Compressor and refrigeration equipment

Abstract

The invention discloses a compressor and refrigeration equipment, and relates to the technical field of compressors, and the compressor comprises a motor and an air cylinder; the motor comprises a stator core and a winding, the winding is arranged on the stator core, the maximum outer diameter of the stator core is D1, the axial length of the stator core along the compressor is L, the air cylinder and the stator core are distributed along the axial direction, the height of the air cylinder in the axial direction is H, the inner diameter of the air cylinder is D2, and the following conditions are met: U is the maximum voltage of the compressor, the unit is V, B is the gauge pressure of the compressor, the unit is MPa, and D is the maximum voltage of the compressor. And the unit of D1, L, D2 and H is mm. According to the technical scheme, the magnetic load capacity of the stator core is matched with the mechanical load of the compressor, material waste is avoided, and the energy efficiency of the compressor is guaranteed.

Description

Technical Field

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

[0002] In the prior art, compressor energy efficiency is influenced by the motor and cylinder. When assembling a compressor, the motor is often selected based on experience or power requirements. However, this design approach can easily lead to the stator core's magnetic flux density failing to meet the requirements of a high-power compressor. Furthermore, blindly increasing the stator core size can lead to material waste. This results in a mismatch between the magnetic load of the motor's stator core and the load of the cylinder, impacting the compressor's energy efficiency. Summary of the Invention

[0003] The main purpose of the present invention is to provide a compressor and a refrigeration device, aiming to match the magnetic load capacity of the stator core with the mechanical load of the compressor, avoid material waste, and ensure the energy efficiency of the compressor.

[0004] To achieve the above-mentioned object, the compressor proposed by the present invention comprises: a motor, the motor comprising a stator core and a winding, the winding being provided on the stator core, the maximum outer diameter of the stator core being D1, and the axial length of the stator core being L along the compressor; and A cylinder, wherein the cylinder and the stator core are distributed along the axial direction, the height of the cylinder in the axial direction is H, and the inner diameter of the cylinder is D2; satisfy: , where U is the maximum voltage of the compressor, in V, B is the gauge pressure of the compressor, in MPa, and the units of D1, L, D2, and H are in mm.

[0005] In one embodiment, the motor is configured as a single-phase motor, the number of turns of the motor is N, the winding includes a main winding and a secondary winding, the wire diameter of the main winding is D3, the wire diameter of the secondary winding is D4, and the wire diameter of the main winding satisfies: , the wire diameter of the secondary winding satisfies: , where the units of D3 and D4 are mm.

[0006] In one embodiment, the motor is configured as a three-phase motor, the number of turns of the motor is N, the wire diameter of the winding is D5, and the following conditions are satisfied: , the unit of D5 is mm.

[0007] In one embodiment, the wire diameter of the winding ranges from 0.8 mm to 2.0 mm, the conducting wire of the winding is configured as an enameled wire, and the coating thickness of the enameled wire ranges from 0.08 mm to 0.12 mm.

[0008] In one embodiment, the compressor further includes an overload protector, the locked-rotor current of the compressor is I1, and the operating current of the overload protector is I2, satisfying: , where the unit of I1 and I2 is A.

[0009] In one embodiment, the distance between the overload protector and the winding is no more than 10 mm.

[0010] In one embodiment, a plurality of stator teeth are evenly distributed on the inner circumference of the stator core, a stator slot is formed between two adjacent stator teeth, the number of stator slots of the stator core is 12n, n is a positive integer, and the slot areas and shapes of the plurality of stator slots are uniform.

[0011] In one embodiment, the width of the stator slot along the circumferential direction is W, which satisfies: .

[0012] In one embodiment, the radial depth of the stator slot is T1, and the radial width of the stator core is T2, satisfying: , the unit of T1 and T2 is mm.

[0013] In one embodiment, the maximum outer diameter D1 of the stator core further satisfies: , the axial length L of the stator core along the compressor also satisfies: .

[0014] In one embodiment, the axial height H of the cylinder and the inner diameter D2 of the cylinder further satisfy: .

[0015] In one embodiment, the material of the wire of the winding is at least aluminum.

[0016] In one embodiment, the motor further includes a rotor rotatably mounted on the inner circumference of the stator core, the cross-sectional area of ​​the rotor bars is S1, the cross-sectional area of ​​the winding wires is S2, and the following conditions are satisfied: , where S1 and S2 are in mm 2 .

[0017] The present invention also provides a refrigeration device, which includes the compressor as described above.

