Impeller, air handling apparatus, and airflow control method

Abstract

Provided in the present application are an impeller, an air handling apparatus, and an airflow control method. The wind wheel comprises a first air output portion and a second air output portion. The first air output portion is configured to drive gas to flow so as to generate a first airflow, and the second air output portion is configured to drive gas to flow so as to generate a second airflow. The second airflow is used to change the flow direction of at least part of the first airflow.

Description

Wind turbine, air handling equipment and airflow control methods

[0001] This application claims priority to Chinese Patent Application No. 202510115046.6, filed on January 23, 2025, entitled “Windmill, Air Handling Equipment and Airflow Control Method”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of electrical equipment technology, specifically relating to a wind turbine and air handling equipment. Background Technology

[0003] A fan impeller is a component that drives the flow of gas and is widely used in electrical equipment. For example, in air handling equipment, the fan impeller drives the intake and exhaust of gas, enhancing air circulation. During operation, the motor drives the fan impeller to rotate at high speed inside the casing, thereby driving the gas to flow within the air duct of the casing. Centrifugal fan impellers are a common type of fan impeller. Centrifugal fan impellers blow gas radially outwards; however, the airflow from the centrifugal fan impeller may collide with the inner wall of the air duct, resulting in energy loss. Summary of the Invention

[0004] In a first aspect of this application, a wind turbine is provided, including a first air outlet and a second air outlet. The first air outlet is used to drive gas flow to generate a first airflow, and the second air outlet is used to drive gas flow to generate a second airflow. The second airflow is used to change the flow direction of at least a portion of the first airflow.

[0005] In one possible implementation, the second air outlet is disposed on the outer periphery of the first air outlet, and the air outlet path of the first air outlet intersects with the air outlet path of the second air outlet, so that at least a portion of the first airflow flows along the axial direction of the impeller.

[0006] In one possible implementation, the first air outlet is a centrifugal section, and the air outlet direction is the centrifugal direction of the impeller; the second air outlet is an axial section, and the air outlet direction is the axial direction of the impeller, so that at least a portion of the airflow in the second airflow is parallel to the axial direction of the impeller.

[0007] In one possible implementation, the centrifugal section includes a plurality of centrifugal fan blades arranged circumferentially along the impeller, and the axial flow section is connected to the centrifugal fan blades.

[0008] In one possible implementation, the axial flow section extends into a ring, is sleeved on the outer periphery of the centrifugal section, and is connected to the tip of the centrifugal fan blade.

[0009] In one possible implementation, the axial flow section includes an inner ring plate and a plurality of axial flow blades. The inner ring plate is connected to the centrifugal blades, and the plurality of axial flow blades are connected to the side of the inner ring plate away from the centrifugal blades and arranged circumferentially along the impeller.

[0010] In one possible implementation, the centrifugal section further includes an annular impeller cover connected to one end of the blade tip of the plurality of centrifugal fan blades near the air inlet end of the first air outlet, and extending along the direction of the first airflow to the inner ring plate.

[0011] In one possible implementation, the diameter of the impeller cover gradually increases along the direction of the first airflow.

[0012] In one possible implementation, the axial flow section includes an outer ring plate, and the end of the axial flow fan blade away from the centrifugal fan blade is connected to the outer ring plate.

[0013] In one possible implementation, the wind turbine further includes a hub, the center of which is connected to a motor shaft; a first blade of the first air outlet is connected to the hub and extends outward from the center of the hub; a second blade of the second air outlet is disposed around the periphery of the first blade and spaced apart from the hub; when the motor shaft rotates, the airflow generated by the second blade at least partially guides the direction of the airflow generated by the first blade.

[0014] In one possible implementation, the end of the blade tip near the air inlet of the centrifugal section is the first end, and the end away from the air inlet of the centrifugal section is the second end, with the second end located downstream of the air outlet direction of the axial flow section; in the axial direction of the impeller, the distance between the axial flow section and the first end is less than the distance between the axial flow section and the second end; or, the axial flow section is disposed on the first end.

[0015] In one possible implementation, the second air outlet and the first air outlet are an integral structure.

[0016] In one possible implementation, the second air outlet is coaxially arranged with the first air outlet.

[0017] A second aspect of this application provides an air handling device, including a fan wheel as described above; the air handling device includes an air duct, and the fan wheel is disposed within the air duct.

[0018] In one possible implementation, the air outlet of the second air outlet faces the downstream side of the air duct, the air inlet of the second air outlet is connected to the air inlet of the air duct, and the air inlet of the first air outlet is connected to the air inlet of the air duct.

[0019] In one possible implementation, the air outlet of the second air outlet is directed toward the air outlet of the air duct, and the air inlet and air outlet of the air duct are arranged approximately along the axial direction of the impeller.

[0020] In one possible implementation, a flow gap is provided between the second air outlet and the inner wall of the air duct in the radial direction of the impeller. The flow gap is connected to the air inlet of the second air outlet so that the gas in the flow gap can enter the air inlet of the second air outlet.

[0021] In one possible implementation, the air duct includes a first guide section located downstream of the second air outlet, at least a portion of which is arranged radially opposite to the first air outlet of the impeller; the inner wall of the first guide section is arc-shaped, and in the flow direction, the shortest distance between the inner wall of the first guide section and the first air outlet increases progressively.

[0022] In one possible implementation, the air handling device includes a motor bracket and a motor assembly, the motor assembly being connected to the impeller and mounted on the motor bracket; the motor bracket is provided with a plurality of guide vanes, the guide vanes being disposed on the outer periphery of the motor assembly, and the guide vanes being located within the air duct; a first guide section is located upstream of the motor bracket; the air duct includes a second guide section, the second guide section being located downstream of the motor bracket, the end of the second guide section away from the motor bracket extending in a curved manner toward the exhaust port of the air handling device; the air handling device includes an electronic control unit, the electronic control unit being connected to the motor bracket, and the second guide section being disposed on the outer periphery of the electronic control unit.

[0023] A third aspect of this application provides an airflow control method for an air handling device, the method comprising:

[0024] Controlling the first air outlet drives the gas flow to form the first airflow;

[0025] Controlling the second air outlet drives the gas flow to form a second airflow;

[0026] The second airflow is used to change the direction of at least a portion of the first airflow, causing the first airflow to flow toward the air outlet of the air handling device.

[0027] A fourth aspect of this application provides a wind turbine, including a centrifugal section and an axial flow section, wherein the centrifugal section and the axial flow section are used to drive gas flow, and the air outlet path of the centrifugal section intersects with the air outlet path of the axial flow section.

