Butterfly-shaped air suction fan

Abstract

The utility model discloses a butterfly-shaped air suction fan, which relates to the technical field of seat ventilation and comprises an upper shell, a fan component and a lower shell which are sequentially arranged from top to bottom. An air inlet is formed in the upper shell; a first air blocking ring is fixedly arranged on one side of the air inlet; the fan assembly is provided with an upper inlet and a plurality of side air outlets, and the upper inlet communicates with the side air outlets; a second air blocking ring is fixedly arranged on the upper inlet; the inner diameter of the second windshield ring is larger than that of the first windshield ring; in the vertical direction, the upper end of the second air blocking ring is higher than the lower end of the first air blocking ring; a rotating gap is formed between the upper shell and the fan assembly; a stator is fixedly arranged on the lower shell, and a rotor is fixedly arranged in the fan assembly. A plurality of connecting columns extending upwards are fixedly arranged on the circumferential edge of the lower shell, and clamping pieces are arranged at the upper ends of the connecting columns; connecting holes are formed in the positions, corresponding to the connecting columns, of the circumferential edge of the upper shell, and the clamping pieces are clamped in the corresponding connecting holes respectively. The ventilation air volume and the air pressure are improved, and the driving comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seat ventilation, in particular to a butterfly-shaped air suction fan. Background Art

[0002] With the improvement of living standards, cars have gradually become a means of transportation for the public, and people have higher and higher requirements for the comfort of cars. Among them, the comfort of car seats is the most crucial for use, and more and more manufacturers adopt seats with ventilation functions. The air volume, air pressure and noise of the fan in the ventilation system are the key factors for the ventilation effect.

[0003] Therefore, it is necessary to optimize the design to improve the air volume and air pressure of the air suction fan and enhance driving comfort. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a butterfly-shaped air suction fan to solve the problems existing in the above-mentioned prior art, improve the ventilation air volume and air pressure, and assist in improving driving comfort.

[0005] To achieve the above purpose, the utility model provides the following scheme:

[0006] The utility model provides a butterfly-shaped air suction fan, which comprises an upper shell, a fan assembly and a lower shell arranged in sequence from top to bottom; an air inlet is arranged on the upper shell; a first wind shield ring is fixedly arranged on one side of the air inlet close to the fan assembly; the fan assembly has an upper inlet and a plurality of side air outlets, the upper inlet is communicated with each side air outlet, and each side air outlet is circumferentially and uniformly distributed around the axis of the fan assembly; a second wind shield ring is fixedly arranged on the upper inlet; the inner diameter of the second wind shield ring is larger than the outer diameter of the first wind shield ring; and in the vertical direction, the upper end of the second wind shield ring is higher than the lower end of the first wind shield ring; there is a rotation gap between the upper shell and the fan assembly; a stator is fixedly arranged on the lower shell, and a rotor corresponding to the stator is fixedly arranged in the fan assembly; a plurality of connecting columns extending upward are fixedly arranged on the circumferential edge of the lower shell, and a clamping member is arranged at the upper end of the connecting column; connecting holes are arranged at the positions corresponding to the connecting columns on the circumferential edge of the upper shell, and each clamping member is respectively clamped in the corresponding connecting hole.

[0007] Preferably, the fan assembly includes a fan wheel, a shaft rod, an elastic element, and a shaft retainer; an upper inlet is provided at the upper end of the fan wheel, and each side air outlet is provided on the side wall of the fan wheel; in the vertical direction, the upper end of the shaft rod is fixedly connected to the fan wheel, and the lower end of the shaft rod extends downward; a sleeve assembly is fixedly provided on the lower housing, the sleeve assembly has an installation channel, and the lower end of the shaft rod is rotatably connected in the installation channel; a clamping groove is provided on the side wall of the lower end of the shaft rod extending out of the installation channel, and the shaft retainer is clamped in the clamping groove; the elastic element is sleeved on the shaft rod between the fan wheel and the installation channel, and the elastic element is in a compressed state.

