Axial flow fan with noise reduction function

Abstract

The invention belongs to the technical field of axial flow fans, and particularly relates to an axial flow fan with a noise reduction function, which comprises an air duct, a fine filtration component is arranged in the air duct, the fine filtration component comprises a plurality of turbulent flow partition plates fixedly mounted at the right part of the inner wall of the air duct, and the multiple turbulent flow partition plates are distributed at equal intervals left and right. The output shaft of the alternating current motor rotates, the multiple fixing sleeves are driven by the transmission shaft to rotate along with the static bars, static electricity generated by the static bars can adsorb fine batting in air passing through the space between the left and right adjacent turbulent flow partition plates in the rotating process of the static bars, and fine filtering of the air is achieved. The left and right adjacent air passing ports are staggered at 90 degrees, so that the flow track of airflow among the plurality of turbulent flow partition plates cannot be a straight line, that is, the flow track of the airflow among the plurality of turbulent flow partition plates is zigzag flow, and the path of the airflow is lengthened, so that the time for the airflow to flow through the turbulent flow partition plates is prolonged, and enough filtering time is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of axial flow fans, and in particular relates to an axial flow fan with a noise reduction function. Background Art

[0002] Axial flow fans are called "axial flow" because the air flows parallel to the fan axis. Axial flow fans are usually used in places where the flow requirements are higher and the pressure requirements are lower.

[0003] After searching, the Chinese patent with publication number CN116201753A discloses an axial flow fan with active noise reduction function. When the spherical end of the piezoelectric plate swings, the piezoelectric plate bends and generates a potential difference. The two end surfaces of the piezoelectric plate that generate the potential difference are electrically connected to the two inclined surfaces of the adsorption plate respectively. When the piezoelectric plate generates a potential difference, the two inclined surfaces of the adsorption plate are respectively charged with positive and negative charges. The potentials on the two adjacent inclined surfaces of the two adjacent adsorption plates are different. When fibers and dust pass through the two adsorption plates, they are adsorbed by the electric field on the adsorption plates, thereby filtering and intercepting the fiber dust and preventing the fiber dust from adhering to the drive motor.

[0004] However, there is an angle gap between two adjacent adsorption plates of the above-mentioned axial flow fan. During the rotation of the adsorption plates, some fluff can easily enter the interior of the axial flow fan through the gap between the adsorption plates, resulting in reduced filtering effect of the axial flow fan. Summary of the invention

[0005] The object of the present invention is to provide an axial flow fan with a noise reduction function to solve the defects pointed out in the above background technology.

[0006] The technical solution of the present invention is: an axial flow fan with noise reduction function, comprising a wind tube;

[0007] A fine filter component is provided inside the air cylinder;

[0008] A cleaning component is provided inside the air duct;

[0009] An AC motor is arranged inside the air duct, and a fan blade is fixedly mounted on the output shaft of the AC motor.

[0010] As a preferred solution of the present invention, the fine filter component includes a spoiler baffle fixedly installed on the right part of the inner wall of the air duct, the number of the spoiler baffles is multiple, and the multiple spoiler baffles are equidistantly distributed on the left and right, and two air outlets are penetrated through the side of the spoiler baffle close to the AC motor, and the two air outlets are symmetrically distributed about the center of the spoiler baffle, and the multiple air outlets opened on the spoiler baffles are parallel and staggered, and the angle is degrees, and a transmission shaft is rotatably installed at the center position of the multiple spoiler baffles, and the outer wall of the transmission shaft is fixedly installed with multiple fixed sleeves distributed on the left and right, and the outer wall of the fixed sleeve is rotatably installed with two electrostatic rods, the two electrostatic rods are symmetrically distributed about the center of the fixed sleeve, and the electrostatic rod is located between two adjacent spoiler baffles on the left and right.

[0011] As a preferred solution of the present invention, a plurality of sliding sleeves distributed on the left and right are slidably installed on the outer wall of the transmission shaft, and two arc-shaped reflection plates are fixedly installed on the outer wall of the sliding sleeve. The two arc-shaped reflection plates are symmetrically distributed about the center of the sliding sleeve, and the position of the arc-shaped reflection plate corresponds to an air outlet position on its right side, and an oscillation spring is fixedly installed between the arc-shaped reflection plate and the right side surface of a spoiler baffle located on its left end.

