Motor and compressor having the same

Abstract

The present invention provides a motor and a compressor having the same. The motor includes a stator core, and the stator core includes a stator yoke and stator teeth. There are multiple stator teeth, and the multiple stator teeth are arranged at intervals along the inner circumference of the stator yoke, and stator slots are formed between adjacent stator teeth; wherein, the cross-sectional area of ​​the stator core along the radial direction of the stator core is M, and the cross-sectional area of ​​the stator yoke along the radial direction of the stator core is B, and 0.9≥B / M≥0.25. By reasonably setting the cross-sectional ratio of the stator core and the stator yoke, especially by reasonably limiting the width of the stator yoke to a certain width range, the thickness of the stator yoke can be reduced, the slot area can be increased, the motor loss can be reduced, the motor efficiency can be improved, and the energy efficiency of the compressor having the motor can be improved. While maintaining the high efficiency of the motor, the stiffness of the motor stator is guaranteed, the vibration noise of the motor is reduced, and the overall noise of the compressor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor equipment, and in particular to a motor and a compressor having the same. Background Art

[0002] Environmental protection and energy conservation are key concerns for sustainable social development. With improvements in living standards, the popularity of refrigeration and air conditioning has increased. According to statistics, refrigeration and air conditioning account for 20% of annual electricity consumption nationwide. As a key component of refrigeration and air conditioning, the compressor consumes the largest proportion of energy. Therefore, reducing losses and improving the efficiency of the compressor motor are key issues.

[0003] Air conditioning noise is one of the most direct impacts on air conditioning performance. Compressor noise in the outdoor unit and the resulting housing vibration noise are the primary sources of outdoor noise. Electromagnetic vibration and noise from the compressor motor have also become a major concern within the refrigeration and air conditioning industry. Compressor vibration and noise not only directly impact the air conditioning experience but also affect the overall performance of the unit, including its service life and operational reliability.

[0004] As a core component of a compressor, the efficiency and noise of the motor directly affect the overall performance of the compressor. The efficiency and noise of the motor are mutually constrained. To meet energy-saving requirements, the higher the motor efficiency, the better. To improve user experience, the lower the motor noise, the better. However, improving motor efficiency requires a larger slot area, which will narrow the width of the motor's stator teeth and thin the stator yoke, reducing the stator stiffness, causing large motor vibration and noise. The compressor vibrates and makes large noise. To reduce motor noise and improve motor stiffness, the stator yoke width needs to be increased, but this will reduce motor efficiency. Therefore, high-efficiency and low-noise motors have become the research target of the industry. In the existing technology, by keeping the stator yoke unchanged and only changing the winding wire to improve the insulation properties, the compressor efficiency and compressor noise cannot be improved. Other methods are to inject insulating materials into the motor housing and adopt special motor housing protection methods to improve the insulation properties. Such a setting cannot improve the compressor efficiency and compressor noise. Some motors also use winding varnish dipping technology to bond loose windings together, which can only improve the tightness of the windings but cannot improve the stator structural stiffness, solve the noise caused by poor compressor structural rigidity, or improve compressor efficiency. Summary of the Invention

[0005] The main purpose of the present invention is to provide a motor and a compressor having the same, so as to solve the problem of high motor noise in the prior art.

[0006] To achieve the above-mentioned object, according to one aspect of the present invention, there is provided a motor, comprising: a stator core, the stator core comprising a stator yoke and stator teeth, the stator teeth being multiple and arranged at intervals along the inner circumference of the stator yoke, with stator slots formed between adjacent stator teeth; wherein the cross-sectional area of ​​the stator core along the radial direction of the stator core is M, the cross-sectional area of ​​the stator yoke along the radial direction of the stator core is B, and 0.9≥B / M≥0.25.