[0028] The embodiments of this application provide a wind turbine, air handling equipment, and airflow control method. In the wind turbine, by causing a second airflow driven by a second air outlet to change the direction of at least a portion of the first airflow driven by a first air outlet, the airflow from the second air outlet causes the airflow from the first air outlet to change direction, reducing direct collision between the airflow from the first air outlet and the duct wall, thereby reducing energy loss and improving airflow performance. By reducing direct collision between the airflow from the first air outlet and the duct wall, wind noise can also be reduced, noise quality optimized, and a relatively quiet operating environment created. Attached Figure Description

[0029] Figure 1 schematically shows the structure of the wind turbine from a first-person perspective;

[0030] Figure 2 schematically shows the structure of the wind turbine from a second perspective;

[0031] Figure 3 schematically shows the structure of the wind turbine from a third-person perspective;

[0032] Figure 4 schematically shows the structure of the wind turbine from a fourth perspective;

[0033] Figure 5 schematically shows the structure of the air handling equipment;

[0034] Figure 6 schematically shows the structural diagram of the motor bracket of the air handling equipment;

[0035] Figure 7 schematically shows the structure of the air handling unit during operation.

[0036] The reference numerals in the attached drawings are as follows: 1. First air outlet; 11. Centrifugal fan blade; 111. Blade tip; 1111. First end; 1112. Second end; 12. Impeller cover; 13. Hub; 2. Second air outlet; 21. Axial flow fan blade; 22. Inner ring plate; 23. Outer ring plate; 31. Air inlet; 32. Flow gap; 33. First guide section; 34. Second guide section; 35. Air outlet; 4. Motor bracket; 41. Guide vane; 5. Motor assembly; 6. Electrical control unit; 7. Exhaust vent. Detailed Implementation

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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.

[0038] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0041] Referring to Figures 1 to 4, according to a first aspect of an embodiment of this application, a wind turbine is provided, including a first air outlet 1 and a second air outlet 2. The first air outlet 1 is used to drive gas flow to generate a first airflow, and the second air outlet 2 is used to drive gas flow to generate a second airflow. The second airflow is used to change the flow direction of at least a portion of the first airflow.

[0042] By altering the direction of at least a portion of the airflow in the first airflow driven by the first airflow driven by the first airflow driven by the second air outlet 2, the direct collision between the airflow from the first air outlet 1 and the duct wall is reduced, thereby reducing energy loss and improving the airflow effect. Reducing the direct collision between the airflow from the first air outlet 1 and the duct wall also lowers wind noise, optimizes noise quality, and creates a relatively quiet operating environment.

[0043] In some embodiments, the first air outlet 1 and the second air outlet 2 can be arranged adjacent to each other. For example, the second air outlet 2 can be arranged on the adjacent inner side or adjacent outer side of the first air outlet 1 so that the second airflow can be used to change the flow direction of at least a portion of the airflow in the first airflow. In some embodiments, the second air outlet 2 can be arranged on the outer peripheral side of the first air outlet 1, or in some embodiments, the second air outlet 2 can be arranged on the inner peripheral side of the first air outlet 1 so that the second airflow can be used to change the flow direction of at least a portion of the airflow in the first airflow, etc.

[0044] The second airflow has a different flow direction than the first airflow, which allows the second airflow to change the flow direction of at least a portion of the first airflow.

[0045] As a feasible implementation method, the direction of the first airflow can be the centrifugal direction of the wind turbine, and the direction of the second airflow can be the axial direction of the wind turbine, thereby causing the second airflow to drive the first airflow to change its direction. It can be understood that the axial direction of the wind turbine can be a direction parallel to or approximately parallel to the rotation axis of the wind turbine.

[0046] Specifically, the first air outlet 1 may include fan blades extending in the centrifugal direction, thereby enhancing centrifugal airflow. The second air outlet 2 may include fan blades tilted in the axial direction, thereby enhancing axial airflow.

[0047] As another feasible implementation, the first airflow can flow in the centrifugal direction of the wind turbine, and the second airflow can flow in the oblique direction of the wind turbine, thereby causing the second airflow to drive the first airflow to change its direction. The oblique direction of the wind turbine refers to a direction that forms an acute angle with both the axial and centrifugal directions and faces outwards.

[0048] Specifically, the first air outlet 1 may include centrifugally extending fan blades, and the second air outlet 2 may include obliquely arranged fan blades, such as oblique flow fan blades (or mixed flow fan blades, etc.), thereby enhancing the oblique airflow. The airflow from the second air outlet 2 can be used to change the airflow direction of the first air outlet 1. As another feasible implementation, the flow direction of the first airflow and the flow direction of the second airflow can be oblique to the impeller, or the second airflow can drive the first airflow to change its flow direction.

[0049] Specifically, the first air outlet 1 and the second air outlet 2 may include obliquely arranged fan blades, such as oblique flow fan blades (or mixed flow fan blades, etc.), thereby enhancing oblique airflow.

[0050] It should be noted that the flow direction of the second airflow is different from that of the first airflow, which can change the flow direction of at least part of the airflow in the first airflow. The flow direction of the second airflow and the flow direction of the first airflow are not limited to the three flow directions mentioned above, and can also be other flow directions. This embodiment does not limit them here.

[0051] The first air outlet 1 and the second air outlet 2 are components of the impeller. The first air outlet 1 and the second air outlet 2 can be an integral structure or a separate structure.

[0052] Specifically, when the first air outlet 1 and the second air outlet 2 are an integral structure, they can be integrally molded or manufactured separately and then connected and fixed together. The first air outlet 1 and the second air outlet 2 form a whole, so that the first air outlet 1 and the second air outlet 2 rotate synchronously, thereby synchronously driving the gas flow and thus discharging air to the same side.

[0053] Specifically, when the first air outlet 1 and the second air outlet 2 are separate structures, it can be understood that the first air outlet 1 and the second air outlet 2 are independent components. The first air outlet 1 is a centrifugal impeller, and the second air outlet 2 is an axial flow impeller. The axial flow impeller and the centrifugal impeller can be connected together or not connected. The axial flow impeller and the centrifugal impeller work together and cooperate, so that the air outlet of the axial flow impeller drives the air outlet of the centrifugal impeller to change direction.

[0054] In some embodiments, the second air outlet 2 may be disposed on the outer periphery of the first air outlet 1, and the air outlet path of the first air outlet 1 intersects with the air outlet path of the second air outlet 2, so that at least a portion of the first airflow flows along the axial direction of the impeller.

[0055] By placing the second air outlet 2 on the outer periphery of the first air outlet 1, and having the air outlet path of the first air outlet 1 intersect with the air outlet path of the second air outlet 2, the second air outlet 2 can effectively drive the air outlet of the first air outlet 1 to change direction, thereby reducing the direct collision between the air outlet of the centrifugal part and the duct wall, and thus reducing the energy loss of the air outlet and the noise generated.

[0056] The air outlet path of the first air outlet 1 refers to the path through which the first airflow passes. The air outlet path of the second air outlet 2 refers to the path through which the second airflow passes. The air outlet paths of the first air outlet 1 and the second air outlet 2 intersect at an angle, so that the second air outlet 2 can effectively change at least a portion of the first airflow from flowing along the axial direction of the impeller.

