Magnetic suspension fan heat dissipation device, magnetic suspension motor and magnetic suspension equipment

Abstract

The invention relates to a magnetic suspension fan heat dissipation device, a magnetic suspension motor and magnetic suspension equipment, the magnetic suspension motor comprises a magnetic suspension stator and a magnetic suspension rotor, the magnetic suspension fan heat dissipation device comprises a flow guide cover and a magnetic suspension fan, and the flow guide cover comprises a base and a wind shielding side wall; the magnetic suspension fan comprises a fan stator and a fan rotor, the fan stator is fixedly arranged on the base, the fan rotor is movably arranged on the side, facing the magnetic suspension motor, of the base, the fan rotor comprises a rotor body and at least one fan impeller arranged on the rotor body, and a ventilation opening communicated with the fan impeller is formed in the side, back to the magnetic suspension motor, of the base. And the fan stator drives the rotor main body and the at least one fan impeller to rotate and suspend in a non-contact manner so as to carry out air-cooling heat dissipation on the casing of the magnetic suspension motor. The magnetic suspension fan heat dissipation device can be used after being assembled with a shell of a magnetic suspension motor to be subjected to heat dissipation in a butt joint mode, the structure is compact, the fan stator drives the fan rotor to dissipate heat in a non-contact mode, good heat dissipation is achieved, meanwhile, mechanical abrasion is avoided, particles are not generated, and the heat dissipation requirements of special working environments such as high cleanliness can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic levitation motors, and in particular to a magnetic levitation fan heat dissipation device, a magnetic levitation motor, and a magnetic levitation device. Background Art

[0002] A magnetic levitation motor is a magnetic levitation rotary driver that uses magnetic force to suspend the rotor so that there is no mechanical contact between the rotor and the stator. The magnetic levitation motor can be a magnetic bearing motor, a bearingless motor, a bearingless wafer motor, etc.

[0003] A magnetic bearing motor, also known as a magnetic bearing, is a motor that combines a rotary drive motor with an axial magnetic bearing or / and a radial magnetic bearing or / and a shaft diameter hybrid magnetic bearing, etc., rather than integrating them.

[0004] A bearingless motor is a motor that integrates the functions of motor rotation and suspension. On the windings that generate the rotary drive magnetic field of the bearingless motor, an additional set of windings is wound to generate an excitation magnetic field. The interaction between the two magnetic fields breaks the original balanced distribution of the drive magnetic field, thereby generating a radial force acting on the rotor. The suspension of the rotor is achieved by controlling the radial force in the motor. Compared with a magnetic bearing motor, the magnetic levitation windings of a bearingless motor are wound on the stator, without occupying extra space, and to a certain extent, overcome the disadvantages of large volume and high cost of magnetic bearings. In the early stage, in order to achieve the suspension of the motor rotor in five degrees of freedom, generally two bearingless motors and an axial magnetic bearing were required.

[0005] A bearingless wafer motor is a special bearingless motor that inherits the advantages of a bearingless motor, and the ratio of the axial length to the diameter of the rotor is very small, showing a wafer shape. The axial magnetic bearing is omitted, and the rotation of the rotor and the active suspension in the radial direction are realized by using bearingless technology. The passive suspension of the other three degrees of freedom except for the radial and rotor rotation degrees of freedom is realized by using a magnetic circuit composed of a mechanical structure. It has the characteristics of high cleanliness, no precipitation, no particles, no dynamic seal, and excellent performance, and has good application prospects in ultra-clean drive fields such as biochemistry, medicine, and semiconductor manufacturing.

[0006] The magnetic levitation motor includes a magnetic levitation stator and a magnetic levitation rotor. The magnetic levitation rotor can be an integral rotor. For example, in the application of a magnetic levitation pump, the magnetic levitation rotor is both the rotor of the magnetic levitation motor and the rotor of the pump, and can be, for example, a permanent magnet rotor, a short-circuit cage rotor, or a reluctance rotor. The magnetic levitation stator is designed as a bearing and a drive stator, and generally includes a magnetic conductive ring, several stator teeth, and winding coils wound around the stator teeth. For example, in the application of a magnetic levitation pump, the magnetic levitation stator is both the stator for rotational drive and the stator for magnetic levitation. A magnetic field can be generated by the winding coils of the stator. On the one hand, this magnetic field exerts a torque on the rotor, thereby realizing its rotation around the desired rotation axis. On the other hand, a levitation force is exerted, and this levitation force can be applied to the rotor as needed so that its radial position can be actively controlled or adjusted. Therefore, the three degrees of freedom of the rotor, namely its rotation and its radial position (two degrees of freedom), can be actively adjusted. Regarding the other three degrees of freedom, namely its position in the axial direction and its inclination relative to the radial plane perpendicular to the desired rotation axis (two degrees of freedom), the rotor is passively magnetically levitated or stabilized by magnetic resistance. Without a separate magnetic bearing and with the rotor completely magnetically levitated, the bearingless motor gets its name.

[0007] The magnetic levitation motor can be assembled with fittings of different functions to become a magnetic levitation device for different application requirements. In one embodiment, the magnetic levitation device can be configured as a magnetic levitation pump. In the application of the magnetic levitation pump, the magnetic levitation pump includes a magnetic levitation motor and a pump head. The pump head includes a pump casing and a rotor impeller disposed within the pump casing. The magnetic levitation rotor is both the rotor of the magnetic levitation motor and a part of the rotor impeller of the pump, and can be, for example, a permanent magnet rotor, a short-circuit cage rotor, or a reluctance rotor. The magnetic levitation stator is configured to drive the rotor impeller to rotate and levitate. In another embodiment, the magnetic levitation device is configured as a magnetic levitation mixer. In the application of the magnetic levitation mixer, the magnetic levitation mixer includes a magnetic levitation motor and a mixing device. The mixing device includes a mixing container and a rotor mixing head disposed within the mixing container. The magnetic levitation rotor is both the rotor of the magnetic levitation motor and a part of the rotor mixing head of the mixing device. The magnetic levitation stator is configured to drive the rotor mixing head to rotate and levitate.

[0008] Currently, the magnetic levitation motors used in products such as magnetic levitation pumps and magnetic levitation mixers mainly adopt the air-cooled heat dissipation method. A cooling fan is configured on the base of the magnetic levitation motor housing. Traditional cooling fans have mechanical wear, generate particles, have low cleanliness, and do not have corrosion resistance, and cannot work in explosion-proof areas, resulting in the problem of fan heat dissipation for magnetic levitation motors in some special working environments (such as areas with flammable and explosive gases and dust, strong acid and strong base environments, and environments with high cleanliness requirements, etc.). Therefore, there is an urgent need to design a magnetic levitation heat dissipation solution that can meet the heat dissipation requirements of special working environments such as high cleanliness. Summary of the Invention

[0009] To solve the above technical problems, the present invention provides a magnetic levitation fan heat dissipation device, a magnetic levitation motor and a magnetic levitation device, which can achieve good heat dissipation while having no mechanical wear, no generation of particles, and can meet the heat dissipation requirements of special working environments such as high cleanliness.

[0010] According to one aspect of the present invention, there is provided a magnetic levitation fan heat dissipation device, including a guide cover and a magnetic levitation fan. The guide cover includes a base and a windward side wall extending from the base in a first direction; the magnetic levitation fan includes a fan stator and a fan rotor. The fan stator is fixedly arranged on the base, and the fan rotor is movably arranged on one side of the base facing the first direction. The fan rotor includes a rotor main body and at least one fan impeller arranged on the rotor main body. A ventilation opening communicating with the fan impeller is arranged on the side of the base facing away from the first direction. The fan stator drives the rotor main body and the at least one fan impeller to rotate and levitate in a non-contact manner to generate a heat dissipation air flow flowing towards the windward side wall.

[0011] Further, the fan rotor is configured as an outer rotor, and the at least one fan impeller includes a centrifugal impeller A. The centrifugal impeller A includes a plurality of centrifugal blades A for generating centrifugal air flow, and the centrifugal blades A are fixedly connected to the rotor main body.

