A rotor core and a compressor

Abstract

The present invention discloses a rotor core and a compressor. The rotor core includes a core body, which is provided with a mounting hole and a flow hole extending in its own axial direction. The core body has an upper end face and a lower end face in the axial direction, and the flow hole penetrates the upper end face and the lower end face for the circulation of refrigerant; a phase-change heat pipe, a part of which is arranged in the mounting hole, and another part of which is arranged on the upper end face adjacent to the flow hole to contact the refrigerant, wherein the phase-change heat pipe is filled with a phase-change medium. Thus, according to the property of the phase-change medium that evaporates when heated and liquefies when cooled, a part of the phase-change heat pipe filled with the phase-change medium absorbs the heat of the core body in the mounting hole of the core body, and the other part contacts the refrigerant circulating in the flow hole on the upper end face of the core body to release the heat, thereby realizing efficient heat dissipation of the core body, so that the heat dissipation performance of the compressor using the rotor core is improved.

Description

Technical Field

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

[0002] A compressor is a driven fluid mechanical device that boosts low-pressure gas to high-pressure gas. The compressor mainly relies on the permanent magnet motor inside its shell to generate power to drive the piston to compress the refrigerant. When the compressor works for a long time, the internal motor will generate a lot of heat. However, the motor in the current compressor does not have a separate heat dissipation cooling structure. The heat dissipation of the motor mainly depends on the circulation of the refrigerant inside the compressor and the cooling oil of the pump body. However, the flow trajectory of the refrigerant and the cooling oil of the pump body is unpredictable. In addition, when the refrigerant and the cooling oil pass through the motor, their own temperature cannot be determined, which makes the heat dissipation effect of the motor in the compressor uneven, resulting in the overall heat dissipation effect of the compressor being less than ideal. Summary of the invention

[0003] The embodiments of the present invention provide a rotor core and a compressor to solve the problem that the heat dissipation effect of the existing compressor is not ideal.

[0004] In a first aspect, an embodiment of the present invention provides a rotor core, comprising:

[0005] The core body is provided with a mounting hole and a flow hole extending in the axial direction thereof, the core body having an upper end face and a lower end face in the axial direction, the flow hole penetrating the upper end face and the lower end face for the circulation of the refrigerant;

[0006] A phase change heat pipe, a part of which is arranged in the mounting hole, and another part of which is arranged on the upper end surface adjacent to the flow hole to contact the refrigerant, wherein the phase change heat pipe is filled with a phase change medium.

[0007] In the rotor core provided in an embodiment of the present invention, the phase change heat pipe includes a first pipe segment and a second pipe segment, the first pipe segment is inserted into the mounting hole, the second pipe segment is arranged on the upper end surface and connected to the first pipe segment, the flow hole is adjacent to the second pipe segment, and the phase change medium is filled in the first pipe segment.

[0008] In the rotor core provided in the embodiment of the present invention, the second pipe segment crosses above the center of the through hole, and the outer diameter of the second pipe segment is smaller than the diameter of the through hole.

[0009] In the rotor core provided in the embodiment of the present invention, a spiral guide groove extending spirally in the axial direction is provided on the inner wall of the first tube segment, and the spiral pitch of the spiral guide groove gradually increases from the lower end surface toward the upper end surface.

[0010] In the rotor core provided in an embodiment of the present invention, the axis of the mounting hole is inclined relative to the axis of the core body in the radial direction of the core body, and the end of the mounting hole adjacent to the lower end surface is close to the axis of the core body, and the end of the mounting hole adjacent to the upper end surface is far from the axis of the core body.

[0011] In the rotor core provided by the embodiment of the present invention, the axis of the mounting hole is inclined at an angle θ relative to the axis of the core body, wherein 3°≤θ≤5°.

[0012] In the rotor core provided in an embodiment of the present invention, a plurality of the mounting holes and the flow holes are provided, and the plurality of the mounting holes and the flow holes are spaced apart along the circumference of the core body, wherein at least one of the mounting holes is adjacent to at least one of the flow holes to define a group of heat dissipation holes, and the plurality of heat dissipation holes are equally spaced apart along the circumference of the core body.

[0013] In a second aspect, an embodiment of the present invention provides a compressor, which includes the rotor core described in the first aspect.

