Compressor and refrigeration equipment

Abstract

The utility model discloses a compressor and refrigeration equipment, relates to motor technical field, the compressor includes shell and motor, motor includes stator subassembly and is provided the rotor subassembly of stator subassembly radial inner side, stator subassembly includes a plurality of stator units of interval distribution along the circumference of shell, and the rotor subassembly is provided with the rotor subassembly of stator subassembly radial inner side. Each stator unit comprises a plurality of stator punching sheets which are sequentially stacked in the axial direction of the stator assembly, each stator unit comprises a yoke part and tooth parts arranged on the inner side of the yoke part, a winding groove is formed between every two adjacent tooth parts, a notch is formed in the outer side of each yoke part, and an oil return channel is defined between each yoke part and the inner wall of the shell; wherein the cross sectional area of the notch is S1, the cross sectional area of the stator unit is S2, 0.08 < = S1 / S2 < = 0.12, the area of the oil return channel on the stator assembly can ensure the oil return of the compressor and the oil spitting amount, and meanwhile, the notch is not too large to influence the strength of the motor.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a compressor and refrigeration equipment. Background Technology

[0002] Compressors require sufficient lubricating oil during operation to reduce friction and wear. If the oil discharge is too low, an oil film may not form effectively, increasing the risk of direct contact between metal parts. This can lead to insufficient lubrication, accelerated component wear, and increased risk of failure. In some types of compressors, the presence of oil helps seal the gas. Insufficient oil discharge can cause gas leakage, reducing the compressor's output capacity and affecting the overall system efficiency and performance. Therefore, the motor is a crucial component in a compressor, and its efficiency directly impacts the compressor's energy efficiency. Utility Model Content

[0003] The main purpose of this invention is to propose a compressor and refrigeration equipment that aims to improve motor performance, increase slot fill factor, ensure oil discharge, and maintain motor strength.

[0004] To achieve the above objectives, the compressor proposed in this utility model includes:

[0005] The shell; and,

[0006] An electric motor is disposed within the housing. The electric motor includes a stator assembly and a rotor assembly disposed radially inside the stator assembly. The stator assembly includes a plurality of stator units spaced apart circumferentially along the housing. Each stator unit includes a plurality of stator laminations stacked sequentially in the axial direction of the stator assembly. Each stator unit includes a yoke and a toothed portion disposed inside the yoke. A winding groove is provided between two adjacent toothed portions. A notch is provided on the outer side of the yoke to define an oil return channel between it and the inner wall of the housing.

[0007] Wherein, the cross-sectional area of ​​the notch is S1, the cross-sectional area of ​​the stator unit is S2, and 0.08≤S1 / S2≤0.12.

[0008] In one embodiment, a connecting groove is provided on the outer side of the yoke, penetrating the upper and lower end faces of the stator assembly, and the connecting groove forms the notch;

[0009] The connecting groove is configured as a stepped groove, having a first groove segment, a second groove segment, and a third groove segment arranged sequentially from the inside to the outside, wherein the included angle formed between the side wall and the bottom wall of the second groove segment is an acute angle.

[0010] In one embodiment, the maximum depth of the connecting groove is H1, the height of the second groove segment is H2, the distance between the bottom of the first groove segment and the inner end of the yoke is H3, and the distance between the outer wall and the inner wall of the yoke is H, wherein 0.4≤H1 / H≤0.6, 0.35≤H2 / H1≤0.55, and 0.55≤H3 / H1≤0.7.

[0011] In one embodiment, the minimum width of the tooth in the circumferential direction of the stator assembly is W, the width of the bottom of the third slot is W1, and the width of the bottom of the second slot is W2, wherein 1.7≤W1 / W≤2.1 and 0.9≤W2 / W1≤1.15.

[0012] In one embodiment, the included angle formed between the sidewall and bottom wall of the third groove segment is A, wherein 100°≤A≤140°.

[0013] In one embodiment, the included angle between the sidewall and the bottom wall of the second groove segment is B, wherein 40°≤B≤80°.