[0008] Preferably, the sleeve assembly includes a copper sleeve, an upper bearing, and a lower bearing; in the vertical direction, the copper sleeve has an upper bearing installation groove, a communication hole, and a lower bearing installation groove that are sequentially communicated; the inner diameter of the upper bearing installation groove and the inner diameter of the lower bearing installation groove are both larger than the inner diameter of the communication hole; the inner ring of the upper bearing is fixedly sleeved on the shaft rod, and the outer ring of the upper bearing is fixedly provided in the upper bearing installation groove; the inner ring of the lower bearing is fixedly sleeved on the shaft rod, and the outer ring of the lower bearing is fixedly provided in the lower bearing installation groove; the inner ring channel of the upper bearing, the communication hole, and the inner ring channel of the lower bearing together form the installation channel; the lower end of the elastic element abuts against the end face of the inner ring of the upper bearing.

[0009] Preferably, in the axial direction of the shaft rod, the height of the clamping groove is greater than the height of the shaft retainer.

[0010] Preferably, an upper bearing limiting surface is provided at the connection between the upper bearing installation groove and the communication hole; a lower bearing limiting surface is provided at the connection between the lower bearing installation groove and the communication hole; in the axial direction of the shaft rod, the lower end of the upper bearing contacts the upper bearing limiting surface, and the upper end of the lower bearing contacts the lower bearing limiting surface.

[0011] Preferably, a plurality of dynamic balance installation grooves are provided on the fan wheel, and dynamic balance blocks are fixedly installed in each dynamic balance installation groove.

[0012] Preferably, a PCB assembly is also fixedly provided on the lower housing, the stator is fixedly provided on the PCB assembly, and a plug-in component is provided on the PCB assembly.

[0013] Preferably, the PCB assembly has a PCB board; a plurality of fixing holes are provided on the PCB board; fixing columns are fixedly provided at positions corresponding to each fixing hole on the lower housing; the part of the fixing column extending out of the fixing hole can be melted to form a fixing connection head, and the outer diameter of the fixing connection head is larger than the inner diameter of the fixing hole.

[0014] Preferably, the connecting column has a through mounting hole.

[0015] Preferably, a placing groove and a through hole are formed in the middle of the fan wheel. The placing groove is located above the through hole and the placing groove communicates with the through hole; a pressing joint is arranged at the upper end of the shaft rod, and external convex teeth are arranged on the outer side wall of the pressing joint; the shaft rod is arranged in the placing groove and the through hole, and the pressing joint of the shaft rod is located in the placing groove; a connecting material is filled in the placing groove, and the connecting material can fixedly connect the pressing joint and the fan wheel together.

[0016] The utility model has achieved the following technical effects compared with the prior art:

[0017] For the butterfly suction fan provided by the utility model, a first wind shield ring is arranged on one side of the air inlet of the upper shell close to the fan assembly, and a second wind shield ring is arranged at the position of the fan assembly corresponding to the first wind shield ring. The second wind shield ring is located outside the first wind shield ring, and the upper end of the second wind shield ring is higher than the lower end of the first wind shield ring. The first wind shield ring and the second wind shield ring cooperate with each other to guide the air flow to flow more concentratedly towards the fan assembly, reduce the air flow disorder, enable the air flow to enter more smoothly, and reduce the dispersion and loss of the air flow, ensure that more air enters, and improve the air volume; and the cooperation between the first wind shield ring and the second wind shield ring can reduce the pressure loss caused by the pressure difference between the air inlet and the side air outlets on each side, thereby improving the ventilation air volume and air pressure and assisting in improving the driving comfort; with the upper end as the air inlet and a butterfly structure with a plurality of side air outlets arranged on its side, it can generate a large air volume and air pressure, quickly suck air through the upper air inlet, and then strongly discharge it from the side air outlets, which can accelerate the air circulation inside the seat, and there are no other components blocking the side air outlets except the connecting columns for connecting the upper shell and the lower shell on its side, so that the air outlet is smoother.