[0014] In the compressor provided in an embodiment of the present invention, the compressor also includes a shell and a guide member, the rotor core is arranged in the shell, the guide member is arranged in the shell and is located below the rotor core, and the guide member is provided with a first guide hole passing through the upper and lower sides thereof, the first guide hole is coaxial with the rotor core, and the diameter of the first guide hole is greater than the distance from the flow hole on the rotor core to the axis of the rotor core.

[0015] In the compressor provided in an embodiment of the present invention, a drainage tube extending toward the rotor core is provided on the inner side of the drainage member, the diameter of the drainage tube gradually decreases from bottom to top, and the first drainage hole is provided at one end of the drainage tube with a small diameter.

[0016] In the compressor provided in an embodiment of the present invention, the compressor also includes a stator, which is arranged in the shell and surrounds the outer side of the rotor core, and the guide member is also provided with a second guide hole passing through the upper and lower sides thereof, and a plurality of the second guide holes are arranged around the outer side of the first guide hole, wherein the distance from the second guide hole to the axis of the rotor core is greater than the inner diameter of the stator and smaller than the outer diameter of the stator.

[0017] In the compressor provided in an embodiment of the present invention, an oil pool is formed inside the shell below the guide member, an annular oil collecting groove is formed on the upper side of the guide member in the circumferential direction of the first guide hole, and an oil return notch is provided on the outer edge of the guide member, and the oil return notch connects the annular oil collecting groove and the oil pool.

[0018] The embodiment of the present invention provides a rotor core and a compressor, wherein the rotor core includes a core body and a phase-change heat pipe; the core body is provided with a mounting hole and a flow hole extending in its own axial direction, the core body has an upper end face and a lower end face in the axial direction, the flow hole penetrates the upper end face and the lower end face for the circulation of refrigerant; a part of the phase-change heat pipe is arranged in the mounting hole, and another part of the phase-change heat pipe is arranged on the upper end face adjacent to the flow hole to contact the refrigerant, wherein the phase-change heat pipe is filled with a phase-change medium. Thus, according to the property that the phase-change medium evaporates when heated and liquefies when cooled, a part of the phase-change heat pipe filled with the phase-change medium absorbs the heat of the core body in the mounting hole of the core body, and the other part contacts the refrigerant circulated in the flow hole on the upper end face of the core body to release the heat, thereby realizing efficient heat dissipation of the core body, and improving the heat dissipation performance of the compressor using the rotor core. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 A three-dimensional diagram of a rotor core provided by an embodiment of the present invention;

[0021] Figure 2 An axial view of a rotor core provided by an embodiment of the present invention;

[0022] Figure 3 Another stereoscopic view of a rotor core provided by an embodiment of the present invention;

[0023] Figure 4 Another axial view of the rotor core provided by an embodiment of the present invention;

[0024] Figure 5 A cross-sectional view of a rotor core provided by an embodiment of the present invention;

[0025] Figure 6 Another cross-sectional view of a rotor core provided by an embodiment of the present invention;

[0026] Figure 7 A three-dimensional diagram of a phase change heat pipe of a rotor core provided in an embodiment of the present invention;

[0027] Figure 8 A cross-sectional view of a phase change heat pipe of a rotor core provided in an embodiment of the present invention;

[0028] Fig. 9 for Figure 8A magnified view of part A;

[0029] Fig.10 A cross-sectional view of an iron core body of a rotor iron core provided in an embodiment of the present invention;

[0030] Fig.11 A three-dimensional diagram of an iron core body of a rotor iron core provided in an embodiment of the present invention;

[0031] Fig.12 An axial view of the core body of the rotor core provided by an embodiment of the present invention;

[0032] Fig.13 A cross-sectional view of a compressor provided by an embodiment of the present invention;

[0033] Fig.14 A three-dimensional diagram of a compressor provided by an embodiment of the present invention;

[0034] Fig.15 An axial diagram of a compressor provided by an embodiment of the present invention;

[0035] Fig.16 A three-dimensional diagram of a flow guide member of a compressor provided in an embodiment of the present invention;

[0036] Fig.17 Another stereoscopic view of a compressor provided by an embodiment of the present invention;

[0037] The reference numerals in the figures are:

[0038] 100, rotor core; 10, core body; 101, upper end surface; 102, lower end surface; 1010, mounting hole; 1020, flow hole; 20, phase change heat pipe; 21, first pipe section; 210, spiral guide groove; 22, second pipe section; 30, heat dissipation hole group; 200, compressor; 201, shell; 202, drainage piece; 203, drainage tube; 2021, first drainage hole; 2022, second drainage hole; 2023, oil return notch; 2024, annular oil collecting groove; 204, stator. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, but are not used to limit the present invention. In addition, in the drawings, structures with similar or identical structures are represented by the same reference numerals.

