Motor direct-drive intelligent axial fan

Abstract

The present invention discloses a motor-direct-driven intelligent axial flow fan, comprising a housing assembly, a drive assembly, and a rotating assembly. The drive assembly comprises a central shaft, a stator, a permanent magnet rotor, an electromagnetic rotor, a first driving gear, a second driving gear, and at least one driven gear. The central shaft is mounted on the housing assembly. The permanent magnet rotor, the stator, and the electromagnetic rotor are sequentially sleeved on the central shaft. The first driving gear is sleeved on the outside of the permanent magnet rotor, the second driving gear is sleeved on the outside of the electromagnetic rotor, and the driven gear is arranged between the first driving gear and the second driving gear and meshes with the two respectively. The rotating assembly is arranged outside the drive assembly and is in transmission connection with at least one of the driven gears. The present invention can achieve the functions of blade angle adjustment and radial rotation simultaneously using only one motor through the first and second states of the drive assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a motor-direct-driven intelligent axial flow fan. Background Art

[0002] A motor-driven fan is a contactless driven fan that converts electrical energy directly into mechanical energy without the need for auxiliary devices. Its energy conversion and transmission is directly achieved by the operation of the electromagnetic field. Existing electromagnetic direct-drive fans generally have a low level of integration, and their implementation forms and methods are relatively simple. For example, Chinese patent application publication number CN116877461A discloses an integrated fan system consisting primarily of a base, a housing, a fan assembly, and a drive motor. This fan has a relatively simple structure, with fixed and non-adjustable blade angles and no explosion-proof or vibration-proof features, which significantly limits its application. Furthermore, the fan generates a large amount of heat during operation, and this technology does not utilize efficient cooling and heat dissipation structures and materials. Consequently, excessive temperatures can lead to decreased fan performance and low operating efficiency. Furthermore, this technology does not provide an intelligent control system for the fan, making it impossible to monitor the fan's operating conditions in real time.

[0003] In response to the above technical problems, the Chinese utility model patent with publication number CN218991957U discloses a multi-blade axial flow fan blade, which is mainly composed of a mounting box and a blade. A mounting sleeve is welded to the inner surface of the mounting box, a rotating shaft is embedded in the inner surface of the mounting sleeve, a mounting block is welded to the outer surface of the rotating shaft, the blade is welded to the outer surface of the mounting block, a connecting plate is welded to the outer surface of the rotating shaft, a driven gear is welded to the outer surface of the connecting plate, a rotating frame is welded to the inner surface of the mounting box, and a rotating groove is provided on the inner surface of the rotating frame. However, this driven structure is relatively complex. When adjusting the blade angle, a new mechanical structure and two or more motors are required. It is impossible to achieve the self-adjustment of the blade angle and the radial rotation of the impeller with only one motor. There is no intelligent integrated system, so the required angle cannot be accurately adjusted, and the working condition of the fan cannot be monitored in real time. Therefore, the field lacks a fan that can achieve multi-functions, intelligent reliability, strong adaptability and high operating efficiency with a single motor. Summary of the Invention

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the present invention proposes a motor-direct-driven intelligent axial flow fan, which mainly solves the technical problem that the prior art cannot use one motor to simultaneously achieve blade angle self-adjustment and impeller rotation functions.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] A motor-direct-driven intelligent axial flow fan, comprising:

[0007] Housing assembly;

[0008] Drive components, including:

[0009] A central shaft, a stator, a permanent magnet rotor, an electromagnetic rotor, a first driving gear, a second driving gear, and at least one driven gear. The central shaft is mounted on a housing assembly. The permanent magnet rotor, the stator, and the electromagnetic rotor are sequentially sleeved on the central shaft. The first driving gear is sleeved on the outside of the permanent magnet rotor. The second driving gear is sleeved on the outside of the electromagnetic rotor. The driven gear is disposed between the first driving gear and the second driving gear and meshes with both.