[0018] Further, the elastic element can cooperate with the shaft stop to stably position the shaft rod in the installation channel; and the elastic element can slow down the vibration in the axial direction of the shaft rod, reduce the noise caused by the vibration and the unstable air flow caused by the vibration.

[0019] Further, the shaft rod is rotationally connected with the copper bushing by means of an upper bearing and a lower bearing, and its rotation is more flexible and light, reducing the rotational friction resistance, and the cooperation between the upper bearing and the lower bearing and the shaft rod can be used to support the weight of components such as the fan wheel, ensuring its stable rotation.

[0020] Further, the height of the clamping groove arranged on the shaft rod is greater than the height of the shaft stop, and the gap size between the upper end of the fan wheel fixedly connected with the shaft rod and the upper shell can be adjusted by replacing shaft stops with different thicknesses.

[0021] Further, the upper bearing limiting surface and the lower bearing limiting surface can respectively limit the installation positions of the upper bearing and the lower bearing, thereby ensuring the stability of the installation positions of the shaft rod and the fan wheel.

[0022] Further, the dynamic balance installation groove provided on the fan wheel can correct the dynamic balance of the fan wheel and install the corresponding dynamic balance block, so that the fan wheel reaches a balanced state and reduces the vibration of the fan wheel.

[0023] Further, the PCB assembly can accurately adjust the speed of the fan assembly, thereby providing a more flexible fan speed for the fan assembly, and thus providing a more accurate air suction volume; and the plug-in connectors provided on the PCB assembly are convenient for connection and use.

[0024] Further, the PCB board adopts a method of cooperating with the fixing holes through the fixing posts, and the upper end of the fixing post can be melted to realize the fixed connection between the fixing post and the fixing hole. Its structure is simple and convenient for connection and fixation.

[0025] Further, the connecting column is provided with a through installation hole, which can facilitate the overall installation and provide an installation position for the overall installation.

[0026] Further, the pressure joint at the upper end of the shaft rod is provided with an outer convex tooth on the outer side wall, which can be embedded in the placing groove of the fan wheel, thereby enhancing the fixed connection strength between the shaft rod and the fan wheel, making the fan wheel more stable during high-speed rotation, having better dynamic balance, and reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic diagram of the overall structure of the butterfly-shaped air suction fan provided by the present invention;

[0029] Figure 2 It is an exploded view of the overall structure of the butterfly-shaped air suction fan provided by the present invention;

[0030] Figure 3 It is a top view of the butterfly-shaped air suction fan provided by the present invention;

[0031] Figure 4 It is a schematic diagram of the structure of the cooperation between the fan wheel and the shaft rod of the butterfly-shaped air suction fan provided by the present invention;

[0032] Figure 5Schematic cross-sectional structure diagram of the fan wheel and the shaft rod in the butterfly suction fan provided by the present utility model;

[0033] Figure 6 Schematic structure diagram of another perspective of the fan wheel and the shaft rod in the butterfly suction fan provided by the present utility model;

[0034] Figure 7 Schematic cross-sectional structure diagram of the upper shell, the fan wheel and the shaft rod in the butterfly suction fan provided by the present utility model;

[0035] Figure 8 Schematic structure diagram of the shaft rod in the butterfly suction fan provided by the present utility model;

[0036] Figure 9 Schematic structure diagram of the magnetic ring in the butterfly suction fan provided by the present utility model;

[0037] Figure 10 Schematic structure diagram of the PCB assembly in the butterfly suction fan provided by the present utility model;

[0038] Figure 11 Schematic structure diagram of the cooperation of the fan wheel, the shaft rod and the copper bushing in the butterfly suction fan provided by the present utility model;

[0039] Figure 12 Schematic structure diagram of the lower shell in the butterfly suction fan provided by the present utility model;

[0040] Figure 13 Schematic structure diagram of another upper shell in the butterfly suction fan provided by the present utility model.

