Rotary compressor and refrigeration equipment

Abstract

The utility model discloses a rotary compressor and refrigeration equipment, the rotary compressor comprises a motor and a cylinder body, the motor is provided with a rotor iron core and permanent magnets, a plurality of magnet grooves are formed on the rotor iron core, the thickness of the rotor iron core is L, the permanent magnets are accommodated in the magnet grooves, the thickness of the permanent magnets is T, and the pole number of the motor is P; the number Q of stator slots and the number P of rotor poles meet the following relation: the largest common divisor GCD (Q, P) is greater than or equal to 5 and less than or equal to 6; a compression cavity is formed in the cylinder body, a crankshaft connected with the motor is arranged in the compression cavity, and the height of the cylinder body is H; t * L / (H * P) is greater than or equal to 0.15 and less than or equal to 0.8. According to the rotary compressor disclosed by the utility model, the optimized matching of the motor and the cylinder body is realized, and the energy efficiency, the space utilization rate and the overall performance of the rotary compressor are improved.

Description

Technical Field

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

[0002] In the field of rotary compressor technology, the design and optimization of motors play a crucial role in improving the overall performance and energy efficiency ratio of rotary compressors. With the continuous progress of rotary compressor technology and the change of market demand, miniaturization and lightweight have become important trends in the industry development.

[0003] In the process of miniaturization and lightweight of rotary compressors, the reduction of motor efficiency often occurs, and the reduction of motor efficiency will directly affect the overall energy efficiency level of rotary compressors. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a rotary compressor. According to the rotary compressor of the utility model, the optimal matching between the motor and the cylinder block is realized, and the energy efficiency, space utilization rate and overall performance of the rotary compressor are improved.

[0005] The utility model also provides a refrigeration device with the above rotary compressor.

[0006] The rotary compressor according to the utility model includes: a motor, the motor is provided with a rotor core and a permanent magnet, a plurality of magnet slots are formed on the rotor core and the thickness of the rotor core is L, the permanent magnet is received in the magnet slot and the thickness of the permanent magnet is T, the number of poles of the motor is P; the number of stator slots Q and the number of rotor poles P satisfy the relationship: greatest common divisor 5 ≤ GCD(Q, P) ≤ 6; a cylinder block, a compression cavity is formed in the cylinder block, a crankshaft connected to the motor is arranged in the compression cavity, and the height of the cylinder block is H; and it satisfies: 0.15 ≤ T * L / (H * P) ≤ 0.8.

[0007] According to the rotary compressor of the utility model, the motor and the cylinder block cooperate together to realize the compression and transportation of gas. A plurality of magnet slots for receiving permanent magnets are formed on the rotor core. The permanent magnet is used to generate a motor magnetic field to drive the rotor to rotate. The thickness L of the rotor core refers to the dimension of the rotor core along its axial direction. The thickness L of the rotor core and the thickness T of the permanent magnet jointly determine the configuration and intensity of the magnetic field inside the motor.

[0008] The number of 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 comprehensively consider the characteristics such as the rotational speed and torque output of the motor. By reasonably setting the number of poles P of the motor, the optimization of the motor performance is realized.

[0009] The number of stator slots Q and the number of rotor poles P satisfy the relationship: 5 ≤ GCD(Q, P) ≤ 6. The stator slots are the spaces in the motor stator for placing windings. The stator slots Q determine the structure and electrical performance of the motor windings. 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. An increase in the number of rotor poles P results in a decrease in the motor speed, thereby affecting the motor performance.

[0010] The greatest common divisor GCD(Q, P) between the number of stator slots Q and the number of rotor poles P being greater than or equal to 5 and less than or equal to 6 helps to smooth the waveform of the cogging torque, reduce its peak value, thereby reducing the vibration and noise of the motor 11 and improving the running smoothness of the rotary compressor 1. A reasonable pole-slot combination helps to improve the energy efficiency ratio of the motor 11 and further enhance the overall performance of the motor 11.

