Driving system, fan and air conditioner

Abstract

The utility model discloses a driving system, fan and air conditioner relates to air conditioner technical field, wherein the driving system includes shell, stator, modulation end cover, support shaft, first rotor and second rotor, through setting up stator and support shaft fixed connection to shell, modulation end cover is connected to shell end portion, and the first rotor is connected to the second rotor. The first rotor is located in an installation cavity formed between the modulation end cover and the shell and rotationally connected to the supporting shaft, the second rotor is fixedly connected with the load, the supporting shaft penetrates out of the modulation end cover and is used for supporting the load, a rotating shaft of a motor in the related technology is omitted, torque distribution of the driving system is optimized, and the overall reliability of the driving system is improved. And the output torque of the second rotor can be improved, and the rotating speed of the second rotor can be reduced, so that the driving system can meet the requirements of small size and large torque, and the production cost is reduced. The driving system and the load are designed into an integrated structure, so that the whole structure of the driving system is compact, and the miniaturization design of the driving system is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a driving system, a fan and an air conditioner. Background Art

[0002] In the related art, the indoor unit of the air conditioner includes a crossflow impeller and a motor, and the rotating shaft of the motor is fixedly connected to the crossflow impeller by screws, thereby driving the crossflow impeller to rotate and realizing air circulation in the indoor environment. However, with the above solution, the overall size of the motor and the crossflow impeller is relatively large, and a large space is required in the indoor unit, which is not conducive to the compact design of the indoor unit. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a drive system with a compact structure, a small footprint, and the ability to ensure coaxiality with the load, improve the reliability and stability of the load operation, and reduce noise.

[0004] The utility model also provides a fan and an air conditioner with the driving system.

[0005] According to the first aspect of the present utility model, the driving system is used to drive a load to rotate, and includes: a housing;

[0006] A stator, fixedly connected to the housing;

[0007] A modulation end cap connected to the end of the housing, a mounting cavity is formed between the modulation end cap and the housing, and the modulation end cap includes a plurality of magnetic conductive blocks arranged at intervals around the rotation axis of the load;

[0008] A support shaft, one end of which is fixedly connected to the housing and the other end of which passes through the modulation end cover, the support shaft being configured to support the load;

[0009] a first rotor, rotatably connected to the support shaft and located in the mounting cavity, the first rotor comprising a first rotor core, and a plurality of first magnets and a plurality of second magnets connected to the first rotor core at both ends along the rotation axis, the plurality of first magnets facing the stator, and the plurality of second magnets facing the modulation end cover;

[0010] The second rotor is fixedly connected to the load, the second rotor comprises a second rotor core and a plurality of third magnets connected to one end of the second rotor core facing the modulation end cover, and the second rotor is configured to be rotatable relative to the first rotor.

[0011] The drive system according to the embodiment of the utility model has at least the following beneficial effects:

[0012] By setting the stator and the support shaft to be fixedly connected to the housing, the modulation end cover is connected to the end of the housing, the first rotor is located in the installation cavity formed between the modulation end cover and the housing, and is rotatably connected to the support shaft, the second rotor is fixedly connected to the load, the support shaft passes through the modulation end cover and is used to support the load, the rotating shaft of the motor in the related art is eliminated, the torque distribution of the drive system is optimized, and the overall reliability of the drive system is improved. The first rotor is provided with a plurality of first magnets facing the first stator and a plurality of second magnets facing the modulation end cover at both ends along the rotation axis, and the third magnet of the second rotor is connected to one end of the second rotor core facing the modulation end cover; when the stator is energized, the magnetic field generated by the stator and the magnetic field generated by the first magnet act to drive the first rotor to rotate; at this time, the second magnet of the first rotor rotates synchronously, and the magnetic field of the second magnet acts on the magnetic field of the third magnet after passing through the magnetic conductive block of the modulation end cover, thereby driving the second rotor and the load to rotate; the modulation end cover increases the magnetic field frequency of the second magnet acting on the third magnet, thereby increasing the output torque of the second rotor and reducing the speed of the second rotor, so that the drive system can achieve the requirements of small volume and large torque, and reduce production costs. By driving the second rotor to rotate through the first rotor and fixing the second rotor to the load, the drive system and the load are designed as an integrated structure, so that the overall structure of the drive system is compact, which is conducive to the miniaturization design of the drive system.