[0010] a rotating assembly, disposed outside the driving assembly and in transmission connection with at least one of the driven gears;

[0011] The driving assembly has a first state and a second state. When the driving assembly is in the first state, the electromagnetic rotor is configured to have a polarity opposite to that of the permanent magnet rotor, so that the first driving gear and the second driving gear rotate in opposite directions, thereby driving the driven gear to rotate on its own to achieve angle adjustment of the rotating assembly; when the driving assembly is in the second state, the electromagnetic rotor is configured to have a polarity the same as that of the permanent magnet rotor, so that the first driving gear and the second driving gear rotate in the same direction, thereby driving the driven gear and the following gear to achieve rotation of the rotating assembly.

[0012] In some embodiments, an adsorption component is further included, which is arranged inside the rotating component. The adsorption component includes a first adsorption component, which includes a first adsorption component, which includes an electromagnet, an iron foil, a gear bar and a ratchet. The ratchet is sleeved on the central shaft and is located on the side of the first driving gear away from the driven gear. The electromagnet is sleeved on the outside of the ratchet. The gear bar and iron foil are sequentially sleeved on the central shaft and embedded in the first driving gear.

[0013] In some embodiments, the first adsorption assembly further includes an elastic member, which is sleeved on the central shaft and has one end connected to the stator and the other end connected to the first driving gear.

[0014] In some embodiments, the adsorption assembly further includes a second adsorption assembly, comprising a second electromagnet, a second iron foil, a second gear bar, and a second ratchet. The second ratchet is sleeved on the central shaft and located on a side of the second driving gear away from the driven gear. The second electromagnet is sleeved on the exterior of the second ratchet. The second gear bar and the second iron foil are sleeved on the central shaft in sequence and embedded in the interior of the second driving gear.

[0015] In some embodiments, the second adsorption assembly further includes a second elastic member, which is sleeved on the central shaft and has one end connected to the stator and the other end connected to the second driving gear.

[0016] In some embodiments, the rotating assembly includes a hub, a driven shaft and blades. The hub is arranged outside the driving assembly and is rotatably connected to the central shaft. One end of the driven shaft passes through the hub and is transmission-connected to the driven gear, and the other end of the driven shaft is fixedly connected to the blades.

[0017] In some embodiments, the shell assembly includes a base, a support frame, a protective shell and an explosion-proof net. The support frame is fixed to the upper surface of the base, the protective shell is fixed to the top of the support frame, the explosion-proof net is fixed to both sides of the protective shell, and the two ends of the central axis are installed in the center of the explosion-proof nets on both sides.

[0018] In some embodiments, a noise reduction component is further included, and the noise reduction component is installed outside the protective shell.

[0019] In some embodiments, a control assembly is further included, and the control assembly includes a control box and a control device. The control box is arranged on the lower surface of the base, and the control device is arranged in the control box.

[0020] In some embodiments, a hollow structure is formed on the first driving gear, the second driving gear and the driven gear.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention designs a drive assembly with a first state and a second state. When in the first state, the electromagnet rotor is configured to have a polarity opposite to that of the permanent magnet rotor, causing the first and second driving gears to rotate in opposite directions. This can drive the driven gear to rotate and achieve angle adjustment of the rotating assembly. When the drive assembly is in the second state, the electromagnet rotor is configured to have a polarity identical to that of the permanent magnet rotor, causing the first and second driving gears to rotate in the same direction. This can drive the driven gear and its follower to achieve rotation of the rotating assembly. Therefore, the present invention achieves the goal of a single motor with multiple functions. Only one motor can simultaneously adjust the angle of the fan blades and drive the radial rotation of the fan blades, thereby improving energy utilization and increasing the operating efficiency of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a general structural diagram of the fan in one direction of the present invention;

[0024] Figure 2 This is a general structural diagram of the fan of the present invention in another direction;