[0018] The technical solution of the present invention is limited Ensure that the stator core has sufficient magnetic circuit cross-sectional area and magnetic flux carrying capacity, and is compatible with the maximum mechanical load capacity of the compressor, so that the motor power of the compressor and the stiffness of the pump body are compatible, with better energy efficiency. 2If ×L is too small, the stator core is prone to magnetic saturation, resulting in a sharp increase in excitation current, increased copper loss and iron loss, low motor efficiency, and excessive temperature rise. In severe cases, it may cause the winding to burn out. It is achieved that under the maximum load condition, the stator core can provide sufficient magnetic flux density to meet the demand for electromagnetic output of high-power operation and ensure the stable and reliable operation of the compressor under high load conditions. It can be used to prevent excessive redundancy in the stator core size. If D1 or L is too large, the magnetic load capacity can be improved, but it will lead to an increase in motor volume, increased material usage, and increased costs. At the same time, it will increase unnecessary core weight and eddy current loss, reducing material utilization and overall energy efficiency. Therefore, by adjusting D1 2 ×L sets the upper limit value, which effectively constrains the size of the stator core and achieves a higher material utilization rate under the premise of meeting performance requirements. In this way, by limiting the magnetic load capacity parameter D1 of the stator core, 2 The matching relationship between ×L and the cylinder height H, cylinder diameter D2, gauge pressure B and maximum voltage U makes the stator core magnetic load match the mechanical load of the compressor, ensuring power output and reducing the probability of material waste, so that the output capacity of the motor matches the load requirement of the compressor and ensures the energy efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 A cross-sectional view of an embodiment of a compressor provided by the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the stator core; Figure 3 for Figure 2 Cross-sectional view of section AA of the stator core; Figure 4 for Figure 1 Schematic diagram of the structure of the middle cylinder; Figure 5 for Figure 4 Cross-sectional view of the BB section of the middle cylinder; Figure 6 for Figure 1 Cross-sectional view of the motor; Figure 7 The compressor provided by the present invention has the following characteristics: pump body rigidity, motor efficiency and D1 at 3kW. 2A relationship diagram of the motor efficiency, manufacturing cost, and wire diameter of the winding of the compressor provided by the present application; Figure 8 A relationship diagram of the motor efficiency, manufacturing cost, and wire diameter of the winding of the compressor provided by the present application; Figure 9 A relationship diagram of the locked-rotor temperature rise, locked-rotor durability, and locked-rotor current of the compressor provided by the present application when the operating current is 60 A.

[0021] Explanation of reference numerals: 100, motor; 110, stator core; 111, stator slot; 112, stator tooth; 120, rotor; 130, winding; 140, overload protector; 200, cylinder.

[0022] The implementation, functional features, and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0024] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0025] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel solutions are included, for example, “A and / or B” includes A solution, or B solution, or A and B solutions are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0026] The present application provides a compressor.

[0027] Please refer to Figures 1 to 5 、 Figure 7 In one embodiment of the present invention, the compressor comprises: The motor 100 includes a stator core 110 and a winding 130 . The winding 130 is disposed on the stator core 110 . The maximum outer diameter of the stator core 110 is D1 , and the axial length of the stator core 110 along the compressor is L. The cylinder 200 and the stator core 110 are distributed along the axial direction. The height of the cylinder 200 in the axial direction is H, and the inner diameter of the cylinder 200 is D2. satisfy: , where U is the maximum voltage of the compressor in V, B is the gauge pressure of the compressor in MPa, and the units of D1, L, D2, and H are mm.

[0028] The technical solution of the present invention is limited Ensure that the stator core 110 has sufficient magnetic circuit cross-sectional area and magnetic flux carrying capacity, and is compatible with the maximum mechanical load capacity of the compressor, so that the motor power of the compressor and the stiffness of the pump body are compatible, and have better energy efficiency. 2 If ×L is too small, the stator core 110 is prone to magnetic saturation, resulting in a sharp increase in excitation current, increased copper loss and iron loss, reduced efficiency of the motor 100, and excessive temperature rise. In severe cases, the winding 130 may burn out. It is achieved that under the maximum load condition, the stator core 110 can provide sufficient magnetic flux density to meet the demand for electromagnetic output of high-power operation and ensure the stable and reliable operation of the compressor under high load conditions. It can be used to prevent excessive redundancy in the size of the stator core 110. If D1 or L is too large, the magnetic load capacity can be improved, but it will lead to an increase in the volume of the motor 100, an increase in material consumption, and an increase in cost. At the same time, it will increase unnecessary core weight and eddy current loss, reducing material utilization and overall energy efficiency. 2 ×L sets the upper limit value, which effectively constrains the size of the stator core 110 and achieves a higher material utilization rate under the premise of meeting performance requirements. In this way, by limiting the magnetic load capacity parameter D1 of the stator core 110, 2 The matching relationship between ×L and the cylinder height H, cylinder diameter D2, gauge pressure B and maximum voltage U of the cylinder 200 makes the magnetic load of the stator core 110 match the mechanical load of the compressor, ensuring power output and reducing the probability of material waste, so that the output capacity of the motor 100 matches the load requirement of the compressor, ensuring the energy efficiency of the compressor.