[0013] According to some embodiments of the present invention, the number of the third magnets is greater than the number of the second magnets.

[0014] According to some embodiments of the present invention, the number of the third magnets is 2P a , the number of the second magnet is 2P e , the number of the magnetic blocks is P f , satisfy: P f =P e +P a .

[0015] According to some embodiments of the present invention, the first rotor further includes a sleeve connected to the center of the first rotor core, and the drive system further includes a first bearing, which is installed between the support shaft and the sleeve.

[0016] According to some embodiments of the present invention, the drive system further includes a second bearing installed between the support shaft and the load.

[0017] According to some embodiments of the present invention, the first rotor further includes a magnetic isolation portion, which is disposed in the first rotor core and is configured to isolate a magnetic path passing through the first magnet and a magnetic path passing through the second magnet.

[0018] According to some embodiments of the present invention, the magnetic isolation part is made of magnetic isolation material; or

[0019] The magnetic isolation portion is a cavity.

[0020] According to some embodiments of the present utility model, the modulation end cover further comprises an injection molded body, the injection molded body and the plurality of magnetic conductive blocks are integrally injection molded, and the plurality of magnetic conductive blocks are evenly spaced around the rotation axis.

[0021] According to some embodiments of the utility model, the modulation end cover is provided with a center hole, the support shaft passes through the center hole and out of the installation cavity, and a sealing member is installed between the inner wall of the center hole and the support shaft.

[0022] According to some embodiments of the present invention, the stator includes a plurality of stator cores and a plurality of coils, the plurality of stator cores are arranged on the inner wall of the outer shell on the side opposite to the modulation end cover, the plurality of stator cores are evenly spaced around the rotation axis, the plurality of coils are wound around the outer sides of the corresponding stator cores, and the winding directions of the plurality of coils are parallel to the rotation axis.

[0023] The fan according to the embodiment of the second aspect of the utility model includes the drive system described in the above embodiment.

[0024] The fan according to the embodiment of the utility model has at least the following beneficial effects:

[0025] The drive system of the first embodiment is adopted, the drive system is fixedly connected to the housing by setting the stator and the support shaft, the modulation end cover is connected to the end of the housing, the first rotor is located in the installation cavity formed between the modulation end cover and the housing, and is rotatably connected to the support shaft, the second rotor is fixedly connected to the load, the support shaft passes through the modulation end cover and is used to support the load, the rotating shaft of the motor in the related art is eliminated, the torque distribution of the drive system is optimized, and the overall reliability of the drive system is improved. The first rotor is provided with a plurality of first magnets facing the first stator and a plurality of second magnets facing the modulation end cover at both ends along the rotation axis, and the third magnet of the second rotor is connected to one end of the second rotor core facing the modulation end cover; when the stator is energized, the magnetic field generated by the stator and the magnetic field generated by the first magnet act to drive the first rotor to rotate; at this time, the second magnet of the first rotor rotates synchronously, and the magnetic field of the second magnet acts on the magnetic field of the third magnet after passing through the magnetic conductive block of the modulation end cover, thereby driving the second rotor and the load to rotate; the modulation end cover increases the magnetic field frequency of the second magnet acting on the third magnet, thereby increasing the output torque of the second rotor and reducing the speed of the second rotor, so that the drive system can achieve the requirements of small volume and large torque, and reduce production costs. By driving the second rotor to rotate through the first rotor and fixing the second rotor to the load, the drive system and the load are designed as an integrated structure, so that the overall structure of the drive system is compact, which is conducive to the miniaturization design of the drive system.

[0026] The air conditioner according to the third embodiment of the utility model includes the fan described in the above embodiment.