[0011] A compression cavity is formed in the cylinder block. The compression cavity is used to accommodate gas and compress it. The crankshaft is arranged in the compression cavity and connected to the motor. The crankshaft transmits the power of the motor to the working components of the rotary compressor through rotational motion, thereby driving the gas compression process.

[0012] The cylinder block height H refers to the dimension of the cylinder block along its axial direction. The cylinder block height H not only affects the overall size of the rotary compressor but is also closely related to the energy transfer efficiency.

[0013] The thickness T of the permanent magnet and the thickness L of the rotor core directly affect the strength and stability of the motor magnetic field. An appropriate T*L can generate a strong enough magnetic field to drive the rotor to rotate and output a stable torque. And H*P is closely related to the motor speed, electromagnetic characteristics, and the overall size of the rotary compressor. Therefore, when T*L / (H*P) is in the range of 0.15 to 0.8, an optimized matching between the motor and the cylinder block can be achieved, reducing the losses in the energy transfer process, improving the conversion efficiency of the motor, and further ensuring the overall energy efficiency level of the rotary compressor. And on the premise of ensuring the performance of the rotary compressor, a smaller overall size can be achieved, improving the space utilization rate.

[0014] According to some embodiments of the present invention, 0.15 ≤ T*L / (H*P) ≤ 0.5.

[0015] According to some embodiments of the present invention, 0.15 ≤ T*L / (H*P) ≤ 0.28.

[0016] According to some embodiments of the present invention, the thickness L of the rotor core satisfies: 20 mm ≤ L ≤ 50 mm.

[0017] According to some embodiments of the present utility model, a plurality of cylinder blocks are configured, and each cylinder block is provided with a compression chamber. The height of any one of the cylinder blocks is H, and it satisfies: 0.19 ≤ T * L / (H * P) ≤ 0.71.

[0018] According to some embodiments of the present utility model, a plurality of cylinder blocks are configured, and each cylinder block is provided with a compression chamber. The heights of the plurality of cylinder blocks are H1, H2,... Hn, and it satisfies:

[0019] According to some embodiments of the present utility model, the thickness L of the rotor core satisfies: 35 mm ≤ L ≤ 80 mm.

[0020] According to some embodiments of the present utility model, the thickness T of the permanent magnet and the width W of the permanent magnet satisfy the relational expression: 0.08 ≤ T / W ≤ 0.23.

[0021] According to some embodiments of the present utility model, the thickness T of the permanent magnet satisfies: 1.0 mm ≤ T ≤ 3.0 mm.

[0022] According to some embodiments of the present utility model, the length of the permanent magnet in the axial direction is L0 and it satisfies: 0 mm ≤ L - L0 ≤ 3 mm.

[0023] According to some embodiments of the present utility model, a plurality of magnet slots are evenly distributed in a circumferential manner with the central axis of the rotor core as a reference. The magnetic poles of the permanent magnets in any two adjacent magnet slots are opposite, and the included angle between the adjacent two magnetic poles and the central axis of the rotor core is θ and it satisfies: 30° ≤ θ ≤ 36°.

[0024] According to some embodiments of the present utility model, the number of phases of the motor is m, and the number of slots per pole per phase of the motor is q, q = Q / mP, q < 1.

[0025] According to some embodiments of the present utility model, the magnet slots are configured such that the permanent magnets are distributed in a "one" shape or a "V" shape or a "U" shape on the rotor core, and the number of rotor poles P satisfies: 10 ≤ P ≤ 12.

[0026] The refrigeration device according to the present utility model will be briefly described below.

[0027] The refrigeration device according to the present utility model includes the rotary compressor described in any one of the above embodiments. Since the refrigeration device according to the present utility model includes the rotary compressor described in any one of the above embodiments, the refrigeration device according to the present utility model adopts a rotary compressor with a compact structure and a high energy efficiency level, not only significantly improving the refrigeration efficiency, but also realizing the miniaturization and light weight of the device, providing a more efficient and comfortable experience for users.