[0007] Furthermore, the motor further comprises: windings, the windings being wound on the stator teeth, the adjacent windings being arranged at a distance; reinforcements, reinforcements being arranged between adjacent windings, the cross-sectional area of ​​all reinforcements arranged between adjacent windings being A, in mm 2 , where 0.5≥A / B≥0.03.

[0008] Furthermore, (A*L) / (K*10)≥5, where K is the displacement of the compressor pump body, in cc; and L is the number of horses of the compressor.

[0009] Furthermore, the reinforcement is located in the stator slot, and the reinforcement is arranged in close contact with the winding, or the reinforcement is arranged in close contact with the insulating object and the winding arranged in the stator slot.

[0010] Furthermore, the cross-sectional area of ​​the stator tooth along the radial direction of the stator core is C, wherein 0.4≥A / C≥0.05.

[0011] Furthermore, the end portion of the reinforcement member facing the geometric center of the stator core is arranged at a distance from the inner circular profile of the stator core.

[0012] Furthermore, the reinforcement is made of a non-magnetic, high temperature resistant, refrigerant corrosion resistant, and insulating material.

[0013] Furthermore, the angle formed at the connection between the bottom of the stator slot and the slot wall is an acute angle or an obtuse angle, or the connection between the bottom of the stator slot and the slot wall is provided with an arc transition section, the radius of the arc transition section is D, wherein D≤1mm.

[0014] Furthermore, the reinforcement is wrapped around the end of the winding, filling the gap between the insulating frame and the end of the winding, and the axial height of the reinforcement along the stator core is lower than the height of the end surface of the insulating frame along the axial direction of the stator core.

[0015] Furthermore, a reinforcement is arranged in the stator slot, the reinforcement is arranged near the bottom of the stator slot and fits with the stator yoke, and a refrigerant flow space is formed between the side of the reinforcement near the geometric center of the stator core and the slot opening of the stator slot.

[0016] Furthermore, the cross-sectional area of ​​all the flow spaces in the radial direction of the stator core is E, wherein 1.3≥E / A≥0.6.

[0017] Furthermore, the reinforcement is arranged in the stator slot, and the end profile of the reinforcement facing the geometric center of the stator core is arranged to coincide with the inner circular profile of the stator core. A refrigerant through hole is provided in the middle of the reinforcement, and the refrigerant through hole is provided along the axial direction of the stator core.

[0018] Furthermore, there are multiple refrigerant through holes, and the multiple refrigerant through holes are arranged at intervals.

[0019] Furthermore, the sum of the cross-sectional areas of all the refrigerant through holes is F, wherein 1.2≥F / A≥0.7.

[0020] Furthermore, the cross section of the refrigerant through hole is circular, elliptical, rectangular or regular polygonal.

[0021] According to another aspect of the present invention, a compressor is provided, comprising a motor, which is the motor described above.

[0022] By applying the technical solution of the present invention, by reasonably setting the cross-sectional ratio of the stator core and the stator yoke, especially reasonably limiting the width of the stator yoke within a certain width range, the thickness of the stator yoke can be reduced, the slot area can be increased, the motor loss can be reduced, the motor efficiency can be improved, and the energy efficiency of the compressor equipped with the motor can be improved. While maintaining the high efficiency of the motor, the stiffness of the motor stator is guaranteed, the vibration noise of the motor is reduced, and the overall noise of the compressor is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 A schematic structural diagram of a first embodiment of a motor according to the present invention is shown;

[0025] Figure 2 A schematic structural diagram of a second embodiment of a motor according to the present invention is shown;

[0026] Figure 3 shows a schematic structural diagram of a third embodiment of a motor according to the present invention;

[0027] Figure 4 shows a schematic structural diagram of a fourth embodiment of a motor according to the present invention;

[0028] Figure 5 shows a schematic structural diagram of a fifth embodiment of a motor according to the present invention;

[0029] Figure 6 shows a structural schematic diagram of a sixth embodiment of a motor according to the present invention;