[0027] The air conditioner according to the embodiment of the utility model has at least the following beneficial effects:

[0028] In the fan of the second aspect embodiment, the drive system of the fan is fixedly connected to the casing by arranging a stator and a support shaft, the modulation end cover is connected to the end of the casing, the first rotor is located in the installation cavity formed between the modulation end cover and the casing, and is rotatably connected to the support shaft, the second rotor is fixedly connected to the load, the support shaft passes through the modulation end cover and is used to support the load, the rotating shaft of the motor in the related technology is eliminated, the torque distribution of the drive system is optimized, and the overall reliability of the drive system is improved. The first rotor is provided with a plurality of first magnets facing the first stator and a plurality of second magnets facing the modulation end cap at both ends along the rotation axis, and the third magnet of the second rotor is connected to one end of the second rotor core facing the modulation end cap; when the stator is energized, the magnetic field generated by the stator and the magnetic field generated by the first magnet act to drive the first rotor to rotate; at this time, the second magnet of the first rotor rotates synchronously, and the magnetic field of the second magnet acts on the magnetic field of the third magnet after passing through the magnetic conductive block of the modulation end cap, thereby driving the second rotor and the load to rotate; the modulation end cap increases the magnetic field frequency of the second magnet acting on the third magnet, thereby increasing the output torque of the second rotor and reducing the speed of the second rotor, so that the drive system can achieve the requirements of small volume and large torque and reduce production costs. By driving the second rotor to rotate through the first rotor and fixing the second rotor to the load, the drive system and the load are designed as an integrated structure, so that the overall structure of the drive system is compact, which is conducive to the miniaturization design of the drive system.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0031] Figure 1 This is a partial structural schematic diagram of the connection between the drive system and the crossflow impeller of one embodiment of the utility model;

[0032] Figure 2 A partial structural cross-sectional view of the connection between the drive system and the crossflow impeller of one embodiment of the utility model;

[0033] Figure 3 This is a schematic structural diagram of a stator according to an embodiment of the utility model;

[0034] Figure 4 A cross-sectional view of a stator according to an embodiment of the utility model;

[0035] Figure 5 This is a schematic structural diagram of a first rotor in one embodiment of the utility model;

[0036] Figure 6A schematic structural diagram of the first rotor from another perspective of an embodiment of the utility model;

[0037] Figure 7 This is a schematic structural diagram of a modulation end cover in one embodiment of the utility model;

[0038] Figure 8 This is a schematic structural diagram of a second rotor in one embodiment of the utility model;

[0039] Fig. 9 A magnetic circuit diagram of a simplified structure of a drive system according to an embodiment of the utility model.

[0040] Figure Number:

[0041] Drive system 1000;

[0042] Housing 100; mounting cavity 110; modulation end cover 120; magnetic conductive block 121; injection molding body 122; center hole 123; blocking member 124; support shaft 130; second bearing 131; mounting structure 140;

[0043] first rotor 200; first rotor core 210; first magnet 220; second magnet 230; sleeve 240; first bearing 250; first air gap 260; second air gap 270;

[0044] The second rotor 300; the second rotor core 310; the sleeve section 311; the third magnet 320; the third air gap 330;

[0045] stator 400; stator core 410; coil 420;

[0046] Crossflow impeller 500. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0050] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0051] Reference Figure 1 As shown, a drive system 1000 of an embodiment of the utility model is used to drive a load to rotate. The load may be a wind wheel, such as an axial flow wind wheel, a crossflow wind wheel, a centrifugal wind wheel, etc., or the load may also be other devices that need to rotate. For the convenience of explanation, the following description will take the application of the drive system 1000 to the indoor unit of the air conditioner to drive the crossflow wind wheel 500 as an example. Figure 2 As shown, the drive system 1000 includes a housing 100, a stator 400, a modulation end cover 120, a support shaft 130, a first rotor 200 and a second rotor 300. The housing 100 is provided with a mounting structure 140, which is generally fixedly connected to the outside of the housing 100 and is used to fix the drive system 1000 to the base of the indoor unit. The housing 100 and the mounting structure 140 can be integrally injection molded by BMC material. The stator 400 is fixedly connected to the inner cavity formed by the housing 100, and the connection method of the stator 400 and the housing 100 can be integrally injection molded. As an alternative embodiment, the stator 400 can also be fixedly connected to the housing 100 by bonding, clamping, fastener connection, etc. The modulation end cover 120 is connected to the end of the housing 100, and an installation cavity 110 is formed between the modulation end cover 120 and the housing 100. The stator 400 is located in the installation cavity 110, and the stator 400 and the modulation end cover 120 are arranged at intervals. The modulation end cover 120 includes a plurality of magnetic conductive blocks 121 arranged around the rotation axis of the load. The magnetic conductive blocks 121 may be made of an iron core and are used to conduct the magnetic circuit.