[0057] The first air outlet 1 includes a centrifugal section, and the air outlet direction of the first air outlet 1 is the centrifugal direction of the impeller; the second air outlet 2 includes an axial flow section, and the air outlet direction of the second air outlet 2 is the axial direction of the impeller, so that at least a portion of the airflow in the second airflow is parallel to the axial direction of the impeller.

[0058] By including a centrifugal section in the first air outlet 1 and an axial section in the second air outlet 2, the axial airflow from the axial section drives at least a portion of the airflow in the centrifugal outlet to flow parallel to the axial direction of the impeller. This reduces direct collision between the centrifugal outlet airflow and the duct wall, thereby reducing energy loss and improving airflow performance. Reducing direct collision between the centrifugal outlet airflow and the duct wall also lowers wind noise, optimizes noise quality, and creates a relatively quiet operating environment.

[0059] By setting the axial flow section to drive the air outlet of the centrifugal section to turn, the air outlets of the axial flow section and the centrifugal section flow in the same direction, making the air outlet directions more similar. This effectively reduces the backflow phenomenon without occupying too much space.

[0060] The centrifugal section can be considered the part of the wind turbine that propels gas in a centrifugal direction. When the wind turbine is running, the centrifugal section rotates at high speed, exerting a force on the gas, giving it a force perpendicular to the wind turbine's axis of rotation. Under this force, the gas is thrown out along the centrifugal direction of the wind turbine. The outer periphery of the centrifugal section can also be understood as its circumferential outer side, that is, circumferentially on the wind turbine's axis of rotation and radially outside the centrifugal section.

[0061] The axial flow section can be continuous or composed of multiple independent parts. For example, the axial flow section can be a continuously extending ring or composed of multiple independent arc-shaped segments. When the axial flow section is continuously extending, it is fitted around the outer periphery of the centrifugal section. When the axial flow section is composed of multiple independent parts, the multiple parts are arranged sequentially along the outer periphery of the centrifugal section, that is, they are arranged around the outer periphery of the centrifugal section.

[0062] Understandably, whether the axial flow section is continuous or composed of multiple independent parts, it can enhance the airflow direction of the centrifugal section.

[0063] The air outlet direction of the centrifugal section is the centrifugal direction of the wind turbine, and the air outlet direction of the axial section is the axial direction of the wind turbine. Under the guidance of the axial wind force of the axial section, the gas thrown out by the centrifugal section can flow smoothly along the air duct, reducing the energy loss caused by collision with the inner wall of the air duct, improving the efficiency of the wind turbine in converting electrical energy into wind energy, and enhancing the effective utilization of energy.

[0064] The centrifugal section applies a force perpendicular to the rotation axis to the gas, causing the gas to be thrown out in the centrifugal direction. The axial section applies a force parallel to the rotation axis of the impeller to the gas, causing the gas to flow axially, thereby forming a wind wall along the axial direction of the impeller. This wind wall guides the airflow from the centrifugal section, enhancing the airflow direction.

[0065] The centrifugal direction refers to the direction away from the rotation axis of the centrifugal part. It can be the radial direction extending from the straight line of the centrifugal part, or it can be a curved direction. The direction away from the centrifugal part on the circumferential side can be considered the centrifugal direction. The axial direction of the wind turbine can be parallel to the rotation axis of the wind turbine or approximately parallel to the rotation axis of the wind turbine.

[0066] Specifically, the air outlet direction of the axial flow section extends along one side of the rotation axis extension direction. In other words, the rotation axis is a straight line that extends in two directions simultaneously, while the air outlet direction of the axial flow section extends in one direction. That is, the air outlet direction of the axial flow section is basically the same as one of the directions of the rotation axis extension direction.

[0067] The centrifugal section includes multiple centrifugal fan blades 11, which are arranged circumferentially along the impeller. The axial flow section is connected to the centrifugal fan blades 11, providing an installation position for the axial flow section and enabling the air outlet of the centrifugal fan blades 11 to converge with the air outlet of the axial flow section, thus turning the air outlet of the centrifugal section. The structure is simple and robust, enabling the axial flow section and the centrifugal section to rotate stably and synchronously, forming a negative pressure on the outer periphery of the centrifugal section. This draws air to form a wind wall on the outer periphery of the centrifugal section, and the air outlet of the centrifugal section is guided by the wind wall for timely discharge, reducing the backflow loss caused by local high pressure and improving the efficiency of the air duct.

[0068] As shown in Figures 1 to 4, the axial flow section extends into a ring and is fitted onto the outer periphery of the centrifugal section. The axial flow section is connected to the tip 111 of the centrifugal fan blade 11. By extending the axial flow section into a ring and fitting it onto the outer periphery of the centrifugal section, a continuous airflow wall can be formed around the centrifugal section, thereby stably driving the airflow direction of the centrifugal section. The tip 111 of the centrifugal fan blade 11 is the air outlet position of the centrifugal section. By connecting the axial flow section to the tip 111 of the centrifugal fan blade 11, the airflow direction of the centrifugal section can be effectively driven.

[0069] In this centrifugal fan, the tips 111 of the centrifugal fan blades 11 are located on the outer circumferential surface of the same cylinder. The axial flow section is an annular shape and is fitted onto the tips 111 of each centrifugal fan blade 11 to form a connection and fixation.

[0070] Among them, the tip 111 of the centrifugal fan blade 11 refers to the end of the centrifugal fan blade 11 that is away from the rotation axis.

[0071] The centrifugal fan blade 11 extends along the axial direction of the impeller and also bends along the radial direction of the impeller, which can enhance the ability to drive the gas out in a centrifugal direction.

[0072] The axial flow section includes an inner ring plate 22 and multiple axial flow blades 21. The inner ring plate 22 is connected to the centrifugal fan blades 11. The multiple axial flow blades 21 are connected to the side of the inner ring plate 22 away from the centrifugal fan blades 11. The multiple axial flow blades 21 are arranged along the circumference of the impeller.

[0073] By connecting the inner ring plate 22 to the centrifugal fan blade 11, the connection between the centrifugal section and the axial flow section is enhanced, enabling them to rotate synchronously. By arranging multiple axial flow fan blades 21 evenly along the circumference of the impeller on the side of the inner ring plate 22 away from the centrifugal fan blade 11, during rotation, the axial flow fan blades 21 apply an axial force to the gas, guiding the airflow from the centrifugal section towards the axial direction and enhancing directional control.

[0074] Among them, the axial flow fan blade 21 is set at an angle to the plane of the vertical wind turbine rotation axis, thereby enhancing the axial flow of gas and increasing axial air output.

[0075] The inner ring plate 22 forms a cylinder, and extends a certain width along its own axis, so that multiple axial flow blades 21 can be fixed on the outer peripheral wall of the inner ring plate 22. The inner peripheral wall of the inner ring plate 22 is connected to the centrifugal fan blades 11.

