Rotary compressor and refrigeration equipment

Abstract

The rotary compressor comprises a stator iron core and a rotor iron core located in the stator iron core, a stator groove is formed between every two adjacent tooth parts, a pump body component comprises a crankshaft and an air cylinder, and the air cylinder is provided with an air suction hole which is opened outwards in the radial direction; wherein the notch width of each stator groove is W, the number of the stator grooves is Q, the maximum outer circle contour radius of the stator core is R1, the minimum inner circle contour radius of the stator core is R2, the axial thickness of the stator core is T, the number of magnetic poles of the rotor core is 2P, the maximum radius of the rotor core is R3, and the distance between the center line of the air suction hole and the end, away from the motor, of the shell is H, according to the rotary compressor provided by the embodiment of the utility model, the oil spitting rate of the rotary compressor can be reduced, and the heat exchange efficiency of a refrigerant is improved, so that the energy efficiency of the rotary compressor is improved, the refrigeration effect is ensured, and the use experience of a user is improved.

Description

Technical Field

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

[0002] A rotary compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas and is the heart of a refrigeration system. The rotary compressor can suck in low-temperature and low-pressure refrigerant gas from the suction pipe, and then drive a piston to compress it through the operation of the motor, and discharge the high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle and achieve the purpose of compressing gas. However, when the rotary compressor exhausts, due to a certain degree of mutual solubility between the refrigerant and the lubricating oil, the lubricating oil will be discharged from the rotary compressor together with the refrigerant, resulting in a reduction in the lubricating oil of the rotary compressor. At the same time, too much lubricating oil mixed in the refrigerant will lead to a decrease in the heat exchange efficiency, reduce the energy efficiency, affect the refrigeration effect, and thus affect the user experience, 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. For this purpose, the utility model provides a rotary compressor, which can reduce the oil spitting rate of the rotary compressor, improve the heat exchange efficiency of the refrigerant, and further improve the energy efficiency of the rotary compressor, improve the refrigeration effect, and improve the user experience.

[0004] The rotary compressor according to an embodiment of the utility model includes: a housing; a motor and a pump body component, both located in the housing. The motor includes a stator core and a rotor core located inside the stator core. The stator core includes an annular yoke portion and a plurality of tooth portions provided on the inner peripheral wall of the yoke portion. A stator slot is formed between two adjacent tooth portions. The outer peripheral wall of the rotor core is provided with a plurality of circumferentially distributed magnet slots, and magnets are installed in the magnet slots. The pump body component includes a crankshaft and a cylinder. One end of the crankshaft is connected to the rotor core, and the other end of the crankshaft passes through the cylinder and is connected to an eccentric member inside the cylinder. The cylinder is provided with a suction hole that opens radially outward; wherein, the width of the opening of the stator slot is W, the number of stator slots is Q, the maximum outer circle contour radius of the stator core is R1, the minimum inner circle contour radius of the stator core is R2, the axial thickness of the stator core is T, the number of magnetic poles of the rotor core is 2P, the maximum radius of the rotor core is R3, and the distance between the center line of the suction hole and the end of the housing far from the motor is H, and it satisfies: 2P≥10,

[0005] The rotary compressor according to an embodiment of the present utility model, by setting the notch width W of the stator slot, the number Q of the stator slots, the maximum outer circular contour radius R1 of the stator core, the minimum inner circular contour radius R2 of the stator core, the axial thickness T of the stator core, the number of magnetic poles 2P of the rotor core, the maximum radius R3 of the rotor core, and the distance H between the center line of the suction hole and the end of the housing far from the motor to satisfy: 2P≥10, Furthermore, the oil spitting rate of the rotary compressor can be reduced, the heat exchange efficiency of the refrigerant can be improved, so as to improve the energy efficiency of the rotary compressor, ensure the refrigeration effect, improve the user experience, have better use effect, and wider application range.

[0006] The rotary compressor according to some embodiments of the present utility model satisfies:

[0007] For the rotary compressor according to some embodiments of the present utility model, the housing is provided with an exhaust hole, the aperture of the exhaust hole is D, and it satisfies:

[0008] For the rotary compressor according to some embodiments of the present utility model, it satisfies: 5mm≤D≤17mm.

[0009] The rotary compressor according to some embodiments of the present utility model satisfies:

[0010] For the rotary compressor according to some embodiments of the present utility model, a plurality of groove portions are provided on the outer peripheral wall of the stator core, and the plurality of groove portions are spaced apart along the circumferential direction of the stator core.

[0011] For the rotary compressor according to some embodiments of the present utility model, the number of the groove portions is N, and it satisfies:

[0012] The rotary compressor according to some embodiments of the present utility model satisfies:

[0013] For the rotary compressor according to some embodiments of the present utility model, the maximum depth of the groove portion in the radial direction of the stator core is L1, the maximum thickness of the yoke portion in the radial direction is L2, and it satisfies:

[0014] The rotary compressor according to some embodiments of the present utility model satisfies:

[0015] The rotary compressor according to some embodiments of the present utility model satisfies: 0<L1≤15mm;

[0016] And / or, it satisfies: 0 < L2 ≤ 15 mm.

[0017] For the rotary compressor according to some embodiments of the present utility model, it satisfies: 40 mm ≤ R1 ≤ 70 mm;

[0018] And / or, it satisfies: 20 mm ≤ R3 ≤ 40 mm.

[0019] For the rotary compressor according to some embodiments of the present utility model, it satisfies: 10 mm ≤ H ≤ 80 mm.

[0020] For the rotary compressor according to some embodiments of the present utility model, it satisfies: 15 ≤ Q ≤ 18.

[0021] For the rotary compressor according to some embodiments of the present utility model, it satisfies: 20 mm ≤ T ≤ 100 mm;

[0022] And / or, it satisfies: 1.6 mm ≤ W ≤ 12 mm.

[0023] The rotary compressor according to some embodiments of the present utility model further includes a liquid receiver, the liquid receiver is located outside the housing, and an intake pipe is connected between the liquid receiver and the intake hole.

[0024] For the rotary compressor according to some embodiments of the present utility model, the stator core includes a plurality of stator laminations, and the plurality of stator laminations are stacked and distributed in sequence along the axial direction;

[0025] And / or, the rotor core includes a plurality of rotor laminations, and the plurality of rotor laminations are stacked and distributed in sequence along the axial direction.

