Rotary compressor and refrigeration apparatus

Abstract

A rotary compressor and a refrigeration apparatus. The rotary compressor comprises: a housing, an electric motor and a pump component, wherein the electric motor comprises a stator core and a rotor core located inside the stator core; the stator core comprises an annular yoke portion and a plurality of tooth portions arranged on the inner peripheral wall of the yoke portion, with a stator slot being formed between every two adjacent tooth portions; the pump component comprises a crankshaft and a cylinder, the cylinder being provided with an air suction hole that opens radially outwards; and the slot opening width of each stator slot is W, the number of stator slots is Q, the maximum outer circular contour radius of the stator core is R1, the minimum inner circular 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 of the housing farther from the electric motor is H, satisfying: 2P≥10, 0.5≤(I)≤4.2, and 3≤(II)≤9.

Description

Rotary compressor and refrigeration device

[0001] Cross-reference to related applications

[0002] The present application is based on Chinese Patent Application No. 202411063149.4, filed on August 2, 2024, in the name of Anhui Meizhi Precision Manufacturing Co., Ltd., entitled "Rotary Compressor and Refrigeration Device", 202421873634.3, filed on August 2, 2024, in the name of Anhui Meizhi Precision Manufacturing Co., Ltd., entitled "Rotary Compressor and Refrigeration Device", and claims priority to the above-mentioned Chinese Patent Applications, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of industry, in particular to a rotary compressor and a refrigeration device having the same. BACKGROUND

[0004] The rotary compressor is a driven fluid machine that lifts low-pressure gas to high-pressure gas, and is the heart of the refrigeration system. The rotary compressor can suck low-temperature and low-pressure refrigerant gas from the suction pipe, and then discharge high-temperature and high-pressure refrigerant gas to the exhaust pipe after compression by the motor operation and the piston, so as to provide power to the refrigeration cycle and achieve the purpose of compressing gas. However, when the rotary compressor exhausts, the lubricating oil will be discharged from the rotary compressor together with the refrigerant due to the mutual solubility of the refrigerant and the lubricating oil, which reduces the lubricating oil of the rotary compressor. Meanwhile, too much lubricating oil mixed with the refrigerant will reduce the heat exchange efficiency, reduce the energy efficiency, and affect the refrigeration effect, thereby affecting the user experience, and there is room for improvement. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a rotary compressor, which can reduce the oil discharge rate of the rotary compressor, improve the heat exchange efficiency of the refrigerant, and thus improve the energy efficiency of the rotary compressor, improve the refrigeration effect, and improve the user experience.

[0006] According to the rotary compressor, the slot opening width W of the stator slot, the number Q of the stator slots, the maximum outer profile radius R1 of the stator core, the minimum inner profile radius R2 of the stator core, the axial thickness T of the stator core, the number 2P of the magnetic poles 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 shell far from the motor satisfy 2P≥10, 0.5≤ ≤4.2, 3≤ ≤9.

[0007] According to the rotary compressor, the slot opening width W of the stator slot, the number Q of the stator slots, the maximum outer profile radius R1 of the stator core, the minimum inner profile radius R2 of the stator core, the axial thickness T of the stator core, the number 2P of the magnetic poles 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 shell far from the motor satisfy 2P≥10, 0.5≤ ≤4.2, 3≤ ≤9, thereby reducing the oil discharge rate of the rotary compressor, improving the heat exchange efficiency of the refrigerant, improving the energy efficiency of the rotary compressor, ensuring the refrigeration effect, improving the user experience, having better use effect, having wider application range.

[0008] According to the rotary compressor, 0.93≤ ≤3.02, 3.5≤ ≤7.

[0009] According to the rotary compressor, the shell is provided with an exhaust hole, the hole diameter of the exhaust hole is D, and 0.072≤ ≤0.378.

[0010] According to the rotary compressor, 5mm≤D≤17mm.

[0011] According to the rotary compressor, 0.049≤ ≤ 0.17.

[0012] According to some embodiments of the present application, the outer peripheral wall of the stator core is provided with a plurality of groove portions, and the plurality of groove portions are distributed at intervals along the circumferential direction of the stator core.

[0013] According to some embodiments of the present application, the number of groove portions is N, and 0 < N < 1. ≤ 1.

[0014] According to some embodiments of the present application, 0.4 < N < 1. ≤ 0.8.

[0015] According to some embodiments of the present application, 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 0 < L1 / L2 < 1. ≤ 1.

[0016] According to some embodiments of the present application, 0.3 < L1 / L2 < 1. ≤ 0.8.

[0017] According to some embodiments of the present application, 0 < L1 ≤ 15 mm.

[0018] And / or, 0 < L2 ≤ 15 mm.

[0019] According to some embodiments of the present application, 40 mm ≤ R1 ≤ 70 mm.

[0020] And / or, 20 mm ≤ R3 ≤ 40 mm.

[0021] According to some embodiments of the present application, 10 mm ≤ H ≤ 80 mm.

[0022] According to some embodiments of the present application, 15 ≤ Q ≤ 18.

[0023] According to some embodiments of the present application, 20 mm ≤ T ≤ 100 mm.

[0024] And / or, 1.6 mm ≤ W ≤ 12 mm.

[0025] According to some embodiments of the present application, the rotary compressor further comprises a liquid accumulator located outside the shell, and a suction pipe is connected between the liquid accumulator and the suction hole.

[0026] According to some embodiments of the present application, the stator core comprises a plurality of stator laminations, which are sequentially stacked along the axial direction.

[0027] And / or, the rotor core comprises a plurality of rotor laminations, which are sequentially stacked along the axial direction.

[0028] The present application also provides a refrigeration device.

