Fan

Abstract

The present invention proposes a fan, comprising: a motor, the motor comprising at least one stator assembly and at least one rotor arranged corresponding to the stator assembly, wherein the stator assembly comprises a detachably connected stator yoke and at least one stator tooth, a winding is wound on the stator tooth, the stator yoke is provided with a stator yoke slot and / or a stator boss adapted to the shape of the stator tooth, and the stator tooth axially passes through the stator yoke slot and / or the stator boss to form a stator core; a first rotating shaft, connected to at least one rotor, and a first blade is provided at one end of the first rotating shaft to drive the first blade to rotate when the first rotating shaft rotates. The fan provided by the present application has a simple and compact structure, a convenient and easy-to-operate winding process, and a large motor power expansion capability; and the rotor and the first blade are connected by the first rotating shaft, so that the first blade can be driven to rotate by the first rotating shaft when the rotor rotates, so that the wind force generated by the first blade can also expand with the expansion of the motor power.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a fan. Background Art

[0002] The motors in fans usually use radial motors. When winding the wires, the size of the winding slots is relatively fixed, which limits the power level of the stator core. Before each winding, the corresponding operating power has been set, which greatly affects the expansion of the product. At the same time, the winding method is relatively single, which also affects the winding efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, an object of the present invention is to provide a fan.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a fan, comprising: a motor, the motor comprising at least one stator assembly and at least one rotor arranged corresponding to the stator assembly, wherein the stator assembly comprises a detachably connected stator yoke and at least one stator tooth, a winding is wound around the stator tooth, the stator yoke is provided with stator yoke slots and / or stator bosses adapted to the shape of the stator teeth, and the stator teeth axially pass through the stator yoke slots and / or the stator bosses to form a stator core; a first rotating shaft, connected to at least one of the rotors, and a first fan blade is provided at one end of the first rotating shaft to drive the first fan blade to rotate when the first rotating shaft rotates.

[0006] In this technical solution, the stator assembly includes a detachably connected stator yoke and at least one stator tooth, a winding is wound on the stator tooth, and the stator yoke is provided with a stator yoke slot that matches the shape of the stator tooth, and the stator tooth passes through the stator yoke slot or is inserted into the stator boss along the axial direction to form a stator core. Such a structure is simple and compact, the winding process is convenient and easy to operate, and the motor power expansion capability is large; and the rotor and the first fan blade are connected by a first rotating shaft, so that when the rotor rotates, the first fan blade can be driven to rotate by the first rotating shaft, so that the wind force generated by the first fan blade can also expand with the expansion of the motor power.

[0007] Among them, the rotor can be a permanent magnet rotor, a squirrel cage rotor or a salient pole rotor. In particular, when the rotor is a permanent magnet rotor, the permanent magnet rotor can also be a radial flux rotor or an axial flux rotor. The magnetic steel structure of the permanent magnet rotor can be surface-mounted, embedded or in the form of a Halbach array.

[0008] In the above technical solution, the stator yoke specifically includes: a plurality of first magnetic conductive sheets, and the plurality of first magnetic conductive sheets are stacked along the radial direction or axial direction of the stator core.

[0009] In this technical solution, the stator yoke specifically includes a plurality of first magnetic conductive sheets, and the magnetic conductivity of the stator core is improved by stacking the plurality of first magnetic conductive sheets in the radial or axial direction of the stator core. Specifically, the stacking direction of the first magnetic conductive sheets can be radial or axial, and can be flexibly adjusted according to specific usage scenarios and processing requirements.

[0010] In the above technical solution, the stator yoke is in the shape of a circular ring, an elliptical ring, or a polygonal ring, and the stator yoke slot axially penetrates at least one end face of the stator yoke.

[0011] In this technical solution, the stator yoke is annular with a relatively regular annular structure, which is convenient for processing and forming and suitable for mass production. Of course, it can also be elliptical or polygonal in shape. The stator yoke slots penetrate at least the two end faces of the stator yoke in the axial direction, so that the stator teeth can pass through the stator yoke slots and connect with the stator yoke, so as to improve the assembly efficiency and connection reliability of the stator teeth and the stator yoke.

[0012] In the above technical solution, there is a distance between the stator yoke slot and the outer circumferential surface of the stator yoke part in the radial direction, and there is a distance between the stator yoke slot and the inner circumferential surface of the stator yoke part in the radial direction; or the stator yoke slot is connected to the outer circumferential surface and / or inner circumferential surface of the stator yoke part.

[0013] In this technical solution, there is a distance in the radial direction between the stator yoke slot and the outer peripheral surface of the stator yoke part, that is, the stator yoke slot passes through the stator yoke part and is not connected with the outer peripheral surface of the stator yoke part. The stator teeth are inserted into the stator yoke slot along the axial direction of the stator yoke part to be connected with the stator yoke part, thereby preventing the stator teeth from being separated from the stator yoke part along the outer peripheral surface or inner peripheral surface of the stator yoke part from the stator yoke slot, thereby improving the connection reliability between the stator teeth and the stator yoke part.

[0014] The stator yoke slots are connected to the outer circumference or inner circumference of the stator yoke part, so the stator teeth can be inserted into the stator yoke slots from the outer circumference or inner circumference of the stator yoke part. The connection method is flexible and convenient for assembly between the stator teeth and the stator yoke part.

[0015] The stator yoke slots are connected to the outer circumference and the inner circumference of the stator yoke part at the same time, so the stator teeth can be inserted into the stator yoke slots axially or radially from the outer circumference to form a complete stator core.

[0016] In the above technical solution, the stator boss is formed by extending radially outward from the outer circumferential surface of the stator yoke; and / or, the stator boss is formed by extending radially inward from the inner circumferential surface of the stator yoke.

[0017] The stator boss is formed by extending radially outward from the outer circumferential surface of the stator yoke. Preferably, a groove is provided on the stator tooth. When the stator tooth is connected to the stator yoke, the groove on the stator tooth is inserted into the stator boss on the outer circumferential surface of the stator yoke to achieve quick assembly of the stator tooth and the stator yoke.

