Outer rotor fan assembly and air treatment device
By designing the gap between the installation plate and the impeller hub and alternate shading and exposure structure in the outer rotor fan assembly, the problem of heat dissipation obstacles of the fan is solved, better heat dissipation effect and miniaturization of the device are achieved, and fan performance is improved.
Patent Information
- Application Number
- CN202420347829.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-02-23
AI Technical Summary
In the prior art, the mounting bracket of the outer rotor fan assembly can easily hinder the heat dissipation of the fan and affect the working performance of the fan.
By designing a preset distance between the first mounting plate and the impeller hub, a gap is formed so that the heat of the motor is dissipated, combined with an alternate shading and exposure design to enhance the heat dissipation effect, and a mixed flow air wheel is used to improve air handling efficiency.
It effectively avoids the accumulation of motor heat, improves the working performance of the fan, and takes into account the miniaturization and reliability of the device.
Smart Images
Figure CN222228911U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of fan installation, and in particular to an outer rotor fan assembly and an air handling device. Background Art
[0002] An air handling device houses an external rotor fan assembly, which includes a mounting bracket and a fan mounted on the bracket. The fan generates heat during operation, which must be dissipated promptly to prevent it from affecting its performance. In related art, the mounting bracket can often hinder the fan's heat dissipation, necessitating improvements. Utility Model Content
[0003] The present application aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the present application proposes an outer rotor fan assembly.
[0004] To achieve the above objectives, the present application discloses an outer rotor fan assembly, the outer rotor fan assembly comprising:
[0005] A mounting bracket comprising a first mounting plate; and
[0006] A fan includes a motor and a rotor; the motor includes a stator assembly and a rotor, the rotor rotatably mounted on the stator assembly, and the stator assembly is connected to the first mounting plate; the rotor includes blades and a blade hub, the blade hub being mounted on the rotor to rotate with the rotor, and the blades being mounted on the blade hub; along the axial direction of the rotor, the blade hub and the first mounting plate are alternately disposed, and a predetermined distance is provided between the edge of the blade hub and the first mounting plate.
[0007] In some embodiments of the present application, along the axial direction of the wind wheel, the distance between the edge of the wind blade hub and the first mounting plate is H1, and the axial dimension of the wind blade hub is H2, satisfying 5%≤H1 / H2≤30%.
[0008] In some embodiments of the present application, 10%≤H1 / H2≤20% is satisfied.
[0009] In some embodiments of the present application, when projected along the axial direction of the wind wheel, the projection of the first mounting plate covers the projection of the motor.
[0010] In some embodiments of the present application, the first mounting plate alternately covers and exposes the peripheral portion of the fan blade hub.
[0011] In some embodiments of the present application, along the circumference of the first mounting plate, the first mounting plate includes a plurality of corner portions arranged alternately and edge portions arranged between adjacent corner portions, the corner portions shielding the peripheral portion of the fan blade hub, and the edge portions exposing the peripheral portion of the fan blade hub.
[0012] In some embodiments of the present application, the first mounting plate is provided with a through hole, and the outer rotor fan assembly further includes an electrical control box, which is provided in the stator assembly and passes through the through hole from one side of the first mounting plate to the other side of the stator assembly.
[0013] In some embodiments of the present application, the electric control box has a connecting terminal, and along the axial direction of the wind wheel, the connecting terminal and the first mounting plate are separated by a preset distance.
[0014] In some embodiments of the present application, the minimum distance between the connecting terminal and the first mounting plate is not less than 10 mm.
[0015] In some embodiments of the present application, the wind wheel is a mixed flow wind wheel, and a cavity is formed between the fan hub and the first mounting plate.
[0016] The present application also discloses an air treatment device, which includes a cabinet and the above-mentioned outer rotor fan assembly, and the outer rotor fan assembly is arranged in the cabinet.
[0017] The technical solution of the present application is to set a preset distance between the edge of the first mounting plate and the fan blade hub, so that a gap is formed between the first mounting plate and the edge of the fan blade hub along the axial direction of the fan wheel. The heat of the motor can be dissipated through the gap, thereby avoiding heat accumulation in the motor and affecting the working performance.