[0041] Reference Figures 1 to 12 For details, please refer to Figures 1 to 6 , which shows an embodiment of the rotor core provided by the present invention. The structure and working principle of the rotor core are described in detail below in conjunction with the drawings of the specification. The rotor core includes a core body 10 and a phase-change heat pipe 20; the core body 10 is provided with a mounting hole 1010 and a flow hole 1020 extending in its own axial direction, the core body 10 has an upper end face 101 and a lower end face 102 in the axial direction, and the flow hole 1020 penetrates the upper end face 101 and the lower end face 102 for the circulation of the refrigerant; a part of the phase-change heat pipe 20 is arranged in the mounting hole 1010, and another part of the phase-change heat pipe 20 is arranged on the upper end face 101 adjacent to the flow hole 1020 to contact the refrigerant, wherein the phase-change heat pipe 20 is filled with a phase-change medium.

[0042] In the specific implementation, the rotor core is mainly used as the basic structure of the motor rotor inside the compressor. In this embodiment, the rotor core is composed of a core body 10 and a phase change heat pipe 20. The core body 10 is the main body of the rotor core. During the design stage of the rotor core, the core body 10 is formed by stacking a certain number of rotor punchings. The core body 10 is provided with a mounting hole 1010 and a flow hole 1020 extending in its own axial direction (refer to Fig.10), the number of mounting holes 1010 and flow holes 1020 is not limited, and multiple mounting holes 1010 and flow holes 1020 can be set at the same time. The core body 10 has an upper end face 101 and a lower end face 102 in its axial direction, and the upper end face 101 and the lower end face 102 are two end faces opposite to each other in the axial direction of the core body 10. The mounting hole 1010 can be designed as a blind hole structure, or it can be designed as a through hole structure that passes through the upper end face 101 and the lower end face 102 of the core body 10. The flow hole 1020 is specifically a through hole structure that passes through the upper end face 101 and the lower end face 102 of the core body 10. The refrigerant inside the compressor can circulate between the upper end face 101 and the lower end face 102 of the core body 10 through the flow hole 1020. The refrigerant is a medium used to absorb and discharge heat, and adjust temperature and pressure inside the compressor, and it is mainly used for cooling. The direction of the refrigerant flow can be from the lower end face 102 of the core body 10 to the upper end face 101, or from the upper end face 101 of the core body 10 to the lower end face 102. The phase change heat pipe 20 is a closed tube structure with a hollow interior, and is designed with materials with good thermal conductivity such as copper and aluminum. A portion of the phase change heat pipe 20 is arranged in the mounting hole 1010, and another portion is located outside the mounting hole 1010 on the upper end face 101 of the core body 10 adjacent to the flow hole 1020. When the refrigerant flows in the flow hole 1020, the portion of the phase change heat pipe 20 adjacent to the flow hole 1020 will contact the refrigerant, so that the temperature of the portion of the phase change heat pipe 20 adjacent to the flow hole 1020 is lower than that of other portions. A certain amount of phase change medium is filled inside the phase change heat pipe 20. The phase change medium is a substance that can undergo a physical state change (such as solid to liquid, liquid to gas or vice versa) under specific temperature conditions. The phase change medium filled in the phase change heat pipe 20 has the physical property of evaporating when heated and liquefying when cooled, that is, the phase change medium is in liquid state at room temperature, and will undergo phase change after absorbing heat, and the liquid phase change medium will evaporate and become gaseous, and the phase change medium will undergo phase change again after being cooled, and the gaseous phase change medium will liquefy and become liquid. According to the physical properties of the phase change medium, when the motor is working, the temperature of the core body 10 rises, and the heat on the core body 10 will be absorbed by the phase change medium in the phase change heat pipe 20. After absorbing the heat, the phase change medium will undergo phase change, from liquid to gaseous, and the gaseous phase change medium enters the phase change heat pipe 20 and the part adjacent to the through hole 1020. Since the refrigerant will flow in the flow hole 1020, the refrigerant contacts the portion of the phase change heat pipe 20 adjacent to the flow hole 1020. Through the principle of convective heat transfer, the temperature of the portion of the phase change heat pipe 20 adjacent to the flow hole 1020 decreases, and the heat of the phase change medium in the phase change heat pipe 20 is absorbed and taken away by the refrigerant, so that the temperature of the gaseous phase change medium in the phase change heat pipe 20 decreases and phase changes again. The phase change medium changes from gas to liquid, and the liquid phase change medium flows back to the portion of the phase change heat pipe 20 provided in the mounting hole 1010 under the action of gravity and continues to absorb heat.Through the back-and-forth transformation of the phase change medium between the liquid state and the gas state, the phase change medium absorbs and releases heat cyclically, thereby achieving efficient heat dissipation of the core body 10 .