[0029] According to some embodiments of the present application, the refrigeration device comprises the rotary compressor as described above.

[0030] The refrigeration device and the rotary compressor as described above have the same advantages as the prior art, which will not be repeated here.

[0031] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings.

[0033] Fig. 1 is a schematic structural view of a rotary compressor according to some embodiments of the present application;

[0034] Fig. 2 is a partial sectional view of a rotary compressor according to some embodiments of the present application;

[0035] Fig. 3 is a first schematic curve view of a rotary compressor according to some embodiments of the present application;

[0036] Fig. 4 is a second schematic curve view of a rotary compressor according to some embodiments of the present application;

[0037] Fig. 5 is a third schematic curve view of a rotary compressor according to some embodiments of the present application.

[0038] Reference Signs:

[0039] Rotary compressor 100,

[0040] Housing 1, exhaust hole 11, motor 2, stator core 3, yoke portion 31, recess portion 311, tooth portion 32, stator slot 33, stator lamination 34, rotor core 4, magnet steel slot 41, magnet steel 42, rotor lamination 43, pump body component 5, crankshaft 51, cylinder 52, suction hole 521, eccentric 53, bearing component 54, liquid accumulator 6, suction pipe 61. Embodiments of the present application

[0041] Embodiments of the present application are described below in detail with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are for the purpose of explanation of the present application, and are not to be understood as limiting the present application.

[0042] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the features defined with "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0043] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] The rotary compressor 100 according to an embodiment of the present application is described below with reference to FIGS. 1-5, which can reduce the oil discharge rate of the rotary compressor 100, improve the heat exchange efficiency of the refrigerant, and thus improve the energy efficiency of the rotary compressor 100, improve the refrigeration effect, and improve the user experience.

[0045] As shown in FIGS. 1-5, the rotary compressor 100 according to an embodiment of the present application includes a housing 1, a motor 2, and a pump body component 5.

[0046] The motor 2 and the pump body part 5 are located in the shell 1, the motor 2 comprises a stator core 3 and a rotor core 4 located in the stator core 3, the stator core 3 comprises a ring-shaped yoke part 31 and a plurality of tooth parts 32 arranged on the inner peripheral wall of the yoke part 31, a stator slot 33 is formed between adjacent two tooth parts 32, and the outer peripheral wall of the rotor core 4 is provided with a plurality of circumferentially distributed magnetic steel grooves 41, a magnetic steel 42 is arranged in the magnetic steel groove 41, the pump body part 5 comprises a crankshaft 51 and a cylinder 52, one end of the crankshaft 51 is connected with the rotor core 4, the other end of the crankshaft 51 penetrates through the cylinder 52 and is connected with an eccentric part 53 in the cylinder 52, and the cylinder 52 is provided with an air suction hole 521 which is open outward in the radial direction; wherein the slot opening width of the stator slot 33 is W, the number of the stator slots 33 is Q, the maximum outer circle contour radius of the stator core 3 is R1, the minimum inner circle 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 air suction hole 521 and the end of the shell 1 far from the motor 2 is H, and the following conditions are met: 2P≥10, 0.5≤ ≤4.2, and 3≤ ≤9.

[0047] The rotary compressor 100 is a driven fluid machine for lifting low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. The rotary compressor 100 can suck in low-temperature and low-pressure refrigerant gas from the suction pipe 61, compress the refrigerant gas by driving the piston through the operation of the motor 2, and then discharge high-temperature and high-pressure refrigerant gas to the discharge pipe, so as to provide power to the refrigeration cycle.

[0048] Specifically, the rotary compressor 100 is provided with a shell 1 arranged at the outermost side of the rotary compressor 100. The shell 1 can support and protect the internal parts of the rotary compressor 100, and an installation cavity can be formed in the shell 1. The parts of the rotary compressor 100 can be installed in the installation cavity, so that the gas can flow into the shell 1 to be compressed by the parts in the installation cavity, thereby ensuring the operation reliability of the rotary compressor 100. The rotary compressor 100 is provided with a motor 2, which is commonly known as a "motor". The motor 2 is an electromagnetic device for converting or transmitting electric energy according to the electromagnetic induction law. The motor 2 can be divided into a motor and a generator, and the motor 2 is provided with a stator core 3 and a rotor core 4. The stator core 3 is arranged in a hollow structure, and the rotor core 4 can be located in the stator core 3. The stator core 3 and the rotor core 4 can work cooperatively to realize the operation of the motor 2.

[0049] In addition, the stator core 3 is provided with a yoke portion 31 and a plurality of tooth portions 32, the stator core 3 is provided in a cylindrical shape, the yoke portion 31 is provided in a ring structure, and the plurality of tooth portions 32 are spaced apart from the inner circumferential wall of the yoke portion 31 and extend toward the center of the yoke portion 31, the spacing between adjacent tooth portions 32 is equal, and the inner circumferential wall of the yoke portion 31 and the adjacent tooth portions 32 jointly define a stator slot 33, that is, a plurality of stator slots 33 are formed, the plurality of stator slots 33 are open toward the center of the yoke portion 31, the rotor core 4 is installed in the stator core 3, that is, the plurality of stator slots 33 are open toward the rotor core 4, and the outer circumferential wall of the rotor core 4 is provided with a plurality of magnetic steel grooves 41, the plurality of magnetic steel grooves 41 are distributed in a circumferential direction, and a magnetic steel 42 can be installed in the magnetic steel groove 41.

