The refrigeration equipment according to the second aspect embodiment of the present utility model includes a rotary compressor according to the first aspect embodiment of the present utility model. By adopting the above-mentioned rotary compressor, the oil return ability of the rotary compressor can be improved, thereby the reliability of the rotary compressor can be improved, and the reliability of the refrigeration equipment can be improved.

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above-mentioned and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0021] Figure 1 is a schematic structural diagram of a rotary compressor according to some embodiments of the present utility model;

[0022] Figure 2 is a schematic partial structural diagram of a rotary compressor according to some embodiments of the present utility model;

[0023] Figure 3 is a schematic partial structural diagram of a motor according to some embodiments of the present utility model;

[0024] Figure 4 is a schematic structural diagram of a stator core according to some embodiments of the present utility model;

[0025] Figure 5 is a schematic structural diagram of a rotor according to some embodiments of the present utility model;

[0026] Figure 6 is of a rotary compressor according to some embodiments of the present utility model schematic diagram of curve changes of oil discharge rate and rigidity;

[0027] Figure 7 is of a rotary compressor according to some embodiments of the present utility model schematic diagram of curve changes of energy efficiency and cost.

[0028] Reference Signs:

[0029] Rotary compressor 1000, motor 100, compression component 200, compression chamber 201,

[0030] Shell 10,

[0031] Stator 20, stator core 21, stator slot 211, trimming flow channel 212, stator winding 22,

[0032] The rotor 30, the rotor core 31, the flow hole 311, the permanent magnet 32,

[0033] The crankshaft 40. Specific embodiments

[0034] The embodiments of the present invention 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 invention and should not be construed as a limitation of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" 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 invention can be understood according to specific circumstances.

[0037] Next, refer to Figures 1 - 7 Describe the rotary compressor 1000 according to an embodiment of the present invention.

[0038] As Figures 1 - 7 shown, the rotary compressor 1000 according to an embodiment of the present invention includes: a housing 10, a motor 100, and a compression component 200.

[0039] The motor 100 can be arranged within the housing 10. The motor 100 includes a stator 20, a rotor 30, and a crankshaft 40. The stator 20 can be sleeved on the outer periphery of the rotor 30. The crankshaft 40 can be connected to the rotor 30. The rotor 30 includes a rotor core 31 and permanent magnets 32. The permanent magnets 32 can be arranged within the rotor core 31 to generate a permanent magnetic field within the rotor 30. The stator 20 includes a stator core 21. The stator core 21 has a plurality of stator slots 211 for placing stator windings 22. After the stator windings 22 are energized, the stator windings 22 can generate a rotating magnetic field within the stator 20. The rotating magnetic field of the stator 20 can drive the permanent magnetic field of the rotor 30 to rotate, thereby driving the rotor 30 to rotate relative to the stator 20 to drive the crankshaft 40 to rotate, ensuring the normal operation of the motor 100.

[0040] The compression component 200 can be arranged within the housing 10. The compression component includes at least one compression chamber 201. A piston can be installed within the compression chamber 201. The piston can be connected to the crankshaft 40. The rotation of the crankshaft 40 can drive the piston to move within the compression chamber 201, which is beneficial for realizing the compression of gas and the pumping of gas. At the same time, a part of the lubricating oil within the compression component 200 can be pumped out when the compression component 200 pumps gas. A plurality of trimming channels 212 can be defined between the outer periphery of the stator core 21 and the housing 10, enabling the pumped lubricating oil to flow back to the compression component 200 through the trimming channels 212, reducing the loss of lubricating oil, ensuring the normal operation of the rotary compressor 1000, and facilitating maintenance.

[0041] It can be understood that the compression component can include one compression chamber 201, that is, the rotary compressor 1000 is a single-cylinder compressor, which is beneficial for reducing the cost of the rotary compressor 1000 on the basis of ensuring the performance of the rotary compressor 1000; or, the compression component can include a plurality of compression chambers 201. For example, the compression component can include two compression chambers 201, that is, the rotary compressor 1000 is a double-cylinder compressor, which is beneficial for improving the performance of the rotary compressor 1000.

[0042] Among them, the number of poles of the rotor 30 is P, the number of stator slots 211 is Q, 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, affecting the working stability of the motor 100 and easily generating 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, affecting the working reliability of the motor 100.

[0043] Thus, 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 level of the motor 100, reducing the noise of the motor 100, improving the working stability of the motor 100, and at the same time facilitating the simplification of the electronic control of the motor 100 and improving the reliability of the motor 100.