[0052] Continue to refer to Figure 2As shown, one end of the support shaft 130 is fixedly connected to the housing 100, and the other end of the support shaft 130 passes through the modulation end cover 120. The support shaft 130 is configured to support a load, such as supporting the crossflow impeller 500, that is, the support shaft 130 does not rotate, and the crossflow impeller 500 rotates relative to the support shaft 130. The first rotor 200 is rotatably connected to the support shaft 130 and is located in the installation cavity 110. The first rotor 200 and the stator 400 are spaced apart, and the first rotor 200 and the modulation end cover 120 are spaced apart. The first rotor 200 includes a first rotor core 210, a plurality of first magnets 220 and a plurality of second magnets 230. The plurality of first magnets 220 are arranged around the rotation axis and connected to one end of the first rotor core 210 facing the stator 400. The plurality of second magnets 230 are arranged around the rotation axis and connected to one end of the first rotor core 210 facing the modulation end cover 120, that is, the first magnets 220 and the second magnets 230 are respectively connected to the two ends of the first rotor core 210 along the rotation axis. The second rotor 300 is fixedly connected to the load, and the connection method can be bonding, fastener connection or integral injection molding. The second rotor 300 and the modulation end cover 120 are arranged at intervals. The second rotor 300 includes a second rotor core 310 and a plurality of third magnets 320. The plurality of third magnets 320 are arranged around the rotation axis and connected to one end of the second rotor core 310 facing the modulation end cover 120. The second rotor 300 is configured to be rotatable relative to the first rotor 200.

[0053] It is understandable that by adopting the above scheme, referring to Fig. 9 As shown, Fig. 9 The dotted line in represents the direction of the magnetic circuit, and the magnetic field of the drive system 1000 is distributed along the axial direction. When the stator 400 is powered on, the magnetic field generated by the stator 400 interacts with the magnetic field generated by the first magnet 220, so that the first rotor 200 rotates; when the first rotor 200 rotates, it drives the second magnet 230 to rotate synchronously, and the magnetic field of the second magnet 230 acts on the magnetic field of the third magnet 320 after passing through the magnetic conductive block 121 of the modulation end cover 120, thereby driving the second rotor 300 to rotate, and the second rotor 300 drives the crossflow impeller 500 to rotate synchronously. The modulation end cover 120 is used to increase the frequency of the magnetic field of the second magnet 230 acting on the third magnet 320, so as to increase the output torque of the second rotor 300. Therefore, the solution of using the first rotor 200 to drive the second rotor 300 to rotate eliminates the rotating shaft of the motor in the related art, and the first rotor 200 and the second rotor 300 are non-contact designs, which improves the overall reliability of the drive system 1000; and the second rotor 300 is fixedly connected to the load, that is, the drive system 1000 and the load are an integrated structure, so that the overall structure of the drive system 1000 is compact, which is conducive to the miniaturized design of the drive system 1000, and can drive a larger load with a smaller volume, thereby reducing production costs.

[0054] Reference Figure 3 and Figure 4 As shown, in the embodiment of the utility model, the stator 400 includes a plurality of stator cores 410 and a plurality of coils 420, and the plurality of stator cores 410 are evenly arranged around the rotation axis and are arranged on the inner wall of the housing 100 on the side opposite to the modulation end cover 120. The plurality of coils 420 are wound around the outer side of the corresponding rotor core, and the winding direction of the plurality of coils 420 is parallel to the rotation axis. It should be noted that the winding direction of the coil 420 refers to the moving direction of each coil 420 when it is wound, so the direction of the magnetic field generated by the coil 420 is along the axial direction, and the magnetization direction of the first magnet 220 is also axial, so that the magnetic field of the first magnet 220 and the magnetic field of the coil 420 can interact with each other to reduce the radial size of the drive system 1000, and the distance required for each component of the drive system 1000 in the axial direction is shorter, so the structure is more compact, which is conducive to the miniaturization design of the drive system 1000.

