A low-noise booster air guide structure for a handheld fan

Abstract

The utility model relates to air guide structure technical field, concretely relates to a handheld fan with low noise pressure boost air guide structure, including handheld fan body, the top fixed connection of handheld fan body has fixed ring, and one end fixed connection has the air intake cover of fixed ring, and the other end fixed connection has the air outlet pipe of fixed ring, and the middle part fixed connection of air intake cover has the motor, and the output fixed sleeve joint of motor has rotary fan, and the air outlet pipe is raphael pipe, and rotary fan is double -deck fan. Compared with the prior art, the air outlet pipe of the application can increase the wind speed of rotary fan blowing, improve the cooling effect, compared with the traditional single -deck fan can improve the air supply distance, improve the practicality of handheld fan body.

Description

Technical Field

[0001] This utility model relates to the field of air guide structure technology, and in particular to a low-noise pressurized air guide structure for a handheld fan. Background Technology

[0002] The handheld mini fan is a small electrical device driven by a DC brushless motor. It features multiple wind speed settings, a rechargeable lithium battery pack, and a USB-C fast charging port. It delivers efficient airflow through aerospace-grade aluminum alloy fan blades.

[0003] In the prior art, Chinese patent CN221957832U proposes a handheld high-speed fan. A pressure booster is placed around the fan blade assembly. With the support of the pressure booster, the air pressure is greatly increased under the premise of low power, making the blowing effect stronger. This solves the defect of poor air blowing effect of existing portable fans. However, in practical applications, the existing handheld fans still have the problem of low wind speed, resulting in poor air blowing and cooling effect, thus making the handheld fan less effective. Therefore, we disclose a low-noise pressure boosting air guiding structure for handheld fans. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a low-noise pressurized air guiding structure for handheld fans, so as to solve the problem of low wind speed and poor cooling effect of handheld fans.

[0005] To achieve the above objectives, this utility model provides a low-noise pressurized air guiding structure for a handheld fan, comprising a handheld fan body, a fixing ring fixedly connected to the top of the handheld fan body, an air inlet shroud fixedly connected to one end of the fixing ring, an air outlet pipe fixedly connected to the other end of the fixing ring, a motor fixedly connected to the middle of the air inlet shroud, a rotating fan fixedly sleeved at the output end of the motor, the air outlet pipe being a Laval tube, and the rotating fan being a double-layer fan.

[0006] Preferably, both the motor and the rotating fan are located within the fixed ring, and the rotating fan comprises two fans of different sizes.

[0007] Preferably, the air inlet shroud and the air outlet pipe are respectively sleeved on both ends of the fixed ring. A first connecting plate is fixedly connected to both sides of the lower end of the air inlet shroud and the air outlet pipe. Rotating grooves are opened on both sides of the upper end of the handheld fan body. Moving grooves are opened at both ends of the rotating groove. Limiting rings are fixedly connected to both sides of the inner wall of the rotating groove. A connecting ring is rotatably connected to the middle of the limiting ring. A rotating cylinder is fixedly connected to the inner wall of the connecting ring. A screw is threaded to both ends of the rotating cylinder. A first connecting rod is fixedly connected to one end of the screw. The first connecting rod and the screw are slidably connected to the moving groove. A second connecting plate is slidably connected to one end of the first connecting rod that extends to the outside of the handheld fan body.

[0008] Preferably, the movable slot extends through the outside of the handheld fan body, the movable slot is a rectangular slot, the first connecting rod includes a rectangular rod and a circular plate, the rectangular rod is slidably connected to the movable slot, and the diameter of the circular plate is greater than the length of the first connecting rod.

[0009] Preferably, the outer wall of the connecting ring is fixedly connected with a plurality of anti-slip ridges, and the anti-slip ridge on one side of the connecting ring penetrates the rotating groove to the outside of the handheld fan body.

[0010] Preferably, the limiting ring has an annular groove in the middle, and the connecting ring is rotatably connected to the annular groove.

