Low-wind-noise wind wheel structure, fan assembly and dehumidifier

Abstract

The utility model relates to a low-wind-noise wind wheel structure, a fan assembly and a dehumidifier, a wind wheel comprises a support, the support comprises a hub, a mounting part and a flow guide part connected between the hub and the mounting part, the flow guide part and the mounting part are both located on the air inlet side of the wind wheel, the flow guide part is in a hollow circular truncated cone shape, and a containing cavity for at least containing part of a motor is defined by the flow guide part; the mounting part is used for mounting a driving shaft of the motor; and the inner ends of the blades are connected to the circumferential outer surface of the hub. According to the low-wind-noise wind wheel structure, the fan assembly and the dehumidifier, the flow guide part with the specific through-flow opening is arranged in the wind wheel, airflow organization in the wind wheel is optimized, airflow is more regular and smoother when entering the containing cavity and acting with the blades, and pneumatic noise is effectively reduced while the air volume is increased; meanwhile, the motor can be partially wrapped by the containing cavity formed by the flow guide part, and leakage of noise of the motor is reduced.

Description

Technical Field

[0001] This application relates to the field of dehumidifier technology, and in particular to a low-noise impeller structure, fan assembly and dehumidifier. Background Technology

[0002] In existing technologies, wind turbines, especially centrifugal or cross-flow wind turbines, are core components in various fluid machinery such as fans, air conditioners, dehumidifiers, and air purifiers. Their main function is to transport or pressurize gas through rotating blades. However, existing wind turbine and fan assemblies still face some challenges in achieving higher airflow, lower noise, and better structural performance:

[0003] Firstly, to increase airflow, one direct method is to increase the rotor speed. However, for some rotors (especially small ones), when the speed is too high, their internal "air storage capacity" or airflow capacity may be insufficient, leading to rapid airflow, turbulent airflow, and the formation of turbulence and eddies on the blade surface and within the air duct, resulting in significant aerodynamic noise. Conversely, limiting the speed or changing the blade shape to reduce noise may sacrifice airflow.

[0004] Secondly, the motors in the fan (especially external rotor motors) generate electromagnetic or mechanical noise during operation. In some traditional structures, the motors are directly exposed or lack effective acoustic barriers, causing this motor noise to propagate directly outwards, superimposing with aerodynamic noise and further worsening the overall noise performance.

[0005] Furthermore, the hub section or the connection point to the motor shaft of traditional wind turbines may have insufficient strength due to unreasonable structural design. Especially after injection molding or long-term operation, cracks, deformations, or loosening of connections are prone to occur, affecting the dynamic balance performance and service life of the wind turbine. Poor dynamic balance will further aggravate vibration and noise. Utility Model Content

[0006] To address the aforementioned issues, this application provides a low-noise impeller structure, fan assembly, and dehumidifier that achieves increased airflow and reduced noise.

[0007] To achieve the above objectives, in a first aspect, embodiments of this application provide a low-noise wind turbine structure, comprising:

[0008] The bracket includes a hub and a mounting portion, as well as a guide portion connecting the hub and the mounting portion. Both the guide portion and the mounting portion are located on the air inlet side of the wind turbine. The guide portion is a hollow frustum shape and forms a cavity that accommodates at least part of a motor. The mounting portion is used to mount the drive shaft of the motor. Multiple blades have their inner ends connected to the circumferential outer surface of the hub. The outer peripheral sidewall of the guide portion is provided with multiple flow ports spaced circumferentially. The opening direction of the flow ports is the same as the rotation direction of the wind turbine, so that the airflow located on the air inlet side of the wind turbine can flow into the cavity through the flow ports.

[0009] Preferably, the wind turbine has a first end and a second end, the first end being the end closer to the air inlet side and the second end being the end farther from the air inlet side, and the hub connecting each of the blades is located on the side closer to the second end.

[0010] Preferably, the flow guide includes a transition section disposed between two circumferentially adjacent flow ports, wherein a portion of the outer wall of the transition section is concave to form a downward pressure section, and another portion of the outer wall of the transition section is convex to form a hollow pressurizing section communicating with the receiving cavity; wherein, along the rotation direction of the impeller, the outer edge of the preceding transition section and the outer edge of the downward pressure section of the following transition section jointly define the flow port; on the same transition section, the pressurizing section is located upstream of the downward pressure section, and the protrusion height of the pressurizing section gradually increases along the rotation direction of the impeller.

