Butterfly suction fan for car seat

Abstract

The utility model relates to the technical field of automobile seat butterfly suction fan, specifically relates to a kind of automobile seat butterfly suction fan, including upper shell, the lower shell is arranged in the upper shell back, the fan mechanism is arranged in the upper shell interior, the lower shell front is provided with circuit board, the coil is provided in the circuit board front, the fan mechanism includes bearing disc, the bearing disc is arranged in the lower shell front, the bearing disc front is fixedly connected with connecting sleeve, the first rotating lever is fixedly connected in the connecting sleeve axle center, the bearing disc front is fixedly connected with fan blade, the inclined plane is established in the fan blade side, the fan blade arc face outer wall is established with the resistance-reducing groove. The utility model reduces airflow impact and initial turbulence by optimizing air inlet angle with inclined plane, and the resistance-reducing groove reduces air friction resistance, so that fan blade rotates more smoothly, the first fillet and second fillet at both ends of resistance-reducing groove avoid stress concentration, prevent crack generation, prolong service life.

Description

Technical Field

[0001] This utility model relates to the technical field of butterfly-shaped suction fans for car seats, specifically a butterfly-shaped suction fan for car seats. Background Technology

[0002] As living standards improve, cars have gradually become a common mode of transportation, and people have increasingly higher demands for car comfort. Among these, the comfort of car seats has the most critical impact on usability, and more and more manufacturers are adopting seats with ventilation functions.

[0003] Patent document CN222457819U discloses a butterfly-shaped suction fan for automotive seats, comprising an upper shell, a lower shell, fan blades, and a PCB board. The upper and lower shells are connected to each other, and the fan blades are disposed between them. The upper shell has an air inlet. The fan blades include an upper fan blade ring, a lower fan blade ring, a mounting groove, and a central shaft. The upper and lower fan blade rings are coaxial. The mounting groove is located in the middle of the upper and lower fan blade rings and is fixedly connected to the lower fan blade ring. Multiple blades are evenly distributed circumferentially between the upper and lower fan blade rings. The upper fan blade ring, lower fan blade ring, mounting groove, and each blade are integrally injection molded. The central shaft is pre-embedded and fixed in the center of the mounting groove. A magnetic ring rotor is coaxially fixedly installed in the mounting groove. The PCB board is mounted on the lower shell, and a fan stator is fixedly installed on the PCB board. The fan stator is coaxially disposed inside the magnetic ring rotor, and the central shaft passes through the fan stator and is rotatably connected to the lower shell. This design can improve airflow, reduce noise, and improve driving comfort.

[0004] While the aforementioned application claims to increase airflow, reduce noise, and improve driving comfort, the lack of fan drag reduction during use results in louder turbulence noise and significant energy loss.

[0005] Therefore, a butterfly-shaped suction fan for car seats is proposed to solve the problems mentioned above. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a butterfly-shaped suction fan for car seats, which solves the problems of increased turbulence noise and high energy loss caused by the lack of drag reduction during use.

[0007] To achieve the above objectives, the present invention provides the following technical solution: it includes an upper shell, a lower shell is provided on the back of the upper shell, a fan mechanism is provided inside the upper shell, a circuit board is provided on the front of the lower shell, and a coil is provided on the front of the circuit board; The fan mechanism includes a support plate, which is disposed on the front side of the lower shell. A connecting sleeve is fixedly connected to the front side of the support plate, and a first rotating rod is fixedly connected to the shaft center of the connecting sleeve. A fan blade is fixedly connected to the front side of the support plate. An inclined surface is formed on the side of the fan blade, and a drag-reducing groove is formed on the outer wall of the arc-shaped surface of the fan blade. A first rounded corner is formed at the end of the drag-reducing groove near the inclined surface, and a second rounded corner is formed at the end of the drag-reducing groove away from the inclined surface.

[0008] Preferably, a second rotating rod is provided at the center of the coil shaft, and the front of the second rotating rod is fixedly connected to the back of the first rotating rod.

[0009] Preferably, a plurality of the fan blades are fixedly connected to the outer wall of the arc-shaped surface with a fixing ring for further improving the stability of the fan blades.

[0010] Preferably, the upper shell has an air inlet on its front side, and the upper shell and the lower shell have air outlets on their curved outer walls.

[0011] Preferably, the coil is electrically connected to the circuit board, and the front side of the circuit board has a slot for holding the coil.