[0012] Further, a groove A is formed on the side of the base facing the first direction. A diversion air duct A is formed between the groove A and the windward side wall. The centrifugal blades A are arranged in the groove A and the centrifugal blades A extend towards the diversion air duct A.

[0013] Further, a first back plate is arranged at one end of the rotor main body facing the first direction, and one side of the centrifugal blades A facing the first direction is mounted on the first back plate.

[0014] Further, the fan rotor further includes a support ring. The centrifugal blades A are fixedly connected between the first back plate and the support ring. The support ring and the rotor main body are fixedly connected through a support member. A cavity is formed between the radially inner end of the centrifugal blades A and the rotor main body. The ventilation opening is arranged at the bottom of the groove A and communicates with the cavity.

[0015] Further, a first through hole penetrating in the first direction is formed on the fan stator, and the ventilation opening communicates with the first through hole.

[0016] Further, a first diversion cylinder extending towards the first direction is arranged on the fan stator, and the first through hole is arranged opposite to the internal space of the first diversion cylinder.

[0017] Further, the radially inner end of the centrifugal blade A is fixedly connected to the outer peripheral side of the rotor body; or a second back plate is provided at one end of the rotor body facing away from the first direction, and one side of the centrifugal blade A facing away from the first direction is mounted on the second back plate.

[0018] Further, a second guide cylinder extending toward the first direction is provided on the fan rotor, and the first through hole is disposed opposite to the internal space of the second guide cylinder.

[0019] Further, the radially inner end of the centrifugal blade A is fixedly connected to the outer peripheral side of the rotor body; or a second back plate is provided at one end of the rotor body facing away from the first direction, and one side of the centrifugal blade A facing away from the first direction is mounted on the second back plate.

[0020] Further, the at least one fan impeller further includes an axial flow impeller A, and the axial flow impeller A includes a plurality of axial flow blades A for generating axial air flow, and the axial flow blades A are disposed in the second guide cylinder.

[0021] Further, a third back plate is provided in the middle of the rotor body, one side of the centrifugal blade A facing the first direction is mounted on the third back plate, and an auxiliary ventilation opening is further provided on the base, and the auxiliary ventilation opening is communicated with the centrifugal blade A.

[0022] Further, the fan stator includes a plurality of stator teeth A and a plurality of control windings A. The stator teeth A are in a straight line shape, and the plurality of stator teeth A are equally spaced in the circumferential direction of the same radial plane and one ends of the plurality of stator teeth A facing the fan rotor are arranged on the same circumference; the fan stator further includes a magnetic conduction column A, and one ends of the plurality of stator teeth A facing away from the fan rotor are magnetically connected to the magnetic conduction column A, and the control winding A is sleeved on the stator teeth A.

[0023] Further, the fan rotor is configured as an inner rotor, the at least one fan impeller includes a centrifugal impeller B, and the centrifugal impeller B includes a plurality of centrifugal blades B for generating centrifugal air flow, and the centrifugal blades B are fixedly connected to the rotor body.

[0024] Further, a groove B is formed on one side of the base facing the first direction, a diversion air duct B is formed between the groove B and the wind shielding side wall, the centrifugal blade B is disposed in the groove B and the centrifugal blade B extends toward the diversion air duct B.

[0025] Further, a back plate A is provided at one end of the rotor body facing the first direction, and one side of the centrifugal blade B facing away from the first direction is mounted on the back plate A.

[0026] Further, the at least one fan impeller further includes an axial-flow impeller B. The axial-flow impeller B includes a plurality of axial-flow blades B for generating axial air flow. A second through-hole penetrating in the first direction is formed on the rotor main body. The ventilation opening is communicated with the second through-hole, and the axial-flow blades B are arranged in the second through-hole.

[0027] Further, a guide cylinder A extending in the first direction is provided on the rotor main body, and the second through-hole is disposed opposite to the internal space of the guide cylinder A.

[0028] Further, the fan stator includes a plurality of stator teeth B and a plurality of control windings B. The stator teeth B are in a straight shape. The plurality of stator teeth B are equally spaced in the circumferential direction, and one end of the plurality of stator teeth B facing the fan rotor encloses a rotor cavity. The fan stator further includes a magnetic conductive ring B. One end of the plurality of stator teeth B facing away from the fan rotor is magnetically connected to the magnetic conductive ring B, and the control winding B is sleeved on the stator teeth B.

[0029] Further, the fan stator further includes an annular bracket. The annular bracket is fixedly connected to the base, and the magnetic conductive ring B is fixed to the base through the annular bracket.

[0030] Further, the fan rotor is configured as an outer rotor. The at least one fan impeller includes a centrifugal impeller C. The centrifugal impeller C includes a plurality of centrifugal blades C for generating centrifugal air flow. A third back plate is provided at one end of the rotor main body facing the first direction. One side of the centrifugal blades facing away from the first direction is mounted on the third back plate. A third through-hole penetrating in the first direction is formed on the fan stator. The ventilation opening passes through the third through-hole and is communicated with the middle of the centrifugal impeller C. A groove C is formed on one side of the base facing the first direction. A diversion air duct C is formed between the groove C and the wind shielding side wall. The centrifugal blades C are arranged in the groove C and the centrifugal blades C extend towards the diversion air duct C.

[0031] Further, the fan stator includes a plurality of stator teeth C and a plurality of control windings C. The stator teeth C are in a straight shape. The plurality of stator teeth C are equally spaced in the circumferential direction, and one end of the plurality of stator teeth C facing the fan rotor is arranged on the same circumference. The fan stator further includes a magnetic conductive ring C. One end of the plurality of stator teeth C facing away from the fan rotor is magnetically connected to the magnetic conductive ring C, and the control winding C is sleeved on the stator teeth C.

[0032] Further, a stator housing is further included. The fan stator is disposed in the stator housing and fixed to the base through the stator housing.

[0033] According to another aspect of the present invention, a magnetic levitation motor is provided, which includes the above-mentioned magnetic levitation fan heat dissipation device.

[0034] Furthermore, the magnetic levitation motor includes a magnetic levitation stator and a magnetic levitation rotor, and the magnetic levitation stator is configured to drive the magnetic levitation rotor to levitate and rotate in a non-contact manner.

[0035] Furthermore, the magnetic levitation stator includes a housing and a stator assembly. The housing includes an outer cylinder, an inner cylinder, and a bottom plate connected between the outer cylinder and the inner cylinder. The stator assembly is disposed in an annular space surrounded by the inner cylinder, the outer cylinder, and the bottom plate. A plurality of heat dissipation fins are formed on the outer surface of the outer cylinder. The flow guide cover is butt-jointed and fixed to the bottom plate, and the wind shielding side wall is disposed toward the circumferential side of the plurality of heat dissipation fins.

[0036] Furthermore, a first electrical connector for supplying power to the fan stator is provided on the flow guide cover, and a second electrical connector for leading the electrical property of the first electrical connector into the housing in a conductive pin plugging manner is provided on the bottom plate; or an outlet and an outlet groove are provided on the flow guide cover, and the electrical property of the power supply line of the fan stator is led out to the outlet through the outlet groove.

[0037] Furthermore, the magnetic levitation motor further includes a protection structure disposed between the fan rotor and the housing to prevent the fan rotor from colliding with the housing.

[0038] According to another aspect of the present invention, a magnetic levitation device is provided, which is characterized in that it includes the above-mentioned magnetic levitation motor.