[0011] Preferably, the number of flow ports is 8-12.

[0012] Preferably, the width of the flow port gradually increases from the direction close to the mounting portion to the direction far from the mounting portion.

[0013] Preferably, the distance between the hub and the end face of the second end of the wind turbine is 8-15mm.

[0014] Preferably, the mounting part is a hollow frustum shape, and at least part of the end of the mounting part away from the guide part extends out of the central air inlet cavity formed by the blades; the mounting part is provided with a bushing suitable for connecting the drive shaft of the motor, and a plurality of reinforcing ribs are provided circumferentially between the outer peripheral wall of the bushing and the inner peripheral wall of the mounting part.

[0015] Secondly, embodiments of this application provide a wind turbine assembly, including a volute, a motor, and an impeller, wherein the impeller is a low-noise wind turbine structure as described in any embodiment of the first aspect.

[0016] Preferably, a wiring hole is provided on the side wall of the volute, the wiring hole is used for the power supply wires to pass through, and the wiring hole is located on the horizontal radial side of the motor rotation axis and is lower than the height of the motor rotation axis.

[0017] Thirdly, embodiments of this application provide a dehumidifier, including the fan assembly described in any embodiment of the second aspect.

[0018] The low-noise impeller structure, fan assembly, and dehumidifier designed in this application optimize the airflow organization inside the impeller by setting a guide section with a specific flow port inside the impeller. This makes the airflow more regular and smooth when entering the containment cavity and interacting with the blades, thereby effectively reducing aerodynamic noise while increasing air volume. At the same time, the containment cavity formed by the guide section can partially enclose the motor, reducing the leakage of motor noise. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the low wind noise wind turbine structure provided in the embodiments of this application.

[0020] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0021] Figure 3 yes Figure 1 Enlarged diagram of point B in the middle.

[0022] Figure 4 yes Figure 1 Front view.

[0023] Figure 5 yes Figure 4 Sectional view at point CC.

[0024] Figure 6 This is a three-dimensional structural diagram of the wind turbine provided in an embodiment of this application from another perspective.

[0025] Figure 7 This is an exploded perspective view of the wind turbine assembly provided in the embodiments of this application.

[0026] Figure 8 yes Figure 7 Enlarged diagram of point D in the middle.

[0027] Figure 9 This is a three-dimensional structural diagram of the volute provided in an embodiment of this application.

[0028] Figure 10 This is a schematic diagram of the motor wiring harness provided in the embodiments of this application.

[0029] The components include: impeller 100, first end 101, second end 102, bracket 10, hub 11, mounting part 12, bushing 121, reinforcing rib 122, guide part 13, transition part 131, pressing part 132, pressurizing part 133, ring platform part 134, receiving cavity 14, blade 20, top ring 21, annular inclined surface 211, arc surface 212, bottom ring 22, inclined part 23, arc-shaped transition part 24, flow port 30, volute 40, wiring hole 41, annular mounting base 42, wall 43, bottom wall 44, motor 50, wire harness 51, groove 60, first wall 61, second wall 62, third wall 63, drain outlet 70, and fan assembly 200. Detailed Implementation

[0030] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0031] In a first aspect, embodiments of this application provide a low-noise impeller structure 100, which is suitable for various devices requiring airflow, such as impellers used as fan components in dehumidifiers, air purifiers, air conditioners, and other household / industrial equipment. In this embodiment, the impeller 100 has an air inlet side for airflow entry and an air outlet side opposite to the air inlet side.

[0032] like Figures 1 to 6 As shown, the wind turbine 100 mainly includes a support 10 and multiple blades 20.

[0033] The support structure 10 connects multiple blades 20 and includes a hub 11, a mounting portion 12, and a guide portion 13 connecting the hub 11 and the mounting portion 12. In this embodiment, the hub 11 is typically a disc-shaped or near-disc-shaped structure, and the inner ends of the multiple blades 20 are connected to the circumferential outer surface of the hub 11, firmly connected to the hub 11. The mounting portion 12 is located on the air inlet side of the impeller 100 and is used to mount the drive shaft of the motor to transmit power.