[0018] Of course, the stator boss can also be formed by extending radially inward from the inner circumferential surface of the stator yoke. Preferably, a groove is provided on the stator tooth. When the stator tooth is connected to the stator yoke, the groove on the stator tooth is inserted into the stator boss on the inner circumferential surface of the stator yoke to achieve rapid assembly of the stator tooth and the stator yoke.

[0019] In the above technical solution, the stator yoke specifically includes: a plurality of first magnetic conductive sheets, which are laminated radially or axially along the stator core. The stator teeth specifically include: a stator tooth body, which includes a plurality of second magnetic conductive sheets, which are laminated radially or circumferentially along the stator core.

[0020] In this technical solution, the stator yoke specifically includes a plurality of first magnetic conductive sheets, and the plurality of first magnetic conductive sheets are laminated radially or axially of the stator core, thereby improving the magnetic conductivity of the stator core. Specifically, the lamination direction of the first magnetic conductive sheets can be radial or axial, and can be flexibly adjusted according to specific usage scenarios and processing requirements. The stator teeth specifically include a stator tooth body, and the stator tooth body includes a plurality of second magnetic conductive sheets. By laminating the plurality of second magnetic conductive sheets radially or circumferentially of the stator core, the magnetic conductivity of the stator core is further improved.

[0021] The lamination direction of the second magnetic conductive sheets is perpendicular to the lamination direction of the first magnetic conductive sheets, which further improves the magnetic conductivity of the stator core.

[0022] In the above technical solution, the stator tooth further includes: a stator tooth shoe, which is arranged at the end of the stator tooth body, and the stator tooth shoe is detachably connected to the stator tooth body.

[0023] The stator teeth also include a stator tooth shoe disposed at the end of the stator tooth body, and being detachably connected to the stator tooth body, after the winding is wound on the stator tooth body, the stator tooth shoe is connected to the stator tooth body to fix the winding and prevent the winding from being separated from the stator tooth body, thereby further improving the assembly efficiency of the winding and the stator teeth.

[0024] It is worth noting that the materials of the stator tooth body and the stator tooth shoe can be the same or different.

[0025] In the above technical solution, the stator tooth shoe and the stator tooth body are integrally formed.

[0026] In this technical solution, the stator tooth shoe and the stator tooth body are integrally formed, which simplifies the structure of the product, improves the integrity of the product, and eliminates the step of connecting the stator tooth shoe and the stator tooth body, further improving the assembly efficiency of the product.

[0027] In the above technical solution, the number of the stator tooth shoe is one, and the stator tooth shoe is arranged at one end of the stator tooth body; or the number of the stator tooth shoe is two, and one stator tooth shoe is respectively arranged at both ends of the stator tooth body.

[0028] In this technical solution, the number of stator tooth shoes provided on each stator tooth body can be adjusted according to actual needs. Specifically, one stator tooth body can be provided with one stator tooth shoe, and one stator tooth body can also be provided with two stator tooth shoes.

[0029] It should be noted that the two stator tooth shoes can be respectively arranged on the two end surfaces of the stator tooth body.

[0030] In the above technical solution, the stator assembly also includes: a matching groove and a matching rib of corresponding shape, wherein one of the matching groove and the matching rib is arranged on the stator tooth body, and the other is arranged on the stator tooth shoe, so as to realize the connection between the stator tooth shoe and the stator tooth body through the cooperation between the matching groove and the matching rib.

[0031] By arranging a matching convex rib on the stator tooth body and a matching groove on the stator tooth shoe, when the stator tooth shoe and the stator tooth body are assembled, the matching convex rib is directly inserted into the matching groove to limit the relative movement between the stator tooth shoe and the stator tooth body, thereby improving the assembly efficiency of the stator tooth shoe and the stator tooth body and improving the stability of the connection between the stator tooth shoe and the stator tooth body.

[0032] In the above technical solution, there are multiple stator yoke slots and / or stator bosses, and the multiple stator yoke slots and / or stator bosses are evenly arranged on the stator yoke part around the axis of the stator core.

[0033] In this technical solution, the number of stator yoke slots is multiple. By evenly arranging multiple stator yoke slots or stator bosses on the stator yoke part around the axis of the stator core, the structure of the product is more regular, and the number of stator yoke slots or the stator bosses is increased. Correspondingly, the number of stator teeth is also multiple, and multiple stator teeth are inserted into the corresponding multiple stator yoke slots, thereby increasing the number of windings, which in turn helps to improve the power level of the stator core.

[0034] In the above technical solution, the stator yoke slots specifically include: at least two types of yoke slots, each of which has a spacing in the radial direction between the yoke slots and the outer circumferential surface of the stator yoke part, and each of which has a spacing in the radial direction between the yoke slots and the inner circumferential surface of the stator yoke part; or each of which is connected to the outer circumferential surface and / or inner circumferential surface of the stator yoke part.

[0035] In this technical solution, there are multiple types of yoke slots, each of which can be connected to the inner circumference, outer circumference, or both the inner and outer circumferences of the stator yoke, or can be connected to neither the inner nor the outer circumference of the stator yoke, so that stator teeth can be provided in more positions on the stator yoke to meet different actual motor usage requirements.

[0036] The types of yoke slots can be classified according to the distance of the yoke slot from the axis of the stator core, the shape of the yoke slot or the size of the yoke slot. In the above technical solution, the stator yoke slots specifically include: at least one first yoke slot, which is connected to the outer peripheral surface of the stator yoke; at least two second yoke slots, which are connected to the inner peripheral surface of the stator yoke, and an accommodation space is formed between the ends of at least two stator teeth arranged in the second yoke slots, wherein a second rotating shaft is arranged in the accommodation space, which is at a non-zero angle with at least one of the first rotating shafts, and a second fan is arranged at at least one end of the second rotating shaft.

[0037] In this technical solution, there are two types of stator yoke slots, namely, first yoke slots and second yoke slots, wherein the number of first yoke slots can be one or more, the first yoke slots are connected to the outer circumferential surface of the stator yoke part, the number of second yoke slots is more than one, and the second yoke slots are connected to the inner circumferential surface of the stator yoke part, so that stator teeth are respectively inserted between the first yoke slot and the second yoke slot, and at the same time, a accommodating space is formed between the ends of at least two stator teeth, and a second rotating shaft and a second fan blade fixedly connected to one end of the second rotating shaft are provided in the accommodating space. In this way, on the one hand, the structure is compact and simple, and can also drive the two groups of rotating shafts to rotate. On the other hand, the axial direction of the second rotating shaft can be the same as the axial direction of the stator, and can also be designed to be in a different direction, so that the wind direction can be arbitrarily adjusted with the axial change of the second rotating shaft, thereby improving the flexibility of the fan structure design.