[0014] In one embodiment, the cross-section of the first groove segment is set to be semi-circular, rectangular, or stepped.

[0015] In one embodiment, the first groove segment is located at the middle of the bottom of the second groove segment; and / or,

[0016] The second groove segment is located at the middle of the bottom of the third groove segment.

[0017] This utility model also provides a refrigeration device, the refrigeration device including a compressor, the compressor comprising:

[0018] The shell; and,

[0019] An electric motor is disposed within the housing. The electric motor includes a stator assembly and a rotor assembly disposed radially inside the stator assembly. The stator assembly includes a plurality of stator units spaced apart circumferentially along the housing. Each stator unit includes a plurality of stator laminations stacked sequentially in the axial direction of the stator assembly. Each stator unit includes a yoke and a toothed portion disposed inside the yoke. A winding groove is provided between two adjacent toothed portions. A notch is provided on the outer side of the yoke to define an oil return channel between it and the inner wall of the housing.

[0020] Wherein, the cross-sectional area of ​​the notch is S1, the cross-sectional area of ​​the stator unit is S2, and 0.08≤S1 / S2≤0.12.

[0021] In one embodiment, the refrigeration equipment includes an air conditioner.

[0022] In the technical solution of this utility model, when winding is required, the multiple stator units connected in a ring are separated. After fixing each stator unit with a fixing fixture, the enameled wire is wound on the teeth of the corresponding stator unit, without being restricted by other stator units, thereby increasing the slot fill factor. The ratio of the cross-sectional area S1 of the notch to the cross-sectional area S2 of the stator unit is constrained to between 0.08 and 0.12. The area of ​​the oil return channel on the stator assembly can ensure the oil return of the compressor and ensure the oil discharge volume. At the same time, the notch is not too large to affect the strength of the motor. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of an embodiment of the compressor provided by this utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of one embodiment of the electric motor;

[0026] Figure 3 for Figure 2 A schematic diagram of the structure of an embodiment of the middle stator unit;

[0027] Figure 4 for Figure 3 Dimensional diagram of the middle stator unit;

[0028] Figure 5 for Figure 2 A schematic diagram of another embodiment of the middle stator unit;

[0029] Figure 6 for Figure 2 A schematic diagram of the structure of another embodiment of the middle stator unit;

[0030] Figure 7 for Figure 2 A schematic diagram of another embodiment of the middle stator unit;

[0031] Figure 8 for Figure 1 A schematic diagram showing the changes in stator deformation and compressor oil discharge rate in the middle stator assembly as a function of S1 / S2;

[0032] Figure 9 for Figure 1 A comparison chart of the oil discharge volume of the compressor under different operating conditions.

[0033] Explanation of icon numbers:

[0034] 100. Compressor; 10. Housing; 20. Motor; 1. Stator assembly; 2. Rotor assembly; 11. Stator unit; 111. Yoke; 112. Tooth; a. Winding slot; b. Notch; b1. First slot segment; b2. Second slot segment; b3. Third slot segment.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] Compressors require sufficient lubricating oil during operation to reduce friction and wear. If the oil discharge is too low, an oil film may not form effectively, increasing the risk of direct contact between metal parts. This can lead to insufficient lubrication, accelerated component wear, and increased risk of failure. In some types of compressors, the presence of oil helps seal the gas. Insufficient oil discharge can cause gas leakage, reducing the compressor's output capacity and affecting the overall system efficiency and performance. Therefore, the motor is a crucial component in a compressor, and its efficiency directly impacts the compressor's energy efficiency.

[0040] This invention proposes a compressor designed to improve motor performance, increase slot fill factor, ensure oil output, and maintain motor strength.

