Fan with inverted waterproof and dust protection structure
By incorporating a labyrinthine protective structure and a spring-loaded buffer system into the fan, the problem of insufficient resistance to rain and dust in outdoor environments is solved, thereby enhancing the fan's stability and extending its lifespan, and ensuring reliable heat dissipation for the equipment.
Patent Information
- Application Number
- CN202520087276.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-15
AI Technical Summary
Traditional cooling fans lack the ability to resist rain and dust in outdoor environments, leading to bearing corrosion and performance degradation, which affects the safe operation of the equipment.
A fan with an inverted waterproof and dust protection structure was designed. By setting a labyrinth-like structure with grooves inside the frame and protrusions outside the blades on the outer frame and fan blades, dust and rainwater are prevented from entering the fan. Springs and bearings are used to buffer external impacts and enhance anti-interference ability.
It effectively prevents sand and rainwater from entering, reduces the risk of component wear, improves the stability and lifespan of the fan, ensures continuous and reliable heat dissipation of the equipment, and enhances its shock resistance.
Smart Images
Figure CN223594477U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of radiating fan, specifically relates to a fan with waterproof and sand protection structure of upside-down. BACKGROUND
[0002] Radiating fan is widely used in many fields, and is the key component for stable operation of electronic equipment, and many electronic equipment such as outdoor communication base station, intelligent traffic signal lamp and various equipment in industrial production scene need to work in harsh environment.
[0003] Especially in industrial equipment, such as the radiating fan of equipment such as energy storage cabinet / grid-connected photovoltaic inverter, often needs to be upside-down on the equipment for use, the traditional radiating fan only includes basic radiating function, when the equipment is fixed and placed outdoors, the traditional radiating fan upside-down on the industrial equipment is in the face of rainy weather and sand weather, rain and sand can invade the fan and corrode the bearing, so that the bearing is damaged, finally the performance and service life of the fan are affected, and the operation safety of the industrial equipment is also harmed.
[0004] The traditional radiating fan lacks the ability to resist rain and sand and other external interference factors, and currently an urgent need exists for a radiating fan capable of resisting rain and sand and other external interference factors. INVENTION CONTENTS
[0005] In order to overcome the defects of the prior art, the utility model provides a fan with waterproof and sand protection structure of upside-down, to solve the problem of the lack of ability of the radiating fan in the prior art to resist rain and sand and other external interference factors.
[0006] One scheme of the utility model provides a fan with waterproof and sand protection structure of upside-down, which comprises an outer frame body, a fan shell and a fan blade, the fan shell comprises a shell base, the fan shell is installed on the outer frame body through the shell base, and the fan blade is installed on the fan shell.
[0007] A frame inner groove and a frame outer protrusion are formed on the outer frame body, a fan blade outer groove and a fan blade inner protrusion are formed on the fan blade, the frame inner groove is matched with the fan blade inner protrusion, the fan blade outer groove is matched with the frame outer protrusion, and the height of the frame inner groove is lower than that of the shell base.
[0008] It should be noted that although the frame inner groove and the fan blade inner protrusion, and the fan blade outer groove and the frame outer protrusion are matched, they do not contact each other.
[0009] When the fan is working normally, due to the matching and small gap between the groove and the protrusion, even if the fan is disturbed by external unstable airflow impact, equipment operation vibration transmission or occasional human error, the fan blade can still rotate stably along the established "track" without contacting the groove and protrusion wall, effectively inhibiting the swing amplitude of the fan blade, greatly ensuring the concentricity of the fan rotating shaft, making the air supply uniform and stable, providing continuous and reliable cooling air flow for the equipment, ensuring that the equipment operating temperature is always in the normal range, and preventing overheating failure caused by fan mechanical stability problems.
[0010] It is necessary to additionally point out that the height of the groove in the frame body is lower than the shell base, which can block the small particles such as dust in the external environment from invading the inside of the fan under the action of the airflow suction generated by the fan during daily work. The small particles are blocked by the height difference between the groove and the base, and then stay around the shell base, so they cannot directly cross into the core area, effectively preventing the accumulation of small particles at the internal precision components of the fan, reducing the risk of component wear caused by small particle friction, prolonging the service life of the components, and avoiding the problem of poor heat dissipation caused by the attachment of small particles, ensuring that the fan can still operate efficiently and stably in a small particle environment. Rain or water vapor can enter the outer frame through the gap between the groove in the frame and the protrusion in the fan blade, and the groove outside the fan blade and the protrusion outside the frame. It is almost impossible to contact the shell base, and it is impossible to further contact the internal precision components of the fan, reducing the risk of motor short circuit caused by rain or water vapor entering the fan.