[0076] As shown in Figures 2 and 4, the centrifugal section also includes an annular impeller cover 12, which is connected to the tip 111 of the multiple centrifugal fan blades 11 near the air inlet end of the first air outlet 1 and extends along the direction of the first airflow to connect to the inner ring plate 22.

[0077] By providing an impeller cover 12, which is connected to both the blade tip 111 of the centrifugal fan blade 11 and the inner ring plate 22, the overall structural strength is further increased. During high-speed rotation of the wind turbine, the impeller cover 12 can disperse the external forces acting on the centrifugal fan blade 11, reducing deformation and vibration of the centrifugal fan blade 11 and improving the stability of the wind turbine operation. Simultaneously, by connecting the impeller cover 12 to the inner ring plate 22, the connection strength between the axial flow section and the centrifugal section is further strengthened, ensuring stable and reliable operation of the entire wind turbine, reducing the risk of damage, and extending the service life of the wind turbine. Furthermore, the impeller cover 12 also allows for more concentrated airflow into the centrifugal section, improving airflow efficiency.

[0078] The impeller cover 12 can be roughly cylindrical. The inner wall of the cylindrical structure is connected to the end of the tip 111 of the centrifugal fan 11 near the air inlet end of the first air outlet 1. The end of the cylindrical structure away from the air inlet end of the first air outlet 1 extends to the inner ring plate 22.

[0079] Specifically, the impeller cover 12 is coaxially arranged with the centrifugal section and the axial flow section, and the tips 111 of the multiple centrifugal fan blades 11 are connected to the inner wall of the impeller cover 12, which improves the structural strength. The end of the impeller cover 12 is connected to the inner ring plate 22 in the circumferential direction, which further improves the structural strength.

[0080] The diameter of the impeller cover 12 gradually increases along the direction of the first airflow, which can also be understood as the inner diameter of the impeller cover 12 increasing along the direction of the first airflow, and the cross-sectional area of ​​the impeller cover 12 gradually increasing.

[0081] By gradually increasing the diameter of the impeller cover 12 along the direction of the first airflow, a continuous and smooth channel can be constructed for the airflow, enabling the impeller cover 12 to effectively constrain the airflow, reduce disordered airflow diffusion, guide the airflow towards the axial flow section, reduce the energy loss of the airflow, improve the airflow delivery efficiency from the centrifugal section to the axial flow section, and enable the air handling equipment to handle more air per unit time, thereby enhancing the air handling capacity.

[0082] The inner and outer peripheral walls of the impeller cover 12 can be curved surfaces, and the impeller cover 12 can be roughly funnel-shaped. The flared end of the funnel structure extends to connect to the inner ring plate 22, and the constricted end of the funnel structure extends away from the axial flow section along the impeller axis. This further improves the guiding effect, reduces disordered airflow diffusion, and reduces airflow energy loss.

[0083] In one feasible embodiment, the impeller includes an impeller cover 12 and a first air outlet 1. The first air outlet 1 includes a plurality of first blades. The impeller cover 12 is connected to the tip 111 of the plurality of first blades near the air inlet end of the first air outlet 1 and extends along the flow direction of the first airflow to form a guide section. The guide section bends outward along the centrifugal direction of the impeller. When the impeller cover 12 rotates with the first air outlet 1, the airflow is guided into the guide section. The guide section can drive the airflow to flow generally along the axial direction of the impeller. That is, the flow direction of at least a portion of the gas flowing out from the guide section is basically parallel to the axial direction of the impeller, thereby changing the flow direction of at least a portion of the airflow in the first airflow generated by the first air outlet 1.

[0084] The function of the guide section is similar to that of the second air outlet 2 described above. In some embodiments, the guide section can replace the second air outlet 2 to form a second airflow; in some embodiments, the guide section and the second air outlet 2 can also coexist and jointly form a second airflow.

[0085] Specifically, the impeller cover 12 between two adjacent centrifugal blades can be curved outward in an arc shape along the centrifugal direction. That is, the guide section can be set between any two adjacent first blades of the first air outlet 1. The arc-shaped bending structure can have a certain angle with the rotation direction and the axial direction, so that the airflow can be driven to flow axially through the arc-shaped bending structure.

[0086] In some embodiments, the axial flow section includes an outer ring plate 23, and the end of the axial flow fan blade 21 away from the centrifugal fan blade 11 is connected to the outer ring plate 23.

[0087] By incorporating the outer ring plate 23, it works in conjunction with the inner ring plate 22 to fix the axial flow blade 21. During the high-speed rotation of the wind turbine, the axial flow blade 21 is subjected to gas forces, which may cause vibration and deformation. The outer ring plate 23 provides stable support for the axial flow blade 21, reducing its vibration amplitude, enhancing the structural strength of the entire axial flow section, and improving the stability of the wind turbine operation. By connecting the outer ring plate 23 to the axial flow blade 21, the axial flow section becomes more efficient in guiding gas. Specifically, the outer ring plate 23 can, to a certain extent, constrain the gas, concentrating the gas propelled by the axial flow blade 21 in the axial direction, reducing gas diffusion and energy loss.

[0088] The outer ring plate 23 forms a cylinder, and the outer ring plate 23 extends a certain width along its own axis, so that multiple axial flow blades 21 can be fixed on the inner peripheral wall of the outer ring plate 23.

[0089] The outer ring plate 23 and the inner ring plate 22 are coaxially arranged, and their widths in the axial direction can be the same.

[0090] As shown in Figures 3 and 4, the wind turbine also includes a hub 13, the center of which is connected to the motor shaft.

[0091] The first fan blade of the first air outlet 1 is connected to the hub 13 and extends outward toward the center of the hub 13.

[0092] The second air outlet 2 has its second air blade positioned around the periphery of the first air blade and spaced apart from the hub 13.

[0093] When the motor shaft rotates, the airflow generated by the second fan blade guides at least part of the direction of the airflow generated by the first fan blade.

[0094] By setting up a hub 13 and connecting its center to the motor shaft, the motor shaft can drive the hub 13 to rotate around its own central axis. By connecting the first fan blade of the first air outlet 1 to the hub 13, the first fan blade rotates synchronously with the hub 13, thereby enhancing the airflow. By spacing the second fan blade of the second air outlet 2 from the hub 13, an airflow channel is formed, so that when the motor shaft rotates, the airflow generated by the second fan blade can at least partially guide the direction of the airflow generated by the first fan blade.

[0095] The first fan blade can be a centrifugal fan blade 11, and the second fan blade can be an axial fan blade 21. That is, the root of the centrifugal fan blade 11 is connected to the connecting plate, and the tip of the blade 111 is connected to the axial section.

[0096] The hub 13 can be roughly a disc structure, with the disc structure perpendicular to the rotation center of the wind turbine, and the hub 13 is coaxially arranged with the first air outlet 1 and the second air outlet 2.