[0025] Figure 3 is a schematic structural diagram of the drive assembly of the present invention;

[0026] Figure 4 is an exploded view of the drive assembly of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the rotating assembly of the present invention in one direction;

[0028] Figure 6 This is a schematic structural diagram of the rotating assembly of the present invention in another direction;

[0029] Figure 7 is a cross-sectional view of the drive assembly and the wheel hub of the present invention after installation;

[0030] Figure 8 This is a schematic structural diagram of the first driving gear in one direction of the present invention;

[0031] Figure 9 This is a schematic structural diagram of the first driving gear in another direction of the present invention;

[0032] The following are the descriptions of the reference numerals:

[0033] 100, housing assembly, 110, base, 120, support frame, 130, protective shell, 140, explosion-proof net;

[0034] 200 , drive assembly, 210 , central shaft, 220 , stator, 230 , permanent magnet rotor, 240 , electromagnet rotor, 250 , first driving gear, 260 , second driving gear, 270 , driven gear;

[0035] 300, rotating assembly, 310, hub, 320, driven shaft, 330, blade;

[0036] 400, adsorption assembly, 410, first adsorption assembly, 411, first electromagnet, 412, first iron foil, 413, first gear, 414, first ratchet, 415, first elastic member, 420, second adsorption assembly, 421, second electromagnet, 422, second iron foil, 423, second gear, 424, second ratchet, 425, second elastic member;

[0037] 500, noise reduction component;

[0038] 600, control assembly, 610, control box, 620, control panel, 630, switch. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The present invention mainly addresses the technical problems that existing axial flow fans need to design some new mechanical structures and use two or more motors to achieve the function of blade angle adjustment, which leads to complex fan structure and low operating efficiency. The present invention proposes a motor direct-driven intelligent axial flow fan, which is a multi-functional and intelligent fan that uses a single motor.

[0041] like Figures 1-2 As shown, the present invention provides a motor-direct-driven intelligent axial flow fan, including a housing assembly 100, a drive assembly 200 and a rotating assembly 300. The drive assembly 200 and the rotating assembly 300 are installed on the housing assembly 100, and the drive assembly 200 is arranged inside the rotating assembly 300. The drive assembly 200 is designed with a first state and a second state. The first state is used to adjust the angle of the rotating assembly 300, and the second state is used to drive the rotating assembly 300 to rotate radially.

[0042] Among them, such as Figures 3-4 As shown, the driving assembly 200 includes a central shaft 210, a stator 220, a permanent magnet rotor 230, an electromagnet rotor 240, a first driving gear 250, a second driving gear 260 and at least one driven gear 270. The central shaft 210 is mounted on the housing assembly 100. The permanent magnet rotor 230, the stator 220 and the electromagnet rotor 240 are sequentially sleeved on the central shaft 210. The first driving gear 250 is sleeved on the outside of the permanent magnet rotor 230. The second driving gear 260 is sleeved on the outside of the electromagnet rotor 240. The driven gear 270 is arranged between the first driving gear 250 and the second driving gear 260 and is meshed with the two at both ends. The rotating assembly 300 is transmission-connected to at least one of the driven gears 270.

[0043] In the above technical solution, the electromagnetic rotor 240 is configured to have an opposite polarity to the permanent magnet rotor 230, so that the first driving gear 250 and the second driving gear 260 rotate in opposite directions, thereby driving the driven gear 270 to rotate to achieve angle adjustment of the rotating assembly 300. This is the first state of the driving assembly 200; when the electromagnetic rotor 240 is configured to have the same polarity as the permanent magnet rotor 230, the first driving gear 250 and the second driving gear 260 rotate in the same direction, thereby driving the driven gear 270 to follow it to achieve rotation of the rotating assembly 300. This is the second state of the driving assembly 200. The angle adjustment function of the rotating assembly 300 can be achieved by the first state of the driving assembly 200, and the rotation function of the rotating assembly 300 can be achieved by the second state of the driving assembly 200. It can be seen that the present invention realizes the functions of angle adjustment and radial rotation simultaneously using only one motor, simplifies the fan structure, and improves the operating efficiency of the fan.