[0043] This embodiment uses the property of phase change medium that evaporates when heated and liquefies when cooled, and arranges part of the phase change heat pipe filled with phase change medium in the mounting hole of the core body to absorb the heat of the core body, and the other part is arranged on the upper end surface of the core body to contact the refrigerant flowing through the flow hole to release heat, thereby achieving efficient heat dissipation of the core body and improving the heat dissipation performance of the compressor using the rotor core.

[0044] In one embodiment, referring to Figures 6 to 8 The phase-change heat pipe 20 includes a first pipe segment 21 and a second pipe segment 22. The first pipe segment 21 is inserted into the mounting hole 1010. The second pipe segment 22 is arranged on the upper end surface 101 and connected to the first pipe segment 21. The through hole 1020 is adjacent to the second pipe segment 22. The phase-change medium is filled in the first pipe segment 21. In a specific implementation, the phase-change heat pipe 20 includes a first pipe segment 21 and a second pipe segment 22. The first pipe segment 21 is a straight pipe structure. The first pipe segment 21 is inserted into the mounting hole 1010. Its outer pipe wall is tightly fitted with the inner wall of the mounting hole 1010. The first pipe segment 21 serves as the main part for absorbing the heat of the core body 10. The second pipe segment 22 is located as a whole on the outside of the mounting hole 1010, and is arranged on the upper end surface 101 of the core body 10. The second pipe segment 22 is connected to the first pipe segment 21, and the flow hole 1020 is adjacent to the second pipe segment 22. The refrigerant flowing in the flow hole 1020 can contact the second pipe segment 22, and the second pipe segment 22 serves as the main part for releasing heat. The phase change medium is mainly filled in the first pipe section 21. At room temperature, the phase change medium is in liquid state in the first pipe section 21. Since the first pipe section 21 is in direct contact with the core body 10, the phase change medium absorbs the heat generated by the core body 10 in the first pipe section 21. After the phase change medium absorbs heat in the first pipe section 21, its temperature rises and a phase change occurs, from liquid to gas. The gaseous phase change medium rises and enters the second pipe section 22. The refrigerant circulates in the flow hole 1020 and comes into direct contact with the second pipe section 22. Through the principle of convective heat transfer, the temperature of the second pipe section 22 decreases, and the heat of the gaseous phase change medium entering the second pipe section 22 is absorbed and taken away by the refrigerant. At this time, the temperature of the gaseous phase change medium in the second pipe section 22 decreases and a phase change occurs again, from gas to liquid. The liquid phase change medium flows back to the first pipe section 21 under the action of gravity and continues to absorb heat. After the phase change medium transforms its state back and forth between the first tube segment 21 and the second tube segment 22, the phase change medium absorbs heat in the first tube segment 21 and releases heat in the second tube segment 22. The phase change medium absorbs and releases heat cyclically between the first tube segment 21 and the second tube segment 22, thereby achieving efficient heat dissipation of the core body 10.

[0045] Further, see Figures 4 to 6 , the second pipe section 22 is transversely disposed above the center of the through hole 1020, and the outer diameter of the second pipe section 22 is smaller than the diameter of the through hole 1020. In a specific implementation, the second pipe section 22 is transversely disposed on the upper end surface 101 of the core body 10, and is transversely disposed above the center of the through hole 1020 as a whole, and the second pipe section 22 is centered above the through hole 1020 as a whole. In order to improve the heat dissipation effect, a gap of 1 mm to 2 mm is left between the outer tube wall of the second pipe section 22 and the upper end surface 101 of the core body 10, and the outer diameter of the second pipe section 22 is smaller than the diameter of the through hole 1020, so that the refrigerant flowing from the through hole 1020 can be wrapped around the surface of the second pipe section 22, and the convection surface between the refrigerant and the second pipe section 22 is wider, thereby increasing the heat exchange area between the second pipe section 22 and the refrigerant, making the heat exchange efficiency of the phase change medium in the second pipe section 22 higher, and improving the overall heat dissipation effect.

