A wind wheel structure with mixed wind blades and an air purifier
By adding inclined axial flow blades to the outer periphery of the centrifugal impeller and connecting reinforcing ribs, a hybrid impeller is formed, which solves the problem of insufficient air volume in air purifiers, and improves wind pressure and air volume, while keeping the product size unchanged.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN VORK HEALTH IND CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-21
AI Technical Summary
When existing air purifiers use centrifugal impellers to deliver air, there is a problem of insufficient air volume. Directly increasing the rotation speed or increasing the impeller diameter is costly and impractical. It is necessary to increase the air pressure and air volume without changing the product size.
Design a hybrid impeller structure that combines a centrifugal impeller and an axial impeller. The axial impeller is fixed to the outer periphery of the centrifugal impeller to form a hybrid impeller. An additional axial impeller is added outside the centrifugal air outlet. The axial impeller is inclined to the rotation center axis. Adjacent impellers are connected by reinforcing ribs to form a solid whole.
Without changing the product size, the wind pressure and air volume are significantly improved. The wind pressure and air volume output by the impeller are both improved, and the structural reliability is enhanced.
Smart Images
Figure CN224533064U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wind turbine technology, specifically to a wind turbine structure with hybrid blades and an air purifier. Background Technology
[0002] Generally, air blowers are classified into two types based on the direction of airflow through the blades: centrifugal blowers and axial blowers. Centrifugal blowers use centrifugal impellers, where airflow enters along the impeller's axis and then radially exits outwards perpendicular to the axis. They primarily utilize centrifugal effect to pressurize the fluid, thus generating higher pressure and exhibiting characteristics of low airflow and high pressure. Axial blowers use axial impellers, where airflow enters along the impeller's axis and exits directly through the blades along the impeller's axis. Therefore, when the blades rotate, both sides of the blades form an intake surface and a pressure surface to drive the airflow. This results in lower pressure, but due to the large effective area, it has a higher flow rate and exhibits characteristics of high airflow and low pressure.
[0003] While existing air purifiers using centrifugal impellers meet air pressure requirements, they generally suffer from insufficient airflow. To increase airflow, the most direct methods are to increase the rotational speed or the impeller diameter. However, increasing the rotational speed requires a more expensive high-speed motor, and proportionally increasing the impeller diameter results in a poor increase in airflow. Furthermore, proportionally enlarging the impeller would render the product unsuitable, necessitating an increase in the product's size. Therefore, it is necessary to design an impeller structure that effectively improves both air pressure and airflow while maintaining a constant rotational speed, and this impeller structure must also be as compatible as possible with existing products. Utility Model Content
[0004] To address the aforementioned problems, this invention provides a hybrid impeller structure and an air purifier.
[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:
[0006] A hybrid impeller structure includes a centrifugal impeller module and multiple axial flow impellers. The centrifugal impeller module has an axially arranged negative pressure air inlet, a centrifugal air outlet connected to the negative pressure air inlet and arranged circumferentially, and multiple centrifugal impellers evenly arranged at the centrifugal air outlet. The multiple axial flow impellers are arranged outside the centrifugal air outlet of the centrifugal impeller module and fixedly connected to the centrifugal impellers.
[0007] Furthermore, the centrifugal impeller module includes an impeller base plate, an impeller cover plate, and multiple centrifugal fan blades. The impeller base plate and the impeller cover plate are spaced apart, and the multiple centrifugal fan blades are connected between the impeller base plate and the impeller cover plate and are evenly arranged in the circumferential direction. The negative pressure air inlet is opened at the center of the impeller cover plate, and the peripheral openings of the spaced-apart impeller base plate and impeller cover plate form the centrifugal air outlet.
[0008] Furthermore, the centrifugal impeller module is an integrally connected structure.
[0009] Furthermore, a connecting shaft hole is provided at the center of the impeller base plate.
[0010] Furthermore, adjacent axial flow blades are connected by reinforcing ribs.
[0011] Furthermore, the inner and outer edges of adjacent axial flow blades are connected by the reinforcing ribs.
[0012] Furthermore, the axial flow fan blades are inclined to the rotation center axis of the centrifugal fan module, and the axial flow fan blades are arc-shaped, with the arc-shaped protrusions facing the negative pressure air inlet.
[0013] Furthermore, the inner edge of the middle part of the axial flow fan blade is fixedly connected to the outer edge of the centrifugal fan blade.