[0018] Other advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other designs can be obtained based on the structures shown in these drawings without paying any creative work.
[0020] Figure 1 An exploded view of an air handling device in some embodiments;
[0021] Figure 2 A partial schematic diagram of an outer rotor fan assembly in some embodiments;
[0022] Figure 3 for Figure 2 The enlarged view marked as A in FIG;
[0023] Figure 4 for Figure 2 A cross-sectional view of the structure shown;
[0024] Figure 5 for Figure 4 The enlarged image marked B in the figure.
[0025] Description of Figure Numbers:
[0026] External rotor fan assembly 100, air handling device 200, cabinet 210, mounting bracket 1000, first mounting plate 1100, corner 1110, edge 1120, through hole 1130, second mounting plate 1200, support leg 1300, fan 2000, motor 2100, rotor 2110, stator assembly 2120, wind wheel 2200, fan blade hub 2210, cavity 2211, opening 2212, fan blade 2220, air inlet 2230, electrical control box 3000, connecting terminal 3100.
[0027] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0029] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0030] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean 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. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0031] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0032] This application proposes an outer rotor fan assembly 100, combined with Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, in some embodiments of the present application, the outer rotor fan assembly 100 includes a mounting bracket 1000 and a fan 2000, the mounting bracket 1000 includes a first mounting plate 1100, the fan 2000 is fixed to the first mounting plate 1100, the fan 2000 includes a motor 2100 and a wind wheel 2200, the motor 2100 is drivingly connected to the wind wheel 2200, the motor 2100 includes a rotor 2110 and a stator assembly 2120, and the rotor 2110 is rotatable. The moving sleeve is arranged on the stator assembly 2120, and the stator assembly 2120 is connected to the first mounting plate 1100 so that the motor 2100 is fixed on the first mounting plate 1100. The wind wheel 2200 includes a fan hub 2210 and a fan blade 2220. The fan blade 2220 is arranged on the fan hub 2210. The fan hub 2210 is arranged on the rotor 2110 and can rotate with the rotor 2110, thereby driving the entire fan wheel 2200 to rotate. Along the axial direction of the fan wheel 2200 ( Figure 1 In the vertical direction (in the vertical direction), the impeller hub 2210 and the first mounting plate 1100 are designed to be arranged alternately, and a predetermined distance is provided between the edge of the impeller hub 2210 and the first mounting plate 1100. The predetermined distance between the edge of the first mounting plate 1100 and the impeller hub 2210 creates a gap along the axial direction of the impeller 2200. Heat from the motor 2100 can be dissipated through the gap, preventing heat accumulation in the motor 2100 and affecting operating performance.
[0033] Specifically, the mounting bracket 1000 is a structure for mounting the fan 2000, and supports the fan 2000. The fan 2000 can be installed in the target area through the mounting bracket 1000. For example, taking the air treatment device 200 as an example, the air treatment device 200 includes a cabinet 210, and the outer rotor fan assembly 100 needs to be installed in the cabinet 210, that is, the outer rotor fan assembly 100 is fixed to the cabinet 210 through the mounting bracket 1000, such as the mounting bracket 1000 and the cabinet 210 are fixed with screws. Of course, other fixing methods can also be used. Since the fan 2000 is mounted on the mounting bracket 1000, the fan 2000 is fixed to the cabinet 210. When the fan 2000 is working, a negative pressure can be formed in the cabinet 210, thereby driving the air flow, such as Figure 1 In the orientation shown, the air flows from bottom to top through the outer rotor fan assembly 100 and continues to flow along the cabinet 210 to be discharged.