[0011] Preferably, a fixed platform is fixedly connected to the top of the fixed ring, and a third connecting plate is fixedly connected to the top of both the air inlet hood and the air outlet pipe. The third connecting plate is slidably connected to the fixed platform. Movable holes are provided at both ends of the fixed platform, and a second connecting rod is slidably connected in the movable holes. One end of the second connecting rod extends through to the outside of the fixed platform and is fixedly connected to a fourth connecting plate. Two holes are provided at the top of the fixed ring, and two symmetrically distributed limiting blocks are fixedly connected to the inner wall of the holes. Two limiting slots are provided at the lower end of the second connecting rod, and the limiting blocks and the limiting slots are movably engaged. After the second connecting rod slides through the third connecting plate, it engages with the holes of the fixed ring.

[0012] Preferably, the second connecting rod is a T-shaped rod, and the moving hole is a T-shaped hole.

[0013] The beneficial effects of this utility model are as follows: by fixing the relative positions of the handheld fan body, the fixing ring, the air inlet cover and the air outlet pipe, the position of the motor is fixed by the air inlet cover, so that the motor drives the rotating fan to rotate. The air outlet pipe is a Laval tube, which can increase the wind speed blown out by the rotating fan and improve the cooling effect. The rotating fan is a double-layer fan, which can increase the air delivery distance compared with the traditional single-layer fan and improve the practicality of the handheld fan body.

[0014] By fixing the position of the limiting ring on the handheld fan body, the position of the air inlet cover and the air outlet pipe are restricted. The limiting ring, through the connecting ring, restricts the rotation position of the rotating cylinder. When the rotating cylinder rotates, it drives the screw to move along the cylinder, thereby causing the first connecting rod to move within the moving groove. This restricts the first connecting plate to the side of the handheld fan body, thus fixing the position of the air outlet pipe and the air inlet cover after they are fitted with the fixing ring. This allows the user to easily remove the air inlet cover and the air outlet pipe by rotating the rotating cylinder, facilitating the cleaning of the air inlet cover, the air outlet pipe, and the rotating fan. As a result, the rotating fan can maintain good performance even after long-term use, and avoids the drawback of traditional handheld fans that require special tools to disassemble. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0017] Figure 2 This is a partially cut-away three-dimensional structural diagram of the air outlet duct of this utility model;

[0018] Figure 3 This utility model Figure 2 A magnified three-dimensional structural diagram at point A;

[0019] Figure 4 This is a partially cutaway three-dimensional structural diagram of the fixing platform of this utility model.

[0020] The diagram is marked as follows:

[0021] 1. Handheld fan body; 2. Fixing ring; 3. Air inlet cover; 4. Air outlet pipe; 5. Motor; 6. Rotating fan; 7. First connecting plate; 8. Rotating groove; 9. Moving groove; 10. Limiting ring; 11. Connecting ring; 12. Rotating cylinder; 13. Screw; 14. First connecting rod; 15. Second connecting plate; 16. Fixing platform; 17. Third connecting plate; 18. Second connecting rod; 19. Fourth connecting plate; 20. Limiting slot; 21. Limiting block; 22. Moving hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] like Figures 1-4 As shown, a low-noise pressurized air guiding structure for a handheld fan includes a handheld fan body 1. A fixing ring 2 is fixedly connected to the top of the handheld fan body 1. An air inlet cover 3 is fixedly connected to one end of the fixing ring 2, and an air outlet pipe 4 is fixedly connected to the other end of the fixing ring 2. A motor 5 is fixedly connected to the middle of the air inlet cover 3. A rotating fan 6 is fixedly sleeved at the output end of the motor 5. The air outlet pipe 4 is a Laval tube, and the rotating fan 6 is a double-layer fan. Both the motor 5 and the rotating fan 6 are located inside the fixing ring 2. The rotating fan 6 includes two fans of different sizes. In use, the fixing ring 2, which is fixedly connected to the top of the handheld fan body 1, the air inlet cover 3, and the air outlet pipe 4, allows the handheld fan body 1, the fixing ring 2, and the air outlet pipe 4 to be connected, thus creating a fan-like structure. The relative positions of the air inlet shroud 3 and the air outlet duct 4 are fixed. A motor 5 is fixedly connected to the middle of the air inlet shroud 3, and a rotating fan 6 is fixedly sleeved at the output end of the motor 5. This fixes the position of the motor 5 in the air inlet shroud 3, allowing the motor 5 to drive the rotating fan 6 to rotate. The air outlet duct 4 is a Laval tube, which increases the air speed blown out by the rotating fan 6 and improves the cooling effect. The rotating fan 6 is a double-layer fan, which increases the air delivery distance compared to a traditional single-layer fan, improving the practicality of the handheld fan body 1. Both the motor 5 and the rotating fan 6 are located within the fixing ring 2. The rotating fan 6 includes two fans of different sizes, so that the larger outer fan of the rotating fan 6 can concentrate the air, while the smaller inner fan cuts the airflow, increasing the air delivery distance.