[0050] Meanwhile, the rotary compressor 100 is further provided with a pump body component 5, the pump body component 5 and the motor 2 are arranged in the shell 1, the pump body component 5 is provided with a crankshaft 51, a cylinder 52, and a bearing component 54, the cylinder 52 can be provided as one or two, the bearing component 54 can also be provided as two, the two bearing components 54 are respectively located on the upper and lower sides of the cylinder 52, one end of the crankshaft 51 is sequentially arranged in the cylinder 52 and the bearing component 54 and connected with an eccentric component 53 in the cylinder 52, the other end of the crankshaft 51 is connected with the rotor core 4, when the crankshaft 51 rotates, the rotor core 4 is driven to rotate, so that the magnetic steel 42 in the magnetic steel groove 41 also rotates, and the magnetic steel 42 can generate a magnetic field when rotating, thereby enabling the stator core 3 and the stator core 3 to interact with each other to generate torque, drive the motor 2 to operate, and the cylinder 52 is further provided with a suction hole 521, the suction hole 521 is open outward in a radial direction, and external gas can enter the cylinder 52 through the suction hole 521 to be compressed.

[0051] In the rotary compressor 100, the minimum distance between the adjacent two tooth portions 32 of the stator core 3 is W, that is, the slot width of the stator slot 33 is W, the number of tooth portions 32 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 maximum radius of the rotor core 4 is R3, the rotor core 4 is provided with a plurality of magnetic steel grooves 41 in a circumferential direction, the magnetic steel 42 is installed in the magnetic steel groove 41, the rotor core 4 is formed with a plurality of magnetic poles which are alternately distributed, the number of magnetic poles of the rotor core 4 is 2P, the distance between the center line of the suction hole 521 and the end of the shell 1 far from the motor 2 is H, and the following conditions are satisfied: 2P≥10, 0.5≤H / R3≤4.2, and 3≤T / R3. ​≤9, all the above units are mm, 2P≥10, that is, the number of magnetic poles of the rotor core 4 can be set to 10, 12, or 14, and so on, thereby the number of magnetic poles of the rotor core 4 of the rotary compressor 100 can be limited to be larger, and the larger number of magnetic poles can improve the starting torque of the motor 2, and can also ensure the smoothness of the motor 2 when running at a low speed, reduce the noise generated by the motor 2 when running at a low speed, and improve the user's comfort.

[0052] In addition, 0.5≤ ≤4.2, that is, The value of H can be set to 0.5, 3, or 4.2, and so on, H refers to the distance between the center line of the suction hole 521 and the end of the shell 1 far from the motor 2, and the shell 1 is provided with oil and the like, and when the rotary compressor 100 is running, the crankshaft 51 and the like can be lubricated to ensure the operation reliability of the crankshaft 51 and the like, the oil can be stored between the center line of the suction hole 521 and the end of the shell 1 far from the motor 2, when H is larger, the content of the stored oil is more, and when the rotary compressor 100 is running, the oil at the bottom of the shell 1 can move upward along the axial direction by the lifting force, and then flow into the upper cavity of the shell 1, and the oil in the upper cavity can flow back to the lower part of the shell 1 through the gap between the stator core 3 and the shell 1, when the axial thickness T of the stator core 3 is set to be larger, the resistance of the oil flowing back to the lower part of the shell 1 is larger, that is, the oil return speed is slower, and then H, R1, and T are set to satisfy: 0.5≤ ≤4.2, which can ensure the lubrication effect of the parts in the shell 1, and can ensure the oil return, reduce the discharge amount of the oil with the gas, and then the oil discharge rate of the rotary compressor 100 can be reduced.

[0053] And 3≤ ≤9, that is, The value of R1 can be set to 3, 6, or 9, and so on, the minimum inner circle contour radius of the stator core 3 is R2, the maximum radius of the rotor core 4 is R3, R2-R3 is the gap size between the stator core 3 and the rotor core 4, and after part of the oil flows to the upper cavity under the action of the lifting force, it can flow back to the lower part of the shell 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 magnetic pole pairs of the rotor core 4 is P, and the slot opening width of the stator slot 33 is W, when is larger, that is, the number of slots is larger, the slot opening width of the stator slot 33 is larger, and the number of magnetic pole pairs is larger, which is also beneficial to the oil return.

[0054] As shown in FIG. 4, it is a curve diagram between the oil discharge rate and , and as can be seen from the curve diagram, when When the values ​​are less than or equal to 9 or greater than or equal to 3, the corresponding oil extraction rate is relatively low. That is, W, Q, P, R2, and R3 are set to satisfy: 3 ≤ A value of ≤9 can reduce the amount of oil in the upper chamber, thereby reducing the oil discharge rate of the rotary compressor 100, improving the heat exchange efficiency of the refrigerant, thus improving the energy efficiency of the rotary compressor 100, ensuring the cooling effect, and enhancing the user experience.

[0055] According to the rotary compressor 100 of this application embodiment, the following parameters are set to satisfy: the slot width W of the stator slot 33, the number Q of the stator slots 33, the maximum outer radius R1 of the stator core 3, the minimum inner 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 furthest from the motor 2: 2P ≥ 10, 0.5 ≤ ≤4.2, 3≤ ≤9, which can reduce the oil discharge rate of the rotary compressor 100, improve the heat exchange efficiency of the refrigerant, improve the energy efficiency of the rotary compressor 100, ensure the cooling effect, improve the user experience, and make it more effective and applicable to a wider range of applications.

[0056] In some embodiments, the following condition is satisfied: 0.93 ≤ ≤3.02, 3.5≤ ≤7.

[0057] Specifically, the maximum outer 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 centerline of the suction hole 521 and the end of the housing 1 furthest from the motor 2 is H, satisfying: 0.93 ≤ ≤3.02, that is The value can be set to 0.93, 1.5, or 3.02, etc. The slot width of stator slot 33 is set to W, the number of stator slots 33 is set to Q, the number of magnetic poles of rotor core 4 can be set to 2P, the minimum inner circle radius of stator core 3 is R2, the maximum radius of rotor core 4 is R3, and it satisfies: 3.5 ≤ ≤7, that is The value can be set to 3.5, 6, or 7.

