Fan assembly and air handling device

Abstract

A fan assembly comprises a motor (20) and an impeller (10), the motor (20) being connected to the impeller (10). The impeller (10) comprises: a first end plate (11), a second end plate (12), and a plurality of blades (13) distributed at intervals in a circumferential direction of the impeller (10). The second end plate (12) is provided with an air inlet (101), and the second end plate (12) and the first end plate (11) are spaced apart in an air feeding direction of the impeller (10). The blades (13) are connected to the first end plate (11) and the second end plate (12), the first end plate (11) comprising a first plate portion (111) and a second plate portion (112) annularly provided on the periphery of the first plate portion (111), and the second plate portion (112) obliquely extending in the air feeding direction towards a direction away from the axis of the impeller (10). Further comprised is an air handling device.

Description

Fan Assemblies and Air Handling Units

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on February 23, 2024, with application number 202410204378.7 and invention name “Fan assembly and air treatment device”, the entire contents of which are incorporated by reference into this application.

[0003] This application claims priority to the Chinese patent application filed with the China Patent Office on February 23, 2024, with application number 202420348104.0 and invention name “Fan assembly and air treatment device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0004] The present application relates to the technical field of air treatment, and in particular to a fan assembly and an air treatment device. Background Art

[0005] The impeller used in a centrifugal fan usually includes two end plates arranged opposite to each other and a plurality of blades arranged between the two end plates. The end plates are usually arranged in a flat plate structure, which leads to large flow loss and turning loss when the airflow enters the impeller, thereby resulting in low efficiency of the centrifugal fan. Summary of the Invention

[0006] One object of the present application is to provide a fan assembly.

[0007] Another object of the present application is to provide an air treatment device.

[0008] According to an embodiment of the present application, a fan assembly includes a motor and an impeller, the motor is connected to the impeller, and the impeller includes: a first end plate, a second end plate and a plurality of blades spaced apart along the circumference of the impeller, the second end plate is provided with an air inlet, and the second end plate and the first end plate are spaced apart along the air inlet direction of the impeller; the blades connect the first end plate and the second end plate, the first end plate includes a first plate portion and a second plate portion arranged around the periphery of the first plate portion, wherein the second plate portion extends obliquely in the direction away from the axis of the impeller in the air inlet direction; or, the radial dimension of the rotating structure enclosed by the inner edges and / or outer peripheries of the plurality of blades changes along the axis of the impeller; or, the outer diameter of the first end plate is smaller than the outer diameter of the second end plate.

[0009] In addition, the fan assembly according to the above embodiment of the present application may also have the following additional technical features:

[0010] In some embodiments, the second plate portion extends obliquely in the air intake direction in a direction away from the axis of the impeller, and a cross section of the second plate portion passing through the impeller axis is non-linear.

[0011] In some embodiments, the cross section is divided into at least two segments in the radial direction, and the at least two segments include a first segment close to the impeller axis and a second segment away from the impeller axis, and the angle a1 between the first segment and the impeller axis is greater than the angle a2 between the second segment and the impeller axis.

[0012] In some embodiments, at least one of the at least two segments has an angle with the impeller axis that gradually decreases in a direction away from the impeller axis; or, at least one of the at least two segments has an angle with the impeller axis that remains unchanged in a direction away from the impeller axis; or, at least one of the at least two segments is in a straight line shape; or, at least one of the at least two segments is in a smooth arc shape, and the angle with the impeller axis that gradually decreases in a direction away from the impeller axis; or, two adjacent segments of the at least two segments transition smoothly; or, the at least two segments transition smoothly with the first plate portion.

[0013] In some embodiments, in the direction away from the impeller axis, the angle a between the cross section and the impeller axis gradually decreases; or, the cross section is a smooth curve; or, the angle a between the second plate portion and the impeller axis is configured to be 30°≤a≤90°; or, the radial span L of the second plate portion and the second end plate outer diameter D1 satisfy 10%≤L / D1≤25%; or, the radial span L of the second plate portion and the second end plate outer diameter D1 satisfy 14%≤L / D1≤18%; or, the first end plate outer diameter D2 and the second end plate outer diameter D1 satisfy 50%≤D2 / D1≤100%; or, the first end plate outer diameter D2 and the second end plate outer diameter D1 satisfy 60%≤D2 / D1≤70%.

[0014] In some embodiments, the impeller is a mixed flow impeller.

[0015] According to an embodiment of the present application, the fan assembly includes a motor and the aforementioned impeller, wherein the motor is connected to the first end plate of the impeller.

[0016] In some embodiments, the motor includes a stator assembly and a rotor assembly, the rotor assembly is rotatably mounted on the stator assembly, and the rotor assembly includes a rotor housing, which is inserted into the impeller along the axis of the impeller.

[0017] In some embodiments, the axial depth H1 of the rotor housing inserted into the impeller satisfies H1 / H0≤H2 / H0*6%*(D2 / D1) ^2, H0 is the axial dimension of the rotor housing, H2 is the axial distance between the air inlet and the first end plate, D1 is the radial dimension of the rotor housing, and D2 is the average value of the sum of the radial dimension of the air inlet and the radial dimension of the first plate portion.

[0018] In some embodiments, the axial depth H1 of the rotor housing inserted into the impeller satisfies H1 / H0≤H2 / H0*4.5%*(D2 / D1) ^ 2.

[0019] In some embodiments, the fan assembly further includes a first bearing and a second bearing, the rotor assembly includes a rotor shaft, the rotor shaft is passed through the first bearing and the second bearing, the first bearing is closer to the air inlet relative to the second bearing, and satisfies H3 / H0≤H1 / H0, where H3 is the axial distance between the first bearing and the end face of the rotor housing.

[0020] In some embodiments, 1.2*H3 / H0≤H1 / H0 is satisfied; or, the impeller and the rotor assembly constitute a rotating component, the center of gravity of the rotating component is located between the rotor housing and the air inlet, and the axial distance between the center of gravity of the rotating component and the first bearing is 0 to 40 mm.

[0021] In some embodiments, a lug is provided on the circumferential surface of the rotor housing, and the lug abuts against and is connected to the first plate portion.

[0022] In some embodiments, the fan assembly further includes a guide fence, which is opposite to the impeller along the axis of the impeller, and includes a plurality of ring fences and a plurality of first straightening bars, the plurality of ring fences and the plurality of first straightening bars are connected into a grid shape, and the plurality of first straightening bars are distributed around the center of the guide fence and are uniformly distributed or non-uniformly distributed along the circumference of the guide fence.

[0023] In some embodiments, the guide fence has a first guide portion and a second guide portion, the turbulence or flow rate of the airflow leading to the first guide portion is higher than that of the second guide portion, and the distribution density of the first straightening strips of the first guide portion is higher than the distribution density of the first straightening strips of the second guide portion.

[0024] In some embodiments, within the same angular range along the circumference of the guide grid, a ratio of the number N1 of the first straightening strips in the first guide portion to the number N2 of the first straightening strips in the second guide portion satisfies: 1.1≤N1 / N2≤40.

[0025] In some embodiments, the guide fence has a first guide portion and a second guide portion along the circumferential direction, and the distribution density of the first straightening strips in the first guide portion and the second guide portion is different, wherein the first guide portion is provided with the second guide portion on both sides of the circumference of the guide fence; or, the first guide portion and the second guide portion are alternately distributed in the circumferential direction of the guide fence; or, the first guide portion is configured as a fan-shaped with an angular arc α greater than 0° and not greater than 120°; or, the first guide portion is configured as a fan-shaped with an angular arc α not less than 30° and not greater than 90°; or, the second guide portion is configured as a fan-shaped with an angular arc β greater than 0° and not greater than 120°; or, the second guide portion is configured as a fan-shaped with an angular arc β not less than 30° and not greater than 90°.

[0026] In some embodiments, the plurality of ring gates include a first ring gate located at the innermost side, and a second rectifying bar is provided on the inner side of the first ring gate.

[0027] The second rectifying bars on the inner side of the first ring gate are concave in the axial direction; or the first rectifying bars on the outer side of the first ring gate are convex in the axial direction; or the number of the second rectifying bars on the inner side of the first ring gate is not greater than the number of the first rectifying bars on the outer side of the first ring gate.

[0028] In some embodiments, the guide fence has a first guide portion and a second guide portion, and the fan assembly satisfies the heat exchanger arranged relatively along the axial direction of the guide fence, wherein the distance between the first guide portion and the heat exchanger is greater than the distance between the second guide portion and the heat exchanger, and the distribution density of the first straightening strips of the first guide portion is higher than the distribution density of the first straightening strips of the second guide portion.

[0029] In some embodiments, the motor includes a stator assembly and a rotor assembly, the stator assembly includes a bearing seat and an iron core assembly, the iron core assembly is installed on the bearing seat, and the bearing seat has a plurality of wire holes.

[0030] In some embodiments, the bearing seat includes: a plate portion, the plate portion having a first side surface and a second side surface relative to each other, and a mounting opening and a plurality of wire holes passing through the first side surface and the second side surface; a sleeve portion, the sleeve portion being connected to the plate portion, opposite to the mounting opening and extending along the axis of the mounting opening; wherein, the first side surface and / or the second side surface is provided with reinforcing ribs, and the reinforcing ribs are arranged around the mounting opening.

[0031] In some embodiments, the wire passing holes include a plurality of wire passing holes, and the plurality of wire passing holes surround the mounting opening. The reinforcing ribs include a plurality of first radial ribs extending radially along the mounting opening, and the first radial ribs are arranged on the first side surface. The plurality of wire passing holes are separated by the first radial ribs.

[0032] In some embodiments, the reinforcing ribs include a plurality of first annular ribs provided on the first side surface and surrounding the mounting opening, and the first annular ribs are provided with a plurality of positioning holes.

[0033] In some embodiments, the plurality of first annular ribs include a first convex rib, which is arranged on the outer periphery of the plate portion, wherein the first convex rib is provided with a plurality of first positioning holes; or, the first convex rib is provided with a first positioning protrusion that protrudes out of the first convex rib along the normal direction of the plate portion.

[0034] In some embodiments, the plurality of first annular ribs further include second ribs, which are arranged radially inward of the first ribs, wherein the second ribs are provided with a plurality of second positioning holes; or, the outer ring of the second ribs is provided with a plurality of second positioning protrusions.

[0035] In some embodiments, the plurality of first annular ribs further include a third rib, which is arranged radially inward of the second rib, wherein an annular groove is provided on the inner circumference of the third rib, and the third rib is not closed and forms a second notch.

[0036] In some embodiments, the plurality of first annular ribs further include a fourth rib extending along the periphery of the mounting opening; wherein the fourth rib is provided with a plurality of bosses, and at least one of the bosses is provided with a third positioning hole.

[0037] In some embodiments, the first side surface of the plate portion is further provided with a plurality of first radial ribs extending radially along the mounting opening, the first radial ribs being connected to the boss of the fourth convex rib and connecting at least a portion of the plurality of first annular ribs.

[0038] In some embodiments, the reinforcing ribs further include a plurality of second annular ribs disposed on the second side surface and surrounding the mounting opening.

[0039] In some embodiments, the plurality of second annular ribs include a fifth rib, and the plurality of wire holes are located on the inner side of the fifth rib and adjacent to the fifth rib; the plurality of second annular ribs also include a sixth rib, and the sixth rib is arranged radially outside the fifth rib; or, the reinforcing ribs also include a plurality of second radial ribs extending radially along the mounting opening, and the second radial ribs are arranged on the second side surface, and are respectively connected to the plurality of second annular ribs and at least two of the sleeve portions.

[0040] In some embodiments, the stator assembly further includes: a power cord assembly, wherein the power cord assembly and the iron core assembly are disposed on opposite sides of the plate portion, and the lead wire structure of the iron core assembly passes through the wire hole and is electrically connected to the power cord assembly.

[0041] In some embodiments, the stator assembly further includes a cover, which covers the bearing seat, the power cord assembly includes a circuit board, the circuit board is disposed in the cover, and a wiring harness of the power cord assembly extends from the cover.

[0042] In some embodiments, the first side surface of the plate portion is provided with a third rib, and the third rib is assembled with the periphery of the opening of the cover shell.

[0043] In some embodiments, an annular groove is provided on the inner circumference of the third rib, and a clip is provided on the outer circumference of the cover shell, and the clip is snap-connected to the annular groove; and / or, the plurality of wire holes are provided on the plate portion and located on the inner side of the third rib; and / or, the core assembly is interference fit with the sleeve portion; and / or, the first side surface of the plate portion is provided with a radial rib, the peripheral wall of the cover shell has a first notch, and the radial rib is passed through the first notch.

[0044] In some embodiments, the third rib is not closed to form a second gap for leading out the wiring harness of the power cord assembly; or, the peripheral wall of the cover shell has a third gap for leading out the wiring harness of the power cord assembly; or, the third rib is not closed to form a second gap, the peripheral wall of the cover shell has a third gap, and the cover shell has positioning ribs on opposite sides of the third gap along the circumferential direction, and the positioning ribs are arranged on the inner side of the second gap.

[0045] In some embodiments, the core assembly has a pin, which passes through the wire hole and is electrically connected to the power cord assembly. The stator assembly also includes a pin fixing plate, at least a portion of which is passed through the wire hole, and the pin is passed through the pin fixing plate and is electrically connected to the power cord assembly.

[0046] In some embodiments, the fan assembly further includes a mounting bracket, which includes: a first mounting plate; a second mounting plate, which is arranged alternately with the first mounting plate, and the second mounting plate is connected to the motor; a stacked plate, which is stacked and connected to the first mounting plate, and the stacked plate has a socket and a flange surrounding the socket; and a support leg, which is connected to the second mounting plate, and the end of the support leg is inserted into the socket to connect to the flange.

[0047] In some embodiments, the end of the support leg is welded to the flange; and / or the periphery of the stacked plate has a third folded edge; and / or the end of the support leg is in abutment with the first mounting plate.

[0048] In some embodiments, the mounting bracket includes a first screw, and the stacked plates and the first mounting plate are adapted to be fastened by passing the first screw through the first screw; the first screws are respectively provided on opposite sides of the insertion hole.

[0049] In some embodiments, the stacking plates include a plurality of stacking plates, which are alternately arranged along the circumference of the first mounting plate, and the minimum distance between the stacking plates and the edge of the first mounting plate is no greater than 5 mm.

[0050] In some embodiments, the first mounting plate includes a first panel and a first folded edge provided around the first panel, the stacked plate is laminated and connected to the first panel, and the first folded edge is suitable for connecting to the target area to fix the mounting bracket.

[0051] In some embodiments, the first folded edge has a connecting hole, and the first folded edge is suitable for connecting to the target area through the connecting hole; and / or, the first folded edge is provided with a rib portion.

[0052] In some embodiments, the first folded edges on opposite sides of the first panel along the first direction are provided with connecting holes, and the first folded edges on opposite sides of the first panel along the second direction are not provided with the connecting holes. The first direction and the second direction are perpendicular to each other, and the first folded edges are suitable for connecting to the target area through the connecting holes.

[0053] In some embodiments, a guide ring, an electric control component, a guide grid and a mounting bracket are further included, wherein the impeller is connected to the motor via a flange, the motor is connected to the electric control component via the bearing seat, the electric control component is connected to the mounting bracket, and the guide ring and the guide grid are mounted on the mounting bracket.

[0054] An air treatment device according to an embodiment of the present application includes a cabinet and the aforementioned fan assembly, wherein the fan assembly is disposed in the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a schematic diagram of the cross-sectional structure of the impeller in some embodiments of the present application.

[0056] FIG2 is a schematic diagram of the cross-sectional structure of the impeller in some embodiments of the present application.

[0057] FIG3 is a schematic structural diagram of the impeller in some embodiments of the present application.

[0058] FIG4 is a schematic structural diagram of the impeller in some embodiments of the present application.

[0059] FIG5 is a schematic diagram of a fan assembly according to some embodiments of the present application (with reference to various components).

[0060] FIG6 is a schematic diagram of the fan assembly described in some embodiments of the present application (showing dimensional relationships).

[0061] FIG7 is a schematic three-dimensional diagram of a guide grid according to some embodiments of the present application.

[0062] FIG. 8 is an axial view of a guide fence according to some embodiments of the present application.

[0063] FIG9 is a schematic diagram of a local area of ​​the guide grid in FIG8 .

[0064] FIG. 10 is a schematic diagram of a guide fence according to another embodiment of the present invention.

[0065] FIG11 is a schematic diagram of a guide fence according to yet another embodiment of the present invention.

[0066] FIG12 is a schematic diagram of a local area of ​​the guide grid in FIG11 .

[0067] FIG13 is a schematic diagram of a guide grid according to yet another embodiment of the present invention.

[0068] FIG14 is a schematic diagram of a guide fence according to yet another embodiment of the present invention.

[0069] FIG15 is a schematic diagram of a guide grid according to yet another embodiment of the present invention.

[0070] FIG16 is a schematic diagram of a guide grid according to yet another embodiment of the present invention.

[0071] FIG17 is a cross-sectional view of a guide fence according to some embodiments of the present application.

[0072] Figure 18 is a schematic diagram of the bearing seat in some embodiments of the present application (showing the first side).

[0073] Figure 19 is a top view of the bearing seat in some embodiments of the present application.

[0074] Figure 20 is a schematic diagram of the bearing seat in some embodiments of the present application (showing the second side).

[0075] Figure 21 is a front view of the bearing seat in some embodiments of the present application.

[0076] Figure 22 is a cross-sectional view of the bearing seat in some embodiments of the present application.

[0077] FIG23 is a schematic diagram of a partial structure of an outer rotor motor in some embodiments of the present application.

[0078] FIG24 is a partial structural cross-sectional view of an outer rotor motor in some embodiments of the present application.

[0079] FIG25 is an exploded view of a portion of the structure of an outer rotor motor in some embodiments of the present application.

[0080] FIG. 26 is a schematic diagram of a cover in some embodiments of the present application.

[0081] Figure 27 is a schematic diagram of a power cord assembly in some embodiments of the present application.

[0082] FIG28 is a schematic diagram of a wire outlet nozzle in some embodiments of the present application.

[0083] FIG29 is a schematic diagram of a fan assembly in some embodiments of the present application.

[0084] FIG30 is a cross-sectional view of a fan assembly in some embodiments of the present application.

[0085] FIG31 is an enlarged view of the portion marked A in FIG30 .

[0086] Figure 32 is a schematic diagram of the installation bracket in some embodiments of the present application.

[0087] FIG33 is an enlarged view of the portion marked B in FIG32 .

[0088] Figure 34 is a schematic diagram of the first mounting plate in some embodiments of the present application.

[0089] Figure 35 is a schematic diagram of the second mounting plate in some embodiments of the present application.

[0090] FIG36 is a schematic diagram of stacked plates in some embodiments of the present application.

[0091] Figure 37 is a schematic diagram of support legs in some embodiments of the present application.

[0092] FIG38 is a schematic diagram of an air treatment device according to some embodiments of the present application.

[0093] FIG39 is a schematic diagram of an air treatment device according to another embodiment of the present application.

[0094] FIG40 is a schematic diagram of an air treatment device according to another embodiment of the present application.

[0095] 1 , a first portion 1121 , a second portion 1122 , a second end plate 12 , a blade 13 , an air inlet 101 , a motor 20 , a rotor assembly 21 , a rotor shaft 211 , a rotor housing 212 , a lug 213 , a stator assembly 22 , a bearing seat 221 , a wire hole 2201 , a plate portion 2211 , a sleeve portion 2212 , a groove 2202 , a reinforcing rib 222 , a first radial rib 2221 , a first annular rib 2222 , a second radial rib 2223 , a second annular rib 2224 , a first rib 2231 , a first positioning hole 2241 , a first positioning protrusion 2242 , a second rib 2232 , a second positioning hole 2243 , a second positioning protrusion 2244 , a third rib 2233 , an annular groove 22 45, second notch 2248, fourth rib 2234, boss 2246, third positioning hole 2247, fifth rib 2235, sixth rib 2236, core assembly 225, pin 2251, upper insulating frame 2252, stator winding 2253, stator core 2254, lower insulating frame 2255, power cord assembly 226, circuit board 2261, wiring harness 2262, outlet nozzle 2263, first laminated part 2264, second laminated part 2265, lead channel 2266, cover 227, inner ring 2271, outer ring 2272, top plate 2273, opening 2274, card convex 2275, first notch 2276, third notch 2277 277, positioning rib 2278, pin fixing member 228, first bearing 231, second bearing 232, guide fence 30, ring fence 31, first ring fence 311, second ring fence 312, first straightening strip 32, straightening layer 320, first portion 3211, second portion 3212, first guide portion 3221, second guide portion 3222, second straightening strip 33, positioning member 34, mounting bracket 40, first mounting plate 41, first panel 411, first ventilation hole 4111, first mounting hole 4112, fourth mounting hole 4113, first folded edge 412, connecting hole 4121, convex rib portion 4122, first corner portion 4123, fourth notch 412 4, second mounting plate 42, second panel 421, second mounting hole 4211, foolproof hole 4212, second folded edge 422, stacked plate 43, jack 431, flange 432, third mounting hole 433, third folded edge 434, third corner portion 435, fifth notch 4351, support leg 44, end 4401, first support section 441, second support section 442, third support section 443, bent section 444, air guide ring 45, air inlet end 451, air outlet end 452, first screw 461, second screw 462, third screw 463, positioning column 471, U-shaped plate 481, side plate 482, heat exchanger 200, cabinet 300, center of gravity 102. DETAILED DESCRIPTION

[0096] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0097] As shown in Figures 1 to 4, the impeller 10 in the embodiment of the present application includes a first end plate 11, a second end plate 12 and a plurality of blades 13, and the plurality of blades 13 are spaced apart along the circumference of the impeller 10. The second end plate 12 is provided with an air inlet 101. The second end plate 12 and the first end plate 11 are spaced apart along the air inlet direction, and the blades 13 connect the first end plate 11 and the second end plate 12. When the air flow enters the impeller 10 through the air inlet 101, the rotation of the blades 13 generates power, thereby promoting the flow of the air flow. Among them, the first end plate 11 may include a first plate portion 111 and a second plate portion 112, the first plate portion 111 and the second plate portion 112 are connected, and the second plate portion 112 is arranged around the periphery of the first plate portion 111.

