A blower and a cleaning device

Abstract

The present invention discloses a fan and a cleaning device. The fan includes: a fluid module (1) for generating an air flow and guiding the air flow, the fluid module (1) including a diffuser (12), and the diffuser (12) having a first positioning mechanism (121); a stator module (2) detachably connected to the diffuser (12), and the stator module (2) being provided with a second positioning mechanism (211) adapted to the first positioning mechanism (121). The fan adopts a modular structure, is simple to assemble and suitable for mechanized production.

Description

Technical Field

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

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Fan is the customary abbreviation for gas compression and gas delivery machinery in China. The fans usually include ventilators, blowers, and wind turbines.

[0003] Fans are mainly used for ventilation in various fields of the national economy such as metallurgy, petrochemicals, electric power, urban rail transit, textiles, ships, etc., as well as in various places. In addition to traditional application areas, there are still great development prospects in more than 20 potential market areas such as comprehensive utilization of coal gangue, new dry clinker technology transformation, energy conservation in the metallurgical industry, and comprehensive utilization of resources.

[0004] In addition, fans are also used in residents' home life. Some commonly used household appliances also use fans, such as vacuum cleaners. However, the fans used in existing vacuum cleaners have complex structures and cumbersome assembly, which is not conducive to mechanized production. In addition, the existing fans are noisy, which affects people's use. Summary of the invention

[0005] (I) Purpose of the invention

[0006] The purpose of the present invention is to provide a fan and a vacuum cleaner to solve the problems of inconvenient assembly and high noise of the fan in the prior art.

[0007] (II) Technical solution

[0008] To solve the above problems, the first aspect of the present invention provides a fan, comprising: a fluid module, used to generate airflow and guide the airflow, the fluid module includes fan blades and a diffuser, and the diffuser has a first positioning mechanism; a stator module, which is detachably connected to the diffuser, and the stator module is provided with a second positioning mechanism compatible with the first positioning mechanism.

[0009] Furthermore, the fluid module further comprises: an optical axis and a rotor sleeved on the optical axis; the rotor rotates under the drive of the stator module, and correspondingly drives the fan blades to rotate, thereby generating airflow.

[0010] Further, the diffuser is an axial diffuser, and the axial diffuser includes: an outer cylinder, a main body portion disposed inside the outer cylinder, and a plurality of diffuser vanes; the plurality of diffuser vanes connect the outer cylinder and the main body portion, and the plurality of diffuser vanes divide the annular space between the outer cylinder and the main body portion into a plurality of diffusing air ducts. The main body portion has a central shaft hole, and the main body portion is sleeved on the optical axis through the central shaft hole.

[0011] Further, the outer diameter of the main body portion of the axial diffuser is equal to the outer diameter of the motor stator, so that the air flowing out of the diffusing air duct flows through the outside of the motor stator.

[0012] Further, the first positioning mechanism is formed by partial diffuser vanes among the diffuser vanes of the axial diffuser extending along the axial direction of the axial diffuser.

[0013] Further, the stator module includes: a motor stator, which is provided with a second positioning mechanism adapted to the first positioning mechanism.

[0014] Further, the motor stator includes: a stator outer ring in a circular ring shape, and a plurality of stator teeth evenly distributed and connected in the circumferential direction on the inner side thereof; the stator teeth are arranged along the radial direction of the stator outer ring; a winding group coil, the number of which corresponds to that of the stator teeth, and each stator tooth is sleeved with a winding group coil; wherein, a second positioning mechanism adapted to the first positioning mechanism is provided on the yoke portion of the stator outer ring.

[0015] Further, the second positioning mechanism is formed by the inward depression of the yoke portion of the stator outer ring.

[0016] Further, the second positioning mechanism is a positioning groove, the wall surface of the positioning groove is a cylindrical surface, the first positioning mechanism is a semi-cylinder, and a cylindrical surface adapted to the wall surface of the positioning groove is provided on the side of the first positioning mechanism close to the positioning groove.

[0017] Further, the stator module further includes: a PCB circuit board, which is detachably connected to the motor stator; both ends of each winding group coil extend along the axial direction of the motor stator to the side connected to the PCB circuit board; the PCB circuit board is provided with a connection circuit for the winding group coils of the same phase, and the winding group coils belonging to the same phase are connected through the PCB circuit board.

[0018] According to another aspect of the present invention, a cleaning device provided with the blower according to any one of the above technical solutions is further provided.