[0058] Additionally, as shown in Figure 3, The graph shows the relationship between the oil yield and the oil release rate. As can be seen from the graph, when... When the values ​​are less than or equal to 3.02 and greater than or equal to 0.93, the corresponding oil extraction rate is relatively low. That is, H, R1, and T are set to satisfy: 0.93 ≤ ≤3.02, which can ensure the lubrication effect on the components inside the housing 1 and ensure the return of oil, further reduce the amount of oil discharged with the gas, and thus reduce the oil discharge rate of the rotary compressor 100.

[0059] Meanwhile, as shown in Figure 4 The graph shows the relationship between the oil yield and the oil release rate. As can be seen from the graph, when... When the values ​​are less than or equal to 7 and greater than or equal to 3.5, the corresponding oil discharge rate is relatively low. That is, W, Q, P, R2, and R3 are set to satisfy: 3.5 ≤ ≤7 can further reduce the amount of oil in the upper chamber, thereby further reducing the oil discharge rate of the rotary compressor 100, improving the heat exchange efficiency of the refrigerant, thus improving the energy efficiency of the rotary compressor 100, ensuring the cooling effect, and improving the user experience.

[0060] In some embodiments, the housing 1 is provided with an exhaust port 11, the diameter of which is D, and satisfies: 0.072 ≤ ≤0.378.

[0061] Specifically, the rotary compressor 100 is further provided with an exhaust port 11, which is located in the housing 1. One end of the exhaust port 11 is connected to the housing 1, and the other end is connected to the outside. The exhaust port 11 is located on the side of the housing 1 away from the pump body component 5, that is, the exhaust port 11 is connected to the upper cavity of the housing 1. The diameter of the exhaust port 11 is set to D in mm, and the maximum outer radius of the stator core 3 is set to R1 in mm. The diameter D of the exhaust port 11 and the maximum outer radius R1 of the stator core 3 are set to satisfy: 0.072 ≤ ≤0.378, that is The value can be set to 0.072, 0.2, or 0.378, etc.

[0062] In addition, R1 is the maximum outer radius of the stator core 3, and D is the diameter of the exhaust port 11. After the rotary compressor 100 compresses the refrigerant into gas, the refrigerant can be discharged from the rotary compressor 100 through the exhaust port 11. Some oil is also discharged through the exhaust port 11 after mixing with the refrigerant. When R1 is larger, the size of the stator core 3 is larger, which makes the power of the rotary compressor 100 greater. Consequently, the diameter of the exhaust port 11 needs to be set larger to ensure the reliability of the rotary compressor 100. When R1 is set smaller, the size of the stator core 3 is smaller. At this time, the power of the rotary compressor 100 is smaller, and the diameter of the exhaust port 11 can be reduced, thereby reducing the amount of oil discharged through the exhaust port 11, which in turn reduces the oil discharge rate of the rotary compressor 100 and improves the heat exchange efficiency of the refrigerant.

[0063] In some embodiments, the following condition is satisfied: 5mm ≤ D ≤ 17mm.

[0064] Specifically, as shown in Figure 1, an exhaust port 11 is provided on the upper part of the housing 1. The diameter of the exhaust port 11 is set to D, and the diameter D of the exhaust port 11 is set to satisfy: 5mm≤D≤17mm, that is, the diameter D of the exhaust port 11 can be set to 5mm, 11mm, or 17mm, etc. After the rotary compressor 100 compresses the refrigerant into gas, the refrigerant can be discharged from the rotary compressor 100 through the exhaust port 11. Also, some oil mixed with the refrigerant is discharged through the exhaust port 11. When the rotary compressor 100 is running, the power of the rotary compressor 100... The higher the oil discharge rate, the larger the corresponding diameter of the exhaust port 11 needs to be to ensure the operational reliability of the rotary compressor 100. When the power of the rotary compressor 100 is low, the diameter of the exhaust port 11 can be reduced, thereby reducing the amount of oil discharged through the exhaust port 11. Thus, the diameter D of the exhaust port 11 is set to satisfy: 5mm≤D≤17mm. This allows the rotary compressor 100 to reduce the oil discharge rate while ensuring operational reliability, improving the heat exchange efficiency of the refrigerant, ensuring the cooling effect, and improving the user experience.

[0065] In some embodiments, the following condition is satisfied: 0.049 ≤ ≤0.17.

[0066] Specifically, an exhaust port 11 is provided on the upper part of the housing 1, the diameter of the exhaust port 11 is set to D, the maximum outer diameter radius of the stator core 3 is set to R1, and satisfies: 0.049 ≤ ≤0.17, that is The value can be set to 0.049, 0.1, or 0.17, as shown in Figure 5. The graph shows the relationship between the oil yield and the oil release rate. As can be seen from the graph, when... When the value is less than or equal to 0.17 or greater than or equal to 0.049, the corresponding oil extraction rate is relatively low. That is, D and R1 are set to satisfy: 0.049 ≤ With a value of ≤0.17, the oil discharge rate of the rotary compressor can be reduced by 100% while ensuring operational reliability, thereby improving the heat exchange efficiency of the refrigerant, ensuring the cooling effect, and enhancing the user experience.

[0067] In some embodiments, the outer peripheral wall of the stator core 3 is provided with a plurality of grooves 311, which are spaced apart along the circumference of the stator core 3.