[0028] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0029] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 is a schematic structural diagram of a rotary compressor according to some embodiments of the present utility model;

[0031] Figure 2 is a schematic cross-sectional view of a motor of a rotary compressor according to some embodiments of the present utility model;

[0032] Figure 3 is a schematic end view of a rotor core of a motor of a rotary compressor according to some embodiments of the present utility model;

[0033] Figure 4 is a schematic structural diagram of a permanent magnet of a motor of a rotary compressor according to some embodiments of the present utility model;

[0034] Figure 5 is a schematic structural diagram of a cylinder block of a rotary compressor according to some embodiments of the present utility model;

[0035] Figure 6 is a schematic plan view of a cylinder block of a rotary compressor according to some embodiments of the present utility model;

[0036] Figure 7 is Figure 6 the schematic cross-sectional view A-A in;

[0037] Figure 8 is a curve showing the trend of energy efficiency differences of rotary compressors according to multiple different embodiments of the present utility model.

[0038] Reference Signs:

[0039] 1, Rotary Compressor;

[0040] 11, Motor, 111, Rotor Core, 112, Permanent Magnet, 113, Magnet Slot;

[0041] 12, Cylinder Block;

[0042] 13, Crankshaft. Detailed Embodiments

[0043] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0044] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0045] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances.

[0046] In the related art, during the miniaturization and weight reduction of a rotary compressor, the reduction of motor efficiency often occurs, and the reduction of motor efficiency will directly affect the overall energy efficiency level of the rotary compressor.

[0047] The following refers to Figures 1-8 Describe the rotary compressor 1 according to an embodiment of the present utility model.

[0048] As Figures 1-7As shown, the rotary compressor 1 according to the present utility model includes a motor 11 and a cylinder block 12. The motor 11 is provided with a rotor core 111 and permanent magnets 112. A plurality of magnet slots 113 are formed on the rotor core 111, and the thickness of the rotor core 111 is L. The permanent magnets 112 are received in the magnet slots 113, and the thickness of the permanent magnets 112 is T. The number of poles of the motor 11 is P. A compression cavity is formed in the cylinder block 12, and a crankshaft 13 connected to the motor 11 is arranged in the compression cavity. The height of the cylinder block 12 is H, and it satisfies: 0.15 ≤ T*L / (H*P) ≤ 0.8.

[0049] In the rotary compressor 1 according to the present utility model, the motor 11 and the cylinder block 12 cooperate together to achieve the compression and transportation of gas. A plurality of magnet slots 113 for receiving the permanent magnets 112 are formed on the rotor core 111. The permanent magnets 112 are used to generate the magnetic field of the motor 11 to drive the rotation of the rotor. The thickness L of the rotor core 111 refers to the dimension of the rotor core 111 along its axial direction. The thickness L of the rotor core 111 and the thickness T of the permanent magnets 112 jointly determine the configuration and intensity of the magnetic field inside the motor 11.

[0050] The number of poles P of the motor 11 is also an important factor affecting the performance of the motor 11. The selection of the number of poles needs to comprehensively consider the characteristics such as the rotational speed and torque output of the motor 11. By reasonably setting the number of poles P of the motor 11, the performance of the motor 11 is optimized.

[0051] The number of stator slots Q and the number of rotor poles P satisfy the relationship: 5 ≤ GCD(Q, P) ≤ 6 (Greatest Common Divisor). The stator slots are the spaces in the stator of the motor 11 for placing windings. The stator slots Q determine the structure and electrical performance of the windings of the motor 11. The number of rotor poles 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. An increase in the number of rotor poles P leads to a decrease in the rotational speed of the motor 11, thus affecting the performance of the motor.

[0052] 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, reduce its peak value, thereby reducing the vibration and noise of the motor 11 and improving the running stability of the rotary compressor 1. A reasonable pole-slot combination helps to improve the energy efficiency ratio of the motor 11 and further enhance the overall performance of the motor 11.