[0025] As a preferred embodiment of this example, Figures 1-4As shown, the air inlet shroud 3 and the air outlet pipe 4 are respectively sleeved on both ends of the fixed ring 2. First connecting plates 7 are fixedly connected to both sides of the lower end of the air inlet shroud 3 and the air outlet pipe 4. Rotating grooves 8 are provided on both sides of the upper end of the handheld fan body 1. Moving grooves 9 are provided at both ends of the rotating grooves 8. Limiting rings 10 are fixedly connected to both sides of the inner wall of the rotating groove 8. A connecting ring 11 is rotatably connected to the middle of the limiting ring 10. A rotating cylinder 12 is fixedly connected to the inner wall of the connecting ring 11. Screws 13 are threaded to both ends of the rotating cylinder 12. A first connecting rod 14 is fixedly connected to one end of the screw 13. The first connecting rod 14 and the screw 13 are slidably connected to the moving groove 9. A second connecting plate 15 is slidably connected to one end of the first connecting rod 14 that extends through to the outside of the handheld fan body 1. The moving groove 9... The movable groove 9 extends to the outside of the handheld fan body 1. The first connecting rod 14 includes a rectangular rod and a circular plate. The rectangular rod is slidably connected to the movable groove 9. The diameter of the circular plate is greater than the length of the first connecting rod 14. Several anti-slip ridges are fixedly connected to the outer wall of the connecting ring 11. One anti-slip ridge on one side of the connecting ring 11 penetrates the rotating groove 8 to the outside of the handheld fan body 1. An annular groove is opened in the middle of the limiting ring 10. The connecting ring 11 is rotatably connected within the annular groove. A fixed platform 16 is fixedly connected to the top of the fixed ring 2. A third connecting plate 17 is fixedly connected to the top of both the air inlet shroud 3 and the air outlet pipe 4. The third connecting plate 17 is slidably connected to the fixed platform 16. Movable holes 22 are opened at both ends of the fixed platform 16. A second connecting rod 18 is slidably connected within the movable holes 22. One end of the second connecting rod 18 extends through the outside of the fixed platform 16 and is fixedly connected to the fourth connecting plate 19. The top of the fixed ring 2 has two holes, and the inner walls of the holes are fixedly connected to two symmetrically distributed limiting blocks 21. The lower end of the second connecting rod 18 has two limiting slots 20, which are movably engaged with the limiting blocks 21 and the limiting slots 20. The second connecting rod 18 slides through the third connecting plate 17 and engages with the holes in the fixed ring 2. The second connecting rod 18 is a T-shaped rod, and the moving hole 22 is a T-shaped hole. It is fitted onto both ends of the fixed ring 2 via the air inlet hood 3 and the air outlet pipe 4. The lower ends of the air inlet hood 3 and the air outlet pipe 4 are fixedly connected to both sides of the first connecting plate 7. Rotating grooves 8 are provided on both sides of the upper end of the handheld fan body 1, and moving grooves 8 are provided at both ends of the rotating grooves 8. Both sides of the inner wall of the groove 9 and the rotating groove 8 are fixedly connected to limit rings 10. A connecting ring 11 is rotatably connected to the middle of the limit ring 10. A rotating cylinder 12 is fixedly connected to the inner wall of the connecting ring 11. Both ends of the rotating cylinder 12 are threadedly connected to screws 13. One end of the screw 13 is fixedly connected to a first connecting rod 14. The first connecting rod 14 and the screw 13 are slidably connected to the moving groove 9. The end of the first connecting rod 14 that extends through to the outside of the handheld fan body 1 is slidably connected to a second connecting plate 15. This fixes the position of the limit ring 10 in the handheld fan body 1, restricts the position of the air inlet shroud 3 and the air outlet pipe 4 by the fixing ring 2, and restricts the rotation position of the rotating cylinder 12 through the connecting ring 11. When the rotating cylinder 12 rotates, it can drive the screw 13 to move along the rotating cylinder 12.This allows the first connecting rod 14 to move within the moving groove 9, restricting the first connecting plate 7 to the side of the