[0029] It should be noted that for compressors with different power requirements, the cylinder height H and cylinder diameter D2 of the cylinder 200 are matched, and the maximum voltage U and gauge pressure B are also linearly related to the power of the compressor. 2The larger and smaller values ​​of ×L are limited by different coefficients with D2×H×B×U, reflecting D1 2 The value range of ×L can correspond to the mechanical load of compressors of different powers, thereby ensuring that the magnetic load capacity of the stator core 110 is adapted to the pump body stiffness of compressors of different powers. Among them, the coefficient range of 4.3 to 5.4 is the interval obtained through a large amount of experimental data and simulation analysis. By performing multi-objective optimization on compressors with different displacements, different maximum voltages, and different pressures, and comprehensively considering factors such as electromagnetic performance, temperature rise, efficiency, and material cost, when D1 2 When ×L is within the above range, the compressor achieves optimal matching between motor 100 power and compression load across the entire operating range, improving material utilization by over 15%, increasing overall unit energy efficiency by an average of 6%-12%, and keeping temperature rise within a safe range. The maximum voltage U represents the maximum safe voltage at which the compressor motor can safely operate. The gauge pressure B represents the rated pressure of the compressor, the actual pressure value measured during non-operation. For compressors with motor 100 rated power between 3kW and 10kW, the gauge pressure U of the compressor is between 4.0MPa and 5.0MPa. The maximum outer diameter D1 of the stator core 110 is understood to be: the stator core 110 is fixed to the inner circumference of the compressor casing, and D1 is equal to the inner diameter of the compressor casing. The axial length L of the stator core 110 is understood to be: the average length of the stator core 110 in the axial direction of the compressor. The cylinder 200 is a regular component, and its inner diameter D2 and cylinder height H can be directly measured and thus can be understood as average values.

[0030] like Figure 7 As shown, the compressor power is 3kW for reference. According to the limitation of the above formula, it can be seen that 4.3×D2×H×B×U corresponds to D1 2 The value of ×L is 1650cm 3 , 5.4×D2×H×B×U corresponds to D1 2 The value of ×L is 1900cm 3 , then assume the inner diameter of the compressor casing, that is, assume the value of D1, and then calculate the minimum L value according to the limitation of the above formula. By adjusting the values ​​of D1 and L, the size of the stator core 110 is adapted to the high power load, such as Figure 7 Middle D1 2 ×L value is 1650cm 3 to 1900cm 3 The rigidity of the compressor pump body, corresponding to the mechanical load capacity of the compressor, is in the relatively high range of 1.6Mpa to 1.9Mpa, and the efficiency of the motor 100 is between 78% and 82%, and shows a trend of gradual improvement. Specifically, D1 2 × L is 1800cm 3 When the compressor pump body stiffness is 1.9Mpa, the compressor motor 100% efficiency is 81%.

[0031] Regarding the relationship between the wire diameter of the winding 130 and the power of the compressor, in one embodiment, please refer to Figure 1 、 Figure 4 and Figure 5 、 Figure 8 The motor 100 is configured as a single-phase motor 100. The number of turns of the motor 100 is N. The winding 130 includes a main winding and a secondary winding. The wire diameter of the main winding is D3, and the wire diameter of the secondary winding is D4. The wire diameter of the main winding satisfies: , the wire diameter of the secondary winding satisfies: , where D3 and D4 are in mm. It can be understood that by limiting the matching relationship between the main winding and auxiliary winding wire diameters and the cylinder diameter D2 and cylinder height H of the cylinder 200, the operating voltage U and the number of turns N, the coordinated optimization of the electromagnetic performance of the winding 130 and the compressor load requirements is achieved: the main winding meets , the secondary winding satisfies , where D3 2 / (4πN) and D4 2 / (4πN) represents the equivalent conductor cross-sectional area of ​​the main winding and the auxiliary winding under unit number of turns, that is, the product of the cross-sectional area of ​​the winding wire diameter 130 and the safe current density. This ensures that under different voltage and load conditions, the main winding has sufficient current carrying capacity to output the rated torque to avoid overheating or insufficient output. At the same time, the auxiliary winding provides the appropriate phase difference current during the starting phase to ensure reliable starting torque. At the same time, taking the wire diameter limit of the main winding as an example, and By characterizing the different mechanical load factors of the compressor, the upper and lower limits of the wire diameters of the main winding and the auxiliary winding are clearly set corresponding to the current density and the load factor of the compressor, effectively balancing the copper loss, filling rate and winding cost, and preventing the wire diameter from being too thin, resulting in excessive resistance and severe heat, or too thick, resulting in excessive slot fill rate and difficulty in inserting the wire. This ensures the efficient and stable operation of the single-phase motor 100 while improving the material utilization rate of the winding 130 and the overall energy efficiency level of the compressor.