[0046] In one embodiment, referring to Figure 8 and Fig. 9 , a spiral guide groove 210 extending spirally in the axial direction is provided on the inner wall of the first pipe section 21, and the spiral pitch of the spiral guide groove 210 gradually increases from the lower end surface 102 toward the upper end surface 101. In a specific implementation, a spiral guide groove 210 is provided on the inner wall of the first pipe section 21, and the spiral guide groove 210 is a groove structure extending spirally along the axial direction of the first pipe section 21 on the inner wall of the first pipe section 21, and the spiral pitch of the spiral guide groove 210 gradually increases from the lower end surface 102 of the core body 10 toward the upper end surface 101 of the core body 10, and the spiral pitch of the spiral guide groove 210 is the smallest at a position close to the lower end surface 102 of the core body 10, and the largest at a position close to the upper end surface 101 of the core body 10, and the starting spiral pitch can be designed to be 2 mm, and the ending spiral pitch can be designed to be 10 mm. By designing the spiral guide groove 210 with gradually increasing spiral pitch to guide the flow path of the phase change medium in the second pipe section 22, combined with the centrifugal force caused by the rotation of the rotor core during actual operation, the flow resistance of the phase change medium in the phase change heat pipe 20 can be reduced and the heat dissipation effect can be enhanced.

[0047] In one embodiment, referring to Figure 6 and Fig.10, the axis of the mounting hole 1010 is inclined relative to the axis of the core body 10 in the radial direction of the core body 10, and the end of the mounting hole 1010 adjacent to the lower end surface 102 is close to the axis of the core body 10, and the end of the mounting hole 1010 adjacent to the upper end surface 101 is away from the axis of the core body 10. In a specific implementation, the mounting hole 1010 is designed as a straight through hole structure, and the axis of the mounting hole 1010 is inclined at a certain angle relative to the axis of the core body 10 in the radial direction of the core body 10, such as Fig.10 As shown, m represents the axis of the mounting hole 1010, and n represents the axis of the core body 10. The end of the mounting hole 1010 adjacent to the lower end surface 102 of the core body 10 is close to the axis of the core body 10, and the end of the mounting hole 1010 adjacent to the upper end surface 101 of the core body 10 is away from the axis of the core body 10, that is, the mounting hole 1010 as a whole is inclined inward at the bottom and outward at the top. The inclination angle of the mounting hole 1010 relative to the axis of the core body 10 in the radial direction of the core body 10 can be designed according to actual needs and is not limited here. By designing the mounting hole 1010 to be inclined, the portion of the phase change heat pipe 20 disposed in the mounting hole 1010 is inclined relative to the axis of the core body 10 in the radial direction of the core body 10, just like the mounting hole 1010. The portion of the phase change heat pipe 20 disposed in the mounting hole 1010 is inclined outward from bottom to top with its back facing the axis of the core body 10. The contact area between the phase change heat pipe 20 and the core body 10 is larger, the heat exchange efficiency between the phase change medium and the core body 10 is higher, and the overall heat dissipation effect is better.

[0048] Further, refer to Fig.10 , the angle at which the axis of the mounting hole 1010 is inclined relative to the axis of the core body 10 is θ, wherein 3°≤θ≤5°. In a specific implementation, the angle at which the axis of the mounting hole 1010 is inclined relative to the axis of the core body 10 determines the angle at which the portion of the phase change heat pipe 20 disposed inside the mounting hole 1010 is inclined. In actual design, if the inclination angle is too large, it will affect the size design of the core body 10, while if the inclination angle is too small, the heat exchange area will not meet the requirements. Therefore, the angle at which the axis of the mounting hole 1010 is inclined relative to the axis of the core body 10 also needs to be reasonably designed. In this embodiment, Fig.10As shown, m represents the axis of the mounting hole 1010, n represents the axis of the core body 10, θ represents the inclination angle of the axis of the mounting hole 1010 relative to the axis of the core body 10, and the inclination angle of the axis of the mounting hole 1010 relative to the axis of the core body 10 is designed according to the relationship 3°≤θ≤5°, that is, the inclination angle of the axis of the mounting hole 1010 relative to the axis of the core body 10 is at least 5° and at most 3°. The inclination angle of the axis of the mounting hole 1010 relative to the axis of the core body 10 is designed to be within this range, so that the contact area between the phase change heat pipe 20 and the core body 10 can reach the most ideal state without affecting the size of the core body 10.

