Rotary compressor and refrigeration device

Abstract

A rotary compressor (1) and a refrigeration device. The rotary compressor (1) comprises an electric motor (11) and a cylinder (12), wherein the electric motor (11) is provided with a rotor iron core (111) and permanent magnets (112), a plurality of magnet slots (113) are formed in the rotor iron core (111), and the thickness of the rotor iron core (111) is L; the permanent magnets (112) are accommodated in the magnet slots (113), and the thickness of the permanent magnets (112) is T; the number of rotor poles of the electric motor (11) is P; the number Q of stator slots and the number P of rotor poles satisfy the relationship: 5≤the greatest common divisor (GCD) (Q, P）≤6; a compression cavity is formed in the cylinder (12), and a crankshaft (13) connected to the electric motor (11) is arranged in the compression cavity; and the height of the cylinder (12) is H, and satisfies the relationship: 0.15≤T*L / (H*P)≤0.8.

Description

Rotary compressor and refrigeration device

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024218750158, filed on August 2, 2024, entitled “Rotary compressor and refrigeration device” and Chinese Patent Application No. 2024110639212, filed on August 2, 2024, entitled “Rotary compressor and refrigeration device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

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

[0004] In the field of rotary compressors, the design and optimization of the motor play a crucial role in improving the overall performance and energy efficiency ratio of the rotary compressor. With the continuous progress of rotary compressor technology and changes in market demand, miniaturization and lightweight have become important trends in the industry.

[0005] In the process of miniaturization and lightweight of rotary compressors, the motor efficiency is often reduced, which directly affects the overall energy efficiency level of the rotary compressor. SUMMARY

[0006] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to propose a rotary compressor. According to the rotary compressor of the present application, the optimization matching of the motor and the cylinder is achieved, and the energy efficiency, space utilization and overall performance of the rotary compressor are improved.

[0007] The present application also proposes a refrigeration device having the above rotary compressor.

[0008] The rotary compressor according to the present application comprises: a motor provided with a rotor core and a permanent magnet, a plurality of magnet grooves are formed on the rotor core and the thickness of the rotor core is L, the permanent magnet is accommodated in the magnet groove and the thickness of the permanent magnet is T, the rotor pole number of the motor is P; the stator slot number Q and the rotor pole number P satisfy the relationship: the greatest common divisor 5≤GCD(Q, P)≤6; a cylinder, a compression cavity is formed in the cylinder, a crankshaft connected with the motor is arranged in the compression cavity, the height of the cylinder is H; and satisfy: 0.15≤T*L / (H*P)≤0.8.

[0009] According to the rotary compressor of the present application, the motor and the cylinder cooperate to realize the compression and delivery of gas. A plurality of magnet slots for accommodating permanent magnets are formed on the rotor core. The permanent magnets are used to generate a magnetic field to drive the rotation of the rotor. The rotor core thickness L refers to the dimension of the rotor core along its axial direction. The rotor core thickness L and the thickness T of the permanent magnet jointly determine the configuration and strength of the magnetic field inside the motor.

[0010] The number of rotor poles P of the motor is also an important factor affecting the performance of the motor. The selection of the number of poles needs to consider the speed, torque output and other characteristics of the motor. By reasonably setting the number of rotor poles P of the motor, the optimization of the performance of the motor is realized.

[0011] The number of stator slots Q and the number of rotor poles P satisfy the relationship: the greatest common divisor 5≤GCD(Q, P)≤6. The stator slot is a space in the motor stator for placing the winding, and the stator slot Q determines the structure and electrical performance of the motor winding. The number of rotor poles P refers to the number of magnetic poles on the motor rotor, which affects the magnetic field distribution and torque characteristics of the motor. Increasing the number of rotor poles P leads to a decrease in the speed of the motor, thereby affecting the performance of the motor.

