High-speed booster fan module

Abstract

A high-speed booster fan module, comprising an air duct (3), and an air inlet (31) and an air outlet (32), which communicate with the air duct (3), wherein a driving fan blade group (4) is provided in the air duct (3), and the driving fan blade group (4) drives air at the air inlet (31) to flow into the air duct (3) and then be blown out from the air outlet (32); a boosting mechanism is provided at the air outlet (32); a flow deflector (2) is provided on the side of the boosting mechanism away from the driving fan blade group (4); and a rectifying and boosting hood (1) is provided on the side of the flow deflector (2) away from the boosting mechanism. An airflow is boosted and accelerated under the cooperation of the driving fan blade group (4) and the boosting mechanism, and then the airflow is guided by means of the flow deflector (2) to concentrate and converge, so that the utilization rate of the airflow is effectively increased; and finally, the airflow is subjected to secondary boosting and turbulence elimination by means of the rectifying and boosting hood (1) and is then blown out, thereby significantly increasing an air speed and an air supply distance and also achieving the effects of silencing and noise reduction.

Description

A high-speed booster fan module Technical Field

[0001] This utility model relates to the field of fan technology, specifically a high-speed booster fan module. Background Technology

[0002] When going out or engaging in outdoor activities in the summer, the weather is quite hot, and there may be situations where there is no air conditioning. In order to make it convenient to cool off at any time, portable fans have emerged and are widely popular because they are easy to carry and can be used anytime.

[0003] However, due to its small size, the electrical components it is equipped with can only use low power. Therefore, traditional portable fans cannot be designed to have a large airflow, resulting in poor cooling effect. Although some manufacturers have applied the structure of traditional booster fans to these small portable fans to increase airflow and improve cooling effect, such as Chinese patent (authorization announcement number: CN217029352U), they did not take into account the problem of airflow turbulence, resulting in very loud noise during operation, which seriously affects the user experience and is not conducive to the widespread application of the product. Utility Model Content

[0004] The purpose of this invention is to provide a high-speed booster fan module. The airflow is boosted and accelerated by the cooperation of the fan blade assembly and the booster mechanism. Then, the airflow is guided by the guide component to concentrate and converge, effectively improving the utilization rate of the airflow. Finally, it is boosted again by the rectifier and booster shroud and blown outward after turbulence removal. This not only greatly improves the wind speed and air delivery distance, but also achieves the effect of quiet operation and noise reduction, solving the problems mentioned in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-speed booster fan module, including an air duct and an air inlet and an air outlet connected to the air duct. A drive fan blade assembly is provided inside the air duct. The drive fan blade assembly drives air located at the air inlet to flow into the air duct and then blows it outward from the air outlet. A booster mechanism is provided at the air outlet. A guide component is provided on the side of the booster mechanism away from the drive fan blade assembly. A rectifier booster cover is provided on the side of the guide component away from the booster mechanism. The booster mechanism boosts the airflow delivered by the drive fan blade assembly. The guide component guides the airflow output from the booster mechanism so that the airflow is blown out in a direction parallel to the axial direction. The rectifier booster cover boosts the airflow output from the guide component, removes turbulence, and then blows it outward.

[0006] Preferably, the pressurization mechanism includes multiple air-cutting pressurization blades disposed at the air outlet. The multiple air-cutting pressurization blades are arranged at uniform intervals around the air outlet to form an annular pressurization duct. The annular pressurization duct is coaxially disposed with the drive fan blade assembly. The drive fan blade assembly includes a rotating base and drive blades uniformly disposed on the outer peripheral wall of the rotating base. The axial projection area of ​​the drive blades is located outside the projection area of ​​the rotating base and overlaps with the projection area of ​​the annular pressurization duct.

[0007] Preferably, the surface of the wind-cutting and pressurizing blade facing the outside of the air outlet is the wind-receiving surface, and the surface of the wind-driving blade facing the side of the wind-cutting and pressurizing blade is the wind-driving surface. During the rotation of the wind-driving fan blade assembly, the curved surfaces of the wind-receiving surface and the wind-driving surface in the same radial region intersect, and the included angle θ1 between the wind-receiving surface and the wind-driving surface is less than 90°.