[0019] (III) Beneficial effects

[0020] The above technical solution of the present invention has the following beneficial technical effects:

[0021] This technical solution adopts a modular structure, and the assembly is simple and suitable for mechanized production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a blower according to the first embodiment of the present invention;

[0023] Figure 2 is an exploded schematic structural diagram of a blower according to an alternative embodiment of the present invention;

[0024] Figure 3 is a schematic cross-sectional structural diagram of a blower according to an alternative embodiment of the present invention;

[0025] Figure 4 is Figure 3 an enlarged view of part A in

[0026] Figure 5 is Figure 3 an enlarged view of part B in

[0027] Figure 6 shows an end face schematic diagram of the assembly of a blower blade and a diffuser in a blower according to an alternative embodiment of the present invention;

[0028] Figure 7 is a schematic cross-sectional structural diagram of a blower according to an alternative embodiment of the present invention;

[0029] Figure 8 is a schematic structural diagram of a motor stator according to an alternative embodiment of the present invention;

[0030] Figure 9 is a schematic structural diagram of a stator unit connected in series according to an alternative embodiment of the present invention;

[0031] Figure 10 is a schematic circuit diagram of a three-phase motor stator according to an alternative embodiment of the present invention;

[0032] Figure 11 is a schematic circuit diagram of a three-phase motor stator according to an alternative embodiment of the present invention.

[0033] Reference Signs:

[0034] 1: Fluid module; 2: Stator module; 11: Fan blade; 12: Diffuser; 13: Air duct cover; 14: Rotor; 15: Bearing; 16: Annular gridless channel; 17: Impeller chamber; 18: Optical axis; 21: Motor stator; 22: PCB circuit board; 121: First positioning mechanism; 122: Outer cylinder; 123: Main body; 124: Diffuser blade; 125: Diffusion air duct; 126: Central shaft hole; 127: Connection hole; 128: First annular protrusion; 131: Air inlet; 132: Second annular protrusion; 211: Second positioning mechanism; 212: Connection column; 213: Stator outer ring; 214: Stator tooth; 215: Winding group coil; 216: Stator slot; 2131: Stator unit; 2141: Arc structure; 2151: First coil; 2152: Second coil; 2153: Third coil; 2154: Fourth coil; 2155: Fifth coil; 2156: Sixth coil; 2161: Stator slot notch. Detailed implementation

[0035] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the specific implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0036] Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0037] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] As Figure 1 shown, in the first aspect of the embodiment of the present invention, a fan is provided, including: a fluid module 1 for generating an air flow and guiding the air flow, the fluid module 1 including a fan blade 11 and a diffuser 12, and the diffuser 12 is provided with a first positioning mechanism 121; a stator module 2 detachably connected to the diffuser 12, and the stator module 2 is provided with a second positioning mechanism 211 adapted to the first positioning mechanism 121.

[0039] As Figures 2 - 7 shown, in an alternative embodiment of the present invention, the fluid module 1 further includes: an optical axis 18 and a rotor 14 sleeved on the optical axis 18; the rotor 14 rotates under the drive of the stator module 2, and correspondingly drives the fan blade 11 to rotate, thereby generating an air flow, and the rotor 14 is a permanent magnet with two poles.

[0040] Optionally, the diffuser 12 is an axial diffuser 12, and the axial diffuser 12 includes: an outer cylinder 122, a main body portion 123 disposed within the outer cylinder 122, and a plurality of diffuser vanes 124; the plurality of diffuser vanes 124 connect the outer cylinder 122 and the main body portion 123, and the plurality of diffuser vanes 124 divide the annular space between the outer cylinder 122 and the main body portion 123 into a plurality of diffusing air ducts 125. The main body portion 123 has a central shaft hole 126, and the main body portion 123 is sleeved on the optical axis 18 through the central shaft hole 126. In the fan provided by the embodiment of the present application, the radial diffusion is cancelled, and the axial diffuser 12 is adopted. After the chaotic air flow coming out of the fan blades 11 passes through the annular gridless channel 16, it directly enters the axial diffuser 12. After being guided by the diffuser vanes 124 of the axial diffuser 12, the flow tends to be stable, and the generation of vortices in the flow channel is reduced. The radial diffusion is cancelled, which can effectively reduce the wind resistance, reduce the energy loss, and improve the working efficiency of the fan. The "static-dynamic clearance" is increased, so that the "static-dynamic interference" effect during the operation of the fan is weakened, and the generation of fan noise is reduced. Generally, the radial diffuser 12 forms a radial air duct by arranging axial diffusing vanes at the position of the annular gridless channel 16 provided in the present application, and is often very close to the blades. The air directly impacts the leading edge of the radial diffuser vanes 124 after coming out of the fan blades 11, resulting in strong "static-dynamic interference". A large number of documents prove that the "static-dynamic interference" generated by the rotor 14 and the motor stator 21 blades is an important part of the fan noise. The fan in the embodiment of the present application cancels the radial diffuser 12 and adopts the axial diffuser 12 to increase the "static-dynamic clearance", which is a very effective means to improve the fan noise. Since the radial diffuser 12 is cancelled, the diameter of the fan can be correspondingly reduced. It avoids problems such as the reduction of the bearing 15 life and the increase of the fan noise caused by the increase of the fan diameter and the consequent increase in power.