[0012] The greatest common divisor GCD(Q, P) between the number of stator slots Q and the number of rotor poles P is greater than or equal to 5 and less than or equal to 6, which helps to smooth the waveform of the cogging torque, reduces its peak value, thereby reducing the vibration and noise of the motor 11, and improving the running stability of the rotary compressor 1. Reasonable pole-slot matching helps to improve the energy efficiency ratio of the motor 11, and further enhances the overall performance of the motor 11.

[0013] A compression cavity is formed in the cylinder, which is used to contain and compress gas. The crankshaft is arranged in the compression cavity and connected with the motor. The crankshaft transmits the power of the motor to the working components of the rotary compressor through rotary motion, thereby driving the compression process of the gas.

[0014] The cylinder height H refers to the dimension of the cylinder along its axial direction. The cylinder height H not only affects the overall size of the rotary compressor, but also is closely related to the energy transmission efficiency.

[0015] The thickness T of the permanent magnet and the thickness L of the rotor core directly affect the strength and stability of the magnetic field of the motor. A proper T*L can generate a strong enough magnetic field to drive the rotation of the rotor and output stable torque. H*P is closely related to the speed and electromagnetic characteristics of the motor and the overall size of the rotary compressor. Therefore, T*L / (H*P) is within the range of 0.15 to 0.8, which can realize the optimal matching between the motor and the cylinder, reduce the loss in the energy transmission process, improve the conversion efficiency of the motor, and thus ensure the overall energy efficiency level of the rotary compressor. On the premise of ensuring the performance of the rotary compressor, a smaller overall size is realized, and the space utilization is improved.

[0016] According to some embodiments of the present application, 0.15≤T*L / (H*P)≤0.5.

[0017] According to some embodiments of the present application, 0.15≤T*L / (H*P)≤0.28.

[0018] According to some embodiments of the present application, the thickness L of the rotor core satisfies: 20mm≤L≤50mm.

[0019] According to some embodiments of the present application, the cylinder is configured as a plurality of cylinders, each of which is provided with a compression chamber, wherein the height of any one of the cylinders is H, and satisfies: 0.19≤T*L / (H*P)≤0.71.

[0020] According to some embodiments of the present application, the cylinder is configured as a plurality of cylinders, each of which is provided with a compression chamber, and the heights of the plurality of cylinders are H1, H2, …, Hn, and satisfy: H1=H2=…=Hn. / n.

[0021] According to some embodiments of the present application, the thickness L of the rotor core satisfies: 35mm≤L≤80mm.

[0022] According to some embodiments of the present application, the thickness T of the permanent magnet and the width W of the permanent magnet satisfy the relationship: 0.08≤T / W≤0.23.

[0023] According to some embodiments of the present application, the thickness T of the permanent magnet satisfies: 1.0mm≤T≤3.0mm.

[0024] According to some embodiments of the present application, the length of the permanent magnet in the axial direction is L0 and satisfies: 0mm≤L-L0≤3mm.

[0025] According to some embodiments of the present application, the plurality of magnet grooves are uniformly distributed in a circle with the center axis of the rotor core as a reference, the magnetic poles of the permanent magnets in any two adjacent magnet grooves are opposite, and the interval angle of the two adjacent magnetic poles and the center axis of the rotor core is θ and satisfies: 30°≤θ≤36°.

[0026] According to some embodiments of the present application, the number of phases of the motor is m, the number of slots per pole per phase of the motor is q, q=Q / mP, q<1.

[0027] According to some embodiments of the present application, the magnet grooves are configured as permanent magnets arranged in a "one" shape on the rotor core or a "V" shape or a "U" shape, and the number of rotor poles P satisfies: 10≤P≤12.

[0028] The refrigeration device according to the present application is briefly described below.

[0029] The refrigeration equipment according to the present application comprises the rotary compressor described in any one of the above embodiments. Since the refrigeration equipment according to the present application comprises the rotary compressor described in any one of the above embodiments, the refrigeration equipment according to the present application, by adopting the rotary compressor which is compact in structure and high in energy efficiency, not only significantly improves the refrigeration efficiency, but also realizes the miniaturization and light weight of the equipment, and provides the user with a more efficient and comfortable experience.