[0055] Reference Fig. 9 As shown, Fig. 9 The dotted line in represents the direction of the magnetic circuit. In the embodiment of the present invention, when the magnetic circuit of the first rotor core 210 is not saturated, the magnetic field of the first magnet 220 and the magnetic field of the second magnet 230 can be prevented from interfering with each other, thereby improving the overall reliability of the drive system 1000. In the embodiment of the present invention, the first rotor 200 also includes a magnetic isolation portion, which is disposed in the first rotor core 210 and is configured to isolate the magnetic circuit passing through the first magnet 220 and the magnetic circuit passing through the second magnet 230, further preventing the magnetic fields of the first magnet 220 and the second magnet 230 from interfering with each other, thereby improving the reliability of the first rotor 200. The magnetic isolation portion can be made of a magnetic isolation material. For example, the magnetic isolation portion is a plate-like structure made of a non-magnetic material and is nested in the first rotor core 210, thereby separating the first rotor core 210 into two cores spaced apart along its axial direction, and the two cores are respectively fixedly connected to the first magnet 220 and the second magnet 230. As an alternative embodiment, the magnetic isolation part can also be a cavity, which separates the first rotor core 210 into two cores. Since the magnetic permeability of air is low, it can be used for magnetic isolation. For example, the two cores can be fixed by injection molding and a cavity can be formed between the two cores.

[0056] Reference Figure 6 , Figure 7 and Figure 8 As shown, in the embodiment of the present invention, the number of the third magnets 320 is 2P a , the number of the second magnets 230 is 2P e , the number of magnetic blocks 121 is P f , satisfy: P f =P e +P aUnderstandably, P a represents the number of pole pairs of the third magnet 320, P e P represents the number of pole pairs of the second magnet 230. f =P e +P a The positive sign in represents the rotation direction of the first rotor 200 and the second rotor 300, that is, the rotation direction of the first rotor 200 is opposite to the rotation direction of the second rotor 300. For example, the number of pole pairs P of the third magnet 320 is a is 5, the pole pair number P of the second magnet 230 e is 1, satisfying 6=1+5, that is, the number of the magnetic conductive blocks 121 is 6, and the rotation direction of the first rotor 200 is opposite to that of the second rotor 300 .

[0057] It should be noted that the modulation end cap 120 has a magnetic conductive part and a non-magnetic conductive part, and the magnetic conductive part is a magnetic conductive block 121. When the magnetic field generated by the second magnet 230 passes through the modulation end cap 120, it can only pass through the magnetic conductive block 121. Therefore, by reasonably designing the number of magnetic conductive blocks 121, that is, P f =P e +P a , the frequency of the magnetic field when the second magnet 230 and the third magnet 320 act can be changed. For example, a plurality of second magnets 230 form a dipole magnetic field, and the dipole magnetic field becomes a quadrupole magnetic field after passing through the modulation end cap 120, that is, the frequency of the magnetic field after being modulated by the modulation end cap 120 increases, which can improve the output torque of the second rotor 300 and meet the performance requirements when driving the crossflow impeller 500 to rotate.

[0058] Reference Figure 6 and Figure 8 As shown, in the embodiment of the present invention, the pole pair number P of the third magnet 320 is a Greater than the pole pair number P of the second magnet 230 e , that is, the number of the third magnets 320 is 2P a Greater than the number 2P of the second magnets 230 e It should be noted that the torque and speed satisfy the following relationship:

[0059] T a / T e =P a / P e

[0060] n a / n e =-P e / P a

[0061] Among them, T e represents the torque of the first rotor 200, Ta represents the torque of the second rotor 300, n e represents the rotation speed of the first rotor 200, n a represents the rotation speed of the second rotor 300, n a / n e =-P e / P a The negative sign in indicates that the first rotor 200 and the second rotor 300 rotate in opposite directions. From the above formula, it can be seen that the torque is proportional to the number of pole pairs, and the speed is inversely proportional to the number of pole pairs. a Greater than the pole pair number P of the second magnet 230 e , that is, the speed of the second rotor 300 is reduced, but the torque is increased. Therefore, the torque output by the first rotor 200 can be multiplied to the second rotor 300, so that the small-volume drive system 1000 drives the large-volume crossflow impeller 500, which can meet the requirements of miniaturization and performance at the same time, and the reliability of the drive system 1000 is higher.