[0011] In this scheme, by setting the groove in the frame and the protrusion in the fan blade, as well as the groove outside the fan blade and the protrusion outside the frame, and by setting the height of the groove in the frame to be lower than the shell base, a staggered labyrinth type protection structure is formed, which can improve the anti-interference ability of the fan to external unstable airflow impact, equipment operation vibration transmission or occasional human error, and can improve the anti-interference ability of the fan to external small particles including dust and liquid and gaseous water including rain, thereby improving the ability of the fan to resist external interference factors such as rain and dust, and enhancing the overall stability of the fan.
[0012] In one of the schemes, the fan shell includes a rotating shell, a core pipe and a driving assembly, the core pipe includes a rotating pipe body and a fixed pipe body, the rotating shell is installed on the rotating pipe body, and the fan blade is installed on the rotating shell.
[0013] In one of the schemes, a bearing is arranged inside the fixed pipe body, a rotating shaft is installed in the bearing, and the end of the rotating shaft is fixedly connected in the rotating pipe body.
[0014] In one of the schemes, one end of the spring is mounted on the bearing, and the other end of the spring is connected to the rotating pipe body;
[0015] It should be noted that when the fan receives external impact, the rotating pipe body and the fixed pipe body can cooperate with the spring to buffer and disperse external force, prevent stress concentration in the driving assembly, reduce the risk of damage to the core components, enhance the impact resistance, and ensure stable operation in complex environments;
[0016] It should be additionally noted that the bearing in the fixed pipe body mounts the rotating shaft and connects the rotating pipe body, which can reduce frictional resistance, make the fan blade rotate smoothly, thereby reducing energy loss and improving heat dissipation efficiency, reducing self-heating, prolonging the service life of components such as bearings and coils, and improving the reliability and durability of the fan as a whole;
[0017] In the present scheme, through the cooperation between the rotating shell, the rotating pipe body, the fixed pipe body, the bearing, the rotating shaft and the spring, the anti-interference ability of the fan to external impact can be further enhanced, so as to reduce the risk of damage to the core components of the fan and improve the reliability and durability of the fan as a whole.
[0018] In one of the schemes, the fixed pipe body is provided with a dismounting cover away from one end of the rotating pipe body.
[0019] It should be noted that the material of the dismounting cover can be silica gel, and the dismounting cover can be replaced by a silica gel plug. In this scheme, both the dismounting cover and the silica gel plug can prevent rainwater, water vapor or dust in the external environment from penetrating into the core pipe.
[0020] In the present scheme, by providing the dismounting cover, rainwater, water vapor or dust in the external environment can be prevented from penetrating into the core pipe, thereby enhancing the ability of the fan as a whole to resist external interference factors such as rainwater and dust.
[0021] In one of the schemes, the driving assembly is mounted outside the core pipe, the driving assembly includes a core and a coil, an insulating frame is mounted on the core, a coil is arranged on the insulating frame, and the coil is tightly wound on the core through the insulating frame.
[0022] In one of the schemes, a magnetic sleeve is mounted outside the core, the magnetic sleeve is attached to the inner wall of the rotating shell; the driving assembly further includes a PCB board mounted in the shell base, and a contact seat is arranged on the PCB board.
[0023] It should be noted that in the daily use process, the fan is also externally connected with an external energy supply device, the magnetic sleeve itself continuously generates a permanent magnetic field, when the external energy supply device works, there is current passing through the coil, and a magnetic field is generated around the coil, the magnetic field of the magnetic sleeve interacts with the magnetic field of the coil, the external energy supply device continuously provides direct current to the coil, thereby generating a coil magnetic field to drive the fan blade to rotate continuously;
[0024] It should be noted that the PCB board and the contact seat are provided with wiring terminals, and the PCB board and the contact seat are connected with the external power supply device through the wiring terminals.
[0025] In the scheme, the cooperation between the iron core, the coil and the magnetic sleeve can cooperate with the external power supply device, and the direct current provided by the external power supply device can drive the fan blade to rotate at high speed.
[0026] In one of the schemes, the rotating shell is also provided with a water outlet hole, and the water outlet hole penetrates the fan blade and communicates with the outside.