[0039] The above technical solution of the present invention has the following advantages compared with the prior art: By integrating the fan stator and the fan rotor on the base of the flow guide cover and integrating the fan impeller on the fan rotor, a magnetic levitation fan heat dissipation device for delivering air flow from the base to the wind shielding side wall is formed. During use, the flow guide cover is butt-jointed and assembled on the housing of the magnetic levitation motor, and the magnetic levitation motor can be air-cooled. The fan stator drives the fan rotor to levitate and rotate in a non-contact manner. While achieving good heat dissipation, there is no mechanical wear and no particles are generated, which can meet the requirements of special working environments such as high cleanliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to make the content of the present invention easier to be clearly understood, the following further describes the present invention in detail according to specific embodiments of the present invention in combination with the drawings, where

[0041] Figure 1 is a schematic structural diagram of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0042] Figure 2It is a schematic structural diagram of Variant 1 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0043] Figure 3 It is a schematic structural diagram of Variant 2 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0044] Figure 4 It is a schematic structural diagram of Variant 3 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0045] Figure 5 It is a schematic structural diagram of Variant 4 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0046] Figure 6 It is a schematic structural diagram of Variant 5 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0047] Figure 7 It is a schematic structural diagram of Variant 6 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0048] Figure 8 It is a schematic structural diagram of Variant 7 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0049] Figure 9 It is an exploded view of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0050] Figure 10 It is a perspective view of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention;

[0051] Figure 11 It is a schematic structural diagram of Embodiment 2 of the magnetic levitation fan heat dissipation device of the present invention;

[0052] Figure 12 It is an exploded view of Embodiment 2 of the magnetic levitation fan heat dissipation device of the present invention;

[0053] Figure 13 It is a perspective view of Embodiment 2 of the magnetic levitation fan heat dissipation device of the present invention;

[0054] Figure 14 It is a schematic structural diagram of Embodiment 3 of the magnetic levitation fan heat dissipation device of the present invention;

[0055] Figure 15 It is a schematic structural diagram of Variant 1 of Embodiment 3 of the magnetic levitation fan heat dissipation device of the present invention;

[0056] Figure 16 It is a schematic structural diagram of Variant 2 of Embodiment 3 of the magnetic levitation fan heat dissipation device of the present invention;

[0057] Figure 17It is a schematic structural diagram of Embodiment 1 of the magnetic levitation motor of the present invention;

[0058] Figure 18 It is a schematic structural diagram of Embodiment 2 of the magnetic levitation motor of the present invention;

[0059] Figure 19 It is a schematic structural diagram of Embodiment 3 of the magnetic levitation motor of the present invention;

[0060] Figure 20 It is a schematic structural diagram of Embodiment 4 of the magnetic levitation motor of the present invention;

[0061] Figure 21 It is a principle block diagram of the magnetic levitation device in the embodiment of the present invention;

[0062] Figure 22 It is a three-dimensional view of the magnetic levitation motor applied to a magnetic levitation pump in an embodiment of the present invention;

[0063] Figure 23 It is a sectional view of the magnetic levitation motor applied to a magnetic levitation pump in an embodiment of the present invention;

[0064] Figure 24 It is a schematic structural diagram of an embodiment of the magnetic levitation motor applied to a magnetic levitation mixer of the present invention. Detailed Embodiments

[0065] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the embodiments cited do not limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0066] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 to the present invention. The terms "including" and "provided with" in the description and claims of the present invention and any variations thereof are intended to cover non-exclusive inclusion. For example, a system, product or device including a series of units does not necessarily have to be limited to those units clearly listed, but may include other units not clearly listed or inherent to these products or devices.

[0067] In the prior art, the magnetic levitation motors used in magnetic levitation pump products mainly adopt the air-cooled heat dissipation method. A flow guide cover is attached to the base of the magnetic levitation motor housing and a cooling fan is configured. Traditional cooling fans have mechanical wear, generate particles, have low cleanliness, and do not have corrosion resistance, and cannot work in explosion-proof areas, resulting in the problem of fan heat dissipation of magnetic levitation motors in some special working environments (flammable and explosive gas and dust areas, strong acid and strong alkali environments, and environments with high cleanliness requirements, etc.).

[0068] To solve the above technical problems, the present invention proposes a magnetic levitation fan heat dissipation device, which, while achieving good heat dissipation, has no mechanical wear, does not generate particles, and can meet the heat dissipation requirements of special working environments such as high cleanliness.

[0069] Figure 1 is a schematic structural diagram of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention; Figure 2 is a schematic structural diagram of Variant 1 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention; Figure 3 is a schematic structural diagram of Variant 2 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention; Figure 4 is a schematic structural diagram of Variant 3 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention; Figure 5 is a schematic structural diagram of Variant 4 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention; Figure 6 is a schematic structural diagram of Variant 5 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention; Figure 7 is a schematic structural diagram of Variant 6 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention; Figure 8 is a schematic structural diagram of Variant 7 of Embodiment 1 of the magnetic levitation fan heat dissipation device of the present invention.

[0070] In one embodiment, see Figure 1, the magnetic levitation fan cooling device includes a flow guide cover 1 and a magnetic levitation fan 2. The flow guide cover 1 includes a base 11 and a wind shielding side wall 12 extending from the base 11 in the first direction Z; the magnetic levitation fan 2 includes a fan stator 21 and a fan rotor 22. The fan stator 21 is fixedly arranged on the base 11, and the fan rotor 22 is movably arranged on the side of the base 11 facing the first direction Z. The fan rotor 22 includes a rotor main body 221 and at least one fan impeller arranged on the rotor main body 221. A ventilation opening 111 communicating with the fan impeller is arranged on the side of the base 11 facing away from the first direction. The fan stator 21 drives the rotor main body 221 and at least one fan impeller to rotate and levitate in a non-contact manner to generate a cooling air flow flowing towards the wind shielding side wall. In this way, by integrating the fan stator and the fan rotor on the base of the flow guide cover and integrating the fan impeller on the fan rotor, a magnetic levitation fan cooling device for conveying air flow from the base to the wind shielding side wall is formed. When in use, the flow guide cover is butt-assembled on the casing of the magnetic levitation motor, and the magnetic levitation motor can be air-cooled. The fan stator drives the fan rotor to levitate and rotate in a non-contact manner, achieving good heat dissipation while having no mechanical wear and no particle generation, and can meet the requirements of special working environments such as high cleanliness.

[0071] Among them, the fan stator drives the rotor main body and at least one fan impeller to rotate and levitate in a non-contact manner. The fan stator and the fan rotor together form a magnetic levitation fan, and this magnetic levitation fan can be realized based on the principles of a magnetic bearing motor, a bearingless motor or a bearingless slice motor. Preferably, referring to Figure 1 , the fan stator drives the fan rotor to rotate and levitate based on the principle of a bearingless slice motor. In this way, based on the principle of the bearingless slice motor, the fan rotor is driven by the levitation and rotation magnetic field of the fan stator to rotate and levitate stably. That is, the fan stator is essentially a magnetic levitation stator, and the fan rotor is essentially a magnetic levitation rotor. Specifically, the fan rotor can be, for example, a permanent magnet rotor or a short-circuit cage rotor or a reluctance rotor. Preferably, the fan rotor is a permanent magnet rotor. For example, the fan rotor is a permanent magnet rotor and includes 1 pole pair, and this pole pair includes 2 poles with opposite polarities (N pole and S pole). The 2 poles are arranged radially and generate a magnetic field distributed according to a cosine. Its technical principle is already in the prior art and will not be elaborated here. For more technical content, reference can be made to patent documents such as CN116191701A and CN116961510A.

[0072] Among them, the air deflector is used to direct the airflow generated by the magnetic levitation fan in a specified direction. For example, at the heat dissipation fins on the peripheral side of the magnetic levitation motor, the air deflector includes a base and a windward side wall. The windward side wall 12 extends from the base 11 in the first direction Z, which can be understood as extending in a direction perpendicular to or approximately perpendicular to the base plane of the base. For example, if the base is used to dock with the axis direction of the magnetic levitation motor, then the first direction is the axis direction of the magnetic levitation motor and towards the magnetic levitation motor, and the base plane of the base is a plane perpendicular to the axis direction, for example, a plane parallel to the radial plane where the suspension center of the rotor is located. In other embodiments, the first direction can also be designed not to be perpendicular to the base as needed, for example, a direction with an angle greater than or less than 90 degrees, and the windward side wall is flared or constricted relative to the base. In this way, when the air deflector is installed on the casing, the windward side wall of the air deflector guides the airflow to the heat dissipation fins, so as to improve the heat dissipation efficiency. The air deflector can be fixedly connected to the bottom plate of the casing in a detachable manner through fasteners, but it is not limited to this. The air deflector can also be detachably fixedly connected to the casing through other means such as buckles.