[0062] Reference Figure 2 and Figure 5 As shown, in the embodiment of the utility model, the first rotor 200 further includes a sleeve 240 connected to the center of the first rotor core 210, and the sleeve 240 is sleeved on the support shaft 130 and spaced from the support shaft 130. The drive system 1000 further includes a first bearing 250, which is installed between the support shaft 130 and the sleeve 240, so that the sleeve 240 can rotate relative to the support shaft 130, reduce the friction of the rotation of the first rotor 200, and improve the service life of the first rotor 200. For example, the outer ring of the first bearing 250 and the inner side wall of the sleeve 240 are interference fit, and the inner ring of the first bearing 250 and the outer wall of the support shaft 130 are interference fit, thereby limiting the relative position of the first bearing 250, the sleeve 240 and the support shaft 130. Among them, there can be multiple first bearings 250, for example, two, and the two first bearings 250 are spaced apart and sleeved on the support shaft 130 and are both located in the shaft sleeve 240. By setting two first bearings 250, the stability and reliability of the support shaft 130 can be further improved, and the first rotor 200 can effectively reduce the occurrence of unstable operation, vibration and other adverse conditions.

[0063] Reference Figure 2As shown, in the embodiment of the utility model, the drive system 1000 further includes a second bearing 131, which is installed between the support shaft 130 and the load. For example, a sleeve section 311 is provided at the center of the second rotor 300, and the sleeve section 311 can be integrally formed with the second rotor core 310. The sleeve section 311 is cylindrical and sleeved on the support shaft 130. The sleeve section 311 is inserted into the crossflow impeller 500, and the second bearing 131 is provided between the sleeve section 311 and the support shaft 130. The outer ring of the second bearing 131 and the sleeve section 311 are interference fit, and the inner ring of the second bearing 131 and the outer wall of the support shaft 130 are interference fit to fix the relative position between the second bearing 131 and the support shaft 130. The second bearing 131 has the function of axial limiting and radial load support, and can reduce the friction when the crossflow impeller 500 and the second rotor 300 rotate synchronously, thereby improving the service life of the second rotor 300. As an alternative implementation, in addition to the bearings between the support shaft 130 and the load, a sleeve, a hemisphere or other supporting member may be used to replace the second bearing 131 . The appropriate solution is selected according to the actual situation.

[0064] Reference Figure 7 As shown, in the embodiment of the utility model, the modulation end cover 120 also includes an injection molding body 122, and the injection molding body 122 and a plurality of magnetic conductive blocks 121 are integrally injection molded, and the plurality of magnetic conductive blocks 121 are evenly spaced around the rotation axis. Among them, the housing 100 can also be molded by injection molding, so it can be integrally injection molded with the injection molding body 122 of the modulation end cover 120 during the injection molding stage to improve production efficiency. The magnetic conductive block 121 is partially exposed at the end of the injection molding body 122 along its axial direction; or, the magnetic conductive block 121 is completely embedded in the injection molding body 122. When the magnetic conductive block 121 is completely embedded in the injection molding body 122, the injection molding body 122 plays a protective role for the magnetic conductive block 121, such as dustproof, waterproof, and anti-corrosion, so as to improve the reliability of the magnetic conductive block 121. Therefore, the injection molding body 122 plays the role of connecting and fixing the magnetic conductive block 121, and also has a certain protective effect.

[0065] Reference Figure 2 and Figure 7As shown, in the embodiment of the utility model, the modulation end cover 120 is provided with a center hole 123, and the support shaft 130 passes through the center hole 123 and is outside the installation cavity 110, and a blocking member 124 is installed between the inner wall of the center hole 123 and the support shaft 130, so that the installation cavity 110 constitutes a closed space. Among them, the blocking member 124 can be a rubber ring, a silicone ring and other structures. Since the first rotor 200 is located in the installation cavity 110, and the stator 400 is located on the inner wall of the housing 100 relative to the modulation end cover 120, the protection effect of the first rotor 200 can be improved, and water and dust can be prevented from entering the installation cavity 110, which may cause the first rotor 200 and the stator 400 to fail, and the overall reliability of the drive system 1000 can be improved.