[0041] Optionally, the fluid module 1 further includes: an air inlet cover 13, which is fixedly connected to the axial diffuser 12. A fan blade chamber and an annular gridless channel 16 surrounding the fan blade chamber are formed between the air inlet cover 13 and the axial diffuser 12. The annular gridless channel 16 communicates the fan blade chamber and the diffusing air duct 125. The air inlet cover 13 has an air inlet 131; a fan blade 11, which is disposed in the fan blade chamber. The fan blade 11 is used to introduce air from the air inlet 131, and under the drive of the fan blade 11, the air enters the diffusing air duct 125 through the annular gridless channel 16 and flows out from the other end of the diffusing air duct 125.

[0042] Optionally, the outer diameter of the main body portion 123 of the axial diffuser 12 is equal to the outer diameter of the motor stator 21, so that the air flowing out of the diffuser air duct 125 flows through the outside of the motor stator 21. In the embodiment of the present application, the outer diameter of the main body portion 123 of the axial diffuser 12 is equal to the outer diameter of the motor stator 21, which can enable the fluid to flow out of the outer ring of the motor stator 21 unobstructed through the axial diffuser 12. Flowing through the outside of the motor stator 21 reduces the wind resistance and improves the fluid efficiency. In the embodiment of the present application, the outer diameter of the main body portion 123 of the axial diffuser 12 is equal to the outer diameter of the motor stator 21, but not absolutely equal, and a certain error is allowed. For example, the error between the two is 1%, 3%, 5%, 7%, 10%, etc.

[0043] Optionally, the end face of the outer cylinder 122 close to the air mask 13 has a first annular protrusion 128, so that the end face of the outer cylinder 122 forms a first stepped surface, and an annular protrusion extends axially on one side of the outer wall surface of the outer cylinder 122; the air mask 13 has a second annular protrusion 132, so that the end face of the air mask 13 connected to the outer cylinder 122 forms a second stepped surface, and the second stepped surface is adapted to the first stepped surface. Setting a stepped surface at the connection part of the outer cylinder 122 and the air mask 13 can make the inner wall surface of the connection part of the air mask 13 and the outer cylinder 122 smoother, reducing the interference to the fluid.

[0044] Optionally, the number of the fan blades 11 is an odd number. For example, the number of the fan blades 11 is 3, 5, 7, 9, 11, etc. The number of the fan blades 11 being an odd number can reduce the asymmetric injection residual stress and reduce resonance.

[0045] Optionally, the number of the fan blades 11 and the number of the diffuser blades 124 are not multiples of each other. The number of the diffuser blades 124 is selected to be a number that cannot divide the number of the fan blades 11, which can reduce the air noise. For example, the number of the fan blades 11 is, and the number of the diffuser blades 124 is.

[0046] Optionally, the number of the diffuser blades 124 is a multiple of 3. The number of the diffuser blades 124 being a multiple of 3 facilitates the setting of the positioning posts. Three positioning posts can ensure the positioning of the axial diffuser 12 and the motor stator 21. The positioning posts are evenly distributed on the circumference to facilitate the assembly of the axial diffuser 12 and the motor stator 21. When the positioning posts are formed by extending from the diffuser blades 124, the number of the diffuser blades 124 being a multiple of 3 can ensure the even distribution of the positioning posts. The number of the diffuser blades 124 can be 9, 12, 15, etc. Of course, in the embodiment of the present application, the number of the diffuser blades 124 other than multiples of 3 is not excluded.

[0047] Optionally, the number of the fan blades 11 is less than the number of the diffuser blades 124. While the number of the fan blades 11 meets the air extraction efficiency, the number of the diffuser blades 124 also meets the rectification efficiency. In some embodiments, the number is .

[0048] Optionally, the diffuser blades 124 may be arranged at an angle, that is, the diffuser blades 124 are not parallel to the axis of the axial diffuser 12. The axis of the diffuser duct 125 is also not parallel to the axis of the axial diffuser 12. In an exemplary embodiment, the angle formed between the axis of the diffuser duct 125 and the axis of the axial diffuser 12 may be 10°-45°.

[0049] Optionally, the axial diffuser 12 is assembled on the motor shaft through a bearing 15. The fan blades 11 are fixed on the motor. The fan in the vacuum cleaner cleaning device provided in the embodiment of the present application cancels radial diffusion and adopts an axial diffuser 12. The chaotic airflow coming out of the fan blades 11 passes through the annular gridless channel 16 and directly enters the axial diffuser 12. After being guided by the diffuser blades 124 of the axial diffuser 12, the flow tends to be stable, reducing the generation of vortices in the flow channel. The radial diffusion is cancelled. It can effectively reduce wind resistance, reduce energy loss, and improve the working efficiency of the fan. Increasing the "dynamic and static gap" weakens the "dynamic and static interference" effect when the vacuum cleaner cleaning device is working and reduces the generation of fan noise. The radial diffuser 12 is generally arranged at the position of the annular gridless channel 16, often very close to the blades. After the air comes out of the fan blades 11, it directly hits the leading edge of the radial diffuser blades 124, resulting in strong "dynamic and static interference". A large number of documents prove that the "dynamic-static interference" generated by the rotor 14 and the motor stator 21 blades is an important component of the fan noise. The fan of the vacuum cleaner cleaning device of the embodiment of the present application eliminates the radial diffuser 12 and adopts an axial diffuser 12 to increase the "dynamic-static gap", which is a very powerful means to improve the fan noise. Since the radial diffuser 12 is eliminated, the diameter of the fan can be reduced accordingly. It avoids the problems of reduced bearing 15 life and increased fan noise caused by the increase in power due to the increase in fan diameter.