[0098] In some embodiments of the present application, the second plate portion 112 may extend obliquely in the direction of air intake away from the axis of the impeller 10. This can guide the airflow to flow out of the impeller 10 more smoothly, reduce flow disturbances and unnecessary resistance, thereby reducing flow losses, optimizing the dynamic effect of the airflow, controlling the flow direction of the airflow, reducing flow losses and turning losses of the airflow, and improving the working efficiency of the impeller 10.

[0099] Among them, the second plate portion 112 can be configured to have a non-linear cross-section passing through the axis of the impeller 10. For example, the second plate portion 112 is in a curved shape, a combination of a curve and a straight line, or multiple straight lines. The non-linear second plate portion 112 can reduce the turning angle that the airflow needs to go through when flowing out of the impeller 10 through a reasonable curve design, reduce the vortex and energy loss generated during the turning process, and thus improve the efficiency of the impeller 10. In addition, the non-linear second plate portion 112 can also control the flow rate, flow direction and vortex generation of the airflow, making the airflow more stable, reducing backflow and vortexes, and thus reducing the energy loss and vortex loss of the airflow.

[0100] Referring to FIG. 1 , in some embodiments, the cross section is radially divided into at least two segments, for example, two, three, four, or five segments. The at least two segments include a first segment 1121 close to the axis of the impeller 10 and a second segment 1122 further away from the axis of the impeller 10. That is, the first segment 1121 is closer to the axis of the impeller 10 than the second segment 1122, and the second segment 1122 is further away from the axis of the impeller 10 than the first segment 1121. For example, the first segment 1121 may be located at the end of the second plate portion 112 close to the axis of the impeller 10, and the second segment 1122 may be located at the end of the second plate portion 112 further away from the axis of the impeller 10. The angle between the first segment 1121 and the axis of the impeller 10 is a1, and the angle between the second segment 1122 and the axis of the impeller 10 is a2, with the angle a1 being greater than the angle a2. In the present application, the first segment 1121 can be in the shape of a curve, a broken line, a curve, or a combination thereof. When the first segment 1121 is a straight line, the angle a1 is the angle between the straight line and the axis of the impeller 10, and this angle is greater than the maximum angle a2 between the second segment 1122 and the axis of the impeller 10. When the first segment 1121 is a non-straight line, the angle a1 is the angle between the tangent of the first segment 1121 at different positions and the axis of the impeller 10. The angle a1 being greater than the angle a2 means that the angle between the tangent at each position of the first segment 1121 and the axis of the impeller 10 is greater than the angle between the second segment 1122 and the axis of the impeller 10. In addition, the second segment 1122 can also be in the shape of a curve, a broken line, a curve, or a combination thereof. The angle between the second segment 1122 and the axis of the impeller 10 can refer to the previous description.

[0101] By making the angle a1 between the first section 1121 and the axis of the impeller 10 greater than the angle a2 between the second section 1122 and the axis of the impeller 10, a relatively smooth change in the angle between the second plate portion 112 and the axis of the impeller 10 can be achieved, and a smooth transition of the airflow from the first plate portion 111 to the second plate portion 112 can be achieved. The airflow will turn more smoothly when leaving the impeller 10, which can reduce the vortex and turning loss generated when the airflow turns, optimize the distribution and flow direction control of the airflow, and improve the efficiency and performance of the impeller 10.

[0102] In some embodiments, at least one of the at least two sections has an angle with the axis of the impeller 10 that gradually decreases in the direction away from the axis of the impeller 10. In other words, the angle between the tangent line of at least one section at different positions in the direction away from the axis of the impeller 10 and the axis of the impeller 10 gradually decreases. For example, the first section 1121 or the second section 1122 is configured to have an angle with the axis of the impeller 10 that gradually decreases. The angle with the axis of the impeller 10 gradually decreases in the direction away from the axis of the impeller 10, that is, the angle between the direction of the airflow and the axis of the impeller 10 gradually decreases as the distance from the axis of the impeller 10 gradually increases. This can facilitate the cross-section to change smoothly in the direction away from the axis of the impeller 10. When the angle gradually decreases, the energy loss of the airflow when it flows out of the impeller 10 gradually decreases, thereby improving the efficiency of the impeller 10.

[0103] In some embodiments, at least one of the at least two sections maintains a constant angle with the axis of the impeller 10 in a direction away from the axis of the impeller 10. Specifically, among the at least two sections, one section may maintain a constant angle with the axis of the impeller 10 in a direction away from the axis of the impeller 10, or any of the two or more sections may maintain a constant angle with the axis of the impeller 10 in a direction away from the axis of the impeller 10. The constant angle with the axis of the impeller 10 in a direction away from the axis of the impeller 10 means that the angle between the flow direction of the airflow in this section and the axis of the impeller 10 remains constant and does not change with increasing distance from the axis of the impeller 10. The flow velocity and flow direction of the airflow when passing through this section do not change significantly, and the flow state is relatively stable, which helps to improve the stability of the impeller 10.

[0104] In some embodiments, at least one of the at least two sections is in a straight line shape. It is understood that at least one section is in a straight line shape, and the angle between the second plate portion 112 in a straight line shape and the axis of the impeller 10 is fixed, that is, the angle between at least one section and the axis of the impeller 10 in the direction away from the axis of the impeller 10 remains unchanged. As with the above embodiment, the advantage of such a setting is that in this section, the airflow can flow out of the impeller 10 in a straight line, reducing the tortuosity of the flow and the generation of vortices, and achieving smooth flow. In the straight line section, the flow velocity and direction of the airflow change less when flowing through, reducing flow losses and improving the efficiency of the impeller 10.

[0105] In some embodiments, at least one of the at least two sections is in the shape of a smooth arc, and moves away from the first end plate 11 in a direction away from the axis of the impeller 10, and the angle between the second plate portion 112 and the axis of the impeller 10 gradually decreases. It can be understood that at least one section is in the shape of a smooth arc, and the angle between the second plate portion 112 in the shape of an arc and the axis of the impeller 10 is variable, and the angle between the second plate portion 112 and the axis of the impeller 10 gradually decreases in a direction away from the axis of the impeller 10. Similar to the aforementioned embodiment, the angle between the direction of the airflow and the axis of the impeller 10 gradually decreases as the distance from the axis of the impeller 10 gradually increases. The airflow with a smaller angle with the axis of the impeller 10 is more likely to bypass the impeller 10 and flow out, which is beneficial to reducing flow loss and turning loss.

[0106] In some embodiments, adjacent segments of at least two segments transition smoothly; at least two segments transition smoothly with the first plate portion 111. Specifically, the second plate portion 112 transitions smoothly with the first plate portion 111, and the adjacent segments of the second plate portion 112 transition smoothly with each other. This smooth transition can reduce discontinuity and turbulence in the airflow between the two segments, lowering flow resistance and improving the efficiency of the impeller 10. This smooth transition can also mitigate airflow shock and disturbances, reduce vibration and noise, and improve the stability of the impeller 10. Furthermore, this smooth transition can reduce airflow impact and stress concentration on the impeller 10 and related accessories, reducing the risk of wear and fatigue and extending the service life of the equipment.

[0107] In some embodiments, the angle a between the cross section and the axis of the impeller 10 gradually decreases. Specifically, the angle a between the second plate portion 112 and the axis of the impeller 10 in the cross section passing through the axis of the impeller 10 generally decreases. As the angle a decreases, the direction of the airflow out of the impeller 10 gradually approaches the direction of the impeller 10 axis, reducing refraction and deflection of the airflow and reducing flow losses. The gradually decreasing angle a increases the outflow velocity of the airflow at the outlet of the impeller 10, thereby improving the operating efficiency of the impeller 10.

[0108] In some embodiments, the cross-section is a smooth curve. Specifically, the second plate portion 112 is generally smooth and curved in a cross-section passing through the axis of the impeller 10. The smooth curve of the second plate portion 112 can reduce flow resistance, optimize airflow guidance, better guide airflow out of the impeller 10, and improve the operating efficiency and stability of the impeller 10.

[0109] In some embodiments, the angle a between the second plate portion 112 and the axis of the impeller 10 is configured to be 30°≤a≤90°. Specifically, the angle a between the second plate portion 112 and the axis of the impeller 10 is configured to be 30°≤a≤90°. For example, the angle a between the second plate portion 112 and the axis of the impeller 10 can be configured to be 30°, 40°, 45°, 80°, 85°, 90°, etc. In conjunction with the aforementioned embodiment, the second plate portion 112 includes at least a first section 1121 and a second section 1122. The angle formed between the first section 1121 and the axis of the impeller 10 is a1, and the maximum angle formed between the second section 1122 and the axis of the impeller 10 is a2. The angle a between the second plate portion 112 and the axis of the impeller 10 is configured to be 30°≤a≤90°. That is, the angle a1 between the first section 1121 and the axis of the impeller 10 is configured to be 30°≤a1≤90°, and the maximum angle a2 between the second section 1122 and the axis of the impeller 10 is configured to be 30°≤a2≤90°, with a2 being less than a1. This configuration can provide a suitable airflow deflection angle, accelerate the airflow at the outlet, reduce backflow and turbulence near the impeller 10, help reduce vibration and noise, and improve the operating efficiency of the impeller 10.

[0110] In some embodiments, the radial span L of the second plate portion 112 and the outer diameter D01 of the second end plate 12 satisfy 10% ≤ L / D01 ≤ 25%. Specifically, referring to FIG4 , the radial span L of the second plate portion 112 and the outer diameter D01 of the second end plate 12 are L, and the outer diameter D01 of the second end plate 12 are D01. The ratio of the radial span L of the second plate portion 112 to the outer diameter D01 of the second end plate 12 can be set to 10% ≤ L / D01 ≤ 25%. For example, the ratio of L to D01 can be set to 10%, 13%, 18%, 20%, 22%, 25%, etc. By limiting the L / D01 ratio to an appropriate range, the structural strength and fluid dynamic performance of the impeller 10 can be balanced. When the ratio of L to D01 is too large, the radial span L of the second plate portion 112 is too large, given the same outer diameter D01 of the second end plate 12. This causes the airflow to turn from radial to axial direction when passing through the impeller 10. This large radial span leads to significant turning losses, resulting in low efficiency for the impeller 10. When the ratio of L to D01 is too small, the radial span L of the second plate portion 112 is too small, given the same outer diameter D01 of the second end plate 12. This excessively small span L may restrict the flow of air around the second plate portion 112, increasing airflow resistance and thus reducing the efficiency of the impeller 10. Furthermore, if the length of the first plate portion 111 remains unchanged, a second plate portion 112 with an excessively small span may result in a gap between the blades 13 that is too small to allow sufficient air to pass through, resulting in airflow obstruction and reduced flow rate.

[0111] In some embodiments, the ratio of the radial span L of the second plate portion 112 to the outer diameter D01 of the second end plate 12 can be set within a range of 14% ≤ L / D01 ≤ 18%. For example, the ratio of L to D01 can be set to 14%, 14.5%, 15%, 17%, 17.5%, 18%, etc. This ratio range can be found by comprehensively considering the structural strength, fluid dynamic characteristics, and manufacturing cost of the impeller 10. By limiting the ratio of L to D01 to between 14% and 18%, the second plate portion 112 can be appropriately sized in the radial direction, thereby improving the operating efficiency of the impeller 10 while withstanding the operating pressure of the impeller 10. Of course, the selection of the above ratio range is based on engineering practice and experience. In different product designs and application scenarios, the ratio of the radial span L of the second plate portion 112 to the outer diameter D01 of the second end plate 12 can also range from greater than 18% or 25% to less than 14% or 10%, and this application does not impose any restrictions on this.

[0112] In some embodiments, the outer diameter D02 of the first end plate 11 and the outer diameter D01 of the second end plate 12 satisfy the relationship 50% ≤ D02 / D01 ≤ 100%. Specifically, referring to FIG4 , the outer diameter of the first end plate 11 is D02, and the outer diameter of the second end plate 12 is D01. The ratio of the outer diameter D02 of the first end plate 11 to the outer diameter D01 of the second end plate 12 can be set to 50% ≤ D02 / D01 ≤ 100%. For example, the ratio of D02 to D01 can be set to 50%, 55%, 60%, 80%, 95%, 100%, etc. By limiting the ratio of D02 to D01 to between 50% and 100%, an appropriate radial gap between the first end plate 11 and the second end plate 12 can be ensured to accommodate airflow and avoid excessive resistance. If the ratio of D02 to D01 is too large, the radial gap between the first end plate 11 and surrounding components becomes excessively large, resulting in airflow leakage or flow loss. Furthermore, airflow turns from radial to axial direction as it passes through impeller 10, resulting in a large radial span and significant turning losses, leading to low efficiency of impeller 10. When the ratio of D02 to D01 is too small, the diameter of first end plate 11 becomes too small, narrowing the radial gaps between adjacent blades 13. This makes it difficult for fluid to pass through impeller 10, increases flow resistance, and hinders airflow, reducing the efficiency of impeller 10. To maintain the same flow rate and speed requirements, a higher rotational speed is required, increasing energy consumption. At high rotational speeds, friction losses and air resistance increase, and noise levels are also higher.

[0113] In some embodiments, the outer diameter D02 of the first end plate 11 and the outer diameter D01 of the second end plate 12 can be set to 60%≤D02 / D01≤70%. For example, the ratio of D02 to D01 can be set to 60%, 62%, 65%, 68%, 70%, etc. Within this ratio range, an appropriate radial gap can be provided to ensure that the airflow can pass smoothly through the impeller 10 and reduce the risk of fluid leakage. At the same time, this ratio range can also provide structural strength and stability of the impeller 10 and reduce the adverse effects of excessive speed and high noise. Of course, the selection of the above ratio range is based on engineering practice and experience. In different product designs and application scenarios, the ratio range of the outer diameter D02 of the first end plate 11 and the outer diameter D01 of the second end plate 12 can also be greater than 70% or 100%, and less than 60% or 50%. This application does not impose any restrictions on this.

[0114] In some embodiments, the first plate portion 111 and the air inlet 101 are opposite to each other along the axis of the impeller 10, and the projection of the air inlet 101 on the first end plate 11 along the axis of the impeller 10 falls into the first end plate 11. Specifically, referring to Figures 1 to 4, axis D in the figures is the axis of the impeller 10, the first plate portion 111 is located on the first end plate 11 and surrounds the circumference of the axis of the impeller 10, the air inlet 101 is located on the second end plate 12 and surrounds the circumference of the axis of the impeller 10, the first end plate 11 and the second end plate 12 are opposite to each other along the axis of the impeller 10, and the first plate portion 111 and the air inlet 101 are opposite to each other along the axis of the impeller 10, which can better guide the airflow from the air inlet 101 into the impeller 10. The projection of the air inlet 101 on the first end plate 11 along the axis of the impeller 10 falls on the first end plate 11. It can be understood that on the projection plane perpendicular to the axis of the impeller 10, the diameter of the air inlet 101 is smaller than the diameter of the first end plate 11. Since the diameter of the air inlet 101 is small, when the air flow passes through the air inlet 101 and enters the internal space of the impeller 10 with a larger diameter, eddies or vortices may be generated. The gas moves at a higher speed in the vortex, which helps to increase the flow speed of the air flow; in addition, the diameter of the air inlet 101 is smaller than the diameter of the first end plate 11. When the air flow passes through the air inlet 101, it will cause compression of the air flow, thereby increasing the frequency of mutual collisions between gas molecules, accelerating the movement speed of the gas, ensuring that the air flow passes through the impeller 10 better, and improving the working efficiency of the impeller 10.

[0115] In some embodiments, the cross-section of the first plate portion 111 passing through the axis of the impeller 10 is in a straight line shape and is perpendicular to the axis of the impeller 10. Specifically, referring to Figures 1 to 4, the first plate portion 111 can provide stable support and positioning for the blades 13 to ensure that the blades 13 maintain the correct position and stability during operation. The straight line shape of the first plate portion 111 and its perpendicularity to the axis of the impeller 10 help the blades 13 obtain stable support during operation, and can also maintain a minimum gap between the blades 13 and the first plate portion 111 to reduce airflow leakage and loss. In addition, the straight line shape and vertical positioning can also ensure good symmetry between the blades 13 and the first plate portion 111, so as to further optimize the operational stability of the impeller 10.

[0116] In some embodiments, the inner edge of the end portion 4401 of the blade 13 is connected to the first plate portion 111, and the outer edge is connected to the second plate portion 112. Specifically, referring to FIG1 , the end portion 4401 of the blade 13 is connected to the first end plate 11, wherein the inner edge of the end portion 4401 of the blade 13 is connected to the first plate portion 111, and the outer edge is connected to the second plate portion 112. By connecting the inner edge of the blade 13 to the first plate portion 111, stable support and positioning are provided, ensuring safe and smooth operation of the blade 13 in the impeller 10. The outer edge of the blade 13 is connected to the second plate portion 112, which can guide airflow out of the impeller 10. In addition, this connection method can also ensure a good seal between the blade 13 and the first plate portion 111 and the second plate portion 112, reducing leakage and airflow loss.

[0117] In some embodiments, the radial dimension of the rotating structure formed by the inner edges and / or outer peripheries of the plurality of blades 13 varies along the axis of the impeller 10. This can increase the power of the impeller 10. In some embodiments, the outer diameter of the first end plate 11 is smaller than the outer diameter of the second end plate 12. This can increase wind pressure and improve the power of the impeller 10, thereby reducing energy consumption and improving energy utilization.

[0118] Another object of the present application is to provide a fan assembly 100 , which includes the aforementioned impeller 10 .

[0119] According to the fan assembly 100 in the embodiment of the present application, the fan assembly 100 includes a motor 20 and the impeller 10 described in any of the above embodiments. The motor 20 is disposed on the first end plate 11 of the impeller 10. Specifically, the fan assembly 100 includes the motor 20 and the impeller 10, wherein the rotating shaft of the motor 20 is disposed on the first end plate 11 of the impeller 10. The first end plate 11 supports the rotating shaft of the motor 20 and transmits the power of the motor 20 to the impeller 10. The motor 20 is directly connected to the impeller 10 through the first end plate 11, and the blades 13 are driven to rotate by rotating the rotating shaft of the motor 20.

[0120] According to the fan assembly 100 in the embodiment of the present application, by applying the aforementioned impeller 10, the structure and shape of the first end plate 11 of the impeller 10 can be improved. Under the same airflow output, the impact and turbulence between the airflow and other components can be reduced, thereby improving the working efficiency of the impeller 10 and reducing the energy consumption and noise level of the fan assembly 100.

[0121] 5 and 6 , in some embodiments of the present application, the motor 20 includes a rotor assembly 21 and a stator assembly 22. The rotor assembly 21 is sleeved onto the stator assembly 22 to be assembled together, and the rotor assembly 21 can rotate relative to the stator assembly 22. The rotor assembly 21 includes a rotor housing 212, which is inserted into the impeller 10 along the axis of the impeller 10. By inserting the rotor housing 212 into the interior of the impeller 10, the axial dimension of the fan assembly 100 can be reduced, thereby reducing the space occupied in the axial direction.

[0122] Optionally, in some embodiments of the present application, the impeller 10 includes a first end plate 11, a second end plate 12 and a plurality of blades 13, the first end plate 11 includes a first plate portion 111 and a second plate portion 112, the first plate portion 111 is for the rotor housing 212 to pass through, so that the rotor housing 212 is inserted into the interior of the impeller 10, and the first plate portion 111 is used to be connected and fixed to the rotor housing 212, the second plate portion 112 surrounds the first plate portion 111, the plurality of blades 13 are arranged on the second plate portion 112, and the plurality of blades 13 surround the rotor housing 212, and the air inlet 101 is arranged in the axial direction of the rotor housing 212.

[0123] In some embodiments, the depth of the rotor housing 212 inserted into the impeller 10 needs to satisfy H1 / H0≤H2 / H0*6%*(D2 / D1) ^ 2, H0 represents the axial dimension of the rotor housing 212, H1 represents the axial depth of the rotor housing 212 inserted into the impeller 10, H2 represents the axial distance between the first plate portion 111 and the air inlet 101, D1 represents the radial dimension of the rotor housing 212, and D2 represents the average value of the sum of the radial dimension D21 of the first plate portion 111 and the radial dimension D22 of the air inlet 101.

[0124] By ensuring that the insertion depth of the rotor housing 212 satisfies H1 / H0≤H2 / H0*6%*(D2 / D1)^2, the rotor housing 212 can be prevented from being inserted too deeply and blocking the air flow channel of the impeller 10, thereby ensuring the efficiency of the fan assembly 100, thereby achieving a balance between space occupancy and the efficiency of the fan assembly 100.

[0125] Specifically, the motor 20 is connected to the impeller 10 in a driving manner, so that the impeller 10 can be driven to rotate. The rotation of the impeller 10 forms a negative pressure, thereby sucking air to achieve air flow. The driving connection between the motor 20 and the impeller 10 is achieved through the rotor assembly 21 of the motor 20. Specifically, the motor 20 includes a stator assembly 22 and a rotor assembly 21. It can be understood that in the motor 20, the fixed part can be regarded as the stator assembly 22, and the rotatable part can be regarded as the rotor assembly 21. The stator assembly 22 and the rotor assembly 21 need to be assembled together, and the rotor assembly 21 can rotate relative to the stator assembly 22. Since the fan assembly 100 is in the form of an outer rotor, the assembly of the rotor assembly 21 and the stator assembly 22 is that the rotor assembly 21 is mounted on the stator assembly 22 and is rotatable relative to the stator assembly 22. The rotor assembly 21 includes a rotor housing 212, which can be regarded as the external structure of the rotor assembly 21. The magnetic tiles of the rotor assembly 21 are fixed to the inner surface of the rotor housing 212. The changes in the magnetic field on the stator assembly 22 act on the magnetic tiles of the rotor assembly 21, thereby causing the rotor assembly 21 to rotate relative to the stator assembly 22. The impeller 10 is fixed to the rotor housing 212. The rotation of the rotor assembly 21 drives the impeller 10 to rotate, thereby driving the airflow.