[0034] The airflow guide 13 is located on the air inlet side of the impeller 100 and connects between the hub 11 and the mounting part 12. In this embodiment, the airflow guide 13 is a hollow frustum shape, specifically, its large end is connected to or integrally formed with the hub 11, and its small end is connected to or integrally formed with the mounting part 12. At the same time, the airflow guide 13 forms a receiving cavity 14 that at least partially accommodates the motor. That is, the inner wall of the hollow airflow guide 13 forms a receiving cavity 14 with an opening facing away from the air inlet side. This receiving cavity 14 is used to at least partially accommodate the motor, thereby blocking some noise. In specific implementation, the rotor part of the motor or a part of the entire motor extends into the receiving cavity 14, and the drive shaft of the motor passes through the receiving cavity 14 and connects to the mounting part 12 to drive the impeller 100 to rotate.

[0035] Multiple flow ports 30 are arranged circumferentially on the outer peripheral sidewall of the flow guide 13. The opening direction of the flow ports 30 is the same as the rotation direction of the impeller 100, that is, the outlet of the flow port 30 faces the rotation direction of the impeller 100, so that the airflow located on the air inlet side of the impeller 100 can flow through the flow ports 30 into the receiving cavity 14.

[0036] Thus, when the impeller 100 rotates, the external airflow located on the air inlet side of the impeller 100, besides being mainly driven through the gaps between the blades 20, also has a portion that can smoothly flow into the receiving cavity 14 through these flow ports 30 aligned with the rotation direction. This portion of airflow entering the receiving cavity 14 can, on the one hand, cool the motor inside the receiving cavity 14, and on the other hand, mix with the main airflow drawn in by the blades 20 within the receiving cavity 14, thereby effectively improving the air intake conditions of the impeller 100, reducing airflow separation and turbulence, and improving aerodynamic efficiency. This means that when the impeller 100 operates at the same rotational speed, the airflow it can deliver is 30%-50% greater, or, under the premise of delivering the same airflow, the rotational speed can be reduced, thereby further reducing energy consumption and noise. In this embodiment, the number of flow ports 30 is 8-12. Specifically, the number of flow ports 30 can be 8, 9, 10, 11, or 12.

[0037] In some embodiments, such as Figure 4 , Figure 5 As shown, the wind turbine 100 has a first end 101 and a second end 102, with the first end 101 being closer to the air inlet side and the second end 102 being farther from the air inlet side. The hub 11, which connects to each blade 20, is located closer to the second end 102. That is, in the axial direction of the wind turbine 100, the hub 11 is positioned closer to the motor located on the second end 102 side, thereby reducing the overall axial dimension of the wind turbine 100 and effectively improving the mass distribution of the wind turbine 100, optimizing its dynamic balance characteristics, and reducing vibration and noise caused by imbalance. In this embodiment, the distance between the hub 11 and the end face of the second end 102 of the wind turbine 100 is 8-15 mm.

[0038] In some embodiments, such as Figure 1 , Figure 3 , Figure 5As shown, the wind turbine 100 also includes a top ring 21 and a bottom ring 22 connected to the two ends of the axial direction of the multiple blades 20. Specifically, the top ring 21 has an annular inclined surface 211 extending obliquely downward from the inner edge to the outer edge, and the inner edge of the top ring 21 is higher than its outer edge in the axial direction, so that the annular inclined surface 211 forms the lower surface of the top ring 21 facing the bottom ring 22, and the annular inclined surface 211 also serves as the connecting surface between the top ring 21 and the top tip of each blade 20, so that the overall shape of the top ring 21 is similar to an upwardly narrowing frustum structure, which can have higher inherent structural rigidity and deformation resistance, thereby effectively resisting the structural deformation risk that may be caused by centrifugal force and load transmitted by the blades 20 when the wind turbine rotates at high speed.