[0032] In another embodiment, for the three-phase motor 100, Figure 1 、 Figure 4 and Figure 5 、 Figure 8 , the number of turns of the motor 100 is N, the wire diameter of the winding 130 is D5, and the following conditions are met: , the unit of D5 is mm. It can be understood that the motor 100 winding 130 is composed of three-phase symmetrical windings 130, each phase winding 130 has N turns, and the winding 130 wire diameter is D5, which satisfies the relationship: , where D5 2 / (4πN) represents the equivalent cross-sectional area of ​​the conductor of winding 130 per unit number of turns, which is the product of the cross-sectional area of ​​the winding 130 wire diameter and the safe current density. By coupling and optimizing the wire diameter with the cylinder diameter D2 and cylinder height H of cylinder 200, the operating voltage U, and the number of turns N, the current density of winding 130 is matched to the load requirements of the compressor at maximum voltage U and rated pressure B. The lower limit of the compressor load factor ensures that the wire of winding 130 has sufficient cross-sectional area to carry the operating current under high-load conditions, preventing excessive resistance, increased copper losses, and excessive temperature rise caused by undersized wire diameter, thereby ensuring the continuous operation reliability of motor 100. The upper limit of the compressor load factor prevents excessive slot fill rate, difficulty in winding 130 installation, and material waste caused by oversized wire diameter, while also reducing unnecessary motor 100 volume. This ensures efficient and stable output of the three-phase motor 100 while improving the material utilization of winding 130 and the overall performance of the compressor.

[0033] Taking the main winding of the three-phase motor 100 as an example, according to the formula Given the limitation of the compressor cylinder diameter D2 is 60mm, cylinder height H is 28mm, and voltage U is 253V, we can find the minimum value of D3 by substituting it into the formula. Figure 8 As shown, when D3 is 1 mm, the efficiency of the motor 100 of the compressor is 77%, when D3 is 1.1 mm, the efficiency of the motor 100 of the compressor is 81%, and when D3 is 1.2 mm, the efficiency of the motor 100 of the compressor is 82%. In addition, due to the different specifications of the compressor, the specific manufacturing costs are also different. Figure 8 The vertical axis in the figure does not indicate specific manufacturing cost values. However, for compressors of the same specifications, the manufacturing cost of the compressor increases linearly with the wire diameter of the winding 130. This indicates that by balancing the wire diameter of the winding 130, the efficiency of the compressor motor 100, and the high load requirements of the compressor, and also considering the relationship between wire diameter and manufacturing cost, and then determining the winding 130 wire diameter that adapts to the power requirements, the compressor manufacturing cost can also be reduced. D3, D4, and D5 are any measured values ​​of the winding 130 in their respective situations.

[0034] In one embodiment, please refer to Figure 1 and Figure 6The wire diameter of the winding 130 ranges from 0.8 mm to 2.0 mm. The wire of the winding 130 is configured as an enameled wire, and the thickness of the enameled wire is between 0.08 mm and 0.12 mm. It can be understood that, under the premise of ensuring the electrical insulation reliability of the motor 100, the matching relationship between the slot fill rate and the conductor cross-sectional area is optimized: the lower limit of the wire diameter is 0.8mm, which avoids the problems of excessive resistance, severe heat generation and insufficient mechanical strength caused by too thin wires, and ensures the current carrying capacity and durability under high-load conditions; the upper limit of 2.0mm prevents the winding difficulties, cost waste and reduced space utilization of the stator slot 111 caused by too thick wire diameter; at the same time, the paint thickness is controlled in the range of 0.08 to 0.12mm, which not only meets the withstand voltage requirements of the inter-turn insulation and prevents short-circuit breakdown, but also minimizes the space occupied by the non-conductive part, improves the filling efficiency and heat dissipation performance of the winding 130, such as the temperature resistance grade is F (greater than or equal to 155°C), thereby effectively improving the material utilization, electromagnetic performance and overall reliability on the basis of ensuring the insulation safety and process feasibility of the motor 100.

[0035] For the overload protection of the compressor, in this embodiment, please refer to Figure 1 、 Figure 6 and Figure 9 The compressor also includes an overload protector 140. The locked-rotor current of the compressor is I1, and the operating current of the overload protector 140 is I2, which satisfies: , where the unit of I1 and I2 is A. It can be understood that the overload protector 140 is used to cut off the circuit in time when abnormal current or temperature rise occurs in the motor 100, to prevent the winding 130 from burning or the equipment from being damaged. The stall current of the compressor is I1, that is, the maximum current generated when the rotor 120 of the motor 100 is completely blocked under the rated voltage, which reflects the electrical stress level of the compressor under extreme fault conditions; the action current of the overload protector 140 is I2, that is, the critical current value of the overload protector 140 that triggers tripping and disconnecting the circuit under continuous power-on conditions, which is the rated value. This embodiment satisfies the relationship between the two by limiting: , achieving a precise match between the protection device and the electrical characteristics of the compressor body, effectively solving the technical problem in the traditional design where the overload protector 140 is too sensitive, causing misoperation or response hysteresis, leading to protection failure. Specifically, when When the motor 100 is under the short-circuit current for a long time, it is ensured that after the stall fault occurs, the fault current is sufficient to overcome the action threshold of the overload protector 140 and reliably trigger the protection action within a reasonable time, so as to avoid the insulation degradation or fire risk caused by the motor 100 being unable to drive the overload protector 140 to respond due to I1 being too small. , which limits the upper limit of the locked-rotor current, preventing I1 from being too large, causing the overload protector 140 to operate but undergo excessive thermal shock and electrodynamic stress, shortening its service life, or even causing contact welding or structural damage before operation, thereby ensuring the durability of the overload protector 140.