[0050] Optionally, the first positioning mechanism 121 is formed by a portion of the diffuser blades 124 of the axial diffuser 12 extending along the axial direction of the axial diffuser 12 .

[0051] Optionally, the stator module 2 includes: a motor stator 21 , which is provided with a second positioning mechanism 211 adapted to the first positioning mechanism 121 .

[0052] Optionally, the motor stator 21 includes: a stator outer ring 213 in a circular ring shape, with a plurality of stator teeth 214 evenly distributed and circumferentially connected to the inner side thereof; the stator teeth 214 are arranged along the radial direction of the stator outer ring 213; winding group coils 215, the number of which corresponds to that of the stator teeth 214, and each stator tooth 214 is sleeved with a winding group coil 215; wherein, a second positioning mechanism 211 adapted to the first positioning mechanism 121 is provided on the yoke portion of the stator outer ring 213.

[0053] Optionally, the second positioning mechanism 211 is formed by inward depression of the yoke portion of the stator outer ring 213.

[0054] Optionally, the first positioning mechanism and the second positioning mechanism 211 can be positioning parts and fastening parts forming a snap structure, can be bolts and threaded holes forming a screw connection, or can be positioning posts and positioning holes in the above embodiments.

[0055] Optionally, one of the axial diffuser 12 and the motor stator 21 includes a plurality of positioning posts, and the other of the axial diffuser 12 and the motor stator 21 includes a plurality of positioning holes adapted to the positioning posts. By respectively and correspondingly providing the positioning posts and the positioning holes on the axial diffuser 12 and the motor stator 21, the connection and fixation of the axial diffuser 12 and the motor stator 21 are facilitated. The positioning posts can be provided on any one of the axial diffuser 12 and the motor stator 21, while the positioning holes are provided on the other one. For example, the positioning posts can be provided on the axial diffuser 12, while the positioning holes are provided on the motor stator 21.

[0056] Optionally, the positioning posts extend along the axis of the axial diffuser 12. In an exemplary embodiment, some of the diffuser vanes 124 in the axial diffuser 12 extend along the axis of the axial diffuser 12 to form the positioning posts, and the motor stator 21 includes positioning holes. The number of the positioning posts is different from the number of the diffuser vanes 124. Generally, the number of the positioning posts may be less than the number of the diffuser vanes 124. Therefore, when the positioning posts are arranged on the axial diffuser 12, some of the diffuser vanes 124 may extend along the axis to form the positioning posts. For example, 3 out of 12 diffuser vanes 124 extend along the axis to form the positioning posts. In the embodiment of the present application, the diffuser vanes 124 extend along the axis of the axial diffuser 12 to form the positioning posts, which can make the positioning posts have sufficient strength, and will not affect the structure of the axial diffuser 12, and at the same time can reduce the material consumption. It is avoided that in order to improve the strength of the positioning posts, it is necessary to increase the thickness of the part where the positioning posts are located, etc. In an exemplary embodiment, the end of the diffuser vane 124 may extend integrally along the axis of the axial diffuser 12 to form the positioning post. It is also possible that a partial body of the end of the diffuser vane 124 extends along the axis of the axial diffuser 12 to form the positioning post. When a partial body of the end of the diffuser vane 124 extends along the axis of the axial diffuser 12 to form the positioning post, for example, the side of the diffuser vane 124 close to the main body 123 may extend along the axis of the axial diffuser 12 to form the positioning post.

[0057] Optionally, the positioning posts may be formed on the main body 123. In an exemplary embodiment, the positioning posts may be located at positions on the main body 123 corresponding to the diffuser vanes 124.

[0058] Optionally, a positioning post may be partially formed on the main body 123 and partially extended from the diffuser vane 124.

[0059] In the above embodiments, the positioning holes may be hole grooves or open grooves. In some embodiments, the outer peripheral surface of the motor stator 21 is recessed to form the positioning holes. The outer peripheral surface of the positioning hole is recessed to form an open groove, which can save materials while ensuring strength in addition to ensuring stable positioning. The wall surface of the positioning hole is a cylindrical surface, and the positioning post has a cylindrical surface adapted to the wall surface of the positioning hole. The wall surface of the positioning hole and the corresponding mating surface of the positioning post are cylindrical surfaces, effectively ensuring the stability of the combination of the two.