[0039] Specifically, the bottom end of each blade 20 is connected to the bottom ring 22, and the top end of each blade 20 is connected to the top ring 21 via an annular inclined surface 211. In this way, the top end of the blade 20 is no longer connected to a flat surface, but to an inclined surface, namely the annular inclined surface 211. This connection method, without affecting the wind turbine's air intake area, increases the effective contact area and contact length between the top end of the blade 20 and the top ring 21 by utilizing the inclination of the annular inclined surface 211. This allows for better decomposition and transmission of forces acting at the connection point, thereby enhancing the overall structural strength and rigidity of the wind turbine. This more effectively resists the centrifugal force generated during rotation and the load transmitted by the blades, helping to maintain the dynamic balance and aerodynamic performance of the entire wind turbine.

[0040] In one specific embodiment, the top ring 21, the bottom ring 22, and the multiple blades 20 are integrally injection molded structures. This integral molding method allows for a seamless connection between the components, which not only improves the overall structural integrity but also simplifies the production and assembly process and reduces manufacturing costs.

[0041] In some embodiments, such as Figure 3 As shown, the top end of the blade 20 is provided with an inclined portion 23 corresponding to the position of the annular inclined surface 211, and the blade 20 is connected and fixed to the annular inclined surface 211 through the inclined portion 23. In this embodiment, the inclination angle and / or curved surface shape of the inclined portion 23 is adapted to or substantially consistent with the inclination angle and / or curved surface shape of the annular inclined surface 211 at its connection position, thereby firmly connecting and fixing it to the annular inclined surface 211.

[0042] In one specific implementation, such as Figure 2 , Figure 3 As shown, the inclined part 23 is located at the outer edge of the tip of the blade 20, that is, at the outermost radial edge of the blade 20. This is beneficial for the effective matching and connection of the inclined part 23 with the annular inclined surface 211 of the top ring 21, and can also effectively reduce the occupation of the effective air intake area of ​​the wind turbine or the interference with the incoming airflow.

[0043] In some embodiments, such as Figure 5 As shown, the annular inclined surface 211 is an arc-shaped inclined surface with an opening facing outwards. In this embodiment, viewed from the axial cross-section of the wind turbine, the annular inclined surface 211 is not a straight line but an arc with a certain curvature. The outline of the annular inclined surface 211 is not a straight line but an arc with a predetermined curvature. The opening of this arc is set towards the air inlet side, and simultaneously... Figure 3 The inclined portion 23 of the blade 20 shown also has a matching arcuate surface, which can further increase the effective contact area between the annular inclined surface 211 and the inclined portion 23, so as to further improve the connection strength and durability.

[0044] In some embodiments, such as Figure 1 , Figure 5 As shown, the surface of the top ring 21 facing away from the annular inclined surface 211, that is, the upper surface of the top ring 21, is an outward-opening arc surface 212, in order to improve the overall torsional rigidity of the top ring 21.

[0045] In some embodiments, such as Figure 1 , Figure 5 As shown, the bottom end of the blade 20 extends outward from the bottom ring 22 to form an extension, and an upwardly inclined arc-shaped transition portion 24 is provided at the outer edge of the extension. The design of this arc-shaped transition portion 24 can effectively avoid the formation of sharp edges at the bottom edge of the wind turbine, thereby improving safety during operation or assembly. Furthermore, the connection between the arc-shaped transition portion 24 and the bottom ring 22 is smooth.

[0046] In some embodiments, such as Figure 1 , Figure 2 and Figure 5 As shown, the flow guide 13 includes a transition section 131 disposed between two circumferentially adjacent flow ports 30. A portion of the outer wall of the transition section 131 is concave to form a downward pressure section 132, and another portion of the outer wall of the transition section 131 convexes to form a hollow pressurizing section 133 communicating with the receiving cavity 14. Along the rotation direction of the impeller 100, the outer edge of the preceding transition section 131 and the outer edge of the downward pressure section 132 of the following transition section 131 jointly define the flow port 30. That is, during rotation, the airflow first passes through the pressurizing section 133 of a transition section 131, then its downward pressure section 132, and then enters the receiving cavity 14 through the flow port 30 formed by the leading edge of the downward pressure section 132 and the trailing edge of the preceding transition section 131.