[0044] The total cross-sectional area of multiple trimming channels 212 is S1 mm 2 , the height dimension of the stator core 21 in the axial direction of the crankshaft 40 is H1 mm, and the total volume of the compression chamber 201 is V mm 3 , that is, the displacement of the rotary compressor 1000 is V mm 3 ; if S1 becomes larger, the contact area between the stator core 21 and the housing 10 becomes smaller, affecting the rigidity of the stator core 21 and the connection rigidity between the stator core 21 and the housing 10. If S1 becomes smaller, the resistance to lubricating oil reflux becomes larger, reducing the oil return capacity of the rotary compressor 1000.

[0045] If H1 becomes larger, the length of the trimming channel 212 becomes longer, thus increasing the resistance to lubricating oil reflux and reducing the oil return capacity of the rotary compressor 1000. If H1 becomes smaller, the contact area between the stator core 21 and the housing 10 becomes smaller, affecting the rigidity of the stator core 21 and the connection rigidity between the stator core 21 and the housing 10; if V becomes larger or smaller, the displacement of the rotary compressor 1000 becomes larger or smaller, affecting the oil return capacity of the rotary compressor 1000.

[0046] Thus, S1, H1, and V can be associated together, that is and can be limited between 3.4 - 27.4, which can be any one of the point values 3.4, 7.4, 11.4, 15.4, 19.4, 23.4, 27.4 or the range value between any two of them. On the basis of ensuring the rigidity of the stator core 21 and on the basis of ensuring the connection rigidity between the stator core 21 and the housing 10, the oil return capacity of the rotary compressor 1000 can be improved, thereby improving the reliability of the rotary compressor 1000.

[0047] According to the rotary compressor 1000 of the embodiment of the present invention, by associating S1, H1, and V, that is and by limiting The numerical range can ensure the rigidity of the stator core 21 and the connection rigidity between the stator core 21 and the housing 10 based on changing the number of poles of the rotor 30 and the number of stator slots 211. At the same time, it can improve the oil return ability of the rotary compressor 1000, thereby improving the reliability of the rotary compressor 1000.

[0048] As Figure 1 and Figure 3 shown, according to some embodiments of the present invention, the volume of the compression chamber 201 is V mm 3 . If V increases, the displacement of the rotary compressor 1000 increases, resulting in an increase in the pumped-out amount of lubricating oil when the compression component 200 pumps air, improving the oil discharge amount of the rotary compressor 1000, making the pumped-out lubricating oil more than the returned lubricating oil, thereby reducing the oil return ability of the rotary compressor 1000. If V decreases, the displacement of the rotary compressor 1000 decreases, resulting in a decrease in the air pumping amount of the compression component 200, reducing the performance of the rotary compressor 1000.

[0049] Therefore, V can be limited between 6000 and 31000. V can be any one of the point values of 6000, 11000, 16000, 21000, 26000, 31000 or the range value between any two of them. Based on ensuring the displacement of the rotary compressor 1000, the oil return ability of the rotary compressor 1000 can be ensured. Thus, based on reducing the loss amount of lubricating oil, the performance of the rotary compressor 1000 can be improved, and the reliability of the rotary compressor 1000 can be improved.

[0050] As Figure 1 and Figure 3 shown, according to some embodiments of the present invention, the numerical ranges corresponding to S1, H1, and V in the rotary compressors 1000 of various embodiments are different. For example, can be limited between 5.7 and 23.7, can be any one of the point values of 5.7, 7.7, 9.7, 11.7, 13.7, 15.7, 17.7, 19.7, 21.7, 23.7 or the range value between any two of them. That is, the rotary compressor 1000 can be a single-cylinder compressor. Based on ensuring the reliability of the rotary compressor 1000, it is beneficial to reduce the implementation cost of the rotary compressor 1000.

[0051] Among them, V can be restricted between 6000 and 15000. V can be any one of the point values of 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000, 16000, 17000 or the range value between any two of them. On the basis of ensuring the reliability of the rotary compressor 1000, the displacement of the rotary compressor 1000 can be reduced to lower the cost.

[0052] Such as Figure 1 and Figure 3 shown, according to some embodiments of the present invention, can be limited between 3.4 and 12.3, can be any one of the point values of 3.4, 4.4, 5.4, 6.4, 7.4, 8.4, 9.4, 10.4, 11.4, 12.3 or the range value between any two of them. That is, the rotary compressor 1000 can be a twin-cylinder compressor. On the basis of ensuring the reliability of the rotary compressor 1000, the performance of the rotary compressor 1000 can be improved to enhance the grade of the product.