[0030] Figure 7 shows a structural schematic diagram of a seventh embodiment of a motor according to the present invention;

[0031] Figure 8 shows a schematic structural diagram of an eighth embodiment of a motor according to the present invention;

[0032] Figure 9 shows a schematic structural diagram of a ninth embodiment of a motor according to the present invention;

[0033] Figure 10 shows a schematic structural diagram of a tenth embodiment of a motor according to the present invention;

[0034] Figure 11 It shows a schematic structural diagram of an eleventh embodiment of a motor according to the present invention;

[0035] Figure 12 A schematic cross-sectional view of a stator core of a motor according to an embodiment of the present invention is shown;

[0036] Figure 13 A schematic diagram showing the comparison between the efficiency of a motor according to the present invention and the efficiency of a motor in the prior art is shown;

[0037] Figure 14 A schematic diagram showing a comparison between the efficiency of a compressor according to the present invention and that of a compressor in the prior art is shown;

[0038] Figure 15 A schematic diagram showing a comparison between the noise of a compressor according to the present invention and the noise of a compressor in the prior art is shown;

[0039] Figure 16 A schematic structural diagram of an embodiment of a compressor according to the present invention is shown.

[0040] The above drawings include the following reference numerals:

[0041] 10. stator yoke; 11. stator flow slot;

[0042] 20. stator teeth; 21. stator slots;

[0043] 30. Winding;

[0044] 40. Reinforcement member; 41. Refrigerant through hole;

[0045] 50. Overflow space;

[0046] 60. Shell; 61. Insulation paper;

[0047] 80. Limiting column; 81. Insulation material coating. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0052] Combine Figures 1 to 16 As shown, according to an embodiment of the present application, a motor is provided.

[0053] Specifically, if Figure 1As shown, the motor includes a stator core. The stator core includes a stator yoke 10 and stator teeth 20. The stator teeth 20 are multiple and spaced apart along the inner circumference of the stator yoke 10. Stator slots 21 are formed between adjacent stator teeth 20. The cross-sectional area of ​​the stator core along the radial direction of the stator core is M, and the cross-sectional area of ​​the stator yoke 10 along the radial direction of the stator core is B, and 0.9 ≥ B / M ≥ 0.25.

[0054] In this embodiment, by reasonably setting the cross-sectional ratio of the stator core and the stator yoke 10, especially by reasonably limiting the width of the stator yoke 10 within a certain width range, the thickness of the stator yoke can be reduced, the slot area can be increased, the motor loss can be reduced, the motor efficiency can be improved, and the energy efficiency of the compressor equipped with the motor can be improved. While maintaining the high efficiency of the motor, the stiffness of the motor stator is guaranteed, the motor vibration noise is reduced, and then the overall noise of the compressor is reduced.

[0055] The motor further includes a winding 30. The winding 30 is wound on the stator teeth 20, and adjacent windings 30 are arranged at a distance; a reinforcement 40 is provided between adjacent windings 30, and the cross-sectional area of ​​all reinforcements 40 provided between adjacent windings 30 is A, in mm2, wherein 0.5 ≥ A / B ≥ 0.03. (A*L) / (K*10) ≥ 5, wherein K is the compressor pump body displacement, in cc, and L is the number of compressors. This arrangement can reduce the thickness of the stator yoke, increase the slot area, reduce motor losses, improve motor efficiency, improve the energy efficiency of the compressor having the motor, maintain the motor's high efficiency while ensuring the stiffness of the motor stator, reduce motor vibration noise, and thereby reduce the overall noise of the compressor.

[0056] According to one embodiment of the present application, the reinforcement 40 is located in the stator slot 21 and is disposed in close contact with the winding 30. Alternatively, the reinforcement 40 is disposed in close contact with both the insulating member disposed in the stator slot 21 and the winding 30. This arrangement can improve the stability of the winding.