[0014] Furthermore, the centrifugal impeller module is a backward-inclined centrifugal impeller module.
[0015] An air purifier includes a purifier body and a fan wheel disposed within the purifier body, wherein the fan wheel is a fan wheel structure with hybrid fan blades as described above.
[0016] Furthermore, the purifier body is provided with an annular ventilation duct connecting the impeller mounting cavity and the impeller mounting cavity in sequence in the height direction; the impeller is assembled in the impeller mounting cavity, and the axial flow fan blades on the outer periphery correspond to the annular ventilation duct.
[0017] The technical solution provided by this utility model has the following beneficial effects:
[0018] The hybrid impeller structure provided in this application is equivalent to adding an axial flow impeller outside the circumferential centrifugal outlet of the original centrifugal impeller. When rotating, the axial flow impeller draws in the air in front to form an axial airflow. At the same time, the centrifugal airflow blown radially out by the centrifugal impeller module also flows to the axial flow impeller and is further driven by the axial flow impeller, so that the wind pressure and air volume of the wind impeller output are significantly improved.
[0019] Meanwhile, this application simply adds axial flow blades to the outer periphery of the centrifugal impeller module. The axial flow blades are directly fixed to the centrifugal impeller. In this way, although the radial outer diameter of the impeller will increase, the axial dimension will be smaller, making it more suitable for use in the original product without requiring any modifications to the original product.
[0020] Furthermore, the axial flow fan blades are fixedly connected to the centrifugal fan blades; and adjacent axial flow fan blades are connected by reinforcing ribs, so that multiple axial flow fan blades can form a solid whole, making the wind turbine more reliable. Attached Figure Description
[0021] Figure 1 The image shown is a three-dimensional schematic diagram of the wind turbine structure with hybrid blades in the embodiment. Figure 1 ;
[0022] Figure 2 The image shown is a side view of the wind turbine structure with hybrid blades in the embodiment.
[0023] Figure 3 As shown Figure 2 Sectional view of line AA in the middle;
[0024] Figure 4 The image shown is a three-dimensional schematic diagram of the wind turbine structure with hybrid blades in the embodiment. Figure 2 ;
[0025] Figure 5 The image shown is a three-dimensional schematic diagram of the wind turbine structure with hybrid blades in the embodiment. Figure 3 ;
[0026] Figure 6 The figure shown is a comparison of wind tunnel experimental data between the hybrid blade wind turbine structure in the embodiment and the existing backward-curved centrifugal blade wind turbine.
[0027] Figure 7 The diagram shown is a structural schematic of the air purifier in the embodiment. Detailed Implementation
[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0029] In the description of this utility model, terms such as "upper", "lower", "left", "right", "front", and "rear" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, 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 utility model.
[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.
[0031] Reference Figures 1 to 5 As shown, this embodiment provides a hybrid impeller structure, including a centrifugal impeller module 10 and multiple axial flow impellers 20. The centrifugal impeller module 10 has an axially arranged negative pressure air inlet 101, a centrifugal air outlet 102 connected to the negative pressure air inlet 101 and arranged circumferentially, and multiple centrifugal impellers 13 evenly arranged at the centrifugal air outlet 102. For better illustration, in this embodiment, the direction of the negative pressure air inlet 101 is defined as forward, and the direction away from the negative pressure air inlet 101 is defined as backward. When the centrifugal impeller module 10 rotates along its rotation center axis a, under the action of the centrifugal impellers 13, air is drawn in through the negative pressure air inlet 101 and blown out radially outward through the circumferentially arranged centrifugal air outlet 102, forming a centrifugal airflow. Thus, the centrifugal impeller module 10 can be understood as the structure of a centrifugal impeller in the prior art, specifically a backward-inclined centrifugal impeller.
[0032] Multiple axial fan blades 20 are arranged outside the centrifugal outlet 102 of the centrifugal impeller module 10 and fixedly connected to the centrifugal fan blades 13; this is equivalent to adding axial fan blades 20 outside the circumferential centrifugal outlet 102 on the basis of the original centrifugal impeller. When rotating, the axial fan blades 20 draw in the air from the front and blow it out to the rear to form an axial airflow. At the same time, the centrifugal airflow blown radially out of the centrifugal impeller module 10 also flows to the axial fan blades 20 and is further driven by the axial fan blades 20. After being driven by the axial fan blades 20, the centrifugal airflow will change its direction, that is, it will cause the overall airflow to tilt and blow out to the rear. Figure 3 As shown, this significantly improves both the air pressure and air volume output by the wind turbine.