[0126] The impeller 10 is secured to the rotor housing 212 via the first end plate 11. The first end plate 11 includes a first plate portion 111 and a second plate portion 112. The first plate portion 111 is configured to cooperate with the rotor housing 212, thereby securing the first end plate 11 to the rotor housing 212. The second plate portion 112 surrounds the first plate portion 111 and is configured to cooperate with the blades 13, securing the blades 13. Referring to Figures 5 and 6, the first plate portion 111 is annular and defines a through hole (not shown). The first plate portion 111 is sleeved onto the rotor housing 212 through the through hole. Specifically, the rotor housing 212 passes through the through hole of the first plate portion 111 and is mounted on the first plate portion 111. This allows the rotor housing 212 to be inserted into the interior of the impeller 10. The rotor housing 212 is connected to the first plate portion 111. Thus, the first end plate 11 is secured to the rotor housing 212, securing the impeller 10. It can be understood that the connection between the rotor housing 212 and the first plate portion 111 can be a direct connection or an indirect connection, as long as the first end plate 11 can be fixed to the rotor housing 212. There are also many ways of connection, such as screw connection, welding, fusion, snap connection, etc., which can be selected according to actual conditions and are not limited in this embodiment.

[0127] The interior of the impeller 10 is the space surrounded by the blades 13. The blades 13 include a plurality of blades 13. The plurality of blades 13 are arranged on the second plate portion 112 and are arranged along the circumference of the second plate portion 112. In this way, the plurality of blades 13 surround the rotor housing 212. That is, the rotor housing 212 is inserted into the space surrounded by the plurality of blades 13, that is, inserted into the interior of the impeller 10, and the air inlet 101 is arranged in the axial direction of the rotor housing 212. The so-called axial direction is the extension direction of the rotation axis of the impeller 10, that is, the up and down direction in Figure 5. The blades 13 are arranged below the first end plate 11. The air inlet 101 is arranged below the first end plate 11 and is surrounded by the blades 13. The rotor housing 212 passes through the first plate portion 111 from top to bottom and is inserted into the interior of the impeller 10. The airflow passes through the air inlet 101 from bottom to top and enters the space surrounded by the plurality of blades 13, and then passes between two adjacent blades 13 and is thrown out.

[0128] The rotor housing 212 is inserted into the interior of the impeller 10, which can reduce the space occupied by the fan assembly 100 in the axial direction. However, if the rotor housing 212 is inserted too deep, the flow of air will be hindered. Therefore, in this embodiment, the axial depth of the rotor housing 212 inserted into the impeller 10 is limited, so as to take into account both the space occupied and the efficiency of the fan assembly 100, that is, it is necessary to satisfy H1 / H0≤H2 / H0*6%*(D2 / D1)^2, for example, H1 / H0 is H 2 / H0*6%*(D2 / D1)^2, H2 / H0*5*(D2 / D1)^2, H2 / H0*4*(D2 / D1)^2, H2 / H0*3*(D2 / D1)^2, H2 / H0*2*(D2 / D1)^2, or H2 / H0*1*(D2 / D1)^2. After extensive testing by the applicant, it has been found that satisfying this condition prevents the rotor housing 212 from being inserted too deeply and affecting the flow of air, thereby ensuring the efficiency of the fan assembly 100. In particular, the axial depth of the rotor housing 212 inserted into the impeller 10 satisfies H1 / H0≤H2 / H0*4.5%*(D2 / D1)^2. This effectively reduces the axial space occupied and further optimizes the obstruction to the airflow, resulting in a higher efficiency of the fan assembly 100. It can be understood that the axial depth of the rotor housing 212 inserted into the impeller 10 is the axial dimension of the portion of the rotor housing 212 inside the impeller 10 (the space surrounded by the blades 13 ).

[0129] As can be seen from the above, by limiting the insertion depth of the rotor housing 212, the obstruction of the airflow by the rotor housing 212 can be avoided to a limited extent, but the rotor housing 212 cannot be inserted too shallowly, otherwise the compression effect on the axial dimension of the fan assembly 100 will not be obvious, and the reliability of the fan assembly 100 will be reduced.

[0130] 5 and 6 , the fan assembly 100 further includes a first bearing 231 and a second bearing 232, and the rotor assembly 21 includes a rotor shaft 211, which is fixed relative to the rotor housing 212. When the rotor assembly 21 is sleeved onto the stator assembly 22, the rotor shaft 211 passes through the first bearing 231 and the second bearing 232. The first bearing 231 and the second bearing 232 are arranged alternately along the axial direction. The first bearing 231 is closer to the air inlet 101 than the second bearing 232, that is, the second bearing 232 is farther away from the air inlet 101 than the first bearing 231. In the orientation shown in FIG5 , the first bearing 231 is located below the second bearing 232. By setting the first bearing 231 and the second bearing 232, support for the rotor assembly 21 is achieved, and the friction resistance of the rotation of the rotor assembly 21 can be reduced. Since the rotor housing 212 needs to be inserted into the interior of the impeller 10, if the insertion depth of the rotor housing 212 is too shallow, the center of gravity 102 of the component consisting of the impeller 10 and the rotor assembly 21 (hereinafter referred to as the rotating component) will be further away from the first bearing 231 (lower relative to the first bearing 231), so that the load on the first bearing 231 is too large, thereby reducing the service life and reliability of the entire fan assembly 100. For this reason, it is also necessary to optimize the lower limit of the insertion depth of the rotor housing 212, that is, it is necessary to meet H3 / H0≤H1 / H0, where H3 is the distance between the end face of the rotor housing 212 and the first bearing 231 The axial distance (the end face of the rotor housing 212 can be understood as follows: a plane perpendicular to the axial direction is defined, and the plane approaches the rotor housing 212 from bottom to top along the axial direction until it contacts the rotor housing 212. The portion of the rotor housing 212 that contacts the plane is considered the end face). By setting it in this way, while satisfying the axial space optimization of the fan assembly 100 and taking into account the efficiency of the fan assembly 100, it can also avoid excessive load on the first bearing 231 caused by the rotor housing 212 being inserted too shallowly, effectively ensuring the reliability and stability of the shaft system of the fan assembly 100 (first bearing 231, second bearing 232), thereby ensuring the service life. In particular, the axial depth of the rotor housing 212 inserted into the impeller 10 satisfies 1.2*H3 / H0≤H1 / H0, which further takes into account the efficiency and reliability of the fan assembly 100.

[0131] As shown in FIG6 , in some embodiments of the present application, as mentioned above, the rotor assembly 21 and the impeller 10 constitute a rotating component. Since the rotor housing 212 needs to be inserted into the interior of the impeller 10, the center of gravity 102 of the rotating component is inevitably located between the air inlet 101 and the rotor housing 212. By limiting the insertion depth of the rotor housing 212 as mentioned above, the efficiency and reliability of the fan assembly 100 can be effectively balanced. In this embodiment, the position of the center of gravity 102 of the rotating component is limited, thereby further improving the reliability of the shaft system (first bearing 231, second bearing 232) of the fan assembly 100. That is, the axial distance between the center of gravity 102 of the rotating component and the first bearing 231 is H4, and the value range of H4 is 0 to 40 mm, for example, H4 is 0 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, or 40 mm.

[0132] As shown in FIG5 , in some embodiments of the present application, a lug 213 is provided on the circumferential surface of the rotor housing 212. The lug 213 is connected to the first plate portion 111 to achieve mutual fixation between the first end plate 11 and the rotor housing 212. Specifically, the lug 213 can be a separate component fixed to the rotor housing 212 by a connection method, and the lug 213 protrudes from the circumferential surface of the rotor housing 212. Alternatively, the lug 213 and the rotor housing 212 can be integrally formed. The first plate portion 111 is flat. When the rotor housing 212 passes through the first plate portion 111, the lug 213 abuts against the first plate portion 111 to form surface contact. The lug 213 and the first plate portion 111 are then connected and fixed. The connection and fixation between the lug 213 and the first plate portion 111 can be screwed, welded, snap-fitted, or other methods. The more reliable and convenient method is to use screws to achieve mutual fastening.

[0133] As shown in Figure 5, in some embodiments of the present application, the second plate portion 112 is inclined from the first plate portion 111 and away from the direction where the air inlet 101 is located, that is, the second plate portion 112 shown in Figure 5 is inclined upward from the first plate portion 111. Since the blades 13 are arranged on the second plate portion 112, the inclination of the second plate portion 112 is conducive to increasing the size of the blades 13 and facilitating the airflow to flow upward.

[0134] As shown in Figures 5 and 6, in some embodiments of the present application, the fan assembly 100 further includes a second end plate 12, the first end plate 11 and the second end plate 12 are arranged alternately, the first end plate 11 is located above the second end plate 12, and the blades 13 are arranged between the first end plate 11 and the second end plate 12. One end of the blade 13 is arranged on the second plate portion 112 of the first end plate 11, and the other end of the blade 13 is arranged on the second end plate 12. The second end plate 12 is formed with the above-mentioned air inlet 101. When the impeller 10 rotates, it is subjected to centrifugal force. The support hub and the second end plate 12 improve the structural strength of the entire impeller 10 and prevent the blades 13 from shaking during rotation.

[0135] 5 and 6 , in some embodiments of the present application, the impeller 10 is a mixed flow impeller 10. The mixed flow impeller 10 can cause air to move both centrifugally and axially, thereby forming a mixed flow of air. Higher efficiency can be achieved by using the mixed flow impeller 10. As shown in FIG38 to FIG40 , the air inlet 101 of the mixed flow impeller 10 is downwardly open. Air enters the mixed flow impeller 10 from bottom to top through the air inlet 101 and is then ejected axially and radially by the mixed flow impeller 10, causing the air to continue flowing upward.

[0136] The fan assembly 100 was subjected to a performance test, wherein H0=55mm, H2=163mm, H3=26mm, D1=102mm, and D2=207mm. The efficiency of the fan assembly 100 was tested in accordance with the "GB / T 1236-2017 Standardized Air Duct Performance Test for Industrial Fan Assembly 100", and the estimated life of the first bearing 231 was tested in accordance with the "ISO 281 Standard: Ensuring the Accuracy and Reliability of Rolling Bearing Life Assessment". The results are shown in the following table. It can be seen that the technical solution of the present application can, on the one hand, reduce the axial dimension of the entire fan assembly 100, thereby reducing the axial space occupied and ensuring the efficiency of the fan assembly 100, and on the other hand, can effectively improve the shaft system reliability of the fan assembly 100, thus taking into account various performance indicators.

[0137] As shown in FIG7 and FIG8 , the fan assembly 100 further includes a guide fence 30 . The guide fence 30 may be disposed opposite to the impeller along the axis of the impeller.

[0138] Among them, the guide fence 30 includes multiple ring fences 31 and multiple first straightening bars 32. The multiple ring fences 31 and multiple first straightening bars 32 are connected into a grid shape, and the multiple first straightening bars 32 are distributed around the center of the guide fence 30. When the airflow passes through the guide fence 30, the airflow can be rectified under the rectifying action of the first straightening bars 32, so that the airflow can flow smoothly after passing through the guide fence 30, thereby reducing the noise during the airflow circulation process and improving the energy efficiency of the airflow driving structure.

[0139] In addition, the airflow passing through the guide fence 30 may be uneven, and therefore, the straightening requirements may vary across the guide fence 30. Therefore, the multiple first straightening bars 32 in this application may be distributed unevenly along the circumference of the guide fence 30 (see direction BB in the accompanying drawings). "Non-uniform distribution along the circumference of the guide fence 30" may include, but is not limited to: at least two sections along the circumference of the guide fence 30 with different distribution densities of the first straightening bars 32; or at least two sections along the circumference of the guide fence 30 with the same area but different numbers of first straightening bars 32. The multiple first straightening bars 32 are distributed around the center of the guide fence 30 and are distributed unevenly along the circumference of the guide fence 30. When an uneven airflow flows through the guide fence 30, airflow with different turbulence or flow velocities can pass through the first straightening bars 32 with different distribution densities on the guide fence 30, thereby straightening the airflow, thereby improving the stability of the airflow after passing through the guide fence 30 and reducing eddy current noise. Furthermore, airflow becomes smoother after passing through the guide fence 30, reducing the impact on downstream components. For example, when the guide fence 30 is positioned upstream of the impeller 10, it can reduce the impact of uneven airflow on the impeller 10, thereby improving the stability of the impeller 10 and enhancing its energy efficiency.

[0140] Of course, the plurality of first straightening bars 32 may also be arranged to be evenly distributed along the circumference of the guide fence 30 .

[0141] The ring grating 31 in the present application can be configured to extend along the center of the guide fence 30, and the first straightening bar 32 can be configured to extend in the radial direction of the guide fence 30 (refer to the direction C1-C2 in the drawings). The ring grating 31 can be configured in a ring shape extending along the circumference of the guide fence 30, or can be configured to include multiple segments distributed along the circumference of the guide fence 30. Furthermore, the first straightening bar 32 can also be configured in the shape of a long strip extending in the radial direction of the guide fence 30, or can be configured to include multiple segments distributed along the radial direction of the guide fence 30. The first straightening bar 32 can be configured in a straight strip shape, an arcuate strip shape, a zigzag strip shape, etc., and the ring grating 31 can be configured in a arcuate strip shape, a zigzag strip shape, etc.

[0142] In some embodiments of the present application, the plurality of first straightening bars 32 include a plurality of straightening layers 320 arranged from the inside to the outside along the radial direction of the guide fence 30. The plurality of straightening layers 320 are arranged from the inside to the outside along the radial direction of the guide fence 30, and each straightening layer 320 is provided with a plurality of first straightening bars 32 distributed unevenly around the center of the guide fence 30. The plurality of first straightening bars 32 straighten the gas, reduce turbulence, and ensure a relatively uniform distribution of the airflow velocity through the guide fence 30.

[0143] The arrangement of the plurality of first rectifying bars 32 in the present application includes but is not limited to the following description.

[0144] As shown in Figure 9, in a first embodiment, at least a portion of the first straightening bars 32 of one of the adjacent straightening layers 320 are radially opposed to the first straightening bars 32 of the other, and the radially opposed first straightening bars 32 are connected to form strips extending in the radial direction. For example, a portion of the first straightening bars 32 of the first straightening layer 320 of the adjacent straightening layers 320 are radially opposed to the first straightening bars 32 of the second straightening layer 320 and connected to form strips; or, all of the first straightening bars 32 of the first straightening layer 320 of the adjacent straightening layers 320 are radially opposed to the first straightening bars 32 of the second straightening layer 320 and connected to form strips. This can improve the structural strength of the guide gate 30, giving the guide gate 30 a longer service life, simplify the structure of the guide gate 30, facilitate the production and processing of the guide gate 30, and optimize the guide effect of the guide gate 30.

[0145] As shown in Figures 8 and 10, in a second embodiment, at least a portion of the first straightening bars 32 of one of each two adjacent straightening layers 320 is radially opposed to at least a portion of the first straightening bars 32 of the other, and the radially opposed first straightening bars 32 are connected to form a long strip extending in the radial direction and connected to the innermost first ring grid 311 and the outermost second ring grid 312 of the multiple ring grids 31. Connecting the radially opposed first straightening bars 32 into a straight, long strip extending in the radial direction facilitates production. Furthermore, the long strip structure formed by connecting the multiple first straightening bars 32 can be connected to the multiple ring grids 31, so that there are multiple connection points between the long strip structure and the multiple ring grids 31. When the same airflow passes through the connection points between the multiple ring grids 31 and the first straightening bars 32 in the guide grid 30, it staggers and enters the four through holes surrounding the connection points, thereby enabling the guide grid 30 to adjust the flow state of the gas.

[0146] As shown in Figures 11 and 12, in the third embodiment, at least some of the first straightening bars 32 of two adjacent straightening layers 320 are radially offset. For example, some of the first straightening bars 32 of one straightening layer 320 in adjacent straightening layers 320 are offset from the first straightening bars 32 of the other straightening layer 320; or, all of the first straightening bars 32 of one straightening layer 320 in adjacent straightening layers 320 are radially offset from the first straightening bars 32 of the other straightening layer 320. It can be understood that when the first straightening bars 32 of two adjacent straightening layers 320 are radially offset, the number of connection points between the first straightening bars 32 and the ring grid 31 between the two straightening layers 320 is greater. When the same airflow passes through the connection point between the ring grid 31 and the first straightening bars 32 between the two straightening layers 320 in the guide grid 30, it enters the three through-holes around the connection point in an offset manner, thereby adjusting the flow state of the gas.

[0147] As shown in Figure 11, in the fourth embodiment, a portion of the first straightening bars 32 of two adjacent straightening layers 320 are radially opposite to each other and another portion is radially offset. For example, a portion of the first straightening bars 32 of the first straightening layer 320 in the adjacent straightening layers 320 is radially opposite to the first straightening bars 32 of the second straightening layer 320, and another portion of the first straightening bars 32 of the first straightening layer 320 is offset from the first straightening bars 32 of the second straightening layer 320. The radially opposite first straightening bars 32 can be connected into strips extending radially. It is understandable that when the airflow passes through the connection point between the ring grid 31 and the first straightening bars 32 between the two straightening layers 320 in the guide grid 30, a portion is offset to enter the four through holes around the connection point, and another portion is offset to enter the three through holes around the connection point, thereby achieving different degrees of adjustment of the flow state of the gas between the two straightening layers 320.

[0148] In the fifth embodiment, the plurality of rectifying layers 320 include a first rectifying layer 320, a second rectifying layer 320, and a third rectifying layer 320 that are radially adjacent to each other. At least a portion of the first rectifying bars 32 of the second rectifying layer 320 are radially opposite to the first rectifying bars 32 of the first rectifying layer 320 and are radially offset from the first rectifying bars 32 of the third rectifying layer 320. It is understood that the first rectifying bars 32 of the first rectifying layer 320 and the first rectifying bars 32 of the second rectifying layer 320 are radially opposite to each other. When the same airflow passes through the connection point between the ring grid 31 and the first rectifying bars 32 between the first rectifying layer 320 and the second rectifying layer 320 in the guide grid 30, it staggers and enters the four through-holes surrounding the connection point. Since the first rectifying bar 32 of the second rectifying layer 320 and the first rectifying bar 32 of the third rectifying layer 320 are staggered, the number of connection points between the ring grid 31 and the first rectifying bar 32 between the second rectifying layer 320 and the third rectifying layer 320 is greater than the number of connection points between the ring grid 31 and the first rectifying bar 32 between the first rectifying layer 320 and the second rectifying layer 320. When the same airflow passes through the connection point between the ring grid 31 and the first rectifying bar 32 between the second rectifying layer 320 and the third rectifying layer 320 in the guide grid 30, it is staggered to enter the three through holes around the connection point, thereby achieving different degrees of adjustment of the flow state of the gas.

[0149] As shown in Figure 11, in the sixth embodiment, the guide fence 30 includes a first portion 3211 and a second portion 3212. The first portion 3211 and the second portion 3212 can be distributed along the circumference of the guide fence 30, along the radial direction of the guide fence 30, or in other directions. In the first portion 3211, the first straightening bars 32 of two adjacent straightening layers 320 are radially opposed and connected to form long strips. In the second portion 3212, at least some of the first straightening bars 32 of two adjacent straightening layers 320 are staggered. The above arrangements of the first straightening bars 32 all enable the first portion 3211 and the second portion 3212 to adjust the gas flow state to varying degrees along the circumference of the guide fence 30. The first straightening bars 32 can be configured differently based on the environments in which different parts of the guide fence 30 are located, thereby achieving separate rectification of the airflow in different regions.

[0150] Of course, the above description is only a partial description of the arrangement of multiple first rectifier bars 32 in the present application, and is not intended to limit the scope of protection of the present application. Ordinary technicians in this field can make changes, modifications, replacements, deformations and combinations of the above embodiments within the scope of the present application, which are all within the scope of protection of the present application.

[0151] As shown in Figure 8 , in combination with the aforementioned embodiments, in some embodiments of the present application, the guide fence 30 has a first guide portion 3221 and a second guide portion 3222 along the circumferential direction. The distribution density of the first straightening strips 32 in the first guide portion 3221 is different from the distribution density of the first straightening strips 32 in the second guide portion 3222. The first guide portion 3221 and the second guide portion 3222 can be arranged in different configurations. The first straightening strips 32 in the first guide portion 3221 and the second guide portion 3222 can be arranged in the manner shown in the aforementioned embodiments or in other configurations. The first guide portion 3221 and the second guide portion 3222 can be arranged in the following configurations.

[0152] In a first example, the first guide portion 3221 is provided with a second guide portion 3222 on both sides of the circumference of the guide fence 30. It can be understood that the flow state of the gas is adjusted to different degrees by the first guide portion 3221 and the second guide portion 3222 on the circumference of the guide fence 30.

[0153] In the second example, the first guide portions 3221 and the second guide portions 3222 are alternately distributed in the circumferential direction of the guide grid 30. It is understandable that because the first guide portions 3221 and the second guide portions 3222 are alternately distributed in the circumferential direction, when the airflow passes through the guide grid 30, the alternating first guide portions 3221 and second guide portions 3222 in the circumferential direction of the guide grid 30 adjust the flow state of the gas to varying degrees.

[0154] In a third example, the guide fence 30 has a first guide portion 3221 and a second guide portion 3222 , and the turbulence or flow velocity of the airflow toward the first guide portion 3221 is higher than that toward the second guide portion 3222 .

[0155] The distribution density of the first straightening bars 32 in the first guide portion 3221 can be set higher than the distribution density of the first straightening bars 32 in the second guide portion 3222. Providing more first straightening bars 32 in locations with higher turbulence or flow velocity facilitates straightening in those areas. It should be noted that the "distribution density of first straightening bars 32" refers to the number of first straightening bars 32 distributed within a predetermined range, for example, the number of first straightening bars 32 in an area that sweeps a predetermined angle around the center of the guide grid 30.

[0156] Furthermore, it can be configured such that, within the same angular range along the circumference of the guide fence 30, the ratio of the number N1 of the first straightening bars 32 in the first guide portion 3221 to the number N2 of the first straightening bars 32 in the second guide portion 3222 satisfies the following: 1.1 ≤ N1 / N2 ≤ 40. A larger ratio increases the distribution density of the first straightening bars 32 and achieves a more pronounced straightening effect on turbulent flow.

[0157] It should be noted that the values ​​of N1 and N2 refer to the number of first straightening bars 32 within an area of ​​a certain angle, and can be rounded off or rounded to an integer. For example, if, using rounding, there is an average of 6° along the circumference of the guide fence 30, and the predetermined angle is 30°, N1 can be set to be no less than 5 and no more than 20, and N2 can be set to be no less than 1 and no more than 5.