handheld fan body 1. This then fixes the position of the air outlet pipe 4 and the air inlet cover 3 after they are fitted with the fixing ring 2. This allows the user to easily remove the air inlet cover 3 and the air outlet pipe 4 by rotating the rotating cylinder 12, facilitating the cleaning of the air inlet cover 3, the air outlet pipe 4, and the rotating fan 6. This ensures that the rotating fan 6 maintains good performance even after long-term use, avoiding the drawback of traditional handheld fans requiring special tools for disassembly. The moving groove 9 extends through to the outside of the handheld fan body 1. The moving groove 9 is a rectangular groove. The first connecting rod 14 includes a rectangular rod and a circular plate. The rectangular rod is slidably connected to the moving groove 9, and the circular plate... The diameter of the first connecting rod 14 is greater than the length of the first connecting rod 14, so that the moving groove 9 restricts the moving direction of the first connecting rod 14 and the moving distance of the first connecting rod 14, ensuring that the first connecting rod 14 is connected to the first connecting plate 7. Several anti-slip ridges are fixedly connected to the outer wall of the connecting ring 11. The anti-slip ridge on one side of the connecting ring 11 penetrates the rotating groove 8 to the outside of the handheld fan body 1, so that the connecting ring 11 can rotate easily. An annular groove is opened in the middle of the limiting ring 10, and the connecting ring 11 is rotatably connected in the annular groove, so that the limiting ring 10 restricts the rotation position of the connecting ring 11. A fixed platform 16 is fixedly connected to the top of the fixed ring 2. The tops of the air inlet hood 3 and the air outlet pipe 4 are both fixedly connected to a third connecting plate 7. Plate 17 fixes the fixed ring 2 to the position of the fixed platform 16. Movable holes 22 are provided at both ends of the fixed platform 16. A second connecting rod 18 is slidably connected within each movable hole 22. One end of the second connecting rod 18 extends through the outside of the fixed platform 16 and is fixedly connected to a fourth connecting plate 19. This restricts the movement of the second connecting rod 18 through the movable holes 22, allowing the fourth connecting plate 19 to move the second connecting rod 18. Two holes are provided at the top of the fixed ring 2, with two symmetrically distributed limiting blocks 21 fixedly connected to the inner walls of the holes. Two limiting slots 20 are provided at the lower end of the second connecting rod 18. The limiting blocks 21 and the limiting slots 20 are movably engaged, allowing the fixed ring 2 to engage with the limiting blocks 21. The slot 20 engages and restricts the position of the second connecting rod 18. The second connecting rod 18 slides through the third connecting plate 17 and engages with the hole in the fixing ring 2, thus restricting the position of the third connecting plate 17. This, in turn, restricts the position of the air inlet hood 3 and the air outlet pipe 4 after they are fitted with the fixing ring 2. Furthermore, the direction of disengagement between the air inlet hood 3 and the air outlet pipe 4 and the fixing ring 2 is perpendicular to the direction of loosening of the connection between the second connecting rod 18 and the third connecting plate 17. Therefore, the second connecting rod 18 is not easily disconnected from the third connecting plate 17. Since the second connecting rod 18 is a T-shaped rod and the moving hole 22 is a T-shaped hole, the connection between the moving hole 22 and the second connecting rod 18 will not break, thereby preventing the second connecting rod 18 from being lost.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0027] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-noise plenum air guide structure for a handheld fan, comprising a handheld fan body (1), characterized in that, A fixing ring (2) is fixedly connected to the top of the handheld fan body (1). An air inlet cover (3) is fixedly connected to one end of the fixing ring (2). An air outlet pipe (4) is fixedly connected to the other end of the fixing ring (2). A motor (5) is fixedly connected to the middle of the air inlet cover (3). A rotating fan (6) is fixedly sleeved at the output end of the motor (5). The air outlet pipe (4) is a Laval tube. The rotating fan (6) is a double-layer fan.