[0033] like Figure 6 As shown, the impeller structure using the hybrid blades of this application is compared with a conventional centrifugal impeller. The hybrid blade impeller refers to the hybrid blade impeller structure of this embodiment; the backward-curved centrifugal blade impeller is the control group, which is the structure of the aforementioned individual centrifugal impeller module 10, and can also be called a backward-curved centrifugal impeller. Figure 6As shown, at the same rotational speed of 1600 rpm, the PQ curves of the two wind turbines were measured using a wind tunnel testing platform. The static pressure and air volume of the hybrid blade wind turbine (i.e., the hybrid blade wind turbine structure of this application) were both higher than those of the backward-curved centrifugal blade wind turbine. That is, the wind pressure and air volume of the wind turbine structure of this application are significantly improved.
[0034] Furthermore, such as Figure 2 As shown, this application simply adds an axial flow vane 20 to the outer periphery of the centrifugal impeller module 10. The axial flow vane 20 is directly fixed to the centrifugal vane 13. While this increases the radial outer diameter of the impeller, the axial dimension is smaller; that is, the axial dimension L1 of the axial flow vane 20 is smaller than the axial dimension L2 of the centrifugal impeller module 10. This design allows the impeller of this application to be better suited for use in existing products without requiring modifications (see details...). Figure 7 (Description).
[0035] Furthermore, adjacent axial flow blades 20 are connected by reinforcing ribs 21, so that multiple axial flow blades 20 can form a solid whole, making the wind turbine more reliable.
[0036] Specifically, the centrifugal impeller module 10 includes an impeller base plate 11, an impeller cover plate 12, and a plurality of centrifugal fan blades 13. The impeller base plate 11 and the impeller cover plate 12 are spaced apart, and the plurality of centrifugal fan blades 13 are connected between the impeller base plate 11 and the impeller cover plate 12 and are evenly arranged in the circumferential direction. The negative pressure air inlet 101 is opened at the center of the impeller cover plate 12, and the peripheral openings of the spaced-apart impeller base plate 11 and the impeller cover plate 12 form the centrifugal air outlet 102. Furthermore, the centrifugal impeller module 10 is an integrally connected structure, such as being integrally formed by injection molding. Of course, in other embodiments, the impeller base plate 11, impeller cover plate 12, and centrifugal fan blades 13 can also be connected by assembly.
[0037] The impeller base plate 11 has a connecting shaft hole 111 at its center, which is used to connect an external drive shaft, such as the drive shaft of an external motor.
[0038] The axial flow fan blade 20 is inclined to the rotation center axis a of the centrifugal fan module 10. The axial flow fan blade 20 is an arc-shaped fan blade, and the arc-shaped protrusion faces the negative pressure air inlet 101. In this way, axial airflow can be better formed.
[0039] The number of centrifugal fan blades 13 and axial fan blades 20 is the same, and there are nine of each in this embodiment; the centrifugal fan blades 13 and axial fan blades 20 correspond one-to-one and are connected.
[0040] The inner edge of the axial flow fan blade 20 is fixedly connected to the outer edge of the centrifugal fan blade 13, resulting in more uniform stress distribution. Simultaneously, the inner and outer edges of adjacent axial flow fan blades 20 are connected by reinforcing ribs 21. Thus, with both the inner and outer sides connected by reinforcing ribs 21, multiple axial flow fan blades 20 form a ring-shaped integral connection structure, which then forms a multi-point fixed fit with the centrifugal impeller module 10, further enhancing the stability of the axial flow fan blades 20.
[0041] The above discloses one preferred structure of the axial flow fan blade 20. Of course, in other embodiments, the structure and connection method of the axial flow fan blade 20 are not limited to this. For example, the number of axial flow fan blades 20 may be less than that of centrifugal fan blades 13. The reinforcing rib 21 may be connected to the outer edge of adjacent axial flow fan blades 20 individually, or the reinforcing rib 21 may be connected to the middle position of the beginning and end of adjacent axial flow fan blades 20 individually. Alternatively, when the fixing structure of the axial flow fan blade 20 and the centrifugal fan blade 13 can sufficiently support the stability of the axial flow fan blade 20, the connection structure of the reinforcing rib 21 may not be used.