[0068] Specifically, as shown in FIG. 1, the motor 2 is arranged in the shell 1, and the motor 2 is provided with a stator core 3 and a rotor core 4 arranged in the stator core 3. The stator core 3 is provided with an annular yoke portion 31, and as shown in FIG. 2, the outer peripheral wall of the yoke portion 31 is provided with a plurality of groove portions 311. The plurality of groove portions 311 are arranged at intervals on the outer peripheral wall of the yoke portion 31, and the groove portions 311 extend in the axial direction. After the stator core 3 is installed in the shell 1, the groove portions 311 can define flow channels with the inner peripheral wall of the shell 1. The groove portions 311 are arranged in multiple numbers, and the flow channels are also arranged in multiple numbers.

[0069] In addition, when the rotary compressor 100 is running, the oil at the bottom of the shell 1 can move upward in the axial direction by the lifting force, and then flow into the upper cavity of the shell 1. The outer peripheral wall of the stator core 3 is provided with a plurality of groove portions 311, so that a plurality of flow channels are formed between the stator core 3 and the shell 1. The oil in the upper cavity can flow back to the lower part of the shell 1 through the plurality of flow channels, respectively. Thus, the amount of oil discharged from the upper cavity through the exhaust hole 11 can be reduced, the oil discharge rate of the rotary compressor 100 can be reduced, the heat exchange efficiency of the refrigerant can be improved, the refrigeration effect can be ensured, and the user experience can be improved.

[0070] In some embodiments, the number of groove portions 311 is N, and satisfies: 0 ≤1.

[0071] Specifically, as shown in FIG. 2, the outer peripheral wall of the stator core 3 is provided with a plurality of groove portions 311, and the oil in the upper cavity can flow back to the lower part of the shell 1 through the plurality of groove portions 311, respectively. Thus, the amount of oil discharged from the upper cavity through the exhaust hole 11 can be reduced, and the number of groove portions 311 is N, and the number of stator slots 33 is Q. The number N of groove portions 311 and the number Q of stator slots 33 can be set to satisfy: 0 ≤1, that is, The value of N / Q can be set to 0.1, 0.5 or 1, etc. The number of groove portions 311 is set to be less than or equal to the number of stator slots 33, that is, the number of groove portions 311 can be set to be equal to the number of stator slots 33, or can be set to be less than the number of stator slots 33. The groove portions 311 are arranged on the outer peripheral wall of the stator core 3, and can be distributed at positions different from the stator slots 33 in the radial direction. Thus, the efficiency of the motor 2 can be ensured, that is, the number N of groove portions 311 and the number Q of stator slots 33 are set to satisfy: 0 ≤1, so that the efficiency of the motor 2 can be ensured while the oil discharge rate of the rotary compressor 100 is ensured.

[0072] In some embodiments, it satisfies: 0.4 ≤0.8.

[0073] Specifically, the outer peripheral wall of the stator core 3 is provided with a plurality of grooves 311, and the number of grooves 311 is set to N, the number of stator slots 33 is set to Q, and satisfies: 0.4 < ≤0.8, that is The value can be set to 0.5, 0.6, or 0.8, etc. Setting the groove portion 311 can reduce the amount of oil discharged from the upper cavity through the vent hole 11. Furthermore, when the groove portion 311 is set on the outer peripheral wall of the stator core 3, it can be radially offset from the stator slots 33, thereby ensuring the efficiency of the motor 2. That is, the number N of the groove portions 311 and the number Q of the stator slots 33 are set to satisfy: 0.4 < With a value of ≤0.8, the efficiency of motor 2 can be guaranteed while further ensuring the 100% oil discharge rate of the rotary compressor.

[0074] In some embodiments, the maximum depth of the groove 311 in the radial direction of the stator core 3 is L1, the maximum thickness of the yoke 31 in the radial direction is L2, and satisfies: 0 < L2. ≤1.

[0075] Specifically, the groove portion 311 is disposed on the outer peripheral wall of the stator core 3, and the groove portion 311 can be configured as an arc-shaped groove, etc. The groove portion 311 is radially recessed inward on the outer peripheral wall of the stator core 3, and the maximum radial depth of the groove portion 311 in the stator core 3 is set to L1. The yoke portion 31 is disposed on the outermost side of the stator core 3, and the groove portion 311 is formed on the outer peripheral wall of the yoke portion 31. The yoke portion 31 is configured as a ring structure, and the maximum radial thickness of the yoke portion 31 is set to L2. The maximum radial depth L1 of the groove portion 311 in the stator core 3 and the maximum radial thickness L2 of the yoke portion 31 are set to satisfy: 0 < ≤1, that is The value can be set to 0.1, 0.5, or 1, etc.

[0076] Additionally, 0 < ≤1 means that the maximum depth of the groove 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 31 in the radial direction. That is, the maximum depth of the groove 311 in the radial direction of the stator core 3 can be set to be equal to or less than the maximum thickness of the yoke 31 in the radial direction. The greater the depth of the groove 311 in the radial direction of the stator core 3, the higher the rate at which oil flows from the groove 311. However, if the depth of the groove 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: 0 < ≤1 can reduce the amount of oil discharged from the exhaust port 11 while ensuring the efficiency of motor 2 and the strength of stator core 3, thereby reducing the oil discharge rate of rotary compressor 100, improving the heat exchange efficiency of refrigerant, ensuring the cooling effect, and improving the user experience.

[0077] In some embodiments, the following condition is satisfied: 0.3 < ≤0.8.