[0057] The cross-sectional area of ​​the stator tooth 20 along the radial direction of the stator core is C, wherein 0.4≥A / C≥0.05. Figure 12 As shown, Figure 12 The area of ​​the middle section line is C. This arrangement can minimize the material used for the stator yoke 10 and optimize the performance of the motor.

[0058] like Figure 5 As shown, the end of the reinforcement member 40 facing the geometric center of the stator core is set at a distance from the inner circular line of the stator core. Figure 5As shown at C in FIG. 4 , the reinforcement member 40 does not completely fill the slot opening of the stator slot 21. This arrangement can improve the stability of the winding.

[0059] Preferably, the reinforcement 40 is made of a non-magnetic, high-temperature, refrigerant-resistant, and insulating material. For example, the reinforcement 40 may be made of epoxy resin. This configuration can increase the service life of the reinforcement 40, thereby effectively improving the reliability and stability of the motor.

[0060] like Figure 7 As shown in E and W, the angle formed by the connection between the bottom of the stator slot 21 and the slot wall is an acute angle or an obtuse angle. Figure 6 As shown, the connection between the slot bottom and the slot wall of the stator slot 21 is provided with an arc transition section, the radius of the arc transition section is D, wherein D≤1mm. Such a setting can improve the motor performance.

[0061] like Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 10 、 Figure 11 As shown, the reinforcement 40 is wrapped around the end of the winding 30 and fills the gap between the insulation frame and the end of the winding 30. The axial height of the reinforcement 40 along the stator core is lower than the height of the end surface of the insulation frame along the axial direction of the stator core. That is, at the same reference point, the vertical height of the reinforcement 40 is lower than the vertical height of the insulation frame. Figure 4 The gap between the ends of the winding 30 is shown at D. This arrangement can improve the stability of the motor, wherein a limiting post 80 can be provided at the notch of the stator slot 21 to further improve the reliability of the motor.

[0062] According to another embodiment of the present application, Figure 9 As shown, the reinforcement 40 is disposed within the stator slot 21. The reinforcement 40 is positioned near the bottom of the stator slot 21 and abuts against the stator yoke 10. A coolant flow space 50 is formed between the side of the reinforcement 40 near the geometric center of the stator core and the notch of the stator slot 21. This arrangement reduces the amount of reinforcement 40 used while maintaining the stability of the motor winding installation.

[0063] Furthermore, the cross-sectional area of ​​all the flow spaces 50 in the radial direction of the stator core is E, where 1.3 ≥ E / A ≥ 0.6. In this application, "cross-sectional area" refers to the cross-sectional area in the radial direction of the stator core. This configuration can further improve the efficiency of the motor.

[0064] like Figures 6 to 8As shown, the reinforcement 40 is disposed within the stator slot 21. The end profile of the reinforcement 40, which faces the geometric center of the stator core, is aligned with the inner profile of the stator core. A coolant through hole 41 is provided in the middle of the reinforcement 40, extending through the stator core in the axial direction. This arrangement can also improve the efficiency of the motor.

[0065] like Figure 10 As shown, there is only one refrigerant through hole 41. Figure 11 As shown, there are two refrigerant holes 41, which are spaced apart. This arrangement allows the refrigerant to flow smoothly from one end of the motor to the other, improving the refrigerant flow. The sum of the cross-sectional areas of all refrigerant holes 41 is F, where 1.2 ≥ F / A ≥ 0.7. The cross-sectional shape of the refrigerant holes 41 is circular, elliptical, rectangular, or regular polygonal.

[0066] The motor in the above embodiment can also be used in the technical field of compressor equipment. That is, according to another aspect of the present invention, a compressor is provided. The compressor includes a motor, and the motor is the motor in the above embodiment.

[0067] Specifically, the motor of this application solves the problem of high motor loss and low efficiency, and can also solve the problem of low energy efficiency of the compressor using this motor. The rational design of the stator core structure solves the problem of low motor stiffness. The motor can also solve the problem of high vibration and noise in the motor and compressor.