[0042] Specifically, the centrifugal impeller module 10 is a backward-inclined centrifugal impeller, which has the characteristics of high efficiency and low noise, and is one of the preferred solutions. Of course, it is not limited to this in other embodiments.
[0043] Reference Figure 7 As shown, this embodiment also provides an air purifier, including a purifier body 100 and a fan wheel 200 disposed within the purifier body 100, wherein the fan wheel 200 is a hybrid fan wheel structure as described above. This allows the air purifier to simultaneously possess high air pressure and airflow to meet practical needs.
[0044] In this embodiment, the purifier body 100 is provided with a fan mounting cavity 101 and an annular ventilation duct 102 connecting the fan mounting cavity 101 in the height direction; the fan 200 is assembled in the fan mounting cavity 101, that is, the axial direction of the fan is the height direction of the purifier body, the front end of the fan 200 faces down and the rear end faces up; the axial flow fan blades 20 on the outer periphery of the fan 200 correspond to the annular ventilation duct 102; the airflow generated by the rotation of the fan 200 blows toward the annular ventilation duct 102 and blows out from the annular ventilation duct 102.
[0045] The air purifier uses the aforementioned impeller 200. An upwardly extending guide plate 103 is provided on the side wall of the impeller mounting cavity 101. Simultaneously, when the impeller 200 rotates, it blows out an upward-sloping airflow. This airflow, further guided by the guide plate 103, can more smoothly enter the annular ventilation duct 102. Furthermore, the outer side of the impeller 200 (i.e., the axial flow blade 20) has a small axial dimension and will not interfere with the original guide plate 103. Therefore, the impeller 200 can be directly fitted into the existing purifier body 100 without requiring redesign of the purifier body 100, saving costs.
[0046] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.
Claims
1. A wind turbine structure with hybrid blades, characterized in that: It includes a centrifugal impeller module and multiple axial flow fan blades. The centrifugal impeller module has an axially arranged negative pressure air inlet, a centrifugal air outlet connected to the negative pressure air inlet and arranged circumferentially, and multiple centrifugal fan blades evenly arranged at the centrifugal air outlet. The multiple axial flow fan blades are arranged outside the centrifugal air outlet of the centrifugal impeller module and fixedly connected to the centrifugal fan blades.
2. The wind turbine structure with hybrid blades according to claim 1, characterized in that: The centrifugal impeller module includes an impeller base plate, an impeller cover plate, and multiple centrifugal blades. The impeller base plate and the impeller cover plate are spaced apart, and the multiple centrifugal blades are connected between the impeller base plate and the impeller cover plate and are evenly arranged in the circumferential direction. The negative pressure air inlet is opened in the center of the impeller cover plate, and the peripheral openings of the spaced-apart impeller base plate and impeller cover plate form the centrifugal air outlet.
3. The wind turbine structure with hybrid blades according to claim 1 or 2, characterized in that: The centrifugal impeller module is an integrally connected structure.
4. The wind turbine structure with hybrid blades according to claim 1, characterized in that: Adjacent axial flow blades are connected by reinforcing ribs.
5. The wind turbine structure with hybrid blades according to claim 4, characterized in that: The inner and outer edges of adjacent axial flow blades are connected by the reinforcing ribs.
6. The wind turbine structure with hybrid blades according to claim 1, characterized in that: The axial flow fan blades are inclined to the rotation center axis of the centrifugal fan module. The axial flow fan blades are arc-shaped, and the arc-shaped protrusions face the negative pressure air inlet.
7. The wind turbine structure with hybrid blades according to claim 1 or 6, characterized in that: The inner edge of the middle part of the axial flow fan blade is fixedly connected to the outer edge of the centrifugal fan blade.
8. The wind turbine structure with hybrid blades according to claim 1, characterized in that: The centrifugal impeller module is a backward-inclined centrifugal impeller module.
9. An air purifier, comprising a purifier body and a fan wheel disposed within the purifier body, characterized in that: The wind turbine is the wind turbine structure with hybrid blades as described in any one of claims 1 to 8.
10. The air purifier according to claim 9, characterized in that: The purifier body has an annular ventilation duct with a fan wheel mounting cavity and a connecting fan wheel mounting cavity arranged sequentially in the height direction; the fan wheel is assembled in the fan wheel mounting cavity, and the axial flow fan blades on the outer periphery correspond to the annular ventilation duct.