[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, and the maximum thickness of the yoke portion 31 in the radial direction is set to L2, and satisfies: 0.3 < ≤0.8, that is The value can be set to 0.4, 0.6, or 0.8, etc. The greater the depth of the groove 311 in the radial direction of the stator core 3, the higher the flow rate of oil from the groove 311. However, if the depth of the groove 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: 0.3 < With a value of ≤0.8, the amount of oil discharged from the exhaust port 11 can be further reduced while ensuring the efficiency of the motor 2 and the strength of the stator core 3. This reduces the oil discharge rate of the rotary compressor 100, improves the heat exchange efficiency of the refrigerant, ensures the cooling effect, and enhances the user experience.

[0079] In some embodiments, the following conditions are met: 0 < L1 ≤ 15 mm; and / or, the following condition is met: 0 < L2 ≤ 15 mm.

[0080] Specifically, the groove 311 is provided on the outer peripheral wall of the stator core 3, and the maximum depth of the groove 311 in the radial direction of the stator core 3 is set to L1. The maximum depth L1 of the groove 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 311 in the radial direction of the stator core 3 can be set to 1 mm, 8 mm or 15 mm, etc. The greater the depth of the groove 311 in the radial direction of the stator core 3, the higher the rate of oil flow from the groove 311. However, if the depth of the groove 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, setting L1 to satisfy: 0 < L1 ≤ 15 mm 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 discharge rate of the rotary compressor 100, improving the heat exchange efficiency of the refrigerant, ensuring the cooling effect, and improving the user experience.

[0081] In addition, the maximum thickness of the yoke portion 31 in the radial direction is set as 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, or 15 mm, etc. The greater the thickness of the yoke portion 31 is set, the greater the depth of the corresponding groove portion 311 can be set. However, if the thickness of the yoke portion 31 is too large, the area of the stator slot 33 will be reduced, which will affect the operating efficiency of the motor 2. Therefore, the maximum thickness L2 of the yoke portion 31 in the radial direction 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.

[0082] 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, only the maximum thickness L2 of the yoke portion 31 in the radial direction can be set to satisfy: 0 < L2≤ 15 mm, or 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 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.

[0083] In some embodiments, it is satisfied that: 40 mm≤ R1≤ 70 mm; and / or, it is satisfied that: 20 mm≤ R3≤ 40 mm.

[0084] Specifically, as shown in FIG. 1, the maximum outer contour radius of the stator core 3 is set as R1, and the maximum outer contour radius R1 of the stator core 3 is set to satisfy: 40 mm≤ R1≤ 70 mm, that is, the maximum outer contour radius R1 of the stator core 3 can be set to 40 mm, 50 mm, or 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 to 20 mm, 30 mm, or 50 mm, etc.

[0085] In addition, under the condition that other dimensions remain unchanged, the smaller the maximum thickness of the yoke portion 31 is, the smaller the maximum thickness of the yoke portion 31 in the radial direction, which will reduce the reliability of the motor 2. The greater the maximum thickness of the yoke portion 31 is, the greater the maximum thickness of the yoke portion 31 in the radial direction, which will make the rigidity of the motor 2 greater, and will reduce the noise generated when the motor 2 rotates. However, the greater the thickness of the yoke portion 31 is, the smaller the area of the stator slot 33 will be, which will cause the efficiency of the motor 2 to decrease, etc. The maximum outer contour radius R1 of the stator core 3 is set to satisfy: 40 mm≤ R1≤ 70 mm, which can ensure the normal operation of the motor 2 while also improving the structural strength of the motor 2, which can ensure the operating reliability of the motor 2, prolong the service life of the motor 2, reduce the noise generated when the motor 2 operates, and improve the user experience.

[0086] And in actual setting, only the maximum outer contour radius R1 of the stator core 3 can be set to satisfy: 40mm≤R1≤70mm, only the maximum radius R3 of the rotor core 4 can be set to satisfy: 20mm≤R3≤40mm, or the maximum outer contour radius R1 of the stator core 3 is set to satisfy: 40mm≤R1≤70mm, and the maximum radius R3 of the rotor core 4 is set to satisfy: 20mm≤R3≤40mm, to improve the setting flexibility.

[0087] In some embodiments, it is satisfied that: 10mm≤H≤80mm.

[0088] Specifically, the pump body component 5 is provided with a cylinder 52, and the cylinder 52 is formed with a suction hole 521, the distance between the center line of the suction hole 521 and the end of the shell 1 away from the motor 2 is set as H, and the distance H between the center line of the suction hole 521 and the end of the shell 1 away from the motor 2 is set to satisfy: 10mm≤H≤80mm, that is, the distance H between the center line of the suction hole 521 and the end of the shell 1 away from the motor 2 can be set to 10mm, 45mm, or 80mm, etc., and the shell 1 is provided with oil liquid, which can lubricate the crankshaft 51 and the like when the rotary compressor 100 is running, to ensure the operation reliability of the crankshaft 51 and the like, and the oil liquid can be stored between the center line of the suction hole 521 and the end of the shell 1 away from the motor 2.

[0089] In addition, the larger H is, the more oil liquid is stored, which can ensure the lubrication effect on the internal parts of the rotary compressor 100 and ensure the operation reliability of the rotary compressor 100. When the rotary compressor 100 is running, the oil liquid at the bottom of the shell 1 can move upward along the axial direction by the lifting force, and then flow into the upper cavity of the shell 1. When H is too large, the oil liquid in the upper cavity is too much, 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 shell 1 away from the motor 2 is set to satisfy: 10mm≤H≤80mm, which can ensure the oil discharge rate while ensuring the lubrication effect on the internal parts of the rotary compressor 100, and improve the operation efficiency of the rotary compressor 100.

[0090] When the rotary compressor 100 is a double-cylinder rotary compressor 100, that is, the cylinder 52 is provided with two cylinders, H is the distance between the center line of the suction hole 521 of the lower cylinder 52 and the end of the shell 1 away from the motor 2.