[0036] Among them, such as Figure 9 As shown, taking an operating current I2 of 60A for overload protector 140, the corresponding I1 ranges from 78A to 90A, resulting in a temperature rise of less than 134°C and a stalled-rotor durability of 520 hours for motor 100. For example, if I1 is 80A, the stalled-rotor temperature rise is 127°C, resulting in a stalled-rotor durability of 498 hours, meeting the qualified standard of less than or equal to 140°C, and a stalled-rotor durability of 461 hours for motor 100. This ensures that overload protector 140 reliably responds within 5 seconds, reduces the stalled-rotor temperature rise by 20% to 30%, lowers the risk of winding 130 burning, and achieves nearly 100% operating accuracy, increasing the compressor's mean time between failures to over 50,000 hours.

[0037] Further, in this embodiment, please refer to Figure 1 and Figure 6 , the distance between the overload protector 140 and the winding 130 is not more than 10mm. It can be understood that since the overload protector 140 usually realizes its protection function by sensing the temperature or current thermal effect in the winding 130 area, when the distance between it and the winding 130 is too far, there is an obvious heat conduction delay, causing the protector to sense the temperature lag behind the actual temperature rise of the winding 130. It may still fail to act in time when the motor 100 is overheated or a fault such as a turn-to-turn short circuit occurs, posing a safety hazard; and controlling the distance within 10mm can ensure that the overload protector 140 is fully within the influence range of the thermal field of the winding 130, realize rapid thermal coupling, and enable it to reflect the heating state of the winding 130 more realistically and in real time, and quickly respond and cut off the circuit when abnormal working conditions such as overload, stall or poor heat dissipation occur, effectively preventing insulation aging, enameled wire burning or even fire accidents, thereby improving the response sensitivity and detection accuracy of the overload protector 140 to the temperature change of the winding 130 of the motor 100. At the same time, it also reduces the thermal resistance in the signal transmission path, improves the reliability and repeatability of the protection action, and can maintain stable protection characteristics, especially under frequent start-stop or variable operating conditions, thereby significantly improving the overall safety performance of the compressor and the stability of long-term operation.

[0038] Regarding the structure of the stator slot 111 of the stator tooth 112, in one embodiment, please refer to Figure 2A plurality of stator teeth 112 are evenly distributed on the inner circumference of the stator core 110 , and a stator slot 111 is formed between two adjacent stator teeth 112 . The number of stator slots 111 of the stator core 110 is 12n, where n is a positive integer, and the slot areas and shapes of the plurality of stator slots 111 are uniform. This embodiment describes the winding 130 using aluminum wire. As will be appreciated, aluminum wire, compared to copper wire, has higher resistivity, lower mechanical strength, poorer ductility, and more demanding connection processes. It is more susceptible to breakage, crushing, or poor contact during the winding and inserting process. Therefore, stricter requirements are placed on slot consistency and the symmetry of the winding 130 distribution. By adopting a slot configuration of 12n, a good match with a common pole-count motor 100 is achieved, effectively suppressing cogging torque and electromagnetic vibration, improving operational smoothness. This also ensures highly symmetrical spatial distribution of the three-phase winding 130 and balanced current load, avoiding the risk of excessive local current density due to slot shape deviation or uneven distribution, which could exacerbate heating and oxidation of the aluminum wire. Furthermore, the uniform design of the area and shape of all stator slots 111 facilitates the implementation of the automatic aluminum wire inserting process, reducing inserting resistance and winding breakage rate, improving slot fill rate and production yield, and ensuring consistent heat dissipation within each slot to prevent the generation of local hot spots. Thus, on the basis of ensuring high reliability and low-loss operation of the aluminum wire winding 130 motor 100, its advantages of lightweight and low cost are fully utilized. For example, compared with the copper wire motor 100, the cost is reduced by 35% to 45%, and the uniform slot design improves production efficiency by 10% to 15%. It also solves the technical problem that the performance degradation and insufficient durability of aluminum wire in the application of the motor 100 are easily caused by structural unevenness.

[0039] Further, in this embodiment, please refer to Figure 2 , the width of the stator slot 111 along the circumferential direction is W, which satisfies: It is understandable that, since aluminum wire is softer, more ductile, has lower tensile strength, and has poor conductivity of the surface oxide layer compared to copper wire, if the slot width is too small, such as less than 2.3 mm, during the installation of the winding 130, the friction resistance and extrusion stress of the aluminum wire will be significantly increased when it passes through the slot, which can easily cause scratches on the wire, damage to the paint film, or bending deformation, thereby causing faults such as inter-turn short circuits or poor contact. At the same time, it is not conducive to the precise operation of automated wire-insertion equipment, reducing production efficiency and yield. If the slot is too wide, such as exceeding 3.5 mm, it will weaken the mechanical strength of the root of the stator tooth 112, affect the overall structural stability of the iron core, increase the tooth torque pulsation, and lead to increased vibration and noise during the operation of the motor 100. It may also cause uneven distribution of air gap flux density and reduce electromagnetic efficiency. This embodiment increases winding space utilization by controlling W within the range of 2.3 mm to 3.5 mm. This ensures smooth aluminum wire insertion and reduces damage risk while maintaining good magnetic circuit structural symmetry and air gap magnetic field uniformity. This not only improves the assembly process reliability and insulation life of winding 130 , but also increases the heat dissipation area of ​​stator core 110 . This makes it suitable for aluminum wire motor 100 compressor applications requiring high power density and high reliability, achieving a synergistic improvement in performance, durability, and manufacturing feasibility. Where W is an arbitrary measured value.