[0026] The present utility model also proposes a refrigeration device.

[0027] The refrigeration device according to the embodiments of the present utility model includes the rotary compressor described in any one of the above.

[0028] The refrigeration device and the above-mentioned rotary compressor have the same advantages as compared with the prior art, which will not be elaborated here.

[0029] 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. Description of the Drawings

[0030] 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, where:

[0031] Figure 1 is a schematic structural diagram of a rotary compressor according to an embodiment of the present utility model;

[0032] Figure 2 is a partial cross-sectional view of a rotary compressor according to an embodiment of the present invention;

[0033] Figure 3 is a curve schematic diagram of a rotary compressor according to an embodiment of the present invention Figure 1 ;

[0034] Figure 4 is a curve schematic diagram of a rotary compressor according to an embodiment of the present invention Figure 2 ;

[0035] Figure 5 is a curve schematic diagram of a rotary compressor according to an embodiment of the present invention Figure 3 .

[0036] Reference numerals:

[0037] Rotary compressor 100,

[0038] Housing 1, exhaust hole 11, motor 2, stator core 3, yoke portion 31, groove portion 311, tooth portion 32, stator slot 33, stator punching 34, rotor core 4, magnet slot 41, magnet 42, rotor punching 43, pump body component 5, crankshaft 51, cylinder 52, suction hole 521, eccentric member 53, bearing member 54, accumulator 6, suction pipe 61. Detailed implementation manners

[0039] 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.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by 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. are 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 with "first", "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 "plurality" is two or more.

[0041] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. 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.

[0042] Next, refer to Figures 1 - 5 to describe the rotary compressor 100 according to an embodiment of the present utility model, which can reduce the oil spitting rate of the rotary compressor 100, improve the heat exchange efficiency of the refrigerant, and further improve the energy efficiency of the rotary compressor 100, enhance the refrigeration effect, so as to improve the user experience.

[0043] As Figures 1 - 5 shown, the rotary compressor 100 according to an embodiment of the present utility model includes: a housing 1, a motor 2, and a pump body component 5.

[0044] Both the motor 2 and the pump body component 5 are located inside the housing 1. The motor 2 includes a stator core 3 and a rotor core 4 located inside the stator core 3. The stator core 3 includes an annular yoke portion 31 and a plurality of tooth portions 32 provided on the inner peripheral wall of the yoke portion 31. A stator slot 33 is formed between two adjacent tooth portions 32. A plurality of magnet slots 41 distributed circumferentially are provided on the outer peripheral wall of the rotor core 4, and magnets 42 are installed in the magnet slots 41. The pump body component 5 includes a crankshaft 51 and a cylinder 52. One end of the crankshaft 51 is connected to the rotor core 4, and the other end of the crankshaft 51 passes through the cylinder 52 and is connected to an eccentric member 53 inside the cylinder 52. The cylinder 52 is provided with a suction hole 521 that opens radially outward; wherein, the width of the opening of the stator slot 33 is W, the number of stator slots 33 is Q, the maximum outer circular contour radius of the stator core 3 is R1, the minimum inner circular contour radius of the stator core 3 is R2, the axial thickness of the stator core 3 is T, the number of magnetic poles of the rotor core 4 is 2P, the maximum radius of the rotor core 4 is R3, and the distance between the center line of the suction hole 521 and the end of the housing 1 far from the motor 2 is H, and it satisfies: 2P≥10,

[0045] Among them, the rotary compressor 100 is a driven fluid machine that raises low-pressure gas to high-pressure gas and is the heart of the refrigeration system. The rotary compressor 100 can suck in low-temperature and low-pressure refrigerant gas from the suction pipe 61, and after being compressed by the piston driven by the operation of the motor 2, discharge high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle.

[0046] Specifically, a rotary compressor 100 is provided with a housing 1. The housing 1 is arranged on the outermost side of the rotary compressor 100. The housing 1 can support and protect the internal parts of the rotary compressor 100, and an installation cavity can be formed inside the housing 1. The components of the rotary compressor 100 can be installed in the installation cavity, so that gas can flow into the housing 1 and be compressed by the components in the installation cavity to ensure the operation reliability of the rotary compressor 100. And a motor 2 is arranged inside the rotary compressor 100. The motor 2 is commonly known as a "motor", which refers to an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction. The motor 2 can be divided into motors and generators, etc. And the motor 2 is provided with a stator core 3 and a rotor core 4. The stator core 3 is arranged as a hollow structure, and the rotor core 4 can be located inside the stator core 3. The stator core 3 and the rotor core 4 can work together to realize the operation of the motor 2.

[0047] Furthermore, the stator core 3 is provided with a yoke portion 31 and tooth portions 32. The stator core 3 is arranged as a cylinder, and the stator core 3 is provided with a yoke portion 31 and tooth portions 32. The yoke portion 31 is arranged as an annular structure, and the tooth portions 32 are provided in plurality. The plurality of tooth portions 32 are spaced apart and connected to the inner peripheral wall of the yoke portion 31, and the plurality of tooth portions 32 all extend towards the center of the yoke portion 31. The spacing between adjacent tooth portions 32 is equal, and the adjacent tooth portions 32 and the inner peripheral wall of the yoke portion 31 jointly define stator slots 33, that is, the stator slots 33 are also provided in plurality. The plurality of stator slots 33 all open towards the center of the yoke portion 31. The rotor core 4 is installed inside the stator core 3, that is, the plurality of stator slots 33 all open towards the rotor core 4. The outer peripheral wall of the rotor core 4 is provided with a plurality of magnet slots 41, and the plurality of magnet slots 41 are circumferentially spaced apart. Magnets 42 can be installed in the magnet slots 41.

[0048] At the same time, the rotary compressor 100 is also provided with a pump body component 5. The pump body component 5 and the motor 2 are both arranged inside the housing 1. And the pump body component 5 is provided with a crankshaft 51, a cylinder 52 and bearing parts 54. The cylinder 52 can be provided as one or two, etc. The bearing parts 54 can also be provided as two. The two bearing parts 54 are respectively located on the upper and lower sides of the cylinder 52. One end of the crankshaft 51 can sequentially pass through the cylinder 52 and the bearing parts 54 and be connected to an eccentric part 53 inside the cylinder 52. The other end of the crankshaft 51 is connected to the rotor core 4. When the crankshaft 51 rotates, it can drive the rotor core 4 to rotate, so that the magnets 42 in the magnet slots 41 also rotate accordingly. And the magnets 42 can generate a magnetic field when rotating, so that the stator core 3 and the stator core 3 can interact with each other, thereby generating a torque to drive the operation of the motor 2. And the cylinder 52 is also provided with a suction hole 521. The suction hole 521 opens radially outwards. External gas can enter the cylinder 52 through the suction hole 521 and then be compressed.