[0068] Since there is a gap between the windings on adjacent teeth in the stator slot of the compressor motor, a reinforcement is added in this gap. The reinforcement is directly attached to the stator yoke or attached to the stator yoke through the slot insulation. The area occupied by the reinforcement in the radial cross-section of the stator is A, and the area occupied by the stator yoke in the radial cross-section of the stator is B. A and B should satisfy the following relationship: 0.5≥A / B≥0.03. This motor is a high-efficiency and low-noise motor. The thickness of the stator yoke is reduced, the slot area is increased, the motor loss is reduced, the motor efficiency is improved, the compressor energy efficiency is improved, and the high efficiency is maintained. At the same time, a reinforcement is added that is close to the yoke, the stator stiffness is increased, the motor vibration noise is reduced, and the noise of the entire compressor is reduced.

[0069] Specifically, the compressor includes a motor (such as Figure 16(As shown in Figure A), the pump assembly, housing, and liquid dispenser. The motor stator includes a stator core, an insulating frame, and windings. The stator core is equipped with a stator yoke, N stator teeth, and N stator slots, with windings wound around the stator teeth. Within the stator slots, there is a gap between the windings on adjacent teeth. Reinforcements are added within this gap, either directly attached to the stator yoke or attached to the stator yoke through slot insulation. The stator yoke contacts the compressor housing. The area of ​​the stator yoke within the radial cross-section of the stator is B, and the area of ​​the stator core is M. B and M should satisfy the following relationship: 0.9 ≥ B / M ≥ 0.25. The area of ​​the reinforcement within the radial cross-section of the stator is A, and the area of ​​the stator yoke within the radial cross-section of the stator is B. A and B should satisfy the following relationship: 0.5 ≥ A / B ≥ 0.03. The reinforcement is a component that can improve the overall stiffness of the motor. It can be a rigid material component, an injection molded part, a gel component, or other components with a certain quality. The side of the reinforcement close to the center of the stator is the inner side, and the side close to the outer circle of the stator is the outer side. As the core component of the compressor, the efficiency and noise of the motor directly affect the overall performance of the compressor. The efficiency and noise of the motor restrict each other. In order to meet the energy-saving requirements, the higher the motor efficiency, the better. In order to improve the user experience, the lower the noise of the motor, the better. However, to improve the efficiency of the motor, a larger slot area is required, which will narrow the width of the stator teeth of the motor, thin the thickness of the stator yoke, reduce the stiffness of the stator, and cause large vibration and noise of the motor. The compressor has large vibration and noise. In order to reduce the noise of the motor and improve the stiffness of the motor, the width of the stator tooth yoke needs to be increased, but the efficiency of the motor decreases, so high High-efficiency and low-noise motors have become the research goal of the industry. When the stator yoke contacts the compressor housing, the area occupied by the stator yoke in the radial cross-section of the stator is B, and the area of ​​the stator core is M. B and M should satisfy the following relationship: 0.9≥B / M≥0.25. At the same time, reinforcements are added in the gaps between the windings on adjacent teeth in the stator slots. The reinforcements are directly bonded to the stator yoke or bonded to the stator yoke through slot insulation to improve the stator stiffness and reduce the vibration noise of the motor. When 0.5≥A / B≥0.03, the yoke thickness is smaller, which can accommodate more windings and improve the motor efficiency. At the same time, reinforcements are used to improve the motor stiffness, reduce the motor vibration noise, and reduce the vibration noise of the compressor.

[0070] The area occupied by the reinforcement in the radial section of the stator is A, in mm 2 For calculations, assuming the compressor pump displacement is K (in cc) and the compressor rating is L, A, K, and L should satisfy the following relationship: (A*L) / (K*10) ≥ 5. This range allows for better balance between energy efficiency and reduced stator housing vibration, thus lowering compressor noise for each rating.