[0053] A compression cavity is formed in the cylinder block 12, and the compression cavity is used to accommodate gas and compress it. The crankshaft 13 is arranged 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 gas compression process.

[0054] The height H of the cylinder block 12 refers to the dimension of the cylinder block 12 along its axial direction. The height H of the cylinder block 12 not only affects the overall dimension of the rotary compressor 1, but is also closely related to the energy transfer efficiency.

[0055] 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. An appropriate T*L can generate a strong enough magnetic field to drive the rotor to rotate and output a stable torque. And H*P is closely related to the rotational speed and electromagnetic characteristics of the motor 11 and the overall dimension of the rotary compressor 1. Therefore, when T*L / (H*P) is in the range of 0.15 to 0.8, an optimized matching between the motor 11 and the cylinder block 12 can be achieved, the loss during the energy transfer process can be reduced, the conversion efficiency of the motor 11 can be improved, and thus the overall energy efficiency level of the rotary compressor 1 can be ensured. On the premise of ensuring the performance of the rotary compressor 1, a smaller overall dimension can be realized and the space utilization rate can be improved.

[0056] Therefore, for the rotary compressor 1 according to the present utility model, an optimized matching between the motor 11 and the cylinder block 12 is achieved, and the energy efficiency, space utilization rate and overall performance of the rotary compressor 1 are improved.

[0057] It should be noted that, as Figure 8 shown, in the analysis of the energy efficiency characteristics of the rotary compressor 1 shown in multiple embodiments of the present utility model, 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. As the ratio of T*L / (H*P) increases, the energy efficiency improvement rate gradually increases first, and after reaching a certain peak value, it then begins to gradually decrease. Further, when the ratio of T*L / (H*P) exceeds 0.8, the energy efficiency improvement rate not only continues to decrease until it approaches zero, but then turns negative.

[0058] According to some embodiments of the present utility model, 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 rotor to rotate, while reducing the loss during the energy transfer process, optimizing the overall dimension of the rotary compressor 1, and improving the space utilization rate, making the rotary compressor 1 more compact while maintaining high performance.

[0059] According to some embodiments of the present utility model, 0.15 ≤ T*L / (H*P) ≤ 0.28. 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. The motor 11 can generate an extremely stable and strong magnetic field, driving the rotor to rotate with extreme efficiency, thereby achieving minimal loss of energy during the transmission process. In addition, the overall size of the rotary compressor 1 has been further optimized, and the space utilization rate has reached a new height, enabling the rotary compressor 1 to still exhibit high performance within a compact volume.

[0060] According to some embodiments of the present utility model, as Figure 1 and Figure 2 shown, the thickness L of the rotor core 111 satisfies: 20 mm ≤ L ≤ 50 mm. The value of L can be any value greater than or equal to 20 millimeters and less than or equal to 50 millimeters. 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 within the range of 20 mm to 50 mm, 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 the overall energy efficiency. The rotor core 111 can not only meet the requirements of the rotary compressor 1 for torque and speed, but also maintain a high energy conversion efficiency, while avoiding unnecessary material waste and cost increase.

[0061] According to some embodiments of the present utility model, the cylinder block 12 is configured in multiple numbers, and a compression chamber is provided in each cylinder block 12. The multiple cylinder blocks 12 can compress gas simultaneously, improving the gas processing capacity of the rotary compressor 1, and achieving the continuity and high efficiency of the compression process. The multiple cylinder blocks 12 work simultaneously, which can effectively disperse the load of a single compression, reduce vibration and noise, and improve the operating stability of the rotary compressor 1.

[0062] The height of any one of the multiple cylinder blocks 12 is H, and it satisfies: 0.19 ≤ T*L / (H*P) ≤ 0.71, achieving a more refined matching and optimization between the motor 11 and the cylinder block 12. It can further reduce the overall size while maintaining the high performance of the rotary compressor 1, improve the space utilization rate, and meet the installation requirements in various compact spaces.