[0044] In one embodiment, the driving assembly 200 is further provided with ventilation holes and heat sinks to achieve heat dissipation.

[0045] In one embodiment, the axial flow fan further includes an adsorption component 400 , and the adsorption component 400 is disposed inside the rotating component 300 .

[0046] In one embodiment, the adsorption component 400 includes a first adsorption component 410 and a second adsorption component 420, and the first adsorption component 410 and the second adsorption component 420 are respectively used to adsorb the first driving gear 250 and the second driving gear 260 to reduce the speed of the first driving gear 250 and the second driving gear 260 to zero, thereby enabling the driving component 200 to switch between the first state and the second state.

[0047] In one embodiment, the first adsorption component 410 includes a first electromagnet 411, a first iron foil 412, a first gear bar 413 and a first ratchet 414. The first ratchet 414 is sleeved on the central shaft 210 and is located on the side of the first driving gear 250 away from the driven gear 270. The first electromagnet 411 is sleeved on the outside of the first ratchet 414. The first gear bar 413 and the first iron foil 412 are sleeved on the central shaft 210 in sequence and embedded in the first driving gear 250.

[0048] In one embodiment, the first adsorption assembly further includes a first elastic member 415 . The first elastic member 415 is sleeved on the central shaft 210 and has one end connected to the stator 220 and the other end connected to the first driving gear 250 .

[0049] In one embodiment, the second adsorption assembly 420 includes a second electromagnet 421, a second iron foil 422, a second gear bar 423 and a second ratchet 424. The second ratchet 424 is sleeved on the central shaft 210 and is located on the side of the second driving gear 260 away from the driven gear 270. The second electromagnet 421 is sleeved on the outside of the second ratchet 424. The second gear bar 423 and the second iron foil 422 are sequentially sleeved on the central shaft 210 and embedded in the inside of the second driving gear 260.

[0050] In one embodiment, the second adsorption assembly 420 further includes a second elastic member 425 . The second elastic member 425 is sleeved on the central shaft 210 and has one end connected to the stator 220 and the other end connected to the second driving gear 260 .

[0051] In one embodiment, Figures 5 to 9As shown, the rotating assembly 300 includes a hub 310, a driven shaft 320 and a blade 330. The hub 310 is arranged outside the driving assembly 200 and is rotatably connected to the central shaft 210. One end of the driven shaft 320 passes through the hub 310 and is transmission-connected to the driven gear 270, and the other end of the driven shaft 320 is fixedly connected to the blade 330.

[0052] In one embodiment, the blade 330 is made of aluminum alloy, which reduces density, weight, and cost while enhancing the ability to bear the aerodynamic load of the wind blade, thereby reducing the fatigue load of the blade 330 and improving fatigue life; the first driving gear 250, the second driving gear 260 and the driven gear 270 are all formed with a hollow structure for material reduction processing. Without affecting the original stress structure of the mechanical structure, the gear structure is hollowed out to the maximum extent possible, and lightweight processing is performed under the premise of ensuring the safety and stability of the fan operation.

[0053] In one embodiment, the blades 330 are treated with polyurethane coating for corrosion protection. The water-based polyurethane coating forms a dense coating upon curing on the surface of the coated object. This coating effectively isolates the substrate from the corrosive environment, preventing water, oxygen, and other potentially corrosive substances from contacting the protected surface. Polyurethane itself has excellent chemical resistance and is resistant to attack by a variety of chemicals, making it an excellent performer in chemically corrosive environments. Polyurethane also exhibits excellent strain resistance, maintaining the coating's continuity and protective capabilities even when the object deforms. The mechanical structure within the hub is treated with Dacromet technology for corrosion protection. The Dacromet coating primarily consists of metallic zinc flakes, aluminum flakes, and chromic acid. These materials form a chemically inert structure within the coating, effectively resisting attack by various chemicals. The thin layer formed on the metal substrate acts as a physical barrier, isolating oxygen and moisture, reducing their direct contact with the metal surface, thereby slowing the corrosion process. Finally, the zinc and aluminum act as sacrificial anodes, undergoing oxidation reactions before iron during the corrosion process, thus protecting the iron substrate from corrosion. This significantly improves the performance of the wind turbine in humid, high-salt environments at sea.