[0027] It should be noted that when there is unexpected rainwater or water vapor in the rotating shell, the water vapor will accumulate at the rotating shell and gradually change into liquid, and the rainwater will directly accumulate at the rotating shell. When the fan is in working condition, the liquid water converted from the water vapor and the rainwater will be discharged from the water outlet hole of the fan under the rotation of the rotating shell and the fan blade.
[0028] In the scheme, the water outlet hole is provided, which can cooperate with the rotating shell and the fan blade to discharge the liquid in the fan from the water outlet hole of the fan, thereby avoiding the risk of motor short circuit in the fan.
[0029] In one of the schemes, the rotating shell is provided with a clamping groove, and the fan blade is provided with a clamping protrusion. The fan blade is installed on the rotating shell through the clamping groove.
[0030] In the scheme, on the one hand, the connection between the fan blade and the rotating shell is enhanced, effectively preventing the fan blade from loosening or falling off due to centrifugal force, airflow impact or external vibration interference caused by high-speed rotation, ensuring the safety of the fan operation, avoiding equipment failure caused by the falling of the fan blade, on the other hand, the dynamic balance of the fan blade during rotation is precisely maintained, reducing vibration and noise caused by the destruction of the dynamic balance, further improving the stability and comfort of the fan operation, prolonging the service life of the fan, and ensuring the continuous and stable heat dissipation of the equipment.
[0031] In one of the schemes, the outer frame is provided with a disassembly gap, and the shell base is provided with a disassembly protrusion. The disassembly protrusion is located in the disassembly gap, and the shell base is installed in the outer frame through the disassembly protrusion.
[0032] It should be noted that when the fan needs to be maintained, repaired or replaced, the maintenance personnel can directly manually grab the disassembly protrusion and move the disassembly protrusion away from the disassembly gap, so as to directly disassemble the fan. The operation is simple and easy to operate, without the need for complex tools, and the separation of the fan can be quickly completed. The installation is achieved by grabbing the disassembly protrusion and moving it towards the disassembly gap and installing it.
[0033] In the scheme, by setting the disassembly gap and the disassembly protrusion, the fan shell part in the fan can be directly taken out by the staff, and the components in the fan shell are directly maintained, repaired or replaced, thereby improving the work efficiency of the daily maintenance, repair or replacement of the fan. BRIEF DESCRIPTION OF DRAWINGS
[0034] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor.
[0035] Figure 1 It is a whole structure schematic diagram of one embodiment of the fan with the inverted waterproof and dust protection structure in the present application;
[0036] Figure 2 It is a horizontal sectional view of the fan shell and the fan blade in the present application;
[0037] Figure 3 It is a vertical sectional view of the fan shell and the fan blade in the present application; Figure 1
[0038] Figure 4 It is a structure schematic diagram of the rotating shell in one embodiment of the fan with the inverted waterproof and dust protection structure in the present application;
[0039] Figure 5 It is a structure schematic diagram of the outer frame in one embodiment of the fan with the inverted waterproof and dust protection structure in the present application.
[0040] 1, outer frame; 11, frame inner groove; 12, frame outer protrusion; 13, disassembly gap; 2, fan shell; 21, shell base; 22, rotating shell; 221, clamping groove; 222, water outlet hole; 23, core pipe; 231, rotating pipe body; 232, fixed pipe body; 2321, bearing; 2322, rotating shaft; 2324, disassembly cover; 24, driving assembly; 241, iron core; 242, magnetic sleeve; 243, PCB board; 25, disassembly protrusion; 3, fan blade; 31, fan blade outer groove; 32, fan blade inner protrusion; 33, clamping protrusion. DETAILED DESCRIPTION
[0041] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present utility model.
[0042] It should be noted that if the embodiments of the present utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.
[0043] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0044] Please refer to Figures 1-5 The present utility model provides a fan with inverted waterproof and sand protection structure, including outer frame body 1, fan shell 2 and fan blade 3, the fan shell 2 includes shell base 21, the fan shell 2 is installed on the outer frame body 1 through the shell base 21, the fan blade 3 is installed on the fan shell 2;
[0045] Frame body 1 is provided with frame body inner groove 11 and frame body outer convex 12, the fan blade 3 is provided with fan blade outer groove 31 and fan blade inner convex 32, the frame body inner groove 11 is adapted to the fan blade inner convex 32, the fan blade outer groove 31 is adapted to the frame body outer convex 12, the height of frame body inner groove 11 is lower than the shell base 21;
[0046] It should be noted that although the frame body inner groove 11 and the fan blade inner convex 32, and the fan blade outer groove 31 and the frame body outer convex 12 are adapted, they do not contact each other.