[0158] The guide fence 30 in the present application may further include a third guide portion, a fourth guide portion, and the like.

[0159] In addition, the first guide portion 3221 can be configured as a fan-shaped portion with an angular arc α greater than 0° and no greater than 120°; or the second guide portion 3222 can be configured as a fan-shaped portion with an angular arc β greater than 0° and no greater than 120°. The arrangement of the first guide portion 3221 and the second guide portion 3222 can be adjusted based on the speed and turbulence of the airflow along the circumference of the guide groove in actual conditions to meet the requirements for adjusting the gas flow state in the circumferential direction of the guide grid 30. Further, the first guide portion 3221 can be configured as a fan-shaped portion with an angular arc α greater than 30° and no greater than 90°; or the second guide portion 3222 can be configured as a fan-shaped portion with an angular arc β greater than 0° and no greater than 120°; or the second guide portion 3222 can be configured as a fan-shaped portion with an angular arc β greater than 30° and no greater than 90°.

[0160] In particular, taking the case where the first guide portion 3221 and the second guide portion 3222 are alternately arranged along the circumference of the guide groove, and the first guide portion 3221 and the second guide portion 3222 are configured in a fan shape as an example, the arrangement of the first guide portion 3221 and the second guide portion 3222 includes but is not limited to:

[0161] In a first implementation, the plurality of first guide portions 3221 have the same angular arc α, and the plurality of second guide portions 3222 have different angular arc β. For example, along the circumference of the guide fence 30, there are two first guide portions 3221 with an angular arc α of 100°, one second guide portion 3222 with an angular arc β of 40°, and one second guide portion 3222 with an angular arc β of 120°.

[0162] In a second implementation, the first guide portions 3221 have different angular radians α, while the second guide portions 3222 have the same angular radian β. For example, along the circumference of the guide fence 30, there is one first guide portion 3221 with an angular radian α of 40°, one first guide portion 3221 with an angular radian α of 100°, and two second guide portions 3222 with an angular radian β of 120°.

[0163] In a third implementation, the angular radian α of the plurality of first guide portions 3221 is the same as the angular radian β of the plurality of second guide portions 3222 ;

[0164] In a fourth implementation, the angular radians α of the plurality of first guide portions 3221 are the same, and the angular radians β of the plurality of second guide portions 3222 are the same, but the angular radians α of the plurality of first guide portions 3221 are not equal to the angular radians β of the plurality of second guide portions 3222;

[0165] In a fifth implementation, the angular radians α of the plurality of first air guide portions 3221 are different, and the angular radians β of the plurality of second air guide portions 3222 are different.

[0166] In addition, the positional relationship between the first guide portions 3221 and the second guide portions 3222 of the present application is adjusted through the above-described implementation method. The multiple first guide portions 3221 can be adjusted to be centrally symmetrical about the center of the guide grid 30, and the multiple second guide portions 3222 can be adjusted to be centrally symmetrical about the center of the guide grid 30. Furthermore, the multiple first guide portions 3221 or the multiple second guide portions 3222 can be adjusted to be non-centrally symmetrical about the center of the guide grid 30. Alternatively, the multiple first guide portions 3221 and the multiple second guide portions 3222 can be adjusted to be mirror-symmetrical, and the multiple second guide portions 3222 can be adjusted to be mirror-symmetrical.

[0167] In some embodiments of the present application, the angular arc α of the first air guide portion 3221 can be set to be no less than 30° and no greater than 90°, and the angular arc β of the second air guide portion 3222 can be set to be no less than 30° and no greater than 90°. It should be noted that the angular arc α and the angular arc β can adjust the airflow conditions at various circumferential positions of the guide grid 30 by satisfying the above-mentioned implementation method.

[0168] In some embodiments of the present application, the ring grid 31 is configured in a ring shape extending around the center of the guide grid 30. Multiple ring grids 31 are arranged radially from the inside to the outside of the guide grid 30 (see direction C1 → C2 in the accompanying drawings). The connection of the multiple ring grids 31 with the multiple first straightening bars 32 forms a grid-like structure that adjusts the flow state of the gas.

[0169] In some embodiments of the present application, the minimum inner diameter of the ring grating 31 is not less than 150 mm and not greater than 400 mm. The ring grating 31 can be configured to expand outward, contract inward, or in other forms in the axial direction, wherein the inner diameter of the position of the ring grating 31 at the smallest distance from the axis is the minimum inner diameter of the ring grating 31. For example, the minimum inner diameter of the ring grating 31 can be set to 160 mm, 200 mm, 250 mm, 300 mm, or 400 mm. The above data are for reference only and are not intended to limit the present application. By setting the inner diameters of different ring gratings 31, the inner diameter difference between adjacent ring gratings 31 can also be adjusted. When there are three or more ring gratings 31, the multiple ring gratings 31 will have two or more inner diameter differences. The multiple ring gratings 31 can be configured to have a varying or constant inner diameter difference from the inside to the outside, thereby adjusting the size of the through-holes in different radial regions. For example, the multiple inner diameter differences can be configured to gradually increase from the inside to the outside, remain the same from the inside to the outside, or gradually decrease from the inside to the outside.

[0170] As shown in Figure 17, in some embodiments of the present application, the axial height of the multiple ring grids 31 gradually increases from the outside to the inside of the radial direction of the guide grid 30, and the axial direction can refer to the up and down direction in the accompanying drawings. The multiple ring grids 31 and the multiple first straightening strips 32 form an arcuate shape, which is conducive to the airflow being diverted from the inside to the outside when contacting the guide grid 30 and evenly passing through the multiple through holes. The axial height of the ring grid 31 can be set to the height of the middle position of the ring grid 31 along the axial direction relative to the reference plane; it can also be set to the height of one side edge of the ring grid 31 relative to the reference plane, etc. The reference plane can be the normal plane of the axis, such as the plane where the edge of the second ring grid 312 facing away from the first ring grid 311 is located. The side edge of the ring grid 31 can be the edge of the ring grid 31 close to the second ring grid 312.

[0171] In some embodiments of the present application, the plurality of ring gratings 31 are configured in a ring shape, and the plurality of ring gratings 31 include a first ring grating 311 located innermost, wherein the inner side of the first ring grating 311 can be set to be hollow. When the inner side of the first ring grating 311 is hollow, airflow passes directly through the inner side of the first ring grating 311, reducing energy loss. A cover plate can also be provided on the inner side of the first ring grating 311. After a portion of the airflow impacts the cover plate, it passes through the through holes on the outer side of the first ring grating 311 from the inside out along the radial direction of the guide fence 30.

[0172] As shown in Figures 13 to 17 , in some other embodiments of the present application, second straightening bars 33 are provided inside the first ring grid 311. By providing the second straightening bars 33 inside the innermost first ring grid 311, a straightening structure is formed inside the first ring grid 311, thereby adjusting the airflow conditions inside the first ring grid 311. Multiple second straightening bars 33 can be provided inside the first ring grid 311, and the multiple second straightening bars 33 can be arranged in a diverging pattern.

[0173] The number of second straightening bars 33 can be set to be no greater than the number of first straightening bars 32 located outside the first ring grid 311 and connected to the first ring grid 311. Generally, the turbulence inside the first ring grid 311 is lower than that outside the first ring grid 311. Providing fewer second straightening bars 33 can both adjust the airflow conditions inside the first ring grid 311 and reduce energy loss in the airflow inside the first ring grid 311. Of course, depending on the distribution of airflow turbulence or velocity, the number of second straightening bars 33 inside the first ring grid 311 can also be set to be greater than the number of first straightening bars 32 located outside the first ring grid 311 and connected to the first ring grid 311.

[0174] In some examples, the second rectifying bar 33 inside the first ring gate 311 does not extend out of the two axial sides of the multiple ring gates 31, wherein the multiple ring gates 31 can be set to have consistent axial heights or inconsistent axial heights, and the two ends of the area covered by the projections of the multiple ring gates 31 on the axis can be set as the two axial sides of the ring gates 31.

[0175] In addition, the axial heights of the second straightening strips 33 at various locations along the radial direction may be the same or different, thereby adjusting the flow of the gas.

[0176] In some embodiments of the present application, the axial heights of the plurality of ring grids 31 gradually increase radially from the outside to the inside, while the axial heights of the second straightening bars 33 gradually decrease radially from the outside to the inside. The second straightening bars 33 are concave to reduce the flow resistance of the airflow passing through the inner side of the first ring grid 311.

[0177] In some embodiments of the present application, the plurality of ring gates 31 include a first ring gate 311 located at the innermost side and a second ring gate 312 located at the outermost side.

[0178] As shown in FIG17 , in some embodiments, the axial height of the first grating ring 311 relative to the second grating ring 312 is not less than 40 mm and not more than 75 mm. In other words, the difference between the axial height of the first grating ring 311 and the axial height of the second grating ring 312 is not less than 40 mm and not more than 75 mm.

[0179] In addition, a second straightening bar 33 may be provided inside the first ring grating 311, with a minimum axial height of not less than 10 mm and not more than 50 mm relative to the second ring grating 312. That is, the second straightening bar 33 is provided inside the first ring grating 311, and the difference between the minimum axial height of the second straightening bar 33 and the axial height of the second ring grating 312 is not less than 10 mm and not more than 50 mm. It should be noted that, with the plane of the edge of the second ring grating 312 axially facing away from the first ring grating 311 as the reference plane, the "axial height of the first ring grating 311" refers to the distance from the plane of the lower edge of the first ring grating 311 to the reference plane in the axial direction, such as H5; and the "minimum axial height of the second straightening bar 33 and the second ring grating 312" refers to the distance from the plane of the lower edge of the second ring grating 312 at the position closest to the second ring grating 312 in the axial direction to the reference plane, such as H6. When the second rectifying bar 33 is perpendicular to the axis, the closest distances between the second rectifying bar 33 and the second ring gate 312 are consistent; when the second rectifying bar 33 is inclined relative to the axis, the closest distances between the second rectifying bar 33 and the second ring gate 312 are inconsistent.

[0180] In some embodiments of the present application, the plurality of first straightening bars 32 are centrally symmetrically distributed relative to the center of the guide fence 30. Depending on actual needs, the plurality of first straightening bars 32 may be non-centrally symmetrically distributed relative to the center of the guide fence 30. By arranging the first straightening bars 32 to be centrally symmetrically distributed or non-centrally symmetrically distributed relative to the center of the guide fence 30, a non-uniform distribution of the first straightening bars 32 in the circumferential direction of the guide fence 30 is achieved.

[0181] In some embodiments of the present application, positioning members 34 are further included. The second positioning members 34 are distributed along the circumference of the guide fence 30 on the outer side of the second ring fence 312 on the outermost side of the guide fence 30. The positioning members 34 can fix the guide fence 30 to the air inlet 101 and are arranged so that the guide fence 30 is opposite to the airflow to achieve maximum contact between the airflow and the guide fence 30. It should be noted that the connection methods between the guide fence 30 and the air inlet 101 include but are not limited to snap connection, bolt connection, or welding.

[0182] A ventilation device including the aforementioned fan assembly 100 includes the fan assembly 100, a heat exchanger 200, and the aforementioned guide grille 30. The heat exchanger 200 exchanges heat with the airflow, and the fan assembly 100 is used to drive the airflow through the guide grille 30 and the heat exchanger 200. This ventilation device utilizes the aforementioned guide grille 30 and possesses the technical advantages of the aforementioned guide grille 30.

[0183] In which, the guide fence 30 has a first guide portion 3221 and a second guide portion 3222. Under the driving action of the fan assembly 100, the airflow will flow into the guide fence 30, wherein the flow rate of the airflow flowing into the first guide portion 3221 is different from the flow rate of the airflow flowing into the second guide portion 3222, or the turbulence of the airflow flowing into the first guide portion 3221 is different from the turbulence of the airflow flowing into the second guide portion 3222. Therefore, the first guide portion 3221 and the second guide portion 3222 can be set as first straightening strips 32 with different densities.

[0184] For example, if the airflow velocity to the first guide portion 3221 is higher than the airflow velocity to the second guide portion 3222, the distribution density of the first straightening strips 32 of the first guide portion 3221 can be set to be higher than the distribution density of the first straightening strips 32 in the second guide portion 3222; for another example, if the airflow turbulence to the first guide portion 3221 is higher than the airflow turbulence to the second guide portion 3222, the distribution density of the first straightening strips 32 of the first guide portion 3221 can be set to be higher than the distribution density of the first straightening strips 32 in the second guide portion 3222.

[0185] Of course, for different types of heat exchangers 200, the turbulence or velocity distribution of the generated airflow in the circumferential direction is different, and the distribution density of the first straightening strips 32 in the guide grid 30 can be adjusted according to the actual distribution of the turbulence or velocity of the airflow.

[0186] In some embodiments of the present application, the guide fence 30 and the heat exchanger 200 are opposite each other along the axis of the guide fence 30. The guide fence 30 includes a first guide portion 3221 and a second guide portion 3222. The distance between the first guide portion 3221 and the heat exchanger 200 is greater than the distance between the second guide portion 3222 and the heat exchanger 200. The distribution density of the first straightening strips 32 in the first guide portion 3221 is higher than the distribution density of the first straightening strips 32 in the second guide portion 3222. The greater distance between the first guide portion 3221 and the heat exchanger 200 results in a higher velocity and turbulence of the airflow as it passes through the first guide portion 3221. Therefore, by varying the distribution density of the first straightening strips 32 in different regions, uniform airflow guidance can be achieved, improving the stability of the airflow after it passes through the guide fence 30 and reducing airflow noise.

[0187] Experiments were conducted on ventilation devices without a guide fence 30, with a comparative guide fence 30, and with the guide fence 30 of the present application to investigate noise reduction and blade 13 transmission efficiency. The results show that, in terms of noise reduction, the noise OA value after installing the guide fence 30 was significantly reduced compared to the device without the guide fence 30. The overall OA value of the ventilation device using the guide fence 30 of the present application was reduced by 5.2. In terms of blade 13 transmission efficiency, compared to the comparative guide fence 30, the ventilation device with the guide fence 30 of the present application had a higher blade 13 transmission efficiency, and the energy utilization rate of the fan assembly 100 in the ventilation device with the guide fence 30 of the present application was higher. These results demonstrate that the guide fence 30 of the present application achieves good noise reduction while also taking into account the energy utilization rate of the fan assembly 100.

[0188] In some embodiments of the present application, the stator assembly 22 includes a bearing seat 221 and a core assembly 225. The bearing seat 221 has a plurality of wire holes 2201, and the core assembly 225 is mounted on the bearing seat 221. The wire holes 2201 can be configured to allow the core assembly 225 to lead out a wiring harness.

[0189] In addition, in some embodiments, the stator assembly 22 realizes the output of the stator assembly 22 through the power cord assembly 226, thereby improving the reliability of the output and the assembly efficiency of the motor 20. Referring to Figures 18 to 27, in the embodiments of the present application, by providing a power cord assembly 226 on the bearing seat 221, the power cord assembly 226 is used for stable output, thereby improving the output efficiency of the stator assembly 22 and improving the connection stability of the wiring harness 2262. The power cord assembly 226 and the core assembly 225 are respectively arranged on opposite sides of the bearing seat 221, and the lead-out structure of the core assembly 225 passes through the wire hole 2201 and is electrically connected to the power cord assembly 226; this arrangement can realize the output of the stator assembly 22, improve the stability of the output, and improve the assembly efficiency of the motor 20.

[0190] More specifically, the power cord assembly 226 and the core assembly 225 are respectively arranged on opposite sides of the bearing seat 221, and a plurality of wire holes 2201 are provided on the bearing seat 221. The lead wire structure of the core assembly 225 can pass through the wire hole 2201 from one side of the bearing seat 221 and pass through the wire hole 2201 from the other side of the bearing seat 221 to be electrically connected to the power cord assembly 226 arranged on the other side of the bearing seat 221, and the power cord assembly 226 can be used to be electrically connected to the electric control box, so that fixed The subassembly 22 is electrically connected to the electrical control box, and the power cord assembly 226 is arranged on the bearing seat 221, which has a high connection strength and can improve the connection stability of the wiring harness 2262; in addition, during assembly, the power cord assembly 226 is connected to the lead wire structure of the core assembly 225 and the electrical control box, that is, the output wire of the stator assembly 22 is transferred through the power cord assembly 226, which is more efficient than fixing the wiring harness 2262 by binding wires, thereby improving the production rhythm of the motor 20 during the production process.

[0191] Therefore, according to the stator assembly 22 in the embodiment of the present application, the output of the stator assembly 22 is realized through the power line assembly 226, which improves the stability of the output and improves the assembly efficiency of the motor 20.

[0192] 23 to 26 , in some embodiments of the present application, the stator assembly 22 further includes a cover 227 , which covers the bearing seat 221 , and the power cord assembly 226 includes a circuit board 2261 , which is disposed in the cover 227 , and a wiring harness 2262 of the power cord assembly 226 extends from the cover 227 ; in this way, the output stability of the stator assembly 22 can be improved, and the assembly efficiency of the motor 20 can be improved.

[0193] In detail, the power cord assembly 226 includes a circuit board 2261, and the circuit board 2261 is provided with wiring terminals or welding points, so that the lead wire structure of the core assembly 225 can pass through the wire hole 2201 and be quickly plugged into the wiring terminals on the circuit board 2261, or quickly welded to the welding points to achieve the electrical connection between the core assembly 225 and the circuit board 2261. Subsequently, the wiring harness 2262 of the power cord assembly 226 can be connected to the electrical control box to complete the electrical connection between the stator assembly 22 and the electrical control box; in short, the output wire of the stator assembly 22 can be fixed by the power cord assembly 226, and the switching function of the power cord assembly 226 can improve the assembly efficiency of the motor 20.

[0194] In addition, a cover 227 is provided on the bearing seat 221, and the cover 227 can cover the circuit board 2261 to protect the circuit board 2261, prevent external impact from damaging the circuit board 2261, improve the connection strength between the electric control box and the stator assembly 22, and prevent external dust and other pollutants from corroding the circuit board 2261; and in some specific examples, the box body of the electric control box is covered on the outside of the cover 227 to install the electric control box on the motor 20. The cover 227 can be made of insulating materials such as plastic. The circuit board 2261 can be separated from the electronic components in the electric control box by a predetermined safety distance through the cover 227 to provide insulation protection for the circuit board 2261.

[0195] Referring to Figures 21 to 25, in some embodiments of the present application, the bearing seat 221 includes a plate portion 2211 and a sleeve portion 2212, the plate portion 2211 has a first side surface and a second side surface opposite to each other along the axis, the sleeve portion 2212 is connected to the plate portion 2211 and extends along the axis of the plate portion 2211 in a direction away from the first side surface, the first side surface of the plate portion 2211 is provided with a third rib 2233, and the third rib 2233 is assembled with the periphery of the opening 2274 of the cover shell 227; in this way, the installation strength of the cover shell 227 on the bearing seat 221 can be improved.

[0196] Specifically, the bearing seat 221 is a part of the stator assembly 22 and is used to install bearings so that the rotor assembly 21 can rotate relative to the stator assembly 22. The rotor assembly 21 has a rotation axis, which is the axis of the plate portion 2211 of the bearing seat 221. During assembly, the sleeve portion 2212 is arranged on the second side of the plate portion 2211, and the core assembly 225 is arranged on the second side of the plate portion 2211 and is sleeved on the sleeve portion 2212. The first side of the plate portion 2211 is provided with a third rib 2233. The cover 227 has an opening 2274. The third rib 2233 is assembled with the periphery of the opening 2274 of the cover 227. The circuit board 2261 on the first side is covered in the cover 227. In this way, the installation strength of the cover 227 on the bearing seat 221 can be improved. The lead wire structure of the core assembly 225 passes through the wire hole 2201 from the second side and passes out from the first side to be connected to the circuit board 2261 on the first side. In addition, it should be understood that the third rib 2233 extends around the axis of the plate portion 2211. (The extending direction of the axis can be referred to the axis direction AA in the figure)

[0197] More specifically, in some embodiments of the present application, an annular groove 2245 is provided on the inner circumference of the third rib 2233 , and a latching protrusion 2275 is provided on the outer circumference of the cover shell 227 , and the latching protrusion 2275 is snap-connected to the annular groove 2245 to improve the installation strength of the cover shell 227 on the bearing seat 221 .

[0198] Among them, the inner circumference of the third rib 2233 is adapted to the outer circumference structure of the cover shell 227 to limit the cover shell 227, and when the third rib 2233 is matched with the structure of the cover shell 227, the annular groove 2245 on the inner circumference of the third rib 2233 can be snap-connected with the protrusion 2275 on the outer circumference of the cover shell 227 to further improve the installation strength of the cover shell 227 on the bearing seat 221.

[0199] In addition, since the annular groove 2245 is arranged on the inner circumference of the third rib 2233, in other words, the annular groove 2245 extends in the same direction as the third rib 2233, when the cover shell 227 is assembled, the cover shell 227 is rotated at any angle relative to the third rib 2233, and the locking protrusion 2275 on the outer circumference of the cover shell 227 can still be matched with the annular groove 2245 on the inner circumference of the third rib 2233, thereby facilitating the assembly of the motor 20.

[0200] In some embodiments of the present application, a plurality of wire holes 2201 are provided on the plate portion 2211 and are located on the inner side of the third rib 2233; with such a configuration, the plurality of wire holes 2201 can be covered by the cover shell 227, thereby improving the sealing performance of the stator assembly 22 to prevent pollutants from the external environment from entering the interior of the stator assembly 22, and also to prevent the lubricating oil in the stator assembly 22 from volatilizing.

[0201] In some embodiments of the present application, the core assembly 225 and the sleeve portion 2212 are interference fit to improve the connection strength between the core assembly 225 and the bearing seat 221 to improve the working reliability of the motor 20.

[0202] In some embodiments of the present application, radial ribs are provided on the first side surface of the plate portion 2211, and the peripheral wall of the cover shell 227 has a first notch 2276, and the radial ribs are passed through the first notch 2276; specifically, the radial ribs extend vertically along the axis of the plate portion 2211. During assembly, the cover shell 227 can be set on the bearing seat 221, wherein the radial ribs of the plate portion 2211 can be embedded in the first notch 2276 of the peripheral wall of the cover shell 227 to limit the cover shell 227 in the axial direction around the plate portion 2211 (i.e., the circumferential direction of the plate portion 2211), thereby improving the installation strength of the cover shell 227 on the bearing seat 221, so as to further improve the output stability of the stator assembly 22.