[0060] Optionally, the positioning post is a semi-cylindrical body. One side of the positioning post has a cylindrical surface adapted to the wall surface of the positioning hole, and the other side matches the circumferential surface of the motor stator 21. In the embodiments of the present application, the positioning hole can be provided at any position on the circumferential surface of the motor stator 21. In some embodiments, the positioning hole is located on the outer circumferential surface corresponding to the tooth center line of the motor stator 21. The positioning hole is provided on the outer circumferential surface opposite to the teeth of the motor stator 21. There is enough space at this part to set the positioning hole and ensure the strength, without the need to additionally increase the thickness and other dimensions of the part where the positioning hole is located, thus increasing the material consumption. In the embodiments of the present application, the number of the positioning holes and the positioning posts is not specifically limited. For example, it can be 2, 3, 4, etc. In some embodiments, the number of the positioning holes and the positioning posts is three respectively, and the positioning holes and the positioning posts are evenly distributed on their respective circumferences. When the number of the positioning holes and the positioning posts is three respectively, the positioning connection between the axial diffuser 12 and the motor stator 21 can be ensured. A plurality of positioning holes are distributed on a circumference. A plurality of positioning posts are also evenly distributed on a circumference. The diameters of the circumferences where they are located are equal. Since the positioning holes and the positioning posts are evenly distributed on their respective circumferences, when the axial diffuser 12 and the motor stator 21 are connected, there is no need to limit their specific orientations. Any positioning post can be adapted to any positioning hole. In the embodiments of the present application, the fixed connection manner between the axial diffuser 12 and the motor stator 21 is not limited. For example, the axial diffuser 12 and the motor stator 21 can be bonded by glue, or connected by interference fit, or connected by threaded parts, etc.

[0061] Optionally, one of the axial diffuser 12 and the motor stator 21 includes a plurality of connecting posts 212, and the other of the axial diffuser 12 and the motor stator 21 includes a plurality of connecting holes 127 adapted to the connecting posts 212. The axial diffuser 12 and the motor stator 21 are connected together by the cooperation of the connecting posts 212 and the connecting holes 127. For example, the connecting posts 212 and the hole walls of the connecting holes 127 are fixedly connected by glue. In this way, glue can be applied at specific positions to avoid defects such as glue overflow. Or the connecting posts 212 and the connecting holes 127 are fixedly connected by interference fit. In an exemplary embodiment, the axial diffuser 12 includes a plurality of connecting holes 127, and the motor stator 21 includes a plurality of connecting posts 212 adapted to the connecting holes 127. For example, a plurality of connecting holes 127 can be provided on the main body portion 123. In the fan of the embodiments of the present application, the corresponding connecting posts 212 and connecting holes 127, as well as the corresponding positioning posts and positioning holes, can be included at the same time.

[0062] Optionally, the axis of the circle where the corresponding connecting posts 212 and connecting holes 127 are located is collinear with the axis of the circle where the corresponding positioning posts and positioning holes are located. In an exemplary embodiment, the radius of the circle where the corresponding connecting posts 212 and connecting holes 127 are located can be smaller than the radius of the circle where the corresponding positioning posts and positioning holes are located.

[0063] Optionally, the length of the connecting post 212 is less than that of the positioning post. During assembly, the positioning of the axial diffuser 12 and the motor stator 21 can be achieved through the cooperation of the positioning post and the positioning hole, so that the connecting post 212 corresponds to the connecting hole 127, facilitating assembly.

[0064] Optionally, one of the axial diffuser 12 and the motor stator 21 includes a plurality of positioning posts, and the other of the axial diffuser 12 and the motor stator 21 includes a plurality of positioning holes adapted to the positioning posts. By respectively providing positioning posts and positioning holes on the axial diffuser 12 and the motor stator 21, the connection and fixation of the axial diffuser 12 and the motor stator 21 are facilitated. The positioning posts can be provided on any one of the axial diffuser 12 and the motor stator 21, and the positioning holes are provided on the other. For example, the positioning posts can be provided on the axial diffuser 12, and the positioning holes are provided on the motor stator 21.

[0065] Optionally, the positioning posts extend along the axial direction of the axial diffuser 12. In an exemplary embodiment, some of the diffuser vanes 124 of the axial diffuser 12 extend along the axial direction of the axial diffuser 12 to form positioning posts, and the motor stator 21 includes positioning holes. The number of positioning posts is different from the number of diffuser vanes 124. Generally, the number of positioning posts can be less than the number of diffuser vanes 124. Therefore, when the positioning posts are provided on the axial diffuser 12, some of the diffuser vanes 124 can extend along the axial direction to form positioning posts. For example, 3 out of 12 diffuser vanes 124 extend along the axial direction to form positioning posts. In the embodiment of the present application, the diffuser vanes 124 extend along the axial direction of the axial diffuser 12 to form positioning posts, which can make the positioning posts have sufficient strength, and will not affect the structure of the axial diffuser 12, and at the same time can reduce the consumption of materials. It is avoided that in order to improve the strength of the positioning posts, it is necessary to increase the thickness of the part where the positioning posts are located, etc. In an exemplary embodiment, the end of the diffuser vane 124 can extend integrally along the axial direction of the axial diffuser 12 to form a positioning post. It can also be that a partial body of the end of the diffuser vane 124 extends along the axial direction of the axial diffuser 12 to form a positioning post. When a partial body of the end of the diffuser vane 124 extends along the axial direction of the axial diffuser 12 to form a positioning post, for example, the side of the diffuser vane 124 close to the main body 123 can extend along the axial direction of the axial diffuser 12 to form a positioning post.