[0012] As a preferred solution of the present invention, the cleaning component includes a flap plate rotatably mounted on the outer wall of the transmission shaft, and the right side surface of the flap plate is in contact with the left side surface of the rightmost spoiler baffle;

[0013] The cleaning component also includes two servo cylinders fixedly installed on the right end of the outer wall of the wind tube, the two servo cylinders are symmetrically distributed about the center of the wind tube, the ends of the output rods of the servo cylinders are fixedly installed with main beams, and both ends of the side of the main beam close to the servo cylinders are fixedly installed with guide frames, and the left side of the guide frame is fixedly installed with a fan-shaped restraining plate.

[0014] As a preferred solution of the present invention, a first rope-binding column is fixedly installed on the right side surface of one of the fan-shaped restraining plates located at the right end, second rope-binding columns are fixedly installed on both ends of the left side surface of the flap plate, and a flexible rope is fixedly installed between the first rope-binding column and the second rope-binding column, and two rope-winding columns are fixedly installed on the left side of the spoiler baffle located at the rightmost end, and the two rope-winding columns are symmetrically distributed about the center of the spoiler baffle, and the flexible rope is wound around the periphery of the rope-winding columns.

[0015] As a preferred solution of the present invention, a counterweight is fixedly mounted on the left side of the gate plate, the gate plate is inclined, and the counterweight is located at an oblique upper position of the gate plate.

[0016] As a preferred solution of the present invention, two dust covers are fixedly installed on the right end of the outer wall of the air duct, and the two dust covers are located on the periphery of the two servo cylinders. The right end of the outer wall of the air duct is provided with front and rear distributed yield slots, and there are two groups of left and right yield slots, and the positions of the yield slots correspond to the positions of the fan-shaped restraining plates.

[0017] As a preferred solution of the present invention, a motor bracket is installed inside the wind duct, the AC motor is fixedly installed on the middle part of the left side surface of the motor bracket by bolts, fan blades are fixedly installed on the output shaft of the AC motor, and the output shaft end of the AC motor is fixedly connected to the left end of the transmission shaft by a coupling.

[0018] As a preferred solution of the present invention, a filter is fixedly installed on the right end of the air duct.

[0019] As a preferred solution of the present invention, the dust cover is detachably fixed on the outer wall of the air duct by bolts, and the inner wall of the air duct 100 is fixedly installed with sound insulation cotton.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. When the present invention is working, the output shaft of the AC motor rotates, and the multiple fixed sleeves are driven to rotate together with the electrostatic rod through the transmission shaft. The static electricity generated by the electrostatic rod can adsorb fine fluff in the air passing through the two adjacent spoiler baffles on the left and right during its rotation, thereby achieving fine filtration of the air. By staggering the adjacent air outlets on the left and right at 90 degrees, the flow trajectory of the airflow between the multiple spoiler baffles cannot be a straight line, that is, the flow trajectory of the airflow between the multiple spoiler baffles is a zigzag flow, which makes the path of the airflow longer, thereby extending the time of flowing through the spoiler baffles, ensuring sufficient filtering time.

[0022] 2. When the present invention is working, when the air flows through the two air outlets to the spoiler baffle located at the left end thereof, the airflow first contacts the right side of the two arc-shaped reflective plates at the left end of the air outlet. Since the arc-shaped reflective plates are arranged in an arc shape, after the airflow is blown to the right side of the air outlet, it is reflected by the spoiler effect of the air outlet, thereby better contacting the rotating electrostatic rod.