[0041] Please see Figures 1 to 3 In one embodiment of the present invention, the compressor 100 includes a housing 10 and a motor 20. The motor 20 is disposed within the housing 10. The motor 20 includes a stator assembly 1 and a rotor assembly 2 disposed radially inside the stator assembly 1. The stator assembly 1 includes a plurality of stator units 11 arranged at intervals along the circumference of the housing 10. Each stator unit 11 includes a plurality of stator laminations stacked sequentially in the axial direction of the stator assembly 1. The stator unit 11 includes a yoke 111 and a tooth 112 disposed inside the yoke 111. A winding groove a is provided between two adjacent tooth 112. A notch b is provided on the outer side of the yoke 111 to define an oil return channel between it and the inner wall of the housing 10. The cross-sectional area of ​​the notch b is S1, the cross-sectional area of ​​the stator unit 11 is S2, and 0.08≤S1 / S2≤0.12.

[0042] It is understood that the stator assembly 1 includes a plurality of stator units 11 arranged circumferentially along the housing 10, replacing the traditional integral stator with a plurality of independent stator units 11 arranged circumferentially, and each stator unit 11 is detachably connected to form a ring structure.

[0043] It should be noted that the cross-sectional area S1 of the notch b refers to the cross-sectional size of the notch b provided on the outside of the yoke 111 of the stator unit 11. Since the outer periphery of the yoke 111 is on a circle, the cross-sectional area of ​​the notch b is defined for the area missing by the notch b when the outer periphery of the stator assembly 1 is a complete circle.

[0044] It should also be noted that S1 / S2 represents the oil return efficiency and structural strength, and the ratio between the cross-sectional area (S1) of the notch b and the cross-sectional area (S2) of the stator unit 11 should be controlled between 0.08 and 0.12. This ensures a sufficiently large area for the oil return channel, allowing the lubricating oil to flow smoothly back to where lubrication is needed, thereby guaranteeing the normal operation and performance of the compressor 100.

[0045] Considering the structural strength of the stator assembly 1, if the area of ​​the notch b is too large, it may cause insufficient mechanical strength of the motor 20 during operation, affecting its stability and lifespan, and ultimately leading to the deterioration of the strength and noise of the compressor 100.

[0046] When S1 / S2 < 0.08: the oil return efficiency decreases by 35%, the bearing temperature rises by more than 10°C, and the risk of poor lubrication increases by 3 times.

[0047] When S1 / S2>0.12: the stator stiffness decreases by 18%, electromagnetic noise increases by 5dB(A), and the resonance probability increases by 40%.

[0048] In the technical solution of this utility model, when winding is required, the multiple stator units 11 connected in a ring are separated. After each stator unit 11 is fixed by a fixing fixture, the enameled wire is wound on the tooth 112 of the corresponding stator unit 11, without being restricted by other stator units 11, thereby increasing the slot fill factor. The ratio of the cross-sectional area S1 of the notch b to the cross-sectional area S2 of the stator unit 11 is constrained to between 0.08 and 0.12. The area of ​​the oil return channel on the stator assembly 1 can ensure the oil return of the compressor 100 and ensure the oil discharge volume. At the same time, the notch b is not too large to affect the strength of the motor 20.

[0049] according to Figure 8 The diagram showing the stator deformation and compressor oil discharge in the stator assembly as a function of S1 / S2, and Table 1, show that when S1 / S2 is between 0.08 and 0.12, the stator deformation and compressor oil discharge are in a relatively balanced state, that is, the stator strength and compressor oil discharge are in a good balance.

[0050] Table 1

[0051] S1 / S2 Motor deformation (mm) Oil discharge rate of 90Hz compressor (mL / hr) 0.05 0.0025 0.4 0.06 0.0028 0.38 0.07 0.003 0.35 0.08 0.0032 0.33 0.09 0.0033 0.3 0.1 0.0035 0.28 0.11 0.0036 0.27 0.12 0.0037 0.26 0.13 0.0038 0.24 0.14 0.0039 0.22 0.15 0.004 0.21 0.16 0.0042 0.2 0.17 0.0045 0.17

[0052] according to Figure 9As shown in the comparison chart of the compressor's oil discharge under different operating conditions, at 90Hz and 120Hz, the oil discharge of the compressor provided by this utility model can just maintain the minimum range of oil required for the compressor to operate normally, which is 0.25mL / hr-0.35mL / hr, and the corresponding stator deformation is between 0.0025mm-0.004mm.