[0030] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 is a structural schematic diagram of a rotary compressor according to some embodiments of the present application;

[0032] Fig. 2 is a cross-sectional schematic diagram of a motor of the rotary compressor according to some embodiments of the present application;

[0033] Fig. 3 is an end surface schematic diagram of a rotor core of the motor of the rotary compressor according to some embodiments of the present application;

[0034] Fig. 4 is a structural schematic diagram of a permanent magnet of the motor of the rotary compressor according to some embodiments of the present application;

[0035] Fig. 5 is a structural schematic diagram of a cylinder body of the rotary compressor according to some embodiments of the present application;

[0036] Fig. 6 is a plan schematic diagram of the cylinder body of the rotary compressor according to some embodiments of the present application;

[0037] Fig. 7 is a cross-sectional schematic diagram of A-A in Fig. 6;

[0038] Fig. 8 is a trend curve of energy efficiency difference of the rotary compressor according to an embodiment of the present application under different design parameters in the formula 0.15≤T*L / (H*P)≤0.8.

[0039] Reference signs:

[0040] 1, rotary compressor;

[0041] 11, motor, 111, rotor core, 112, permanent magnet, 113, magnet slot;

[0042] 12, cylinder body;

[0043] 13, crankshaft. Embodiments of the present application

[0044] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended only for the purpose of explaining the present application, and should not be understood as limiting the present application.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying 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, features defined with "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0046] 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.

[0047] In the related art, in the process of miniaturization and light weight of the rotary compressor, the motor efficiency is often reduced, and the reduction of the motor efficiency directly affects the overall energy efficiency level of the rotary compressor.

[0048] The rotary compressor 1 according to an embodiment of the present application is described below with reference to FIGS. 1-8.

[0049] As shown in FIGS. 1-7, the rotary compressor 1 according to the present application includes a motor 11 and a cylinder 12, the motor 11 is provided with a rotor core 111 and a permanent magnet 112, a plurality of magnet grooves 113 are formed on the rotor core 111 and the thickness of the rotor core 111 is L, the permanent magnet 112 is accommodated in the magnet groove 113 and the thickness of the permanent magnet 112 is T, the rotor pole number of the motor 11 is P; the cylinder 12 is formed with a compression cavity, the compression cavity is provided with a crankshaft 13 connected with the motor 11, the height of the cylinder 12 is H; and satisfies: 0.15≤T*L / (H*P)≤0.8.

[0050] According to the rotary compressor 1 of the present application, the motor 11 and the cylinder 12 cooperate to achieve the compression and delivery of gas. A plurality of magnet slots 113 for accommodating permanent magnets 112 are formed on the rotor core 111. The permanent magnets 112 are used to generate a magnetic field of the motor 11 to drive the rotation of the rotor. The rotor core 111 thickness L refers to the dimension of the rotor core 111 along its axial direction. The rotor core 111 thickness L and the thickness T of the permanent magnet 112 jointly determine the configuration and strength of the magnetic field inside the motor 11.

[0051] The rotor pole number P of the motor 11 is also an important factor affecting the performance of the motor 11. The selection of the pole number needs to consider the speed, torque output and other characteristics of the motor 11. By reasonably setting the rotor pole number P of the motor 11, the performance of the motor 11 is optimized.

[0052] The stator slot number Q and the rotor pole number P satisfy the relationship: the greatest common divisor 5≤GCD(Q, P)≤6. The stator slot is a space in the stator of the motor 11 for placing the winding, and the stator slot Q determines the structure and electrical performance of the winding of the motor 11. The rotor pole number P refers to the number of magnetic poles on the rotor of the motor 11, which affects the magnetic field distribution and torque characteristics of the motor 11. Increasing the rotor pole number P leads to a decrease in the speed of the motor 11, thereby affecting the performance of the motor.