[0054] In one embodiment, the housing assembly 100 includes a base 110, a support frame 120, a protective shell 130 and an explosion-proof net 140. The support frame 120 is fixed to the upper surface of the base 110, the protective shell 130 is fixed to the top of the support frame 120, the explosion-proof net 140 is fixed to both sides of the protective shell 130, and the two ends of the central axis 210 are installed in the center of the explosion-proof net 140 on both sides.

[0055] In one embodiment, the axial flow fan further includes a noise reduction component 500 , and the noise reduction component 500 is installed outside the protective shell 130 .

[0056] In one embodiment, the noise reduction component 500 is a noise reduction sound. The noise reduction sound first receives the noise generated by the rotation of the fan with a microphone through a computer algorithm, and then uses the internal chip of the speaker to generate sound waves opposite to the noise to offset the fan noise, block the propagation of noise in the medium, and achieve the purpose of reducing the fan noise.

[0057] In one embodiment, the axial flow fan further includes a control assembly 600 , which includes a control box 610 and a control device. The control box 610 is disposed on the lower surface of the base 110 , and the control device is disposed in the control box 610 .

[0058] In one embodiment, the control device includes a control panel 620 and a switch 630. The control device also includes remote management and data acquisition. The remote management relies on a host computer and uses WinCC industrial automation software to achieve remote centralized management, real-time monitoring, and fault alarm mechanisms. The control panel 620 uses a programmable logic controller (PLC) to accurately control the operating status of field equipment through input and output modules. The data acquisition uses high-sensitivity sensors to capture and promptly collect and process various signals. The remote monitoring system has powerful fault diagnosis capabilities, capable of real-time analysis of equipment operating data, accurately identifying potential safety hazards and fault points. Once a fault is detected, the system will immediately display the fault information on the host computer and trigger an alarm mechanism, effectively improving the reliability of equipment operation. The design of the mechanical structure uses computer algorithms to ensure high-precision coordination between mechanical parts. At the same time, through algorithmic control, the highly integrated motor blade system achieves smooth transitions between multiple motion modes. The adjustment of the axial motor uses computer algorithms to accurately control the speed of the rotor group, thereby achieving precise adjustment of the axial motor power and precise control of on / off, thereby realizing highly intelligent operation of the fan and real-time monitoring and intelligent adjustment of the motor fan operating status.

[0059] The working principle of the present invention is as follows:

[0060] Turn on the switch 630 and first adjust the angle of the blade 330: AC power is supplied to the stator 220 and the electromagnet rotor 240. At this time, the adsorption assembly 400 is not energized. When a sinusoidal current is supplied to the electromagnet rotor 240, the polarity of the electromagnet rotor 240 and the permanent magnet rotor 230 are set to be opposite. The electromagnet rotor 240 and the permanent magnet rotor 230 rotate in opposite directions, thereby driving the first driving gear 250 and the second driving gear 260 to rotate in opposite directions. The driven gear 270 meshing with the first driving gear 250 and the second driving gear 260 rotates, thereby driving the blade 330 to rotate via the driven shaft 320 to adjust the angle.