[0034] The mounting bracket 1000 includes a first mounting plate 1100. The fan 2000 is mounted on the mounting bracket 1000 by being mounted on the first mounting plate 1100. The specific structure of the mounting bracket 1000 has various forms, which are not limited in this application. Figure 1 and Figure 2 The structure described above provides an exemplary description of the mounting bracket 1000. The mounting bracket 1000 includes a first mounting plate 1100, a second mounting plate 1200, and a support leg 1300, wherein the first mounting plate 1100 and the second mounting plate 1200 are arranged alternately, and the support leg 1300 is respectively connected to the first mounting plate 1100 and the second mounting plate 1200, so that the first mounting plate 1100 and the second mounting plate 1200 are relatively fixed, and the fan 2000 is connected and fixed to the first mounting plate 1100, so that the fan 2000 is located in the space enclosed by the first mounting plate 1100, the second mounting plate 1200 and the support leg 1300, and the second mounting plate 1200 is provided with a ventilation hole (not shown in the figure), and the air inlet 2230 of the fan 2000 corresponds to the ventilation hole, and the mounting bracket 1000 is connected to the cabinet 210 through the second mounting plate 1200 to achieve the fixation of the mounting bracket 1000, that is, the fixation of the fan 2000 is achieved. When the fan 2000 is working, air flows through the ventilation holes and enters the fan 2000 , and is then thrown out and transported out.
[0035] The fan 2000 includes a wind wheel 2200 and a motor 2100. The wind wheel 2200 is driven and connected to the motor 2100, thereby driving the wind wheel 2200 to rotate. The driving connection between the wind wheel 2200 and the motor 2100 is specifically as follows: the motor 2100 includes a stator assembly 2120 and a rotor 2110. It can be understood that in the motor 2100, the fixed part is regarded as the stator assembly 2120, and the rotatable part is regarded as the rotor 2110. The stator assembly 2120 and the rotor 2110 are assembled together, and the rotor 2110 can rotate relative to the stator assembly 2120. Specifically, the rotor 2110 needs to be covered with the stator assembly 2120 and rotate relative to the stator assembly 2120, thus forming an outer rotor form. The wind wheel 2200 is connected to the rotor 2110, so that the rotor 2110 can drive the wind wheel 2200 to rotate. The wind wheel 2200 specifically includes a wind blade hub 2210 and wind blades 2220. There are multiple wind blades 2220. The wind blade hub 2210 supports multiple wind blades 2220. The connection between the wind wheel 2200 and the rotor 2110 is realized through the wind blade hub 2210. The wind blade hub 2210 surrounds the rotor 2110 and is connected to the rotor 2110. The connection between the wind blade hub 2210 and the rotor 2110 can be achieved through various methods such as screw connection, welding, and one-piece molding, thereby realizing the assembly of the rotor 2110 and the wind wheel 2200.
[0036] The fan 2000 is connected to the first mounting plate 1100 by connecting the stator assembly 2120 to the first mounting plate 1100. For example, the stator assembly 2120 is fixed to the first mounting plate 1100 by screwing. Since the rotor 2110 is rotatably mounted on the stator assembly 2120, and the impeller hub 2210 surrounds the rotor 2110, that is, the impeller hub 2210 is radially enlarged relative to the rotor 2110. Since the stator assembly 2120 is connected to the first mounting plate 1100, in order to prevent the first mounting plate 1100 from hindering the heat dissipation of the motor 2100, there is a gap between the edge of the impeller hub 2210 and the first mounting plate 1100 along the axial direction of the wind wheel 2200 (the extension direction of the rotation axis, as shown in FIG. 2 ). Figure 1 The upper and lower directions shown in the figure are designed to be arranged alternately, and the edge of the impeller hub 2210 is separated from the first mounting plate 1100 by a preset distance, so that a certain gap is formed between the edge of the impeller hub 2210 and the first mounting plate 1100. Through the gap, heat exchange between the motor 2100 and the outside world is achieved, which is beneficial to the heat dissipation of the motor 2100 and prevents heat accumulation in the motor 2100 and affects the performance.
[0037] It is understandable that the gap between the edge of the fan hub 2210 and the first mounting plate 1100 not only affects the heat dissipation of the motor 2100, but also affects the axial size of the outer rotor fan assembly 100 ( Figure 1 If the gap between the edge of the impeller hub 2210 and the first mounting plate 1100 is too large, the axial space occupied by the outer rotor fan assembly 100 will increase, which is not conducive to the axial miniaturization of the outer rotor fan assembly 100. Therefore, it is necessary to limit the distance between the edge of the impeller hub 2210 and the first mounting plate 1100.