[0203] In addition, the plate portion 2211 has several wire holes 2201, and the radial ribs may include several of them. Radial ribs may be provided between two adjacent wire holes 2201. In other words, the radial ribs are used to separate the two adjacent wire holes 2201 to avoid the wire holes 2201 being too concentrated and weakening the structural strength of the plate portion 2211, thereby improving the reliability of the stator assembly 22.

[0204] In some embodiments of the present application, the third rib 2233 is not closed to construct a second notch 2248. The second notch 2248 can be used to lead out the wiring harness 2262 of the power cord assembly 226, thereby facilitating electrical connection between the power cord assembly 226 and the electrical control box.

[0205] In some embodiments of the present application, the peripheral wall of the cover 227 has a third notch 2277, and the third notch 2277 is used to lead out the wiring harness 2262 of the power cord assembly 226, so as to facilitate the electrical connection between the power cord assembly 226 and the electric control box.

[0206] In some embodiments of the present application, the third rib 2233 is not closed to construct the second notch 2248, the peripheral wall of the cover shell 227 has a third notch 2277, and the cover shell 227 has positioning ribs 2278 on opposite sides of the third notch 2277 along the circumferential direction, and the positioning rib 2278 is passed through the inner side of the second notch 2248; in this way, through the cooperation between the positioning rib 2278 and the second notch 2248, the circumferential positioning of the cover shell 227 on the bearing seat 221 can be achieved, so as to improve the installation strength of the cover shell 227 on the bearing seat 221, thereby improving the output stability of the stator assembly 22.

[0207] In this embodiment, the circumferential direction can be understood as the direction around the axis of the plate portion 2211.

[0208] In detail, the positioning rib 2278 can extend vertically along the axis of the plate portion 2211. During assembly, the cover shell 227 can be set on the bearing seat 221, wherein the positioning rib 2278 on the cover shell 227 can be passed through the inner side of the second notch 2248. In other words, the positioning rib 2278 on one side of the third notch 2277 can abut against the inner side of one side of the second notch 2248, and the positioning rib 2278 on the other side of the third notch 2277 can abut against the inner side of the other side of the second notch 2248. In this way, the second notch 2248 can cooperate with the positioning rib 2278 to achieve circumferential limitation of the cover shell 227, so that the second notch 2248 can correspond to the third notch 2277, forming a yield structure that is convenient for leading out the wiring harness 2262 of the power cord assembly 226.

[0209] In some embodiments of the present application, the peripheral wall of the cover 227 has a clearance space, and the power cord assembly 226 also includes a wiring harness 2262 and a wire outlet nozzle 2263, and the wire outlet nozzle 2263 is assembled with the edge of the clearance space; in this way, the wire outlet stability of the stator assembly 22 can be improved, and the sealing performance of the stator assembly 22 can be improved, thereby improving the working stability of the motor 20.

[0210] Specifically, in conjunction with the aforementioned embodiment, the outer circumference of the housing 227 includes a third notch 2277, which forms a clearance space. During assembly, the cable outlet nozzle 2263 can be mounted to the edge of the third notch 2277 by means of snapping, snapping, or bonding. The cable outlet nozzle 2263 can have cable outlet channels extending through opposite sides. The wiring harness 2262 of the power cord assembly 226 can be threaded through the cable outlet channels of the cable outlet nozzle 2263. The cable outlet nozzle 2263 secures the wiring harness 2262 in the third notch 2277 of the housing 227, thereby improving the stability of cable outlet from the stator assembly 22. Furthermore, the cable outlet nozzle 2263 can seal the third notch 2277, providing a well-sealed space within the housing 227, protecting the interior of the stator assembly 22 from external environmental influences and enhancing the operational stability of the motor 20.

[0211] In some embodiments of the present application, the wire outlet nozzle 2263 includes a first stacking portion 2264 and a second stacking portion 2265, and the first stacking portion 2264 and the second stacking portion 2265 are arranged along the radial direction of the cover shell 227, and are respectively stacked on the inner circumferential surface of the cover shell 227 and the outer circumferential surface of the cover shell 227; in this way, the connection strength between the wire outlet nozzle 2263 and the cover shell 227 can be improved, thereby improving the stability of the wire harness 2262 of the power cord assembly 226.

[0212] In detail, when the wire outlet nozzle 2263 is assembled with the edge of the clearance space, the first stacking portion 2264 of the wire outlet nozzle 2263 can be stacked on the inner circumference of the cover shell 227, and the second stacking portion 2265 can be stacked on the outer circumference of the cover shell 227 to increase the connection area between the wire outlet nozzle 2263 and the cover shell 227, thereby increasing the connection strength between the wire outlet nozzle 2263 and the cover shell 227, and the first stacking portion 2264 and the second stacking portion 2265 are arranged along the radial direction of the cover shell 227, so that the wire outlet nozzle 2263 is limited in the radial direction of the cover shell 227, thereby improving the stability of the wire harness 2262 of the power cord assembly 226.

[0213] In addition, the outlet channel of the outlet nozzle 2263 can pass through the first stacking portion 2264 and the second stacking portion 2265 respectively to achieve the outlet of the power cord assembly 226.

[0214] 26 , in some embodiments of the present application, the cover 227 includes an inner ring 2271, an outer ring 2272 and a top plate 2273. The outer ring 2272 surrounds the inner ring 2271. The inner periphery of the top plate 2273 is connected to the inner ring 2271, and the outer periphery is connected to the outer ring 2272. The inner ring 2271 is passed through the inner side of the sleeve portion 2212, and the outer ring 2272 is assembled with the third rib 2233. In this way, the sealing performance of the stator assembly 22 can be further improved, and the working reliability of the motor 20 can be improved.

[0215] Specifically, the outer ring 2272 of the cover shell 227 can be understood as the outer peripheral wall portion of the cover shell 227; the inner ring 2271 of the cover shell 227 can be understood as the inner peripheral wall portion of the cover shell 227, and the outer ring 2272 is located on the outside of the inner ring 2271. In combination with the aforementioned embodiment, the latch 2275, the first notch 2276 and the third notch 2277 are all provided on the outer ring 2272 of the cover shell 227; that is, the first notch 2276 and the third notch 2277 can be provided on the outer peripheral wall of the cover shell 227, and the first notch 2276 passes through the opposite sides of the outer peripheral wall of the cover shell 227, so that the radial ribs are conveniently passed through the first notch 2276 to realize the circumferential limitation of the cover shell 227; the third notch 2277 passes through the outer peripheral wall of the cover shell 227 The opposite sides of the wall are used to connect the internal space and the external space of the cover shell 227, so as to facilitate the power cord assembly 226 to be led out from the cover shell 227 through the third notch 2277; and a locking protrusion 2275 may be provided on the outer peripheral edge of the outer peripheral wall of the cover shell 227. When the cover shell 227 is assembled and matched with the third rib 2233, the outer peripheral edge of the cover shell 227 is adapted to the inner peripheral edge of the third rib 2233, wherein the locking protrusion 2275 on the outer ring 2272 of the cover shell 227 can be embedded and matched with the annular groove 2245 of the third rib 2233 to realize the assembly connection between the cover shell 227 and the third rib 2233; in short, the assembly of the cover shell 227 on the bearing seat 221 is realized by the assembly and cooperation between the outer ring 2272 of the cover shell 227 and the third rib 2233.

[0216] In addition, the bearing seat 221 also has an installation port, which is opposite to the sleeve portion 2212 along the axial direction of the plate portion 2211. The bearing can be installed in the sleeve portion 2212 through the installation port, and the rotating shaft of the rotor assembly 21 can be extended into the sleeve portion 2212 and set on the bearing seat 221 to facilitate the operation of the motor 20; when the cover shell 227 is assembled on the bearing seat 221, the inner ring 2271 of the cover shell 227 can be embedded in the installation port to seal the interior of the sleeve portion 2212, thereby improving the sealing performance of the stator assembly 22 and preventing dust and other pollutants from entering the interior of the sleeve portion 2212 and contaminating the bearing.

[0217] 25 , in some embodiments of the present application, the core assembly 225 has a pin 2251 , which passes through the wire hole 2201 and is electrically connected to the power cord assembly 226 ; this facilitates the wire output of the stator assembly 22 and improves the assembly efficiency of the stator assembly 22 .

[0218] Specifically, the pin 2251 is a hard structure. During assembly, the assembler can easily pass the pin 2251 of the core assembly 225 through the wire hole 2201 to connect it to the circuit board 2261 of the power cord assembly 226. The pin 2251 can be electrically connected to the circuit board 2261 by welding, and of course it can also be electrically connected by plugging and other connection methods. Compared with passing the flexible wiring harness 2262 through the wire hole 2201, the use of the pin 2251 can improve the assembly efficiency of the stator assembly 22.

[0219] 25 , in some embodiments of the present application, the stator assembly 22 further includes a pin 2251 fixing member, at least a portion of the pin 2251 fixing member is passed through the wire hole 2201 , and the pin 2251 is passed through the pin 2251 fixing member and is electrically connected to the power cord assembly 226 to improve the structural stability of the motor 20 .

[0220] Specifically, the pin 2251 fixing piece can be set on the second side surface of the bearing seat 221 and sleeved on the outside of the sleeve portion 2212. Then, the core assembly 225 can be sleeved on the outside of the sleeve portion 2212, and the pin 2251 of the core assembly 225 can be passed through the pin 2251 fixing piece, and at least a part of the pin 2251 fixing piece is passed through the wire hole 2201. In other words, the pin 2251 of the core assembly 225 can be passed through the wire hole 2201 via the pin 2251 fixing piece to achieve electrical connection with the circuit board 2261 of the power cord assembly 226. The pin 2251 fixing piece can be used to position the pin 2251 and protect the pin 2251 to stabilize the electrical connection between the core assembly 225 and the circuit board 2261, thereby improving the structural stability of the motor 20.

[0221] 25 , in some embodiments of the present application, the number of wire-passing holes 2201 is not less than the number of pins 2251 , and the pins 2251 include a plurality of pins, and the plurality of pins 2251 are respectively passed through the plurality of wire-passing holes 2201 ; in this way, the position of the power cord assembly 226 on the bearing seat 221 can be adjusted according to actual assembly requirements so that the power cord assembly 226 corresponds to the electronic components in the electric control box, thereby facilitating the electrical connection between the stator assembly 22 and the electric control box through the power cord assembly 226 after the stator assembly 22 is connected to the bearing seat 221 , thereby improving the flexibility of assembly.

[0222] 25 , in some embodiments of the present application, the core assembly 225 may include a pin 2251, an upper insulating frame 2252, a stator winding 2253, a stator core 2254 and a lower insulating frame 2255. The upper insulating frame 2252 and the lower insulating frame 2255 are respectively arranged at both ends of the stator core 2254. The stator winding 2253 is wound on the stator core 2254, and the pin 2251 is fixed on the upper insulating frame 2252. In this way, the normal operation of the motor 20 can be achieved.

[0223] Specifically, the stator winding 2253 is wound around the stator core 2254 to form a magnetic field. An upper insulating frame 2252 and a lower insulating frame 2255 are respectively disposed at both ends of the stator core 2254. After the motor 20 is assembled, the upper insulating frame 2252 and the lower insulating frame 2255 can separate the stator core 2254 from surrounding structural components, thereby providing insulation and protection for the stator core 2254. Furthermore, the upper insulating frame 2252 and the lower insulating frame 2255 can support and secure the stator core 2254, thereby improving the operating stability of the motor 20. The upper insulating frame 2252 is located at the end 4401 of the stator core 2254, and the pins 2251 can be fixed to the upper insulating frame 2252 to facilitate electrical connection between the core assembly 225 and the circuit board 2261.

[0224] In some specific examples, the lower end of the pin 2251 fixing part (i.e., the end close to the core assembly 225) is provided with a plurality of undercuts, and the corresponding core assembly 225 forms a whole after winding the winding, and the inner ring 2271 of the upper insulating skeleton 2252 in the core assembly 225 is provided with a plurality of positioning structures corresponding to the undercuts, and the width dimension of the undercuts is consistent with the width dimension of the positioning structure, and the end face of the undercuts abuts against the end face of the positioning structure, and there are a plurality of bosses 2246 on the top of the pin 2251 fixing part, and the boss 2246 is provided with a through hole, and the pin 2251 passes through the pin 2251 fixing part from the through hole, and the multiple bosses 2246 correspond one-to-one to the multiple wire holes 2201, and the multiple bosses 2246 can be passed through the wire holes 2201. In other words, the pin 2251 fixture is secured to the core assembly 225 via an undercut and positioning structure, and is secured to the pin 2251 via a through-hole, allowing the pin 2251 to be electrically connected to the circuit board 2261 via the pin 2251 fixture. During assembly, the upper and lower insulating frames 2255 and the stator core 2254 are secured to the upper and lower end surfaces of the stator core 2254 via the holes and columns. The coil is then wound. After winding is complete, the pin 2251 is inserted and secured to the upper insulating frame 2252. The pin 2251 fixture is then moved from top to bottom, ensuring that the through-holes of the pin 2251 fixture mate with the pin 2251, completing the installation of the pin 2251 fixture.

[0225] In some embodiments of the present application, the power cord assembly 226 is fixed to the bearing seat 221 through a fixing member; specifically, a first threaded hole is provided on the bearing seat 221, and a corresponding second threaded hole is also provided on the circuit board 2261 in the power cord assembly 226. Fasteners can be respectively inserted into the first threaded hole and the second threaded hole to achieve threaded engagement, thereby installing the circuit board 2261 on the first side surface of the bearing seat 221, thereby improving the installation strength of the circuit board 2261 on the bearing seat 221. Compared with the aforementioned method of fixing the output wire of the stator assembly 22 by binding wires, the power cord assembly 226 is rigidly connected to the bearing seat 221 through the circuit board 2261, which can greatly improve the output wire stability of the stator assembly 22 and improve the working stability of the motor 20.

[0226] In combination with the aforementioned embodiment, the plate portion 2211 has a mounting opening, and the periphery of the mounting opening may be provided with an annular reinforcing rib 222, that is, the reinforcing rib 222 extends along the circumference of the mounting opening, and a plurality of bosses 2246 may be provided on the reinforcing rib 222, and at least one of the plurality of bosses 2246 has a first threaded hole; optionally, the first threaded hole includes a plurality of first threaded holes, and the plurality of first threaded holes are arranged along the circumference of the mounting opening; and the plurality of wire holes 2201 are arranged around the mounting opening, and in the radial direction of the mounting opening, the plurality of wire holes 2201 are staggered with the boss 2246 to form an avoidance, so as to facilitate the installation of the circuit board 2261 on the plate portion 2211, and facilitate the electrical connection between the pin 2251 of the core assembly 225 and the circuit board 2261.

[0227] In addition, the cover shell 227 includes an inner ring 2271, an outer ring 2272 and a top plate 2273. The aforementioned latch 2275, the first notch 2276 and the third notch 2277 are all arranged on the outer ring 2272 of the cover shell 227. The plate portion 2211 has an installation port, which corresponds to the sleeve portion 2212. When the cover shell 227 is installed on the bearing seat 221, the inner ring 2271 of the cover shell 227 can be embedded in the installation port to close the installation port, prevent dust from entering the sleeve portion 2212 from the installation port, and improve the sealing performance of the stator assembly 22.

[0228] Furthermore, the power cord assembly 226 includes a wire outlet nozzle 2263 having a wire outlet channel for the wire harness 2262 to pass through. The wire outlet nozzle 2263 can cooperate with the edge of the third notch 2277 to be fixed to the housing 227, thereby securing the wire harness 2262 that is led out of the housing 227. The wire outlet nozzle 2263 includes a first laminated portion 2264 and a second laminated portion 2265. The first laminated portion 2264 and the second laminated portion 2265 are respectively laminated on the inner circumference of the housing 227 and the outer circumference of the housing 227 to improve the connection strength between the wire outlet nozzle 2263 and the housing 227, thereby improving the stability of the wire outlet of the power cord assembly 226.

[0229] Furthermore, the stator assembly 22 also includes a pin 2251 fixing part, which can be set on the second side surface of the plate portion 2211, and at least a portion of which is passed through the wire hole 2201 and is sleeved on the outside of the sleeve portion 2212, and the pin 2251 fixing part can be set at the end 4401 of the core component 225 to position the pin 2251 of the core component 225, thereby improving the electrical connection strength between the power cord component 226 and the circuit board 2261, and improving the working reliability of the motor 20.

[0230] According to the fan assembly 100 in the embodiment of the present application, the bearing seat 221 includes a plate portion 2211 and a sleeve portion 2212, the plate portion 2211 has a first side surface and a second side surface relative to each other, and a mounting opening and a plurality of wire holes 2201 passing through the first side surface and the second side surface, the sleeve portion 2212 is connected to the plate portion 2211, and is opposite to the mounting opening and extends along the axis of the mounting opening; wherein, the first side surface and / or the second side surface is provided with a reinforcing rib 222, and the reinforcing rib 222 is arranged around the mounting opening; such an arrangement can improve the structural strength of the bearing seat 221, thereby improving the reliability of the motor 20, and avoiding failure of the motor 20 due to the low structural strength of the bearing seat 221 during operation.

[0231] Generally speaking, the bearing seat 221 can be used in the motor 20, which includes a stator assembly 22 and a rotor assembly 21. The bearing seat 221 can be sleeved in the stator assembly 22 through the sleeve portion 2212 and relatively fixed with the stator assembly 22. The rotor assembly 21 includes a rotating shaft, which can be sleeved in the sleeve portion 2212 of the bearing seat 221, and the mounting port of the plate portion 2211 is used to set the bearing in the sleeve portion 2212. The rotating shaft of the rotor assembly 21 can be set on the bearing, so that the rotor assembly 21 can rotate relative to the stator assembly 22 to achieve normal operation of the motor 20.

[0232] Among them, the bearing seat 221 has a first side and a second side facing each other. When the motor 20 is assembled, the first side faces away from the stator assembly 22 and is provided with a circuit board 2261 of the motor 20. The second side faces the stator assembly 22, and a plurality of wire holes 2201 are provided on the plate portion 2211 of the bearing seat 221. Through the plurality of wire holes 2201, electrical connectors such as wiring harnesses 2262 and pins 2251 can be used to electrically connect the stator assembly 22 on the two opposite sides of the bearing seat 221 to the circuit board 2261, thereby facilitating the operation of the motor 20. Since the aforementioned plate portion 2211 has an installation opening and a plurality of wire holes 2201, these structures greatly reduce the structural strength of the bearing seat 221, which can easily cause the motor 20 to fail during operation. Therefore, a reinforcing rib 222 can be provided on the first side and / or the second side of the bearing seat 221. The reinforcing rib 222 is arranged around the installation opening, thereby improving the structural strength of the bearing seat 221 and avoiding the low structural strength of the bearing seat 221 affecting the normal operation of the motor 20.

[0233] Therefore, according to the embodiment of the present application, the bearing seat 221 of the motor 20 has a strong structural strength, which can prevent the motor 20 from failing during operation.

[0234] Referring to Figure 19, in some embodiments of the present application, the wire passing holes 2201 include multiple wire passing holes 2201, and the multiple wire passing holes 2201 are separated by reinforcing ribs 222; specifically, the multiple wire passing holes 2201 of the plate portion 2211 can reduce the structural strength of the bearing seat 221. Therefore, the multiple wire passing holes 2201 can be separated by the reinforcing ribs 222, and the parts between the multiple wire passing holes 2201 can be reinforced by the reinforcing ribs 222 to avoid the multiple wire passing holes 2201 weakening the structural strength of the bearing seat 221.

[0235] Further, referring to Figure 19, in some embodiments of the present application, multiple wire holes 2201 surround the mounting port, and the reinforcing ribs 222 include multiple first radial ribs 2221 extending radially along the mounting port. The first radial ribs 2221 are provided on the first side surface, and the multiple wire holes 2201 are separated by the first radial ribs 2221; specifically, the multiple wire holes 2201 are arranged around the axis of the mounting port. Since the provision of the multiple wire holes 2201 reduces the structural strength of the bearing seat 221, a multiple first radial ribs 2221 may be provided on the first side surface, and the multiple wire holes 2201 are separated by the multiple first radial ribs 2221, thereby improving the structural strength of the area on the bearing seat 221 having multiple wire holes 2201, and improving the structural strength of the bearing seat 221 along the radial direction of the mounting port, thereby avoiding failure of the motor 20 and improving the reliability of the motor 20.

[0236] In addition, in some specific examples, a first radial rib 2221 may be provided between two adjacent wire holes 2201 among the multiple wire holes 2201, and the two adjacent wire holes 2201 are separated by the first radial rib 2221 to improve the structural strength of the portion of the bearing seat 221 having the multiple wire holes 2201 and improve the reliability of the motor 20.

[0237] Referring to Figure 19, in some embodiments of the present application, the reinforcing rib 222 includes a plurality of first annular ribs 2222 arranged on the first side and surrounding the mounting port, and the first annular rib 2222 is provided with a plurality of positioning holes; this facilitates assembly and improves the structural strength of the bearing seat 221, thereby improving the reliability of the motor 20.

[0238] Specifically, the bearing seat 221 can be used in the motor 20. It can be understood that in the bearing seat 221, the first side surface of the plate portion 2211 is provided with a first annular rib 2222, and the first annular rib 2222 is provided with a plurality of positioning holes. The structural parts in the motor 20 can be installed on the bearing seat 221 through the plurality of positioning holes to facilitate the assembly of the motor 20; and the plurality of positioning holes are provided on the first annular rib 2222. In this way, the structural strength of the positioning hole area on the plate portion 2211 can be improved through the first annular rib 2222, thereby improving the structural strength of the bearing seat 221 and improving the working reliability of the motor 20.

[0239] In addition, the motor 20 can be used in HVAC equipment. It can be understood that the motor 20 can be assembled in the HVAC equipment through several positioning holes of the bearing seat 221 to facilitate the assembly of the HVAC equipment; similarly, the structural strength of the positioning hole part on the plate part 2211 is improved by the first annular member to ensure that the HVAC equipment can work normally.