[0066] Reference Figure 2 , Figure 5 and Figure 6 As shown, in the embodiment of the utility model, a plurality of first magnets 220 are evenly spaced around the rotation axis and a first air gap 260 is formed between the first magnets 220 and the stator 400; a plurality of second magnets 230 are evenly spaced around the rotation axis and a second air gap 270 is formed between the second magnets 230 and the modulation end cover 120; a plurality of third magnets 320 are evenly spaced around the rotation axis and a third air gap 330 is formed between the third magnets 320 and the modulation end cover 120. It can be understood that by providing the first air gap 260, the second air gap 270 and the third air gap 330, the first rotor 200 and the second rotor 300 are prevented from wearing due to contact with the modulation end cover 120 and the stator 400 during the rotation process, so as to improve the service life of the first rotor 200 and the second rotor 300.

[0067] A wind turbine of an embodiment of the utility model comprises a wind wheel and a driving system 1000 of the above embodiment, and the driving system 1000 is used to drive the wind wheel to rotate. The wind turbine of the utility model embodiment adopts the driving system 1000 of the above embodiment, and the driving system 1000 is fixedly connected to the housing 100 by setting a stator 400 and a support shaft 130, and the modulation end cover 120 is connected to the end of the housing 100, and the first rotor 200 is located in the installation cavity 110 formed between the modulation end cover 120 and the housing 100, and is rotatably connected to the support shaft 130, and the second rotor 300 is fixedly connected to the load, and the support shaft 130 passes through the modulation end cover 120 and is used to support the load, thereby eliminating the rotating shaft of the motor in the related art, optimizing the torque distribution of the driving system 1000, and improving the overall reliability of the driving system 1000. The first rotor 200 is provided with a plurality of first magnets 220 facing the first stator 400 and a plurality of second magnets 230 facing the modulation end cover 120 at both ends along the rotation axis, and the third magnet 320 of the second rotor 300 is connected to one end of the second rotor 300 core facing the modulation end cover 120; when the stator 400 is energized, the magnetic field generated by the stator 400 and the magnetic field generated by the first magnet 220 act to drive the first rotor 200 to rotate; at this time, the second magnet 230 of the first rotor 200 rotates synchronously, and the magnetic field of the second magnet 230 acts on the magnetic field of the third magnet 320 after passing through the magnetic conductive block 121 of the modulation end cover 120, thereby driving the second rotor 300 and the load to rotate; the modulation end cover 120 increases the frequency of the magnetic field of the second magnet 230 acting on the third magnet 320, thereby increasing the output torque of the second rotor 300 and reducing the speed of the second rotor 300, so that the drive system 1000 can achieve the requirements of small volume and large torque and reduce production costs. By driving the second rotor 300 to rotate through the first rotor 200 and fixing the second rotor 300 to the load, the drive system 1000 and the load are designed as an integrated structure, so that the overall structure of the drive system 1000 is compact, which is conducive to the miniaturized design of the drive system 1000.

[0068] Since the fan of the embodiment of the utility model adopts all the technical solutions of the driving system 1000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0069] An air conditioner of an embodiment of the utility model comprises a fan of the above embodiment. The air conditioner of the embodiment of the utility model adopts the fan of the above embodiment, the drive system 1000 of the fan is fixedly connected to the housing 100 by setting a stator 400 and a support shaft 130, the modulation end cover 120 is connected to the end of the housing 100, the first rotor 200 is located in the installation cavity 110 formed between the modulation end cover 120 and the housing 100, and is rotatably connected to the support shaft 130, the second rotor 300 is fixedly connected to the load, the support shaft 130 passes through the modulation end cover 120 and is used to support the load, the rotating shaft of the motor in the related art is eliminated, the torque distribution of the drive system 1000 is optimized, and the overall reliability of the drive system 1000 is improved. The first rotor 200 is provided with a plurality of first magnets 220 facing the first stator 400 and a plurality of second magnets 230 facing the modulation end cover 120 at both ends along the rotation axis, and the third magnet 320 of the second rotor 300 is connected to one end of the second rotor 300 core facing the modulation end cover 120; when the stator 400 is energized, the magnetic field generated by the stator 400 and the magnetic field generated by the first magnet 220 act to drive the first rotor 200 to rotate; at this time, the second magnet 230 of the first rotor 200 rotates synchronously, and the magnetic field of the second magnet 230 acts on the magnetic field of the third magnet 320 after passing through the magnetic conductive block 121 of the modulation end cover 120, thereby driving the second rotor 300 and the load to rotate; the modulation end cover 120 increases the frequency of the magnetic field of the second magnet 230 acting on the third magnet 320, thereby increasing the output torque of the second rotor 300 and reducing the speed of the second rotor 300, so that the drive system 1000 can achieve the requirements of small volume and large torque and reduce production costs. By driving the second rotor 300 to rotate through the first rotor 200 and fixing the second rotor 300 to the load, the drive system 1000 and the load are designed as an integrated structure, so that the overall structure of the drive system 1000 is compact, which is conducive to the miniaturized design of the drive system 1000.