[0066] Optionally, the positioning posts can be formed on the main body 123. In an exemplary embodiment, the positioning posts can be located at positions on the main body 123 corresponding to the diffuser vanes 124.

[0067] Optionally, a positioning post may be partially formed on the main body portion 123 and partially extended from the diffuser vane 124. In the embodiments of the present application, the positioning hole may be a hole groove or an open groove. In some embodiments, a positioning hole is formed by concave inward on the outer peripheral surface of the motor stator 21. The outer peripheral surface of the positioning hole is concave inward to form an open groove, which can save materials while ensuring strength in addition to ensuring stable positioning. The wall surface of the positioning hole is a cylindrical surface, and the positioning post has a cylindrical surface adapted to the wall surface of the positioning hole. The wall surface of the positioning hole and the corresponding mating surface of the positioning post are cylindrical surfaces, effectively ensuring the stability of the combination of the two.

[0068] Optionally, the axes of the circles where the corresponding connecting posts 212 and the connecting holes 127 are located are collinear with the axis of the circle where the corresponding positioning posts and positioning holes are located. In an exemplary embodiment, the radius of the circle where the corresponding connecting posts 212 and the connecting holes 127 are located may be smaller than the radius of the circle where the corresponding positioning posts and positioning holes are located.

[0069] Optionally, the length of the connecting post 212 is less than the length of the positioning post. During assembly, the positioning of the axial diffuser 12 and the motor stator 21 can be achieved through the cooperation of the positioning post and the positioning hole, so that the connecting post 212 corresponds to the connecting hole 127, facilitating assembly.

[0070] As Figures 8 - 11 shown, in an alternative embodiment of the present invention, the stator teeth 214 are arranged radially along the stator outer ring 213; a winding group coil 215 is sleeved outside each stator tooth 214; the winding group coil 215 has only two ends, and the two ends of the winding group coil 215 are respectively connected to the positive and negative electrodes of the power supply. In other words, in this embodiment, the span of the winding group coil 215 is 1, where the winding group coil 215 adopts a span of 1 tooth, which can improve production efficiency. The coil is bundled on one tooth, which can simultaneously improve the stiffness of the coil and the iron core and reduce noise.

[0071] Optionally, one end of the stator tooth 214 away from the stator outer ring 213 is recessed inward to form an arc-shaped structure. And the arc-shaped structures of two adjacent stator teeth 214 are not connected, so that the stator slots 216 are formed between two adjacent stator teeth 214 and the stator outer ring 213, and the arc-shaped structures of two adjacent stator teeth 214 are separated by a predetermined distance in the circumferential direction, and the space between the two arc-shaped structures in the circumferential direction is the slot opening of the stator slot 216.

[0072] It can be understood that in some existing technologies, for coils with a span greater than 1, when assembling the stator, it is necessary to first prepare the winding group coil 215 according to a predetermined number of turns, and then embed the winding group coil 215 into the stator slot 216, rather than directly sleeving the coil on the stator tooth 214. For example, for a coil with a span of 2, the first coil 2151 has only one end connected to the positive electrode, and the fourth coil also has only one end connected to the negative electrode. After assembling the coils, it is also necessary to connect the positive electrode of the first coil to the fourth coil across two coils, which will result in a relatively long ineffective copper wire, leading to waste of copper wire, large resistance, high copper loss, and relatively low efficiency.

[0073] After a large amount of research, the inventor determined that for the winding group coil 215 with a span of 1, although the winding coefficient is low, that is, this kind of coil outputs a smaller torque under the same current, but due to the span of 1, that is, the winding group coil 215 has two ends respectively connected to the positive electrode and the negative electrode, it can make the ineffective copper wire at the ends of the winding group coil 215 short, with small copper loss of the copper wire and high efficiency. Although the winding coefficient of the coil with a span greater than 1 is high, but because it is necessary to connect the coils across the stator tooth 214, it will lead to a long ineffective copper wire at the ends, large resistance, and high copper loss. And because of its high copper loss, the rotation efficiency of the stator is not much different from the efficiency of the coil with a span of 1 of the present invention. However, the coil of the present invention has a span of 1, which reduces the use of connecting wires, can make the copper consumption less, and can also be bundled on the stator tooth 214 to improve the stiffness of the stator tooth 214, thus improving both the production efficiency and the use efficiency of the stator.