[0063] According to some embodiments of the present utility model, the cylinder block 12 is configured in multiple numbers, and a compression chamber is provided in each cylinder block 12. The multiple cylinder blocks 12 can compress gas simultaneously, improving the gas processing capacity of the rotary compressor 1, and achieving the continuity and high efficiency of the compression process. The multiple cylinder blocks 12 work simultaneously, which can effectively disperse the load of a single compression, reduce vibration and noise, and improve the operating stability of the rotary compressor 1.

[0064] The heights of multiple cylinder blocks 12 are H1, H2, …… Hn, and satisfy: H is the average height of multiple cylinder blocks 12, and satisfies 0.15 ≤ T * L / (H * P) ≤ 0.8, which not only considers the optimal configuration of the driving efficiency and magnetic field intensity of the motor 11, but also takes into account the compactness of the overall structure of the rotary compressor 1.

[0065] According to some embodiments of the present invention, the thickness L of the rotor core 111 satisfies: 35 mm ≤ L ≤ 80 mm. For the rotary compressor 1 with multiple cylinder blocks 12, by setting the thickness L of the rotor core 111 within the range of 35 mm to 80 mm, not only is it ensured that the motor 11 has sufficient structural strength to withstand the centrifugal force generated during high-speed rotation, but also the electromagnetic performance of the motor 11 is optimized, enabling it to maintain an efficient and stable operating state when driving the rotary compressor 1. The rotor core 111 can not only meet the requirements of the rotary compressor 1 for torque and speed, but also maintain a high energy conversion efficiency.

[0066] According to some embodiments of the present invention, such as Figure 3 and Figure 4 shown, the thickness T of the permanent magnet 112 and the width W of the permanent magnet 112 satisfy the relational expression: 0.08 ≤ T / W ≤ 0.23. The thickness T of the permanent magnet 112 directly affects the strength and stability of the magnetic field. A thicker permanent magnet 112 can generate a stronger magnetic field, but 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 characteristics of the motor 11, and determines the distribution and transmission path of the magnetic flux. By setting the ratio of T / W 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 realizing the compactification of the rotary compressor 1, and 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 better optimized, which helps to reduce energy loss and improve the conversion efficiency of the motor 11.

[0067] According to some embodiments of the present invention, the thickness T of the permanent magnet 112 satisfies: 1.0 mm ≤ T ≤ 3.0 mm. By restricting the thickness T of the permanent magnet 112 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 the efficient operation of the motor 11, and at the same time helps to reduce the overall volume of the motor 11, thereby realizing the compactification of the rotary compressor 1.

[0068] According to some embodiments of the present invention, such as Figure 4 shown, the axial length of the permanent magnet 112 is L0 and satisfies: 0 mm ≤ L - L0 ≤ 3 mm.

[0069] "0mm ≤ L - L0" means that the thickness L of the rotor core 111 is not less than the axial length L0 of the permanent magnet 112. Therefore, axially, the permanent magnet 112 is completely contained within 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 stable support and positioning of the permanent magnet 112 in the rotor core 111, and also helps to improve the overall structure and electromagnetic performance of the motor 11.

[0070] "L - L0 ≤ 3mm" gives 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 amount cannot exceed 3mm to control the overall size of the motor 11.

[0071] According to some embodiments of the present utility model, a plurality of magnet slots 113 are evenly distributed in a circle with the central axis of the rotor core 111 as the reference, which helps to achieve the uniformity and symmetry of the magnetic field of the motor 11. The magnetic poles of the permanent magnets 112 in any two adjacent magnet slots 113 are opposite, thus generating an alternating magnetic field. The alternating magnetic field interacts with the windings in the stator. When the current in the stator passes through, a rotating magnetic field will be 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 rotation of the rotor. For example, if the north pole of the permanent magnet 112 in a 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).

[0072] The interval angle between two adjacent magnetic poles and the central axis of the rotor core 111 is θ and satisfies: 30° ≤ θ ≤ 36°. A smaller interval angle θ (such as 30°) means a higher number of pole pairs, thus providing a higher torque density and a smoother torque output. A larger interval angle θ (such as 36°) reduces the number of pole pairs, simplifies the structure of the motor 11, and reduces the manufacturing difficulty and cost. By setting the interval 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 simplicity and economy of manufacturing are taken into account.