[0053] Among them, V can be restricted between 15000 and 31000. V can be any one of the point values of 15000, 16000, 17000, 18000, 19000, 20000, 21000, 22000, 23000, 24000, 25000, 26000, 27000, 28000, 29000, 30000, 31000 or the range value between any two of them. On the basis of ensuring the reliability of the rotary compressor 1000, the displacement of the rotary compressor 1000 can be increased to improve the performance of the rotary compressor 1000 and enhance the grade of the product.

[0054] It can be understood that when the single-cylinder design scheme or the twin-cylinder design scheme is selected for the rotary compressor 100 of the present application, the displacements of the two rotary compressors 100 can both reach 15000 mm 3 , that is, the performances of the rotary compressors 1000 in the two embodiments partially overlap, which can improve the cost performance of the product and facilitate the user's choice.

[0055] Such as Figure 2 shown, according to some embodiments of the present invention, the outer diameter of the rotor core 31 is D1 mm, and the height of the rotor core 31 in the axial direction of the crankshaft 40 is H2 mm. If the volume of the rotor core 31 is If becomes larger, the cost of the rotary compressor 1000 will increase, and it will improve the energy utilization rate of the rotary compressor 1000 and the energy efficiency of the rotary compressor 1000. If If it becomes smaller, the energy utilization rate of the rotary compressor 1000 will be reduced, and the energy efficiency of the rotary compressor 1000 will be decreased.

[0056] If V becomes larger, the displacement of the rotary compressor 1000 increases, resulting in an increase in the cost of the rotary compressor 1000, and it will also reduce the energy utilization rate of the rotary compressor 1000 and decrease the energy efficiency of the rotary compressor 1000. If V becomes smaller, the displacement of the rotary compressor 1000 decreases, which will improve the energy utilization rate of the rotary compressor 1000 and increase the energy efficiency of the rotary compressor 1000.

[0057] Therefore, D1, H2, and V can be associated together, that is And it can be Limited between 1.5 and 4.1, It can be any one of the point values of 1.5, 2.0, 2.5, 3.0, 3.5, 4.1 or the range value between any two of them. On the basis of reducing the cost of the rotary compressor 1000, the energy utilization rate of the rotary compressor 1000 can be improved, and the energy efficiency of the rotary compressor 1000 can be increased.

[0058] Such as Figures 2 - 5 As shown, according to some embodiments of the present invention, the rotor core 31 has a plurality of flow holes 311. The flow holes 311 can penetrate through the rotor core 31 along the extension direction of the crankshaft 40 (such as Figure 1 The up and down direction shown), which is convenient for gas and lubricating oil to be pumped out through the flow holes 311. And there is a gap between the rotor core 31 and the stator core 21, which is convenient for gas and lubricating oil to be pumped out through this gap, and it can prevent the lubricating oil from being pumped out through the trimming flow channel 212 due to the too small oil discharge channel (flow holes 311 and the above-mentioned gap), thereby being beneficial to improving the oil return ability of the rotary compressor 1000 and increasing the reliability of the rotary compressor 1000.

[0059] The total cross-sectional area of the plurality of flow holes 311 is S2mm 2 , the outer diameter of the rotor core 31 is D1mm, the inner diameter of the stator core 21 is D2mm, and the total cross-sectional area of the oil discharge channel If becomes larger or S1 becomes smaller, the oil discharge amount of the rotary compressor 1000 will be increased, making the pumped lubricating oil more than the returned lubricating oil, thereby reducing the oil return ability of the rotary compressor 1000. If becomes smaller or S1 becomes larger, the lubricating oil is easily pumped out through the trimming flow channel 212 to occupy the trimming flow channel 212, thereby reducing the oil return ability of the rotary compressor 1000.

[0060] Therefore, S1, S2, D1, and D2 can be associated together, that is And it can be limited between 0.5 and 2.5, which can be any one of the point values of 0.5, 1.0, 1.5, 2.0, 2.5 or the range value between any two of them. On the basis of ensuring the performance of the rotary compressor 1000, the oil return ability of the rotary compressor 1000 can be improved, thereby improving the reliability of the rotary compressor 1000.

[0061] In some examples, the cross-section of at least one flow hole 311 can be circular, which can reduce the resistance of gas and lubricating oil flow, is beneficial to improving the energy efficiency of the rotary compressor 1000, is beneficial to improving the reliability of the rotary compressor 1000, can make the stress distribution of the flow hole 311 uniform, improve the service life of the rotor 30, and is convenient for processing.