[0073] The fan stator drives the fan rotor to rotate and levitate in a non-contact manner. According to the relative position relationship between the two, the fan rotor can be designed as an inner rotor or an outer rotor.

[0074] Continue to refer to Figure 1 , in this embodiment, the fan rotor is configured as an outer rotor, and at least one fan impeller includes a centrifugal impeller A222. The centrifugal impeller A222 includes a plurality of centrifugal blades A2221 for generating centrifugal airflow, and the centrifugal blades A2221 are fixedly connected to the rotor body 221. Through the structure of the outer rotor cooperating with the centrifugal impeller, it is possible to generate airflow that enters from the center and is delivered to the windward side walls on the peripheral side (both sides). The overall structure is flat. While realizing the heat dissipation function of the magnetic levitation fan, it does not significantly increase the axial dimension of the magnetic levitation motor equipped with the air deflector, which is convenient for the integrated design with the existing air deflector.

[0075] Continue to refer to Figure 1 , in this embodiment, a groove A112 is formed on one side of the base 11 facing the first direction Z. A diversion air duct A113 is formed between the groove A112 and the windward side wall 12. The centrifugal blades A2221 are arranged in the groove A112 and the centrifugal blades A2221 extend towards the diversion air duct A113. By forming a clearance groove and a diversion air duct on the base of the air deflector, the fan stator and the fan rotor can be embedded inside the air deflector, and the integration of the magnetic levitation fan and the air deflector can be achieved without increasing the axial dimension of the magnetic levitation motor equipped with the air deflector. The structure is simple and easy to implement.

[0076] Continue to refer to Figure 1In this embodiment, a first back plate 223 is provided at one end of the rotor body 221 facing the first direction Z, and a side of the centrifugal blade A2221 facing the first direction Z is mounted on the first back plate 223. The first back plate can improve the structural strength of the centrifugal blade A and restrict the airflow diffusion of the centrifugal blade A, so that the gas flow is smoother, and the heat dissipation effect is further improved.

[0077] See also Figure 2 In a variation, in addition to the technical features in the above-mentioned embodiment, the fan rotor of the magnetic levitation fan further includes a support ring 224, the centrifugal blade A is fixedly connected between the first back plate 223 and the support ring 224, the support ring 223 and the rotor body 221 are fixedly connected by a support member, a cavity 225 is formed between the radial inner end of the centrifugal blade A2221 and the rotor body 221, and the vent 111 is arranged at the bottom of the groove A112 and communicates with the cavity 225. In this way, the support ring can improve the structural strength of the centrifugal blade A installation, and the cavity is formed at a position close to the rotor body. With the design of the base vent, the gas can be concentrated to flow into the centrifugal impeller and then flow to the peripheral side, so that the gas flow is smoother and the heat dissipation effect is further improved.

[0078] In the above-mentioned embodiment, the vent on the base is opposite to and connected to the centrifugal impeller. In other embodiments, the vent on the base can also be connected to the centrifugal impeller indirectly. Figure 3 In another variation, a first through hole 211 is formed on the fan stator 21 and passes through along the first direction Z, and the vent 111 is connected to the first through hole 211. Since the fan rotor is designed as an outer rotor and the fan stator is located at the bottom center of the casing of the magnetic levitation motor, a first through hole is formed on the fan stator and connected to the vent on the base, so that the airflow can reach the bottom of the casing from the center of the base through the first through hole, collide with the bottom of the casing, and then flow to the peripheral side, thereby improving the heat dissipation effect of the bottom of the casing of the magnetic levitation motor.

[0079] See also Figure 4 In another variation, the fan stator 21 is provided with a first guide tube 212 extending in the first direction Z, and the first through hole 211 is arranged opposite to the inner space of the first guide tube 212. Figure 17 In the application of a magnetic levitation motor with an inner cylinder in the center of a casing, by designing a first guide cylinder and extending it into the inner cylinder of the magnetic levitation motor, the function of guiding flow to the inner cylinder part of the casing can be achieved, thereby improving the heat dissipation effect of the inner cylinder position of the casing of the magnetic levitation motor, and the gas flow channel can pass through the bottom of the casing and reach the surrounding side of the casing, thereby achieving heat dissipation of the entire casing.

[0080] See also Figure 6, In a variant, a second guide cylinder 227 extending in the first direction is provided on the fan rotor, and the first through hole 211 is disposed opposite to the internal space of the second guide cylinder 227. Similarly, in the application of a magnetic levitation motor with an inner cylinder at the center of the housing, by designing a second guide cylinder on the rotor and extending it into the inner cylinder of the magnetic levitation motor, the function of guiding the flow to the inner cylinder part of the housing can be achieved, thereby improving the heat dissipation effect at the inner cylinder position of the housing of the magnetic levitation motor, and the gas flow path can pass through the bottom of the housing and reach the periphery of the housing, thereby realizing the heat dissipation of the whole housing.

[0081] In the above embodiments, the centrifugal blade A and the rotor body can be fixedly connected directly or indirectly. Preferably, referring to Figure 4 , the radially inner end of the centrifugal blade A is fixedly connected to the outer peripheral side of the rotor body; in another embodiment, a second back plate 226 is provided at one end of the rotor body 221 facing away from the first direction, and the centrifugal blade A2221 is mounted on the second back plate 226 on the side facing away from the first direction. Alternatively, while the radially inner end of the centrifugal blade A is fixedly connected to the outer peripheral side of the rotor body, it is also fixedly connected to the second back plate 226. In other embodiments, the centrifugal blade A may not be directly connected to the rotor body but be fixedly connected to the rotor body through a support member. By providing the second back plate 226, the structural strength of the centrifugal blade A can be improved and the air flow diffusion of the centrifugal blade can be restricted, making the gas flow smoother and further improving the heat dissipation effect.

[0082] Referring to Figure 7 , in a variant, at least one fan impeller further includes an axial flow impeller A229, and the axial flow impeller A229 includes a plurality of axial flow blades A2291 for generating an axial air flow, and the axial flow blades A229 are disposed in the second guide cylinder 227. Since the design of the second guide cylinder increases the length of the gas flow path, at the same power, the flow rate of the gas flow path may decrease. By adding the axial flow impeller A229, the gas flow rate in the gas flow path can be increased at the same motor power.

[0083] Referring to Figure 8 , in a variant, a third back plate 228 is provided in the middle of the rotor body 221, the centrifugal blade A2221 is mounted on the third back plate 228 on the side facing the first direction Z, and an auxiliary ventilation opening 114 is further provided on the base 11, and the auxiliary ventilation opening 114 is communicated with the centrifugal blade A2221. In this way, by providing the auxiliary ventilation opening 114 at the position of the base corresponding to the centrifugal impeller A2221 and isolating a double flow path through the back plate 228, and cooperating with the double impellers, the gas flow can be more inclined to the periphery of the housing and take into account the inner cylinder and the bottom of the housing, realizing a better heat dissipation effect.

[0084] In order to achieve the integrated design of the fan stator of the outer rotor, according to the embodiments of the present disclosure, referring to Figure 9 andFigure 10 , the fan stator 21 includes a plurality of stator teeth A211 and a plurality of control windings A212. The stator teeth A211 are in a straight line shape. The plurality of stator teeth A211 are equally spaced in the circumferential direction of the same radial plane, and one end of the plurality of stator teeth A211 facing the fan rotor 22 is arranged on the same circumference; the fan stator 21 further includes a magnetic conduction column A213. One end of the plurality of stator teeth A211 facing away from the fan rotor 22 is magnetically connected to the magnetic conduction column A213, and the control winding A212 is sleeved on the stator teeth A211. In this way, the magnetic paths of the stator teeth A are connected by the magnetic conduction column A. The magnetic conduction column A is located at the center, which is suitable for the layout of the outer rotor. Moreover, the fan stator is integrally flat and does not occupy a large axial space on the flow guide cover, and the function of the magnetic levitation fan can be realized in a small axial space.