[0047] When the fan is working normally, due to the matching and small gap between the groove and the protrusion, even if the fan is disturbed by external unstable airflow impact, equipment operation vibration transmission or occasional human error, the fan blade 3 can still rotate stably along the predetermined "track" without touching the wall surface of the groove and the protrusion, effectively inhibiting the swing amplitude of the fan blade 3, greatly ensuring the concentricity of the fan rotating shaft, making the air supply uniform and stable, providing continuous and reliable cooling air flow for the equipment, and ensuring that the equipment operating temperature is always in the normal range, and the fan mechanical stability problem will not cause overheating failure.
[0048] It is necessary to additionally explain that the height of the inner groove 11 of the frame is lower than the shell base 21, which can block the small particles such as dust in the external environment from entering the fan interior under the action of the airflow suction generated by the fan operation in the daily work of the fan. The small particles are blocked by the height difference between the groove and the base, and then stay around the shell base 21, and cannot directly cross into the core area, effectively preventing the accumulation of small particles at the internal precise components of the fan, reducing the risk of component wear caused by friction of small particles, prolonging the service life of the components, and avoiding the problem of poor heat dissipation caused by the attachment of small particles, ensuring that the fan can still operate efficiently and stably in the small particle environment. Rain or water vapor can enter the outer frame 1 through the gap between the inner groove 11 of the frame and the inner protrusion 32 of the fan blade, and the outer groove 31 of the fan blade and the outer protrusion 12 of the frame, but cannot contact the shell base 21, and cannot further contact the internal precise components of the fan, reducing the risk of motor short circuit caused by the infiltration of rain or water vapor into the fan interior.
[0049] In this embodiment, by setting the inner groove 11 of the frame and the inner protrusion 32 of the fan blade, and the outer groove 31 of the fan blade and the outer protrusion 12 of the frame, and by setting the height of the inner groove 11 of the frame lower than the shell base 21, on the one hand, the anti-interference ability of the fan to external unstable airflow impact, equipment operation vibration transmission or occasional human error can be improved, and on the other hand, the anti-interference ability of the fan to external small particles including dust and liquid and gaseous water including rain can be improved, thereby improving the ability of the fan to resist external interference factors such as rain and dust, and enhancing the overall stability of the fan.
[0050] In one embodiment, the fan shell 2 includes a rotating shell 22, a core pipe 23 and a driving assembly 24, the core pipe 23 includes a rotating pipe body 231 and a fixed pipe body 232, the rotating shell 22 is installed on the rotating pipe body 231, and the fan blade 3 is installed on the rotating shell 22.
[0051] In one of the embodiments, the fixed tube body 232 is internally provided with a bearing 2321, the rotating shaft 2322 is installed in the bearing 2321, and the end of the rotating shaft 2322 is fixedly connected in the rotating tube body 231.
[0052] In one of the embodiments, one end of the spring (not shown) is installed on the bearing 2321, and the other end of the spring (not shown) is connected on the rotating tube body 231.
[0053] It should be noted that when the fan receives external impact, the rotating tube body 231 and the fixed tube body 232 can cooperate with the spring (not shown) to buffer and disperse external force, prevent stress concentration on the driving assembly 24, reduce the risk of damage to core components, enhance the impact resistance, and ensure stable operation in complex environments.
[0054] It should be additionally noted that the bearing 2321 in the fixed tube body 232 installs the rotating shaft 2322 and connects the rotating tube body 231, which can reduce frictional resistance, make the fan blade 3 rotate smoothly, thereby reducing energy loss, improving heat dissipation efficiency, reducing self-heating, prolonging the service life of components such as the bearing 2321 and the coil, and improving the reliability and durability of the fan as a whole.