[0097] Specifically, a connecting hole is provided at the midpoint of hub 13, and the connecting hole extends through hub 13 along the thickness direction of hub 13, through which the motor shaft passes and is connected.

[0098] As one feasible implementation, the end of the blade tip 111 near the air inlet of the centrifugal section is the first end 1111, and the end away from the air inlet of the centrifugal section is the second end 1112. The second end 1112 is located downstream of the axial flow section in the air outlet direction. In the axial direction of the impeller, the distance between the axial flow section and the first end 1111 is less than the distance between the axial flow section and the second end 1112.

[0099] The air outlet direction of the centrifugal section is the centrifugal direction of the impeller, while the air outlet direction of the axial section is parallel to the impeller's rotation axis. By positioning the axial section closer to the first end 1111 and further away from the second end 1112, and placing the second end 1112 downstream of the axial section's air outlet direction, more of the centrifugal section's air outlet can be guided to change direction, improving air outlet efficiency and further reducing the collision between the centrifugal section's air outlet and the inner wall of the duct.

[0100] As another feasible implementation, the axial flow section is disposed on the first end 1111, which can also be understood as the axial flow section being directly formed on the first end 1111, further guiding and redirecting the airflow from the centrifugal section.

[0101] The first air outlet 1 and the second air outlet 2 are integral structures, that is, the centrifugal part and the axial flow part are integral structures, for example, they are integrally molded. The second air outlet 2 can be directly molded on the first end 1111 during manufacturing.

[0102] The first air outlet 1 and the second air outlet 2 are coaxially arranged, meaning the axial flow section and the centrifugal flow section are coaxial. This increases the synchronicity between the second air outlet 2 and the first air outlet 1 during operation, resulting in smoother and more efficient gas flow within the duct. By making the second air outlet 2 coaxial with the first air outlet 1, structural stability is improved, providing better structural stability and balance for the impeller. During high-speed rotation, the centrifugal force on the impeller is distributed more evenly, reducing vibration and swaying caused by center of gravity shift or misalignment of components. This not only reduces mechanical noise but also extends the service life of the impeller.

[0103] The central axis shared by the second air outlet 2 and the first air outlet 1 can be the rotation axis of the wind turbine.

[0104] As shown in Figure 5, a second aspect of this application provides an air handling device, including the impeller as described above. The air handling device includes an air duct, and the impeller is disposed within the air duct.

[0105] The second air outlet 2 is oriented towards the downstream side of the air duct. The air inlet of the second air outlet 2 is connected to the air inlet 31 of the air duct, and the air inlet of the first air outlet 1 is also connected to the air inlet 31 of the air duct. It can be understood that the downstream side of the air duct can be the side of the air duct that is relatively close to the air outlet 35, and the upstream side of the air duct can be the side of the air duct that is relatively close to the air inlet 31.

[0106] By directing the airflow of the second air outlet 2 towards the downstream side of the duct, and connecting its inlet end to the duct inlet 31, while simultaneously connecting the inlet end of the first air outlet 1 to the duct inlet 31, outside air enters through the duct inlet 31 during air handling equipment operation and flows to the second air outlet 2 and the first air outlet 1 respectively. The second air outlet 2 and the first air outlet 1 work together; the second air outlet 2 pushes the air axially, while the first air outlet 1 applies a centrifugal force to the air. This coordinated effort ensures a continuous and stable downstream flow of air, reducing turbulence and chaos within the duct, minimizing energy loss, and improving the stable operation of the air handling equipment.

[0107] The second air outlet 2 is oriented towards the downstream side of the duct, which enables the second air outlet 2 to effectively guide the airflow of the first air outlet 1 to the downstream side of the duct, reducing the direct collision between the airflow of the first air outlet 1 and the duct wall, thereby reducing the energy loss of the airflow and improving the airflow effect. At the same time, it also reduces the whistling sound caused by the local high pressure generated by the direct collision between the airflow of the first air outlet 1 and the duct wall, which causes laminar flow separation, thus reducing wind noise and improving noise quality.

[0108] By connecting the air inlet of the second air outlet 2 to the air inlet 31 of the air duct, the second air outlet 2 can draw air from the air inlet 31, thereby forming an air wall on the outer periphery of the first air outlet 1 and guiding the air outlet of the first air outlet 1.

[0109] In this way, by connecting the air inlet of the first air outlet 1 to the air inlet 31 of the air duct, the first air outlet 1 can stably and smoothly draw in air.

[0110] The air inlet of the second air outlet 2 is located on the outer periphery of the air inlet of the first air outlet 1. Part of the gas from the air inlet 31 of the air duct enters the air inlet of the first air outlet 1 and part of the gas enters the air inlet of the second air outlet 2.

[0111] The centrifugal section can be the first air outlet 1, and the axial flow section can be the second air outlet 2.

[0112] The air outlet of the second air outlet 2 is directed toward the air outlet 35 of the air duct, and the air inlet 31 and air outlet 35 of the air duct are arranged along the axial direction of the impeller.

[0113] By orienting the second air outlet 2 towards the air duct outlet 35, and combining this with the design of the air duct inlet 31 and outlet 35 arranged along the impeller axis, a smooth and efficient airflow path is created within the air duct. When the impeller rotates, the second air outlet 2 pushes the air from the inlet 31 to the outlet 35, reducing gas turning and turbulence. This not only reduces energy loss within the air duct and improves air transmission efficiency, but also allows the air handling equipment to process more air per unit time, enhancing the air purification or conditioning effect. Furthermore, it makes the overall structure of the air handling equipment more compact, saving internal space and providing more possibilities for the installation and layout of other components, facilitating equipment miniaturization and making it more adaptable to different installation environments.

[0114] The air inlet 31 of the air duct is located on the side where the air inlet ends of the second air outlet 2 and the first air outlet 1 are located, and the air outlet 35 of the air duct is located on the other side of the impeller axis away from the air inlet ends of the second air outlet 2 and the first air outlet 1. The second air outlet 2 and the first air outlet 1 are located between the air inlet 31 and the air outlet 35 of the air duct in the axial direction of the impeller, thereby forming a smooth and efficient flow path.

[0115] The air inlet 31 and air outlet 35 of the air duct are arranged roughly opposite each other along the axial direction of the wind turbine.

[0116] In the radial direction of the impeller, there is a flow gap 32 between the second air outlet 2 and the inner wall of the air duct. The flow gap 32 is connected to the air inlet of the second air outlet 2 so that the gas in the flow gap 32 can enter the air inlet of the second air outlet 2.

[0117] A flow gap 32 is provided between the second air outlet 2 and the inner wall of the duct, which allows the second air outlet 2 to make room and reduces the possibility of the second air outlet 2 contacting the inner wall of the duct. The flow gap 32 is connected to the air inlet of the second air outlet 2. When the impeller is running, a negative pressure is formed at the air inlet of the second air outlet 2. This not only draws in air from the air inlet 31 of the duct, but also draws in the return air flowing to the air inlet 31 of the duct through the flow gap 32 into the air inlet of the second air outlet 2. This reduces return air loss, increases the air intake area, and improves airflow performance without occupying extra space. At the same noise level, a larger airflow can be obtained.