[0049] Among them, a stator slot 33 is defined between two adjacent tooth portions 32 of the stator core 3, and the minimum distance between two adjacent tooth portions 32 is set to W, that is, the slot width of the stator slot 33 is set to W. The tooth portions 32 are provided in plurality, and the plurality of tooth portions 32 define a plurality of stator slots 33. The number of stator slots 33 is set to Q, and the maximum outer circular contour radius of the stator core 3 is set to R1, the minimum inner circular contour radius of the stator core 3 is set to R2, and the axial thickness of the stator core 3 is set to T. The maximum radius of the rotor core 4 is set to R3. The rotor core 4 is provided with a plurality of magnet slots 41 in the circumferential direction, and magnets 42 are installed in the magnet slots 41, so that the rotor core 4 forms a plurality of alternately distributed magnetic poles. The number of magnetic poles of the rotor core 4 can be set to 2P, and the distance between the center line of the air suction hole 521 and the end of the housing 1 far from the motor 2 is H, and it satisfies: 2P≥10, The above units are all in mm, 2P≥10, that is, the number of magnetic poles of the rotor core 4 of the rotary compressor 100 can be set to 10, 12 or 14, etc. Furthermore, the number of magnetic poles of the rotor core 4 of the rotary compressor 100 can be limited to be relatively large. Setting a relatively large number of magnetic poles can increase the starting torque of the motor 2, ensure the smoothness of the motor 2 during low-speed operation, reduce the noise generated during the low-speed operation of the motor 2, and improve the user's comfort.

[0050] Furthermore, That is, The value of can be set to 0.5, 3 or 4.2, etc. H refers to the distance between the center line of the air suction hole 521 and the end of the housing 1 far from the motor 2. There is oil and other substances in the housing 1. When the rotary compressor 100 operates, it can lubricate the crankshaft 51, etc., to ensure the running reliability of the crankshaft 51, etc. The oil can be stored between the center line of the air suction hole 521 and the end of the housing 1 far from the motor 2. When H is larger, the content of the stored oil is more. When the rotary compressor 100 operates, the oil at the bottom of the housing 1 can move upward axially through the lifting force, and then flow into the upper cavity of the housing 1. The oil in the upper cavity can flow back to the lower part of the housing 1 through the gap between the stator core 3 and the housing 1. When the axial thickness T of the stator core 3 is set larger, the resistance of the oil flowing back to the lower part of the housing 1 is larger, that is, the oil return speed is slower. Therefore, H, R1 and T are set to satisfy: It can ensure the lubrication effect of the components in the housing 1, ensure the oil return of the oil, reduce the discharge amount of the oil with the gas, and thus reduce the oil spitting rate of the rotary compressor 100.

[0051] And That is, The value can be set to 3, 6, 9, etc. The minimum inner circle contour radius of the stator core 3 is R2, and the maximum radius of the rotor core 4 is R3. The gap between the stator core 3 and the rotor core 4 is R2 - R3. After the oil flows to the upper cavity under the lift force, part of it can flow back to the lower part of the housing 1 through the gap between the stator core 3 and the rotor core 4. When R2 - R3 is larger, the gap between the stator core 3 and the rotor core 4 is larger, which is beneficial to the oil return. And the number of stator slots 33 is Q, the number of pole pairs of the rotor core 4 is P, and the slot opening width of the stator slot 33 is set to W. When W × Q × P is larger, that is, the number of slots is more, the slot opening width of the stator slot 33 is larger, and the number of pole pairs is more, it is also convenient for oil return.

[0052] As Figure 4 shown is the curve schematic diagram between the oil discharge rate and and it can be known from the curve schematic diagram that when the value of is less than or equal to 9 and greater than or equal to 3, the corresponding oil discharge rate is lower, that is, setting W, Q, P, R2, and R3 to satisfy: the oil amount in the upper cavity can be reduced, and then the oil discharge rate of the rotary compressor 100 can be reduced, the heat exchange efficiency of the refrigerant can be improved, so as to improve the energy efficiency of the rotary compressor 100, ensure the refrigeration effect, and improve the user experience.

[0053] For the rotary compressor 100 according to the embodiment of the present invention, by setting the slot opening width W of the stator slot 33, the number Q of the stator slots 33, the maximum outer circle contour radius R1 of the stator core 3, the minimum inner circle contour radius R2 of the stator core 3, the axial thickness T of the stator core 3, the number of poles 2P of the rotor core 4, the maximum radius R3 of the rotor core 4, and the distance H between the center line of the suction hole 521 and the end of the housing 1 far from the motor 2 to satisfy: 2P ≥ 10, furthermore, the oil discharge rate of the rotary compressor 100 can be reduced, the heat exchange efficiency of the refrigerant can be improved, so as to improve the energy efficiency of the rotary compressor 100, ensure the refrigeration effect, and improve the user experience, with better use effect and wider application range.

[0054] In some embodiments, it satisfies:

[0055] Specifically, the maximum outer circle contour radius of the stator core 3 is set to R1, the axial thickness of the stator core 3 is set to T, and the distance between the center line of the suction hole 521 and the end of the housing 1 far from the motor 2 is H, and it satisfies: That is The value of can be set to 0.93, 1.5, 3.02, etc. The notch width of the stator slot 33 is set to W, the number of stator slots 33 is set to Q, the number of magnetic poles of the rotor core 4 can be set to 2P, the minimum inner circle contour radius of the stator core 3 is R2, and the maximum radius of the rotor core 4 is R3, and they satisfy: That is The value of can be set to 3.5, 6, or 7.

[0056] Furthermore, as Figure 3 shown is the schematic curve diagram between and the oil spitting rate. And from the schematic curve diagram, it can be seen that when the value of is less than or equal to 3.02 and greater than or equal to 0.93, the corresponding oil spitting rate is lower. That is, set H, R1, and T to satisfy: It can ensure the lubrication effect of the components in the housing 1, and can ensure the oil return, further reducing the amount of oil discharged with the gas, and thus can reduce the oil spitting rate of the rotary compressor 100.