[0085] The present invention does not limit the installation structure of the fan stator on the flow guide cover. Preferably, referring to Figure 9 , the magnetic levitation fan further includes a stator housing 24. The fan stator 21 is arranged in the stator housing 24 and fixed to the base 11 through the stator housing 24. For example, when the base 11 is formed with a groove A112, the fan stator 21 is fixed in the groove A112 through the stator housing 24. The stator housing 24 can be an integral structure or a split structure. For example, the stator housing 24 includes a cylinder body 241 and a cylinder cover 242 covering the cylinder body. The cylinder body is integrally formed or detachably fixedly connected to the bottom of the groove A. The fan stator 21 is arranged in the cavity surrounded by the stator housing 24 to realize the functions of fixing and protecting the fan stator. In one embodiment, the base is formed with a wire outlet 13 and a wire outlet groove 14 communicating the groove A and the wire outlet 13. In this way, the electricity of the fan stator and the electricity of the sensors arranged on the fan stator can be led out to the wire outlet 13 through the wire outlet groove. The lead-out of the electricity can be realized, for example, through a cable or a conductor.

[0086] According to an embodiment of the present disclosure, referring to Figure 11, the fan rotor is still configured as an outer rotor. At least one fan impeller includes a centrifugal impeller C222”, and the centrifugal impeller C222” includes a plurality of centrifugal blades C2221” for generating a centrifugal air flow. One end of the rotor body 221 facing the first direction is provided with a third back plate 223”. The side of the centrifugal blade 2221” facing away from the first direction is mounted on the third back plate 223”. A third through hole is formed in the fan stator 21 and penetrates along the first direction. The ventilation opening 111 passes through the third through hole and communicates with the middle of the centrifugal impeller C222”; a groove C112” is formed on one side of the base 111 facing the first direction. A diversion air duct C113” is formed between the groove C112” and the wind blocking side wall 12. The centrifugal blade C2221” is arranged in the groove C112” and the centrifugal blade C2221” extends towards the diversion air duct C113”. Different from the outer rotor type fan rotors in the above embodiments, in this embodiment, the centrifugal impeller C is located above the rotor body, and the ventilation opening on the base is designed as an axially extending tube. The ventilation opening passes through the third through hole of the fan stator and communicates with the centrifugal impeller C. Specifically, during implementation, a sub-groove 114” is formed at the bottom of the groove C, and the fan stator and the rotor body are arranged in the sub-groove 114” at the bottom of the groove C. The air flow can be directly communicated to the centrifugal impeller C through the ventilation opening. Among them, the third back plate is used to realize the installation and fixation of the centrifugal blade C and restrict the air flow diffusion of the centrifugal blade C, making the gas flow smoother and further improving the heat dissipation effect. And the third back plate provides a support extending towards the center for the centrifugal blade C, so that the radial length of the centrifugal blade can be lengthened to provide a greater wind force.

[0087] According to an embodiment of the present disclosure, refer to Figure 12 and Figure 13 , the fan stator 21 includes a plurality of stator teeth C211” and a plurality of control windings C212”. The stator teeth C211” are in a straight line shape, and the plurality of stator teeth C211” are equidistantly arranged in the circumferential direction and one end of the plurality of stator teeth C211” facing the fan rotor 22 is arranged on the same circumference; the fan stator 21 further includes a magnetic conduction ring C213”. One end of the plurality of stator teeth C facing away from the fan rotor is magnetically connected to the magnetic conduction ring C, and the control winding C is sleeved on the stator teeth C. The magnetic circuit of each stator tooth C is connected by the magnetic conduction ring C in the fan stator. The fan stator 21 is overall flat and does not occupy a large axial space on the diversion cover, and the function of the magnetic levitation fan can be realized in a smaller axial space.

[0088] Refer to Figure 12, the magnetic levitation fan further includes a stator housing 24. The fan stator 21 is disposed within the stator housing 24 and is fixed to the base 11 through the stator housing 24. For example, when the base 11 is formed with a groove C112”, the fan stator 21 is fixed within the groove C112” through the stator housing 24. The stator housing 24 includes, for example, a cylindrical body 241” and a cylinder cover 242” covering the cylindrical body. The cylindrical body is integrally formed or detachably fixedly connected to the bottom of the groove C. The fan stator 21 is disposed within the cavity surrounded by the stator housing 24 to achieve the fixing and protection functions of the fan stator.

[0089] In the above embodiments, the fan rotor is configured as an outer rotor. In another embodiment, the fan rotor is configured as an inner rotor. Refer to Figure 14 , Figure 15 and Figure 16 , similarly, the fan rotor 22 includes a rotor main body 221 and at least one fan impeller disposed on the rotor main body 221. A ventilation opening 111 communicating with the fan impeller is provided on one side of the base 11 facing away from the first direction. The fan stator 21 drives the rotor main body 221 and at least one fan impeller to rotate and levitate in a non-contact manner to generate a heat dissipation air flow flowing toward the wind shielding side wall. The at least one fan impeller includes a centrifugal impeller B222’. The centrifugal impeller B222’ includes a plurality of centrifugal blades B2221’ for generating centrifugal air flow. The centrifugal blades B222’ are fixedly connected to the rotor main body 221. Similarly, through the structure of the inner rotor cooperating with the centrifugal impeller, air can also be introduced from the center and delivered to the wind shielding side walls on the periphery (both sides). The overall structure is flat. While realizing the heat dissipation function of the magnetic levitation fan, it does not significantly increase the axial dimension of the magnetic levitation motor equipped with a flow guide cover, facilitating the integrated design with the existing flow guide cover.

[0090] According to an embodiment of the present disclosure, refer to Figure 14 , a groove B112’ is formed on one side of the base 11 facing the first direction Z. A flow guide air duct B113’ is formed between the groove B112’ and the wind shielding side wall 12. The centrifugal blades B2221’ are disposed within the groove B112’ and the centrifugal blades B2221’ extend toward the flow guide air duct B113’. Similarly, by forming a clearance groove B and a flow guide air duct B on the base of the flow guide cover, the fan stator and the fan rotor can be embedded inside the flow guide cover, and the integration of the magnetic levitation fan and the flow guide cover can be achieved without increasing the axial dimension of the magnetic levitation motor equipped with the flow guide cover. The structure is simple and easy to implement.

[0091] According to an embodiment of the present disclosure, refer to Figure 14, one end of the rotor body 221 facing the first direction Z is provided with a back plate A223', and one side of the centrifugal blade B2221' facing away from the first direction Z is mounted on the back plate A223'. According to the structure of the inner rotor, in this embodiment, the centrifugal blade B is located above the rotor body. Therefore, by mounting one side of the centrifugal blade B2221' facing away from the first direction Z on the back plate A223', the fixation of the centrifugal blade B and the back plate A is realized. The back plate A improves the structural strength of the centrifugal blade B and restricts the air flow diffusion of the centrifugal blade B, making the gas flow smoother and further improving the heat dissipation effect.

[0092] According to an embodiment of the present disclosure, refer to Figure 15 , in a variant, according to the characteristics of the fan rotor of the inner rotor, at least one fan impeller further includes an axial-flow impeller B229', the axial-flow impeller B229' includes a plurality of axial-flow blades B2291' for generating axial air flow, and a second through hole 224' penetrating along the first direction is formed on the rotor body 221, the ventilation port 111 is communicated with the second through hole 224', and the axial-flow blades B2291' are arranged in the second through hole 224'. By arranging the axial-flow impeller B in the second through hole at the center of the rotor body to form a double-impeller structure, better power can be provided and a better heat dissipation effect can be achieved when the air flow path is long.

[0093] According to an embodiment of the present disclosure, refer to Figure 16 , in a variant, according to the characteristics of the fan rotor of the inner rotor, a guide cylinder A225' extending towards the first direction Z is provided on the rotor body 221, and the second through hole 224' is disposed opposite to the internal space of the guide cylinder A225'. In this way, in the application of a magnetic levitation motor with an inner cylinder at the center of the casing, by designing the guide cylinder A and extending it into the inner cylinder of the magnetic levitation motor, the function of guiding the flow to the inner cylinder part of the casing can be realized, thereby improving the heat dissipation effect at the inner cylinder position of the casing of the magnetic levitation motor, and the gas flow path can pass through the bottom of the casing and reach the periphery of the casing, so as to realize the heat dissipation of the whole casing. Since the design of the guide cylinder A increases the length of the gas flow path, preferably, it is combined with the embodiment in which the fan rotor is provided with the axial-flow impeller B to increase the gas flow rate in the gas flow path at the same power.