[0074] It should be noted that in the present invention, an even number of stator teeth 214 are evenly distributed and connected to the outer stator ring 213, and the number of stator slots 216 of the present invention is the same as the number of stator teeth 214, which is also an even number. That is, the number of stator slots 216 of the present invention is also an even number, which can reduce the unbalanced radial magnetic pull during the rotation of the stator, reduce electromagnetic vibration, and reduce the noise of the motor during use. The outer stator ring 213 is formed by enclosing a plurality of annular sector-shaped stator units 2131 connected in a chain; each stator unit 2131 is connected to a stator tooth 214. In this embodiment, the stator unit 2131 is made of high-frequency silicon steel material. By setting the outer stator ring 213 to be formed by enclosing a plurality of annular sector-shaped stator units 2131 connected in a chain, when processing the outer stator ring 213, two chain-connected outer stator rings 213 can be arranged in a crosswise manner, that is, the stator teeth 214 of the second outer stator ring 213 are arranged between two stator teeth 214 of the first outer stator ring 213, so that two outer stator rings 213 can be produced by one stamping of the mold, and the two outer stator rings 213 are arranged in a staggered manner. Compared with producing one outer stator ring 213 by one stamping, a large amount of silicon steel sheets can be saved. In addition, since the outer stator ring 213 is chain-connected in this embodiment, wires can be directly wound on each stator tooth 214, so that all stator teeth 214 are wound simultaneously, which improves the production efficiency, avoids the installation process of embedding the coil in the stator slot 216, improves the production efficiency of the stator, and moreover, the outer stator ring 213 provided by the embodiment of the present invention can also make the coil neatly and tightly wrapped on the stator teeth 214, improve the stiffness of the stator teeth 214, and play a role in protecting the stator teeth 214, and the tight coil can also reduce... In addition, it is worth mentioning that in the prior art, the winding group coil 215 is embedded into the stator slot 216, and then the position of the winding group in the stator slot 216 is fixed. In order to improve the slot fill factor of the stator slot 216, only more windings can be set, and in the present invention, compared with filling the coil in the stator slot 216, by directly winding the wire on the stator teeth 214, a tight winding group is obtained, and while obtaining the same slot fill factor, less copper wire can be used.

[0075] Optionally, after the winding of the stator teeth 214 is completed, the first stator unit 2131 and the last stator unit 2131 are connected, and the connecting lines of all adjacent stator units 2131 are welded by laser.

[0076] Optionally, the circle formed by the arc-shaped structure of the stator teeth 214 is used to accommodate the rotor 14 with two poles.

[0077] Among them, the number of stator teeth 214 is 6, the number of stator slots 216 is also 6, and the number of phases of the stator is 3.

[0078] Optionally, when the number of stator teeth 214 is 6 and the number of phases of the stator is 3, the included angle between two coils belonging to the same phase is 180°.

[0079] Optionally, the above six winding group coils 215 are wound in a "Y" connection or a delta connection.

[0080] In this embodiment, the number of parallel branches in the winding group coils 215 belonging to the same phase is 1, that is, the head end of the first winding group coil 215 in the same phase is connected to the tail end of the second winding group coil 215 in the same phase, so as to form a branch, that is, the winding group coils 215 in the same phase are connected in series. The six stator coils respectively include: a first coil 2151, a second coil 2152, a third coil 2153, a fourth coil 2154, a fifth coil 2155, and a sixth coil 2156 along the circumferential clockwise or counterclockwise direction of the stator outer ring 213.

[0081] Among them, the first coil 2151 and the fourth coil 2154 are set as phase A, the second coil 2152 and the fifth coil 2155 are set as phase B, and the third coil 2153 and the sixth coil 2156 are set as phase C. The included angle between two coils belonging to the same phase is 180°, and two coils belonging to the same phase are connected in series with each other to form a branch.

[0082] The number of parallel branches in the winding group coils 215 belonging to the same phase is 2, that is, the head end of the first winding group coil 215 in the same phase is connected to the head end of the second winding group coil 215 in the same phase, and the tail end of the first winding group coil 215 in the same phase is connected to the tail end of the second winding group coil 215 in the same phase, so as to form two branches, that is, the winding group coils 215 in the same phase are connected in parallel.

[0083] The six stator coils respectively include: a first coil 2151, a second coil 2152, a third coil 2153, a fourth coil 2154, a fifth coil 2155, and a sixth coil 2156 along the circumferential clockwise or counterclockwise direction of the stator outer ring 213. Among them, the first coil 2151 and the fourth coil 2154 are set as phase A, the second coil 2152 and the fifth coil 2155 are set as phase B, and the third coil 2153 and the sixth coil 2156 are set as phase C. Two coils belonging to the same phase are connected in parallel to obtain two branches.