[0023] 3. When the present invention is working, the right side of the arc reflector is subjected to the reaction force of the airflow, causing the arc reflector to move to the left. During the displacement of the arc reflector to the left, the oscillation spring is compressed. When the electrostatic rod rotates to coincide with the position of the air outlet at its right end, the air blown directly to the left by the air outlet cannot be directly blown to the right side of the arc reflector at its left end due to the blocking effect of the electrostatic rod. The airflow force to the left on the arc reflector disappears, and the rebound force of the oscillation spring is released, pushing the arc reflector to return to the left. Therefore, under the continuous rotation of the electrostatic rod and the elastic force of the oscillation spring, the arc reflector swings back and forth left and right, and the air between the left and right spoiler baffles is moved, so that the air between the left and right spoiler baffles is oscillated, ensuring that the air can be in full contact with the electrostatic rod, thereby improving the adsorption effect on fine fluff in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 A top sectional three-dimensional structural schematic diagram of ;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the fine filter component of the present invention;

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the AC motor and fan blades of the present invention;

[0028] Figure 5 For the present invention Figure 3 Schematic diagram of the local three-dimensional structure;

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of the local three-dimensional structure;

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the cleaning component of the present invention;

[0031] Figure 8 For the present invention Figure 2 A schematic diagram of a top view structure;

[0032] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at point A in the middle.

[0033] In the figure: 100, air duct; 101, dust cover; 102, motor bracket; 103, clearance slot; 104, filter; 200, fine filter component; 201, spoiler baffle; 202, air outlet; 203, transmission shaft; 204, fixing sleeve; 205, electrostatic rod; 206, sliding sleeve; 207, arc-shaped reflection plate; 208, oscillation spring; 300, cleaning component; 301, flap; 302, servo cylinder; 303, main beam; 304, derivation frame; 305, fan-shaped restraining plate; 306, first rope beam column; 307, second rope beam column; 308, flexible rope; 309, rope winding column; 3010, counterweight; 400, AC motor; 401, fan blade. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 9 The technical solution provided by the present invention specifically includes the following embodiments:

[0036] Embodiment 1

[0037] An axial flow fan with a noise reduction function includes a wind tube 100, wherein a fine filter component 200 is arranged inside the wind tube 100; the fine filter component 200 includes a spoiler baffle 201 fixedly installed on the right part of the inner wall of the wind tube 100, wherein the spoiler baffles 201 are multiple in number, and the multiple spoiler baffles 201 are equally spaced from left to right, and two air outlets 202 are formed through a side of the spoiler baffle 201 close to an AC motor 400, and the two air outlets 202 are symmetrically distributed about the center of the spoiler baffle 201 The air vents 202 provided on the plurality of spoiler baffles 201 are arranged in parallel and staggered, and the angle is 90°. A transmission shaft 203 is rotatably installed at the center of the plurality of spoiler baffles 201. The outer wall of the transmission shaft 203 is fixedly installed with a plurality of fixed sleeves 204 distributed left and right. Two electrostatic rods 205 are rotatably installed on the outer wall of the fixed sleeve 204. The two electrostatic rods 205 are symmetrically distributed about the center of the fixed sleeve 204, and the electrostatic rod 205 is located between two adjacent spoiler baffles 201 on the left and right.

[0038] The outer wall of the transmission shaft 203 is slidably mounted with a plurality of sliding sleeves 206 distributed left and right, and the outer wall of the sliding sleeve 206 is fixedly mounted with two arc-shaped reflective plates 207, which are symmetrically distributed about the center of the sliding sleeve 206, and the position of the arc-shaped reflective plates 207 corresponds to the position of an air outlet 202 on the right side thereof, and an oscillation spring 208 is fixedly mounted between the arc-shaped reflective plate 207 and the right side surface of the spoiler baffle 201 at the left end thereof;

[0039] A motor bracket 102 is installed inside the air duct 100, and the AC motor 400 is fixedly installed on the middle part of the left side of the motor bracket 102 by bolts. A fan blade 401 is fixedly installed on the output shaft of the AC motor 400. The end of the output shaft of the AC motor 400 is fixedly connected to the left end of the transmission shaft 203 by a coupling. A filter screen 104 is fixedly installed on the right end of the air duct 100.