[0041] In the figure:

[0042] 100 - Butterfly suction fan;

[0043] 10 - Upper shell; 11 - Air inlet; 12 - Reinforcing rib; 13 - First wind shield ring; 14 - Connection hole;

[0044] 20 - Fan wheel; 21 - Upper blade ring; 22 - Blades; 23 - Lower blade ring; 24 - Second wind shield ring; 25 - Dynamic balance mounting groove; 26 - Resting groove; 27 - Through hole; 28 - Side air outlet;

[0045] 30 - Shaft rod; 301 - Card slot; 31 - Elastic element; 32 - Upper bearing; 321 - Upper bearing limiting surface; 33 - Lower bearing; 331 - Lower bearing limiting surface; 34 - Shaft stop; 35 - Copper bushing; 36 - Pressing joint; 37 - Magnetic ring; 371 - Iron shell; 372 - Magnetic strip;

[0046] 40 - PCB board; 41 - Fixing hole; 42 - Pin;

[0047] 50 - Lower housing; 51 - Connecting column; 511 - Mounting hole; 52 - Clamping part; 53 - Fixed column; 54 - Connector; 55 - Accommodating groove; 56 - Avoidance hole. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] The purpose of the present invention is to provide a butterfly suction fan to solve the problems existing in the prior art, improve the ventilation air volume and air pressure, and assist in improving driving comfort.

[0050] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0051] Embodiment 1

[0052] This embodiment provides a butterfly suction fan 100, mainly but not limited to ventilation use on automotive seats. As Figures 1 to 13 shown, it includes an upper housing 10, a fan assembly, and a lower housing 50 arranged in sequence from top to bottom; an air inlet 11 is provided on the upper housing 10; a first wind shield ring 13 is fixedly provided on one side of the air inlet 11 close to the fan assembly; the fan assembly has an upper inlet and a plurality of side air outlets 28, the upper inlet is communicated with each side air outlet 28, and each side air outlet 28 is circumferentially and evenly distributed around the axis of the fan assembly; a second wind shield ring 24 is fixedly provided on the upper inlet; the inner diameter of the second wind shield ring 24 is larger than the outer diameter of the first wind shield ring 13; and in the vertical direction, the upper end of the second wind shield ring 24 is higher than the lower end of the first wind shield ring 13; there is a rotational gap between the upper housing 10 and the fan assembly; a stator is fixedly provided on the lower housing 50, and a rotor corresponding to the stator is fixedly provided inside the fan assembly; a plurality of upwardly extending connecting columns 51 are fixedly provided on the circumferential edge of the lower housing 50, and clamping parts 52 are provided at the upper ends of the connecting columns 51; connecting holes 14 are provided at the positions corresponding to the respective connecting columns 51 on the circumferential edge of the upper housing 10, and each clamping part 52 is respectively clamped in the corresponding connecting hole 14.

[0053] By providing a first wind shield ring 13 on the side of the air inlet 11 of the upper shell 10 close to the fan assembly, and providing a second wind shield ring 24 at the position of the fan assembly corresponding to the first wind shield ring 13, the second wind shield ring 24 is located outside the first wind shield ring 13, and the upper end of the second wind shield ring 24 is higher than the lower end of the first wind shield ring 13. The first wind shield ring 13 and the second wind shield ring 24 cooperate with each other to be able to guide the airflow to flow more concentratedly towards the fan assembly, reduce the airflow disorder, enable the airflow to enter more smoothly, and reduce the dispersion and loss of the airflow, ensure that more air enters, and improve the air volume; and the cooperation between the first wind shield ring 13 and the second wind shield ring 24 can reduce the pressure loss caused by the pressure difference between the air inlet 11 and the side air outlets 28 on each side, thereby improving the ventilation air volume and air pressure, and assisting in improving the driving comfort; with the upper end as the air inlet 11 and a butterfly structure with a plurality of side air outlets 28 provided on its side, it can generate a large air volume and air pressure, quickly suck in air through the upper air inlet 11, and then strongly discharge it from the side air outlets 28, which can accelerate the air circulation inside the seat, and there are no other components blocking the side air outlets 28 on its side except for the connecting columns 51 used for connecting the upper shell 10 and the lower shell 50, so that the air outlet is smoother.