[0094] In order to realize the integrated design of the fan stator of the inner rotor, according to an embodiment of the present disclosure, refer to Figure 14 and Figure 15, the fan stator 21 includes a plurality of stator teeth B211' and a plurality of control windings B212'. The stator teeth B211' are in a straight shape. The plurality of stator teeth B211' are equidistantly arranged in the circumferential direction, and one end of the plurality of stator teeth B211' facing the fan rotor 22 encloses a rotor cavity. The fan stator further includes a magnetic conductive ring B213'. One end of the plurality of stator teeth B211' facing away from the fan rotor 22 is magnetically connected to the magnetic conductive ring B213'. The control winding B212' is sleeved on the stator teeth B211'. In this way, the magnetic paths of the stator teeth A are connected by the magnetic conductive ring B in the fan stator. The fan stator is overall flat and does not occupy a large axial space on the flow guide cover, and the function of the magnetic levitation fan can be realized in a small axial space. Continue to refer to Figure 14 , the fan stator further includes an annular bracket 23. The annular bracket 23 is fixedly connected to the base 11, and the magnetic conductive ring B213' is fixed to the base 11 through the annular bracket 23. In this way, the installation and fixation of the fan stator 21 on the flow guide cover base can be realized through the annular bracket 23, and the structure is simple and easy to implement.

[0095] In the above embodiments, the number and shape of the plurality of centrifugal blades or axial flow blades are not limited, and can be designed according to the comprehensive results of parameters such as the wind force, noise, and rotational speed of the actually generated air flow. For example, it can be in the form of straight blades with equal thickness or unequal thickness. The form of the fixed connection between the centrifugal blade and the rotor main body or the back plate is not limited. For example, the centrifugal blade can be directly installed on the rotor main body or the back plate, or can be indirectly fixedly connected to the rotor main body in other ways. Among them, the fixed connection includes connecting in a detachable manner or a non-detachable manner.

[0096] Figure 17 is a schematic structural diagram of Embodiment 1 of the magnetic levitation motor of the present invention; Figure 18 is a schematic structural diagram of Embodiment 2 of the magnetic levitation motor of the present invention; Figure 19 is a schematic structural diagram of Embodiment 3 of the magnetic levitation motor of the present invention; Figure 20 is a schematic structural diagram of Embodiment 4 of the magnetic levitation motor of the present invention.

[0097] Based on the same inventive concept, refer to Figure 17 、 Figure 18 、 Figure 19 and Figure 20 , the present invention also proposes a magnetic levitation motor 3, including the suspension fan heat dissipation device in the above embodiments, wherein, Figure 17 and Figure 19 show two embodiments in which the magnetic levitation fan of the magnetic levitation heat dissipation device is configured as an outer rotor type fan rotor. Figure 18 shows an embodiment in which the magnetic levitation fan of the magnetic levitation heat dissipation device is configured as an inner rotor type fan rotor.

[0098] The type of the magnetic levitation motor of the present invention is not limited, and it can be generally summarized as a magnetic levitation rotary driver that uses magnetic force to levitate the rotor so that there is no mechanical contact between the rotor and the stator. Preferably, the magnetic levitation motor is a bearingless wafer motor, including a magnetic levitation stator 31 and a magnetic levitation rotor. The magnetic levitation stator is configured to drive the magnetic levitation rotor to levitate and rotate in a non-contact manner.

[0099] The bearingless wafer motor is a special bearingless motor. It inherits the advantages of the bearingless motor, and the ratio of the axial length to the diameter of the rotor is very small, presenting a wafer shape. The axial magnetic bearing is omitted, and the rotation of the rotor and the active suspension in the radial direction are realized by using the bearingless technology. The passive suspension of the other three degrees of freedom except the radial and the rotor rotation degrees of freedom is realized by using the magnetic circuit formed by the mechanical structure. It has the characteristics of high cleanliness, no precipitation, no particles, no dynamic seal, and excellent performance, and has good application prospects in ultra-clean drive fields such as biochemistry, medical treatment, and semiconductor manufacturing.

[0100] According to different winding structures, the bearingless wafer motor can be divided into a single-winding structure and a double-winding structure. The winding structure of the bearingless wafer motor of the present invention is not limited, and it can be a single-winding structure or a double-winding structure. Refer to Figure 17 - Figure 20 , the magnetic levitation stator 31 of the magnetic levitation motor includes a housing 311 and a stator assembly 312. The housing includes an outer cylinder 3111, an inner cylinder 3112, and a bottom plate 3113 connected between the outer cylinder 3111 and the inner cylinder 3112. The stator assembly 312 is arranged in the annular space 3114 surrounded by the inner cylinder 3111, the outer cylinder 3112, and the bottom plate 3113. A plurality of heat dissipation fins 3115 are formed on the outer surface of the outer cylinder 3111. The flow guide cover 1 is butt-jointed and fixed to the bottom plate 3113, and the wind blocking side wall 12 is arranged on the circumferential side facing the plurality of heat dissipation fins 3115. In this way, by butting and assembling the flow guide cover on the bottom plate of the housing of the magnetic levitation motor, the housing of the magnetic levitation motor can be air-cooled. The fan stator drives the fan rotor to levitate and rotate without contact. While achieving good heat dissipation, there is no mechanical wear and no particles are generated, which can meet the requirements of special working environments such as high cleanliness.

[0101] According to an embodiment of the present disclosure, refer to Figure 17 - Figure 20 , the stator assembly 312 of the magnetic levitation stator 31 includes a plurality of stator teeth 3121 and a plurality of control windings 3122. The stator teeth 3121 are in an L shape. The stator assembly 312 further includes a magnetic conductive ring 3123. The longitudinal arms A1211 of the plurality of stator teeth 3121 are magnetically connected to the magnetic conductive ring 3123. The control windings 3122 are sleeved on the longitudinal arms A1211 of the stator teeth 3121. The transverse arms A of the plurality of stator teeth 3121 enclose a rotor cavity. In one embodiment, refer to Figure 17, two winding coils are arranged on each stator tooth. The two winding coils can both be concentrated windings, or one winding coil can be a concentrated winding and the other winding coil can be a distributed winding. Refer to Figure 17 , the two winding coils on the stator tooth are wound together. One winding coil is used for rotation control, and the other winding coil is used for suspension control to form a double-winding structure of the magnetic levitation motor. In another embodiment, one winding coil is arranged on each stator tooth. The winding coil is a concentrated winding, and the winding coil is used for both rotation control and suspension control to form a single-winding structure of the magnetic levitation motor.

[0102] In one embodiment, refer to Figure 20 , a first electrical connector 410 for supplying power to the fan stator is provided on the flow guide cover 1, and a second electrical connector 420 for leading the electrical property of the first electrical connector 410 into the machine shell in a conductive pin plugging manner is provided on the bottom plate 3113; in this way, by leading out the power supply of the fan stator to the first electrical connector 410 and arranging the second electrical connector 420 on the machine shell of the magnetic levitation motor, when the flow guide cover is docked and assembled to the machine shell, the first electrical connector and the second electrical connector are conductively connected through the conductive pin plugging, and the power supply of the fan stator can be transferred to the inside of the machine shell of the magnetic levitation motor, so as to realize the centralized management of the power supply of the two, without the need to configure a separate power supply line, improving the environmental cleanliness and reducing the failure rate.