[0040] Specifically, the fan blade 401 is driven to rotate by the output shaft of the AC motor 400 to drive the air flow. The air at the right end of the air duct 100 is filtered by the filter screen 104 and then passes through the air outlets 202 that are staggered on the left and right. After flowing out from the inside of the plurality of spoiler baffles 201 distributed on the left and right, the air is output from the left end of the air duct 100. At the same time, the output shaft of the AC motor 400 rotates, and the plurality of fixed sleeves 204 and the electrostatic rod 205 are driven to rotate through the transmission shaft 203. The static electricity generated by the electrostatic rod 205 can be used to irradiate the fine particles in the air passing through the two adjacent spoiler baffles 201 on the left and right during its rotation. The fluff is adsorbed to achieve fine filtration of the air. The adjacent air outlets 202 are staggered at 90 degrees on the left and right, so that the flow trajectory of the airflow between the multiple spoiler baffles 201 cannot be a straight line, that is, the flow trajectory of the airflow between the multiple spoiler baffles 201 is a zigzag flow, which makes the path of the airflow longer, thereby extending the time of flowing through the spoiler baffles 201 to ensure sufficient filtration time. When the air flows through the two air outlets 202 to the spoiler baffle 201 at the left end thereof, the airflow first contacts the right side of the two arc-shaped reflective plates 207 at the left end of the air outlet 202, and is Since the arc reflector 207 is arc-shaped, after the airflow blows to the right side of the air outlet 202, it is reflected by the turbulence of the air outlet 202, so as to better contact with the rotating electrostatic rod 205. The right side of the arc reflector 207 is subjected to the reaction force of the airflow, causing the arc reflector 207 to move to the left. During the displacement of the arc reflector 207 to the left, the oscillation spring 208 is compressed. When the electrostatic rod 205 rotates to coincide with the position of the air outlet 202 at its right end, the air blown directly to the left by the air outlet 202 cannot be directly blown to the electrostatic rod 205 located thereon due to the blocking effect of the electrostatic rod 205. On the right side of the left end arc reflector 207, the leftward airflow force on the arc reflector 207 disappears, and the rebound force of the oscillation spring 208 is released, pushing the arc reflector 207 to return to the left. Therefore, under the action of the continuous rotation of the electrostatic rod 205 and the elastic force of the oscillation spring 208, the arc reflector 207 swings back and forth left and right, and the air between the left and right spoiler baffles 201 is moved, so that the air between the left and right spoiler baffles 201 is oscillated, ensuring that the air can be in full contact with the electrostatic rod 205, thereby improving the adsorption effect on fine fluff in the air.

[0041] Embodiment 2

[0042] A cleaning component 300 is provided inside the air duct 100. The cleaning component 300 includes a flap 301 rotatably mounted on the outer wall of the transmission shaft 203. The right side of the flap 301 fits with the left side of the rightmost spoiler baffle 201. The cleaning component 300 also includes two servo cylinders 302 fixedly mounted on the right end of the outer wall of the air duct 100. The two servo cylinders 302 are symmetrically distributed about the center of the air duct 100. The ends of the output rods of the servo cylinders 302 are fixedly mounted with main beams 303. Both ends of a side of the main beam 303 close to the servo cylinder 302 are fixedly mounted with guide frames 304. The left side of the guide frame 304 is fixedly mounted with a fan-shaped restraining plate 305.

[0043] A first rope-binding column 306 is fixedly installed on the right side of a fan-shaped restraining plate 305 at the right end, and second rope-binding columns 307 are fixedly installed at both ends of the left side of the flap plate 301. A flexible rope 308 is fixedly installed between the first rope-binding column 306 and the second rope-binding column 307. Two rope-winding columns 309 are fixedly installed on the left side of the spoiler baffle 201 at the rightmost end. The two rope-winding columns 309 are symmetrically distributed about the center of the spoiler baffle 201, and the flexible rope 308 is wound around the periphery of the rope-winding columns 309.