[0073] According to some embodiments of the present utility model, 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 change of the magnetic fields generated simultaneously during the operation of the motor 11. An increase in the number of phases m can improve the torque and power output of the motor 11, but at the same time, it will also increase the complexity and cost of the motor 11.

[0074] The number of slots per pole per phase of the motor 11 is q. The number of slots per pole per phase q refers to the number of consecutive slots occupied by each phase winding under each pole, which affects the electromagnetic performance and operating characteristics of the motor 11.

[0075] The number of phases m of the motor 11 and the number of slots per pole per phase q of the motor 11 satisfy: q = Q / mP, q < 1. Under the conditions of a given number of stator slots Q and the number of poles P of the motor 11, the average number of slots occupied by each phase winding under each pole q is less than 1 to achieve the best electromagnetic performance and operating efficiency.

[0076] According to some embodiments of the present invention, the magnet slots 113 are configured such that the permanent magnets 112 are arranged in a "one" shape or a "V" shape or a "U" shape on the rotor core 111, and the number of rotor poles P satisfies: 10 ≤ P ≤ 12.

[0077] The "one" shape arrangement means that the permanent magnets 112 are placed in the straight slots of the rotor core 111 to form a linear arrangement. The distribution method is simple and direct, and is suitable for scenarios where a higher torque density and lower manufacturing cost are required. The "V" shape arrangement means that the permanent magnets 112 are placed on the rotor core 111 in a certain way (such as being inclined or at a specific angle) to form a shape similar to the letter "V", which helps to improve the magnetic field distribution of the motor 11, reduce magnetic leakage, and improve the efficiency and performance of the motor 11. The "U" shape arrangement means that the permanent magnets 112 are placed on the rotor core 111 in a certain way to form a shape similar to the letter "U", which can also have a positive impact on the magnetic field distribution and performance of the motor 11.

[0078] By setting the number of rotor poles P in 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 working environment of the rotary compressor 1 to cope with the load changes during the compression process. In addition, the reasonable number of poles 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.

[0079] In summary, the rotary compressor 1 according to the embodiment of the present invention includes a motor 11 and a cylinder block 12. By optimizing T*L / (H*P) to be between 0.15 and 0.8, the energy efficiency, space utilization rate, and overall performance are improved. 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. 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, 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 in the range of 20 mm to 50 mm, it helps to optimize the magnetic field distribution inside the motor 11, and the motor 11 can convert electrical energy into mechanical energy more effectively, improving the overall energy efficiency. By constructing the cylinder block 12 into multiple ones, the multiple cylinder blocks 12 can compress gas simultaneously, improving the gas processing capacity of the rotary compressor 1, and realizing the continuity and high efficiency of the compression process. The height of any one of the multiple cylinder blocks 12 is H, and it satisfies: 0.19 ≤ T*L / (H*P) ≤ 0.71, realizing a more refined matching and optimization between the motor 11 and the cylinder block 12. It can further reduce the overall size while maintaining the high performance of the rotary compressor 1, improve the space utilization rate, and meet the installation requirements in various compact spaces. The heights of the multiple cylinder blocks 12 are H1, H2,... Hn, and it satisfies: H is the average height of multiple cylinder blocks 12, and satisfies 0.15 ≤ T*L / (H*P) ≤ 0.8, which not only considers the optimal configuration of the driving efficiency and magnetic field intensity 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 35 mm to 80 mm, it not only ensures that the motor 11 has sufficient structural strength to withstand the centrifugal force generated during high-speed rotation, but also optimizes the electromagnetic performance of the motor 11, enabling it to maintain an efficient and stable operating state when driving the rotary compressor 1. By setting the ratio of T / W 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 realizing the compactification of the rotary compressor 1. Moreover, 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 restricting the thickness T of the permanent magnet 112 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 the efficient operation of the motor 11, while also helping to reduce the overall volume of the motor 11, thereby realizing the compactification 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, it can ensure the stable support and positioning of the permanent magnet 112 in the rotor core 111, and at the same time, it also helps to improve the overall structure and electromagnetic performance of the motor 11; on the other hand, it can control the overall size of the motor 11.