[0057] At the same time, as Figure 4 shown is the schematic curve diagram between and the oil spitting rate. And from the schematic curve diagram, it can be seen that when the value of is less than or equal to 7 and greater than or equal to 3.5, the corresponding oil spitting rate is lower. That is, set W, Q, P, R2, and R3 to satisfy: It can further reduce the amount of oil in the upper cavity, and thus can further reduce the oil spitting rate of the rotary compressor 100, improve the heat exchange efficiency of the refrigerant, so as to improve the energy efficiency of the rotary compressor 100, ensure the refrigeration effect, and improve the user experience.

[0058] In some embodiments, the housing 1 is provided with an exhaust hole 11, the aperture of the exhaust hole 11 is D, and it satisfies:

[0059] Specifically, the rotary compressor 100 is further provided with an exhaust hole 11. The exhaust hole 11 is arranged on the housing 1. One end of the exhaust hole 11 is communicated with the housing 1, and the other end is communicated with the outside. And the exhaust hole 11 is arranged on the side of the housing 1 away from the pump body component 5, that is, the exhaust hole 11 is communicated with the upper cavity of the housing 1, and the aperture of the exhaust hole 11 is set to D, with the unit of mm. The maximum outer circle contour radius of the stator core 3 is set to R1, with the unit of mm. And the aperture D of the exhaust hole 11 and the maximum outer circle contour radius R1 of the stator core 3 are set to satisfy: That is The value of can be set to 0.072, 0.2, 0.378, etc.

[0060] Further, R1 is the maximum outer circle contour radius of the stator core 3, and D is the aperture diameter of the exhaust hole 11. After the rotary compressor 100 compresses the refrigerant into a gas, the refrigerant can be discharged from the rotary compressor 100 through the exhaust hole 11, and there is also some oil mixed with the refrigerant and discharged through the exhaust hole 11. When R1 is larger, that is, when the size of the stator core 3 is larger, the power of the rotary compressor 100 is larger, and thus the aperture diameter of the exhaust hole 11 needs to be set larger to ensure the reliable operation of the rotary compressor 100. And when R1 is set to be smaller, the size of the stator core 3 is smaller. At this time, the power of the rotary compressor 100 is smaller, the aperture diameter of the exhaust hole 11 can be reduced, and thus the amount of oil discharged through the exhaust hole 11 can be reduced, and further the oil discharge rate of the rotary compressor 100 can be reduced, and the heat exchange efficiency of the refrigerant can be improved.

[0061] In some embodiments, it satisfies: 5mm ≤ D ≤ 17mm.

[0062] Specifically, as Figure 1 shown, an exhaust hole 11 is provided above the housing 1, the aperture diameter of the exhaust hole 11 is set as D, and the aperture diameter D of the exhaust hole 11 is set to satisfy: 5mm ≤ D ≤ 17mm, that is, the aperture diameter D of the exhaust hole 11 can be set to 5mm, 11mm or 17mm, etc. After the rotary compressor 100 compresses the refrigerant into a gas, the refrigerant can be discharged from the rotary compressor 100 through the exhaust hole 11, and there is also some oil mixed with the refrigerant and discharged through the exhaust hole 11. When the rotary compressor 100 is operating, the greater the power of the rotary compressor 100, the larger the aperture diameter of the corresponding exhaust hole 11 needs to be set to ensure the reliable operation of the rotary compressor 100. And when the power of the rotary compressor 100 is small, the aperture diameter of the exhaust hole 11 can be reduced, and thus the amount of oil discharged through the exhaust hole 11 can be reduced. Further, the aperture diameter D of the exhaust hole 11 is set to satisfy: 5mm ≤ D ≤ 17mm, so that the rotary compressor 100 can reduce the oil discharge rate of the rotary compressor 100 while ensuring the reliable operation, improve the heat exchange efficiency of the refrigerant, ensure the refrigeration effect, and improve the user experience.

[0063] In some embodiments, it satisfies:

[0064] Specifically, an exhaust hole 11 is provided above the housing 1, the aperture diameter of the exhaust hole 11 is set as D, the maximum outer circle contour radius of the stator core 3 is set as R1, and it satisfies: That is The value of can be set to 0.049, 0.1 or 0.17, etc., and as Figure 5 shown is the curve schematic diagram between and the oil discharge rate, and from the curve schematic diagram, it can be seen that when When the value is less than or equal to 0.17 and greater than or equal to 0.049, the corresponding oil discharge rate is relatively low. That is, D and R1 are set to satisfy: It can further reduce the oil discharge rate of the rotary compressor 100 while ensuring the operation reliability, improve the heat exchange efficiency of the refrigerant, ensure the refrigeration effect, and improve the user experience.

[0065] In some embodiments, a plurality of groove portions 311 are provided on the outer peripheral wall of the stator core 3, and the plurality of groove portions 311 are spaced apart along the circumferential direction of the stator core 3.

[0066] Specifically, as Figure 1 shown, the motor 2 is disposed in the housing 1, and the motor 2 is provided with a stator core 3 and a rotor core 4 disposed in the stator core 3. The stator core 3 is provided with an annular yoke portion 31, and as Figure 2 shown, a groove portion 311 is provided on the outer peripheral wall of the yoke portion 31. The groove portion 311 is provided in plurality, and the plurality of groove portions 311 are spaced apart on the outer peripheral wall of the yoke portion 31. The groove portion 311 extends along the axial direction. After the stator core 3 is installed in the housing 1, the groove portion 311 can define a flow channel with the inner peripheral wall of the housing 1. The groove portion 311 is provided in plurality, that is, the flow channel is also provided in plurality.

[0067] Further, when the rotary compressor 100 operates, the oil liquid at the bottom of the housing 1 can move upward along the axial direction by the lift force, and then flow into the upper cavity of the housing 1. Moreover, a plurality of groove portions 311 are provided on the outer peripheral wall of the stator core 3, so that a plurality of flow channels are formed between the stator core 3 and the housing 1. The oil liquid in the upper cavity can respectively flow back to the lower part of the housing 1 through the plurality of flow channels, thereby reducing the amount of oil liquid discharged from the upper cavity through the exhaust hole 11, reducing the oil discharge rate of the rotary compressor 100, improving the heat exchange efficiency of the refrigerant, ensuring the refrigeration effect, and improving the user experience.