[0012] Preferably, the lower shell has a mounting plate fixedly connected to its arc-shaped outer wall, and the upper shell and the lower shell are snapped together by a buckle on the arc-shaped outer wall.

[0013] Compared with the prior art, the present invention provides a butterfly-shaped suction fan for car seats, which has the following beneficial effects: 1. By optimizing the intake angle through the inclined surface, the airflow impact and initial turbulence are reduced. The drag-reducing groove reduces air friction resistance, making the fan blades rotate more smoothly. The first and second fillets at both ends of the drag-reducing groove avoid stress concentration, prevent crack formation, and extend service life.

[0014] Second, the retaining ring enhances the rigidity of the blades and prevents deformation due to high-speed vibration. The retaining ring connects the fan blades into a whole, improving rigidity and preventing deformation caused by centrifugal force. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a schematic diagram of part of the structure of this utility model; Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Upper shell; 2. Lower shell; 3. Fan mechanism; 31. Support plate; 32. Connecting sleeve; 33. First rotating rod; 34. Fan blade; 35. Fixing ring; 36. Inclined surface; 37. Drag reduction groove; 38. First rounded corner; 39. Second rounded corner; 4. Coil; 41. Second rotating rod; 5. Circuit board. Detailed Implementation

[0017] 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. Example

[0018] See Figures 1-4 This embodiment provides a butterfly-shaped suction fan for a car seat, including an upper shell 1, a lower shell 2 on the back of the upper shell 1, a fan mechanism 3 inside the upper shell 1, a circuit board 5 on the front of the lower shell 2, and a coil 4 on the front of the circuit board 5. The fan mechanism 3 includes a support plate 31, which is located on the front of the lower shell 2. A connecting sleeve 32 is fixedly connected to the front of the support plate 31, and a first rotating rod 33 is fixedly connected to the shaft of the connecting sleeve 32. A fan blade 34 is fixedly connected to the front of the support plate 31. An inclined surface 36 is formed on the side of the fan blade 34, and a drag-reducing groove 37 is formed on the outer wall of the arc-shaped surface of the fan blade 34. A first rounded corner 38 is formed at the end of the drag-reducing groove 37 near the inclined surface 36, and a second rounded corner 39 is formed at the end of the drag-reducing groove 37 away from the inclined surface 36. See Figure 4 The inclined surface 36 optimizes the blade's windward angle, allowing the airflow to cut into the blade more smoothly, reducing initial impact and turbulence, thereby reducing noise. The drag-reducing groove 37 can suppress the eddies generated by the air on the blade surface, reducing surface friction resistance, making the fan rotate more smoothly, thereby improving air volume and energy efficiency. The first rounded corner 38 and the second rounded corner 39 avoid stress concentration at both ends of the drag-reducing groove 37, prevent cracks from forming, and at the same time make the airflow transition more smoothly when passing through the groove.

[0019] See Figure 2 A second rotating rod 41 is provided at the center of the coil 4 shaft. The front of the second rotating rod 41 is fixedly connected to the back of the first rotating rod 33. Through the fixed connection between the second rotating rod 41 and the first rotating rod 33, the synchronous rotation of the motor rotor and the fan blade 34 is realized.

[0020] See Figure 3Multiple fan blades 34 are fixedly connected to the outer wall of the arc-shaped surface with fixing rings 35 to further improve the stability of the fan blades 34. The fixing rings 35 connect the ends of all the independent fan blades 34 into a whole, which greatly improves the rigidity of the fan blades 34 and avoids the blades from shaking or deforming due to centrifugal force when rotating at high speed. At the same time, it can change the natural frequency of the structure and prevent resonance from coinciding with the vibration frequency of the motor, thereby further reducing noise.

[0021] See Figures 1-2 An air inlet is provided on the front of the upper shell 1, and an air outlet is provided on the outer wall of the arc-shaped surface of the upper shell 1 and the lower shell 2. Air is drawn in from the air inlet on the front of the upper shell 1, gains kinetic energy and pressure under the push of the fan blades 34, and is finally discharged from the air outlet on the outer wall of the arc-shaped surface of the upper shell 1 and the lower shell 2.

[0022] The coil 4 is electrically connected to the circuit board 5. The front of the circuit board 5 has a slot for holding the coil 4. The circuit board 5 provides pulse current to the coil 4. By controlling the magnitude and frequency of the current, the speed and torque of the motor can be precisely adjusted, thereby realizing multi-level or stepless adjustment of the air volume. The slot on the front of the circuit board 5 provides physical positioning and fixation of the coil 4, ensuring the stability of the electrical connection and facilitating automated assembly.