[0044] Two dust covers 101 are fixedly installed on the right end of the outer wall of the air cylinder 100. The two dust covers 101 are located on the periphery of the two servo cylinders 302. The right end of the outer wall of the air cylinder 100 is provided with front and rear distributed yielding slots 103, and there are two groups of yielding slots 103 on the left and right. The positions of the yielding slots 103 correspond to the positions of the fan-shaped restraining plates 305. A counterweight 3010 is fixedly installed on the left side of the gate plate 301. The gate plate 301 is inclined, and the counterweight 3010 is located at the upper oblique position of the gate plate 301.

[0045] Specifically, the output rods of the two servo cylinders 302 drive the front and rear main beams 303 to move relative to each other, and the two main beams 303 drive the front and rear derivation frames 304 to move together, so that the front and rear fan-shaped binding plates 305 are extended into the interior of the wind tube 100 through the opened yielding slots 103. After the fan-shaped binding plates 305 are fully extended into the interior of the wind tube 100, the left side of the fan-shaped binding plates 305 just contacts the right end of the outer wall of the electrostatic rod 205 at the corresponding position, and the output shaft of the AC motor 400 drives the transmission shaft 203 to rotate, and the electrostatic rod 205 is driven to rotate together through the fixed sleeve 204, so that the electrostatic rod 205 rolls along the left side of the fan-shaped binding plate 305, and the fine hair attached to the surface of the electrostatic rod 205 is removed by the gray adhesive tape on the fan-shaped binding plate 305, so that the electrostatic rod 205 is restored to cleanliness, and when the derivation frames 304 move toward each other, they drive the two first rope beams 306 to move together, and the guide rods 306 are driven to move together. The tension of the flexible rope 308 on the second rope binding column 307 gradually disappears, and the gate plate 301 is pressed to rotate along the outer wall of the transmission shaft 203 under the action of the gravity of the counterweight block 3010 until the gate plate 301 covers the rightmost air outlet 202, and the two fan-shaped binding plates 305 are just moved into place. Therefore, during the cleaning process of the static rod 205, the external air will not enter the interior of the wind tube 100. After the static rod 205 is cleaned, the output rods of the two servo cylinders 302 push the two main beams 303 to move backward, thereby driving the fan-shaped binding plates 305 in the front and rear directions to move backward together through the guide frame 304, and then pulling the two flexible ropes 308 through the two first rope binding columns 306. The two flexible ropes 308 pull the two second rope binding columns 307 under the winding action of the two rope winding columns 309, so that the gate plate 301 rotates around the transmission shaft 203, and the covered air outlet 202 is opened again to restore ventilation.

[0046] Embodiment 3

[0047] The dust cover 101 is detachably fixed on the outer wall of the air duct 100 by bolts, and the inner wall of the air duct 100 is fixedly installed with sound insulation cotton;

[0048] Specifically, in this embodiment, when too much fine fluff accumulates on the surface of the dust-sticking tape fixed on the fan-shaped binding plate 305 and affects its dust-sticking effect, the dust cover 101 can be removed by dismantling the bolts, and the dust-sticking tape on the fan-shaped binding plate 305 can be replaced. By installing sound insulation cotton on the inner wall of the air duct 100, the transmission of noise can be suppressed, thereby reducing the noise.

[0049] When the present invention is working, the fan blade 401 is driven to rotate by the output shaft of the AC motor 400 to drive the air flow. The air at the right end of the wind tube 100 is filtered by the filter screen 104 and then passes through the air outlets 202 staggered on the left and right in turn. After flowing out from the inside of the plurality of spoiler baffles 201 distributed on the left and right, it is output from the left end of the wind tube 100. At the same time, the output shaft of the AC motor 400 rotates, and drives the plurality of fixed sleeves 204 and the electrostatic rod 205 to rotate through the transmission shaft 203. The static electricity generated by the electrostatic rod 205 can adsorb the fine fluff in the air passing through the two adjacent spoiler baffles 201 on the left and right during its rotation, so as to achieve fine filtration of the air. By displacing the adjacent air outlets 202 on the left and right at 90 degrees, the flow trajectory of the airflow between the plurality of spoiler baffles 201 cannot be a straight line, that is, the flow trajectory of the airflow between the plurality of spoiler baffles 201 is a zigzag flow, which makes the path of the airflow longer, thereby extending the time of flowing through the spoiler baffles 201, and ensuring sufficient filtering time.