[0053] The greatest common divisor GCD(Q, P) between the stator slot number Q and the rotor pole number P is greater than or equal to 5 and less than or equal to 6, which helps to smooth the waveform of the cogging torque and reduce its peak value, thereby reducing the vibration and noise of the motor 11 and improving the running stability of the rotary compressor 1. Reasonable pole-slot matching helps to improve the energy efficiency ratio of the motor 11 and further enhance the overall performance of the motor 11.

[0054] The cylinder 12 has a compression cavity formed therein for accommodating and compressing gas. The crankshaft 13 is disposed in the compression cavity and connected to the motor 11. The crankshaft 13 transmits the power of the motor 11 to the working components of the rotary compressor 1 through rotational motion, thereby driving the compression process of the gas.

[0055] The cylinder 12 height H refers to the dimension of the cylinder 12 along its axial direction. The cylinder 12 height H not only affects the overall size of the rotary compressor 1, but also is closely related to the energy transmission efficiency.

[0056] The thickness T of the permanent magnet 112 and the thickness L of the rotor core 111 directly affect the strength and stability of the magnetic field of the motor 11. A proper T*L can generate a strong enough magnetic field to drive the rotation of the rotor and output stable torque. H*P is closely related to the rotation speed and electromagnetic characteristics of the motor 11 and the overall size of the rotary compressor 1. Therefore, T*L / (H*P) is in the range of 0.15 to 0.8, which can achieve an optimal matching between the motor 11 and the cylinder 12, reduce the loss in the energy transmission process, improve the conversion efficiency of the motor 11, and thus ensure the overall energy efficiency level of the rotary compressor 1, and realize a smaller overall size under the premise of ensuring the performance of the rotary compressor 1, and improve the space utilization.

[0057] Therefore, according to the rotary compressor 1 of the present application, the optimal matching between the motor 11 and the cylinder 12 is achieved, and the energy efficiency, space utilization and overall performance of the rotary compressor 1 are improved.

[0058] It should be noted that, as shown in FIG. 8, in the energy efficiency characteristic analysis of the rotary compressor 1 exhibited in the embodiments of the present application, when T*L / (H*P) is in the range of 0.15 to 0.8, the energy efficiency improvement rate of the rotary compressor 1 shows a trend of first increasing and then decreasing. With the increase of the T*L / (H*P) ratio, the energy efficiency improvement rate first gradually increases, reaches a certain peak value, and then gradually decreases. Further, when the T*L / (H*P) ratio exceeds 0.8, the energy efficiency improvement rate not only continuously decreases until it approaches zero, but then turns negative.

[0059] According to some embodiments of the present application, 0.15≤T*L / (H*P)≤0.5. When T*L / (H*P) is in the range of 0.15 to 0.5, the energy efficiency improvement rate of the rotary compressor 1 is significantly and stably maintained at a high level. The motor 11 can generate a stable and strong magnetic field to efficiently drive the rotation of the rotor, while reducing the loss of energy in the transmission process and optimizing the overall size of the rotary compressor 1, improving the space utilization, so that the rotary compressor 1 is more compact while maintaining high performance.

[0060] According to some embodiments of the present application, 0.15≤T*L / (H*P)≤0.28. When T*L / (H*P) is in the range of 0.15 to 0.28, the energy efficiency improvement rate of the rotary compressor 1 reaches a peak value, and the energy efficiency improvement rate of the rotary compressor 1 is significantly and stably maintained at a high level. The motor 11 can generate an extremely stable and strong magnetic field to drive the rotation of the rotor with extreme efficiency, thereby achieving minimal loss of energy in the transmission process. In addition, the overall size of the rotary compressor 1 is further optimized, and the space utilization reaches a new height, so that the rotary compressor 1 can still exhibit high performance in a compact volume.