[0038] Combine Figure 4 and Figure 5 As shown, in some embodiments of the present application, the distance between the edge of the impeller hub 2210 and the first mounting plate 1100 along the axial direction of the wind wheel 2200 is H1, and the axial size of the impeller hub 2210 along the wind wheel 2200 (i.e., the axial size of the impeller hub 2210) is H2, which needs to satisfy 5%≤H1 / H2≤30%, for example, H1 / H2 is 5%, 10%, 15%, 20%, 25% or 30%. It can be understood that if H1 / H2 is smaller, it means that the edge of the impeller hub 2210 is closer to the first mounting plate 1100, which is beneficial to the axial miniaturization of the outer rotor fan assembly 100 and reduces the space occupied. However, in the case of poor manufacturing or poor assembly, there will be errors, and the risk of scratches between the impeller hub 2210 and the first mounting plate 1100 is higher. In addition, when the edge of the impeller hub 2210 is closer to the first mounting plate 1100, the heat exchange between the edge of the impeller hub 2210 and the first mounting plate 1100 and the outside world is reduced, which is not conducive to the heat dissipation of the motor 2100. If H1 / H2 is larger, it means that the edge of the impeller hub 2210 is farther away from the first mounting plate 1100, which is beneficial to the heat dissipation of the motor 2100 but not conducive to the axial miniaturization of the outer rotor fan assembly 100. For this reason, by satisfying 5%≤H1 / H2≤30%, miniaturization and heat dissipation can be effectively taken into account. In particular, through a large number of experiments by the inventors, the value of H1 / H2 is designed to be 10% to 20%, which has a better overall effect, taking into account assembly deviation, heat dissipation and miniaturization design, and achieving the goals of low height, good heat dissipation and reliability.
[0039] Combine Figure 2 and Figure 5 As shown, in some embodiments of the present application, the projection of the first mounting plate 1100 covers the projection of the motor 2100 when projected along the axial direction of the wind wheel 2200. By such an arrangement, the motor 2100 can be effectively supported.
[0040] Specifically, the stator assembly 2120 of the motor 2100 is connected to the first mounting plate 1100, the wind wheel 2200 is connected to the rotor 2110, and the first mounting plate 1100 is supported on the second mounting plate 1200 through the support legs 1300. Therefore, the first mounting plate 1100 needs to bear the weight of the motor 2100 and the wind wheel 2200 while providing sufficient space to connect with the support legs 1300. To this end, in this embodiment, by covering the projection of the motor 2100 with the projection of the first mounting plate 1100, the size of the first mounting plate 1100 is relatively larger (radial size), so that there is enough space to connect the motor 2100 and the support legs 1300, for example, the motor 2100 is roughly in the middle position of the first mounting plate 1100. Since a gap is designed between the first mounting plate 1100 and the edge of the fan hub 2210, even if the size of the first mounting plate 1100 is designed to be larger, it will not affect the heat exchange between the space between the first mounting plate 1100 and the fan hub 2210 and the outside world, and at the same time, the installation of the fan 2000 can be effectively realized.
[0041] In order to further improve the heat dissipation of the motor 2100, Figure 2 and Figure 3 As shown, in some embodiments of the present application, the first mounting plate 1100 alternately shields and exposes the peripheral portion of the fan blade hub 2210 .