[0055] Taking the case that the fan receives external impact force from the front direction of the fan blade 3 as an example:
[0056] When the fan receives external impact force from the front direction of the fan blade 3, due to the close fitting of the clamping groove 221 and the clamping protrusion 33, the fan blade 3 can quickly disperse the impact force to the rotating shell 22, which is a key component connecting the fan blade 3 and the core tube 23, and further transmits the force to the rotating tube body 231 and the fixed tube body 232 in the core tube 23. At this time, the bearing 2321 and the spring (not shown) inside the rotating tube body 231 and the fixed tube body 232 are quickly compressed under the action of the impact force, store part of the energy in the form of elastic potential energy, and slowly rebound after the impact force weakens, continuously offset subsequent vibration waves, further stabilize the fan structure, and ensure that the fan can still maintain a relatively stable rotating state after being subjected to frontal impact, thereby stabilizing the air supply of the fan.
[0057] In this embodiment, through the cooperation between the rotating shell 22, the rotating tube body 231, the fixed tube body 232, the bearing 2321, the rotating shaft 2322, and the spring (not shown), the anti-interference ability of the fan to external impact can be further enhanced, the risk of damage to the core components of the fan can be reduced, and the reliability and durability of the fan as a whole can be improved.
[0058] In one of the embodiments, the end of the fixed tube body 232 away from the rotating tube body 231 is provided with a dismounting cover 2324.
[0059] It should be noted that the material of the detachable cover 2324 can be silica gel, and the detachable cover 2324 can be replaced by a silica gel plug. In this scheme, the detachable cover 2324 and the silica gel plug can prevent rain, water vapor or dust in the external environment from penetrating into the inside of the core pipe 23.
[0060] In this embodiment, by providing the detachable cover 2324, rain, water vapor or dust in the external environment can be prevented from penetrating into the inside of the core pipe 23, thereby enhancing the ability of the fan as a whole to resist external interference factors such as rain and dust.
[0061] In one of the embodiments, the driving assembly 24 is installed outside the core pipe 23, the driving assembly 24 includes a core 241 and a coil, an insulating frame is installed on the core 241, the coil is provided on the insulating frame, and the coil is tightly wound on the core 241 through the insulating frame.
[0062] In one of the embodiments, a magnetic sleeve 242 is installed outside the core 241, and the magnetic sleeve 242 is attached to the inner wall of the rotating shell 22.
[0063] In one of the embodiments, the driving assembly 24 further includes a PCB board 243 installed in the shell base 21, and the PCB board 243 is provided with a contact seat.
[0064] It should be noted that in the daily use process, the fan is also externally connected with an external energy supply device. The magnetic sleeve 242 itself continuously generates a permanent magnetic field. When the external energy supply device is working, there is a current passing through the coil, and a magnetic field is generated around the coil. The magnetic field of the magnetic sleeve 242 interacts with the magnetic field of the coil. The external energy supply device continuously provides a direct current to the coil, thereby generating a coil magnetic field to drive the fan blade 3 to rotate continuously.
[0065] It should be additionally noted that the PCB board 243 and the contact seat are both provided with a wiring terminal, and the PCB board 243 and the contact seat are both connected with the external energy supply device through the wiring terminal.
[0066] In this embodiment, by setting the cooperation among the core 241, the coil and the magnetic sleeve 242, the external energy supply device can be matched, and the direct current provided by the external energy supply device can drive the fan blade 3 to rotate at a high speed.
[0067] In one of the embodiments, the rotating shell 22 is also provided with a water outlet hole 222, and the water outlet hole 222 penetrates through the fan blade 3 to communicate with the outside.
[0068] It should be noted that when there is unexpected rain or water vapor in the rotating shell 22, the water vapor will accumulate at the rotating shell 22 and gradually change into liquid, and the rain will directly accumulate at the rotating shell 22. When the fan 3 is in the working state, the liquid water converted from the water vapor and the rain will be discharged from the water outlet hole 222 under the rotation of the rotating shell 22 and the fan blade 3;
[0069] Specifically, the water outlet hole 222 can be inclined to naturally discharge the liquid in the rotating shell 22 from the water outlet hole 222 under the action of gravity. The specific aperture can be freely set according to actual needs, and can be 0.5 mm.
[0070] In this embodiment, by setting the water outlet hole 222, the liquid in the fan can be discharged from the water outlet hole to avoid the risk of motor short circuit.
[0071] In one embodiment, the rotating shell 22 is provided with a clamping groove 221, and the fan blade 3 is provided with a clamping protrusion 33. The fan blade 3 is installed on the rotating shell 22 through the clamping groove 221.