[0053] Taking the compressor operating at 90Hz as an example, the oil discharge rate of the compressor of this invention is approximately 0.33 mL / hr, and the stator deformation is 0.0032 mm. However, in the prior art, when the ratio of S1 to S2 is not constrained to be between 0.08 and 0.12, the oil discharge rate of the compressor is approximately 0.42 mL / hr, and the stator deformation is also greater than 0.0045 mm. In this case, the stator strength is weaker, and the oil discharge rate is larger.

[0054] It should be noted that the stator unit 11 needs to be fixed by a fixing fixture before the winding process. In order to facilitate the fixing of the stator unit 11, in this embodiment, the outer side of the yoke 111 is provided with a connecting groove that penetrates the upper and lower end faces of the stator assembly 1, and the connecting groove forms the notch b; the connecting groove is set as a stepped groove, having a first groove segment b1, a second groove segment b2 and a third groove segment b3 arranged sequentially from the inside to the outside, and the included angle formed between the side wall and the bottom wall of the second groove segment b2 is an acute angle.

[0055] Because the included angle between the sidewall and bottom wall of the second slot section b2 is an acute angle, the fixing fixture can be more securely installed in the second slot section b2. Compared to setting the included angle of the second slot section b2 to a right angle or an obtuse angle, the sidewall of the second slot section b2 can stop the fixing fixture from moving radially, ensuring that the stator unit 11 will not be displaced or detached during operations such as winding.

[0056] The second groove segment b2 serves two purposes: firstly, it facilitates the installation of the fixing fixture, and secondly, it connects the upper and lower surfaces of the stator assembly 1, allowing for the return of lubricating oil. However, relying solely on the second groove segment b2 makes it difficult to precisely control the oil return area. By setting the first groove segment b1 and the third groove segment b3, the total area of ​​the entire notch b can be flexibly adjusted to ensure that the oil return channel has a sufficient cross-sectional area to meet the needs of lubricating oil flow.

[0057] While ensuring the necessary oil return area, by rationally setting the first slot section b1 and the third slot section b3, stress can be effectively dispersed, reducing the impact of a single large-area opening on the integrity and robustness of the overall structure of the motor 20. By adjusting the dimensions of the first slot section b1 and the third slot section b3, various engineering requirements can be adapted without changing the functionality of the second slot section b2, improving the design flexibility and applicability.

[0058] Specifically, please refer to Figure 4 In this embodiment, the maximum depth of the connecting groove is H1, the height of the second groove segment b2 is H2, the distance between the bottom of the first groove segment b1 and the inner end of the yoke 111 is H3, and the distance between the outer wall and the inner wall of the yoke 111 is H, wherein 0.4≤H1 / H≤0.6, 0.35≤H2 / H1≤0.55, and 0.55≤H3 / H1≤0.7.

[0059] The maximum groove depth H1 of the connecting groove refers to the radial distance from the deepest part of the connecting groove to the outer surface of the yoke 111, which is the radial distance from the bottom of the first groove segment b1 to the outer surface of the yoke 111.

[0060] The height H2 of the second slot segment b2 refers to the radial height of the second slot segment b2 in the stator assembly 1.

[0061] The distance H3 between the bottom of the first groove segment b1 and the inner end of the yoke 111 represents the distance from the bottom of the first groove segment b1 to the inner edge of the yoke 111.

[0062] The distance between the outer and inner walls of the yoke 111 is H, which is the thickness of the yoke 111 in the radial direction of the stator assembly 1. The size of H determines the basic structural strength of the stator unit 11.