[0038] In the above technical solution, the fan further includes: a casing, which is sleeved outside the motor, the first rotating shaft extends out of the casing, the fan blades are sleeved on the first rotating shaft, and the fan blades are arranged outside the casing.

[0039] In this technical solution, a casing is arranged outside the motor, and the first rotating shaft extends out of the end face of the casing. This can not only protect the motor, but also directly connect the fan to the rotating shaft outside the casing, thereby improving the convenience of installation.

[0040] It should be noted that the first rotating shaft may extend out of the casing through a side wall of the casing, or may extend out through an end surface of the casing.

[0041] Among them, when there are multiple first rotating shafts, at least two first rotating shafts can be arranged in parallel, or at least two first rotating shafts can form a non-zero angle. The casing can be adjusted according to the specific usage scenario to improve the applicability of the product.

[0042] In the above technical solution, the fan further includes: an end cover, which is arranged at at least one end of the casing, and the end cover is provided with a through hole corresponding to the first rotating shaft, and the first rotating shaft passes through the through hole and extends out of the end cover.

[0043] In this technical solution, an end cover is provided at at least one end of the casing to facilitate closing the casing and prevent foreign matter from invading and affecting the operation of the fan; the first rotating shaft extends through the through hole and out of the end cover to facilitate installation of the fan blades, thereby improving the convenience of installation.

[0044] In the above technical solution, the positioning grooves and positioning ribs are matched in shape, wherein one of the positioning grooves and the positioning ribs is arranged on the stator teeth, and the other is arranged on the stator yoke slots and / or stator bosses, so as to limit the position of the stator teeth in the stator yoke part.

[0045] By providing positioning ribs on the stator teeth, providing positioning grooves on the stator yoke slots or the stator bosses, or providing positioning grooves on both the stator yoke slots and the stator bosses, when the stator teeth are assembled with the stator yoke, the positioning ribs are inserted into the positioning grooves to play a limiting role, thereby preventing the stator teeth and the stator yoke from relative movement, thereby improving the stability of the connection between the stator teeth and the positioning yoke.

[0046] Similarly, positioning grooves may be provided on the stator teeth, positioning ribs may be provided on the stator yoke slots or stator bosses, or positioning ribs may be provided on both the stator yoke slots and the stator bosses. When the stator teeth are assembled with the stator yoke, the positioning ribs are inserted into the positioning grooves to serve as a limit, thereby preventing relative movement between the stator teeth and the stator yoke, thereby improving the stability of the connection between the stator teeth and the positioning yoke.

[0047] In the above technical solution, it also includes: the number of the stator components is a first number, the number of the rotors is a second number, the first number is smaller than the second number, and each of the stator components is arranged between any two adjacent rotors; the first number is greater than the second number, and each of the rotors is arranged between any two adjacent stator components.

[0048] In this technical solution, the number of stator assemblies is set to a first number, and the number of rotors is set to a second number. The first number is smaller than the second number, that is, the number of stator assemblies is smaller than the number of rotors, and the stator assemblies are arranged between any two adjacent rotors. Any two adjacent rotors share one stator assembly. The structure is relatively regular, which helps to simplify the structure of the product and facilitates the assembly of the rotor and stator assemblies.

[0049] Alternatively, the number of stator assemblies is greater than the number of rotors, and each rotor is disposed between any two adjacent stator assemblies, that is, any two adjacent stator assemblies share one rotor. This has a more regular structure, helps to simplify the product structure, and facilitates assembly of the rotor and stator assemblies.

[0050] In the above technical solution, the number of the stator assemblies is at least two, the number of stator teeth of at least two of the stator assemblies is the same, or the number of phases of at least two of the stator assemblies is the same; or the number of the stator assemblies is at least two, the number of stator teeth of at least two of the stator assemblies is different, or the number of phases of at least two of the stator assemblies is different.

[0051] In this technical solution, the number of stator assemblies is at least two, and the number of stator teeth of at least two stator assemblies is the same, which facilitates the assembly of the stator teeth and the stator yoke, or the number of phases of at least two stator assemblies is the same, that is, the number of windings on each stator assembly is the same, so that the power level on each stator assembly is the same.

[0052] The number of stator assemblies is at least two, the number of stator teeth of at least two stator assemblies is different, or the number of phases of at least two stator assemblies is different, that is, the number of windings on each stator assembly is different. In this way, the user can meet the actual power requirements by performing reasonable winding on each stator assembly.

[0053] In the above technical solution, there are multiple windings, and each winding is wound on at least one stator tooth.

[0054] In this technical solution, there are multiple windings, and each winding is wound on at least one stator tooth to ensure that the motor can operate normally and can do work to meet the needs of users.

[0055] In the above technical solution, the material of the stator yoke includes at least one of a soft magnetic material or a solid material; the material of the stator teeth includes at least one of a soft magnetic material or a solid material.

[0056] The material of the stator yoke and the material of the stator teeth can be one or more combinations of soft magnetic materials or solid materials. More specifically, the two structures can use at least one of silicon steel sheets made of solid steel and powder formed by soft magnetic materials. For example, the stator yoke uses silicon steel sheets and the stator teeth use soft magnetic powder, or the stator yoke uses soft magnetic powder and the stator yoke uses silicon steel sheets, or any other combination.