[0042] Specifically, the peripheral portion of the fan hub 2210 is the edge portion of the fan hub 2210. When the fan 2000 is mounted on the first mounting plate 1100, the fan 2200 is observed along the axial direction (and Figure 1 (Observed from top to bottom), the first mounting plate 1100 alternately blocks and exposes the peripheral portion of the impeller hub 2210, that is, part of the peripheral portion of the impeller hub 2210 is blocked and part is exposed, and is alternately distributed along the circumference of the impeller hub 2210. In this way, in the top-down direction, the space (cavity 2211) formed between the first mounting plate 1100 and the impeller hub 2210 has an opening 2212 that is open upward. In addition to escaping radially (the gap formed between the first mounting plate 1100 and the edge of the impeller hub 2210), the heated air can also escape directly upward through the opening 2210, thereby enhancing the heat dissipation of the motor 2100. It can be understood that the shielding and exposure of the peripheral part of the impeller hub 2210 are both achieved through the first mounting plate 1100. Part of the first mounting plate 1100 radially covers the peripheral part of the impeller hub 2210 to form shielding, and part of the first mounting plate 1100 does not radially cover the peripheral part of the impeller hub 2210 to form exposure. In this way, under the premise of effective heat dissipation, the first mounting plate 1100 has a larger radial dimension.
[0043] For example, combined with Figure 2 and Figure 3 As shown, in some embodiments of the present application, along the circumference of the first mounting plate 1100, the first mounting plate 1100 includes a plurality of corner portions 1110 and an edge portion 1120, the plurality of corner portions 1110 are arranged at intervals, and the edge portion 1120 is arranged between two adjacent corner portions 1110. After the fan 2000 is installed on the first mounting plate 1100, the corner portion 1110 radially crosses the edge of the impeller hub 2210 to achieve shielding of the peripheral portion of the impeller hub 2210, and the edge portion 1120 does not radially cross the edge of the impeller hub 2210 to achieve the route of the peripheral portion of the impeller hub 2210. Since the edge portion 1120 is arranged between adjacent corner portions 1110, that is, the edge portion 1120 and the corner portion 1110 are alternately arranged, the peripheral portion of the impeller hub 2210 is alternately arranged. Generally speaking, the first mounting plate 1100 can be designed to be in a shape similar to a rectangle, which is convenient for installing the fan 2000 and for connecting with the supporting legs 1300 .
[0044] Combine Figure 3 As shown, in some embodiments of the present application, the first mounting plate 1100 is provided with a through-hole 1130, and the outer rotor fan assembly 100 further includes an electrical control box 3000. The electrical control box 3000 is disposed on the stator assembly 2120 and extends through the through-hole 1130 from the stator assembly 2120. It is understood that the fan 2000 is mounted on one side of the first mounting plate 1100. For example, the stator assembly 2120 and one side of the first mounting plate 1100 are secured by screws, such that the fan 2000 is positioned between the first mounting plate 1100 and the second mounting plate 1200. Since the operation of the fan 2000 is controlled by the electrical control box 3000, the electrical control box 3000 is disposed on the stator assembly 2120 so as to be relatively fixed to the stator assembly 2120, thereby achieving better electrical connection between the electrical control box 3000 and the stator assembly 2120. To this end, in this embodiment, a through hole 1130 is provided on the first mounting plate 1100 so that the electrical control box 3000 can pass through the through hole 1130 and be connected to the stator assembly 2120. The electrical control box 3000 passes from one side of the first mounting plate 1100 to the other side of the first mounting plate 1100.
[0045] Further, combined Figures 2 to 5As shown, in some embodiments of the present application, the electrical control box 3000 is equipped with a connection terminal 3100, which is used to achieve electrical connection with other components. For example, the main control board is electrically connected to the electrical control box 3000 via an electrical connection line. The end of the electrical connection line is provided with a plug, and the plug and the connection terminal 3100 are plugged together. To facilitate the connection between the plug and the connection terminal 3100, the connection terminal 3100 needs to be designed to be arranged alternately with the first mounting plate 1100 along the axial direction of the wind wheel 2200. This makes it easier to plug and unplug the plug. It is understandable that, as mentioned above, the electrical control box 3000 passes through the through hole 1130 to the other side of the first mounting plate 1100, that is, the connection terminal 3100 needs to be exposed on the other side of the first mounting plate 1100.