[0103] In another embodiment, refer to Figure 10 , an outlet 13 and an outlet groove 14 are provided on the flow guide cover 1, and the electrical property of the power supply line of the fan stator is led out to the outlet 13 through the outlet groove 14. In this way, the electrical property of the fan stator and the electrical property of the sensor arranged on the fan stator can be led out to the outlet 13 through the outlet groove. The leading out of the electrical property can be realized, for example, through a cable or a conductor. In other embodiments, the control circuit board for controlling the fan stator and conditioning the sensor signal can also be integrated in the flow guide cover, and the electrical property of the control circuit board is led out to the outlet through the outlet groove, and the entire magnetic levitation fan heat dissipation device only needs to be externally connected to a power supply through a cable.

[0104] In another embodiment, refer to Figure 20 , the magnetic levitation motor further includes a protection structure 430 provided between the fan rotor 22 and the machine shell 311 to prevent the fan rotor 22 from colliding with the machine shell 311. The protection structure can prevent the fan rotor from colliding with the machine shell of the magnetic levitation motor when the fan rotor is accidentally out of control, thereby causing damage to the magnetic levitation motor. The protection structure can be arranged on the machine shell or on the magnetic levitation fan heat dissipation structure. For example, it is fixedly connected to the flow guide cover or the fan stator of the magnetic levitation fan. Refer to Figure 20 , the protection structure is in a circular ring shape and is fixedly connected to one end of the fan stator facing the machine shell. Thereby, it can prevent the fan rotor from colliding with the machine shell when it gets out of control.

[0105] Figure 21 is the principle block diagram of the magnetic levitation device in the embodiment of the present invention; Figure 22 is the three-dimensional view of the magnetic levitation motor applied to the magnetic levitation pump in an embodiment of the present invention; Figure 23 is the sectional view of the magnetic levitation motor applied to the magnetic levitation pump in an embodiment of the present invention; Figure 24 is the structural schematic diagram of an embodiment of the magnetic levitation motor applied to the magnetic levitation mixer of the present invention.

[0106] According to the embodiments of the present disclosure, based on the same inventive concept, refer to Figure 21 , Figure 22 , Figure 23 and Figure 24 , the present invention also proposes a magnetic levitation device, including the magnetic levitation motor in each of the above embodiments.

[0107] According to the embodiments of the present disclosure, refer to Figure 21 , the magnetic levitation device further includes a control system, and the control system includes a first control unit for controlling the magnetic levitation stator and a second control unit for controlling the fan stator. Compared with a traditional motor using a contact mechanical bearing, the magnetic levitation motor needs to perform more degrees of freedom control. This requires integrating more sensors in the motor body. Through the sensors, the control data of the magnetic levitation motor can be detected in real time. The control data can include, for example, rotor displacement data, rotor angle data (rotor speed data), or current data of the electromagnetic coil, etc. Taking the control data as the feedback quantity, the control system (the first control unit and the second control unit) of the magnetic levitation motor generates a control signal for the power amplifier as the execution part according to the control strategy, and the power amplifier outputs a current to excite the electromagnetic coil of the stator part of the magnetic levitation motor to achieve the suspension and / or rotation control of the rotor.

[0108] According to the embodiments of the present disclosure, refer to Figure 21 , the magnetic levitation device further includes a temperature sensor for detecting the temperature inside the casing, and the second control unit regulates the operation of the magnetic levitation fan according to the temperature signal provided by the temperature sensor. The temperature sensor can be independently arranged or a temperature sensor built in the magnetic levitation stator. The second control unit of the fan stator controls the speed according to the temperature signal recognized by the temperature sensor. It can start the magnetic levitation fan to work when the temperature is higher than the set temperature, and turn off the magnetic levitation fan when the temperature is lower than the set temperature. Moreover, the speed of the fan rotor can also increase with the rise of the temperature, so as to avoid waste of energy while meeting the necessary heat dissipation effect.

[0109] According to an embodiment of the present disclosure, the second control unit is built into the housing or the second control unit and the first control unit are integrally integrated into a controller. On the one hand, since the magnetic levitation fan is used as an auxiliary device for heat dissipation, and the precision requirement for temperature control is not as precise as that for the pumping control of the magnetic levitation pump using a magnetic levitation motor, the control difficulty of the suspension and rotation of the magnetic levitation fan is relatively low. Accordingly, the second control unit can be made into a simple control circuit board and thus integrated into the housing. On the other hand, in order to save space inside the housing and simplify the design difficulty inside the housing, the second control unit and the first control unit can also be integrally integrated into the same controller or different controllers. The controller is electrically connected to the magnetic levitation motor only through a power supply and a signal line.

[0110] According to an embodiment of the present disclosure, the magnetic levitation motor can be assembled with different functional fittings to form magnetic levitation devices for different application requirements. For example, the magnetic levitation device includes, but is not limited to, a magnetic levitation pump or a magnetic levitation mixer.

[0111] In one embodiment, referring to Figure 22 and Figure 23 , the magnetic levitation device is configured as a magnetic levitation pump. In the application of the magnetic levitation pump, in addition to the magnetic levitation motor in the above embodiments, the magnetic levitation pump further includes a pump head 200. The pump head 200 includes a pump housing 210 and a rotor impeller 220 disposed inside the pump housing 210. The rotor impeller includes a magnetic levitation rotor 32. The magnetic levitation rotor 32 is both the rotor of the magnetic levitation motor and a part of the rotor impeller 220 of the pump. It can be, for example, a permanent magnet rotor, a short-circuit cage rotor, or a reluctance rotor. The magnetic levitation stator is configured to drive the rotor impeller to rotate and levitate.

[0112] In another embodiment, the magnetic levitation device is configured as a magnetic levitation mixer. Referring to Figure 24 , in the application of the magnetic levitation mixer, in addition to the magnetic levitation motor in the above embodiments, the magnetic levitation mixer further includes a stirring device 200'. The stirring device includes a stirring container 210' and a rotor stirring head 220' disposed inside the stirring container. The magnetic levitation rotor is both the rotor of the magnetic levitation motor and a part of the rotor stirring head of the stirring device. The magnetic levitation stator is configured to drive the rotor stirring head to rotate and levitate.

[0113] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A magnetic levitation fan heat dissipation device, characterized in that It includes a fairing (1) and a maglev fan (2). The fairing includes a base (11) and a windward sidewall (12) extending from the base in the first direction (Z). The maglev fan includes a fan stator (21) and a fan rotor (22). The fan stator is fixedly arranged on the base. The fan rotor is movably arranged on one side of the base facing the first direction. The fan rotor includes a rotor main body (221) and at least one fan impeller arranged on the rotor main body. A ventilation opening (111) communicating with the fan impeller is arranged on one side of the base facing away from the first direction. The fan stator drives the rotor main body and the at least one fan impeller to rotate and levitate in a non-contact manner to generate a heat dissipation air flow flowing towards the windward sidewall.

2. The magnetic levitation fan heat dissipation device according to claim 1, characterized in that: The fan rotor is configured as an outer rotor. The at least one fan impeller includes a centrifugal impeller A (222). The centrifugal impeller A includes a plurality of centrifugal blades A (2221) for generating centrifugal air flow. The centrifugal blades A are fixedly connected to the rotor main body.

3. The magnetic levitation fan heat dissipation device according to claim 2, characterized in that A groove A (112) is formed on one side of the base facing the first direction. A diversion air duct A (113) is formed between the groove A and the windward sidewall. The centrifugal blades A are arranged in the groove A and extend towards the diversion air duct A.

4. The magnetic levitation fan heat dissipation device according to claim 3, wherein, A first back plate (223) is arranged at one end of the rotor main body facing the first direction. One side of the centrifugal blades A facing the first direction is mounted on the first back plate.

5. The magnetic levitation fan heat dissipation device according to claim 4, characterized in that, The fan rotor further includes a support ring (224). The centrifugal blades A are fixedly connected between the first back plate and the support ring. The support ring and the rotor main body are fixedly connected through a support member. A cavity (225) is formed between the radially inner end of the centrifugal blades A and the rotor main body. The ventilation opening is arranged at the bottom of the groove A and communicates with the cavity.

6. The magnetic levitation fan heat dissipation device according to claim 3, wherein, A first through hole (211) penetrating along the first direction is formed on the fan stator. The ventilation opening communicates with the first through hole.