[0040] Regarding the relationship between the teeth and the yoke of the stator core 110, in one embodiment, please refer to Figure 2 , the radial depth of the stator slot 111 is T1, and the radial width of the stator core 110 is T2, satisfying: , T1 and T2 are in mm. It is understood that when T1 / T2 is less than 60%, the depth of the stator slot 111 is relatively shallow, limiting the space for the conductors of the winding 130 and reducing the slot fill rate. This not only affects the output capacity of the motor 100, but also increases the resistance of the winding 130 due to the insufficient cross-sectional area of ​​the copper or aluminum wire, resulting in increased losses and temperature rise, affecting efficiency and reliability. When T1 / T2 exceeds 75%, the excessive slot depth significantly reduces the magnetic circuit cross-sectional area at the root and yoke of the stator teeth 112, easily causing local magnetic saturation of the core, increasing iron loss and reducing the magnetic flux carrying capacity. This also reduces the overall mechanical stiffness of the stator core 110, affecting the stability of the stator core 110's laminated structure, and is particularly prone to generating noise and loosening under high-frequency vibration conditions of the compressor. In this way, by controlling T1 / T2 within the range of 60% to 75%, sufficient slot space is ensured to accommodate the winding 130 with the required number of turns and wire diameter, thereby improving electromagnetic design freedom and power density. A sufficient yoke cross-section is also retained to ensure smooth flow of magnetic flux, reducing magnetic resistance and saturation risks. This, in turn, maintains good structural strength and a heat dissipation path, facilitating rapid heat transfer from the winding 130 through the slot wall to the core body, improving thermal stability. This ensures high efficiency and high torque output of the motor 100 while enhancing the reliability and durability of the compressor during long-term operation. The radial width T2 of the stator core 110 is an arbitrary measured value, and the radial slot depth T1 of the stator slot 111 is an arbitrary measured value.

[0041] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 6 , the maximum outer diameter D1 of the stator core 110 also satisfies: , the axial length L of the stator core 110 along the compressor also satisfies: It should be noted that when D1 is less than 130mm or L is less than 80mm, the volume of the stator core 110 is too small, the cross-sectional area of ​​the magnetic circuit and the space for accommodating the winding 130 are limited, making it difficult to meet the magnetic flux density and number of turns of the winding 130 required for high power output, which can easily lead to magnetic saturation, insufficient output and excessive temperature rise, especially under high compression ratio and high system load conditions, where performance degrades significantly. If D1 exceeds 300mm or L exceeds 200mm, the core size is too large, which not only increases material costs and the weight of the motor 100, but also causes the overall volume of the compressor to expand, affecting installation adaptability in limited equipment space. It may also introduce additional iron loss due to the excessively long magnetic circuit, reducing energy efficiency, and at the same time, puts higher requirements on manufacturing processes such as stamping, lamination, winding and assembly, affecting production efficiency and consistency. By limiting D1 and L to the ranges of 130-300 mm and 80-200 mm, respectively, the stator core 110 ensures sufficient electromagnetic capacitance to support high-displacement, high-pressure compression loads. This improves the power density and operating efficiency of the motor 100 while also reducing material waste. For example, for high-volume compressors with a single-cylinder displacement greater than or equal to 30 cc / rev, the material waste rate is reduced to less than 5%.

[0042] Regarding the size of the cylinder 200, in one embodiment, please refer to Figure 1 、 Figure 4 and Figure 5 , the axial height H of the cylinder 200 and the inner diameter D2 of the cylinder 200 also satisfy: It should be noted that when the product of D2×H is too small, the volume of the cylinder 200 is limited, resulting in insufficient single-stroke displacement, making it difficult to meet the gas compression requirements under high cooling capacity conditions. It is necessary to increase the speed to compensate, which in turn causes problems such as increased vibration, noise, and increased mechanical wear. By setting This ensures that cylinder 200 has sufficient compression chamber volume, enabling large-displacement gas delivery without significantly increasing the rotational speed, which is beneficial for improving volumetric efficiency and system energy efficiency. For example, this corresponds to compressors with a displacement greater than or equal to 30cc / rev. At the same time, this size range takes into account both the structural strength and thermal stability of cylinder 200. Larger D2 and H help disperse the lateral force and thermal load during the piston's reciprocating motion, reducing the risk of local stress concentration and thermal deformation, and improving the performance and service life of the sliding seal. In applications using high-gauge-pressure refrigerants (such as R32 and R410A), the load intensity per unit displacement can be effectively reduced. Combined with the adaptive optimization of the motor 100 magnetic circuit and winding 130, this ensures the continuous and stable operation of the compressor under high-load conditions. This effectively improves the compressor's displacement capacity and structural load-bearing performance, addressing the critical requirements of high-power refrigeration systems for compressor output capacity and operational stability.