[0046] After extensive testing, the inventors designed the minimum distance H3 between the connecting terminal 3100 and the first mounting plate 1100 to be no less than 10 mm, for example, 10 mm, 15 mm, 20 mm, or 25 mm. This ensures smooth plugging and unplugging of the plug while also preventing the electrical control box 3000 from occupying excessive axial space. It should be understood that the minimum distance H3 between the connecting terminal 3100 and the first mounting plate 1100 is defined between the upper surface of the first mounting plate 1100 and the lower end of the connecting terminal 3100.
[0047] Combine Figure 4 As shown, in some embodiments of the present application, the wind wheel 2200 is a mixed flow wind wheel 2200. The mixed flow wind wheel 2200 can make the air do centrifugal motion and axial motion, thus forming a mixed air flow. By using the mixed flow wind wheel 2200, higher efficiency can be achieved. Figure 1 In the illustrated air handling device 200, the air inlet 2230 of the mixed flow impeller 2200 is open downward. Air flows upward through the air inlet 2230 and into the mixed flow impeller 2200. Air is then ejected axially and radially by the mixed flow impeller 2200, causing the air to continue flowing upward. The use of the mixed flow impeller 2200 creates a cavity 2211 between the impeller hub 2210 and the first mounting plate 1100. Because the first mounting plate 1100 and the edge of the impeller hub 2210 are spaced a certain distance apart along the axial direction of the impeller 2200, a gap is formed between the cavity 2211 and the outside world, allowing heat to be exchanged through this gap, dissipating heat from the fan 2000.
[0048] Performance tests were conducted on the outer rotor fan assembly 100, with Schemes 2 through 6 representing the present invention's technical solutions and Schemes 1 and 7 serving as comparative solutions. Temperature tests were conducted on the enameled wire (winding wire) of the fan 2000's motor 2100, according to the "GB / T 14711-2009 Winding Temperature Determination Method." The results are shown in the table below. This demonstrates that the present invention's technical solution effectively balances assembly tolerances, heat dissipation, and miniaturization, achieving a low profile with excellent heat dissipation and reliability.
[0049] plan H1 / mm Fan 2000 axial height / mm Motor 2100 enameled wire temperature / ℃ Scheme 1, H1 / H2=3% 1.2 (higher risk of scratches) 368 55.3 Scheme 2, H1 / H2=8% 2 370 55.2 Scheme 3, H1 / H2=13% 4.5 372.5 52.5 Scheme 4, H1 / H2=18% 7 375 48.4 Scheme 5, H1 / H2=23% 9.5 377.5 47.7 Scheme 6, H1 / H2=28% 12 380 47.2 Scheme 7, H1 / H2=33% 14.5 382.5 47.1
[0050] This application also discloses an air treatment device 200, combined with Figure 1 As shown, the air handling device 200 includes a cabinet 210 and an outer rotor fan assembly 100, wherein the outer rotor fan assembly 100 is arranged in the cabinet 210, so as to drive the air flow, for example Figure 1 The airflow in the direction shown flows from bottom to top through the outer rotor fan assembly 100, the outer rotor fan assembly 100 includes a mounting bracket 1000 and a fan 2000, the mounting bracket 1000 includes a first mounting plate 1100, the fan 2000 is fixed to the first mounting plate 1100, the fan 2000 includes a motor 2100 and a wind wheel 2200, the motor 2100 is driven and connected to the wind wheel 2200, the motor 2100 includes a rotor 2110 and a stator assembly 2120, the rotor 21 10 is rotatably mounted on the stator assembly 2120, and the stator assembly 2120 is connected to the first mounting plate 1100 so that the motor 2100 is fixed on the first mounting plate 1100. The wind wheel 2200 includes a fan hub 2210 and fan blades 2220. The fan blades 2220 are arranged on the fan hub 2210. The fan hub 2210 is arranged on the rotor 2110 and can rotate with the rotor 2110, thereby driving the entire wind wheel 2200 to rotate. Along the axial direction of the wind wheel 2200 ( Figure 1 In the vertical direction), the impeller hub 2210 and the first mounting plate 1100 are designed to be arranged alternately, and the edge of the impeller hub 2210 is spaced apart from the first mounting plate 1100 by a preset distance. By setting the edge of the first mounting plate 1100 and the impeller hub 2210 at a preset distance, a gap is formed between the edge of the first mounting plate 1100 and the impeller hub 2210 along the axial direction of the wind wheel 2200. The heat of the motor 2100 can be dissipated through the gap, thereby preventing the heat of the motor 2100 from accumulating and affecting the working performance. It can be understood that the outer rotor fan assembly 100 of the air treatment device 200 adopts the technical solution of the above embodiment, and therefore has at least the beneficial effects brought about by the technical solution of the above embodiment, which will not be repeated here.