[0068] In some embodiments, the number of the groove portions 311 is N, and satisfies:

[0069] Specifically, as Figure 2 shown, a plurality of groove portions 311 are provided on the outer peripheral wall of the stator core 3, and the oil liquid in the upper cavity can respectively flow back to the lower part of the housing 1 through the plurality of groove portions 311, thereby reducing the amount of oil liquid discharged from the upper cavity through the exhaust hole 11. The number of the groove portions 311 is set to N, and the number of the stator slots 33 is set to Q. The number N of the groove portions 311 and the number Q of the stator slots 33 can be set to satisfy: That is The value can be set to 0.1, 0.5, 1, etc., so that the number of the groove portions 311 is set to be less than or equal to the number of the stator slots 33, that is, the number of the groove portions 311 can be set to be equal to the number of the stator slots 33 or less than the number of the stator slots 33. Setting the groove portions 311 can reduce the amount of oil in the upper cavity discharged through the exhaust holes 11. When the groove portions 311 are arranged on the outer peripheral wall of the stator core 3, they can be staggeredly distributed in the radial direction with the stator slots 33, thereby ensuring the efficiency of the motor 2, that is, setting the number N of the groove portions 311 and the number Q of the stator slots 33 to satisfy: It is possible to ensure the efficiency of the motor 2 while ensuring the oil discharge rate of the rotary compressor 100.

[0070] In some embodiments, it satisfies:

[0071] Specifically, a plurality of groove portions 311 are arranged on the outer peripheral wall of the stator core 3, and the number of the groove portions 311 is set to N, the number of the stator slots 33 is set to Q, and it satisfies: That is The value can be set to 0.5, 0.6, 0.8, etc. Setting the groove portions 311 can reduce the amount of oil in the upper cavity discharged through the exhaust holes 11. When the groove portions 311 are arranged on the outer peripheral wall of the stator core 3, they can be staggeredly distributed in the radial direction with the stator slots 33, thereby ensuring the efficiency of the motor 2, that is, setting the number N of the groove portions 311 and the number Q of the stator slots 33 to satisfy: It is possible to further ensure the efficiency of the motor 2 while ensuring the oil discharge rate of the rotary compressor 100.

[0072] In some embodiments, the maximum depth of the groove portion 311 in the radial direction of the stator core 3 is L1, the maximum thickness of the yoke portion 31 in the radial direction is L2, and it satisfies:

[0073] Specifically, the groove portion 311 is arranged on the outer peripheral wall of the stator core 3, and the groove portion 311 can be set as an arc-shaped groove body, etc. The groove portion 311 is recessed inward in the radial direction on the outer peripheral wall of the stator core 3, and the maximum depth of the groove portion 311 in the radial direction of the stator core 3 is set to L1. The yoke portion 31 is arranged on the outermost side of the stator core 3. The groove portion 311 is formed on the outer peripheral wall of the yoke portion 31. The yoke portion 31 is set as an annular structure, and the maximum thickness of the yoke portion 31 in the radial direction is set to L2. The maximum depth L1 of the groove portion 311 in the radial direction of the stator core 3 and the maximum thickness L2 of the yoke portion 31 in the radial direction are set to satisfy: That is The value can be set to 0.1, 0.5, 1, etc.

[0074] Furthermore, That is, the maximum depth of the groove portion 311 in the radial direction of the stator core 3 is set to be less than or equal to the maximum thickness of the yoke portion 31 in the radial direction. That is, the maximum depth of the groove portion 311 in the radial direction of the stator core 3 can be set to be equal to the maximum thickness of the yoke portion 31 in the radial direction, or can be set to be less than the maximum thickness of the yoke portion 31 in the radial direction. The greater the depth of the groove portion 311 in the radial direction of the stator core 3, the higher the flow rate of the oil fluid through the groove portion 311. However, if the depth of the groove portion 311 in the radial direction of the stator core 3 is too large, it will affect the efficiency of the motor 2 and the structural strength of the stator core 3. Therefore, L1 and L2 are set to satisfy: While ensuring the efficiency of the motor 2 and the strength of the stator core 3, it is also possible to reduce the amount of oil fluid discharged from the exhaust hole 11, so as to reduce the oil spillage rate of the rotary compressor 100, improve the heat exchange efficiency of the refrigerant, ensure the refrigeration effect, and improve the user experience.

[0075] In some embodiments, it satisfies:

[0076] Specifically, the groove portion 311 is provided on the outer peripheral wall of the stator core 3, and the maximum depth of the groove portion 311 in the radial direction of the stator core 3 is set to L1, and the maximum thickness of the yoke portion 31 in the radial direction is set to L2, and it satisfies: That is The value of can be set to 0.4, 0.6 or 0.8, etc. The greater the depth of the groove portion 311 in the radial direction of the stator core 3, the higher the flow rate of the oil fluid through the groove portion 311. However, if the depth of the groove portion 311 in the radial direction of the stator core 3 is too large, it will affect the efficiency of the motor 2 and the structural strength of the stator core 3. Therefore, L1 and L2 are set to satisfy: While ensuring the efficiency of the motor 2 and the strength of the stator core 3, it is also possible to further reduce the amount of oil fluid discharged from the exhaust hole 11, so as to reduce the oil spillage rate of the rotary compressor 100, improve the heat exchange efficiency of the refrigerant, ensure the refrigeration effect, and improve the user experience.

[0077] In some embodiments, it satisfies: 0 < L1 ≤ 15 mm; and / or, it satisfies: 0 < L2 ≤ 15 mm.

[0078] Specifically, the groove portion 311 is provided on the outer peripheral wall of the stator core 3, and the maximum depth of the groove portion 311 in the radial direction of the stator core 3 is set to L1. The maximum depth L1 of the groove portion 311 in the radial direction of the stator core 3 can be set to satisfy: 0 < L1 ≤ 15 mm. That is, the maximum depth L1 of the groove portion 311 in the radial direction of the stator core 3 can be set to 1 mm, 8 mm, 15 mm, etc. The greater the depth of the groove portion 311 in the radial direction of the stator core 3, the higher the flow rate of the oil from the groove portion 311. However, if the depth of the groove portion 311 in the radial direction of the stator core 3 is too large, it will affect the efficiency of the motor 2 and the structural strength of the stator core 3. Therefore, L1 is set to satisfy: 0 < L1 ≤ 15 mm, which can reduce the amount of oil discharged from the exhaust hole 11 while ensuring the efficiency of the motor 2 and the strength of the stator core 3, thereby reducing the oil spitting rate of the rotary compressor 100, improving the heat exchange efficiency of the refrigerant, ensuring the refrigeration effect, and improving the user experience.