[0061] According to some embodiments of the present application, as shown in FIG. 1 and FIG. 2, the thickness L of the rotor core 111 satisfies: 20mm≤L≤50mm. The value of L can be any value greater than or equal to 20mm and less than or equal to 50mm. The thickness of the rotor core 111 directly affects the electromagnetic performance of the motor 11. By setting the thickness L of the rotor core 111 in the range of 20mm to 50mm, it helps to optimize the magnetic field distribution inside the motor 11, and the motor 11 can more effectively convert electrical energy into mechanical energy, improving overall energy efficiency. The rotor core 111 can meet the torque and speed requirements of the rotary compressor 1, maintain high energy conversion efficiency, and avoid unnecessary material waste and cost increase.

[0062] According to some embodiments of the present application, the cylinder 12 is configured as multiple, and each cylinder 12 is provided with a compression chamber. Multiple cylinders 12 can simultaneously compress gas, improve the gas processing capacity of the rotary compressor 1, and realize the continuity and efficiency of the compression process. Multiple cylinders 12 work simultaneously, which can effectively disperse the load of single compression, reduce vibration and noise, and improve the operation stability of the rotary compressor 1.

[0063] The height of any one of the multiple cylinders 12 is H, and satisfies: 0.19≤T*L / (H*P)≤0.71, which realizes more refined matching and optimization between the motor 11 and the cylinder 12, can further reduce the overall size while maintaining high performance of the rotary compressor 1, improve space utilization, and meet the needs of various compact space installations.

[0064] According to some embodiments of the present application, the cylinder 12 is configured as multiple, and each cylinder 12 is provided with a compression chamber. Multiple cylinders 12 can simultaneously compress gas, improve the gas processing capacity of the rotary compressor 1, and realize the continuity and efficiency of the compression process. Multiple cylinders 12 work simultaneously, which can effectively disperse the load of single compression, reduce vibration and noise, and improve the operation stability of the rotary compressor 1.

[0065] The height of the multiple cylinders 12 is H1, H2, ……Hn, and satisfies: H= / n. H is the average height of the multiple cylinders 12, and satisfies 0.15≤T*L / (H*P)≤0.8, which not only considers the optimal configuration of the motor 11 driving efficiency and magnetic field strength, but also takes into account the compactness of the overall structure of the rotary compressor 1.

[0066] According to some embodiments of the present application, the thickness L of the rotor core 111 satisfies: 35mm≤L≤80mm. For the rotary compressor 1 with multiple cylinders 12, by setting the thickness L of the rotor core 111 in the range of 35mm to 80mm, not only the structural strength of the motor 11 is ensured to withstand the centrifugal force generated during high-speed rotation, but also the electromagnetic performance of the motor 11 is optimized to maintain a high-efficiency and stable operating state when driving the rotary compressor 1 to work. The rotor core 111 can not only meet the requirements of torque and rotational speed of the rotary compressor 1, but also maintain a high energy conversion efficiency.

[0067] According to some embodiments of the present application, as shown in FIGS. 3 and 4, the thickness T of the permanent magnet 112, the width W of the permanent magnet 112 satisfy the relationship: 0.08≤T / W≤0.23. The thickness T of the permanent magnet 112 directly affects the strength and stability of the magnetic field. Thicker permanent magnet 112 can generate a stronger magnetic field, but it may also lead to an increase in the volume and cost of the motor 11. The width W of the permanent magnet 112 is closely related to the overall structure and electromagnetic properties of the motor 11, and determines the distribution and transmission path of the magnetic flux. By setting the ratio of T / W in the range of 0.08 to 0.23, the thickness of the permanent magnet 112 is small and the width is large, which helps to reduce the volume of the motor 11, thereby realizing the compactness of the rotary compressor 1, and the permanent magnet 112 can generate a strong and stable magnetic field to drive the motor 11 to operate efficiently, and the electromagnetic properties of the permanent magnet 112 are well optimized, which helps to reduce energy loss and improve the conversion efficiency of the motor 11.

[0068] According to some embodiments of the present application, the thickness T of the permanent magnet 112 satisfies: 1.0mm≤T≤3.0mm. By limiting the thickness T of the permanent magnet 112 to be between 1.0mm and 3.0mm, the permanent magnet 112 can provide a strong enough magnetic field to maintain sufficient magnetic field strength and stability to meet the requirements of efficient operation of the motor 11, while helping to reduce the overall volume of the motor 11, thereby realizing the compactness of the rotary compressor 1.