7. The magnetic levitation fan heat dissipation device according to claim 6, wherein, A first diversion cylinder (212) extending towards the first direction is arranged on the fan stator. The first through hole is oppositely arranged with the inner space of the first diversion cylinder.

8. The magnetic levitation fan heat dissipation device according to claim 7, characterized in that The radially inner end of the centrifugal blades A is fixedly connected to the outer peripheral side of the rotor main body; or a second back plate (226) is arranged at one end of the rotor main body facing away from the first direction. One side of the centrifugal blades A facing away from the first direction is mounted on the second back plate.

9. The magnetic levitation fan heat dissipation device according to claim 6, characterized in that, A second diversion cylinder (227) extending towards the first direction is arranged on the fan rotor. The first through hole is oppositely arranged with the inner space of the second diversion cylinder.

10. The magnetic levitation fan heat dissipation device according to claim 9, characterized in that, The radially inner end of the centrifugal blades A is fixedly connected to the outer peripheral side of the rotor main body; or a second back plate (226) is arranged at one end of the rotor main body facing away from the first direction. One side of the centrifugal blades A facing away from the first direction is mounted on the second back plate.

11. The magnetic levitation fan heat dissipation device according to claim 9, wherein The at least one fan impeller further includes an axial-flow impeller A (229), the axial-flow impeller A includes a plurality of axial-flow blades A (2291) for generating an axial air flow, and the axial-flow blades A are arranged inside the second guide cylinder.

12. The magnetic levitation fan heat dissipation device according to claim 11, wherein, A third back plate (228) is provided in the middle of the rotor main body. One side of the centrifugal blade A facing the first direction is mounted on the third back plate. An auxiliary ventilation opening (114) is further provided on the base, and the auxiliary ventilation opening communicates with the centrifugal blade A.

13. The magnetic levitation fan heat dissipation device according to any one of claims 2-12, characterized in that: The fan stator includes a plurality of stator teeth A (211) and a plurality of control windings A (212). The stator teeth A are in a straight line shape. The plurality of stator teeth A are equidistantly arranged in the circumferential direction on the same radial plane, and one ends of the plurality of stator teeth A facing the fan rotor are arranged on the same circumference. The fan stator further includes a magnetic conduction column A (213). One ends of the plurality of stator teeth A facing away from the fan rotor are magnetically connected to the magnetic conduction column A, and the control winding A is sleeved on the stator teeth A.

14. The magnetic levitation fan heat dissipation device according to claim 1, characterized in that: The fan rotor is configured as an inner rotor. The at least one fan impeller includes a centrifugal impeller B (222’), and the centrifugal impeller B includes a plurality of centrifugal blades B (2221’) for generating a centrifugal air flow. The centrifugal blades B are fixedly connected to the rotor main body.

15. The magnetic levitation fan heat dissipation device according to claim 14, wherein, A groove B (112’) is formed on one side of the base facing the first direction. A diversion air duct B (113’) is formed between the groove B and the wind shielding side wall. The centrifugal blades B are arranged in the groove B and the centrifugal blades B extend towards the diversion air duct B.

16. The magnetic levitation fan heat dissipation device according to claim 15, characterized in that, One end of the rotor main body facing the first direction is provided with a back plate A (223’). One side of the centrifugal blade B facing away from the first direction is mounted on the back plate A.

17. The magnetic levitation fan heat dissipation device according to claim 16, characterized in that, The at least one fan impeller further includes an axial-flow impeller B (229’), the axial-flow impeller B includes a plurality of axial-flow blades B (2291’) for generating an axial air flow. A second through hole (224’) penetrating along the first direction is formed on the rotor main body. The ventilation opening communicates with the second through hole, and the axial-flow blades B are arranged in the second through hole.

18. The magnetic levitation fan heat dissipation device according to claim 17, wherein, A guide cylinder A (225’) extending towards the first direction is provided on the rotor main body. The second through hole is disposed opposite to the inner space of the guide cylinder A.

19. The magnetic levitation fan heat dissipation device according to any one of claims 15-18, characterized in that, The fan stator includes a plurality of stator teeth B (211’) and a plurality of control windings B (212’). The stator teeth B are in a straight line shape. The plurality of stator teeth B are equidistantly arranged in the circumferential direction, and one ends of the plurality of stator teeth B facing the fan rotor enclose a rotor cavity. The fan stator further includes a magnetic conduction ring B (213’). One ends of the plurality of stator teeth B facing away from the fan rotor are magnetically connected to the magnetic conduction ring B, and the control winding B is sleeved on the stator teeth B.

20. The magnetic levitation fan heat dissipation device according to claim 19, wherein The fan stator further includes an annular bracket (23). The annular bracket is fixedly connected to the base, and the magnetic conduction ring B is fixed to the base through the annular bracket.

21. The magnetic levitation fan heat dissipation device according to claim 1, wherein: The fan rotor is configured as an outer rotor. The at least one fan impeller includes a centrifugal impeller C (222”), and the centrifugal impeller C includes a plurality of centrifugal blades C (2221”) for generating a centrifugal air flow. One end of the rotor body facing the first direction is provided with a third back plate (223”). The centrifugal blades are mounted on the third back plate on the side facing away from the first direction. A third through hole penetrating along the first direction is formed on the fan stator, and the ventilation opening communicates with the middle of the centrifugal impeller C through the third through hole. A groove C (112”) is formed on one side of the base facing the first direction, and a diversion air duct C (113”) is formed between the groove C and the wind shielding side wall. The centrifugal blades C are arranged in the groove C and the centrifugal blades C extend towards the diversion air duct C.

22. The magnetic levitation fan heat dissipation device according to claim 21, wherein The fan stator includes a plurality of stator teeth C (211”) and a plurality of control windings C (212”). The stator teeth C are in a straight line shape. The plurality of stator teeth C are equally spaced in the circumferential direction and one end of the plurality of stator teeth C facing the fan rotor is arranged on the same circumference. The fan stator further includes a magnetic conductive ring C (213”). One end of the plurality of stator teeth C facing away from the fan rotor is magnetically connected to the magnetic conductive ring C, and the control winding C is sleeved on the stator teeth C.

23. The magnetic levitation fan heat dissipation device according to claim 22, wherein: It further includes a stator housing (24”). The fan stator is arranged in the stator housing and fixed to the base through the stator housing.

24. A magnetic levitation motor, characterized in that, It includes the magnetic levitation fan heat dissipation device according to any one of claims 1-23.

25. The magnetic levitation motor according to claim 24, characterized in that, The magnetic levitation motor (3) includes a magnetic levitation stator (31) and a magnetic levitation rotor (32). The magnetic levitation stator is configured to drive the magnetic levitation rotor to levitate and rotate in a non-contact manner.

26. The magnetic levitation motor according to claim 25, wherein The magnetic levitation stator includes a housing (311) and a stator assembly (312). The housing includes an outer cylinder (3111), an inner cylinder (3112), and a bottom plate (3113) connected between the outer cylinder and the inner cylinder. The stator assembly is arranged in an annular space (3114) surrounded by the inner cylinder, the outer cylinder, and the bottom plate. A plurality of heat dissipation fins (3115) are formed on the outer surface of the outer cylinder. The diversion cover is butt-jointed and fixed to the bottom plate, and the wind shielding side wall is arranged on the peripheral side facing the plurality of heat dissipation fins.

27. The magnetic levitation motor according to claim 26, characterized in that, A first electrical connector (410) for supplying power to the fan stator is provided on the diversion cover, and a second electrical connector (420) for leading the electrical property of the first electrical connector into the housing in a conductive pin plugging manner is provided on the bottom plate; or an outlet (13) and an outlet groove (14) are provided on the diversion cover, and the electrical property of the power supply line of the fan stator is led out to the outlet through the outlet groove.

28. The magnetic levitation motor according to claim 26, wherein The magnetic levitation motor further includes a protection structure (430) arranged between the fan rotor and the housing to prevent the fan rotor from colliding with the housing.

29. A magnetic levitation device, characterized in that: It includes the magnetic levitation motor according to any one of claims 24-28.

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