[0079] Furthermore, the maximum thickness of the yoke portion 31 in the radial direction is set to L2, and the maximum thickness L2 of the yoke portion 31 in the radial direction can be set to satisfy: 0 < L2 ≤ 15 mm. That is, the maximum thickness L2 of the yoke portion 31 in the radial direction can be set to 1 mm, 8 mm, 15 mm, etc. The greater the thickness of the yoke portion 31, the deeper the depth of the corresponding groove portion 311 can be set. However, if the thickness of the yoke portion 31 is too large, it will cause a reduction in the area of the stator slot 33 and affect the operating efficiency of the motor 2. Therefore, L2 is set to satisfy: 0 < L2 ≤ 15 mm, which can ensure the depth of the groove portion 311 while also ensuring the operating efficiency of the motor 2.

[0080] In actual setting, only the maximum depth L1 of the groove portion 311 in the radial direction of the stator core 3 can be set to satisfy: 0 < L1 ≤ 15 mm, or only the maximum thickness L2 of the yoke portion 31 in the radial direction can be set to satisfy: 0 < L2 ≤ 15 mm. Alternatively, the maximum depth L1 of the groove portion 311 in the radial direction of the stator core 3 can be set to satisfy: 0 < L1 ≤ 15 mm, and at the same time, the maximum thickness L2 of the yoke portion 31 in the radial direction can be set to satisfy: 0 < L2 ≤ 15 mm, which improves the setting flexibility.

[0081] In some embodiments, it satisfies: 40 mm ≤ R1 ≤ 70 mm; and / or, it satisfies: 20 mm ≤ R3 ≤ 40 mm.

[0082] Specifically, such as Figure 1As shown, the maximum outer circular contour radius of the stator core 3 is set as R1, and the maximum outer circular contour radius R1 of the stator core 3 is set to satisfy 40 mm ≤ R1 ≤ 70 mm. That is, the maximum outer circular contour radius R1 of the stator core 3 can be set as 40 mm, 50 mm, 70 mm, etc. The maximum radius of the rotor core 4 is set as R3, and the maximum radius R3 of the rotor core 4 is set to satisfy 20 mm ≤ R3 ≤ 40 mm. That is, the maximum radius R3 of the rotor core 4 can be set as 20 mm, 30 mm, 50 mm, etc.

[0083] Furthermore, with other dimensions unchanged, the smaller R1 is, the smaller the maximum thickness of the yoke 31 is, which leads to a reduction in the reliability of the motor 2. And the larger R1 is, the larger the maximum thickness of the yoke 31 is, which further increases the rigidity of the motor 2, and can reduce the noise generated when the motor 2 rotates. However, the larger the thickness of the yoke 31 is, the smaller the area of the stator slot 33 is, which will lead to problems such as a reduction in the efficiency of the motor 2. Setting the maximum outer circular contour radius R1 of the stator core 3 to satisfy 40 mm ≤ R1 ≤ 70 mm can, while ensuring the normal operation of the motor 2, also improve the structural strength of the motor 2, thereby ensuring the operating reliability of the motor 2, extending the service life of the motor 2, reducing the noise generated when the motor 2 operates, and improving the user experience.

[0084] And in actual setting, only the maximum outer circular contour radius R1 of the stator core 3 can be set to satisfy 40 mm ≤ R1 ≤ 70 mm, or only the maximum radius R3 of the rotor core 4 can be set to satisfy 20 mm ≤ R3 ≤ 40 mm. It is also possible to set the maximum outer circular contour radius R1 of the stator core 3 to satisfy 40 mm ≤ R1 ≤ 70 mm, and at the same time, set the maximum radius R3 of the rotor core 4 to satisfy 20 mm ≤ R3 ≤ 40 mm, improving the setting flexibility.

[0085] In some embodiments, 10 mm ≤ H ≤ 80 mm is satisfied.

[0086] Specifically, the pump body component 5 is provided with a cylinder 52, and the cylinder 52 is formed with an air suction hole 521. The distance between the center line of the air suction hole 521 and the end of the housing 1 far from the motor 2 is set as H, and the distance H between the center line of the air suction hole 521 and the end of the housing 1 far from the motor 2 is set to satisfy 10 mm ≤ H ≤ 80 mm. That is, the distance H between the center line of the air suction hole 521 and the end of the housing 1 far from the motor 2 can be set as 10 mm, 45 mm, 80 mm, etc. There is oil in the housing 1, which can lubricate the crankshaft 51, etc. during the operation of the rotary compressor 100 to ensure the operating reliability of the crankshaft 51, etc. This oil can be stored between the center line of the air suction hole 521 and the end of the housing 1 far from the motor 2.

[0087] Further, the larger the value of H, the more oil is stored, which can ensure the lubrication effect on the internal parts of the rotary compressor 100 and guarantee the operation reliability of the rotary compressor 100. When the rotary compressor 100 is operating, the oil at the bottom of the housing 1 can move upward axially through the lifting force and then flow into the upper cavity of the housing 1. When H is too large, there is too much oil in the upper cavity, which affects the oil discharge rate of the rotary compressor 100. Therefore, the distance H between the center line of the suction hole 521 and the end of the housing 1 far from the motor 2 is set to satisfy: 10 mm ≤ H ≤ 80 mm, which can ensure the lubrication effect on the internal parts of the rotary compressor 100 while guaranteeing the oil discharge rate and improving the operation efficiency of the rotary compressor 100.

[0088] Wherein, when the rotary compressor 100 is a twin-cylinder rotary compressor 100, that is, when the number of cylinders 52 is set to two, H is the distance between the center line of the suction hole 521 of the lower cylinder 52 and the end of the housing 1 far from the motor 2.

[0089] In some embodiments, it satisfies: 15 ≤ Q ≤ 18.