[0069] According to some embodiments of the present application, as shown in FIG. 4, the permanent magnet 112 has a length L0 in the axial direction and satisfies: 0mm≤L-L0≤3mm.

[0070] “0mm≤L-L0” means that the thickness L of the rotor core 111 is not less than the length L0 of the permanent magnet 112 in the axial direction, so in the axial direction, the permanent magnet 112 is completely contained in the rotor core 111, or the thickness of the rotor core 111 is at least equal to the length of the permanent magnet 112, which can ensure that the permanent magnet 112 is stably supported and positioned in the rotor core 111, while also helping to improve the overall structure and electromagnetic performance of the motor 11.

[0071] "L-L0≤3mm" specifies the upper limit of the difference between the thickness L of the rotor core 111 and the length L0 of the permanent magnet 112. Even if the thickness L of the rotor core 111 is greater than the length L0 of the permanent magnet 112, the excess cannot exceed 3mm in order to control the overall size of the motor 11.

[0072] According to some embodiments of the present invention, multiple magnet slots 113 are evenly distributed circumferentially with reference to the central axis of the rotor core 111, which helps to achieve uniformity and symmetry of the magnetic field of the motor 11. The permanent magnets 112 in any two adjacent magnet slots 113 have opposite magnetic poles, thereby generating an alternating magnetic field. The alternating magnetic field interacts with the windings in the stator, and when current flows through the stator, a rotating magnetic field is generated in the air gap. Due to the alternating arrangement of the magnetic poles of the permanent magnets 112, the rotating magnetic field can rotate continuously and smoothly, thereby driving the rotor to rotate. For example, if the north pole of the permanent magnet 112 in one magnet slot 113 faces outward, then the south pole of the permanent magnet 112 in the adjacent magnet slot 113 faces outward (or vice versa).

[0073] The angle between two adjacent magnetic poles and the central axis of the rotor core 111 is θ, satisfying the condition: 30° ≤ θ ≤ 36°. A smaller angle θ (e.g., 30°) means a higher number of pole pairs, thus providing higher torque density and smoother torque output. A larger angle θ (e.g., 36°) reduces the number of pole pairs, simplifies the structure of the motor 11, and reduces manufacturing difficulty and cost. By setting the angle θ between two adjacent magnetic poles and the central axis of the rotor core 111 within the range of 30° to 36°, both the performance requirements of the motor 11 and the ease and economy of manufacturing are taken into account.

[0074] According to some embodiments of the present invention, the number of phases of the motor 11 is m. The number of phases m of the motor 11 refers to the number of coil groups inside the motor 11. The number of phases determines the complexity of the number and direction changes of the magnetic fields generated simultaneously during the operation of the motor 11. Increasing the number of phases m can improve the torque and power output of the motor 11, but it will also increase the complexity and cost of the motor 11.

[0075] The number of slots per pole and per phase of motor 11 is q. The number of slots per pole and per phase q refers to the number of consecutive slots occupied by each phase winding under each magnetic pole, which affects the electromagnetic performance and operating characteristics of motor 11.

[0076] The number of phases m of motor 11 and the number of slots q per pole per phase of motor 11 satisfy: q = Q / mP, q < 1. Under the given conditions of the number of stator slots Q and the number of poles P of motor 11, the average number of slots q occupied by each phase winding under each magnetic pole is less than 1, so as to achieve the best electromagnetic performance and operating efficiency.

[0077] According to some embodiments of the present invention, the magnet slot 113 is constructed such that the permanent magnets 112 are distributed in a “I” shape, a “V” shape, or a “U” shape on the rotor core 111, and the rotor pole number P satisfies: 10≤P≤12.