[0084] The yoke of the stator is provided with a semi-circular hole for positioning the axial diffuser 12 of the fan; the center of the semi-circular hole is arranged on the center line of the stator teeth 214.

[0085] Optionally, the stator module 2 further includes: a PCB circuit board 22 detachably connected to the motor stator 21; both ends of each winding group coil 215 extend axially along the motor stator 21 to the side connected to the PCB circuit board 22; the PCB circuit board 22 is provided with a connection circuit for the winding group coils 215 of the same phase, and the winding group coils 215 belonging to the same phase are connected through the PCB circuit board 22. Specifically, the winding group coils 215 belonging to the same phase are connected through the connection circuit of the winding group coils 215 of the same phase on the PCB circuit board 22. This can make the coils arranged neatly and reduce the volume of the fan.

[0086] On another aspect of the embodiments of the present invention, a cleaning device provided with the fan described in any one of the above embodiments is further provided.

[0087] The cleaning device of the embodiments of the present application includes a sweeping robot, a handheld vacuum cleaner, etc.

[0088] The present invention aims to protect a fan, including: a fluid module 1 for generating an air flow and guiding the air flow, the fluid module 1 includes a diffuser 12, and the diffuser 12 has a first positioning mechanism 121; a stator module 2 detachably connected to the diffuser 12, and the stator module 2 is provided with a second positioning mechanism 211 adapted to the first positioning mechanism 121. This fan adopts a modular structure, is simple to assemble and suitable for mechanized production.

[0089] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modification examples falling within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.

Claims

1. A fan, characterized in that, Comprising: A fluid module (1) for generating and guiding an air flow, the fluid module (1) including fan blades (11), a diffuser (12), and an air mask (13), the diffuser (12) having a first positioning mechanism (121); A stator module (2) detachably connected to the diffuser (12), the stator module (2) being provided with a second positioning mechanism (211) adapted to the first positioning mechanism (121); The diffuser (12) is an axial diffuser (12), and the axial diffuser (12) further includes: an outer cylinder (122), a main body portion (123) disposed within the outer cylinder (122), and a plurality of diffuser vanes (124); The first positioning mechanism (121) is formed by partial ones of the diffuser vanes (124) of the axial diffuser (12) extending along the axial direction of the axial diffuser (12).

2. The fan according to claim 1, characterized in that, The fluid module (1) further includes: a optical axis (18) and a rotor (14) sleeved on the optical axis (18); The rotor (14) rotates under the drive of the stator module (2), correspondingly driving the fan blades (11) to rotate, thereby generating an air flow.

3. The fan according to claim 2, characterized in that, The plurality of diffuser vanes (124) connect the outer cylinder (122) and the main body portion (123), and the plurality of diffuser vanes (124) divide the annular space between the outer cylinder (122) and the main body portion (123) into a plurality of diffusing air ducts (125). The main body portion (123) has a central shaft hole (126), and the main body portion (123) is sleeved on the optical axis (18) through the central shaft hole (126).

4. The fan according to claim 3, characterized in that, The outer diameter of the main body portion (123) of the axial diffuser (12) is equal to the outer diameter of the stator module (2), so that the air flowing out of the diffusing air ducts (125) flows through the outside of the motor stator (21).

5. The fan according to any one of claims 1 - 4, characterized in that, The stator module (2) includes: A motor stator (21) provided with a second positioning mechanism (211) adapted to the first positioning mechanism (121).

6. The fan according to claim 5, characterized in that, The motor stator (21) includes: An annular stator outer ring (213) having a plurality of stator teeth (214) evenly distributed and circumferentially connected to the inner side thereof; the stator teeth (214) are arranged along the radial direction of the stator outer ring (213); A winding group coil (215) corresponding in number to the stator teeth (214), and each stator tooth (214) is sleeved with a winding group coil (215); Wherein, the yoke portion of the stator outer ring (213) is provided with a second positioning mechanism (211) adapted to the first positioning mechanism (121).

7. The fan according to claim 6, characterized in that, The second positioning mechanism (211) is formed by the inward depression of the yoke portion of the stator outer ring (213).

8. The fan according to claim 6, characterized in that, The second positioning mechanism (211) is a positioning groove, the wall surface of the positioning groove is a cylindrical surface, the first positioning mechanism (121) is a semi-cylinder, and a cylindrical surface adapted to the wall surface of the positioning groove is provided on the side of the first positioning mechanism (121) close to the positioning groove.

9. The fan according to claim 6, characterized in that, The stator module (2) further includes: A printed circuit board (22) is detachably connected to the motor stator (21); Both ends of each winding group coil (215) extend along the axial direction of the motor stator (21) to the side connected to the printed circuit board (22); The printed circuit board (22) is provided with a connection circuit for the winding group coils (215) of the same phase, and the winding group coils (215) belonging to the same phase are connected through the printed circuit board (22).

10. A cleaning device, characterized in that, A blower as claimed in any one of claims 1-9 is provided.

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