[0090] Specifically, adjacent two tooth portions 32 of the stator core 3 define a stator slot 33. The tooth portions 32 are provided in multiple numbers, and the multiple tooth portions 32 define multiple stator slots 33. The number of stator slots 33 is set to Q, and the number Q of the stator slots 33 is set to satisfy: 15 ≤ Q ≤ 18, that is, the number Q of the stator slots 33 can be set to 15, 16, or 18, etc. In this embodiment, the number Q of the stator slots 33 is set to 15. When the rotary compressor 100 is operating, the oil in the housing 1 can flow into the upper cavity of the housing 1, and part of the oil can flow back to the lower part of the housing 1 through the gap in the stator slot 33.

[0091] Furthermore, setting the number of stator slots 33 relatively large enables the oil to flow back through multiple stator slots 33 respectively, which can improve the oil return speed and reduce the amount of oil discharged through the exhaust hole 11. However, setting the number of stator slots 33 too large will increase the manufacturing difficulty and cost. Therefore, the number Q of the stator slots 33 is set to satisfy: 15 ≤ Q ≤ 18, which can reduce the oil discharge rate of the rotary compressor 100 while ensuring the manufacturing difficulty and cost, improve the heat exchange efficiency of the refrigerant, guarantee the refrigeration effect, and improve the user experience.

[0092] In some embodiments, it satisfies: 20 mm ≤ T ≤ 100 mm, and / or, it satisfies: 1.6 mm ≤ W ≤ 12 mm.

[0093] Specifically, the axial thickness of the stator core 3 is set to T, and it satisfies: 20 mm ≤ T ≤ 100 mm. That is, the axial thickness T of the stator core 3 can be set to 20 mm, 60 mm, 100 mm, etc. The slot width of the stator slot 33 is set to W, and it satisfies: 1.6 mm ≤ W ≤ 12 mm. The slot width W of the stator slot 33 can be set to 1.6 mm, 6 mm, 12 mm, etc. When the rotary compressor 100 operates, the oil at the bottom of the housing 1 can move upward axially through the lift force, and then flow into the upper cavity of the housing 1. Moreover, the oil in the upper cavity can flow back below the housing 1 through the gap between the stator core 3 and the housing 1. The axial thickness T of the stator core 3 and the slot width W of the stator slot 33 can affect the oil return speed. Setting the axial thickness T of the stator core 3 to satisfy: 20 mm ≤ T ≤ 100 mm and setting the slot width W of the stator slot 33 to satisfy: 1.6 mm ≤ W ≤ 12 mm can increase the oil return speed, and further reduce the amount of oil in the upper cavity, so as to reduce the oil spitting rate, improve the heat exchange efficiency of the refrigerant, ensure the refrigeration effect, and improve the user experience.

[0094] And in actual setting, only the axial thickness T of the stator core 3 can be set to satisfy: 20 mm ≤ T ≤ 100 mm, or only the slot width W of the stator slot 33 can be set to satisfy: 1.6 mm ≤ W ≤ 12 mm. It is also possible to set the axial thickness T of the stator core 3 to satisfy: 20 mm ≤ T ≤ 100 mm, and at the same time, set the slot width W of the stator slot 33 to satisfy: 1.6 mm ≤ W ≤ 12 mm, which improves the setting flexibility.

[0095] In some embodiments, the rotary compressor 100 further includes a liquid receiver 6. The liquid receiver 6 is located outside the housing 1, and an intake pipe 61 is connected between the liquid receiver 6 and the intake hole 521.

[0096] Specifically, as Figure 1 shown, the rotary compressor 100 is provided with a liquid receiver 6. The liquid receiver 6 can be set as a sealed cylindrical structure. The liquid receiver 6 is located outside the housing 1 of the rotary compressor 100, and the liquid receiver 6 is provided with an intake pipe 61. The intake pipe 61 is set as a bendable tubular structure. One end of it is communicated with the liquid receiver 6, and the other end is communicated with the intake hole 521 of the cylinder 52. Thus, the liquid receiver 6 can be connected to the cylinder 52 through the intake pipe 61. Connecting the liquid receiver 6 and the intake hole 521 through the intake pipe 61 can improve the flexibility of the installation position of the liquid receiver 6 and facilitate the installation of the rotary compressor 100.

[0097] Furthermore, the liquid reservoir 6 can function as a storage, gas-liquid separation, filtration, silencing, and refrigerant buffering component. It is a protective component that prevents liquid refrigerant from flowing into the rotary compressor 100 and causing liquid hammer. During the operation of the air-conditioning system, the liquid refrigerant will remain in the liquid reservoir 6, while the gaseous refrigerant can enter the cylinder 52 of the rotary compressor 100 through the suction pipe 61, thereby preventing problems such as liquid hammer caused by the rotary compressor 100 sucking in liquid refrigerant and ensuring the reliable operation of the rotary compressor 100. Additionally, structures such as a filter screen can be provided in the suction pipe 61 to prevent impurities from entering the rotary compressor 100 and also ensure the reliable operation of the rotary compressor 100.

[0098] Meanwhile, when the rotary compressor 100 is operating, a certain amount of oil will be discharged with the gaseous refrigerant inside it, and this part of the oil can enter the liquid reservoir 6 through the pipeline and circulate back into the rotary compressor 100 under the suction force of the rotary compressor 100, thereby playing a lubricating and protective role for the rotary compressor 100 and ensuring the reliable operation of the rotary compressor 100.

[0099] In some embodiments, the stator core 3 includes a plurality of stator laminations 34, and the plurality of stator laminations 34 are stacked and distributed in sequence along the axial direction; and / or, the rotor core 4 includes a plurality of rotor laminations 43, and the plurality of rotor laminations 43 are stacked and distributed in sequence along the axial direction.

[0100] Specifically, the motor 2 is provided with a rotor and a stator. The stator is provided with a stator core 3 and a stator winding. The stator core 3 can be used to enhance electromagnetic induction and concentrate the electromagnetic field. The stator winding is arranged in the stator slots 33. The rotor is provided with a rotor core 4, and the rotor core 4 is arranged inside the stator core 3. When the motor 2 is operating, the stator will generate a magnetic field through the current to interact with the rotating rotor magnetic field to generate torque, thereby driving the motor 2 to operate. During the operation of the motor 2, the stator remains stationary while the rotor participates in the rotation of the motor 2.