[0054] Among them, the related structural description of the upper shell 10:

[0055] Specifically, a groove can also be provided at the position of the upper shell 10 corresponding to the second wind shield ring 24 on the side close to the fan assembly, so as to provide more accommodation space for the upper end of the second wind shield ring 24.

[0056] Specifically, a plurality of reinforcing ribs 12 are fixedly arranged in the air inlet 11 of the upper shell 10.

[0057] Among them, the related structural description of the fan assembly:

[0058] In an alternative solution of this embodiment, preferably, such as Figure 2 、 Figures 4 to 7As shown in the figure, the fan assembly includes a fan wheel 20, a shaft rod 30, an elastic element 31 and a shaft stopper 34; an upper inlet is provided at the upper end of the fan wheel 20, and side air outlets 28 are provided on the side wall of the fan wheel 20; in the vertical direction, the upper end of the shaft rod 30 is fixedly connected to the fan wheel 20, and the lower end of the shaft rod 30 extends downward; a sleeve assembly is fixedly provided on the lower shell 50, the sleeve assembly has an installation channel, and the lower end of the shaft rod 30 is rotatably connected in the installation channel; a clamping groove 301 is provided on the side wall of the lower end of the shaft rod 30 extending out of the installation channel, and the shaft stopper 34 is clamped in the clamping groove 301; the elastic element 31 is sleeved on the shaft rod 30 between the fan wheel 20 and the installation channel, and the elastic element 31 is in a compressed state. The elastic element 31 can cooperate with the shaft stopper 34 to stably position the shaft rod 30 in the installation channel; and the elastic element 31 can reduce the vibration in the axial direction of the shaft rod 30, reduce the noise caused by the vibration and the unstable air flow caused by the vibration.

[0059] Specifically, the shaft rod 30 is made of high-strength steel.

[0060] Specifically, the elastic element 31 is a pagoda spring.

[0061] In an alternative embodiment of the present embodiment, preferably, as Figure 2 , Figures 4 to 7 and Figure 11 shown, the sleeve assembly includes a copper sleeve 35, an upper bearing 32 and a lower bearing 33; in the vertical direction, the copper sleeve 35 has an upper bearing installation groove, a communication hole and a lower bearing installation groove that are sequentially communicated; the inner diameter of the upper bearing installation groove and the inner diameter of the lower bearing installation groove are both larger than the inner diameter of the communication hole; the inner ring of the upper bearing 32 is fixedly sleeved on the shaft rod 30, and the outer ring of the upper bearing 32 is fixedly provided in the upper bearing installation groove; the inner ring of the lower bearing 33 is fixedly sleeved on the shaft rod 30, and the outer ring of the lower bearing 33 is fixedly provided in the lower bearing installation groove; the inner ring channel of the upper bearing 32, the communication hole and the inner ring channel of the lower bearing 33 together form an installation channel; the lower end of the elastic element 31 abuts against the inner ring end face of the upper bearing 32. The shaft rod 30 is rotatably connected to the copper bushing through the upper bearing 32 and the lower bearing 33, and its rotation is more flexible and convenient, reducing the rotational friction resistance, and can be used to support the weight of components such as the fan wheel 20 through the cooperation of the upper bearing 32 and the lower bearing 33 with the shaft rod 30 to ensure its stable rotation.

[0062] In an alternative embodiment of the present embodiment, preferably, as Figure 11 shown, in the axial direction of the shaft rod 30, the height of the clamping groove 301 is greater than the height of the shaft stopper 34. The height of the clamping groove 301 provided on the shaft rod 30 is greater than the height of the shaft stopper 34, which can adjust the gap size between the upper end of the fan wheel 20 fixedly connected to the shaft rod 30 and the upper shell 10 by replacing shaft stoppers 34 of different thicknesses.