[0057] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 is a partial structural schematic diagram of a fan according to an embodiment of the present invention;

[0059] Figure 2 yes Figure 1 A schematic diagram of the structure of the stator yoke of the fan;

[0060] Figure 3 yes Figure 1 Schematic diagram of the stator tooth structure of the fan;

[0061] Figure 4 is a schematic diagram of the exploded structure of a fan according to another embodiment of the present invention;

[0062] Figure 5 is a schematic diagram of the three-dimensional structure of a fan according to another embodiment of the present invention;

[0063] Figure 6 yes Figure 5 A schematic diagram of the structure of the stator yoke of the fan;

[0064] Figure 7 yes Figure 5 Schematic diagram of the stator tooth structure of the fan;

[0065] Figure 8 is a schematic diagram of the three-dimensional structure of a fan according to another embodiment of the present invention;

[0066] Fig. 9 is a schematic diagram of the three-dimensional structure of a fan according to another embodiment of the present invention;

[0067] Fig.10 yes Fig. 9 A schematic diagram of the structure of the stator core of the fan;

[0068] Fig.11 is a schematic diagram of the exploded structure of a fan according to another embodiment of the present invention;

[0069] Fig.12 yes Fig.11 A schematic diagram of the structure of the stator yoke of the fan;

[0070] Fig.13 yes Fig.11 Schematic diagram of the stator tooth structure of the fan;

[0071] Fig.14 is a schematic diagram of the assembly structure of stator teeth according to an embodiment of the present invention;

[0072] Fig.15 yes Fig.14 Schematic diagram of the split structure of the stator teeth shown.

[0073] in, Figures 1 to 15 The corresponding relationship between the reference numerals and component names in the figure is:

[0074] 1 stator core, 11 stator yoke, 111 stator yoke slot, 12 stator tooth, 121 stator tooth body, 1211 positioning rib, 122 stator tooth shoe, 1221 matching rib, 123 matching groove, 13 second stator tooth, 131 second stator tooth body, 132 second stator tooth shoe, 2 rotor, 201 magnetic steel, 202 rotor yoke, 21 winding, fan 3, first blade 31, second blade 32, first rotating shaft 33, second rotating shaft 34, casing 35, end cover 36, bearing 37. DETAILED DESCRIPTION

[0075] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0076] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0077] Refer to the following Figures 1 to 15 A wind turbine according to some embodiments of the present invention is described.

[0078] like Figure 1As shown, the fan 33 provided by the embodiment of the present invention includes: a motor, the motor includes at least one stator assembly and at least one rotor arranged corresponding to the stator assembly, wherein the stator assembly includes a detachably connected stator yoke 11 and at least one stator tooth 12, a winding 21 is wound around the stator tooth 12, the stator yoke 11 is provided with a stator yoke slot 111 and / or a stator boss adapted to the shape of the stator tooth 12, and the stator tooth 12 axially passes through the stator yoke slot 111 and / or the stator boss to form a stator core 1; a first rotating shaft 33, connected to at least one rotor, and a first fan blade 31 is provided at one end of the first rotating shaft 33 to drive the first fan blade 31 to rotate when the first rotating shaft 33 rotates.

[0079] As for the materials of the stator teeth 12 and the stator yoke 11, they are preferably magnetic conductive materials such as silicon steel sheets or soft magnetic materials or solid steel. Since they can achieve the purpose of the present invention, they should all be within the protection scope of the present invention.

[0080] In this embodiment, the stator assembly includes a detachably connected stator yoke 11 and at least one stator tooth 12, a winding 21 is wound on the stator tooth 12, and the stator yoke 11 is provided with a stator yoke slot 111 adapted to the shape of the stator tooth 12, the stator tooth 12 axially passes through the stator yoke slot 111 or is inserted into the stator boss to form a stator core 1, such a structure is simple and compact, the winding process is convenient and easy to operate, and the motor power expansion capability is large; and the rotor and the first fan blade 31 are connected by the first rotating shaft 33, so that when the rotor rotates, the first rotating shaft 33 can drive the first fan blade 31 to rotate, so that the wind force generated by the first fan blade 31 can also expand with the expansion of the motor power.

[0081] The specific structure of the fan 3 provided in the present application is described in detail below in conjunction with some embodiments.

[0082] Embodiment 1

[0083] The stator yoke 11 specifically includes: a plurality of first magnetic conductive sheets, the plurality of first magnetic conductive sheets are stacked along the radial direction or axial direction of the stator core 1, such as Figure 2 shown.

[0084] In this embodiment, the stator yoke 11 specifically includes a plurality of first magnetic conductive sheets. The plurality of first magnetic conductive sheets are stacked along the radial direction or axial direction of the stator core 1, thereby improving the magnetic conductivity of the stator core 1.

[0085] Preferably, the stator yoke 11 is in a circular ring shape, an elliptical ring shape, or a polygonal ring shape, and the stator yoke slot 111 penetrates at least one end surface of the stator yoke 11 in the axial direction.

[0086] In this embodiment, the stator yoke 11 is annular with a relatively regular annular structure, which is convenient for processing and forming and suitable for mass production. Of course, it can also be elliptical or polygonal in shape. The stator yoke slot 111 axially penetrates at least the two end faces of the stator yoke 11, so that the stator teeth 12 pass through the stator yoke slot 111 and are connected to the stator yoke 11, so as to improve the assembly efficiency and connection reliability of the stator teeth 12 and the stator yoke 11.

[0087] Preferably, there is a distance between the stator yoke slot 111 and the outer circumference of the stator yoke portion 11 in the radial direction, and there is a distance between the stator yoke slot 111 and the inner circumference of the stator yoke portion 11 in the radial direction, such as Figure 2 shown.

[0088] In this embodiment, there is a distance between the stator yoke slot 111 and the outer peripheral surface of the stator yoke portion 11 in the radial direction, that is, the stator yoke slot 111 passes through the stator yoke portion 11 and is not connected with the outer peripheral surface of the stator yoke portion 11, and the stator tooth 12 is inserted into the stator yoke slot 111 along the axial direction of the stator yoke portion 11 to be connected with the stator yoke portion 11, thereby preventing the stator tooth 12 from being separated from the stator yoke slot 111 along the outer peripheral surface or inner peripheral surface of the stator yoke portion 11, thereby improving the connection reliability between the stator tooth 12 and the stator yoke portion 11.

[0089] Preferably, the stator yoke slots 111 are connected to both the outer circumference and the inner circumference of the stator yoke portion, and the stator teeth can be inserted into the stator yoke slots axially or radially from the outer circumference to form a complete stator core.