[0118] The flow gap 32 is the space in the radial direction of the impeller between the second air outlet 2 and the inner wall of the duct. The flow gap 32 connects the upstream and downstream sides of the flow of the second air outlet 2.

[0119] The air duct includes a first guide section 33, which is located downstream of the second air outlet 2. At least a portion of the first guide section 33 is radially opposite to the first air outlet 1. The inner wall of the first guide section 33 is curved, and the shortest distance between the inner wall of the first guide section 33 and the first air outlet 1 increases progressively in the flow direction. It can be understood that the flow direction can be the macroscopic flow direction of airflow within a channel, gap, or space. For example, if airflow flows within the first guide section 33, the flow direction within the first guide section 33 can be the macroscopic flow direction of the airflow within the first guide section 33, which can be the direction of flow from the second air outlet 2 approximately axially towards the downstream side.

[0120] By setting a first guide section 33, and ensuring that at least a portion of the first guide section 33 is radially opposite to the first air outlet 1, and by making the inner wall of the first guide section 33 arc-shaped, the shortest distance between the inner wall of the first guide section 33 and the first air outlet 1 gradually increases, a guiding effect on the gas can be achieved. The arc-shaped inner wall can guide the gas to flow in close contact, reducing turbulence and energy loss caused by abrupt changes in gas direction. In the flow direction, the shortest distance between the inner wall of the first guide section 33 and the first air outlet 1 gradually increases, and the flow area of ​​the air duct gradually increases, which is conducive to smooth gas flow.

[0121] By making the inner wall of the first guide section 33 an arc surface, the collision and friction between the airflow and the duct wall are reduced. The smooth airflow reduces noise generated during air handling equipment operation, creating a relatively quiet operating environment. Simultaneously, reduced energy loss also lowers the power required to drive the fan, thereby reducing the equipment's energy consumption.

[0122] The air handling equipment includes a motor bracket 4 and a motor assembly 5. The motor assembly 5 is connected to the impeller and is mounted on the motor bracket 4.

[0123] By setting up a motor bracket 4 and a motor assembly 5, and connecting the motor assembly 5 to the wind turbine, power can be provided to the wind turbine, enabling it to rotate at high speed to enhance air transport and processing.

[0124] The motor assembly 5 is fixedly connected to the motor bracket 4, so that the motor bracket 4 provides support for the motor assembly 5, and fixes the position of the motor assembly 5 during operation, thereby maintaining the balance and stable operation of the wind turbine and reducing the wind turbine eccentricity or increased vibration caused by motor shaking.

[0125] As shown in Figure 6, multiple air guide vanes 41 are provided on the motor bracket 4. The multiple air guide vanes 41 are located on the outer periphery of the motor assembly 5 and are located inside the air duct.

[0126] By incorporating the guide vane 41, the gas within the duct can be guided. When air passes around the outer periphery of the motor assembly 5, it is prone to turbulence or irregular flow. The guide vane 41 allows the gas to flow smoothly along the duct, reducing energy loss.

[0127] Multiple guide vanes 41 are evenly arranged along the outer periphery of the motor assembly 5, which enables the gas to flow evenly and makes the gas velocity and pressure in each area of ​​the duct relatively consistent.

[0128] The first guide section 33 is located upstream of the motor bracket 4. The air duct includes a second guide section 34, which is located downstream of the motor bracket 4, with one end of the second guide section 34 extending in a curved manner toward the exhaust port 7 of the air handling unit.

[0129] By placing the first guide section 33 upstream of the motor support 4, the gas can be initially shaped and guided, reducing turbulence and energy loss caused by the collision between the gas and the motor support 4. The second guide section 34, downstream of the motor support 4, continues to guide the airflow. The end of the second guide section 34 away from the motor support 4 bends and extends towards the exhaust port 7, providing guidance for the airflow, enabling it to flow efficiently towards the exhaust port 7, reducing disordered airflow within the equipment, and improving the air delivery efficiency of the entire duct system.

[0130] The first guide section 33 and the second guide section 34 are roughly annular flow channels. Along the axial direction of the impeller, the bending direction of the first guide section 33 is roughly opposite to that of the second guide section 34. That is, along the flow direction, the outer diameter of the annular flow channel formed by the first guide section 33 increases, while the outer and inner diameters of the annular flow channel formed by the second guide section 34 decrease.

[0131] The first guide section 33 and the second guide section 34 are part of the air duct, and the space where the guide vane 41 is located is also part of the air duct.

[0132] The air handling unit includes an electrical control unit 6, which is connected to a motor bracket 4, and a second flow guide section 34 is disposed on the outer periphery of the electrical control unit 6.

[0133] By connecting the electronic control unit 6 to the motor bracket 4, a stable mounting position is provided for the electronic control unit 6. By having the second air guide section 34 surround the outer periphery of the electronic control unit 6, the internal space of the air handling equipment is utilized, reducing the space occupied by various components and making the air handling equipment structure more compact. This facilitates a rational layout of functional modules within a limited space, meeting the air handling equipment's requirements for duct design while providing space for the electronic control unit 6. This also helps promote the miniaturization of the equipment, making the air handling equipment more adaptable to diverse application scenarios.

[0134] The electrical control unit 6 can also be called the electrical control box. The electrical control box can contain electronic components such as controllers, control circuits, and communication modules.

[0135] Specifically, as shown in Figure 5, the electrical control unit 6 is located on the side of the motor bracket 4 away from the wind turbine.

[0136] Air handling equipment refers to air purifiers. Specifically, air purifiers can be small household air purifiers or large industrial air handling units.

[0137] Air handling equipment can also include air purifiers, humidifiers, dehumidifiers, fans, bladeless air purifying fans, etc. Among them, the impeller can be a component in air purifiers, humidifiers, dehumidifiers, fans, and bladeless air purifying fans used to drive airflow.

[0138] Referring to Figure 7, the arrows in Figure 7 schematically indicate the direction of gas flow. During operation, the impeller rotates to create negative pressure, and external air enters the impeller from the axial direction. Part of the airflow enters the first air outlet 1, and part of the airflow enters the second air outlet 2.

[0139] In Figure 7, the two arrows crossing the first air outlet 1 schematically show the direction of airflow through the first air outlet 1. The airflow entering the first air outlet 1 flows into the space between the centrifugal blades under the guidance of the impeller cover 12, and flows between the centrifugal fan blades 11 under the action of the centrifugal fan blades. As the centrifugal fan blades 11 rotate, the airflow is continuously accelerated and thrown out towards the blade tip 111. A hub 13 is provided at the end of the first air outlet 1 furthest from the air inlet. Due to the obstruction of the hub 13, the airflow is blocked and flows towards the blade tip 111 of the centrifugal fan blades 11.