[0080] The refrigeration device according to the present invention will be briefly described below.

[0081] The refrigeration device according to the present invention includes the rotary compressor 1 in any one of the above embodiments. Since the refrigeration device according to the present invention includes the rotary compressor 1 in any one of the above embodiments, the refrigeration device according to the present invention not only significantly improves the refrigeration efficiency by adopting a rotary compressor 1 with a compact structure and high energy efficiency level, but also realizes the miniaturization and light weight of the device, providing a more efficient and comfortable experience for users.

[0082] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0083] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A rotary compressor, characterized in that: include: A motor (11), the motor (11) being provided with a rotor core (111) and a permanent magnet (112), the rotor core (111) being formed with a plurality of magnet slots (113) and having a thickness of L, the permanent magnet (112) being accommodated in the magnet slot (113) and having a thickness of T, and the number of rotor poles of the motor (11) being P; 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; A cylinder body (12), wherein a compression chamber is formed in the cylinder body (12), wherein a crankshaft (13) connected to the motor (11) is arranged in the compression chamber, and the height of the cylinder body (12) is H; and the following condition is satisfied: 0.15≤T*L / (H*P)≤0.

8.

2. The rotary compressor according to claim 1, characterized in that: 0.15≤T*L / (H*P)≤0.

5.

3. The rotary compressor according to claim 2, characterized in that: 0.15≤T*L / (H*P)≤0.

28.

4. The rotary compressor according to any one of claims 1 to 3, characterized in that: The thickness L of the rotor core (111) satisfies: 20 mm ≤ L ≤ 50 mm.

5. The rotary compressor according to claim 1, characterized in that: The cylinder bodies (12) are constructed in multiple numbers, each of which is provided with a compression chamber, wherein the height of any one of the cylinder bodies (12) is H, and satisfies: 0.19≤T*L / (H*P)≤0.

71.

6. The rotary compressor according to claim 1, characterized in that: The cylinder bodies (12) are structured in a plurality, each of the cylinder bodies (12) is provided with a compression chamber, the heights of the plurality of cylinder bodies (12) are H1, H2, ... Hn, and satisfy the following conditions:

7. The rotary compressor according to claim 5 or 6, characterized in that: The thickness L of the rotor core (111) satisfies: 35 mm ≤ L ≤ 80 mm.

8. The rotary compressor according to claim 1, characterized in that: 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.

9. The rotary compressor according to claim 8, characterized in that: The thickness T of the permanent magnet (112) satisfies: 1.0 mm≤T≤3.0 mm.

10. The rotary compressor according to claim 1, characterized in that The permanent magnet (112) has an axial length of L0 and satisfies: 0mm≤L-L0≤3mm.

11. The rotary compressor according to claim 1, characterized in that: The plurality of magnet slots (113) are evenly distributed in a circumference with the central axis of the rotor core (111) as a reference, the magnetic poles of the permanent magnets (112) in any two adjacent magnet slots (113) are opposite, and the interval angle between the two adjacent magnetic poles and the central axis of the rotor core (111) is θ and satisfies: 30°≤θ≤36°.

12. The rotary compressor according to claim 11, characterized in that The number of phases of the motor (11) is m, the number of slots per pole per phase of the motor (11) is q, q=Q / mP, q<1.

13. The rotary compressor according to claim 11, characterized in that The magnet slots (113) are structured such that the permanent magnets (112) are distributed in a straight line, a V, or a U on the rotor core (111), and the number of rotor poles P satisfies: 10≤P≤12.

14. A refrigeration device, characterized in that: A rotary compressor comprising any one of claims 1-13.

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