[0090] Embodiment 2

[0091] The difference from the first embodiment is that the stator yoke slot 111 is connected to the outer peripheral surface of the stator yoke part 11. Fig.11 shown.

[0092] The stator yoke slot 111 is connected to the outer circumference of the stator yoke part 11, so the stator tooth 12 can be inserted into the stator yoke slot 111 from the outer circumference or inner circumference of the stator yoke part 11. The connection method is flexible and convenient for assembly between the stator tooth 12 and the stator yoke part 11.

[0093] Among them, when using Fig.11 In the stator yoke shown, two disc rotors may be provided on the same side of the stator yoke, and rotors may also be provided on opposite sides of the stator yoke, that is, one rotor is provided on each side, which may be a disc rotor or a radial rotor.

[0094] Embodiment 3

[0095] The difference from the second embodiment is that the stator yoke slot 111 is connected to the inner circumference of the stator yoke portion 11. Figure 6 shown.

[0096] The stator yoke slot 111 is connected to the inner circumference of the stator yoke part 11, so the stator tooth 12 can be inserted into the stator yoke slot 111 from the outer circumference or inner circumference of the stator yoke part 11. The connection method is flexible and convenient for assembly between the stator tooth 12 and the stator yoke part 11.

[0097] Preferably, the stator boss is formed by extending the outer peripheral surface of the stator yoke 11 radially outward.

[0098] The stator boss is formed by radially extending outward from the outer peripheral surface of the stator yoke 11. Preferably, a groove is provided on the stator tooth 12. When the stator tooth 12 is connected to the stator yoke 11, the groove on the stator tooth 12 is inserted into the stator boss on the outer peripheral surface of the stator yoke 11 to achieve quick assembly of the stator tooth 12 and the stator yoke 11.

[0099] Embodiment 4

[0100] The difference from the third embodiment is that the stator boss is formed by extending the inner circumferential surface of the stator yoke 11 inwardly in the radial direction.

[0101] Of course, the stator boss can also be formed by extending radially inward from the inner circumference of the stator yoke 11. Preferably, a groove is provided on the stator tooth 12. When the stator tooth 12 is connected to the stator yoke 11, the groove on the stator tooth 12 is inserted into the stator boss on the inner circumference of the stator yoke 11 to achieve quick assembly of the stator tooth 12 and the stator yoke 11.

[0102] Preferably, the stator tooth 12 specifically includes: a stator tooth body 121, including a plurality of second magnetic conductive sheets, the plurality of second magnetic conductive sheets are stacked along the radial or circumferential direction of the stator core 1, wherein the stacking direction of the second magnetic conductive sheets is perpendicular to the stacking direction of the first magnetic conductive sheets.

[0103] In this embodiment, the stator tooth 12 specifically includes a stator tooth body 121 , and the stator tooth body 121 includes a plurality of second magnetic conductive sheets. By stacking the plurality of second magnetic conductive sheets along the radial or circumferential direction of the stator core 1 , the magnetic conductivity of the stator core 1 is further improved.

[0104] Furthermore, the stator tooth 12 further includes: a stator tooth shoe 122 , which is disposed at an end of the stator tooth body 121 , and the stator tooth shoe 122 is detachably connected to the stator tooth body 121 .

[0105] The stator tooth 12 also includes a stator tooth shoe 122 arranged at the end of the stator tooth body 121, and is detachably connected to the stator tooth body 121. After the winding 21 is wound on the stator tooth body 121, the stator tooth shoe 122 is then connected to the stator tooth body 121, thereby fixing the winding 21 and preventing the winding 21 from separating from the stator tooth body 121, thereby further improving the assembly efficiency of the winding 21 and the stator tooth 12.

[0106] It is worth noting that the materials of the stator tooth body and the stator tooth shoe can be the same or different.

[0107] Embodiment 5

[0108] The difference from the fourth embodiment is that the stator tooth shoe 122 and the stator tooth body 121 are integrally formed. Figure 3 shown.

[0109] In this embodiment, the stator tooth shoe 122 and the stator tooth body 121 are integrally formed, which simplifies the structure of the product, improves the integrity of the product, and eliminates the step of connecting the stator tooth shoe 122 and the stator tooth body 121, further improving the assembly efficiency of the product.

[0110] Preferably, there is one stator tooth shoe 122 , which is disposed at one end of the stator tooth body 121 ; or there are two stator tooth shoes 122 , which are respectively disposed at both ends of the stator tooth body 121 .

[0111] The number of stator tooth shoes 122 provided on each stator tooth body 121 can be adjusted according to actual needs. Specifically, one stator tooth shoe 122 can be provided on one stator tooth body 121 , and two stator tooth shoes 122 can be provided on one stator tooth body 121 .

[0112] It should be noted that the two stator tooth shoes 122 can be respectively disposed on the two end surfaces of the stator tooth body 121 .

[0113] Wherein, in another embodiment, Fig.14 and Fig.15 As shown, the stator tooth body 121 is in the shape of a straight tooth, and a positioning rib 123 is provided on the stator tooth body 121. The stator tooth body 121 is not provided with a matching rib or matching groove that matches with the stator tooth shoe 122. The stator tooth shoe 122 is directly sleeved on one end of the stator tooth body 121, and its matching position is limited to the matching degree that the upper end surfaces of the two are parallel.

[0114] Preferably, it also includes: a positioning groove and a positioning rib 1211 of matching shapes, wherein one of the positioning groove and the positioning rib 1211 is arranged on the stator tooth 12, and the other is arranged on the stator yoke slot 111 and / or the stator boss to limit the position of the stator tooth 12 in the stator yoke 11.

[0115] By providing a positioning rib 1211 on the stator tooth body 121, providing a positioning groove on the stator yoke slot or the stator boss, or providing a positioning groove on both the stator yoke slot 111 and the stator boss, when the stator tooth 12 is assembled with the stator yoke 11, the positioning rib 1211 is inserted into the positioning groove to play a limiting role, thereby preventing the stator tooth 12 and the stator yoke 11 from relative movement, thereby improving the stability of the connection between the stator tooth 12 and the positioning yoke 11.