[0049] In one embodiment, referring to Fig.11 and Fig.12 There are multiple mounting holes 1010 and flow holes 1020, and the multiple mounting holes 1010 and flow holes 1020 are distributed at intervals along the circumference of the core body 10, wherein at least one mounting hole 1010 is adjacent to at least one flow hole 1020 to define a group of heat dissipation hole groups 30, and the multiple groups of heat dissipation hole groups 30 are distributed at equal intervals in the circumferential direction of the core body 10. In a specific implementation, a plurality of mounting holes 1010 and a plurality of flow holes 1020 are provided, and the plurality of mounting holes 1010 are spaced apart along the circumference of the core body 10. Similarly, the plurality of flow holes 1020 are spaced apart along the circumference of the core body 10, wherein at least one mounting hole 1010 is adjacent to at least one flow hole 1020 to define a heat dissipation hole group 30. For example, within a heat dissipation hole group 30, there may be a combination of a mounting hole 1010 adjacent to a flow hole 1020, or there may be a combination of two mounting holes 1010 adjacent to a flow hole 1020. This embodiment takes the combination of two mounting holes 1010 adjacent to a flow hole 1020 as an example. By setting the adjacent combination of the mounting holes 1010 and the flow holes 1020, a plurality of heat dissipation hole groups 30 are formed as a whole, and the plurality of heat dissipation hole groups 30 are equally spaced apart in the circumference of the core body 10. A plurality of phase-change heat pipes 20 are also provided, and the number of phase-change heat pipes 20 corresponds to the number of heat dissipation hole groups 30. A portion of each phase-change heat pipe 20 is provided in the mounting hole 1010 of each heat dissipation hole group 30, and another portion of each phase-change heat pipe 20 is provided on the upper end surface 101 of the core body 10 adjacent to the flow hole 1020 of each heat dissipation hole group 30. Overall, the phase-change heat pipe 20 cooperates with the heat dissipation hole groups 30 regularly distributed in the circumferential direction of the core body 10, thereby achieving uniform heat dissipation of the core body 10 and significantly improving the heat dissipation efficiency.

[0050] In one embodiment, referring to Fig.13, a compressor 200 is provided, the compressor 200 applies the rotor core 100 described in the above embodiment, the rotor core 100 is a part of the rotor of the motor inside the compressor 200, and the rotor core 100 is used to rotate with the shaft to generate power. Among them, since the above embodiment has made a detailed introduction to the specific structure of the rotor core 100, for the sake of simplicity of the specification, it will not be repeated here.

[0051] Further, refer to Figures 13 to 16 The compressor 200 further includes a housing 201 and a flow guide 202. The rotor core 100 is disposed in the housing 201. The flow guide 202 is disposed in the housing 201 and is located below the rotor core 100. The flow guide 202 is provided with a first flow guide hole 2021 that passes through the upper and lower sides thereof. The first flow guide hole 2021 is coaxial with the rotor core 100. The diameter of the first flow guide hole 2021 is greater than the distance from the flow hole 1020 on the rotor core 100 to the axis of the rotor core 100. In a specific implementation, the compressor 200 includes a housing 201 and a flow guide 202. The housing 201 of the compressor 200 is generally columnar. The interior of the housing 201 is a closed cavity for mounting components such as a motor. The rotor core 100 is disposed as a whole inside the housing 201. As a part of the rotor of the motor inside the compressor 200, the rotor core 100 is located in the middle section inside the housing 201. The guide member 202 is arranged inside the shell 201, and is located directly below the rotor core 100 as a whole. The guide member 202 is disc-shaped as a whole, and its outer side is tightly fitted with the inner wall of the shell 201, dividing the space below the rotor core 100 inside the shell 201 into upper and lower parts. A first guide hole 2021 is arranged on the guide member 202. The first guide hole 2021 is a circular through hole structure on the guide member 202, which passes through the upper and lower sides of the guide member 202. The first guide hole 2021 is coaxial with the rotor core 100, and the diameter of the first guide hole 2021 is greater than the distance from the through hole 1020 on the rotor core 100 to the axis of the rotor core 100, so that the through hole 1020 on the rotor core 100 is completely exposed in the first guide hole 2021. When the compressor 200 is actually working, the refrigerant will enter from the space below the guide piece 202 inside the shell 201, and under the guidance of the first guide hole 2021, it will evenly flow into the space above the guide piece 202 through the first guide hole 2021. The uniform refrigerant is directly blown toward the flow hole 1020 on the rotor core 100, so that the refrigerant flows in the flow hole 1020 and then cools the phase change heat pipe 20, which makes the heat dissipation of the rotor core 100 more uniform and the heat dissipation effect better as a whole.