[0050] When the air flows through the two air outlets 202 toward the spoiler baffle 201 at the left end thereof, the airflow first contacts the right side of the two arc-shaped reflective plates 207 at the left end of the air outlet 202. Since the arc-shaped reflective plates 207 are arc-shaped, after the airflow blows toward the right side of the air outlet 202, it is reflected by the spoiler of the air outlet 202, thereby better contacting the rotating electrostatic rod 205. The right side of the arc-shaped reflective plate 207 is subjected to the reaction force of the airflow, causing the arc-shaped reflective plate 207 to move to the left. During the displacement of the arc-shaped reflective plate 207 to the left, the oscillation spring 208 is compressed. When the electrostatic rod 205 rotates to coincide with the position of the air outlet 202 at its right end, the air outlet 20 The air blowing directly to the left cannot be directly blown to the right side of the arc-shaped reflective plate 207 located at the left end thereof due to the blocking effect of the electrostatic rod 205. The force of the airflow to the left on the arc-shaped reflective plate 207 disappears, and the rebound force of the oscillation spring 208 is released, pushing the arc-shaped reflective plate 207 to return to the left. Therefore, under the continuous rotation of the electrostatic rod 205 and the elastic force of the oscillation spring 208, the arc-shaped reflective plate 207 swings back and forth left and right, and the air between the left and right spoiler baffles 201 is moved, so that the air between the left and right spoiler baffles 201 is oscillated, ensuring that the air can be in full contact with the electrostatic rod 205, thereby improving the adsorption effect of fine fluff in the air;

[0051] After using for a period of time, the control box provided on the surface of the axial flow fan can be used to slow down the speed of the AC motor 400, and the two servo cylinders 302 can be started. The output rods of the two servo cylinders 302 drive the front and rear main beams 303 to move relative to each other, and the two main beams 303 drive the front and rear guide frames 304 to move together, so that the front and rear fan-shaped binding plates 305 are extended into the interior of the wind tube 100 through the openings 103, and the fan-shaped binding plates 305 are completely extended into the wind tube 100. After the fan-shaped restraining plate 305 is inserted into the interior, the left side of the fan-shaped restraining plate 305 just contacts the right end of the outer wall of the corresponding position of the electrostatic rod 205, and the transmission shaft 203 is driven to rotate through the output shaft of the AC motor 400, and the electrostatic rod 205 is driven to rotate together through the fixed sleeve 204, so that the electrostatic rod 205 rolls along the left side of the fan-shaped restraining plate 305, and the fine fluff attached to the surface of the electrostatic rod 205 is removed by the gray adhesive tape on the fan-shaped restraining plate 305, so that the electrostatic rod 205 is restored to cleanliness. When the electric shock rod 205 moves to the right, the two first rope-binding columns 306 are moved together, causing the tension of the flexible rope 308 on the second rope-binding column 307 to gradually disappear. Under the gravity of the counterweight 3010, the gate plate 301 is pressed to rotate along the outer wall of the transmission shaft 203 until the gate plate 301 covers the rightmost air outlet 202. The two fan-shaped binding plates 305 are just moved into place. Therefore, during the process of cleaning the electrostatic rod 205, the external air will not enter the interior of the wind tube 100. After the electrostatic rod 205 is cleaned, The output rods of the two servo cylinders 302 push the two main beams 303 to move backward, thereby driving the fan-shaped restraining plates 305 in the front and rear directions to move backward together through the guide frame 304, and then pulling the two flexible ropes 308 through the two first rope-binding columns 306. The two flexible ropes 308 pull the two second rope-binding columns 307 under the winding action of the two rope-winding columns 309, so that the flap 301 rotates around the transmission shaft 203, opening the blocked air outlet 202 again and restoring ventilation.

[0052] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An axial flow fan with noise reduction function, characterized in that: comprising a hair dryer (100); A fine filter component (200), wherein the air cylinder (100) is provided with a fine filter component (200); A cleaning component (300), wherein the interior of the air cylinder (100) is provided with a cleaning component (300); An AC motor (400) is provided inside the wind tube (100), and a fan blade (401) is fixedly mounted on the output shaft of the AC motor (400).