[0062] In some examples, the cross-section of at least one flow hole 311 can be kidney-shaped. On the basis of making full use of the internal space of the rotor 30, the flow area of the flow hole 311 can be increased, the gas and lubricating oil flow capacity can be improved, which is beneficial to improving the energy efficiency of the rotary compressor 1000 and is beneficial to improving the reliability of the rotary compressor 1000.

[0063] In some examples, the cross-section of at least one flow hole 311 can be trapezoidal, which can improve the guiding effect on gas flow and reduce the turbulence and flow loss in the flow hole 311, and is beneficial to improving the energy efficiency of the rotary compressor 1000.

[0064] In some examples, multiple flow holes 311 can all be circular; or, multiple flow holes 311 can all be kidney-shaped; or, multiple flow holes 311 can all be trapezoidal; or, a part of the multiple flow holes 311 can be circular and another part of the multiple flow holes 311 can be kidney-shaped; or, a part of the multiple flow holes 311 can be circular and another part of the multiple flow holes 311 can be trapezoidal; or, a part of the multiple flow holes 311 can be kidney-shaped and another part of the multiple flow holes 311 can be trapezoidal; or, multiple flow holes 311 include circular flow holes, kidney-shaped flow holes and trapezoidal flow holes.

[0065] Such as Figure 4 and Figure 5As shown, according to some embodiments of the present utility model, the outer diameter of the rotor core 31 is D1 mm, and the inner diameter of the stator core 21 is D2 mm. If D1 becomes larger, the volume of the rotor core 31 becomes larger, which will lead to an increase in the cost of the rotary compressor 1000. At the same time, the gap between the rotor core 31 and the stator core 21 becomes smaller, which will lead to a decrease in the oil discharge channel (the above-mentioned gap) of the rotary compressor 1000. The lubricating oil is easily pumped out through the trimming channel 212 to occupy the trimming channel 212, thereby reducing the oil return capacity of the rotary compressor 1000.

[0066] If D1 becomes smaller, the volume of the rotor core 31 becomes smaller, which will reduce the energy utilization rate of the rotary compressor 1000 and reduce the energy efficiency of the rotary compressor 1000. At the same time, the gap between the rotor core 31 and the stator core 21 becomes larger, which will lead to an increase in the oil discharge channel (the above-mentioned gap) of the rotary compressor 1000, and will increase the oil discharge volume of the rotary compressor 1000, making the pumped lubricating oil more than the returned lubricating oil, thereby reducing the oil return capacity of the rotary compressor 1000.

[0067] If D2 becomes larger, the gap between the rotor core 31 and the stator core 21 becomes larger, which will lead to an increase in the oil discharge channel (the above-mentioned gap) of the rotary compressor 1000, and will increase the oil discharge volume of the rotary compressor 1000, making the pumped lubricating oil more than the returned lubricating oil, thereby reducing the oil return capacity of the rotary compressor 1000. If D2 becomes smaller, it will lead to a decrease in the oil discharge channel (the above-mentioned gap) of the rotary compressor 1000, and the lubricating oil is easily pumped out through the trimming channel 212 to occupy the trimming channel 212, thereby reducing the oil return capacity of the rotary compressor 1000.

[0068] Therefore, D1 and D2 can be associated together, that is, D2 - D1, and D2 - D1 can be limited between 0.8 and 1.4. D2 - D1 can be any one of the point values of 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4 or the range value between any two of them. On the basis of reducing the cost of the rotary compressor 1000 and on the basis of improving the energy efficiency of the rotary compressor 1000, the oil return capacity of the rotary compressor 1000 can be improved, and the reliability of the rotary compressor 1000 can be improved.

[0069] The outer diameter of the stator core 21 is D3 mm. The size of the stator 20 of the motor 100 can be associated with the greatest common divisor of the number of stator slots 211 and the number of poles of the rotor 30. For example, the ratio of the outer diameter of the stator core 21 to the inner diameter of the stator core 21 can be multiplied by the greatest common divisor of the number of stator slots 211 and the number of poles of the rotor 30, that is If it is too large or too small, it is easy to reduce the working efficiency of the motor 100 and easy to increase the cost of the motor 100.