[0240] Referring to Figure 19, in some embodiments of the present application, several first annular ribs 2222 include a first rib 2231, and the first rib 2231 is arranged on the outer periphery of the plate portion 2211, wherein the first rib 2231 is provided with several first positioning holes 2241 along the direction surrounding the mounting opening; or, the first rib 2231 is provided with a first positioning protrusion 2242 that protrudes from the first rib 2231 along the normal direction of the plate portion 2211; in this way, the first positioning holes 2241 and the first positioning protrusion 2242 can facilitate the assembly of the motor 20 on the HVAC equipment.

[0241] There are many ways to assemble the motor 20 on the HVAC equipment; for example, assembly is achieved through the first positioning hole 2241; for example, assembly is achieved through the first positioning protrusion 2242; for example, assembly is achieved through the first positioning hole 2241 and the first positioning protrusion 2242.

[0242] Optionally, the HVAC equipment may include a body, the bearing seat 221 is assembled in the motor 20, and the motor 20 can be assembled in the HVAC equipment through the first positioning hole 2241 and the first positioning protrusion 2242 on the bearing seat 221; wherein, the motor 20 can be directly installed on the body of the HVAC equipment through the first positioning hole 2241, and can also be indirectly installed on the body of the HVAC equipment through a structural support such as a bracket; specifically, the HVAC equipment is provided with a bracket, and the motor 20 is supported and connected to the body through the bracket, and the bracket is provided with a first mounting protrusion 2242. The mounting grooves are provided with a plurality of first connection holes 4121. The first mounting grooves correspond to the first positioning protrusions 2242, and the plurality of first connection holes 4121 correspond one-to-one with the plurality of first positioning holes 2241. During assembly, the motor 20 can first be pre-positioned by inserting the first positioning protrusions 2242 into the first mounting grooves on the bracket. The first positioning holes 2241 are then aligned with the first connection holes 4121 on the bracket, and fasteners are respectively inserted through the first positioning holes 2241 and the first connection holes 4121 to assemble the motor 20 to the machine body. Furthermore, the plurality of first positioning holes 2241 are provided on the first ribs 2231. The first ribs 2231 enhance the structural strength of the area of ​​the bearing seat 221 where the first positioning holes 2241 are located, thereby improving the operational reliability of the motor 20.

[0243] Referring to Figure 19, in some embodiments of the present application, several first annular ribs 2222 also include second ribs 2232, and the second ribs 2232 are arranged on the radial inner side of the first ribs 2231, wherein the second ribs 2232 are provided with several second positioning holes 2243 along the direction around the mounting opening; or, the outer ring 2272 of the second ribs 2232 is provided with several second positioning protrusions 2244; in this way, the second positioning holes 2243 and the second positioning protrusions 2244 can facilitate the assembly of the motor 20 on the HVAC equipment.

[0244] Specifically, the HVAC equipment may include an airflow driving member, which is arranged in the body, and the motor 20 can be connected to the airflow driving member to provide working power for the airflow driving member, and the motor 20 is connected to an electric control box, and the operation of the fan assembly 100 can be controlled by the electric control box; wherein, a second mounting groove and a plurality of second connecting holes 4121 are provided on the electric control box, the second mounting groove corresponds to the second positioning protrusion 2244, and the plurality of second connecting holes 4121 correspond one-to-one to the plurality of second positioning holes 2243; during assembly, the box body of the electric control box can be covered on the outer ring 2272 of the second rib 2232, and the electric control box can be adjusted by the second rib 2232 The box body is limited, and a second mounting groove is provided on the box body. The second positioning protrusion 2244 can be embedded in the second mounting groove to realize the pre-positioning of the electric control box body, and then the second positioning hole 2243 is matched with the second connecting hole 4121 on the electric control box body, and fasteners are respectively passed through the second positioning hole 2243 and the second connecting hole 4121 to assemble the electric control box on the motor 20; in addition, several second positioning holes 2243 are provided on the second rib 2232, and the second rib 2232 can improve the structural strength of the area where the second positioning holes 2243 are provided on the bearing seat 221, so as to improve the working reliability of the motor 20.

[0245] In addition, the second rib 2232 is disposed radially inward of the first rib 2231 . The cooperation between the first rib 2231 and the second rib 2232 can improve the structural strength of the bearing seat 221 , thereby improving the reliability of the motor 20 .

[0246] Referring to Figure 19, in some embodiments of the present application, several first annular ribs 2222 also include a third rib 2233, which is arranged on the radial inner side of the second rib 2232, wherein the inner circumferential surface of the third rib 2233 is provided with an annular groove 2245, and the third rib 2233 is not closed along the direction around the mounting opening and constructs a second notch 2248; such a setting can facilitate the circuit board 2261 to be arranged on the second side surface of the plate portion 2211 to achieve normal operation of the motor 20.

[0247] In combination with the above-mentioned embodiment, in the motor 20, a circuit board 2261 may be provided on the first side surface of the bearing seat 221, and the circuit board 2261 may be located on the radial inner side of the third rib 2233. At this time, a cover shell 227 may be provided on the first side surface, and the cover shell 227 may cooperate with the third rib 2233 to cover the circuit board 2261, thereby protecting the circuit board 2261; wherein, a latching protrusion 2275 is provided on the outer peripheral surface of the cover shell 227, and the latching protrusion 2275 can be engaged with the annular groove 2245 of the third rib 2233, thereby fixing the cover shell 227 on the bearing seat 221.

[0248] In addition, the circuit board 2261 can be connected to a power cord, which can be led out through the second notch 2248 on the third rib 2233 for connection to an external power source, thereby facilitating normal operation of the motor 20. Furthermore, a third notch 2277 is provided on the outer circumference of the cover 227. When the cover 227 is covered on the first side surface, the second notch 2248 and the third notch 2277 form a clearance structure, through which the power cord can be led out, thereby facilitating connection of the motor 20 to an external power source.

[0249] Referring to Figure 19, in some embodiments of the present application, several first annular ribs 2222 also include a fourth rib 2234, which extends along the periphery of the mounting opening; wherein, the fourth rib 2234 is provided with several bosses 2246 along the direction around the mounting opening, and at least one boss 2246 is provided with a third positioning hole 2247; in this way, the structural strength of the bearing seat 221 can be improved by the fourth rib 2234, thereby improving the reliability of the motor 20.

[0250] Specifically, in combination with the aforementioned embodiment, in the bearing seat 221, a circuit board 2261 may be provided on the first side surface of the plate portion 2211, and a third connecting hole 4121 may be provided on the circuit board 2261. The third connecting hole 4121 may correspond to the third positioning hole 2247, and fasteners are respectively passed through the third connecting hole 4121 and the third positioning hole 2247 to install the circuit board 2261 on the first side surface of the plate portion 2211; further, a plurality of bosses 2246 may be provided on the plate portion 2211, and the third positioning hole 2247 may be provided on at least one of the plurality of bosses 2246 to increase the depth of the third positioning hole 2247, thereby improving the connection strength between the circuit board 2261 and the plate portion 2211; further, the boss 2246 includes a plurality of bosses provided on the fourth rib 2234, and the structural strength of the bearing seat 221 is improved through the fourth rib 2234, the structural strength of the area where the third positioning hole 2247 is provided on the bearing seat 221 is improved, and the reliability of the motor 20 is improved.

[0251] 19 , in some embodiments of the present application, several wire passing holes 2201 are located outside the fourth rib 2234 and adjacent to the fourth rib 2234; specifically, in combination with the aforementioned embodiment, the third positioning hole 2247 is used for the installation of the circuit board 2261 in the outer rotor, and the wire passing holes 2201 are used for the passage of the wiring harness 2262 between the circuit board 2261 and the stator assembly 22. Therefore, in the bearing seat 221, several wire passing holes 2201 are located between the third rib 2233 and the fourth rib 2234, and are closer to the fourth rib 2234 relative to the third rib 2233. In other words, the wire passing holes 2201 can be arranged closer to the circuit board 2261, which facilitates the connection of the wiring harness 2262 led out from the stator assembly 22 to the circuit board 2261, thereby improving assembly efficiency. Furthermore, providing the fourth rib 2234 on the plate portion 2211 can improve the structural strength of the region where the plurality of wire holes 2201 are located in the plate portion 2211 , thereby improving the structural strength of the bearing seat 221 and thereby improving the reliability of the motor 20 .

[0252] Referring to Figure 19, in another embodiment of the present application, the third positioning hole 2247 is radially opposite to the area between two adjacent wire holes 2201; in other words, in the radial direction of the mounting port, the third positioning hole 2247 and the wire holes 2201 are staggered, so that the third positioning hole 2247 and the wire holes 2201 avoid each other, which facilitates the assembly of the circuit board 2261 on the bearing seat 221 through the third positioning hole 2247, and facilitates the electrical connection of the stator assembly 22 with the circuit board 2261 through the wire holes 2201, thereby improving the reliability of assembly.

[0253] Referring to Figure 19, in another embodiment of the present application, the second notch 2248 is radially opposite to the area between two adjacent third positioning holes 2247; combined with the above embodiment, the circuit board 2261 can be assembled on the bearing seat 221 through the third positioning hole 2247. In other words, the second notch 2248 is radially opposite to the circuit board 2261 at the mounting port, so that the power cord connected to the circuit board 2261 can be conveniently led out through the second notch 2248 to be connected to the power supply.

[0254] Referring to Figure 19, in some embodiments of the present application, the first side surface of the plate portion 2211 is also provided with a plurality of first radial ribs 2221 extending radially along the mounting opening, and the first radial ribs 2221 are connected to the boss 2246 of the fourth rib 2234, and connect at least a portion of the plurality of first annular ribs 2222; in this way, the structural strength of the bearing seat 221 can be improved, thereby improving the reliability of the motor 20.

[0255] In detail, the first side surface of the plate portion 2211 is provided with a first radial rib 2221, and the first radial rib 2221 extends radially along the mounting opening to improve the structural strength of the bearing seat 221 in the radial direction of the mounting opening. In combination with the aforementioned embodiment, the fourth rib 2234 extends around the periphery of the mounting opening, and a number of bosses 2246 are provided on the fourth rib 2234 along the direction around the mounting opening. In other words, a number of first radial ribs 2221 are arranged along the direction around the mounting opening, and can be respectively connected one-to-one with a number of bosses 2246, and at least a portion of a number of first annular members are connected together, so that the reinforcing ribs 222 on the first side surface of the plate portion 2211 form a mesh structure to improve the structural strength of the bearing seat 221, thereby improving the reliability of the motor 20.

[0256] In addition, in some specific examples, a plurality of first radial ribs 2221 are respectively connected to a plurality of bosses 2246 in a one-to-one correspondence, and the third rib 2233 is connected to the second rib 2232 to improve the structural strength of the bearing seat 221.

[0257] Referring to Figure 19, in some embodiments of the present application, the wire passing hole 2201 is arranged between two adjacent first annular ribs 2222; specifically, since the setting of the wire passing hole 2201 will cause the structural strength of the plate portion 2211 to be reduced, the wire passing hole 2201 can be arranged between two adjacent first annular ribs 2222. The first annular rib 2222 can improve the bending and tensile strength of the plate portion 2211, and reduce the stress concentration at the wire passing hole 2201, so as to improve the structural strength of the bearing seat 221, thereby improving the reliability of the motor 20.

[0258] 5 , in some embodiments of the present application, a plurality of wire holes 2201 are arranged along a circumferential direction around the mounting opening, and the inner ring 2271 and the outer ring 2272 of the sleeve portion 2212 are the same size; this facilitates the electrical connection between the stator assembly 22 and the circuit board 2261, thereby achieving normal operation of the motor 20.

[0259] In detail, in the projection in the axial direction of the mounting opening, several wire-passing holes 2201 are arranged around the circumferential direction of the mounting opening, and several wire-passing holes 2201 are set on the outer periphery of the fourth rib 2234. In other words, the inner circle 2271 of several wire-passing holes 2201 is the outer periphery of the fourth rib 2234, and the outer periphery of the sleeve portion 2212 is the outer circle 2272 of the sleeve portion 2212; it can be understood that the stator assembly 22 includes a stator component and a pin 2251, the pin 2251 is electrically connected to the stator component, and the pin 2251 can pass through the wire-passing hole 2201 to be electrically connected to the circuit board 2261; that is, the stator assembly 22 can be sleeved on the outside of the sleeve portion 2212. At this time, the pin 2251 in the stator assembly 22 can be opposite to the wire-passing hole 2201, which is convenient for the pin 2251 to pass through it, thereby improving assembly efficiency.

[0260] Among them, the stator component may include a stator winding 2253 and a stator core 2254.

[0261] 20 , in some embodiments of the present application, the reinforcing ribs 222 further include a plurality of second annular ribs 2224 disposed on the second side surface and surrounding the mounting opening to improve the structural strength of the bearing seat 221 , thereby improving the reliability of the motor 20 .

[0262] Referring to Figure 20, in some embodiments of the present application, several second annular ribs 2224 include a fifth rib 2235, and several wire holes 2201 are located on the inner side of the fifth rib 2235 and adjacent to the fifth rib 2235; specifically, the structural strength of the area where the several wire holes 2201 exist in the plate portion 2211 is improved by the fifth rib 2235, so as to improve the structural strength of the bearing seat 221, thereby improving the reliability of the motor 20.

[0263] In addition, the stator assembly 22 also includes a pin 2251 fixing part, which can be respectively sleeved on the outside of the sleeve portion 2212 and the inside of the stator component. The pin 2251 fixing part can be used to fix the pin 2251 to improve the connection strength between the stator component and the circuit board 2261, and the pin 2251 fixing part can be sleeved in the fifth rib 2235. The pin 2251 fixing part is limited by the fifth rib 2235 to improve the structural strength of the motor 20. In some specific examples, the pin 2251 fixing member has a plurality of bosses 2246, and the plurality of bosses 2246 have through holes that pass through the pin 2251 fixing member. The plurality of bosses 2246 can respectively correspond to the wire holes 2201, and at least a portion can be passed through the wire holes 2201, and the pin 2251 can be passed through the through hole. In other words, the pin 2251 is fixed by the pin 2251 fixing member, and the pin 2251 can pass through the wire hole 2201 to improve the connection strength between the stator component and the circuit board 2261.

[0264] Referring to Figure 20, in some embodiments of the present application, several second annular ribs 2224 also include a sixth rib 2236, which is arranged radially outward of the fifth rib 2235; specifically, the structural strength of the plate portion 2211 is improved by the sixth rib 2236 to improve the structural strength of the bearing seat 221, thereby improving the reliability of the motor 20.

[0265] In addition, the rotor assembly 21 also includes a shell, magnetic tiles and magnetic tile fixings. The magnetic tiles are relatively fixed on the shell. The magnetic tile fixings can be set on the shell and used to fix the magnetic tiles on the shell. When the motor 20 is assembled, the sixth rib 2236 can cooperate with the magnetic tile fixings to form a labyrinth seal to improve the sealing performance of the motor 20, prevent impurities from the external environment from entering the interior of the motor 20 and affecting the normal operation of the motor 20, and can also prevent the lubricating oil in the motor 20 from evaporating or leaking to ensure the normal operation of the motor 20.

[0266] Referring to Figure 20, in some embodiments of the present application, the reinforcing rib 222 also includes a plurality of second radial ribs 2223 extending radially along the mounting opening. The second radial ribs 2223 are arranged on the second side surface and are respectively connected to the plurality of second annular ribs 2224 and at least two of the sleeve portions 2212; so as to improve the structural strength of the bearing seat 221, thereby improving the reliability of the motor 20.

[0267] In detail, the second side surface of the plate portion 2211 is provided with a second radial rib 2223, which extends radially along the mounting opening to improve the structural strength of the bearing seat 221 along the radial direction of the mounting opening. The second radial rib 2223 can be respectively connected to a plurality of second annular ribs 2224 and at least two of the sleeve portions 2212, so that the reinforcing ribs 222 on the second side surface of the plate portion 2211 form a mesh structure to improve the structural strength of the bearing seat 221, thereby improving the reliability of the motor 20.

[0268] 20 , in some embodiments of the present application, a groove 2202 is provided on the outer circumferential surface of the sleeve portion 2212, and the groove 2202 extends along the axis of the mounting port, and is used to cooperate with the stator assembly 22 for circumferential positioning; specifically, a positioning structure is provided on the stator assembly 22, and this positioning structure can be a flat key or a protrusion constructed by the stator assembly 22 itself; during assembly, the stator assembly 22 is sleeved on the outside of the sleeve portion 2212 of the bearing seat 221, and at this time the positioning structure can be embedded in the groove 2202, so that the stator assembly 22 and the bearing seat 221 are relatively fixed in the circumferential direction, so as to facilitate the normal operation of the motor 20.

[0269] According to the motor 20 in the embodiment of the present application, the motor 20 may include a stator assembly 22 , the bearing seat 221 in the above embodiment, and a rotor assembly 21 .

[0270] Among them, the bearing seat 221 is relatively fixed to the stator assembly 22, and the rotor assembly 21 is rotatably connected to the bearing seat 221. By applying the aforementioned bearing seat 221, the failure of the motor 20 caused by the strength problem of the bearing seat 221 is avoided, the reliability of the motor 20 is improved, and the normal operation of the motor 20 is guaranteed.

[0271] The stator assembly 22 may include a stator component, a pin 2251, and a pin 2251 retainer. The pin 2251 is electrically connected to the stator component. The pin 2251 retainer is mounted on the stator component and is used to secure the pin 2251. During assembly, the stator component can be sleeved onto the outside of the sleeve portion 2212. The pin 2251 can extend through the wire hole 2201 to the first side of the plate portion 2211 to electrically connect with the circuit board 2261 on the first side. The rotor assembly 21 may include a housing, magnetic tiles, and a magnetic tile retainer. The magnetic tiles are mounted on the housing. The magnetic tile retainer is mounted on the housing and is used to secure the magnetic tiles. The housing also has a rotating shaft that can be sleeved within the sleeve portion 2212.

[0272] Specifically, in the bearing seat 221, the first side surface of the plate portion 2211 is provided with a plurality of first annular ribs 2222 and a plurality of first radial ribs 2221. The plurality of first annular ribs 2222 include a first convex rib 2231, a second convex rib 2232, a third convex rib 2233, and a fourth convex rib 2234. The first radial ribs 2221 connect at least a portion of the plurality of first annular ribs 2222, forming a mesh-like structure of the reinforcing ribs 222 on the first side surface of the plate portion 2211, thereby enhancing the structural strength of the bearing seat 221. The plate portion 2211 also has a mounting opening and a plurality of wire holes 2201. The mounting opening is used to mount the bearing on the bearing seat 221, and the wire holes 2201 are used to pass wire harnesses 2262, facilitating electrical connection between the stator assembly 22 and the circuit board 2261. The plurality of wire holes 2201 are separated by the first radial ribs 2221, reinforcing the area between the plurality of wire holes 2201 and improving the structural strength of the bearing seat 221.

[0273] In addition, a first rib 2231, a second rib 2232, a third rib 2233, and a fourth rib 2234 are sequentially arranged from the outer periphery to the center of the plate portion 2211. The first rib 2231 is provided with a plurality of first positioning holes 2241, which can be used to connect to the body of the HVAC equipment to install the motor 20 therein. The first rib 2231 reinforces the area of ​​the plate portion 2211 where the first positioning holes 2241 are located, thereby improving the reliability of the motor 20. The second rib 2232 is provided with a plurality of second positioning holes 2243, which can be used to install an electrical control box, thereby controlling the motor 20 and, therefore, the operation of the airflow drive element connected to the motor 20. The second rib 2232 reinforces the area of ​​the plate portion 2211 where the second positioning holes 2243 are located, thereby improving the reliability of the motor 20. An annular groove 2245 is provided on the inner circumference of the third rib 2233, and the annular groove 2245 can be used to assemble with the cover 227 of the circuit board 2261. Specifically, a locking protrusion 2275 is provided on the outer circumference of the cover 227, and the locking protrusion 2275 can be engaged with the annular groove 2245 of the third rib 2233, so as to fix the cover 227 on the bearing seat 221, and limit the cover 227 by the third rib 2233, thereby improving the installation strength of the cover 227 on the bearing seat 221. In addition, the third rib 2233 is constructed with a second notch 2248, and the second notch 2248 can be used to lead out the power cord connected to the circuit board 2261, so as to realize the connection between the motor 20 and the power supply. A plurality of third positioning holes 2247 are provided on the fourth rib 2234, and the plurality of third positioning holes 2247 can be used for the installation of the circuit board 2261, and the third positioning holes 2247 are arranged on at least one of the plurality of bosses 2246. The depth of the third positioning holes 2247 can be increased by the bosses 2246, thereby improving the installation strength of the circuit board 2261 on the bearing seat 221.

[0274] Furthermore, the plurality of wire-passing holes 2201 are located on the outside of the fourth rib 2234 and adjacent to the fourth rib 2234. In other words, the plurality of wire-passing holes 2201 are arranged closer to the fourth rib 2234 than the third rib 2233, so as to be closer to the third positioning hole 2247. The third positioning hole 2247 is used for assembling the circuit board 2261, and the plurality of wire-passing holes 2201 are close to the third positioning hole 2247, which can facilitate the electrical connection between the stator assembly 22 and the circuit board 2261 through the pin 2251, and the fourth rib 2234 can improve the structural strength of the area where the plurality of wire-passing holes 2201 are present in the plate portion 2211, so as to improve the structural strength of the bearing seat 221. Strength; in addition, the third positioning hole 2247 is radially opposite to the area between the two adjacent wire holes 2201, so that in the radial direction of the installation port, the third positioning hole 2247 and the wire hole 2201 are staggered, that is, the third positioning hole 2247 and the wire hole 2201 avoid each other, which is convenient for the circuit board 2261 to be assembled on the bearing seat 221; in addition, the second notch 2248 is radially opposite to the area between the two adjacent third positioning holes 2247. In other words, the circuit board 2261 can be opposite to the second notch 2248 in the radial direction of the installation port, so as to facilitate the power cord connected to the circuit board 2261 to be led out through the second notch 2248 to be connected to the power supply.