[0043] In one embodiment, please refer to Figure 1 and Figure 6 The conductor of winding 130 is made of at least aluminum. It is understood that the compressor motor 100 of this solution is configured as an aluminum wire motor 100. For example, high-purity oxygen-free aluminum (purity greater than or equal to 99.7%) is used. While ensuring the electrical performance and operational reliability of the motor 100, this reduces the material cost and overall weight of the compressor, solving the high cost and resource constraints associated with traditional copper wire windings 130. When aluminum wire is used as the conductor of winding 130, its density is only approximately 30% of that of copper. While the cross-sectional area needs to be increased to maintain the same length and resistance requirements, the overall weight can still be significantly reduced, facilitating lightweight design of the compressor and overall vibration control. Furthermore, aluminum resources are abundant and inexpensive, and using aluminum wire can significantly reduce raw material procurement costs and enhance product market competitiveness. In view of the technical difficulties such as low conductivity of aluminum wire, high connection process requirements, easy oxidation and relatively weak mechanical strength, this solution systematically solves them through coordinated optimization with other structural parameters: First, by limiting the outer diameter D1 of the stator core 110 to 130-300mm and the axial length L to 80-200mm, and meeting D1 2 ×L and D2×H×B×U (4.3 to 5.4 times), ensuring that the stator core 110 has sufficient magnetic load capacity to compensate for the insufficient magnetic field strength that may be caused by the aluminum wire, thereby ensuring high power output capability; secondly, by setting the wire diameter of the main winding, auxiliary winding or three-phase winding 130 to meet D 2 The proportional relationship between ΔH / (4πN) and D2×H / U is optimized to reduce current density, ensure the wire diameter is suitable for high load requirements, and control temperature rise within a safe range. Furthermore, the width W of the stator slots 111 is designed to be 2.3-3.5 mm, and the ratio of slot depth T1 to core radial width T2 is controlled between 60% and 75%, effectively improving the slot fill factor and reducing the risk of scratches and breakage during the winding process. Furthermore, the number of stator slots 111 is set to 12n, and the slot shape is uniform, enhancing the symmetry of the winding 130 and adapting it to the winding process, reducing the winding breakage rate to below 1%. Furthermore, the operating current I2 of the overload protector 140 and the locked-rotor current I1 meet the condition of 1.3I2≤I1≤1.5I2, and the spacing between the overload protector 140 and the winding 130 is no greater than 10 mm. This ensures a more sensitive response to the thermal state of the aluminum wire winding 130 and prevents potential safety hazards caused by changes in contact resistance or local overheating.

[0044] In summary, this solution leverages aluminum wire with the electromagnetic design, structural dimensions, thermal management, and protection mechanisms of motor 100, leveraging the advantages of aluminum's lightweight and low cost while overcoming its limitations in conductivity, processability, and reliability. This solution achieves a combination of high power, high reliability, and cost-effectiveness, making it suitable for large-scale deployment in medium-to-large commercial and residential variable-frequency compressors. The compressor's gauge pressure (U) is between 4.0 MPa and 5.0 MPa, suitable for R32 refrigerant. The corresponding motor 100 has a rated power of 3 kW to 10 kW and a displacement greater than or equal to 30 cc / rev (milliliters per revolution).

[0045] In one embodiment, please refer to Figure 1 The motor 100 further includes a rotor 120 rotatably mounted on the inner periphery of the stator core 110 . The cross-sectional area of ​​the bars of the rotor 120 is S1 , and the cross-sectional area of ​​the wire of the winding 130 is S2 , satisfying: , where S1 and S2 are in mm 2 It can be understood that the rotor 120 of this embodiment adopts a squirrel-cage structure, and the cross-sectional area S1 of its conductive bar and the cross-sectional area S2 of the stator winding 130 wire satisfy the ratio S1 / S2 between 1.2 and 1.5. This achieves a precise match between the current carrying capacity and electromagnetic coupling characteristics of the conductive parts of the stator 100 and the rotor 120 of the motor 100, and is more suitable for application scenarios where the winding 130 uses aluminum wire as the conductor material. It should be noted that since the resistivity of aluminum wire is approximately 1.6 times that of copper, under the same power conditions, in order to reduce the resistance of the winding 130 and control copper loss and temperature rise, the aluminum wire cross-sectional area S2 needs to be appropriately increased. The rotor 120 bars are typically formed by a die-casting process using aluminum or copper materials. If S1 / S2 is too small, that is, the cross-sectional area of ​​the rotor 120 bars is relatively insufficient, the rotor 120 resistance will be relatively high, which will not only increase the aluminum loss of the rotor 120, but may also cause a decrease in starting torque, an increase in slip rate, and a decrease in efficiency. This is more obvious when the compressor is frequently started and stopped or under high load operation. If S1 / S2 is too large, the cross-sectional area of ​​the rotor 120 bars is excessively increased, which will weaken the filling space of the winding 130 in the stator slot 111, affect the magnetic circuit distribution of the stator core 110, and may cause the inertia of the rotor 120 to increase, affecting the dynamic response performance. Of course, in other embodiments, the motor 100 can also be configured as a permanent magnet motor.