[0116] Similarly, a positioning groove may be provided on the stator tooth body 121, a positioning rib 1211 may be provided on the stator yoke slot 111 or the stator boss, or a positioning rib 1211 may be provided on both the stator yoke slot 111 and the stator boss. When the stator tooth 12 is assembled with the stator yoke 11, the positioning rib 1211 is inserted into the positioning groove to play a limiting role, thereby preventing the stator tooth 12 from moving relative to the stator yoke 11, thereby improving the stability of the connection between the stator tooth 12 and the positioning yoke 11.

[0117] Preferably, the stator assembly also includes: a matching mating groove 123 and a matching rib 1221, wherein one of the mating groove 123 and the matching rib 1221 is arranged on the stator tooth body 121, and the other is arranged on the stator tooth shoe 122, so as to realize the connection between the stator tooth shoe 122 and the stator tooth body 121 through the mating of the mating groove 123 and the matching rib 1221.

[0118] By providing a matching rib 123 on the stator tooth body 121 and providing a matching groove 1211 on the stator tooth shoe 122, when the stator tooth shoe 122 is assembled with the stator tooth body 121, the matching rib 1221 is directly inserted into the matching groove 123 to limit the relative movement between the stator tooth shoe 122 and the stator tooth body 121, thereby improving the assembly efficiency of the stator tooth shoe 122 and the stator tooth body 121 and improving the stability of the connection between the stator tooth shoe 122 and the stator tooth body 121.

[0119] Preferably, there are multiple stator yoke slots 111 and / or stator bosses, and the multiple stator yoke slots 111 and / or stator bosses are evenly arranged on the stator yoke part 11 around the axis of the stator core 1 .

[0120] In this embodiment, the number of stator yoke slots 111 is multiple. By evenly arranging multiple stator yoke slots 111 or stator bosses on the stator yoke part 11 around the axis of the stator core 1, the structure of the product is more regular, and the number of stator yoke slots 111 or stator bosses is increased. Correspondingly, the number of stator teeth 12 is also multiple, and multiple stator teeth 12 are inserted into the corresponding multiple stator yoke slots 111, thereby increasing the number of windings 21, which in turn helps to improve the power level of the stator core 1.

[0121] Preferably, the stator yoke slot 111 specifically includes: a first yoke slot, which is connected to the outer circumference of the stator yoke portion 11; a second yoke slot, which is connected to the inner circumference of the stator yoke portion 11, such as Fig.12 shown.

[0122] In this embodiment, by setting the stator yoke slot 111 to include a first yoke slot connected to the outer circumferential surface of the stator yoke portion 11, and a second yoke slot connected to the inner circumferential surface of the stator yoke portion 11, more stator teeth 12 can be arranged on the stator yoke portion 11, the structure is more compact, and the distribution of the stator teeth 12 is more uniform, which is conducive to further expanding the motor power.

[0123] Preferably, the number of the second yoke slots is at least two, and an accommodating space is formed between the stator tooth shoes 122 of at least two stator teeth 12 arranged in the second yoke slots, wherein a second rotating shaft 34 and a first fan blade 32 fixedly connected to one end of the second rotating shaft 34 are provided in the accommodating space.

[0124] In this embodiment, a receiving space is formed between the two stator tooth shoes 122, and a second rotating shaft 34 and a first fan blade 32 fixedly connected to one end of the second rotating shaft 34 are provided in the receiving space. Thus, on the one hand, the structure is compact and simple, and on the other hand, the axial direction of the second rotating shaft 34 can be the same as the axial direction of the stator, or can be designed to be in a different direction, so that the wind direction can be arbitrarily adjusted with the axial change of the second rotating shaft 34, thereby improving the flexibility of the structural design of the fan 3.

[0125] Embodiment 6

[0126] The difference from any of the above embodiments is that: on the basis of any of the above embodiments, further, the fan 3 also includes: a fixing shell, which is arranged on the stator core 1 to fix the stator core 1.

[0127] In this embodiment, the stator core 1 is fixed by a fixing shell, so that the stator core 1 can be protected to avoid interference or intrusion by foreign objects, and the working stability and reliability of the stator core 1 can be improved.

[0128] Embodiment 7

[0129] The difference from the sixth embodiment is that: on the basis of the sixth embodiment, further, the fan 3 further includes: a casing 35 which is sleeved outside the motor, and the first rotating shaft 33 extends out of the casing 35 .

[0130] In this embodiment, a casing 35 is provided outside the motor, and the first rotating shaft 33 extends out of the end surface of the casing 35. This can not only protect the motor, but also directly connect the fan 3 to the rotating shaft outside the casing 35, thereby improving the convenience of installation.

[0131] It should be noted that the first rotating shaft 33 may extend out of the housing 35 through a side wall of the housing, and may also extend out through an end surface of the housing 35 .

[0132] When there are multiple first rotation axes 33 , at least two first rotation axes 33 are parallel to each other, or at least two first rotation axes 33 form a non-zero angle with each other.

[0133] Embodiment 8

[0134] The difference from Embodiment 7 is that, based on Embodiment 7, further, the fan 3 also includes: an end cover 36, which is arranged at at least one end of the casing 35, and the end cover 36 is provided with a through hole corresponding to the first rotating shaft 33, and the first rotating shaft 33 extends out of the end cover 36 through the through hole.

[0135] In this embodiment, an end cover 36 is provided at at least one end of the casing 35 to facilitate closing the casing 35 and prevent foreign matter from invading and affecting the operation of the fan 3; the first rotating shaft 33 extends through the through hole and out of the end cover 36 to facilitate installation of the fan blades, thereby improving the convenience of installation.

[0136] Preferably, it also includes: the number of stator assemblies is a first number, the number of rotors 2 is a second number, the first number is smaller than the second number, and each stator assembly is arranged between any two adjacent rotors 2; the first number is greater than the second number, and each rotor 2 is arranged between any two adjacent stator assemblies.

[0137] In this embodiment, the number of stator assemblies is set to a first number, and the number of rotors 2 is set to a second number. The first number is smaller than the second number, that is, the number of stator assemblies is smaller than the number of rotors 2, and the stator assembly is arranged between any two adjacent rotors. Any two adjacent rotors 2 share one stator assembly, and the structure is relatively regular, which helps to simplify the structure of the product and facilitates the assembly of the rotor 2 and the stator assembly.