[0140] In Figure 7, the two arrows crossing the second air outlet 2 schematically show the direction of airflow through the second air outlet 2. Some of the air entering the impeller from the outside flows into the second air outlet 2 under the guidance of the impeller cover 12, and flows along the axial direction of the impeller under the action of the axial flow blades, forming a wind wall.

[0141] The airflow discharged from the first air outlet 1 and the airflow discharged from the second air outlet 2 converge on the downstream side. The airflow discharged from the second air outlet 2 pushes the airflow discharged from the first air outlet 1 to change direction, and turns it to the direction of the air outlet 35 of the air duct, reducing the direct collision between the airflow discharged from the first air outlet 1 and the air duct wall, thereby reducing the energy loss of the airflow and reducing wind noise.

[0142] In Figure 7, two arrows extending from the exhaust end of the second air outlet 2 and pointing in a ring towards the air inlet end of the second air outlet 2 schematically indicate the direction of gas flow through the flow gap 32. The flow gap 32 is connected to both the air inlet and exhaust ends of the second air outlet 2. When the impeller is running, a negative pressure is formed at the air inlet end of the second air outlet 2, which not only draws in outside air but also draws in the return air flowing through the flow gap 32 to the air inlet 31 of the air duct into the air inlet end of the second air outlet 2, thereby reducing return air loss and improving airflow performance.

[0143] According to a third aspect of the embodiments of this application, an airflow control method for an air handling device is provided, the method comprising:

[0144] Control the first air outlet 1 to drive the gas flow and form the first airflow.

[0145] The second air outlet 2 is controlled to drive the gas flow and form a second airflow.

[0146] The second airflow is used to change the direction of at least a portion of the airflow in the first airflow, so that at least a portion of the airflow in the first airflow flows toward the air outlet 35 of the air handling equipment.

[0147] By controlling the first air outlet 1 to drive the gas flow and forming a first airflow, and controlling the second air outlet 2 to drive the gas flow and form a second airflow, the second airflow can change the direction of at least part of the first airflow driven by the first air outlet 1. This reduces the direct collision between the air outlet of the first air outlet 1 and the duct wall, thereby reducing energy loss and improving the airflow effect. By reducing the direct collision between the air outlet of the first air outlet 1 and the duct wall, wind noise can also be reduced, noise quality can be optimized, and a relatively quiet operating environment can be created.

[0148] It is understood that in some embodiments, the air handling device may include the impeller described in the above embodiments. The impeller includes the first air outlet 1 and the second air outlet 2. The second airflow is used to change the flow direction of at least a portion of the first airflow, so that at least a portion of the first airflow flows along the axial direction of the impeller. An air outlet 35 of the air handling device is provided along the axial direction of the impeller, thereby allowing at least a portion of the first airflow to flow toward the air outlet 35 of the air handling device. This reduces the direct collision between the air outlet of the first air outlet 1 and the duct wall, thereby reducing energy loss of the air outlet and improving the air outlet effect.

[0149] In some embodiments, the first air outlet 1 and the second air outlet 2 can be arranged adjacent to each other. For example, the second air outlet 2 can be arranged on the adjacent inner side or adjacent outer side of the first air outlet 1 so that the second airflow can be used to change the flow direction of at least a portion of the airflow in the first airflow. In some embodiments, the second air outlet 2 can be arranged on the outer peripheral side of the first air outlet 1, or in some embodiments, the second air outlet 2 can be arranged on the inner peripheral side of the first air outlet 1 so that the second airflow can be used to change the flow direction of at least a portion of the airflow in the first airflow, etc.

[0150] It is understood that the second air outlet 2 is disposed on the outer periphery of the first air outlet 1, which may be the second air outlet 2 being arranged around or partially arranged around the outer periphery of the first air outlet; in some embodiments, the second air outlet 2 may be disposed on the inner periphery of the first air outlet 1, which may be the second air outlet 2 being arranged around or partially arranged around the inner periphery of the first air outlet.

[0151] In some embodiments, the method includes:

[0152] Controlling the first air outlet 1 drives the gas flow to form the first airflow;

[0153] The second air outlet 2 is controlled to drive the gas flow to form a second airflow. The second air outlet 2 is located on the outer periphery of the first air outlet 1.

[0154] The second airflow is used to change the direction of at least a portion of the airflow in the first airflow, so that at least a portion of the airflow in the first airflow flows toward the air outlet 35 of the air handling device.

[0155] By arranging the second air outlet 2 on the outer periphery of the first air outlet 1, and by using the second airflow to change the flow direction of at least a portion of the first airflow so that at least a portion of the first airflow flows toward the air outlet 35 of the air handling device, the second air outlet 2 can effectively drive the air outlet of the first air outlet 1 to change direction, thereby reducing the direct collision between the air outlet of the centrifugal unit and the duct wall, and thus reducing the energy loss of the air outlet and the noise generated.

[0156] As a feasible implementation, the step of controlling the first air outlet 1 to drive the gas flow to form a first airflow and the step of controlling the second air outlet 2 to drive the gas flow to form a second airflow are performed simultaneously. That is, while the first air outlet 1 drives the gas flow to form a first airflow, the second air outlet 2 drives the gas flow to form a second airflow. The first airflow and the second airflow are formed synchronously, so that the second airflow can immediately change the flow direction of at least a portion of the airflow in the first airflow.

[0157] As another feasible implementation, the steps of controlling the first air outlet 1 to drive the gas flow to form a first airflow and controlling the second air outlet 2 to drive the gas flow to form a second airflow are not performed synchronously. The first air outlet 1 can be controlled first to drive the gas flow to form the first airflow, and then the second air outlet 2 can be controlled to drive the gas flow to form the second airflow. Alternatively, the second air outlet 2 can be controlled first to drive the gas flow to form the second airflow, and then the first air outlet 1 can be controlled to drive the gas flow to form the first airflow. This also enhances the ability to change the flow direction of at least a portion of the first airflow through the second airflow.

[0158] It is understood that the subject executing the above control method may be a processing device or controller installed in the main body of the air handling equipment, or it may be a terminal device or cloud processor that is electrically or communicatively connected to the air handling equipment.

[0159] According to a fourth aspect of the embodiments of this application, a wind turbine is provided, including a centrifugal section and an axial flow section, the centrifugal section and the axial flow section being used to drive gas flow, wherein the air outlet path of the centrifugal section and the air outlet path of the axial flow section intersect.

[0160] By aligning the air outlet paths of the centrifugal section and the axial section, the airflow from the axial section can redirect the airflow from the centrifugal section, reducing direct collisions between the centrifugal section's airflow and the duct wall. This reduces energy loss and improves airflow performance. Furthermore, minimizing direct collisions between the centrifugal section's airflow and the duct wall also reduces wind noise, optimizing noise levels and creating a quieter operating environment.