[0070] Since the air conditioner of the embodiment of the utility model adopts all the technical solutions of the fan of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0071] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A drive system for driving a load to rotate, characterized in that: include: shell; A stator, fixedly connected to the housing; A modulation end cap connected to the end of the housing, a mounting cavity is formed between the modulation end cap and the housing, and the modulation end cap includes a plurality of magnetic conductive blocks arranged at intervals around the rotation axis of the load; A support shaft, one end of which is fixedly connected to the housing and the other end of which passes through the modulation end cover, the support shaft being configured to support the load; a first rotor, rotatably connected to the support shaft and located in the mounting cavity, the first rotor comprising a first rotor core, and a plurality of first magnets and a plurality of second magnets connected to the first rotor core at both ends along the rotation axis, the plurality of first magnets facing the stator, and the plurality of second magnets facing the modulation end cover; The second rotor is fixedly connected to the load, the second rotor comprises a second rotor core and a plurality of third magnets connected to one end of the second rotor core facing the modulation end cover, and the second rotor is configured to be rotatable relative to the first rotor.

2. The drive system according to claim 1, characterized in that: The number of the third magnets is greater than the number of the second magnets.

3. The drive system according to claim 2, characterized in that: The number of the third magnets is 2P a , the number of the second magnet is 2P e , the number of the magnetic blocks is P f , satisfy: P f =P e +P a .

4. The drive system according to claim 1, characterized in that: The first rotor further includes a sleeve connected to the center of the first rotor core, and the drive system further includes a first bearing installed between the support shaft and the sleeve.

5. The drive system according to claim 1, characterized in that: The drive system also includes a second bearing mounted between the support shaft and the load.

6. The driving system according to claim 1, characterized in that: The first rotor further includes a magnetic isolation portion, which is disposed in the first rotor core and is configured to isolate a magnetic path passing through the first magnet and a magnetic path passing through the second magnet.

7. The driving system according to claim 6, characterized in that: The magnetic isolation part is made of magnetic isolation material; or The magnetic isolation portion is a cavity.

8. The driving system according to claim 1, characterized in that: The modulation end cover also includes an injection molded body, the injection molded body and the plurality of magnetic conductive blocks are integrally injection molded, and the plurality of magnetic conductive blocks are evenly spaced and arranged around the rotation axis.

9. The drive system according to claim 1 or 8, characterized in that: The modulation end cover is provided with a central hole, the support shaft passes through the central hole and out of the installation cavity, and a blocking piece is installed between the inner wall of the central hole and the support shaft.

10. The driving system according to claim 1, characterized in that: The stator includes a plurality of stator cores and a plurality of coils. The plurality of stator cores are arranged on the inner wall of the outer shell on the side opposite to the modulation end cover. The plurality of stator cores are evenly spaced around the rotation axis. The plurality of coils are wound around the outer sides of the corresponding stator cores. The winding directions of the plurality of coils are parallel to the rotation axis.

11. A fan, characterized in that: It comprises a wind wheel and a driving system according to any one of claims 1 to 10, wherein the driving system is used for driving the wind wheel to rotate.

12. An air conditioner, characterized in that: Including the fan as claimed in claim 11.

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