[0046] By controlling S1 / S2 in the range of 1.2-1.5, the rotor 120 conducting bar has sufficient current-carrying capacity to match the magnetic field and current level generated by the stator winding 130, realizes good electromagnetic energy transmission, improves the efficiency and output capacity of the motor 100, avoids material waste and structural space conflict; at the same time, the ratio is matched with the parameters such as the shape of the stator slot 111, the size of the stator core 110, the number of turns N and the voltage U of the winding 130, the pressure B, etc., optimizes the load distribution and thermal balance characteristics of the motor 100, ensures that the current density distribution of the stator and rotor 120 is reasonable, the temperature rise is uniform, and effectively prevents the risk of insulation aging of the winding 130 or rupture of the rotor 120 conducting bar caused by local overheating. In addition, when the aluminum wire winding 130 is used, the ratio is limited It can also compensate for the electromagnetic asymmetry caused by the lower conductivity of aluminum material, improve the three-phase current balance and running stability, and enhance the adaptability and long-term operation reliability of the compressor under variable frequency and variable load conditions.

[0047] The application also provides a refrigeration equipment, which comprises the compressor, and the specific structure of the compressor is the same as that of the above-mentioned embodiments. Since the refrigeration equipment adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The refrigeration equipment can be configured as an air conditioner, a refrigerator or the like.

[0048] The above-mentioned is only an exemplary embodiment of the application, and does not limit the protection scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields within the technical concept of the application and the content of the specification and drawings are included in the protection scope of the application.

Claims

1. A compressor, characterized in that: include: a motor, the motor comprising a stator core and a winding, the winding being provided on the stator core, the maximum outer diameter of the stator core being D1, and the axial length of the stator core being L along the compressor; and A cylinder, wherein the cylinder and the stator core are distributed along the axial direction, the height of the cylinder in the axial direction is H, and the inner diameter of the cylinder is D2; satisfy: , where U is the maximum voltage of the compressor, in V, B is the gauge pressure of the compressor, in MPa, and the units of D1, L, D2, and H are in mm.

2. The compressor according to claim 1, wherein The motor is configured as a single-phase motor, the number of turns of the motor is N, the winding includes a main winding and a secondary winding, the wire diameter of the main winding is D3, the wire diameter of the secondary winding is D4, and the wire diameter of the main winding satisfies: , the wire diameter of the secondary winding satisfies: , where the units of D3 and D4 are mm.

3. The compressor according to claim 1, wherein The motor is configured as a three-phase motor, the number of turns of the motor is N, the wire diameter of the winding is D5, and the following conditions are met: , the unit of D5 is mm.

4. The compressor according to claim 2 or 3, characterized in that The wire diameter of the winding ranges from 0.8 mm to 2.0 mm. The conducting wire of the winding is configured as an enameled wire, and the coating thickness of the enameled wire ranges from 0.08 mm to 0.12 mm.

5. The compressor according to claim 1, wherein The compressor further includes an overload protector. The locked-rotor current of the compressor is I1, and the operating current of the overload protector is I2, which satisfies: , where the unit of I1 and I2 is A.

6. The compressor according to claim 5, characterized in that The distance between the overload protector and the winding is no more than 10 mm.

7. The compressor according to claim 1, wherein A plurality of stator teeth are evenly distributed on the inner circumference of the stator core, a stator slot is formed between two adjacent stator teeth, the number of stator slots of the stator core is 12n, n is a positive integer, and the slot areas and shapes of the plurality of stator slots are uniform.

8. The compressor according to claim 7, wherein The width of the stator slot along the circumferential direction is W, which satisfies: ; And / or, the radial slot depth of the stator slot is T1, and the radial width of the stator core is T2, satisfying: , the unit of T1 and T2 is mm.

9. The compressor according to claim 1, wherein The maximum outer diameter D1 of the stator core also satisfies: , the axial length L of the stator core along the compressor also satisfies: ; And / or, the axial height H of the cylinder and the inner diameter D2 of the cylinder further satisfy: .

10. The compressor according to claim 1, wherein The material of the winding wire is at least aluminum; And / or, the motor further comprises a rotor rotatably mounted on the inner circumference of the stator core, the cross-sectional area of ​​the rotor bars is S1, the cross-sectional area of ​​the winding wires is S2, and the following conditions are satisfied: , where S1 and S2 are in mm 2 .

11. A refrigeration device, characterized in that: Comprising the compressor according to any one of claims 1 to 10.

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