[0047] Specifically, a portion of the outer wall of the transition section 131 is recessed inward relative to the reference circumference of the guide section 13 to form a pressure section 132. The recessed pressure section 132 helps to guide and converge the airflow when it approaches, facilitating the smooth entry of the airflow into the subsequent flow port 30. Meanwhile, another portion of the outer wall of the transition section 131 is protruding outward relative to the reference circumference of the guide section 13 to form a raised pressure section 133. This pressure section 133 is hollow and its internal space is connected to the receiving cavity 14 of the impeller 100. On the same transition section 131, the pressure section 133 is located upstream of the pressure section 132, and the protrusion height of the pressure section 133 gradually increases along the rotation direction of the impeller 100. That is, the windward surface of the pressure section 133 is a smooth curved surface, and the airflow velocity is increased when the airflow flows over its surface.

[0048] Therefore, when the impeller 100 rotates, the external airflow first comes into contact with the guide section 13 and flows through the pressurization section 133 located on the upstream side, where the airflow is accelerated. Subsequently, this accelerated airflow flows to and enters the pressure section 132 on the downstream side, where the airflow converges and is compressed, achieving pressurization. Then it enters the central receiving cavity 14 and finally merges with the airflow drawn in by the main flow channel below the blades 20, making the airflow discharged from the impeller 100 smoother and more powerful. It can simultaneously achieve a larger air volume output and a higher wind speed, and also helps to reduce the noise caused by airflow turbulence and remove some of the heat from the motor, improving heat dissipation performance.

[0049] In some embodiments, such as Figure 2 , Figure 5 As shown, the bottom outer edge of the guide section 13 is bent to form a truncated ring 134. The guide section 13 is connected to the hub 11 through the truncated ring 134, making the guide section 13 less prone to deformation. One end of the flow port 30 extends from the top surface of the guide section 134 to the truncated ring 134. The downward pressure section 132 extends to the truncated ring 134, which expands the effective air intake area of ​​the flow port 30, enabling it to more effectively capture and guide the airflow into the receiving cavity 14.

[0050] In some embodiments, such as Figure 1 , Figure 2 As shown, the width of the air inlet 30 gradually increases from near the mounting portion 12 to away from the mounting portion 12, in order to further increase the air intake area. Understandably, in addition to adopting the structure of the pressure-reducing portion 132 and the pressure-boosting portion 133 described above, each transition portion 131 of the guide portion 13 can also adopt a fan-blade-like structure.

[0051] In some embodiments, such as Figures 4 to 6As shown, the mounting portion 12 is a hollow frustum shape. Its larger diameter end connects to the guide portion 13, while its smaller diameter end faces the first air inlet end 101 of the impeller 100. This frustum-shaped outer contour also helps guide some external airflow smoothly through its surroundings, reducing unnecessary flow resistance. Simultaneously, the end of the mounting portion 12 facing away from the guide portion 13 extends at least partially beyond the central air inlet cavity formed by the blades 20, and a bushing 121 suitable for connecting the drive shaft of the motor is provided inside the mounting portion 12. In a specific implementation, the sum of the axial heights of the guide portion 13 and the mounting portion 12 is greater than the axial height of the blades 20. Thus, the overall axial length of the mounting portion 12 can be made longer relative to the overall size of the impeller 100, and correspondingly, the bushing 121 can also be made longer to form a larger contact and fit with the motor drive shaft. This achieves higher connection torque bearing capacity, better coaxiality maintenance, and stronger anti-vibration loosening resistance, thereby ensuring the stability of power transmission and the long-term reliability of the connection.

[0052] In addition, such as Figure 6 As shown, a plurality of reinforcing ribs 122 are circumferentially spaced between the outer peripheral wall of the bushing 121 and the inner peripheral wall of the mounting portion 12. The number of reinforcing ribs 122 can be determined according to factors such as the diameter of the mounting portion 12 and the expected load, for example, 3, 4, 6 or more can be provided. When the motor starts, brakes or the load fluctuates, causing changes in torque, the torsional force acting on the bushing 121 can be effectively dispersed and transferred to the wider housing structure of the mounting portion 12 through these reinforcing ribs 122, avoiding excessive stress concentration at the interface between the bushing 121 and the mounting portion 12 or at certain structural weak points, thereby reducing the risk of cracking or damage due to fatigue or overload.