[0101] Furthermore, the stator core 3 is provided with stator laminations 34, and the stator laminations 34 are provided in a plurality. The plurality of stator laminations 34 have the same structure, and the plurality of stator laminations 34 can be stacked and distributed in sequence along the axial direction to form a complete stator core 3. The stator laminations 34 can be set as silicon steel sheets, which are thin steel plates with a low carbon content, can increase the resistivity, reduce the eddy current loss caused by the thickness direction, and ensure the reliable operation of the stator core 3. Moreover, the rotor core 4 is provided with rotor laminations 43, and the rotor laminations 43 are provided in a plurality. The plurality of rotor laminations 43 have the same structure, and the plurality of rotor laminations 43 can be stacked and distributed in sequence along the axial direction to form a complete rotor core 4. The rotor laminations 43 can also be set as silicon steel sheets, thereby ensuring the reliable operation of the rotor core 4.

[0102] Moreover, during actual installation, the stator core 3 can be set to be composed of a plurality of stator laminations 34 stacked axially in sequence, or the rotor core 4 can be set to be composed of a plurality of rotor laminations 43 stacked axially in sequence. Alternatively, the stator core 3 can be set to be composed of a plurality of stator laminations 34 stacked axially in sequence, and at the same time, the rotor core 4 can be set to be composed of a plurality of rotor laminations 43 stacked axially in sequence, improving the flexibility of installation.

[0103] Among them, in this embodiment, the optimal value of the distance H between the center line of the suction hole 521 and the end of the housing 1 far from the motor 2 is 21 mm, the optimal value of the axial thickness T of the stator core 3 is 25 mm, the optimal value of the slot opening width W of the stator slot 33 is 2.8 mm, the number Q of the stator slots 33 is 15, the optimal value of the maximum outer circle contour radius R1 of the stator core 3 is 50.575 mm, the optimal value of the minimum inner circle contour radius R2 of the stator core 3 is 30 mm, and the optimal value of the maximum radius R3 of the rotor core 4 is 30.5 mm. The optimal value of is 0.92. The optimal value of is 4.2.

[0104] The present utility model also proposes a refrigeration device.

[0105] The refrigeration device according to the embodiment of the present utility model includes the rotary compressor 100 of any one of the above.

[0106] For the refrigeration device according to the embodiment of the present utility model, by setting the slot opening width W of the stator slot 33, the number Q of the stator slots 33, the maximum outer circle contour radius R1 of the stator core 3, the minimum inner circle contour radius R2 of the stator core 3, the axial thickness T of the stator core 3, the number of magnetic poles 2P of the rotor core 4, the maximum radius R3 of the rotor core 4, and the distance H between the center line of the suction hole 521 and the end of the housing 1 far from the motor 2 to satisfy: 2P≥10. Furthermore, the oil discharge rate of the rotary compressor 100 can be reduced, the heat exchange efficiency of the refrigerant can be improved, so as to improve the energy efficiency of the rotary compressor 100, ensure the refrigeration effect, improve the user experience, and have better use effects and a wider application range.

[0107] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean 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.

[0108] 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 purposes 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: include: case; The motor and the pump body components are both located in the housing, the motor includes a stator core and a rotor core located in the stator core, the stator core includes an annular yoke and a plurality of teeth arranged on the inner peripheral wall of the yoke, a stator slot is formed between two adjacent teeth, the outer peripheral wall of the rotor core is provided with a plurality of magnetic steel slots distributed along the circumferential direction, magnetic steel is installed in the magnetic steel slot, the pump body component includes a crankshaft and a cylinder, one end of the crankshaft is connected to the rotor core, the other end of the crankshaft is passed through the cylinder and connected to the eccentric piece in the cylinder, and the cylinder is provided with an air intake hole opened radially outward; The slot width of the stator slot is W, the number of the stator slots is Q, the maximum outer contour radius of the stator core is R1, the minimum inner contour radius of the stator core is R2, the axial thickness of the stator core is T, the number of magnetic poles of the rotor core is 2P, the maximum radius of the rotor core is R3, the distance between the center line of the air intake hole and the end of the housing farthest from the motor is H, and the following conditions are satisfied: 2P≥10, 2. The rotary compressor according to claim 1, characterized in that: satisfy:

3. The rotary compressor according to claim 1, characterized in that: The housing is provided with an exhaust hole, the diameter of the exhaust hole is D, and satisfies:

4. The rotary compressor according to claim 3, characterized in that: Satisfies: 5mm≤D≤17mm.

5. The rotary compressor according to claim 3, characterized in that: satisfy:

6. The rotary compressor according to claim 1, characterized in that: The outer peripheral wall of the stator core is provided with a plurality of grooves, and the plurality of grooves are distributed at intervals along the circumferential direction of the stator core.

7. The rotary compressor according to claim 6, characterized in that: The number of the grooves is N, and they satisfy:

8. The rotary compressor according to claim 7, characterized in that: satisfy:

9. The rotary compressor according to claim 6, characterized in that: The maximum depth of the groove portion in the radial direction of the stator core is L1, the maximum thickness of the yoke portion in the radial direction is L2, and the following conditions are satisfied:

10. The rotary compressor according to claim 9, characterized in that: satisfy:

11. The rotary compressor according to claim 9, characterized in that: Satisfy: 0<L1≤15mm; And / or, satisfying: 0<L2≤15mm.

12. The rotary compressor according to claim 1, characterized in that Meet: 40mm≤R1≤70mm; And / or, satisfying: 20mm≤R3≤40mm.

13. The rotary compressor according to claim 1, characterized in that Meets: 10mm≤H≤80mm.

14. The rotary compressor according to claim 1, characterized in that Satisfies: 15≤Q≤18.

15. The rotary compressor according to claim 1, characterized in that Meet: 20mm≤T≤100mm; And / or, satisfying: 1.6mm≤W≤12mm.

16. The rotary compressor according to claim 1, characterized in that It also includes a liquid reservoir, which is located outside the shell, and an air suction pipe is connected between the liquid reservoir and the air suction hole.

17. The rotary compressor according to claim 1, characterized in that The stator core comprises a plurality of stator punching sheets, and the plurality of stator punching sheets are stacked and distributed in sequence along the axial direction; And / or, the rotor core includes a plurality of rotor punchings, and the plurality of rotor punchings are stacked and distributed in sequence along the axial direction.

18. A refrigeration device, characterized in that: A rotary compressor comprising any one of claims 1-17.

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