[0071] The reinforcement is located in the stator slot, that is, the reinforcement is located between the stator tooth winding and the tooth winding, and the edge of the reinforcement is in contact with the edge of the tooth winding, further increasing the amount of reinforcement used, while also being in contact with the stator winding to improve the overall stiffness of the motor. The area occupied by the reinforcement in the radial cross-section of the stator is A, and the area occupied by the stator tooth in the radial cross-section of the stator is C. A and C should satisfy the following relationship: 0.4≥A / C≥0.05. The tooth width is small, which can accommodate more windings and improve the efficiency of the motor. At the same time, the reinforcement is used to improve the stiffness of the motor, reduce the vibration noise of the motor, and reduce the vibration noise of the compressor. When A / C is less than 0.05, the amount of reinforcement used is small, and the effect on improving the stiffness of the motor and reducing the vibration noise of the motor is small. When A / C is greater than 0.4, the occupancy rate of the reinforcement is large, and the less winding will reduce the efficiency of the motor. At the same time, the tooth area is small, the tooth width is small, and the output torque of the motor is reduced.

[0072] In another embodiment of the present application, the inner edge of the reinforcement does not exceed the inner diameter of the stator core. The reinforcement is always fixed on the stator. When the motor is running, the rotor rotates at high speed. In order to prevent the problem of chamber sweeping that affects the reliability of the motor and the compressor, the inner edge of the reinforcement must not exceed the inner diameter of the stator.

[0073] The reinforcement material is non-magnetic. The reinforcement is in the stator slot. If it is magnetic, it will affect the magnetic circuit. The reinforcement is resistant to refrigerant corrosion. Refrigerant flows in the compressor. If it is not resistant to refrigerant, it will be corroded and produce impurities, reducing the reliability of the compressor. The reinforcement is resistant to high temperature and has good insulation. When the compressor runs at high speed, the motor temperature rises, and at the same time, the winding on the teeth is energized, which will further improve the insulation reliability of the motor.

[0074] There is no transition fillet between the stator slot bottom and the stator tooth, or the transition fillet radius D is ≤ 1mm. The stator slot insulation adopts the coating insulation material 81. The insulation material is applied inside the stator slot. The insulation material can completely cover the slot bottom corner. The insulation material coating thickness I is ≤ 0.5mm. The traditional motor slot insulation adopts the insulation paper 61. The insulation paper has high hardness and is not easy to bend at the slot bottom corner. Therefore, the transition fillet of the motor slot bottom corner is large, with a radius of at least about 2.5. Therefore, the winding cannot be wound into the slot bottom corner, which reduces the slot fill rate and the motor efficiency. Or the traditional motor The slot bottom corners of the machine core are also provided with transition fillets, and the transition fillet radius is about 2.5, which also reduces the number of winding turns in the slot and reduces the motor efficiency. When the slot insulation adopts coated insulation material, the insulation material is applied to the stator slot, and the insulation material can completely cover the slot bottom corners, so that the slot fill rate is improved, and the transition fillet radius of the stator core slot bottom corner can be less than 1mm, which increases the number of windings in the slot, reduces the motor operating current, reduces the motor copper loss, and improves the motor efficiency. The motor efficiency is improved by about 1.5%, thereby improving the energy efficiency of the compressor.

[0075] The insulation frame matching the stator does not have the limiting posts of the slot insulation paper. Traditional motor slot insulation uses insulation paper, so the insulation frame needs limiting posts for the slot insulation paper to fix the insulation paper. The slot insulation is changed to use coated insulation material, so the insulation frame does not need limiting posts. The limiting posts need to be avoided when winding the slot winding, which reduces the slot fill rate. When removing the limiting posts can ensure good insulation of the motor, the number of windings in the slot is increased, the slot fill rate is improved, the motor copper loss is reduced, the motor efficiency is improved, and the compressor energy efficiency is improved. The compressor energy efficiency is improved by about 7% on average, saving more electricity.