[0008] Preferably, the included angle θ2 between the wind-receiving surface and the central axis of the drive fan blade assembly satisfies: 30° < θ2 < 60°.

[0009] Preferably, the angle θ2 between the wind-receiving surface and the central axis of the drive fan blade assembly is 45°.

[0010] Preferably, the guide includes an annular cover and a blade base coaxially arranged with the annular cover. The circumferential portion of the blade base extends outward to form a guide blade. The end of the guide blade away from the blade base is connected to the inner wall of the annular cover. The guide blade is arranged parallel to the central axis of the drive fan blade assembly. The area where the guide blade is located covers the air outlet.

[0011] Preferably, the blade base is provided with a pressure relief protrusion on the side away from the air outlet.

[0012] Preferably, the pressure relief protrusion is a hemisphere.

[0013] Preferably, both ends of the rectifier booster cover are open, and the inner diameter of the rectifier booster cover decreases radially from the flow guide to the side away from the flow guide.

[0014] Preferably, the inner wall of the rectifier booster cover is cylindrical, the inner diameter of the rectifier booster cover is not less than the inner diameter of the guide component, and the length of the rectifier booster cover is not less than 15mm.

[0015] Preferably, a motor base is provided at the center of the air outlet axis, and the drive fan blade assembly includes a drive motor, which is mounted on the motor base and located inside the air duct.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, the airflow is pressurized and accelerated by the cooperation of the drive fan blade assembly and the pressurization mechanism. Then, the airflow is guided by the guide component to concentrate and converge, which effectively improves the utilization rate of the airflow. Finally, it is pressurized again by the rectifier pressurization shroud and blown outward after turbulence removal. This not only greatly improves the wind speed and air delivery distance, but also achieves the effect of quiet noise reduction. Attached Figure Description

[0018] Figure 1 is an exploded view of the structure of this utility model;

[0019] Figure 2 is an exploded view of the structure of this utility model.

[0020] Figure 3 is a schematic diagram of the structure of this utility model;

[0021] Figure 4 is a schematic diagram of the structure of this utility model (II);

[0022] Figure 5 is a cross-sectional orientation diagram of this utility model;

[0023] Figure 6 is a cross-sectional view of the present invention.

[0024] In the diagram: 1. Rectifier and booster shroud; 2. Guide vane; 21. Ring shroud; 22. Blade base; 23. Guide vane; 24. Pressure relief protrusion; 3. Air duct; 31. Air inlet; 32. Air outlet; 33. Motor base; 34. Air cutting and booster blades; 35. Air receiving surface; 4. Drive fan blade assembly; 41. Rotary base; 42. Drive blades; 43. Drive surface; 44. Drive motor. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please refer to Figures 1-6. A high-speed booster fan module includes an air duct 3 and an air inlet 31 and an air outlet 32 ​​connected to the air duct 3. A drive fan blade assembly 4 is disposed within the air duct 3. A motor base 33 is disposed at the axis of the air outlet 32. The drive fan blade assembly 4 includes a drive motor 44, which is mounted on the motor base 33 and located inside the air duct 3. The drive fan blade assembly 4 drives the air located at the air inlet 31 to flow into the air duct 3 and then blows it outward from the air outlet 32. A pressurizing mechanism is provided at the air outlet 32. A guide 2 is provided on the side of the pressurizing mechanism away from the drive fan blade assembly 4. A rectifier pressurizing shroud 1 is provided on the side of the guide 2 away from the pressurizing mechanism. The pressurizing mechanism pressurizes the airflow delivered by the drive fan blade assembly 4. The guide 2 guides the airflow output from the pressurizing mechanism so that the airflow is blown out in a direction parallel to the axial direction. The rectifier pressurizing shroud 1 pressurizes the airflow output from the guide 2, removes turbulence, and blows it outward.