[0275] In addition, a plurality of second annular ribs 2224 and a plurality of second radial ribs 2223 are provided on the second side surface of the plate portion 2211. The second radial ribs 2223 can connect the plurality of second annular ribs 2224 and at least two of the sleeve portion 2212, so that the reinforcing ribs 222 on the second side surface of the plate portion 2211 form a mesh structure to improve the structural strength of the bearing seat 221; and the plurality of wire holes 2201 are located on the inner side of the fifth convex rib 2235 and are adjacent to the fifth convex rib 2235. In this way, the structural strength of the area where the plurality of wire holes 2201 are located in the plate portion 2211 can be improved by the fifth convex rib 2235 to improve the structural strength of the bearing seat 221; in addition, when the motor 20 is assembled, the pin 2251 fixing part in the stator assembly 22 can be sleeved on the inner side of the fifth convex rib 2235, and the pin 2251 fixing part can be limited by the fifth convex rib 2235 to improve the structural strength of the motor 20. The sixth rib 2236 is arranged radially outside the fifth rib 2235 to improve the structural strength of the bearing seat 221, and the sixth rib 2236 can cooperate with the magnetic tile fixing part on the rotor assembly 21 to form a labyrinth seal, thereby improving the sealing performance of the motor 20.

[0276] 25, during assembly, the circuit board 2261 is set on the first side surface of the plate portion 2211 through the third positioning hole 2247, the pin 2251 fixing piece can be sleeved on the stator component, and the pin 2251 on the stator component can be fixed by the pin 2251 fixing piece, the stator component is sleeved on the outside of the sleeve portion 2212 of the bearing seat 221, and the pin 2251 can be electrically connected to the circuit board 2261 on the first side through the wire hole 2201, and the fifth rib 2235 can limit the pin 2251 fixing piece to improve assembly reliability; the sixth rib 2236 can cooperate with the fixing frame on the rotor assembly 21 to form a labyrinth seal, thereby improving the sealing performance of the outer rotor motor 20 (not shown in the drawings); the card convex 2275 on the outer circumference of the cover 227 and the inner third rib 2233 The annular groove 2245 on the circumference is engaged and matched, so that the cover shell 227 can be covered outside the circuit board 2261, and the second notch 2248 of the third rib 2233 and the third notch 2277 of the cover shell 227 can form a corresponding yield structure, so that the power cord connected to the circuit board 2261 can be led out from the yield structure, which is convenient for connection to the power supply; the inner circumference of the electric control box body and the outer circumference of the second rib 2232 are limited by the cooperation, and the assembly of the electric control box on the bearing seat 221 is realized through the second positioning hole 2243; a plurality of first positioning holes 2241 are provided on the first rib 2231, and the motor 20 can be installed on the bracket of the HVAC equipment through the first positioning holes 2241, and the part of the plate part 2211 with the first positioning holes 2241 is increased through the first rib 2231 to improve the reliability of the motor 20.

[0277] The present application also provides a mounting bracket 40 for a fan assembly 100. In combination with Figures 28 to 36, the mounting bracket 40 includes a first mounting plate 41, a second mounting plate 42, a stacking plate 43 and a support leg 44, wherein the second mounting plate 42 and the first mounting plate 41 are alternately arranged, and the second mounting plate 42 is used to connect the power supply to it and be installed thereon, the stacking plate 43 is arranged on the first mounting plate 41, stacked with the first mounting plate 41 and connected to each other, the stacking plate 43 has a socket 431 and a flange 432, the flange 432 surrounds the socket 431, and the support leg 44 is connected and fixed to the second mounting plate 42, and the end 4401 of the support leg 44 is inserted into the socket 431 and connected to the flange 432.

[0278] The fan assembly 100 can be quickly and conveniently installed into the complete product (hereinafter the complete product takes the air treatment device 1000 as an example) through the mounting bracket 40. The first mounting plate 41, the second mounting plate 42 and the support leg 44 constitute the basic frame structure of the mounting bracket 40. After the fan assembly 100 is connected to the second mounting plate 42, the support of the fan assembly 100 is achieved. On this basis, by setting the stacking plate 43, the structural strength between the support leg 44 and the first mounting plate 41 is strengthened to prevent the first mounting plate 41 from being deformed under the weight of the fan assembly 100, and by optimizing the structure of the stacking plate 43, the connection strength between the end 4401 of the support leg 44 and the stacking plate 43 is improved, thereby greatly improving the installation stability and operation stability of the fan assembly 100 and ensuring the operation efficiency of the fan assembly 100.

[0279] Specifically, the first mounting plate 41 can be made of a variety of materials. In this embodiment, the first mounting plate 41 is made of metal, for example, the first mounting plate 41 is a sheet metal part. The first mounting plate 41 is used to connect to the target area (not shown in the figure) to fix the entire mounting bracket 40. Similar to the first mounting plate 41, the second mounting plate 42 can also be a sheet metal part. The second mounting plate 42 needs to be arranged alternately with the first mounting plate 41, that is, the second mounting plate 42 is a certain distance away from the first mounting plate 41. The fan assembly 100 is connected to the second mounting plate 42. There are many ways to connect the fan assembly 100 to the second mounting plate 42, as long as the fan assembly 100 can be fixed to the second mounting plate 42. The fan assembly 100 has an impeller 10. After the fan assembly 100 is connected to the second mounting plate 42, the fan assembly 100 is located between the first mounting plate 41 and the second mounting plate 42. The first mounting plate 41 has a first ventilation hole 4111. The air inlet 101 of the impeller 10 corresponds to the first ventilation hole 4111. When the fan assembly 100 is running, the impeller 10 rotates to form a negative pressure, thereby sucking in airflow. The airflow passes through the first ventilation hole 4111 and enters the impeller 10 through the air inlet 101, and is then thrown out by the impeller 10.

[0280] The relative fixation between the first mounting plate 41 and the second mounting plate 42 is achieved by support legs 44. The support legs 44 are respectively connected to the first mounting plate 41 and the second mounting plate 42 (the connection can be direct or indirect), thereby achieving the relative fixation between the first mounting plate 41 and the second mounting plate 42. The support legs 44 are located outside the fan assembly 100, that is, the first mounting plate 41, the second mounting plate 42 and the support legs 44 enclose a certain space to accommodate the fan assembly 100. The connection between the support legs 44 and the second mounting plate 42 can be referred to the connection scheme in the relevant art, while the connection between the support legs 44 and the first mounting plate 41 is achieved by stacking plates 43.

[0281] The stacking plate 43 is a plate-like structure, for example, the stacking plate 43 is also a sheet metal part. The size of the stacking plate 43 is much smaller than the first mounting plate 41. The stacking plate 43 is stacked on the first mounting plate 41, and the stacking plate 43 and the first mounting plate 41 are connected and fixed to each other. The connection between the support legs 44 and the first mounting plate 41 is realized through the stacking plate 43. Since the stacking plate 43 and the first mounting plate 41 form a stacked structure (at least two layers), it is beneficial to improve the structural strength. When the weight of the fan assembly 100 is applied to the stacking plate 43 and the first mounting plate 41 through the support legs 44, the stacking plate 43 and the first mounting plate 41 are not easy to deform, and are not easy to shake when the first mounting plate 41 is connected to the target area.

[0282] On this basis, the stacking plate 43 is provided with an insertion hole 431 and a flange 432. The flange 432 surrounds the insertion hole 431. The end 4401 of the support leg 44 is inserted into the insertion hole 431. In this way, the insertion hole 431 forms a preliminary limit for the end 4401 of the support leg 44. It can be understood that when the end 4401 of the support leg 44 is inserted into the insertion hole 431, it is simultaneously surrounded by the flange 432. In other words, along the insertion direction of the end 4401 of the support leg 44, the end 4401 of the support leg 44 and the flange 432 have a certain overlap, which strengthens the mutual restraint effect. Based on this, the flange 432 is connected and fixed to the end 4401 of the support leg 44, which effectively enhances the stability of the connection between the stacking plate 43 and the end 4401 of the support leg 44.

[0283] The fan assembly 100 is mounted on the mounting bracket 40 to form the fan assembly 100. The fan assembly 100 needs to be installed in the cabinet 300 of the air handling device 1000. The cabinet 300 is provided with a target area. The first mounting plate 41 is connected to the target area to fix the fan assembly 100 in the cabinet 300. When the fan assembly 100 is in operation, it drives the airflow to flow in the cabinet 300 and be transported out. In this embodiment, by providing the stacked plates 43 and optimizing the structure of the stacked plates 43, the structural strength of the first mounting plate 41 is improved, and the connection of the end 4401 of the support leg 44 is also more stable. This greatly improves the stability of the entire mounting bracket 40. When the fan assembly 100 is in operation, it is less likely to cause vibration of the mounting bracket 40 or even the cabinet 300. The fan assembly 100 operates more smoothly, which is conducive to ensuring the efficiency of the fan assembly 100.

[0284] To ensure effective connection between the end 4401 of the support leg 44 and the flange 432 while reducing connection difficulty, in some embodiments of the present application, the end 4401 of the support leg 44 and the flange 432 are secured to each other by welding. When the end 4401 of the support leg 44 is inserted into the insertion hole 431, it is surrounded by the flange 432. Welding can quickly and easily secure the end 4401 of the support leg 44 to the flange 432, providing easy operation and a secure connection.

[0285] During the welding process between the flange 432 and the end 4401 of the support leg 44, the laminate 43 is susceptible to welding deformation due to the uneven temperature field. The presence of welding deformation affects the structural strength and overall accuracy of the mounting bracket 40. Therefore, in some embodiments of the present application, the laminate 43 is provided with a third folded edge 434 around its perimeter. The so-called third folded edge 434 is formed by bending the same structural member. The provision of the third folded edge 434 can effectively improve the structural strength of the laminate 43 and is less likely to cause welding deformation when the laminate 43 is subjected to an uneven temperature field. For example, the laminate 43 may have third folded edges 434 on both adjacent sides of its perimeter. This can maximize the structural strength of the laminate 43 while limiting the number of third folded edges 434.

[0286] It can be understood that the connection and fixation between the flange 432 and the end 4401 of the support leg 44 needs to be carried out after the end 4401 of the support leg 44 is inserted into the socket 431. It can be understood that the connection and fixation between the flange 432 and the end 4401 of the support leg 44 have corresponding positions. If there is a deviation in the connection position between the flange 432 and the end 4401 of the support leg 44, it will affect the accuracy of the fan assembly 100 installed on the mounting bracket 40. To this end, the end 4401 of the support leg 44 is simultaneously abutted against the first mounting plate 41 when it is inserted into the socket 431. In this way, the end 4401 of the support leg 44 can no longer be inserted along the socket 431 and is blocked by the first mounting plate 41 and positioned. In this way, the relative position between the flange 432 and the end 4401 of the support leg 44 is ensured, thereby ensuring the accuracy of the subsequent fan assembly 100 installed on the mounting bracket 40.

[0287] In some embodiments of the present application, the stacking plate 43 and the first mounting plate 41 are connected and fixed to each other through a threaded connection, that is, the mounting bracket 40 includes a first screw 461, which passes through the stacking plate 43 and the first mounting plate 41, so that the stacking plate 43 and the first mounting plate 41 are connected and fixed to each other.

[0288] Specifically, the first mounting plate 41 has a first mounting hole 4112, and the corresponding stacking plate 43 has a third mounting hole 433. After the stacking plates 43 are stacked (stacked means superimposed on each other) on the first mounting plate 41, the first screw 461 passes through the third mounting hole 433 and the first mounting hole 4112 in sequence to achieve mutual fixation between the stacking plate 43 and the first mounting plate 41. Of course, the first screw 461 can also pass through the first mounting hole 4112 and the third mounting hole 433 in sequence to achieve mutual fixation between the stacking plate 43 and the first mounting plate 41. It can be understood that, during the process of connecting the stacking plate 43 to the first mounting plate 41 through the threaded connection, the position of the stacking plate 43 relative to the first mounting plate 41 can be slightly adjusted, which can lead to slight adjustments in the positions of the support legs 44, the second mounting plate 42 and the fan assembly 100. Through such a setting, it is ensured that the fan assembly 100 is adjusted to a suitable position so that the air inlet 101 of the fan assembly 100 corresponds to the first ventilation hole 4111, thereby avoiding air flow loss and increased noise, and ensuring the efficiency of the fan assembly 100.

[0289] Furthermore, in some embodiments of the present application, first screws 461 are respectively provided on opposite sides of the socket 431. For example, first screws 461 are respectively provided on symmetrical sides of the socket 431. This effectively improves the connection stability between the stacking plate 43 and the first mounting plate 41, and the stacking plate 43 is not easily warped relative to the first mounting plate 41.

[0290] For example, third mounting holes 433 are respectively provided on opposite sides of the socket 431, and first mounting holes 4112 corresponding one-to-one to the third mounting holes 433 are provided on the first mounting plate 41, and the first screws 461 correspond one-to-one to the third mounting holes 433. In this way, the connection and fixation between the stacking plate 43 and the first mounting plate 41 can be achieved on opposite sides of the socket 431, thereby improving the connection stability between the stacking plate 43 and the first mounting plate 41.

[0291] In some embodiments of the present application, there are multiple stacked plates 43, where "multiple" means two or more. The multiple stacked plates 43 are arranged alternately along the circumference of the first mounting plate 41, and the minimum distance between the stacked plates 43 and the edge of the first mounting plate 41 is designed to be no greater than 5 mm. This arrangement fully utilizes the space occupied by the first mounting plate 41, allowing the space enclosed by the first mounting plate 41, the second mounting plate 42, and the support legs 44 to accommodate a larger fan assembly 100.

[0292] Specifically, since the support legs 44 need to be inserted into the insertion holes 431 of the stacking plates 43, when multiple stacking plates 43 are included, there are correspondingly multiple end portions 4401 of the support legs 44. For example, if there are four stacking plates 43, the support legs 44 and the stacking plates 43 cooperate to form four support points distributed along a ring. The multiple stacking plates 43 are distributed along the ring, that is, the multiple stacking plates 43 are connected in series to form a roughly annular shape, which helps improve the stability of the mounting bracket 40. Furthermore, the minimum distance between the stacking plates 43 and the edge of the first mounting plate 41 is designed to be no greater than 5 mm. That is, the stacking plates 43 are located within the range enclosed by the edge of the first mounting plate 41 and are as close to the edge of the first mounting plate 41 as possible. As mentioned above, the first mounting plate 41, the second mounting plate 42, and the support legs 44 enclose a certain space to accommodate the fan assembly 100. By placing the stacking plates 43 as close as possible to the edge of the first mounting plate 41, the space occupied by the first mounting plate 41 is fully utilized, making the space enclosed by the first mounting plate 41, the second mounting plate 42, and the support legs 44 as large as possible, thereby accommodating a larger fan assembly 100. In particular, the minimum distance between the stacking plates 43 and the edge of the first mounting plate 41 is designed to be 0 mm. The so-called 0 mm means that the stacking plates 43 are moved from the center of the first mounting plate 41 toward the edge of the first mounting plate 41 until the stacking plates 43 just contact the edge of the first mounting plate 41, so that the stacking plates 43 are flush with the edge of the first mounting plate 41, thereby maximizing the utilization of the space occupied by the first mounting plate 41.

[0293] In some embodiments of the present application, the first mounting plate 41 includes a first panel 411 and a first folded edge 412, the first folded edge 412 is arranged around the first panel 411, the first ventilation hole 4111 is arranged on the first panel 411, and the stacking plate 43 is stacked and connected to the first panel 411, and the first folded edge 412 is suitable for connecting to the target area, thereby achieving the fixation of the mounting bracket 40.

[0294] Specifically, the first panel 411 is flat as a whole, and a first ventilation hole 4111 is opened approximately in the middle of the first panel 411, and the stacking plate 43 is arranged around the first ventilation hole 4111 and is stacked and connected with the first panel 411, that is, the first mounting hole 4112 is set on the first panel 411, and the support leg 44 can abut against the first panel 411 when inserted into the socket 431. In this embodiment, the structural strength of the first mounting plate 41 is enhanced by the setting of the first folding edge 412.

[0295] As mentioned above, the fan assembly 100, consisting of the mounting bracket 40 and the fan assembly 100, is installed in the cabinet 300 of the air handling device 1000. The fan assembly 100 is fixed by connecting the first mounting plate 41 to the target area of ​​the cabinet 300. The connection between the first mounting plate 41 and the target area of ​​the cabinet 300 is achieved by the first folded edge 412. That is, the first folded edge 412 is connected to the target area of ​​the cabinet 300. In this way, the first folded edge 412 can improve the structural strength of the first mounting plate 41 and also facilitate the connection and fixation between the first mounting plate 41 and the target area of ​​the cabinet 300.

[0296] It can be understood that, in the above description, the stacked plate 43 is flush with the edge of the first mounting plate 41 , that is, the third folded edge 434 of the stacked plate 43 is flush with the first folded edge 412 of the first mounting plate 41 .

[0297] There are various options for connecting the first folded edge 412 to the target area of ​​the cabinet 300. For example, the first folded edge 412 is provided with a connection hole 4121, and the target area of ​​the cabinet 300 is provided with a hole structure. In this way, the first folded edge 412 can be fixed to the target area of ​​the cabinet 300 by passing a fourth screw (not shown) through the connection hole 4121 and the hole structure on the target area of ​​the cabinet 300. Furthermore, the connection hole 4121 can be designed to be elongated. When the fan assembly 100 is installed in the cabinet 300, the elongated connection hole 4121 is more easily aligned with the hole structure on the target area of ​​the cabinet 300, thereby making it easier to pass the fourth screw.

[0298] In some embodiments of the present application, after the first fold edge 412 is connected to the target area, the first fold edge 412 is subjected to a large force. To this end, a rib portion 4122 is provided on the first fold edge 412, for example, the rib portion 4122 is formed by stamping on the first fold edge 412. This can enhance the structural strength of the first fold edge 412 and prevent the first fold edge 412 from deformation.

[0299] In some embodiments of the present application, the first panel 411 is provided with first folded edges 412 on opposite sides along a first direction, and the first folded edges 412 are provided with connection holes 4121. The first panel 411 is provided with first folded edges 412 on opposite sides along a second direction perpendicular to the first direction, but the first folded edges 412 are not provided with connection holes 4121. For example, the first panel 411 is rectangular, and two of the opposite first folded edges 412 of the first panel 411 are provided with connection holes 4121, while the other two opposite first folded edges 412 of the first panel 411 are not provided with connection holes 4121. In this way, the fan assembly 100 can be installed by providing the first folded edges 412 with connection holes 4121, and the number of connection holes 4121 to be processed can be reduced, thereby improving production efficiency.

[0300] For example, the cabinet body 300 includes a U-shaped plate 481 and a side plate 482. Target areas are respectively provided on opposite sides of the U-shaped plate 481, and the target areas are provided with a hole structure. The fan assembly 100 is installed in the U-shaped plate 481, and the first folded edge 412 provided with a connecting hole 4121 is respectively connected to the target areas on opposite sides of the U-shaped plate 481 through a fourth screw. Finally, the side plate 482 is installed on the U-shaped plate 481. In this way, the fan assembly 100 can be installed on the cabinet body 300. There is no need to set connecting holes 4121 on the first folded edge 412. The number of screwing times is also reduced during the later assembly, which is conducive to improving production efficiency.

[0301] In some embodiments of the present application, the periphery of the first mounting plate 41 has a first corner portion 4123 , and the stacked plates 43 are disposed at the first corner portion 4123 and are stacked and connected to the first corner portion 4123 .

[0302] Specifically, as mentioned above, generally speaking, the cross-section of the cabinet body 300 is rectangular, so the first mounting plate 41 needs to adapt to the cross-section of the cabinet body 300, and the first mounting plate 41 is also designed to be roughly rectangular, so that the periphery of the first mounting plate 41 has four first corner portions 4123, and the stacking plate 43 is set at the first corner portion 4123, so that the stacking plate 43 is as close to the edge of the first mounting plate 41 as possible, making full use of the space occupied by the first mounting plate 41, and the first corner portion 4123 is prone to collision and deformation relative to other positions around the first mounting plate 41, and setting the stacking plate 43 at the first corner portion 4123 is also beneficial to prevent the first corner portion 4123 from being bumped and deformed.

[0303] In some embodiments of the present application, the first corner portion 4123 is provided with a fourth notch 4124, for example, the opposite sides of the fourth notch 4124 are respectively the first folded edges 412, the stacked plate 43 has a third corner portion 435, and the third corner portion 435 is provided with a fifth notch 4351, for example, the opposite sides of the fifth notch 4351 are respectively the third folded edges 434. When the stacked plate 43 is set to the first corner portion 4123, the fourth notch 4124 is connected to the fifth notch 4351, for example, the outline of the fourth notch 4124 overlaps with the outline of the fifth notch 4351. In this way, when the fan assembly 100 is installed in the cabinet body 300, it can be clamped on the beam of the cabinet body 300 (not shown in the figure) through the fourth notch 4124 and the fifth notch 4351 to achieve positioning installation.

[0304] In some embodiments of the present application, the support leg 44 includes a first support segment 441, a second support segment 442 and a third support segment 443. The first support segment 441 is arranged between the third support segment 443 and the second support segment 442. The first support segment 441 is connected and fixed to the second mounting plate 42, and the second support segment 442 forms an end 4401 of the support leg 44. The third support segment 443 also forms an end 4401 of the support leg 44. Through such an arrangement, the number of support legs 44 can be reduced and the assembly efficiency can be improved.

[0305] For example, there are two supporting legs 44, one of which forms two ends 4401 through its second supporting segment 442 and the third supporting segment 443, and the other supporting leg 44 forms two ends 4401 through its second supporting segment 442 and the third supporting segment 443, and a support point is formed between the end 4401 of the supporting leg 44 and the stacked plate 43. In this way, four support points can be formed by the two supporting legs 44, thereby achieving effective support while simplifying the structure.

[0306] There are many ways to connect and fix the first support section 441 and the second mounting plate 42. For example, the first support section 441 and the second mounting plate 42 are fixed to each other by welding. Welding can quickly and easily connect and fix the first support section 441 and the second mounting plate 42, which is easy to operate and has a stable connection.

[0307] Furthermore, the first support section 441 is welded to the side of the second mounting plate 42 facing away from the first mounting plate 41. Since the fan assembly 100 needs to be installed on the second mounting plate 42, and the fan assembly 100 needs to be located between the first mounting plate 41 and the second mounting plate 42, the first support section 441 is welded to the side of the second mounting plate 42 facing away from the first mounting plate 41, so as to avoid interference between the first support section 441 and the installation of the fan assembly 100.