[0076] The reinforcement wraps the end of the winding and fills the gap between the insulating frame and the end of the winding to improve the tightness of the winding. At the same time, the reinforcement at the end further improves the stiffness of the motor, reduces the vibration noise of the motor, reduces the noise caused by the mechanical vibration of the compressor, and improves the reliability of the compressor. The reinforcement does not exceed the end face of the insulating frame in the axial direction. If it exceeds the end face of the insulating frame in the axial direction, it will lead to excessive use of reinforcement, increased material costs, increased cost of the whole machine, and reduced cost performance of the compressor.

[0077] The reinforcement is arranged at the bottom of the stator slot, and the outer side of the reinforcement fits the stator yoke. A refrigerant circulation space is left between the inner side of the reinforcement and the inner diameter of the stator. The space passes through the stator axially and is close to the rotor side. The space serves as a passage for the refrigerant discharged from the exhaust port of the pump body, reducing the aerodynamic noise in the compressor. While increasing the stiffness of the motor and reducing the mechanical vibration noise of the compressor, the aerodynamic noise of the compressor is reduced, and the synthetic noise of the entire compressor is reduced. The area occupied by the space in the radial cross-section of the stator is E, and the area occupied by the reinforcement in the radial cross-section of the stator is A. E and A should satisfy the following relationship: 1.3≥E / A≥0.6. The use of reinforcements increases the stiffness of the motor and reduces the vibration noise. At the same time, leaving a refrigerant passage can further reduce the aerodynamic noise. When 1.3≥E / A≥0.6, the vibration noise reduction effect brought about by the increase in stiffness is better, the aerodynamic noise reduction effect is better, and the noise reduction effect of the entire compressor is better.

[0078] The outer side of the reinforcement fits the stator yoke, and the inner side of the reinforcement fits the inner diameter of the stator. A refrigerant circulation space is reserved on the reinforcement, and the refrigerant circulation space is located in the middle of the stator slot. The area occupied by this space in the radial cross-section of the stator is F, and the area occupied by the reinforcement in the radial cross-section of the stator is A. F and A should satisfy the following relationship: 1.2≥F / A≥0.7. While ensuring sufficient refrigerant flow path, the length of the reinforcement in the radial direction of the motor can be increased, thereby further improving the stiffness of the motor, reducing the vibration noise of the motor, and reducing the vibration noise of the compressor.

[0079] The outer side of the reinforcement fits the stator yoke, and the inner side of the reinforcement fits the inner diameter of the stator. Multiple refrigerant circulation spaces are reserved on the reinforcement. The multiple refrigerant circulation spaces are evenly arranged along the radial direction of the stator. The area of ​​the multiple refrigerant circulation spaces is G, and the area occupied by the reinforcement in the radial cross-section of the stator is A. G and A should satisfy the following relationship: 1.2≥G / A≥0.7. Multiple refrigerant circulation spaces make the refrigerant circulation path evenly arranged in the circumferential direction. The uniform distribution makes the aerodynamic noise reduction more uniform, the aerodynamic noise is lower, the compressor noise is lower, and the compressor noise is reduced by an average of about 5dB.

[0080] The shape of the refrigerant space reserved by the reinforcement in the stator slot is circular. The circular circulation space can achieve the maximum circulation area in a smaller space, and achieve the best aerodynamic noise reduction effect in a smaller space, and the noise reduction effect of the compressor is the best. It can also be polygonal or other shapes. Figure 3 As shown, B is the geometric center line of the stator teeth, A is the geometric center line of the stator slot, and a stator flow slot 11 is provided at the edge of the stator core. Figures 13 to 15 The "new motor" here refers to the motor structure provided in this application.

[0081] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0082] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also falls within the scope of the present invention.