[0027] The pressurization mechanism includes multiple air-cutting pressurization blades 34 disposed at the air outlet 32. The multiple air-cutting pressurization blades 34 are arranged at uniform intervals around the air outlet 32 ​​to form an annular pressurization duct. The annular pressurization duct is coaxially arranged with the drive fan blade assembly 4. The drive fan blade assembly 4 includes a rotating base 41 and drive blades 42 evenly arranged on the outer peripheral wall of the rotating base 41. The axial projection area of ​​the drive blades 42 is located outside the projection area of ​​the rotating base 41 and overlaps with the projection area of ​​the annular pressurization duct. The overlapping projection areas ensure that the airflow of the drive blades 42 is received to the maximum extent by the air-cutting pressurization blades 34, thereby avoiding excess airflow from other directions acting on the airflow bundle and causing unnecessary turbulence in the airflow. The surface of the wind-cutting and pressurizing blade 34 facing the outside of the air outlet 32 ​​is the wind-receiving surface 35, and the surface of the wind-driving blade 42 facing the side of the wind-cutting and pressurizing blade 34 is the wind-driving surface 43. During the rotation of the wind-driving fan blade assembly 4, the curved surfaces of the wind-receiving surface 35 and the wind-driving surface 43, which are in the same radial region, intersect, and the included angle θ1 between the wind-receiving surface 35 and the wind-driving surface 43 is less than 90°. Within this angle, the wind-driving surface 43 and the wind-receiving surface 35 can achieve the sandwich pressurizing effect, and the pressurizing effect is optimal when θ1 = 45°. The included angle θ2 between the wind-receiving surface 35 and the central axis of the wind-driving fan blade assembly 4 satisfies: 30° < θ2 < 60°, and when the included angle θ2 between the wind-receiving surface 35 and the central axis of the wind-driving fan blade assembly 4 is 45°, the direction of the airflow reflected by the wind-receiving surface 35 is most parallel to the central axis of the wind-driving fan blade assembly 4, which is also the angle with the best axial airflow efficiency.

[0028] The flow guide 2 includes a ring cover 21 and a blade base 22 coaxially arranged with the ring cover 21. The circumferential portion of the wall of the blade base 22 extends outward to form a flow guide blade 23. The end of the flow guide blade 23 away from the blade base 22 is connected to the inner wall of the ring cover 21. The flow guide blade 23 is arranged parallel to the central axis of the drive fan blade assembly 4. The area where the flow guide blade 23 is located covers the air outlet 32.

[0029] A pressure relief protrusion 24 is provided on the side of the blade base 22 away from the air outlet 32. The pressure relief protrusion 24 is hemispherical. When the high-speed airflow is blown out from the gap between the guide vanes 23, a high-pressure vacuum zone will be formed at the blade base 22 which is surrounded by the guide vanes 23. Although the high-pressure vacuum zone is formed by the high-speed airflow, it will also generate a back suction force on the high-speed airflow around it. This back suction force will cause a certain turbulence phenomenon in the high-speed airflow, thereby affecting the air outlet efficiency and increasing the airflow noise. Therefore, the setting of the pressure relief protrusion 24 can effectively reduce the existence of the vacuum zone and avoid the adverse effects caused therefrom to the greatest extent.

[0030] The rectifier and booster shroud 1 is open at both ends. The inner diameter of the rectifier and booster shroud 1 is radially reduced from the guide member 2 toward the side away from the guide member 2. The radially reduced rectifier and booster shroud 1 can further compress the airflow in the radial direction, which can not only increase the speed and pressure, but also eliminate some turbulence by increasing the circumferential pressure of the airflow bundle, thereby achieving the effect of turbulence elimination and noise reduction. In another embodiment, the inner wall of the rectifier and booster shroud 1 can be set as a circular tube. The inner diameter of the rectifier and booster shroud 1 is not less than the inner diameter of the guide member 2, and the length of the rectifier and booster shroud 1 is not less than 15mm. The circular tube rectifier and booster shroud 1 with a certain length coefficient can also eliminate some turbulence and achieve the effect of turbulence elimination and noise reduction.

[0031] The high-speed booster fan module of this application can be connected to an external control circuit and power supply, so that the drive motor 44 can independently perform the blowing operation under the control of the control circuit. It can also be regarded as a functional module. When it is assembled with fan hardware, it can replace the air duct and drive fan blade assembly of a conventional fan, thereby converting the conventional fan into a high-speed booster fan.