[0063] The ratio of the maximum depth of the connecting groove to the distance between the outer and inner walls of the yoke 111 is set to 0.4 ≤ H1 / H ≤ 0.6, thereby limiting the ratio of the maximum depth (H1) of the connecting groove to the thickness (H) of the yoke 111. Controlling this ratio between 0.4 and 0.6 ensures sufficient oil return area while maintaining the mechanical strength of the stator assembly 1. If H1 is too large, it may weaken the strength of the yoke 111, leading to deterioration of the motor 20's strength and increased deformation; if it is too small, it may affect the oil return efficiency.

[0064] The ratio of the height (H2) of the second groove segment b2 to the maximum groove depth (H1) is limited to the range of 0.35 ≤ H2 / H1 ≤ 0.55. This ensures that the second groove segment b2 can provide good support for the fixed tooling while also contributing to the effective area of ​​the oil return channel to a certain extent. If the H2 ratio is too high or too low, it may lead to unstable support or poor oil return.

[0065] The ratio of H3 to H1 is set within the range of 0.55 ≤ H3 / H1 ≤ 0.7 to ensure that the lubricating oil can smoothly enter the return oil channel and will not cause increased flow resistance or other problems due to improper inlet position, thereby improving the fluidity of the lubricating oil and thus improving the efficiency of the overall system.

[0066] In summary, if the ratios of H1 / H, H2 / H1, or H3 / H1 are too small, meaning the depth or height of the connecting groove (notch b) is insufficient, the cross-sectional area of ​​the oil return channel will be reduced. This will obstruct the flow of lubricating oil, preventing it from effectively returning to the critical parts of the compressor 100, thus affecting the oil output and overall lubrication effect of the compressor 100. Insufficient lubricating oil supply will lead to increased friction and higher temperature, potentially shortening the lifespan of the compressor 100 and reducing its operating efficiency. If the ratios of H1 / H, H2 / H1, or H3 / H1 are too large, meaning the depth or height of the connecting groove exceeds a reasonable range, it will weaken the mechanical strength of the yoke 111. Excessive structural weakening may cause the motor 20 to deform or even be damaged during operation. This will not only affect the operating efficiency of the motor 20 but may also cause vibration, noise, and other problems.

[0067] For further information, please refer to [link / reference]. Figure 3 and Figure 4 In this embodiment, the minimum width of the tooth 112 in the circumferential direction of the stator assembly 1 is W, the width of the bottom of the third slot segment b3 is W1, and the width of the bottom of the second slot segment b2 is W2, wherein 1.7≤W1 / W≤2.1 and 0.9≤W2 / W1≤1.15.

[0068] The minimum width W of the tooth 112 in the circumferential direction of the stator assembly 1 refers to the minimum distance between two adjacent winding slots a. The size of W represents how many conductors the winding can accommodate (i.e., slot fill factor).

[0069] The width W1 of the bottom of the third groove section b3 represents the effective area of ​​the oil return channel.

[0070] The width W2 of the bottom of the second groove section b2 represents the ease of cooperation with the fixed tooling and the size of the oil return channel.

[0071] The ratio of the bottom width W1 of the third groove segment b3 to the width W of the tooth 112 needs to be constrained to the range of 1.7 ≤ W1 / W ≤ 2.1. If the ratio of W1 / W is too small, the bottom of the third groove segment b3 will be too narrow, limiting the effective area of ​​the oil return channel, thereby affecting the flow efficiency of lubricating oil and resulting in insufficient oil discharge from the compressor 100. If W1 / W is too large, it will reduce the full circular portion of the outer edge of the stator unit 11. As a result, the welding position will be smaller during the welding of the stator assembly 1, making welding more difficult. Furthermore, the thickness of the yoke 111 (the radial dimension of the yoke 111 in the stator assembly 1) will be reduced, ultimately weakening the overall structural strength of the motor 20 and increasing the risk of deformation.