[0061] When the blade 330 rotates to a desired angle, the first electromagnet 411 and the second electromagnet 421 are energized, attracting the first iron foil 412 and the second iron foil 422 on the upper surfaces of the first driving gear 250 and the second driving wheel 260, while overcoming the elastic force of the first elastic member 415 and the second elastic member 425 to perform work. At this time, the stator 220 coil is not energized, the first gear bar 413 on the upper surface of the first driving gear 250 is meshed with the first ratchet 414, and the second gear bar 423 on the upper surface of the second driving gear 260 is meshed with the second ratchet 424. Due to the unidirectional rotation characteristics of the first ratchet 414 and the second ratchet 424, the angular velocity of the first driving gear 250 and the second driving gear 260 can be reduced. When the angular velocity of the first driving gear 250 and the second driving gear 260 is reduced to zero, the driving assembly 200 changes from the first state to the second state, performing the function of driving the blade 330 to rotate radially.

[0062] Furthermore, a Hall sensor is used to accurately monitor the rotor positions of the permanent magnet rotor 230 and the electromagnetic rotor 240. When different magnetic poles of the rotor approach the Hall sensor, the Hall sensor will output a corresponding position signal according to the change in the magnetic field. By continuously monitoring the change in the potential difference generated during the movement of the rotor, the rotor speed can be accurately calculated. During the operation of the fan, once the Hall sensor detects that the angular velocity of the first driving gear 250 and the second driving gear 260 has decreased to zero, the system will trigger the electromagnetic rotor 240 to pass cosine alternating current, so that the electromagnetic rotor 240 and the permanent magnet rotor 230 have the same polarity. Then, the speed of the permanent magnet rotor 230 is measured again by the Hall sensor, and the magnetic field strength of the permanent magnet rotor 230 is accurately calculated in combination with the magnitude of the alternating current in the stator coil. After receiving these signals, the controller will process them and issue instructions to adjust the current magnitude in the coils of the first electromagnet 411 and the second electromagnet 421. During this process, changes in current cause changes in the strength and direction of the magnetic fields generated by the first and second electromagnets 411 and 421, thereby generating an attractive or repulsive force on the rotor, causing it to move to a predetermined position or change its motion state. On this basis, the system adjusts the magnetic field strengths of the first and second electromagnets 411 and 421 to be completely symmetrical with the permanent magnet rotor 230. The first and second electromagnets 411 and 421 are de-energized, and the first driving gear 250 re-engages with the driven gear 270 under the elastic force of the first elastic member 415. The second driving gear 260 also re-engages with the driven gear 270 under the elastic force of the second elastic member 425. At this point, alternating current is again applied to the stator coil, causing the permanent magnet rotor 230 and the first and second driving gears 250 and 260, where the electromagnetic rotor 240 is located, to rotate at the same angular velocity and in the same direction. During this process, the driven gear 270 is tightly fixed between the first and second driving gears 250 and 260, achieving a relative static state between the three, thereby achieving smooth operation of the fan.

[0063] In summary, the motor-driven intelligent axial flow fan provided by the present invention has the following beneficial effects:

[0064] 1. The present invention realizes the functions of blade angle adjustment and blade radial rotation simultaneously with only one motor. The whole structure is simple and reliable, which improves the operating efficiency of the fan.

[0065] 2. The present invention realizes intelligent control of the fan, solving the problems of rapid fan loss, loud operating noise, slow heat dissipation and low intelligence level;

[0066] 3. The present invention adopts aluminum alloy blades, which improves the overall strength of the blades while reducing the weight, reduces the fatigue load of the blades, and increases the service life of the blades;

[0067] 4. The present invention solves the problems of high noise, vibration and heat during the operation of the fan through the overall stable structure, ventilation holes and heat sinks inside the motor, meets the explosion-proof requirements, and at the same time achieves lightweighting of the fan and reduces fan loss, thereby extending its service life while ensuring the strength and safety of the fan.