2. The low noise plenum air directing structure for a handheld fan of claim 1, wherein, The motor (5) and the rotating fan (6) are both located inside the fixed ring (2), and the rotating fan (6) includes two fans of different sizes.

3. The low noise plenum air duct structure for a handheld fan of claim 1, wherein The air inlet shroud (3) and the air outlet pipe (4) are respectively sleeved on both ends of the fixing ring (2). The air inlet shroud (3) and the air outlet pipe (4) are both fixedly connected to the two sides of their lower ends. The upper ends of the handheld fan body (1) are provided with rotating grooves (8) on both sides. The two ends of the rotating grooves (8) are provided with moving grooves (9). The inner walls of the rotating grooves (8) are fixedly connected to the two sides of the rotating grooves (8). The middle part of the limiting rings (10) is rotatably connected to the limiting rings (10). There is a connecting ring (11), and a rotating cylinder (12) is fixedly connected to the inner wall of the connecting ring (11). Both ends of the rotating cylinder (12) are threadedly connected to screws (13). One end of the screw (13) is fixedly connected to a first connecting rod (14). The first connecting rod (14) and the screw (13) are slidably connected to the moving groove (9). The first connecting rod (14) is slidably connected to a second connecting plate (15) at one end that extends through to the outside of the handheld fan body (1).

4. The low noise plenum air duct structure for a handheld fan of claim 3, wherein The movable groove (9) extends through the outside of the handheld fan body (1). The movable groove (9) is a rectangular groove. The first connecting rod (14) includes a rectangular rod and a circular plate. The rectangular rod is slidably connected to the movable groove (9). The diameter of the circular plate is greater than the length of the first connecting rod (14).

5. The low noise plenum air duct structure for a handheld fan of claim 3, wherein, The outer wall of the connecting ring (11) is fixedly connected with several anti-slip ridges, and the anti-slip ridge on one side of the connecting ring (11) passes through the rotating groove (8) to the outside of the handheld fan body (1).

6. The low noise plenum air duct structure for a handheld fan of claim 3, wherein The limiting ring (10) has an annular groove in the middle, and the connecting ring (11) is rotatably connected in the annular groove.

7. The low noise plenum air duct structure for a handheld fan of claim 1, wherein The top end of the fixed ring (2) is fixedly connected to a fixed platform (16). The top ends of the air inlet hood (3) and the air outlet pipe (4) are both fixedly connected to a third connecting plate (17). The third connecting plate (17) is slidably connected to the fixed platform (16). The fixed platform (16) has moving holes (22) at both ends. A second connecting rod (18) is slidably connected in the moving hole (22). One end of the second connecting rod (18) passes through to the outside of the fixed platform (16) and is fixedly connected to a fourth connecting plate (19). The top end of the fixed ring (2) has two holes. The inner wall of the holes is fixedly connected to two symmetrically distributed limiting blocks (21). The lower end of the second connecting rod (18) has two limiting slots (20). The limiting blocks (21) and the limiting slots (20) are movably engaged. The second connecting rod (18) slides through the third connecting plate (17) and engages with the holes of the fixed ring (2).

8. The low noise plenum air duct structure for a handheld fan of claim 7, wherein, The second connecting rod (18) is a T-shaped rod, and the moving hole (22) is a T-shaped hole.

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