[0091] In some embodiments, it is satisfied that: 15≤Q≤18.

[0092] Specifically, the stator slots 33 are defined between the two adjacent teeth 32 of the stator core 3, the teeth 32 are provided in plurality, the plurality of teeth 32 define the plurality of stator slots 33, the number of stator slots 33 is Q, and the number Q of stator slots 33 is set to satisfy: 15≤Q≤18, that is, the number Q of stator slots 33 can be set to 15, 16 or 18, etc., in this embodiment, the number Q of stator slots 33 is set to 15, and when the rotary compressor 100 is running, the oil in the shell 1 can flow into the upper cavity of the shell 1, and part of the oil can flow back to the lower part of the shell 1 through the gap in the stator slot 33.

[0093] In addition, the large number of stator slots 33 allows the oil to flow back through the plurality of stator slots 33, thereby improving the oil return speed of the oil and reducing the amount of oil discharged through the exhaust hole 11, but too many stator slots 33 will increase the manufacturing difficulty and cost, so the number Q of 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, ensure the refrigeration effect, and improve the user experience.

[0094] In some embodiments, 20mm≤T≤100mm is satisfied, and / or 1.6mm≤W≤12mm is satisfied.

[0095] Specifically, the axial thickness of the stator core 3 is T, and satisfies: 20mm≤T≤100mm, that is, the axial thickness T of the stator core 3 can be set to 20mm, 60mm or 100mm, etc., the slot width of the stator slot 33 is W, and satisfies: 1.6mm≤W≤12mm, the slot width W of the stator slot 33 can be set to 1.6mm, 6mm or 12mm, etc., when the rotary compressor 100 is running, the oil at the bottom of the shell 1 can move upward along the axial direction by the lifting force, and then flow into the upper cavity of the shell 1, and the oil in the upper cavity can flow back to the lower part of the shell 1 through the gap between the stator core 3 and the shell 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: 20mm≤T≤100mm and setting the slot width W of the stator slot 33 to satisfy: 1.6mm≤W≤12mm can improve the oil return speed, thereby reducing the amount of oil in the upper cavity to reduce the oil discharge rate, improve the heat exchange efficiency of the refrigerant, ensure the refrigeration effect, and improve the user experience.

[0096] And in actual settings, the axial thickness T of the stator core 3 can be set to satisfy 20mm≤T≤100mm, the slot opening width W of the stator slot 33 can be set to satisfy 1.6mm≤W≤12mm, or the axial thickness T of the stator core 3 can be set to satisfy 20mm≤T≤100mm, and the slot opening width W of the stator slot 33 can be set to satisfy 1.6mm≤W≤12mm, thereby improving the flexibility of the settings.

[0097] In some embodiments, the rotary compressor 100 further comprises a liquid accumulator 6, which is located outside the shell 1 and connected to the suction hole 521 through a suction pipe 61.

[0098] Specifically, as shown in FIG. 1, the rotary compressor 100 is provided with a liquid accumulator 6, which can be in a sealed cylindrical structure. The liquid accumulator 6 is located outside the shell 1 of the rotary compressor 100 and is provided with a suction pipe 61 in a bendable tubular structure, one end of which is in communication with the liquid accumulator 6 and the other end is in communication with the suction hole 521 of the cylinder 52. Thus, the liquid accumulator 6 can be in communication with the cylinder 52 through the suction pipe 61, and the liquid accumulator 6 and the suction hole 521 are connected through the suction pipe 61, which can improve the flexibility of the setting position of the liquid accumulator 6 and facilitate the installation of the rotary compressor 100.

[0099] In addition, the liquid accumulator 6 can store, separate, filter, mute and buffer refrigerant, and is a protective component to prevent liquid refrigerant from flowing into the rotary compressor 100 and causing liquid hammer. During the operation of the air conditioning system, liquid refrigerant can be stored in the liquid accumulator 6, and gaseous refrigerant can enter the cylinder 52 of the rotary compressor 100 through the suction pipe 61, thereby preventing the rotary compressor 100 from sucking liquid refrigerant and causing liquid hammer and other problems, ensuring the operation reliability of the rotary compressor 100. In addition, a filter screen or other structure can be arranged in the suction pipe 61 to prevent impurities from entering the rotary compressor 100 and ensure the operation reliability of the rotary compressor 100.

[0100] At the same time, when the rotary compressor 100 operates, a certain amount of oil will be discharged with the gaseous refrigerant, and this part of oil can enter the liquid accumulator 6 through the pipeline and circulate into the rotary compressor 100 under the suction force of the rotary compressor 100, thereby playing a lubricating protection role for the rotary compressor 100 and ensuring the operation reliability of the rotary compressor 100.

[0101] In some embodiments, the stator core 3 comprises a plurality of stator laminations 34 arranged in sequence along the axial direction; and / or the rotor core 4 comprises a plurality of rotor laminations 43 arranged in sequence along the axial direction.

[0102] 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 electromagnetic field, the stator winding is arranged in a stator slot 33, the rotor is provided with a rotor core 4, the rotor core 4 is arranged in the stator core 3, and when the motor 2 operates, the stator generates a magnetic field through 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 is fixed, and the rotor participates in the rotation of the motor 2.