[0023] The lower shell 2 has a mounting plate fixedly connected to its curved outer wall. The upper shell 1 and the lower shell 2 are snapped together by the buckles on the curved outer wall. The mounting plate is fixedly connected to the curved outer wall of the lower shell 2. The entire fan module is fixed to the seat frame by screws and other fasteners to prevent loosening during operation. This enables the upper shell 1 and the lower shell 2 to be quickly assembled without screws by the buckles on their curved outer walls, simplifying the assembly process and facilitating later maintenance and disassembly.

[0024] In practical use, the aforementioned device secures the entire fan assembly to the car seat frame via a mounting plate fixedly connected to the outer wall of the arc-shaped surface of the lower housing 2. When the user activates the seat ventilation function, the circuit board 5 is energized and establishes an electrical connection with the coil 4 through a slot on its front, supplying power to it. The energized coil 4 generates a rotating magnetic field, driving the second rotating rod 41 at its axis to begin high-speed rotation. Since the front of the second rotating rod 41 is fixedly connected to the back of the first rotating rod 33, the power is directly transmitted to the fan mechanism 3. The first rotating rod 33 drives its fixedly connected connecting sleeve 32 and the carrier plate 31 to rotate synchronously, thereby... The multiple fan blades 34 fixed to the front of the bearing plate 31 are put into operation. During rotation, the inclined surface 36 on the side of the fan blade 34 optimizes the air intake angle, so that air can be drawn in more smoothly and quietly from the air intake on the front of the upper shell 1. At the same time, the drag-reducing groove 37 opened on the outer wall of the arc surface of the fan blade 34 has a smooth transition at both ends by the first rounded corner 38 and the second rounded corner 39, which reduces air friction resistance, thereby significantly reducing operating noise while improving efficiency. To ensure absolute stability under high-speed operation, the ends of all fan blades 34 are connected into a whole by the fixing ring 35, which greatly enhances the structural rigidity of the fan blades 34.

[0025] The specific installation and connection method of the device in this application with the existing car seat butterfly-shaped suction fan is prior art, therefore, it is not described in detail in this embodiment. The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0026] 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 butterfly-shaped suction fan for car seats, characterized in that: Includes an upper shell (1), a lower shell (2) is provided on the back of the upper shell (1), a fan mechanism (3) is provided inside the upper shell (1), a circuit board (5) is provided on the front of the lower shell (2), and a coil (4) is provided on the front of the circuit board (5). The fan mechanism (3) includes a support plate (31), which is disposed on the front of the lower shell (2). A connecting sleeve (32) is fixedly connected to the front of the support plate (31). A first rotating rod (33) is fixedly connected to the shaft of the connecting sleeve (32). A fan blade (34) is fixedly connected to the front of the support plate (31). An inclined surface (36) is provided on the side of the fan blade (34). A drag-reducing groove (37) is provided on the outer wall of the arc surface of the fan blade (34). A first rounded corner (38) is provided at one end of the drag-reducing groove (37) near the inclined surface (36), and a second rounded corner (39) is provided at one end of the drag-reducing groove (37) away from the inclined surface (36).

2. The butterfly-shaped suction fan for a car seat according to claim 1, characterized in that: A second rotating rod (41) is provided at the center of the coil (4), and the front of the second rotating rod (41) is fixedly connected to the back of the first rotating rod (33).

3. The butterfly-shaped suction fan for a car seat according to claim 1, characterized in that: The outer wall of the arc-shaped surface of the multiple fan blades (34) is fixedly connected with a fixing ring (35) for further improving the stability of the fan blades (34).

4. A butterfly-shaped suction fan for car seats according to claim 1, characterized in that: The upper shell (1) has an air inlet on its front side, and the upper shell (1) and the lower shell (2) have air outlets on their arc-shaped outer walls.

5. A butterfly-shaped suction fan for car seats according to claim 1, characterized in that: The coil (4) is electrically connected to the circuit board (5), and the front of the circuit board (5) has a slot for holding the coil (4).

6. A butterfly-shaped suction fan for car seats according to claim 1, characterized in that: The lower shell (2) has an mounting plate fixedly connected to its arc-shaped outer wall, and the upper shell (1) and the lower shell (2) are snapped together by the buckles on the arc-shaped outer wall.

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