[0068] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A motor-driven intelligent axial flow fan, characterized in that: include: Housing assembly; Drive components, including: A central shaft, a stator, a permanent magnet rotor, an electromagnetic rotor, a first driving gear, a second driving gear, and at least one driven gear. The central shaft is mounted on a housing assembly. The permanent magnet rotor, the stator, and the electromagnetic rotor are sequentially sleeved on the central shaft. The first driving gear is sleeved on the outside of the permanent magnet rotor. The second driving gear is sleeved on the outside of the electromagnetic rotor. The driven gear is disposed between the first driving gear and the second driving gear and meshes with both. a rotating assembly, disposed outside the driving assembly and in transmission connection with at least one of the driven gears; The driving assembly has a first state and a second state. When the driving assembly is in the first state, the electromagnetic rotor is configured to have a polarity opposite to that of the permanent magnet rotor, so that the first driving gear and the second driving gear rotate in opposite directions, thereby driving the driven gear to rotate on its own to achieve angle adjustment of the rotating assembly; when the driving assembly is in the second state, the electromagnetic rotor is configured to have a polarity the same as that of the permanent magnet rotor, so that the first driving gear and the second driving gear rotate in the same direction, thereby driving the driven gear and the following gear to achieve rotation of the rotating assembly.

2. The motor-driven intelligent axial flow fan according to claim 1, characterized in that: It also includes an adsorption component, which is arranged inside the rotating component and includes: The first adsorption component includes a first electromagnet, a first iron foil, a first gear bar and a first ratchet. The first ratchet is sleeved on the central shaft and is located on the side of the first driving gear away from the driven gear. The first electromagnet is sleeved on the outside of the first ratchet. The first gear bar and the first iron foil are sleeved on the central shaft in sequence and embedded in the inside of the first driving gear.

3. The motor-direct-driven intelligent axial flow fan according to claim 2, characterized in that: The first adsorption assembly further includes a first elastic member, which is sleeved on the central shaft and has one end connected to the stator and the other end connected to the first driving gear.

4. The motor-direct-driven intelligent axial flow fan according to claim 3, characterized in that: The adsorption assembly further includes a second adsorption assembly, and the second adsorption assembly includes: A second electromagnet, a second iron foil, a second gear bar and a second ratchet, wherein the second ratchet is sleeved on the central shaft and located on the side of the second driving gear away from the driven gear, the second electromagnet is sleeved on the outside of the second ratchet, and the second gear bar and the second iron foil are sleeved on the central shaft in sequence and embedded in the inside of the second driving gear.

5. The motor-direct-driven intelligent axial flow fan according to claim 4, characterized in that: The second adsorption assembly further includes a second elastic member, which is sleeved on the central shaft and has one end connected to the stator and the other end connected to the second driving gear.

6. The motor-direct-driven intelligent axial flow fan according to claim 1, characterized in that: The rotating assembly includes a hub, a driven shaft and blades. The hub is arranged outside the driving assembly and is rotatably connected to the central shaft. One end of the driven shaft passes through the hub and is transmission-connected to the driven gear, and the other end of the driven shaft is fixedly connected to the blades.

7. The motor-direct-driven intelligent axial flow fan according to claim 1, characterized in that: The shell assembly includes a base, a support frame, a protective shell and an explosion-proof net. The support frame is fixed to the upper surface of the base, the protective shell is fixed to the top of the support frame, the explosion-proof net is fixed to both sides of the protective shell, and the two ends of the central axis are installed in the center of the explosion-proof nets on both sides.

8. The motor-direct-driven intelligent axial flow fan according to claim 7, characterized in that: It also includes a noise reduction component, which is installed outside the protective shell.

9. The motor-direct-driven intelligent axial flow fan according to claim 7, characterized in that: It also includes a control component, which includes a control box and a control device. The control box is arranged on the lower surface of the base, and the control device is arranged in the control box.

10. The motor-direct-driven intelligent axial flow fan according to claim 1, characterized in that: The first driving gear, the second driving gear and the driven gear are all formed with a hollow structure.

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