[0052] Furthermore, refer to Fig.16, a flow guide tube 203 extending toward the rotor core 100 is provided on the inner side of the flow guide member 202, the caliber of the flow guide tube 203 gradually decreases from bottom to top, and the first flow guide hole 2021 is provided at one end of the flow guide tube 203 with a small diameter. In a specific implementation, a flow guide tube 203 extending toward the rotor core 100 is provided on the inner side of the flow guide member 202, the flow guide tube 203 is a conical short tube structure, both ends of the flow guide tube 203 are transparent, and its caliber gradually decreases from bottom to top, the caliber of the lower end of the flow guide tube 203 is larger than the caliber of the upper end, and the first flow guide hole 2021 is provided at one end of the flow guide tube 203 with a small diameter as a port of the flow guide tube 203. By gradually reducing the diameter of the drainage tube 203 from bottom to top, the drainage tube 203 can better guide the flow of the refrigerant, and the flow space of the refrigerant in the drainage tube 203 gradually shrinks, so that the flow rate of the refrigerant increases, which is more conducive to the heat exchange of the refrigerant and improves the heat dissipation efficiency.

[0053] In one embodiment, referring to Figures 13 to 17 , the compressor 200 further includes a stator 204, the stator 204 is arranged in the housing 201 and surrounds the outer side of the rotor core 100, the flow guide 202 is further provided with a second flow guide hole 2022 penetrating the upper and lower sides thereof, and a plurality of the second flow guide holes 2022 are arranged around the outer side of the first flow guide hole 2021, wherein the distance from the second flow guide hole 2022 to the axis of the rotor core 100 is greater than the inner diameter of the stator 204 and smaller than the outer diameter of the stator 204. In a specific implementation, the compressor 200 further includes a stator 204, which is a part of the motor inside the compressor 200, and is arranged on the outer side of the rotor core 100, and is mainly composed of a stator core and a stator 204 winding, and the stator 204 is mainly used to generate a rotating magnetic field to interact with the rotor core 100 so that the rotor core 100 drives the rotating shaft to rotate. A second flow guide hole 2022 is also provided on the flow guide member 202. The second flow guide hole 2022 is a through hole structure that passes through the upper and lower sides of the flow guide member 202. There are multiple second flow guide holes 2022, and multiple second flow guide holes 2022 are provided around the outer side of the first flow guide hole 2021. The distance from the second flow guide hole 2022 to the axis of the rotor core 100 is greater than the inner diameter of the stator 204 and smaller than the outer diameter of the stator 204, so that the second flow guide hole 2022 is always within the end face range of the stator 204 in the axial direction of the stator 204. When the compressor 200 is actually working, the refrigerant will enter from the space below the flow guide member 202 in the housing 201, and under the guidance of the second flow guide hole 2022, it will be accurately blown to the stator 204 through the multiple second flow guide holes 2022, so that the stator 204 can be evenly cooled.

[0054] In one embodiment, referring to Figures 14 to 16, an oil pool (not shown) is formed inside the housing 201 below the guide member 202, an annular oil collection groove 2024 is formed on the upper side of the guide member 202 in the circumferential direction of the first guide hole 2021, and an oil return notch 2023 is provided on the outer edge of the guide member 202, and the oil return notch 2023 connects the annular oil collection groove 2024 with the oil pool. In a specific implementation, an oil pool is formed inside the housing 201 below the guide member 202, and the oil pool is mainly used to recover the excess cooling oil generated by the pump body inside the compressor 200. An annular oil collection groove 2024 is formed on the upper side of the guide member 202 in the circumferential direction of the first guide hole 2021, and the annular oil collection groove surrounds the outer side of the first guide hole 2021 as a whole. The excess cooling oil generated by the pump body inside the compressor 200 will drip or flow down along the inner wall of the housing 201 under the action of gravity, and the cooling oil will first gather in the annular oil collection groove 2024. An oil return notch 2023 is provided on the outer edge of the guide member 202. The oil return notch 2023 is a notch structure formed by a recessed arrangement on the outer edge of the guide member 202. After the outer edge of the guide member 202 is tightly fitted with the inner wall of the shell 201 of the compressor 200, the oil return notch 2023 connects the annular oil collecting groove 2024 above the guide member 202 with the oil pool below the guide member 202. After a certain amount of cooling oil is collected in the annular oil collecting groove 2024, the cooling oil flows into the oil pool below the guide member 202 through the oil return notch 2023, thereby preventing the problem of insufficient lubrication caused by lack of oil in the oil pool.