[0063] In an alternative solution of this embodiment, preferably, as Figure 11 shown, an upper bearing limiting surface 321 is provided at the connection between the upper bearing mounting groove and the communication hole; a lower bearing limiting surface 331 is provided at the connection between the lower bearing mounting groove and the communication hole; in the axial direction of the shaft rod 30, the lower end of the upper bearing 32 contacts the upper bearing limiting surface 321, and the upper end of the lower bearing 33 contacts the lower bearing limiting surface 331. The upper bearing limiting surface 321 and the lower bearing limiting surface 331 can respectively limit the mounting positions of the upper bearing 32 and the lower bearing 33, thereby ensuring the stability of the mounting positions of the shaft rod 30 and the fan wheel 20.

[0064] In an alternative solution of this embodiment, preferably, as Figure 7 and Figure 8 shown, the middle part of the fan wheel 20 has a resting groove 26 and a through hole 27. The resting groove 26 is located above the through hole 27 and the resting groove 26 communicates with the through hole 27; a pressing joint 36 is provided at the upper end of the shaft rod 30, and external convex teeth are provided on the outer side wall of the pressing joint 36; the shaft rod 30 is inserted into the resting groove 26 and the through hole 27, and the pressing joint 36 of the shaft rod 30 is located in the resting groove 26; a connecting material is filled in the resting groove 26, and the connecting material can fixedly connect the pressing joint 36 and the fan wheel 20 together. The pressing joint 36 at the upper end of the shaft rod 30 is provided with external convex teeth on its outer side wall, which can be embedded in the resting groove 26 of the fan wheel 20, thereby enhancing the fixed connection strength between the shaft rod 30 and the fan wheel 20, making the fan wheel 20 more stable during high-speed rotation, having better dynamic balance, and reducing noise.

[0065] Specifically, the pressing joint 36 is in a plum blossom shape and is embedded in the injection molded part, increasing the injection molding strength of the shaft rod 30, so that it is more stable during high-speed rotation, has better dynamic balance, and can reduce noise.

[0066] In an alternative solution of this embodiment, preferably, as Figure 4 and Figure 6 shown, a plurality of dynamic balance mounting grooves 25 are provided on the fan wheel 20, and dynamic balance blocks are fixedly installed in the respective dynamic balance mounting grooves 25. The dynamic balance mounting grooves 25 provided on the fan wheel 20 can correct the dynamic balance of the fan wheel 20 and install the corresponding dynamic balance blocks, so that the fan wheel 20 reaches a balanced state and reduces the vibration of the fan wheel 20.

[0067] Specifically, the fan wheel 20 has an upper blade ring 21, a lower blade ring 23 and a plurality of blades 22. The upper blade ring 21 is located above the lower blade ring 23. The respective blades 22 are evenly distributed circumferentially around the lower blade ring 23 between the upper blade ring 21 and the lower blade ring 23, and the middle part of the lower blade ring 23 bulges upward, and a plurality of dynamic balance mounting grooves 25 are circumferentially provided on the protruding part; a plurality of dynamic balance mounting grooves 25 are circumferentially provided at the lower end of the lower blade ring 23.

[0068] Specifically, the dynamic balance installation groove 25 is used to install corresponding dynamic balance blocks to avoid problems such as abnormal noise and noise caused by its own reasons.

[0069] Specifically, the rotor is a magnetic ring 37, and the magnetic ring 37 is composed of an annular iron shell 371 and magnetic strips 372. The iron shell 371 is made of pure iron by stamping process, which has the functions of supporting the soft magnetic strips 372 inside and shielding the external magnetic field. The magnetic ring 37 is in interference fit with the inner groove of the convex part in the middle of the lower blade ring 23 of the fan wheel 20.

[0070] Among them, the relevant structural description of the lower shell 50:

[0071] In an alternative embodiment of the present invention, preferably, as Figure 2 , Figure 10 and Figure 12 shown, a PCB assembly is also fixedly arranged on the lower shell 50, the stator is fixedly arranged on the PCB assembly, and a plug-in part is arranged on the PCB assembly. The PCB assembly can accurately adjust the speed of the fan assembly, thereby providing a more flexible fan speed for the fan assembly, and thus providing a more accurate air intake volume; and the plug-in part arranged on the PCB assembly is convenient for connection and use.