[0070] Thus, can be limited between 3 and 3.25, which can be any one of the point values 3, 3.05, 3.10, 3.15, 3.20, 3.25 or the range value between any two of them. Thus, by inputting the pre-determined GCD(Q, P) into the range of the ratio of the outer diameter to the inner diameter of the stator core 21 can be determined, which is beneficial for designers to determine reasonable dimensions for the motor 100, thus facilitating the improvement of the working efficiency of the motor 100 and reducing the cost of the motor 100.

[0071] As Figure 4 shown, in some examples, if D3 is too large, it is easy to increase the volume of the motor 100, affecting the layout form of the motor 100. If D3 is too small, it increases the manufacturing difficulty of the motor 100 and it is difficult to ensure the performance of the motor 100. Thus, D3 can be limited between 80 and 150. D3 can be any one of the point values 80, 90, 100, 110, 120, 130, 140, 150 or the range value between any two of them. On the basis of ensuring the performance of the motor 100, the volume of the motor 100 can be appropriately reduced, which is beneficial for the miniaturization of the motor 100 and facilitates the layout of the motor 100.

[0072] As Figure 1 shown, according to some embodiments of the present invention, if H1 becomes larger, the length of the trimming channel 212 becomes longer, thus increasing the resistance of the lubricating oil to flow back, reducing the oil return capacity of the rotary compressor 1000. If H1 becomes smaller, the contact area between the stator core 21 and the housing 10 becomes smaller, affecting the rigidity of the stator core 21 and the connection rigidity between the stator core 21 and the housing 10.

[0073] Thus, H1 can be limited between 20 and 60. H1 can be any one of the point values 20, 30, 40, 50, 60 or the range value between any two of them. On the basis of ensuring the rigidity of the stator core 21 and on the basis of ensuring the connection rigidity between the stator core 21 and the housing 10, the oil return capacity of the rotary compressor 1000 can be improved and the reliability of the rotary compressor 1000 can be enhanced.

[0074] In some examples, the number of phases of the stator winding 22 is m, and the number of slots occupied by each phase winding under each pole is By limiting 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, can improve the utilization rate of the space in the stator slots 211, and can make the variable losses and constant losses of the motor 100 at a relatively average level, thereby improving the work efficiency of the motor 100 and increasing the power density of the motor 100.

[0075] In some examples, the number of stator slots 211 is Q, the number of poles of the rotor 30 is P, the vibration level of the motor 100 is inversely proportional to the order of the minimum electromagnetic force generated by the motor 100, and GCD(Q, P) can represent the order of the minimum electromagnetic force generated by the motor 100. The designer can limit P between 10 and 12, and the designer can limit Q between 15 and 18, that is, P can be any value among 10, 11, and 12, and Q can be any value among 15, 16, 17, and 18.

[0076] And It can ensure that the motor 100 adopts the form of fractional slot concentrated winding. That is, in order to simplify the electronic control and make the winding of the stator winding 22 more regular, the designer can choose the number of stator slots 211 to be 15 and the number of poles of the rotor 30 to be 10, or the designer can choose the number of stator slots 211 to be 18 and the number of poles of the rotor 30 to be 12. Thus, the vibration and noise of the motor 100 can be reduced, the electronic control of the motor 100 can be simplified, the winding of the winding 12 can be made more regular, and it is convenient for manufacturing.

[0077] According to the refrigeration device of the embodiment of the present invention, it includes a rotary compressor 1000. By adopting the above-mentioned rotary compressor 1000, the oil return ability of the rotary compressor 1000 can be improved, thereby improving the reliability of the rotary compressor 1000 and the reliability of the refrigeration device.

[0078] Figure 6 For the rotary compressor 1000 Schematic diagram of the curve change of the oil discharge rate and rigidity. By observing the appendix Figure 6 It can be seen that as increases, the rigidity of the stator core 21 becomes smaller, the connection rigidity between the stator core 21 and the housing 10 becomes smaller, and at the same time, the oil discharge rate of the rotary compressor 1000 becomes smaller, that is, the oil return ability of the rotary compressor 1000 becomes stronger until equals 27.4. When is greater than 27.4, the oil discharge rate of the rotary compressor 1000 basically remains stable, but the rigidity of the stator core 21 and the connection rigidity between the stator core 21 and the housing 10 decrease rapidly, making it difficult to ensure the safe operation of the rotary compressor 1000.