[0138] Embodiment 9

[0139] The difference from the eighth embodiment is that the number of stator assemblies is greater than the number of rotors, and each rotor 2 is arranged between any two adjacent stator assemblies, that is, any two adjacent stator assemblies share one rotor, which has a more regular structure, helps to simplify the structure of the product, and facilitates the assembly of the rotor and stator assemblies.

[0140] Preferably, the number of stator assemblies is at least two, the number of stator teeth 12 of at least two stator assemblies is the same, or the number of phases of at least two stator assemblies is the same; or the number of stator assemblies is at least two, the number of stator teeth 12 of at least two stator assemblies is different, or the number of phases of at least two stator assemblies is different.

[0141] In this embodiment, the number of stator assemblies is at least two, and the number of stator teeth 12 of at least two stator assemblies is the same, which facilitates the assembly of the stator teeth 12 and the stator yoke 11, or the number of phases of at least two stator assemblies is the same, that is, the number of windings 21 on each stator assembly is the same, so that the power level on each stator assembly is the same.

[0142] The number of stator assemblies is at least two, the number of stator teeth 12 of at least two stator assemblies is different, or the number of phases of at least two stator assemblies is different, that is, the number of windings 21 on each stator assembly is different. In this way, the user can meet the actual power requirements by performing reasonable winding 21 on each stator assembly.

[0143] Preferably, there are multiple rotors, and at least two rotors have the same number of pole pairs.

[0144] In this embodiment, the number of rotors is set to be multiple, and the rotating shafts of at least two rotors can be coaxially arranged, parallelly arranged, or vertically arranged. The arrangement methods are diverse and the installation method is relatively flexible.

[0145] Embodiment 10

[0146] The difference from the ninth embodiment is that there are multiple rotors 2, and at least two rotors 2 have different numbers of pole pairs.

[0147] In this embodiment, there are multiple rotors 2, and at least two rotors 2 can be set with the same number of pole pairs so that the rotational speeds of the at least two rotors 2 are the same, so that the at least two rotors 2 do the same work. Different numbers of pole pairs can also be set so that the rotational speeds of the at least two rotors 2 are different, so that the at least two rotors 2 do different work, to meet the needs of different working conditions.

[0148] There is no limitation on the type of the rotor 2. One or more rotors 2 may be permanent magnet rotors, squirrel cage rotors, or salient pole rotors. Since all of them can achieve the purpose of the present invention, they should all be within the protection scope of the present invention.

[0149] Preferably, there are multiple windings 21 , and each winding 21 is wound around at least one stator tooth 12 .

[0150] In this embodiment, there are multiple windings 21, and each winding 21 is wound around at least one stator tooth 12 to ensure that the motor can operate normally and can do work to meet the needs of users.

[0151] Preferably, the fan 3 also includes at least one bearing 37, which connects the rotating part and the stationary part of the motor. The bearing 37 can be a ball bearing, a deep groove ball bearing, a thrust bearing, etc. Since they can all achieve the purpose of the present invention, they should all be within the protection scope of the present invention.

[0152] In the above-mentioned specific embodiment, there are two types of yoke slots, including a first yoke slot and a second yoke slot, the first yoke slot is connected to the outer peripheral surface, and the second yoke slot is connected to the inner peripheral surface; in another specific embodiment, the first yoke slot is connected to the outer peripheral surface, and the second yoke slot is connected to the inner and outer peripheral surfaces; in another specific embodiment, the first yoke slot and the second yoke slot are spaced apart from the inner and outer peripheral surfaces; in another specific embodiment, the first yoke slot and the second yoke slot are both connected to the outer peripheral surface; in another specific embodiment, the first yoke slot and the second yoke slot are both connected to the inner peripheral surface, and the first yoke slot and the second yoke slot are spaced apart from the inner and outer peripheral surfaces.

[0153] In another specific embodiment, there are N types of yoke slots, and the location of each yoke slot can be connected to the outer peripheral surface, connected to the inner peripheral surface, connected to both the inner and outer peripheral surfaces, and have a spacing with the inner and outer peripheral surfaces.

[0154] The specific structure of the fan provided by the present application is described in detail below in conjunction with some specific embodiments.

[0155] Embodiment 1

[0156] like Figures 1 to 3 As shown, the fan 3 provided by the embodiment of the present invention includes: a motor, the motor includes a stator assembly and a rotor 2 (including a magnetic steel 201 and a rotor yoke 202) arranged corresponding to the stator assembly, wherein the stator assembly includes a detachably connected stator yoke portion 11 and at least one stator tooth 12, a winding 21 is wound around the stator tooth 12, the stator yoke portion 11 is provided with a stator yoke slot 111 adapted to the shape of the stator tooth 12, and the stator tooth 12 passes through the stator yoke slot 111 to form a stator core 1; a first rotating shaft 34, which is connected to the rotor 2, and a first fan blade 31 is provided at one end of the first rotating shaft 34 to drive the first fan blade 31 to rotate when the first rotating shaft 34 rotates.

[0157] Embodiment 2

[0158] like Figure 4 As shown, the difference from the first embodiment is that two fans 3 of the structure as shown in the first embodiment are used and arranged back to back, that is, the two fans 3 share a stator yoke 11, and asymmetric stator yoke slots 111 are respectively provided at both ends of the stator yoke 11.

[0159] Embodiment 3

[0160] like Figures 5 to 7 As shown, the difference from the first embodiment is that both ends of the stator teeth 12 extend out of the stator yoke 11, and windings 21 are respectively arranged around both ends, and two rotors 2 are arranged at both ends of the stator assembly.

[0161] Embodiment 4

[0162] like Figure 8As shown, the difference from the third embodiment is that the fan 3 includes two stator assemblies and a rotor 2 arranged between the two stator assemblies, two windings 21 are arranged at one end of the two stator assemblies away from the rotor 2, and a first fan blade 31 is arranged on the outer sleeve of the rotor 2.

[0163] Embodiment 5

[0164] like Fig. 9 and Fig.10 As shown, this embodiment provides a stator assembly specifically for a fan 3, wherein the stator teeth 12 are spoon-shaped, the stator yoke 11 is annular, the stator teeth 12 pass through the annular stator yoke 11, and a plurality of stator tooth shoes 122 are wound around the rotor 2 at the center of the annular stator yoke 11.