[0072] In an alternative embodiment of the present invention, preferably, as Figure 10 and Figure 12 shown, the PCB assembly has a PCB board 40; a plurality of fixing holes 41 are arranged on the PCB board 40; fixing columns 53 are fixedly arranged at positions corresponding to the fixing holes 41 on the lower shell 50; the part of the fixing column 53 protruding through the fixing hole 41 can be melted to form a fixing connector, and the outer diameter of the fixing connector is larger than the inner diameter of the fixing hole 41. By using the method of matching the PCB board 40 with the fixing holes 41 through the fixing columns 53, and the upper end of the fixing column 53 can be melted to realize the fixed connection between the fixing column 53 and the fixing hole 41, the structure is simple and convenient for connection and fixation.

[0073] Specifically, a stator is arranged on the PCB board 40. The stator is a 6-pole silicon steel sheet fixed on the PCB board 40, and copper wires are wound on the stator. The winding coil of the stator is connected to the circuit board.

[0074] Specifically, the plug-in part arranged on the PCB assembly is a pin 42, and a socket 54 is arranged on the lower shell 50. The pin 42 is fixedly arranged in the socket 54.

[0075] Specifically, powered by the pin 42, under the control of the fan chip and other electrical components included in the PCB assembly, a changing magnetic field can be generated in the stator part.

[0076] Specifically, the stator is coaxially fixed with the magnetic ring 37. The magnetic field of the magnetic ring 37 is fixed, and the rotation of the magnetic ring 37 and the fan wheel 20 is driven by the change of the stator magnetic field.

[0077] Specifically, a receiving groove 55 is provided at a position on the lower case 50 corresponding to the PCB board 40.

[0078] Specifically, the fixing post 53 is a plastic cylinder. The upper end of the fixing post 53 can be melted by a plastic welding machine to form a mushroom-shaped fixed connection head, and the PCB board 40 is fixed on the lower case 50.

[0079] Specifically, an avoidance hole 56 is provided on the lower case 50 to provide an installation space for protruding components such as the stator and resistors and capacitors on the PCB board 40.

[0080] Among them, regarding other relevant setting descriptions:

[0081] In an alternative solution of this embodiment, preferably, as Figures 1 to 3 shown, the connecting post 51 has a through mounting hole 511. The provision of the through mounting hole 511 on the connecting post 51 facilitates its overall installation and provides an installation position for the overall installation.

[0082] Specifically, through the rotation of the fan wheel 20, air enters from the upper air inlet and flows out from the side air outlet 28 on the side. The upper case 10 and the lower case 50 are connected by four connecting posts 51, and the air flow at the side air outlet 28 is not affected by the remaining space, thereby increasing the air volume of the air intake.

[0083] Specifically, as Figure 13 shown, different upper cases 10 can also be matched, that is, the direction of the air inlet 11 on the upper case 10 is different, so as to connect with different inlet air and be applicable to different air intake working conditions.

[0084] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A butterfly-shaped suction fan, characterized in that: It includes an upper shell, a fan assembly and a lower shell which are arranged in sequence from top to bottom; The upper shell is provided with an air inlet; a first wind shielding ring is fixedly provided on one side of the air inlet close to the fan assembly; The fan assembly has an upper inlet and a plurality of side air outlets, the upper inlet is connected to each of the side air outlets, and each of the side air outlets is evenly distributed circumferentially around the axis of the fan assembly; a second wind shielding ring is fixedly arranged on the upper inlet; the inner diameter of the second wind shielding ring is greater than the outer diameter of the first wind shielding ring; and in the vertical direction, the upper end of the second wind shielding ring is higher than the lower end of the first wind shielding ring; a rotation gap is provided between the upper shell and the fan assembly; A stator is fixedly arranged on the lower shell, and a rotor corresponding to the stator is fixedly arranged in the fan assembly; A plurality of upwardly extending connecting columns are fixedly arranged on the circumferential edge of the lower shell, and a clamp is arranged on the upper end of the connecting column; connecting holes are arranged on the circumferential edge of the upper shell at positions corresponding to the connecting columns, and each clamp is respectively clamped in the corresponding connecting hole.