[0079] As decreases, the rigidity of the stator core 21 increases, and the connection rigidity between the stator core 21 and the housing 10 increases. At the same time, the oil discharge rate of the rotary compressor 1000 increases, that is, the oil return ability of the rotary compressor 1000 becomes worse, until equals 3.4. When is less than 3.4, the rigidity of the stator core 21 and the connection rigidity between the stator core 21 and the housing 10 remain stable, but the oil discharge rate of the rotary compressor 1000 rises rapidly, that is, the oil return ability of the rotary compressor 1000 suddenly weakens, affecting the reliability of the rotary compressor 1000. Therefore, it is necessary to limit between 3.4 and 17.4.

[0080] Figure 7 is a schematic diagram of the curve change of the of the rotary compressor 1000 with energy efficiency and cost. By observing the attached Figure 7 it can be seen that as increases, the cost of the rotary compressor 1000 increases, and at the same time, the energy efficiency of the rotary compressor 1000 improves, until equals 4.1. When is greater than 4.1, the energy efficiency of the rotary compressor 1000 remains stable, but the cost of the rotary compressor 1000 still rises significantly, affecting the cost performance of the rotary compressor 1000.

[0081] As decreases, the cost of the rotary compressor 1000 decreases, and at the same time, the energy efficiency of the rotary compressor 1000 decreases, until equals 1.5. When is less than 1.5, the cost of the rotary compressor 1000 can be reduced to an acceptable range in the market, but the energy efficiency of the rotary compressor 1000 drops rapidly, increasing the user's usage cost. Therefore, it is necessary to limit between 1.5 and 4.1.

[0082] Other configurations and operations of the rotary compressor 1000 according to the embodiments 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.

[0083] In the description of the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include contact between the first and second features not being direct but through additional features therebetween. Moreover, the first feature being "above", "over" 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 level height than the second feature.

[0084] In the description of this specification, the description of reference terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. 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 utility model. In this specification, the schematic expressions 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.

[0085] Although the embodiments of the present utility model 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 utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A rotary compressor, characterized in that, Comprising: A housing; A motor disposed within the housing, the motor including a stator, a rotor, and a crankshaft, the stator being sleeved outside the rotor, the crankshaft being connected to the rotor, the rotor including a rotor core and permanent magnets disposed on the rotor core, the number of poles of the rotor being P, the stator including a stator core, a plurality of trimming channels being defined between the outer periphery of the stator core and the housing, the stator core having a plurality of stator slots for placing stator windings, the number of stator slots being Q; Compression component, the compression component is arranged in the housing, the compression component includes at least one compression chamber, wherein the total cross-sectional area of a plurality of the trimming channels is S1 mm 2 , the height dimension of the stator core in the axial direction of the crankshaft is H1 mm, and the total volume of the compression chamber is V mm 3 , 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.

2. The rotary compressor according to claim 1, characterized in that, The rotary compressor satisfies: 6000 ≤ V ≤ 31000.

3. The rotary compressor according to claim 1, characterized in that, The rotary compressor is a single-cylinder compressor, and the rotary compressor satisfies:

4. The rotary compressor according to claim 1, wherein The rotary compressor is a twin-cylinder compressor, and the rotary compressor satisfies:

5. The rotary compressor according to claim 1, characterized in that, The outer diameter of the rotor core is D1 mm, and the height of the rotor core in the axial direction of the crankshaft is H2 mm. The rotary compressor satisfies:

6. The rotary compressor according to claim 1, wherein The rotor core has a plurality of flow holes which penetrate the rotor core along the extension direction of the crankshaft, and the total cross-sectional area of the plurality of flow holes is S2 mm 2 , the outer diameter of the rotor core is D1 mm, the inner diameter of the stator core is D2 mm, and the rotary compressor satisfies:

7. The rotary compressor according to claim 6, wherein The cross-section of at least one of the flow holes is circular; And / or, the cross-section of at least one of the flow holes is kidney-shaped; And / or, the cross-section of at least one of the flow holes is trapezoidal.

8. The rotary compressor according to claim 1, wherein, The outer diameter of the rotor core is D1 mm, the inner diameter of the stator core is D2 mm, the outer diameter of the stator core is D3 mm, and the rotary compressor satisfies 0.8 ≤ D2 - D1 ≤ 1.

4.

9. The rotary compressor according to claim 8, wherein The rotary compressor satisfies: 80 ≤ D3 ≤ 150.

10. The rotary compressor according to claim 1, wherein, The rotary compressor satisfies: 20 ≤ H1 ≤ 60.

11. The rotary compressor according to any one of claims 1 to 10, characterized in that, The number of phases of the stator winding is m, satisfying:

12. A refrigeration device, characterized in that, Comprising the rotary compressor according to any one of claims 1-11.

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