[0072] The ratio of the bottom width W2 of the second groove segment b2 to the bottom width W1 of the third groove segment b3 needs to be constrained to within the range of 0.9 ≤ W2 / W1 ≤ 1.15. If the ratio of W2 / W1 is too small, the bottom of the second groove segment b2 will be too narrow, which is not conducive to the stable placement of the fixture, increases the installation difficulty, and also affects the efficiency of the oil return channel. If W2 / W1 is too large, it will also lead to a reduction in the outer circular portion of the stator unit 11, making stator welding more difficult.

[0073] By constraining the ratio between the width of the tooth 112 and the bottom width of the third groove segment b3 and the second groove segment b2, the efficiency of lubricating oil flow can be ensured while the convenient installation of the fixed fixture is guaranteed and the structural strength of the motor 20 is maintained.

[0074] Specifically, please refer to Figure 3 and Figure 4 In this embodiment, the included angle formed between the sidewall and bottom wall of the third groove segment b3 is A, wherein 100°≤A≤140°.

[0075] If angle A is less than 100°, the transition between the sidewall and bottom wall of the third groove segment b3 is sharper, forming a more obvious sharp angle. Sharp angles are prone to becoming stress concentration points, increasing the risk of crack formation and increasing processing difficulty. Furthermore, due to stress concentration in the sharp angle area, fatigue damage may occur after long-term use, shortening the service life of the motor.

[0076] If angle A is greater than 140°, the opening of the third slot segment b3 will become wider, thereby reducing the effective thickness of the entire yoke 111. A thinner yoke 111 will weaken the motor 20's ability to resist external loads, increasing the risk of deformation or even breakage.

[0077] By setting A within the angular range of 100° to 140°, an overly sharp design is avoided, manufacturing difficulty is reduced, sufficient thickness of the yoke 111 is ensured, and the mechanical strength of the motor 20 is maintained.

[0078] For further information, please refer to [link / reference]. Figure 3 and Figure 4 In this embodiment, the included angle between the sidewall and bottom wall of the second groove segment b2 is B, where 40°≤B≤80°.

[0079] If angle B is less than 40°, the transition between the sidewall and bottom wall of the second groove segment b2 is too sharp, making it difficult to install the fixture and increasing the complexity of processing. Furthermore, if the acute angle is too small, stress concentration in this area can lead to fatigue damage, affecting the overall lifespan of the motor 20.

[0080] If angle B is greater than 80°, that is, the angle between the side wall and the bottom wall of the second groove segment b2 is close to 90 degrees, the fixing fixture is prone to move radially along the stator assembly 1, resulting in displacement or loosening.

[0081] By setting the angle between the sidewall and bottom wall of the second groove section b2 within the range of 40° to 80°, it is ensured that the fixing fixture can be stably installed on the second groove section b2, providing sufficient contact area and support force, thereby reducing processing difficulty and manufacturing cost.

[0082] Specifically, please refer to Figures 4 to 7 In this embodiment, the cross-section of the first groove segment b1 is set to be semi-circular, rectangular or stepped.

[0083] It is understandable that the bottom of the semi-circular cross section, that is, the first groove segment b1, is semi-circular.

[0084] The first groove segment b1 with a rectangular cross-section has straight sides and a flat bottom, which is suitable for situations where the manufacturing process requirements are relatively straightforward and complex geometry is not required.

[0085] The stepped cross-section allows for more complex adjustments to fluid dynamics or structural properties within a limited space.

[0086] Preferably, the first groove segment b1 is set as a semi-circular section. Compared with a rectangular or stepped cross-section, the semi-circular cross-section can achieve a smoother transition at the corner, thereby reducing stress concentration. Furthermore, the semi-circular cross-section is easier to process, avoiding the processing of sharp angles and reducing manufacturing costs and complexity.

[0087] Specifically, in this embodiment, the first groove segment b1 is located at the middle of the bottom of the second groove segment b2; and / or, the second groove segment b2 is located at the middle of the bottom of the third groove segment b3.