[0165] Embodiment 6

[0166] like Figures 11 to 13 As shown, the difference from the first embodiment is that: on the basis of the first embodiment, further, a new type of fan 3 is added on the right side of the stator yoke 11, specifically, the stator core 1 includes a stator tooth 12 and a second stator tooth 13, the second stator tooth 13 includes a second stator tooth body 131 and a second stator tooth body 132, the stator tooth 12 passes through the stator yoke slot 111 connected to the outer peripheral surface of the stator yoke 11, one end of the second stator tooth 13 passes through the stator groove 111 connected to the inner peripheral surface of the stator yoke 11, and the other end extends to the right, and an accommodating space for accommodating the rotor 2 is provided between the two second stator tooth shoes 132, the rotor 2 and the bearing 37 are arranged in the space, and a fan blade is provided at one end of the bearing 37.

[0167] To summarize, the wind turbine provided by the present invention comprises a stator assembly including a detachably connected stator yoke and at least one stator tooth, a winding is wound around the stator tooth, and the stator yoke is provided with a stator yoke slot matched with the shape of the stator teeth, and the stator teeth pass through the stator yoke slot to form a stator core. Such a structure is simple and compact, the winding process is convenient and easy to operate, and the motor power expansion capability is large; and the rotor and the first fan blade are connected by a first rotating shaft, so that when the rotor rotates, the first fan blade can be driven to rotate by the first rotating shaft, so that the wind force generated by the first fan blade can also expand with the expansion of the motor power.

[0168] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0169] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying 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 unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0170] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0171] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fan, characterized in that: include: A motor, the motor comprising at least one stator assembly and at least one rotor arranged corresponding to the stator assembly, wherein the stator assembly comprises a detachably connected stator yoke and at least one stator tooth, a winding is wound around the stator tooth, the stator yoke is provided with a stator yoke slot adapted to the shape of the stator tooth, and the stator tooth passes through the stator yoke slot in the axial direction to form a stator core; A first rotating shaft connected to at least one of the rotors, and a first blade is provided at one end of the first rotating shaft to drive the first blade to rotate when the first rotating shaft rotates; The stator yoke slot specifically includes: at least one first yoke slot, which is connected to the outer circumference of the stator yoke portion; at least two second yoke slots, which are connected to the inner circumference of the stator yoke portion, wherein the stator teeth are respectively inserted between the first yoke slot and the second yoke slot, and an accommodation space is formed between the ends of at least two stator teeth provided in the second yoke slots. Wherein, a second rotating shaft which forms a non-zero angle with at least one of the first rotating shafts is provided in the accommodating space, and a second fan blade is provided at at least one end of the second rotating shaft.

2. The fan according to claim 1, characterized in that: The stator yoke specifically comprises: A plurality of first magnetic conductive sheets are stacked along the radial direction or the axial direction of the stator core.

3. The fan according to claim 1, characterized in that: The stator yoke is in a circular ring shape, an elliptical ring shape, or a polygonal ring shape, and the stator yoke slot penetrates at least one end surface of the stator yoke along the axial direction.

4. The fan according to claim 1, characterized in that: The stator yoke specifically comprises: A plurality of first magnetic conductive sheets, wherein the plurality of first magnetic conductive sheets are stacked along the radial direction or the axial direction of the stator core; The stator teeth specifically include: The stator tooth body comprises a plurality of second magnetic conductive sheets, and the plurality of second magnetic conductive sheets are stacked along the radial direction or circumferential direction of the stator core.

5. The fan according to claim 4, characterized in that: The lamination direction of the second magnetic conductive sheets is perpendicular to the lamination direction of the first magnetic conductive sheets.

6. The fan according to claim 4, characterized in that: The stator teeth further include: The stator tooth shoe is arranged at the end of the stator tooth body, and the stator tooth shoe is detachably connected to the stator tooth body.

7. The fan according to claim 6, characterized in that: The stator tooth shoe is integrally formed with the stator tooth body.

8. The fan according to claim 6, characterized in that: The number of the stator tooth shoe is one, and the stator tooth shoe is arranged at one end of the stator tooth body; or The number of the stator tooth shoes is two, and one stator tooth shoe is respectively provided at both ends of the stator tooth body.

9. The fan according to claim 1, characterized in that: The number of the stator yoke slots is multiple, and the multiple stator yoke slots are evenly arranged on the stator yoke part around the axis of the stator core.

10. The fan according to claim 1, characterized in that: Also includes: The casing is sleeved outside the motor, the first rotating shaft extends out of the casing, the fan blades are sleeved on the first rotating shaft, and the fan blades are arranged outside the casing.

11. The fan according to claim 10, characterized in that: Also includes: An end cover is arranged at at least one end of the housing, and a through hole corresponding to the first rotating shaft is arranged on the end cover, and the first rotating shaft passes through the through hole and extends out of the end cover.

12. The fan according to claim 1, characterized in that: Also includes: A positioning groove and a positioning rib with matching shapes, wherein one of the positioning groove and the positioning rib is arranged on the stator tooth, and the other is arranged on the stator yoke slot, so as to limit the position of the stator tooth in the stator yoke part.

13. The fan according to claim 1, characterized in that: Also includes: The number of the stator assemblies is a first number, the number of the rotors is a second number, The first number is smaller than the second number, and each of the stator assemblies is disposed between any two adjacent rotors; The first number is greater than the second number, and each of the rotors is disposed between any two adjacent stator assemblies.

14. The fan according to claim 1, characterized in that: The number of the stator assemblies is at least two, the number of stator teeth of at least two of the stator assemblies is the same, or the number of phases of at least two of the stator assemblies is the same; or The number of the stator assemblies is at least two, the number of stator teeth of at least two of the stator assemblies is different, or the number of phases of at least two of the stator assemblies is different.

15. The fan according to claim 1, characterized in that: There are multiple windings, and each winding is wound around at least one stator tooth.

16. The fan according to claim 1, characterized in that: The material of the stator yoke and the stator teeth includes at least one of a soft magnetic material or a solid material.

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