[0053] Secondly, such as Figure 7 As shown, this application provides a fan assembly 200, including a volute 40, a motor 50 and an impeller. The impeller is a low-noise wind turbine structure 100 of any embodiment of the first aspect, which enables the entire fan assembly 200 to effectively reduce its overall noise level while ensuring or improving air volume and air pressure output during operation.

[0054] In some embodiments, such as Figure 7 , Figure 9 , Figure 10As shown, a wiring hole 41 is provided on the side wall of the volute 40. The wiring hole 41 is used for the wiring harness 51 of the motor 50 to pass through, and the wiring hole 41 is located on the horizontal radial side of the rotation axis of the motor 50 and is lower than the height of the rotation axis of the motor 50. In a specific implementation, the wiring harness 51 extends obliquely upward through the wiring hole 41. At the same time, the wiring hole 41 is not directly located above or below the rotation axis of the motor 50, but is offset to one side. This makes it more likely that when condensation water forms along the wiring harness 51 or near the wiring hole 41, water droplets will flow and drip to the outside of the volute 40.

[0055] In this embodiment, an annular mounting base 42 protrudes from the volute 40 at the position corresponding to the motor 50. The annular mounting base 42 is integrally formed with the volute 40. During installation, the fixing feet of the motor 50 are fixedly mounted on the annular mounting base 42 with screws. In this way, the integral annular mounting base 42, compared with the separate stud base in related technologies, can avoid the motor 50 resonating with the volute 40 during operation and generating noise.

[0056] In some embodiments, such as Figure 7 As shown, the volute 40 has a wall 43 and a bottom wall 44. The wall 43 is usually spiral or involute, while the bottom wall 44 closes one end of the volute 40, so that the wall 43 and the bottom wall 44 together form an inner cavity. This inner cavity is mainly used to accommodate the impeller 100. When the impeller 100 rotates, air is drawn in and flows along the inner cavity before being discharged from the outlet of the volute 40.

[0057] In addition, such as Figure 7 , Figure 8 As shown, a groove 60 is formed by indentation on the outer surface of the wall 43. The groove 60 is located at the edge where the wall 43 connects to the bottom wall 44. A drain outlet 70 is provided on the groove wall downstream of the impeller 100 in the rotation direction. The inner cavity is connected to the groove 60 through the drain outlet 70. The bottom edge of the drain outlet 70 is level with or lower than the height of the inner surface of the bottom wall 44, so that the water accumulated in the inner cavity can be discharged from the volute 40 through the drain outlet 70.

[0058] This structure, unlike the method of directly opening holes in the bottom wall 44 for drainage, utilizes a groove 60 with a drainage outlet 70 on the groove wall downstream of the impeller 100's rotation direction. The opening of the drainage outlet 70 faces downstream of the impeller 100's rotation direction, effectively preventing the high-speed airflow generated by the impeller 100's high-speed rotation from directly impacting the drainage outlet 70 and producing a whistling sound, thus reducing operating noise and improving the user experience. Furthermore, to ensure smooth drainage, the bottom edge of the drainage outlet 70 is designed to be flush with or slightly lower than the inner surface of the bottom wall 44. This allows water that may accumulate inside the cavity to flow unimpeded through the drainage outlet 70 into the groove 60 and ultimately drain from the groove 60 to the outside of the volute 40.

[0059] In some embodiments, such as Figure 8 , Figure 9 , Figure 10 As shown, the groove 60 includes at least a first wall 61, a second wall 62 angled to the first wall 61, and a third wall 63 connecting the first wall 61 and the second wall 62. The first wall 61 is located upstream in the rotation direction of the impeller 100, and the third wall 63 is opposite to the opening of the groove 60. The second wall 62, the third wall 63, the wall body 43, and the bottom wall 44 together define the drain outlet 70. That is, the boundary of the drain outlet 70 is defined by the edge portion of the second wall 62, the side edge of the third wall 63, the wall body 43 of the volute 40, and the bottom wall 44 of the volute 40, which is easy to integrate and manufacture, and has little impact on the overall structure of the volute 40.