[0078] A "I"-shaped distribution indicates that the permanent magnets 112 are placed in the straight slots of the rotor core 111, forming a straight line arrangement. This distribution method is simple and direct, suitable for scenarios requiring high torque density and low manufacturing costs. A "V"-shaped distribution indicates that the permanent magnets 112 are placed on the rotor core 111 in a certain way (such as tilted or at a specific angle), forming a shape similar to a "V". This helps to improve the magnetic field distribution of the motor 11, reduce leakage flux, and improve the efficiency and performance of the motor 11. A "U"-shaped distribution indicates that the permanent magnets 112 are placed on the rotor core 111 in a certain way, forming a shape similar to a "U". This can also have a positive impact on the magnetic field distribution and performance of the motor 11.

[0079] By setting the rotor pole number P within the range of 10 to 12, the motor 11 can achieve efficient energy conversion and stable operating characteristics, ensuring that the motor 11 provides sufficient torque and power output in the operating environment of the rotary compressor 1 to cope with load changes during the compression process. In addition, a reasonable rotor pole number can also optimize the speed range of the motor 11, making it better match the working requirements of the rotary compressor 1 and improving the efficiency and reliability of the overall system.

[0080] In summary, the rotary compressor 1 according to embodiments of the present invention includes a motor 11 and a cylinder 12. By optimizing T*L / (H*P) between 0.15 and 0.8, improvements in energy efficiency, space utilization, and overall performance are achieved. When T*L / (H*P) is within the range of 0.15 to 0.5, the energy efficiency improvement rate of the rotary compressor 1 is significantly and stably maintained at a high level. When T*L / (H*P) is within the range of 0.15 to 0.28, the energy efficiency improvement rate of the rotary compressor 1 reaches a peak, and the energy efficiency improvement rate of the rotary compressor 1 is significantly and stably maintained at a high level. By setting the thickness L of the rotor core 111 within the range of 20mm to 50mm, the magnetic field distribution inside the motor 11 is optimized, enabling the motor 11 to more effectively convert electrical energy into mechanical energy, thereby improving overall energy efficiency. By constructing multiple cylinders 12, multiple cylinders 12 can compress gas simultaneously, improving the gas handling capacity of the rotary compressor 1 and achieving continuity and high efficiency in the compression process. The height of any one of the cylinders 12 is H, and satisfies: 0.19 ≤ T*L / (H*P) ≤ 0.71. This achieves a more refined matching and optimization between the motor 11 and the cylinder 12, enabling a further reduction in overall size and improved space utilization while maintaining the high performance of the rotary compressor 1, thus meeting the needs of various compact space installations. The heights of the multiple cylinders 12 are H1, H2, ..., Hn, and satisfy: H = H is the average height of the multiple cylinders 12, and satisfies 0.15≤T*L / (H*P)≤0.8. This not only considers the optimal configuration of the driving efficiency and magnetic field strength of the motor 11, but also takes into account the compactness of the overall structure of the rotary compressor 1. By setting the thickness L of the rotor core 111 within the range of 35mm to 80mm, not only is sufficient structural strength of the motor 11 ensured to withstand the centrifugal force generated during high-speed rotation, but the electromagnetic performance of the motor 11 is also optimized, enabling it to maintain a highly efficient and stable operating state when driving the rotary compressor 1. By setting the T / W ratio within the range of 0.08 to 0.23, the permanent magnet 112 has a small thickness and a large width, which helps to reduce the volume of the motor 11, thereby achieving the compactness of the rotary compressor 1. Furthermore, the permanent magnet 112 can generate a sufficiently strong and stable magnetic field to drive the motor 11 to operate efficiently, and the electromagnetic characteristics of the permanent magnet 112 are well optimized, which helps to reduce energy loss and improve the conversion efficiency of the motor 11. By limiting the thickness T of the permanent magnet 112 to between 1.0 mm and 3.0 mm, the permanent magnet 112 can provide a sufficiently strong magnetic field to maintain sufficient magnetic field strength and stability to meet the requirements of efficient operation of the motor 11, while also helping to reduce the overall size of the motor 11, thereby achieving the compactness of the rotary compressor 1. The axial length of the permanent magnet 112 is L0 and satisfies: 0 mm ≤ L - L0 ≤ 3 mm. On the one hand, this ensures that the permanent magnet 112 is stably supported and positioned in the rotor core 111, while also helping to improve the overall structure and electromagnetic performance of the motor 11; on the other hand, it allows for control of the overall size of the motor 11.