[0072] In this embodiment, on the one hand, the connection between the fan blade 3 and the rotating shell 22 is enhanced, effectively preventing the fan blade 3 from loosening or falling off due to centrifugal force, air flow impact or external vibration interference, ensuring the safety of the fan operation, avoiding equipment failure caused by the fan blade 3 falling off, on the other hand, the dynamic balance of the fan blade 3 during rotation is accurately maintained, reducing vibration and noise caused by damage to the dynamic balance, further improving the stability and comfort of the fan operation, prolonging the service life of the fan, and ensuring the continuous and stable heat dissipation of the equipment.
[0073] In one embodiment, the outer frame 1 is provided with a disassembly gap 13, and the shell base 21 is provided with a disassembly protrusion 25. The disassembly protrusion 25 is located in the disassembly gap 13, and the shell base 21 is installed in the outer frame 1 through the disassembly protrusion 25.
[0074] It should be noted that when the fan needs to be maintained, repaired or replaced, the maintenance personnel can directly manually grab the disassembly protrusion 25 and move the disassembly protrusion 25 away from the disassembly gap 13, so as to directly disassemble the fan. The operation is simple and easy to operate, without the need for complex tools, and the separation of the fan can be quickly completed. The installation is to grab the disassembly protrusion 25 and move it towards the disassembly gap 13 and install it;
[0075] In the embodiment, by setting the dismounting gap 13 and the dismounting protrusion 25, the staff can directly take out the fan shell 2 part in the fan, and daily maintenance, repair or replacement of the components in the fan shell 2 can be carried out, thereby improving the work efficiency of the daily maintenance, repair or replacement of the fan.
[0076] The above merely describes the preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields under the inventive concept of the present application is included in the patent protection scope of the present application.
Claims
1. A fan with inverted waterproof and dustproof structure, characterized in that, The device includes an outer frame, a fan housing, and fan blades. The fan housing includes a housing base, and the fan housing is mounted on the outer frame via the housing base. The fan blades are mounted on the fan housing. The outer frame has an inner groove and an outer protrusion, and the fan blade has an outer groove and an inner protrusion. The inner groove of the frame is adapted to the inner protrusion of the fan blade, and the outer groove of the fan blade is adapted to the outer protrusion of the frame. The height of the inner groove of the frame is lower than that of the housing base.
2. A fan with an inverted waterproof and dustproof structure as described in claim 1, characterized in that, The fan housing includes a rotating housing, a core tube, and a drive assembly. The core tube includes a rotating tube body and a fixed tube body. The rotating housing is mounted on the rotating tube body, and the fan blades are mounted on the rotating housing.
3. A fan with an inverted waterproof and dust-proof structure as described in claim 2, characterized in that, The fixed tube body is equipped with a bearing, and a rotating shaft is installed in the bearing. The end of the rotating shaft is fixedly connected to the rotating tube body.
4. A fan with an inverted waterproof and dust-proof structure as described in claim 3, characterized in that, One end of the spring is mounted on the bearing, and the other end of the spring is connected to the rotating tube.
5. A fan with an inverted waterproof and dust-proof structure as described in claim 2, characterized in that, The fixed tube body is provided with a disassembly cap at the end away from the rotating tube body.
6. A fan with an inverted waterproof and dust-proof structure as described in claim 2, characterized in that, The drive assembly is installed outside the core tube. The drive assembly includes an iron core and a coil. An insulating frame is installed on the iron core, and a coil is disposed on the insulating frame. The coil is tightly wound around the iron core through the insulating frame.
7. A fan with an inverted waterproof and dust-proof structure as described in claim 6, characterized in that, A magnetic sleeve is installed on the outside of the iron core, and the magnetic sleeve fits against the inner wall of the rotating housing; the drive assembly also includes a PCB board installed in the housing base, and the PCB board is provided with a contact seat.
8. A fan with an inverted waterproof and dust-proof structure as described in claim 7, characterized in that, The rotating housing is also provided with a water outlet hole, which passes through the fan blade and connects to the outside.
9. A fan with an inverted waterproof and dust-proof structure as described in claim 2, characterized in that, The rotating housing has a locking groove, and the fan blade has a locking protrusion. The fan blade is mounted on the rotating housing through the locking groove.
10. A fan with an inverted waterproof and dust-proof structure as described in claim 1, characterized in that, The outer frame has a disassembly notch, and the housing base has a disassembly protrusion located in the disassembly notch. The housing base is installed in the outer frame through the disassembly protrusion.