[0060] In some embodiments, such as Figures 7 to 9 As shown, the bottom of the groove 60 has an opening facing the outside of the volute 40. This means that the groove wall of the groove 60 is not continuous and complete, and its bottom groove wall is open. This allows water flowing into the groove 60 from the drain port 70 to be discharged directly from the opening to the outside of the volute 40, for example, smoothly dripping into the water collection tray (not shown) set inside the dehumidifier, avoiding secondary accumulation of water in the groove 60 and ensuring immediate and thorough drainage.

[0061] Thirdly, embodiments of this application also provide a dehumidifier, including a fan assembly 200 according to any embodiment of the second aspect.

[0062] The low-noise impeller structure, fan assembly, and dehumidifier provided in this application optimize the airflow organization inside the impeller by setting a guide section with a specific flow port inside the impeller. This makes the airflow more regular and smooth when entering the receiving cavity and interacting with the blades, thereby effectively reducing aerodynamic noise while increasing air volume. At the same time, the receiving cavity formed by the guide section can partially enclose the motor, reducing the leakage of motor noise.

[0063] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0064] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0065] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A low-noise wind turbine structure, characterized in that, include: The bracket includes a hub and a mounting part, and a guide part connecting the hub and the mounting part. The guide part and the mounting part are both located on the air inlet side of the wind turbine. The guide part is a hollow frustum shape and forms a receiving cavity that accommodates at least part of the motor. The mounting part is used to install the drive shaft of the motor. Multiple blades, the inner ends of which are connected to the circumferential outer surface of the hub; wherein, multiple flow ports are circumferentially spaced on the outer peripheral sidewall of the guide section, and the opening direction of the flow ports is the same as the rotation direction of the wind turbine, so that the airflow located on the wind turbine inlet side can flow through the flow ports into the receiving cavity.

2. The low-noise wind turbine structure according to claim 1, characterized in that, The wind turbine has a first end and a second end, the first end being the end closer to the air inlet side and the second end being the end farther away from the air inlet side. The hub connecting each of the blades is located on the side closer to the second end.

3. The low-noise wind turbine structure according to claim 1, characterized in that, The flow guide includes a transition section disposed between two circumferentially adjacent flow ports. A portion of the outer wall of the transition section is concave to form a downward pressure section, and another portion of the outer wall of the transition section is convex to form a hollow pressurizing section communicating with the receiving cavity. Along the rotation direction of the impeller, the outer edge of the preceding transition section and the outer edge of the downward pressure section of the following transition section jointly define the flow port. On the same transition section, the pressurizing section is located upstream of the downward pressure section, and the protrusion height of the pressurizing section gradually increases along the rotation direction of the impeller.

4. The low-noise wind turbine structure according to claim 1, characterized in that, The number of flow outlets is 8-12.

5. The low-noise wind turbine structure according to claim 1, characterized in that, The width of the flow port gradually increases from the direction closer to the mounting part to the direction farther away from the mounting part.

6. The low-noise wind turbine structure according to claim 2, characterized in that, The distance between the hub and the end face of the second end of the wind turbine is 8-15mm.

7. The low-noise wind turbine structure according to claim 1, characterized in that, The mounting part is a hollow frustum shape, and at least one end of the mounting part away from the guide part extends out of the central air inlet cavity formed by the blades; the mounting part is provided with a bushing suitable for connecting the drive shaft of the motor, and a plurality of reinforcing ribs are provided circumferentially between the outer peripheral wall of the bushing and the inner peripheral wall of the mounting part.

8. A fan assembly, comprising a volute, a motor, and an impeller, characterized in that, The impeller is the low-noise wind turbine structure as described in any one of claims 1-7.

9. The wind turbine assembly according to claim 8, characterized in that, The volute has a wiring hole on its side wall for the power supply wiring harness to pass through, and the wiring hole is located on the horizontal radial side of the motor rotation axis and is lower than the height of the motor rotation axis.

10. A dehumidifier, characterized in that, Includes the wind turbine assembly as described in claim 8 or 9.

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