[0083] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A motor, characterized in that: include: A stator core, the stator core comprising a stator yoke (10) and stator teeth (20), the stator teeth (20) being multiple, the multiple stator teeth (20) being arranged at intervals along the inner circumference of the stator yoke (10), and stator slots (21) being formed between adjacent stator teeth (20); The cross-sectional area of ​​the stator core along the radial direction of the stator core is M, the cross-sectional area of ​​the stator yoke (10) along the radial direction of the stator core is B, and 0.9≥B / M≥0.25; The motor further comprises: a winding (30), the winding (30) being wound on the stator teeth (20), and adjacent windings (30) being arranged at a distance; A reinforcement member (40), wherein the reinforcement member (40) is provided between adjacent windings (30), and the cross-sectional area of ​​all the reinforcement members (40) provided between the adjacent windings (30) is A, in units of mm2, wherein 0.5 ≥ A / B ≥ 0.03; (A*L) / (K*10)≥5, where K is the compressor pump displacement in cc; L is the rating of the compressor.

2. The motor according to claim 1, characterized in that The reinforcement member (40) is located in the stator slot (21), and the reinforcement member (40) is arranged in a close relationship with the winding (30), or the reinforcement member (40) is arranged in a close relationship with the insulating object arranged in the stator slot (21) and the winding (30).

3. The motor according to claim 1 or 2, characterized in that The cross-sectional area of ​​all stator teeth (20) on the stator core along the radial direction of the stator core is C, wherein 0.4≥A / C≥0.

05.

4. The motor according to claim 2, characterized in that The end of the reinforcement (40) on the side facing the geometric center of the stator core is arranged at a distance from the inner circular profile of the stator core.

5. The motor according to claim 1, characterized in that The reinforcement (40) is made of a non-magnetic, high-temperature-resistant, refrigerant-corrosion-resistant, and insulating material.

6. The motor according to claim 1, characterized in that The angle formed at the connection between the slot bottom and the slot wall of the stator slot (21) is an acute angle or an obtuse angle, or, The connection between the slot bottom and the slot wall of the stator slot (21) is provided with an arc transition section, and the radius of the arc transition section is D, wherein D ≤ 1 mm.

7. The motor according to claim 1, characterized in that The reinforcement (40) is wrapped around the end of the winding (30), and the reinforcement (40) fills the gap between the insulating frame and the end of the winding (30). The height of the reinforcement (40) along the axial direction of the stator core is lower than the height of the end surface of the insulating frame along the axial direction of the stator core.

8. The motor according to claim 1, characterized in that The reinforcement (40) is arranged in the stator slot (21), and the reinforcement (40) is arranged close to the bottom of the stator slot (21) and fits with the stator yoke (10). A flow space (50) for the refrigerant to pass through is formed between the side of the reinforcement (40) close to the geometric center of the stator core and the slot opening of the stator slot (21).

9. The motor according to claim 8, characterized in that The cross-sectional area of ​​all the flow spaces (50) in the radial direction of the stator core is E, wherein 1.3≥E / A≥0.

6.

10. The motor according to claim 1, characterized in that The reinforcement (40) is arranged in the stator slot (21), and the end profile of the reinforcement (40) facing the geometric center of the stator core is arranged to coincide with the inner circular profile of the stator core. A refrigerant through hole (41) is provided in the middle of the reinforcement (40), and the refrigerant through hole (41) is provided to penetrate along the axial direction of the stator core.

11. The motor according to claim 10, characterized in that There are a plurality of refrigerant through holes (41), and the plurality of refrigerant through holes (41) are arranged at intervals.

12. The motor according to claim 10 or 11, characterized in that The sum of the cross-sectional areas of all the refrigerant through holes (41) is F, wherein 1.2≥F / A≥0.

7.

13. The motor according to claim 10, characterized in that The cross section of the refrigerant through hole (41) is circular, elliptical, rectangular or regular polygonal.

14. A compressor comprising a motor, characterized in that: The motor is the motor according to any one of claims 1 to 13.

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