[0088] The first groove segment b1 is located at the middle of the bottom of the second groove segment b2, and the second groove segment b2 is located at the middle of the bottom of the third groove segment b3, to ensure that the connecting grooves (oil return channels) are symmetrically arranged. This arrangement ensures a uniform distribution of force throughout the stator assembly 1. Furthermore, during the process of lubricating oil returning to the oil sump of the compressor 100 through the oil return channel, the symmetrical arrangement promotes a more uniform and stable flow of lubricating oil, reducing noise and vibration caused by irregular flow.

[0089] This utility model also proposes a refrigeration device, which includes a heat exchanger and a compressor 100. The specific structure of the compressor 100 is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0090] The refrigeration equipment may be a refrigerator, an air conditioner, or a water dispenser, etc. In one specific embodiment, the refrigeration equipment includes an air conditioner.

[0091] By setting a reasonable S1 / S2 ratio, sufficient oil return channel area is ensured, allowing lubricating oil to circulate effectively, reducing energy loss due to insufficient lubrication, and lowering friction loss. This improves the working efficiency of the compressor 100 and enhances the energy efficiency ratio of the air conditioning system. Ensuring sufficient lubricating oil flow to lubricate moving parts reduces wear, prevents overheating, and avoids mechanical failures caused by poor lubrication, thereby significantly extending the service life of the compressor 100 and its associated air conditioning system.

[0092] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A compressor, characterized in that, include: case; as well as, An electric motor is disposed within the housing. The electric motor includes a stator assembly and a rotor assembly disposed radially inside the stator assembly. The stator assembly includes a plurality of stator units spaced apart circumferentially along the housing. Each stator unit includes a plurality of stator laminations stacked sequentially in the axial direction of the stator assembly. Each stator unit includes a yoke and a toothed portion disposed inside the yoke. A winding groove is provided between two adjacent toothed portions. A notch is provided on the outer side of the yoke to define an oil return channel between it and the inner wall of the housing. Wherein, the cross-sectional area of ​​the notch is S1, the cross-sectional area of ​​the stator unit is S2, and 0.08≤S1 / S2≤0.

12.

2. The compressor as described in claim 1, characterized in that, The outer side of the yoke is provided with a connecting groove that penetrates the upper and lower end faces of the stator assembly, and the connecting groove forms the notch; The connecting groove is configured as a stepped groove, having a first groove segment, a second groove segment, and a third groove segment arranged sequentially from the inside to the outside, wherein the included angle formed between the side wall and the bottom wall of the second groove segment is an acute angle.

3. The compressor as described in claim 2, characterized in that, The maximum depth of the connecting groove is H1, the height of the second groove segment is H2, the distance between the bottom of the first groove segment and the inner end of the yoke is H3, and the distance between the outer wall and the inner wall of the yoke is H, wherein 0.4≤H1 / H≤0.6, and 0.35≤H2 / H1≤0.55, and 0.55≤H3 / H1≤0.

7.

4. The compressor as described in claim 2, characterized in that, The minimum width of the tooth in the circumferential direction of the stator assembly is W, the width of the bottom of the third slot is W1, and the width of the bottom of the second slot is W2, wherein 1.7≤W1 / W≤2.1 and 0.9≤W2 / W1≤1.

15.

5. The compressor as described in claim 2, characterized in that, The included angle between the sidewall and bottomwall of the third groove section is A, where 100°≤A≤140°.

6. The compressor as described in claim 2, characterized in that, The included angle between the sidewall and bottom wall of the second groove section is B, where 40°≤B≤80°.

7. The compressor as described in claim 2, characterized in that, The cross-section of the first groove segment is set to be semi-circular, rectangular, or stepped.

8. The compressor as described in claim 2, characterized in that, The first groove segment is located at the middle of the bottom of the second groove segment; and / or, The second groove segment is located at the middle of the bottom of the third groove segment.

9. A refrigeration device, characterized in that, Includes the compressor as described in any one of claims 1 to 8.

10. The refrigeration equipment as described in claim 9, characterized in that, The refrigeration equipment includes an air conditioner.

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