2. The butterfly suction fan according to claim 1, characterized in that: The fan assembly includes a fan wheel, a shaft, an elastic element and a shaft stop; The upper end of the fan wheel is provided with the upper inlet, and the side wall of the fan wheel is provided with the side air outlets; In the vertical direction, the upper end of the shaft is fixedly connected to the fan wheel, and the lower end of the shaft extends downward; A sleeve assembly is fixedly arranged on the lower shell, and the sleeve assembly has an installation channel, and the lower end of the shaft rod is rotatably connected in the installation channel; a slot is arranged on the side wall where the lower end of the shaft rod extends out of the installation channel, and the shaft stopper is clamped in the slot; The elastic element is sleeved on the shaft between the fan wheel and the mounting channel, and the elastic element is in a compressed state.

3. The butterfly suction fan according to claim 2, characterized in that: The sleeve assembly includes a copper sleeve, an upper bearing and a lower bearing; In the vertical direction, the copper sleeve has an upper bearing installation groove, a connecting hole and a lower bearing installation groove which are connected in sequence; the inner diameter of the upper bearing installation groove and the inner diameter of the lower bearing installation groove are both larger than the inner diameter of the connecting hole; The inner ring of the upper bearing is fixedly sleeved on the shaft, and the outer ring of the upper bearing is fixedly arranged in the upper bearing installation groove; the inner ring of the lower bearing is fixedly sleeved on the shaft, and the outer ring of the lower bearing is fixedly arranged in the lower bearing installation groove; The inner ring channel of the upper bearing, the connecting hole and the inner ring channel of the lower bearing together form the installation channel; The lower end of the elastic element abuts against the inner ring end surface of the upper bearing.

4. The butterfly suction fan according to claim 2, characterized in that: In the axial direction of the shaft rod, the height of the slot is greater than the height of the shaft stop.

5. The butterfly suction fan according to claim 3, characterized in that: An upper bearing limiting surface is provided at the connection between the upper bearing installation groove and the communicating hole; a lower bearing limiting surface is provided at the connection between the lower bearing installation groove and the communicating hole; In the axial direction of the shaft, the lower end of the upper bearing contacts the upper bearing limiting surface, and the upper end of the lower bearing contacts the lower bearing limiting surface.

6. The butterfly suction fan according to claim 2, characterized in that: The fan wheel is provided with a plurality of dynamic balancing installation grooves, each of which is used for fixing and installing a dynamic balancing block.

7. The butterfly suction fan according to claim 1, characterized in that: A PCB assembly is also fixedly arranged on the lower shell, the stator is fixedly arranged on the PCB assembly, and a plug-in connector is arranged on the PCB assembly.

8. The butterfly suction fan according to claim 7, characterized in that: The PCB assembly comprises a PCB board; The PCB board is provided with a plurality of fixing holes; A fixing column is fixedly arranged at a position corresponding to each fixing hole on the lower shell; the portion of the upper end of the fixing column that passes through the fixing hole can be melted to form a fixing connector, and the outer diameter of the fixing connector is larger than the inner diameter of the fixing hole.

9. The butterfly suction fan according to claim 1, characterized in that: The connecting column has a penetrating mounting hole.

10. The butterfly suction fan according to claim 2, characterized in that: The fan wheel has a resting groove and a through hole in the middle, wherein the resting groove is located above the through hole and the resting groove is connected to the through hole; The upper end of the shaft is provided with a press joint, and the outer side wall of the press joint is provided with external protruding teeth; The shaft rod is inserted into the shelf groove and the through hole, and the crimping head of the shaft rod is located in the shelf groove; The shelf groove is filled with a connector, and the connector can fix the crimping head and the fan wheel together.

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