[0032] In summary, this utility model achieves increased pressure and speed through the cooperation of the drive fan blade assembly 4 and the pressurization mechanism. The airflow is then guided by the guide component 2 to concentrate and converge, effectively improving the utilization rate of the airflow. Finally, it is blown outward after secondary pressurization and turbulence removal through the rectifier pressurization shroud 1. This not only significantly increases the wind speed and air delivery distance but also achieves the effect of quiet operation and noise reduction.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-speed booster fan module, comprising an air duct (3) and an air inlet (31) and an air outlet (32) connected to the air duct (3), wherein a drive fan blade assembly (4) is provided inside the air duct (3), and the drive fan blade assembly (4) drives air located at the air inlet (31) to flow into the air duct (3) and then blows it outward from the air outlet (32), characterized in that: A pressurizing mechanism is provided at the air outlet (32). A guide (2) is provided on the side of the pressurizing mechanism away from the drive fan blade assembly (4). A rectifier pressurizing shroud (1) is provided on the side of the guide (2) away from the pressurizing mechanism. The pressurizing mechanism pressurizes the airflow delivered by the drive fan blade assembly (4). The guide (2) guides the airflow output from the pressurizing mechanism so that the airflow is blown out in a direction parallel to the axial direction. The rectifier pressurizing shroud (1) pressurizes the airflow output from the guide (2), removes turbulence, and blows it outward.

2. The high-speed booster fan module according to claim 1, characterized in that: The pressurization mechanism includes multiple air-cutting pressurization blades (34) disposed at the air outlet (32). The multiple air-cutting pressurization blades (34) are arranged in a uniformly spaced manner around the air outlet (32) to form an annular pressurization duct. The annular pressurization duct is coaxially disposed with the drive fan blade assembly (4). The drive fan blade assembly (4) includes a rotating seat (41) and drive blades (42) uniformly disposed on the outer peripheral wall of the rotating seat (41). The axial projection area of ​​the drive blades (42) is located outside the projection area of ​​the rotating seat (41) and overlaps with the projection area of ​​the annular pressurization duct.

3. A high-speed booster fan module according to claim 2, characterized in that: The surface of the wind-cutting and pressurizing blade (34) facing the outside of the air outlet (32) is the wind-receiving surface (35), and the surface of the wind-driving blade (42) facing the side of the wind-cutting and pressurizing blade (34) is the wind-driving surface (43). During the rotation of the wind-driving fan blade group (4), the curved surface of the wind-receiving surface (35) and the curved surface of the wind-driving surface (43) in the same radial area intersect, and the included angle θ1 between the wind-receiving surface (35) and the wind-driving surface (43) is <90°.

4. A high-speed booster fan module according to claim 3, characterized in that: The included angle θ2 between the wind-receiving surface (35) and the central axis of the drive fan blade assembly (4) satisfies: 30°<θ2<60°.

5. A high-speed booster fan module according to claim 3 or 4, characterized in that: The angle θ2 between the wind-receiving surface (35) and the central axis of the drive fan blade assembly (4) is 45°.

6. A high-speed booster fan module according to claim 1, characterized in that: The guide element (2) includes a ring cover (21) and a blade base (22) coaxially arranged with the ring cover (21). The circumferential portion of the blade base (22) extends outward to form a guide blade (23). The end of the guide blade (23) away from the blade base (22) is connected to the inner wall of the ring cover (21). The guide blade (23) is arranged parallel to the central axis of the drive fan blade assembly (4). The area where the guide blade (23) is located covers the air outlet (32).

7. A high-speed booster fan module according to claim 6, characterized in that: The blade base (22) is provided with a pressure relief protrusion (24) on the side away from the air outlet (32).

8. A high-speed booster fan module according to claim 7, characterized in that: The pressure relief protrusion (24) is a hemisphere.

9. A high-speed booster fan module according to claim 1, characterized in that: The rectifier booster cover (1) has openings at both ends, and the inner diameter of the rectifier booster cover (1) is radially reduced from the guide member (2) toward the side away from the guide member (2).

10. A high-speed booster fan module according to claim 1, characterized in that: The inner wall of the rectifier booster cover (1) is a circular tube, the inner diameter of the rectifier booster cover (1) is not less than the inner diameter of the guide (2), and the length of the rectifier booster cover (1) is not less than 15mm.

11. A high-speed booster fan module according to claim 1, characterized in that: A motor base (33) is provided at the center of the air outlet (32), and the drive fan blade assembly (4) includes a drive motor (44). The drive motor (44) is mounted on the motor base (33) and located inside the air duct (3).

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