[0051] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.
Claims
1. An outer rotor fan assembly (100), characterized in that: include: A mounting bracket (1000), the mounting bracket (1000) comprising a first mounting plate (1100); as well as A fan (2000), the fan (2000) comprising a motor (2100) and a wind wheel (2200); the motor (2100) comprising a stator assembly (2120) and a rotor (2110), the rotor (2110) being rotatably sleeved on the stator assembly (2120), the stator assembly (2120) being connected to the first mounting plate (1100); the wind wheel (2200) comprising a fan blade (2220) and a fan blade hub (2 210), the fan blade hub (2210) is arranged on the rotor (2110) so as to rotate along with the rotor (2110), and the fan blade (2220) is arranged on the fan blade hub (2210); along the axial direction of the wind wheel (2200), the fan blade hub (2210) and the first mounting plate (1100) are arranged alternately, and the edge of the fan blade hub (2210) and the first mounting plate (1100) are spaced apart by a preset distance.
2. The outer rotor fan assembly (100) according to claim 1, characterized in that: Along the axial direction of the wind wheel (2200), the distance between the edge of the fan blade hub (2210) and the first mounting plate (1100) is H1, and the axial dimension of the fan blade hub (2210) is H2, satisfying 5%≤H1 / H2≤30%.
3. The outer rotor fan assembly (100) according to claim 2, characterized in that: Satisfies 10%≤H1 / H2≤20%.
4. The outer rotor fan assembly (100) according to claim 1, characterized in that: When projected along the axial direction of the wind wheel (2200), the projection of the first mounting plate (1100) covers the projection of the motor (2100).
5. The outer rotor fan assembly (100) according to claim 4, characterized in that: The first mounting plate (1100) alternately covers and exposes the peripheral portion of the fan blade hub (2210).
6. The outer rotor fan assembly (100) according to claim 5, characterized in that: Along the circumference of the first mounting plate (1100), the first mounting plate (1100) includes a plurality of alternately arranged corner portions (1110) and an edge portion (1120) arranged between adjacent corner portions (1110), wherein the corner portions (1110) shield the peripheral portion of the fan blade hub (2210), and the edge portion (1120) exposes the peripheral portion of the fan blade hub (2210).
7. The outer rotor fan assembly (100) according to claim 1, characterized in that: The first mounting plate (1100) is provided with a through hole (1130), and the outer rotor fan assembly (100) further includes an electric control box (3000), wherein the electric control box (3000) is arranged on the stator assembly (2120) and passes through the through hole (1130) from one side of the first mounting plate (1100) to the other side of the stator assembly (2120).
8. The outer rotor fan assembly (100) according to claim 7, characterized in that: The electric control box (3000) has a connection terminal (3100), and along the axial direction of the wind wheel (2200), the connection terminal (3100) and the first mounting plate (1100) are separated by a preset distance.
9. The outer rotor fan assembly (100) according to claim 8, characterized in that: The minimum distance between the connecting terminal (3100) and the first mounting plate (1100) is not less than 10 mm.
10. The outer rotor fan assembly (100) according to any one of claims 1 to 9, characterized in that: The wind wheel (2200) is a mixed flow wind wheel, and a cavity (2211) is formed between the wind blade hub (2210) and the first mounting plate (1100).
11. An air treatment device (200), characterized in that: It comprises a cabinet (210) and an outer rotor fan assembly (100) according to any one of claims 1 to 10, wherein the outer rotor fan assembly (100) is arranged in the cabinet (210).