[0103] In addition, the stator core 3 is provided with stator laminations 34, and the stator laminations 34 are arranged in multiple, the multiple stator laminations 34 are the same structure, and the multiple stator laminations 34 are arranged in sequence along the axial direction to form a complete stator core 3. The stator laminations 34 can be made of silicon steel sheets, which are thin steel plates with low carbon content, can increase resistivity, reduce eddy current loss caused by thickness direction, ensure the operation reliability of the stator core 3, and the rotor core 4 is provided with rotor laminations 43, the rotor laminations 43 are arranged in multiple, the multiple rotor laminations 43 are the same structure, and the multiple rotor laminations 43 are arranged in sequence along the axial direction to form a complete rotor core 4. The rotor laminations 43 can also be made of silicon steel sheets, thereby ensuring the operation reliability of the rotor core 4.

[0104] In actual arrangement, the stator core 3 can be arranged by multiple stator laminations 34 arranged in sequence along the axial direction, the rotor core 4 can be arranged by multiple rotor laminations 43 arranged in sequence along the axial direction, or the stator core 3 can be arranged by multiple stator laminations 34 arranged in sequence along the axial direction, and the rotor core 4 can be arranged by multiple rotor laminations 43 arranged in sequence along the axial direction, thereby improving the flexibility of arrangement.

[0105] In the embodiment, the optimal value of the distance H between the center line of the air inlet hole 521 and the end of the shell 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, the optimal value of the maximum radius R3 of the rotor core 4 is 30.5 mm, the optimal value of the ratio of the maximum radius R3 of the rotor core 4 to the minimum inner circle contour radius R2 of the stator core 3 is 0.92, and the optimal value of the ratio of the maximum outer circle contour radius R1 of the stator core 3 to the minimum inner circle contour radius R2 of the stator core 3 is 4.2.

[0106] The application also provides a refrigeration equipment.

[0107] The refrigeration equipment according to the embodiment of the application comprises the rotary compressor 100 of any one of the above.

[0108] According to the refrigeration equipment provided in the embodiments of the present application, the slot 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 2P of magnetic poles 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 motor 2 far from the shell 1 are set to satisfy: 2P≥10, 0.5≤ ≤4.2, 3≤ ≤9, thereby reducing the oil discharge rate of the rotary compressor 100, improving the heat exchange efficiency of the refrigerant, improving the energy efficiency of the rotary compressor 100, ensuring the refrigeration effect, improving the user experience, and being better in use and wider in application range.

[0109] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0110] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A rotary compressor, wherein, Comprising: a housing; a motor and a pump body component, both located in the housing, the motor comprising a stator core and a rotor core located in the stator core, the stator core comprising an annular yoke portion and a plurality of tooth portions provided on an inner peripheral wall of the yoke portion, a stator slot being formed between two adjacent tooth portions, an outer peripheral wall of the rotor core being provided with a plurality of magnetic steel grooves distributed in a circumferential direction, a magnetic steel being installed in each magnetic steel groove, the pump body component comprising a crankshaft and a cylinder, one end of the crankshaft being connected to the rotor core, the other end of the crankshaft being provided through the cylinder and connected to an eccentric member in the cylinder, the cylinder being provided with an air suction hole open outward in a radial direction; wherein the slot opening width of the stator slot is W, the number of the stator slots is Q, the maximum outer circle profile radius of the stator core is R1, the minimum inner circle profile radius of the stator core is R2, the axial thickness of the stator core is T, the number of the 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 suction hole and the end of the housing far from the motor is H, and 2P≥10, 0.5≤ ≤4.2，3≤ ≤9。 2. The rotary compressor of claim 1, wherein, satisfies: 0.93≤ ≤ 3.02, 3.5≤ ≤ 7.

3. The rotary compressor of claim 1 or 2, wherein, The shell is provided with an exhaust hole, the aperture of the exhaust hole is D, and the following is satisfied: 0.072≤D≤0.

378. ≤0.

378.

4. The rotary compressor of claim 3, wherein, 5mm≤D≤17mm is satisfied.

5. The rotary compressor of claim 3 or 4, wherein, satisfies: 0.049 ≤ ≤ 0.

17.

6. The rotary compressor of any one of claims 1-5, wherein, The outer peripheral wall of the stator core is provided with a plurality of groove portions, and the plurality of groove portions are distributed in a circumferential direction of the stator core with intervals.

7. The rotary compressor of claim 6, wherein, The number of the recessed portions is N, and satisfies: 0 < N ≤ 1. ≤1.

8. The rotary compressor of claim 7, wherein the following is satisfied: 0.4＜ ≤0.8。 9. The rotary compressor of any one of claims 6-8, wherein, The maximum depth of the recess 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 is satisfied: 0 < L1 / L2 ≤ 1. ≤1.

10. The rotary compressor of claim 9, wherein the following is satisfied: 0.3＜ ≤0.8。 11. The rotary compressor of claim 9 or 10, wherein, 0 And / or, 0 12. The rotary compressor of any one of claims 1-11, wherein, 40mm≤R1≤70mm is satisfied. And / or, 20mm≤R3≤40mm is satisfied.

13. The rotary compressor of any one of claims 1-12, wherein, 10mm≤H≤80mm is satisfied.

14. The rotary compressor of any one of claims 1-13, wherein, 15≤Q≤18 is satisfied.

15. The rotary compressor of any one of claims 1-14, wherein, 20mm≤T≤100mm is satisfied. And / or, 1.6mm≤W≤12mm is satisfied.

16. The rotary compressor of any one of claims 1-15, wherein, Further comprising a liquid reservoir located outside the housing, an air suction pipe being connected between the liquid reservoir and the air suction hole.

17. The rotary compressor of any one of claims 1-16, wherein, The stator core comprises a plurality of stator laminations, and the plurality of stator laminations are distributed in an axial direction in sequence. And / or, the rotor core comprises a plurality of rotor laminations, and the plurality of rotor laminations are distributed in an axial direction in sequence.

18. A refrigeration appliance, wherein, The rotary compressor of any one of claims 1-17 is included.

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