[0081] The refrigeration device according to the present invention is briefly described below.

[0082] The refrigeration device according to the present invention includes the rotary compressor 1 in any of the above embodiments. Since the refrigeration device according to the present invention includes the rotary compressor 1 in any of the above embodiments, the refrigeration device according to the present invention, by employing a compact and energy-efficient rotary compressor 1, not only significantly improves refrigeration efficiency but also achieves miniaturization and weight reduction of the device, providing users with a more efficient and comfortable experience.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotary compressor, wherein, The motor (11) is provided with a rotor core (111) and a permanent magnet (112), the rotor core (111) is formed with a plurality of magnet grooves (113) and has a thickness L, the permanent magnet (112) is accommodated in the magnet groove (113) and has a thickness T, and the rotor pole number of the motor (11) is P. The stator slot number Q and the rotor pole number P satisfy the relationship: maximum common divisor 5≤GCD (Q, P) ≤6. The cylinder (12) is formed with a compression cavity, the compression cavity is provided with a crankshaft (13) connected with the motor (11), the height of the cylinder (12) is H, and the relationship 0.15≤T*L / (H*P) ≤0.8 is satisfied. 0.15≤T*L / (H*P) ≤0.

5.

2. The rotary compressor of claim 1, wherein, 0.15≤T*L / (H*P) ≤0.

28.

3. The rotary compressor of claim 2, wherein, The thickness L of the rotor core (111) satisfies 20mm≤L≤50mm.

4. The rotary compressor according to any one of claims 1 to 3, wherein The cylinder (12) is configured as a plurality of cylinders, each of which is provided with a compression cavity, wherein the height of any one of the cylinders (12) is H, and the relationship 0.19≤T*L / (H*P) ≤0.71 is satisfied.

5. The rotary compressor of claim 1, wherein, The thickness L of the rotor core (111) satisfies 35mm≤L≤80mm.

6. The rotary compressor of claim 1, wherein, The cylinder (12) is configured as a plurality, each of the cylinder (12) is provided with a compression chamber, the height of the plurality of cylinder (12) is H1, H2, ……Hn, and satisfies: H= / n.

7. The rotary compressor of claim 5 or 6, wherein, The thickness T of the permanent magnet (112) and the width W of the permanent magnet (112) satisfy the relationship 0.08≤T / W≤0.

23.

8. The rotary compressor of claim 1, wherein, The thickness T of the permanent magnet (112) satisfies 1.0mm≤T≤3.0mm.

9. The rotary compressor of claim 8, wherein, The length of the permanent magnet (112) in the axial direction is L0, and the relationship 0mm≤L-L0≤3mm is satisfied.

10. The rotary compressor of claim 1, wherein, The plurality of magnet grooves (113) are uniformly distributed in a circle with the center axis of the rotor core (111) as the reference, the magnetic poles of the permanent magnets (112) in any two adjacent magnet grooves (113) are opposite, and the interval angle of the two adjacent magnetic poles and the center axis of the rotor core (111) is θ, and the relationship 30°≤θ≤36° is satisfied.

11. The rotary compressor of claim 1, wherein, The phase number of the motor (11) is m, the number of slots per phase per pole of the motor (11) is q, q=Q / mP, and q<1.

12. The rotary compressor of claim 11, wherein, The magnet grooves (113) are configured as the permanent magnets (112) in the "one" shape distribution or the "V" shape distribution or the "U" shape distribution on the rotor core (111), and the rotor pole number P satisfies 10≤P≤12.

13. The rotary compressor of claim 11 or 12, wherein, The rotating compressor comprises the motor (11) according to any one of claims 1-13.

14. A refrigeration appliance, wherein, ​

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