[0161] In some embodiments, the centrifugal section and the axial flow section can be arranged adjacent to each other. For example, the axial flow section can be arranged on the adjacent inner side or adjacent outer side of the centrifugal section so that the second airflow can be used to change the flow direction of at least a portion of the airflow in the first airflow. In some embodiments, the axial flow section can be arranged on the outer peripheral side of the centrifugal section, or in some embodiments, the axial flow section can be arranged on the inner peripheral side of the centrifugal section so that the second airflow can be used to change the flow direction of at least a portion of the airflow in the first airflow, etc.

[0162] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0163] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely implementation methods of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A wind turbine, comprising a first air outlet (1) and a second air outlet (2), wherein the first air outlet (1) is used to drive gas flow to generate a first airflow, and the second air outlet (2) is used to drive gas flow to generate a second airflow, wherein the second airflow is used to change the flow direction of at least a portion of the airflow in the first airflow.

2. The wind wheel of claim 1, wherein, The second air outlet (2) is disposed on the outer periphery of the first air outlet (1), and the air outlet path of the first air outlet (1) intersects with the air outlet path of the second air outlet (2) so that at least a portion of the first airflow flows along the axial direction of the impeller.

3. The wind wheel of claim 1, wherein, The first air outlet (1) includes a centrifugal section, and the air outlet direction is the centrifugal direction of the impeller; the second air outlet (2) includes an axial section, and the air outlet direction is the axial direction of the impeller, so that at least a portion of the airflow in the second airflow is parallel to the axial direction of the impeller.

4. The wind wheel of claim 3, wherein, The centrifugal section includes a plurality of centrifugal fan blades (11), which are arranged circumferentially along the impeller, and the axial flow section is connected to the centrifugal fan blades (11).

5. The wind wheel of claim 4, wherein, The axial flow section extends into a ring and is sleeved on the outer periphery of the centrifugal section. The axial flow section is connected to the tip (111) of the centrifugal fan blade (11).

6. The wind wheel of claim 4, wherein, The axial flow section includes an inner ring plate (22) and a plurality of axial flow blades (21). The inner ring plate (22) is connected to the centrifugal blades (11). The plurality of axial flow blades (21) are connected to the side of the inner ring plate (22) away from the centrifugal blades (11) and are arranged along the circumference of the impeller.

7. The wind wheel of claim 6, wherein, The centrifugal section also includes an annular impeller cover (12), which is connected to the tip (111) of the plurality of centrifugal fan blades (11) near the air inlet end of the first air outlet (1) and extends along the flow direction of the first airflow to the inner ring plate (22).

8. The wind wheel of claim 7, wherein, The diameter of the impeller cover (12) gradually increases along the direction of the first airflow.

9. The wind wheel of claim 4, wherein, The axial flow section includes an outer ring plate (23), and the end of the axial flow fan blade (21) away from the centrifugal fan blade (11) is connected to the outer ring plate (23).

10. The wind wheel of claim 1, wherein, The wind turbine also includes a hub (13), the center of which is connected to the motor shaft; The first fan blade of the first air outlet (1) is connected to the hub (13) and extends outward toward the center of the hub (13); The second fan blade of the second air outlet (2) is disposed around the periphery of the first fan blade and is spaced apart from the hub (13); When the motor shaft rotates, the airflow generated by the second fan blade at least partially guides the direction of the airflow generated by the first fan blade.

11. The wind wheel of claim 5, wherein, The end of the blade tip (111) near the air inlet end of the centrifugal section is the first end (1111), and the end away from the air inlet end of the centrifugal section is the second end (1112). The second end (1112) is located downstream of the air outlet direction of the axial flow section. In the axial direction of the wind turbine, the distance between the axial flow section and the first end (1111) is less than the distance between the axial flow section and the second end (1112); or, the axial flow section is disposed on the first end (1111).

12. The wind wheel of claim 1, wherein, The first air outlet (1) and the second air outlet (2) are an integral structure.

13. The wind wheel of claim 1, wherein, The first air outlet (1) and the second air outlet (2) are coaxially arranged.

14. An air handling apparatus, comprising a fan impeller as described in any one of claims 1-13; The air handling equipment includes an air duct, and the impeller is disposed within the air duct.

15. The air treatment device of claim 14, wherein, The air outlet of the second air outlet (2) is directed towards the downstream side of the air duct. The air inlet of the second air outlet (2) is connected to the air inlet (31) of the air duct. The air inlet of the first air outlet (1) is connected to the air inlet (31) of the air duct.

16. The air handling apparatus according to claim 15, wherein, The air outlet of the second air outlet (2) is directed toward the air outlet (35) of the air duct, and the air inlet (31) and the air outlet (35) of the air duct are arranged approximately along the axial direction of the impeller.

17. The air handling apparatus according to claim 14, wherein, In the radial direction of the impeller, there is a flow gap (32) between the second air outlet (2) and the inner wall of the air duct. The flow gap (32) is connected to the air inlet of the second air outlet (2) so that the gas in the flow gap (32) can enter the air inlet of the second air outlet (2).

18. The air handling apparatus according to claim 14, wherein, The air duct includes a first guide section (33), which is located downstream of the second air outlet (2). At least a portion of the first guide section (33) is arranged opposite to the first air outlet (1) in the radial direction of the impeller. The inner wall of the first guide section (33) is an arc surface, and in the flow direction, the shortest distance between the inner wall of the first guide section (33) and the first air outlet (1) increases progressively.

19. The air handling apparatus according to claim 18, wherein, The air handling equipment includes a motor bracket (4) and a motor assembly (5), the motor assembly (5) being connected to the impeller and mounted on the motor bracket (4); The motor bracket (4) is provided with a plurality of air guide vanes (41), which are arranged on the outer periphery of the motor assembly (5) and are located in the air duct; The first guide section (33) is located on the upstream side of the motor bracket (4); The air duct includes a second guide section (34), which is located downstream of the motor bracket (4). The end of the second guide section (34) away from the motor bracket (4) bends and extends toward the exhaust port (7) of the air handling equipment. The air handling equipment includes an electrical control unit (6), which is connected to the motor bracket (4), and the second flow guide section (34) is disposed on the outer periphery of the electrical control unit (6).

20. An airflow control method for an air handling device, the method comprising: Control the first air outlet (1) to drive the gas flow and form the first airflow; Control the second air outlet (2) to drive the gas flow and form a second airflow; The second airflow is used to change the direction of at least a portion of the airflow in the first airflow, so that at least a portion of the airflow in the first airflow flows toward the air outlet (35) of the air handling device.

21. A fan impeller, comprising a centrifugal section and an axial flow section, wherein the centrifugal section and the axial flow section are used to drive gas flow, and the air outlet path of the centrifugal section intersects with the air outlet path of the axial flow section.

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