[0308] In some embodiments of the present application, the second mounting plate 42 includes a second panel 421 and a second folded edge 422. The second folded edge 422 is arranged around the second panel 421. The first support section 441 is welded to the intersection of the second panel 421 and the second folded edge 422 to improve the stability of the welding.

[0309] Specifically, the second panel 421 is flat as a whole, and the fan assembly 100 is specifically connected to the second panel 421. For example, a second mounting hole 4211 is provided on the second panel 421, and a corresponding hole structure is provided on the fan assembly 100. The fan assembly 100 is mounted on the second mounting plate 42 by penetrating the second mounting hole 4211 and the hole structure on the fan assembly 100 with a second screw 462. The second folded edge 422 is provided around the periphery of the second panel 421, so that a certain sandwich cavity is formed between the second folded edge 422 and the second panel 421. The first support section 441 is provided between the second folded edge 422 and the second panel 421. This can increase the contact area between the first support section 441 and the second mounting plate 42, and can effectively improve the connection strength between the second support section 442 and the second mounting plate 42 during welding.

[0310] In some embodiments of the present application, the support leg 44 further includes a bent section 444. The bent section 444 is provided between the first support section 441 and the second support section 442, and between the first support section 441 and the third support section 443. That is, the first support section 441 and the second support section 442 are connected by the bent section 444, and the first support section 441 and the third support section 443 are also connected by the bent section 444. For example, the support leg 44 is integrally formed and bent. The provision of the bent section 444 reduces stress concentration that may cause the support leg 44 to break, and also prevents the support leg 44 from deforming under the weight of the fan assembly 100, thereby improving the structural stability of the entire mounting bracket 40. In particular, the bent section 444 extends from the first support section 441 toward one side of the first support section 441 and away from the second mounting plate 42. This allows the support leg 44 to avoid the fan assembly 100, thereby maximizing space utilization.

[0311] In some embodiments of the present application, the second mounting plate 42 is provided with a foolproof hole 4212 for inserting the positioning post 471 of the fan assembly 100. The fan assembly 100 is installed on the second mounting plate 42. For example, the second mounting plate 42 is provided with a second mounting hole 4211, and the fan assembly 100 is provided with a hole structure. The second screw 462 passes through the second mounting hole 4211 and the hole structure of the fan assembly 100 to achieve mutual connection. By providing the foolproof hole 4212, the position of the fan assembly 100 installed on the second mounting plate 42 can be restricted to prevent the fan assembly 100 from being installed incorrectly.

[0312] The second aspect of the present application discloses a fan assembly 100, which includes the above-mentioned mounting bracket 40 and the fan assembly 100, and the fan assembly 100 is connected to the second mounting plate 42 of the mounting bracket 40, and the mounting bracket 40 includes a first mounting plate 41, a second mounting plate 42, a stacking plate 43 and a support leg 44, wherein the mounting bracket 40 includes a first mounting plate 41, a second mounting plate 42, a stacking plate 43 and a support leg 44, wherein the second mounting plate 42 is arranged alternately with the first mounting plate 41, and the second mounting plate 42 is used for the fan assembly 100 to be connected and installed thereon, the stacking plate 43 is arranged on the first mounting plate 41, stacked with the first mounting plate 41 and connected to each other, the stacking plate 43 has a socket 431 and a flange 432, the flange 432 surrounds the socket 431, and the support leg 44 is fixedly connected to the second mounting plate 42, and the end 4401 of the support leg 44 is inserted into the socket 431 and connected to the flange 432.

[0313] The fan assembly 100 can be quickly and conveniently installed into the complete product through the mounting bracket 40. The first mounting plate 41, the second mounting plate 42, and the support legs 44 form the basic frame structure of the mounting bracket 40. After the fan assembly 100 is connected to the second mounting plate 42, the fan assembly 100 is supported. On this basis, the stacking plate 43 is provided to strengthen the structural strength between the support legs 44 and the first mounting plate 41, preventing the first mounting plate 41 from deforming under the weight of the fan assembly 100. The structure of the stacking plate 43 is optimized to improve the connection strength between the end 4401 of the support leg 44 and the stacking plate 43. This greatly improves the installation stability and operating stability of the fan assembly 100, ensuring the operating efficiency of the fan assembly 100. It can be understood that the mounting bracket 40 of the fan assembly 100 of this embodiment adopts the technical solution of the above-mentioned embodiment, and therefore has at least the beneficial effects brought by the technical solution of the above-mentioned embodiment, which will not be repeated here.

[0314] In some embodiments of the present application, the fan assembly 100 further includes an air guide ring 45, which is connected to the first mounting plate 41. For example, the first mounting plate 41 is provided with a fourth mounting hole 4113, and the air guide ring 45 has a corresponding hole structure. The air guide ring 45 is fixed to the first mounting plate 41 by a third screw 463 that penetrates the fourth mounting hole 4113 and the hole structure on the air guide ring 45. Specifically, the air guide ring 45 needs to penetrate the first ventilation hole 4111 and extend into the air inlet 101 of the fan assembly 100. That is, along the axial direction of the air guide ring 45, the air outlet end 452 of the air guide ring 45 overlaps with the air inlet 101 to a certain extent. This guides the airflow into the fan assembly 100, prevents air leakage, reduces airflow loss, and ensures the efficiency of the fan assembly 100. In addition, the air guide ring 45 can be designed to taper along the direction of the airflow, so that the air guide ring 45 can better guide the airflow and reduce airflow resistance.

[0315] In some embodiments of the present application, the air guide ring 45 needs to cooperate with the edge gap of the air inlet 101 of the fan assembly 100 along its radial direction, that is, along the radial direction of the air guide ring 45, there is a certain gap between the air outlet end 452 of the air guide ring 45 and the edge of the air inlet 101 of the fan assembly 100. Since the fan assembly 100 has a certain vibration during operation, the gap is set to avoid interference between the fan assembly 100 and the air guide ring 45.

[0316] In some embodiments of the present application, the diameter of the air inlet end 451 of the air guide ring 45 is designed to be larger than the diameter of the first ventilation hole 4111, so that when the air guide ring 45 passes through the first ventilation hole 4111, the air inlet end 451 of the air guide ring 45 will be stuck on the side of the first mounting plate 41 away from the second mounting plate 42, and the air inlet end 451 of the air guide ring 45 covers the gap between the air guide ring 45 and the first ventilation hole 4111, preventing airflow from leaking from the gap between the air guide ring 45 and the first ventilation hole 4111.

[0317] The fan assembly 100 of the present application also includes a guide ring, an electronic control component, a guide fence 30 and a mounting bracket 40. The impeller 10 is connected to the motor 20 through a flange, the motor 20 is connected to the electronic control component through the bearing seat 221, the electronic control component is connected to the mounting bracket 40, and the guide ring and the guide fence 30 are installed on the mounting bracket 40.

[0318] The second aspect of the present application discloses an air treatment device 1000, which includes a cabinet 300 and the above-mentioned fan assembly 100. The fan assembly 100 is arranged in the cabinet 300, so as to drive the air flow. For example, the air flow flows from bottom to top through the fan assembly 100 as shown in the figure. The cabinet 300 is provided with a target area (not shown in the figure), and the first mounting plate 41 is connected to the target area to fix the fan assembly 100 to the cabinet 300. For example, the target area is provided with a hole structure, and the fourth screw is passed through the hole structure on the target area and the connection hole 4121 on the first folded edge 412 of the first mounting plate 41 to realize the fixation of the mounting bracket 40, thereby realizing the fixation of the fan assembly 100.

[0319] In addition, as shown in Figures 38 to 40 , an air handling device 1000 includes the aforementioned impeller 10 or fan assembly 100. Air handling device 1000 heats or cools airflow through heat exchanger 200, and then delivers the airflow to the duct system via the impeller 10 or fan assembly 100 of the aforementioned embodiment. A comparative embodiment in which the second plate portion 112 of the first end plate 11 of the impeller 10 has a straight cross-section passing through the axis of the impeller 10 is used as a comparison embodiment. Compared to the impeller 10 described in the embodiment of the present application, at the same airflow rate, the impeller 10 described in the present application has an aerodynamic efficiency of 62.5%, while the impeller 10 of the comparative embodiment has an aerodynamic efficiency of 61.2%.

[0320] According to the air treatment device 1000 in the embodiment of the present application, by applying the aforementioned impeller 10 or fan assembly 100, efficient air flow transmission can be achieved, good ventilation effect can be provided, indoor temperature can be adjusted, and noise level can be controlled at the same time.

[0321] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0322] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0323] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0324] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 application. In this specification, the schematic representations of the above terms do 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. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0325] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A fan assembly comprising a motor and an impeller, wherein the motor is connected to the impeller, and the impeller comprises: a first end plate, a second end plate, and a plurality of blades spaced apart along the circumference of the impeller, the second end plate being provided with an air inlet, the second end plate and the first end plate being spaced apart along the air inlet direction of the impeller; the blades connecting the first end plate and the second end plate, the first end plate comprising a first plate portion and a second plate portion arranged around the periphery of the first plate portion, Wherein, the second plate portion extends obliquely in the direction of the air intake in a direction away from the axis of the impeller; or, the radial dimension of the rotating structure formed by the inner edges and / or outer peripheries of the multiple blades changes along the axis of the impeller; or, the outer diameter of the first end plate is smaller than the outer diameter of the second end plate.

2. The fan assembly according to claim 1, wherein: The second plate portion extends obliquely in the air intake direction in a direction away from the axis of the impeller, and a cross section of the second plate portion passing through the axis of the impeller is non-linear.

3. The fan assembly according to claim 2, wherein: The cross section is divided into at least two sections in the radial direction, and the at least two sections include a first section close to the impeller axis and a second section away from the impeller axis. The angle a1 between the first section and the impeller axis is greater than the angle a2 between the second section and the impeller axis.

4. The fan assembly according to claim 3, wherein: The angle between at least one of the at least two sections and the impeller axis gradually decreases in the direction away from the impeller axis; or, the angle between at least one of the at least two sections and the impeller axis remains unchanged in the direction away from the impeller axis; or, at least one of the at least two sections is in a straight line shape; or, at least one of the at least two sections is in a smooth arc shape, and the angle between the at least two sections and the impeller axis gradually decreases in the direction away from the impeller axis; or, two adjacent sections of the at least two sections transition smoothly; or, the at least two sections transition smoothly to the first plate portion.

5. The fan assembly according to any one of claims 2 to 4, wherein: In the direction away from the impeller axis, the angle a between the cross section and the impeller axis gradually decreases; Alternatively, the cross section is a smooth curve; Or, the included angle a between the second plate portion and the impeller axis is configured to be 30°≤a≤90°; Alternatively, the radial span L of the second plate portion and the outer diameter D1 of the second end plate satisfy 10%≤L / D1≤25%; Alternatively, the radial span L of the second plate portion and the outer diameter D1 of the second end plate satisfy 14%≤L / D1≤18%; Or, the outer diameter D2 of the first end plate and the outer diameter D1 of the second end plate satisfy 50%≤D2 / D1≤100%; Alternatively, the outer diameter D2 of the first end plate and the outer diameter D1 of the second end plate satisfy 60%≤D2 / D1≤70%.

6. The fan assembly according to any one of claims 1 to 5, wherein: The motor includes a stator assembly and a rotor assembly. The rotor assembly is rotatably sleeved on the stator assembly. The rotor assembly includes a rotor housing. The rotor housing is inserted into the impeller along the axis of the impeller.

7. The fan assembly according to claim 6, wherein: The axial depth H1 of the rotor housing inserted into the impeller satisfies H1 / H0≤H2 / H0*6%*(D2 / D1)^2, H0 is the axial dimension of the rotor housing, H2 is the axial distance between the air inlet and the first end plate, D1 is the radial dimension of the rotor housing, and D2 is the average value of the sum of the radial dimension of the air inlet and the radial dimension of the first plate portion.

8. The fan assembly according to claim 7, wherein: The axial depth H1 of the rotor housing inserted into the impeller satisfies H1 / H0≤H2 / H0*4.5%*(D2 / D1)^2.

9. The fan assembly according to claim 7 or 8, wherein: The fan assembly also includes a first bearing and a second bearing. The rotor assembly includes a rotor shaft, which is passed through the first bearing and the second bearing. The first bearing is closer to the air inlet than the second bearing, satisfying H3 / H0≤H1 / H0, where H3 is the axial distance between the first bearing and the end face of the rotor housing.

10. The fan assembly according to claim 9, wherein: Satisfy 1.2*H3 / H0≤H1 / H0; Alternatively, the impeller and the rotor assembly constitute a rotating component, the center of gravity of the rotating component is located between the rotor housing and the air inlet, and the axial distance between the center of gravity of the rotating component and the first bearing is 0 to 40 mm.

11. The fan assembly according to any one of claims 6 to 10, wherein: A lug is provided on the circumferential surface of the rotor housing, and the lug abuts against and is connected to the first plate portion.

12. The fan assembly according to any one of claims 1 to 11, wherein: The fan assembly also includes a guide fence, which is opposite to the impeller along the axis of the impeller. The guide fence includes multiple ring fences and multiple first straightening bars. The multiple ring fences and the multiple first straightening bars are connected into a grid shape. The multiple first straightening bars are distributed around the center of the guide fence and are evenly distributed or unevenly distributed along the circumference of the guide fence.

13. The fan assembly according to claim 12, wherein: The guide fence has a first guide part and a second guide part. The turbulence or flow rate of the airflow to the first guide part is higher than that of the second guide part. The distribution density of the first straightening strips of the first guide part is higher than that of the second guide part.

14. The fan assembly according to claim 13, wherein: Within the same angular range along the circumference of the guide grid, a ratio of the number N1 of the first straightening bars in the first guide portion to the number N2 of the first straightening bars in the second guide portion satisfies: 1.1≤N1 / N2≤40.

15. The fan assembly according to any one of claims 12 to 14, wherein: The guide grid has a first guide portion and a second guide portion along the circumferential direction, and the distribution density of the first straightening strips in the first guide portion and the second guide portion is different. In which, the first guide portion is respectively provided with the second guide portion on both sides of the circumference of the guide fence; or, the first guide portion and the second guide portion are alternately distributed in the circumference of the guide fence; or, the first guide portion is configured as a sector with an angular arc α greater than 0° and not greater than 120°; or, the first guide portion is configured as a sector with an angular arc α not less than 30° and not greater than 90°; or, the second guide portion is configured as a sector with an angular arc β greater than 0° and not greater than 120°; or, the second guide portion is configured as a sector with an angular arc β greater than 0° and not greater than 90°.

16. The fan assembly according to any one of claims 12 to 15, wherein: The multiple ring grids include a first ring grid located at the innermost side, and a second rectifying bar is provided on the inner side of the first ring grid, wherein the second rectifying bar on the inner side of the first ring grid is concave in the axial direction; or, the first rectifying bar on the outer side of the first ring grid is convex in the axial direction; or, the number of the second rectifying bars on the inner side of the first ring grid is not greater than the number of the first rectifying bars on the outer side of the first ring grid.

17. The fan assembly according to any one of claims 12 to 16, wherein: The guide fence has a first guide portion and a second guide portion, and the fan assembly satisfies the heat exchanger arranged relatively along the axial direction of the guide fence, the distance between the first guide portion and the heat exchanger is greater than the distance between the second guide portion and the heat exchanger, and the distribution density of the first straightening strips of the first guide portion is higher than the distribution density of the first straightening strips of the second guide portion.

18. The fan assembly according to any one of claims 1 to 17, wherein: The motor includes a stator assembly and a rotor assembly. The stator assembly includes a bearing seat and an iron core component. The iron core component is installed on the bearing seat. The bearing seat has a plurality of wire holes.

19. The fan assembly according to claim 18, wherein: The bearing seat comprises: a plate portion having a first side surface and a second side surface opposite to each other, and a mounting opening and a plurality of wire holes passing through the first side surface and the second side surface; a sleeve portion connected to the plate portion, opposite to the mounting opening and extending along the axis of the mounting opening; Wherein, the first side surface and / or the second side surface is provided with reinforcing ribs, and the reinforcing ribs are arranged around the installation opening.

20. The fan assembly of claim 19, wherein: The wire-passing holes include a plurality of wire-passing holes, and the plurality of wire-passing holes surround the mounting opening. The reinforcing ribs include a plurality of first radial ribs extending radially along the mounting opening, and the first radial ribs are arranged on the first side surface. The plurality of wire-passing holes are separated by the first radial ribs.

21. The fan assembly according to any one of claims 19-20, wherein: The reinforcing ribs include a plurality of first annular ribs provided on the first side surface and surrounding the mounting opening, and the first annular ribs are provided with a plurality of positioning holes.

22. The fan assembly of claim 21, wherein: The plurality of first annular ribs include a first convex rib, which is arranged on the outer periphery of the plate portion, wherein the first convex rib is provided with a plurality of first positioning holes; or, the first convex rib is provided with a first positioning protrusion protruding from the first convex rib along the normal direction of the plate portion.

23. The fan assembly of claim 22, wherein: The plurality of first annular ribs further include a second convex rib, which is arranged radially inward of the first convex rib, wherein the second convex rib is provided with a plurality of second positioning holes; or, the outer ring of the second convex rib is provided with a plurality of second positioning protrusions.

24. The fan assembly of claim 23, wherein: The plurality of first annular ribs further include a third convex rib, which is arranged radially inward of the second convex rib, wherein an annular groove is provided on the inner circumference of the third convex rib, and the third convex rib is not closed and forms a second notch.

25. The fan assembly of claim 24, wherein: The plurality of first annular ribs further include a fourth convex rib, which extends along the periphery of the mounting opening; wherein the fourth convex rib is provided with a plurality of bosses, and at least one of the bosses is provided with a third positioning hole.

26. The fan assembly of claim 25, wherein: The first side surface of the plate portion is further provided with a plurality of first radial ribs extending radially along the mounting opening. The first radial ribs are connected to the boss of the fourth convex rib and connect at least a portion of the plurality of first annular ribs.

27. The fan assembly according to any one of claims 19 to 26, wherein: The reinforcing ribs further include a plurality of second annular ribs arranged on the second side surface and surrounding the mounting opening.

28. The fan assembly of claim 27, wherein: The plurality of second annular ribs include a fifth convex rib, the plurality of wire holes are located inside and adjacent to the fifth convex rib; the plurality of second annular ribs also include a sixth convex rib, the sixth convex rib is located radially outside the fifth convex rib; Alternatively, the reinforcing ribs further include a plurality of second radial ribs extending radially along the mounting opening, wherein the second radial ribs are provided on the second side surface and are respectively connected to the plurality of second annular ribs and at least two of the sleeve portions.

29. The fan assembly according to any one of claims 19 to 28, wherein: The stator assembly further includes: A power cord assembly, wherein the power cord assembly and the iron core assembly are respectively arranged on opposite sides of the plate portion, and the lead wire structure of the iron core assembly passes through the wire hole and is electrically connected to the power cord assembly.

30. The fan assembly of claim 29, wherein: The stator assembly further includes a cover shell, which covers the bearing seat. The power cord assembly includes a circuit board, which is arranged in the cover shell, and a wiring harness of the power cord assembly extends from the cover shell.

31. The fan assembly of claim 30, wherein: The first side surface of the plate portion is provided with a third rib, and the third rib is assembled with the peripheral edge of the opening of the cover shell.

32. The fan assembly of claim 31, wherein: The inner circumference of the third rib is provided with an annular groove, the outer circumference of the cover shell is provided with a snap-on protrusion, and the snap-on protrusion is snap-connected to the annular groove; and / or, the plurality of wire holes are provided on the plate portion and are located on the inner side of the third rib; and / or, the core assembly is interference fit with the sleeve portion; and / or, the first side surface of the plate portion is provided with a radial rib, the peripheral wall of the cover shell has a first notch, and the radial rib is passed through the first notch.

33. A fan assembly according to claim 31 or 32, wherein: The third rib is not closed to construct a second notch for leading out the wiring harness of the power cord assembly; or, the peripheral wall of the cover shell has a third notch for leading out the wiring harness of the power cord assembly; or, the third rib is not closed to construct a second notch, the peripheral wall of the cover shell has a third notch, and the cover shell has positioning ribs on opposite sides of the third notch along the circumferential direction, and the positioning ribs are arranged on the inner side of the second notch.

34. The fan assembly according to any one of claims 29 to 33, wherein: The core assembly has a pin, which passes through the wire hole and is electrically connected to the power cord assembly. The stator assembly also includes a pin fixing plate, at least a portion of which passes through the wire hole, and the pin passes through the pin fixing plate and is electrically connected to the power cord assembly.

35. The fan assembly according to any one of claims 1 to 34, wherein: The fan assembly further includes a mounting bracket, the mounting bracket including: a first mounting plate; a second mounting plate, the first mounting plate and the first mounting plate are arranged alternately, and the second mounting plate is connected to the motor; a stacked plate, stacked and connected to the first mounting plate, the stacked plate having an insertion hole and a flange surrounding the insertion hole; and A supporting leg is connected to the second mounting plate, and an end of the supporting leg is inserted into the insertion hole to be connected to the flange.

36. The fan assembly of claim 35, wherein: The end of the support leg is welded and fixed to the flange; and / or the periphery of the stacking plate has a third folding edge; and / or the end of the support leg abuts against the first mounting plate; and / or the stacking plate includes a plurality of stacking plates, and the plurality of stacking plates are arranged alternately along the circumference of the first mounting plate, and the minimum distance between the stacking plate and the edge of the first mounting plate is not greater than 5 mm.

37. A fan assembly according to claim 35 or 36, wherein: The first mounting plate includes a first panel and a first folded edge provided around the first panel, the stacked plate is stacked and connected to the first panel, and the first folded edge is suitable for connecting with the target area to fix the mounting bracket. Wherein, the first folded edge has a connecting hole, and the first folded edge is suitable for being connected to the target area through the connecting hole; and / or, the first folded edge is provided with a rib portion.

38. The fan assembly of claim 37, wherein: The first folded edges on opposite sides of the first panel along the first direction are provided with connecting holes, and the first folded edges on opposite sides of the first panel along the second direction are not provided with the connecting holes. The first direction and the second direction are perpendicular to each other, and the first folded edges are suitable for connecting to the target area through the connecting holes.

39. An air treatment device, wherein: It comprises a cabinet and the fan assembly according to any one of claims 1 to 38, wherein the fan assembly is arranged in the cabinet.

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