[0055] The compressor in this embodiment adopts the rotor core provided by the present invention, so the heat dissipation performance of the compressor is improved and the reliability is better in practical applications.

[0056] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A rotor core, characterized in that: include: The core body is provided with a mounting hole and a flow hole extending in the axial direction thereof, the core body having an upper end face and a lower end face in the axial direction, the flow hole penetrating the upper end face and the lower end face for the circulation of the refrigerant; the axis of the mounting hole is inclined relative to the axis of the core body in the radial direction of the core body, and the end of the mounting hole adjacent to the lower end face is close to the axis of the core body, and the end of the mounting hole adjacent to the upper end face is far from the axis of the core body; A phase change heat pipe, a part of which is arranged in the mounting hole, and another part of which is arranged on the upper end surface adjacent to the flow hole to contact the refrigerant, wherein the phase change heat pipe is filled with a phase change medium.

2. The rotor core according to claim 1, characterized in that: The phase-change heat pipe includes a first pipe segment and a second pipe segment, the first pipe segment is inserted into the mounting hole, the second pipe segment is arranged on the upper end surface and connected to the first pipe segment, the flow hole is adjacent to the second pipe segment, and the phase-change medium is filled in the first pipe segment.

3. The rotor core according to claim 2, characterized in that: The second pipe section crosses above the center of the through-hole, and the outer diameter of the second pipe section is smaller than the diameter of the through-hole.

4. The rotor core according to claim 2, characterized in that: A spiral guide groove extending spirally in the axial direction is provided on the inner wall of the first pipe section, and the spiral pitch of the spiral guide groove gradually increases from the lower end surface toward the upper end surface.

5. The rotor core according to any one of claims 1 to 4, characterized in that: The axis of the mounting hole is inclined at an angle θ relative to the axis of the core body, wherein 3°≤θ≤5°.

6. The rotor core according to any one of claims 1 to 4, characterized in that: There are multiple mounting holes and flow holes, and the multiple mounting holes and flow holes are spaced apart along the circumference of the core body, wherein at least one mounting hole is adjacent to at least one flow hole to define a group of heat dissipation holes, and the multiple groups of heat dissipation holes are equally spaced apart along the circumference of the core body.

7. A compressor, characterized in that: The invention comprises a rotor core as described in any one of claims 1 to 6.

8. The compressor according to claim 7, characterized in that The compressor also includes a shell and a guide member, the rotor core is arranged in the shell, the guide member is arranged in the shell and is located below the rotor core, the guide member is provided with a first guide hole passing through the upper and lower sides thereof, the first guide hole is coaxial with the rotor core, and the diameter of the first guide hole is greater than the distance from the flow hole on the rotor core to the axis of the rotor core.

9. The compressor according to claim 8, characterized in that A flow guide tube extending toward the rotor core is disposed on the inner side of the flow guide member. The diameter of the flow guide tube gradually decreases from bottom to top. The first flow guide hole is disposed at one end of the flow guide tube with a small diameter.

10. The compressor according to any one of claims 8 to 9, characterized in that: The compressor also includes a stator, which is arranged in the shell and surrounds the outer side of the rotor core. The guide member is also provided with a second guide hole that passes through the upper and lower sides thereof. A plurality of the second guide holes are arranged around the outer side of the first guide hole, wherein the distance from the second guide hole to the axis of the rotor core is greater than the inner diameter of the stator and smaller than the outer diameter of the stator.

11. The compressor according to any one of claims 8 to 9, characterized in that: An oil pool is formed inside the shell below the guide member, an annular oil collecting groove is formed on the upper side of the guide member in the circumferential direction of the first guide hole, and an oil return notch is provided on the outer edge of the guide member, and the oil return notch connects the annular oil collecting groove and the oil pool.

Images