2. The axial flow fan with noise reduction function according to claim 1, characterized in that: The fine filter component (200) comprises a spoiler baffle (201) fixedly mounted on the right part of the inner wall of the air cylinder (100), the spoiler baffles (201) are multiple in number, and the multiple spoiler baffles (201) are equally spaced from left to right, and two air outlets (202) are provided through a side of the spoiler baffle (201) close to the AC motor (400), the two air outlets (202) are symmetrically distributed about the center of the spoiler baffle (201), and the air outlets (202) provided on the multiple spoiler baffles (201) are symmetrically distributed about the center of the spoiler baffle (201). 2) parallel staggered distribution with an included angle of (90) degrees, a transmission shaft (203) is rotatably mounted at the center of a circle of the plurality of spoiler baffles (201), a plurality of fixed sleeves (204) distributed left and right are fixedly mounted on the outer wall of the transmission shaft (203), two electrostatic rods (205) are rotatably mounted on the outer wall of the fixed sleeve (204), the two electrostatic rods (205) are symmetrically distributed about the center of the fixed sleeve (204), and the electrostatic rod (205) is located between two adjacent spoiler baffles (201) on the left and right.

3. The axial flow fan with noise reduction function according to claim 2, characterized in that: The outer wall of the transmission shaft (203) is slidably mounted with a plurality of sliding sleeves (206) distributed left and right, and the outer wall of the sliding sleeve (206) is fixedly mounted with two arc-shaped reflection plates (207), the two arc-shaped reflection plates (207) are symmetrically distributed about the center of the sliding sleeve (206), and the position of the arc-shaped reflection plates (207) corresponds to the position of an air outlet (202) on the right side thereof, and an oscillation spring (208) is fixedly mounted between the arc-shaped reflection plate (207) and the right side surface of a spoiler baffle (201) located at the left end thereof.

4. The axial flow fan with noise reduction function according to claim 3, characterized in that: The cleaning component (300) comprises a flap plate (301) rotatably mounted on the outer wall of the transmission shaft (203), wherein the right side surface of the flap plate (301) is in contact with the left side surface of the rightmost spoiler baffle (201); The cleaning component (300) further comprises two servo cylinders (302) fixedly mounted on the right end of the outer wall of the air duct (100), the two servo cylinders (302) being symmetrically distributed about the center of the air duct (100), the ends of the output rods of the servo cylinders (302) being fixedly mounted with main beams (303), the two ends of a side surface of the main beam (303) close to the servo cylinders (302) being fixedly mounted with guide frames (304), and the left side surface of the guide frame (304) being fixedly mounted with a fan-shaped restraining plate (305).

5. The axial flow fan with noise reduction function according to claim 4, characterized in that: A first rope-binding column (306) is fixedly installed on the right side of the fan-shaped restraining plate (305) located at the right end, and second rope-binding columns (307) are fixedly installed at both ends of the left side of the flap plate (301). A flexible rope (308) is fixedly installed between the first rope-binding column (306) and the second rope-binding column (307). Two rope-winding columns (309) are fixedly installed on the left side of the spoiler baffle (201) located at the rightmost end. The two rope-winding columns (309) are symmetrically distributed about the center of the spoiler baffle (201), and the flexible rope (308) is wound around the periphery of the rope-winding columns (309).

6. The axial flow fan with noise reduction function according to claim 5, characterized in that: A counterweight block (3010) is fixedly mounted on the left side of the gate flap (301), the gate flap (301) is arranged in an inclined manner, and the counterweight block (3010) is located at an inclined upper position of the gate flap (301).

7. The axial flow fan with noise reduction function according to claim 6, characterized in that: Two dust covers (101) are fixedly installed on the right end of the outer wall of the air duct (100), and the two dust covers (101) are located on the periphery of the two servo cylinders (302). The right end of the outer wall of the air duct (100) is provided with front and rear distributed clearance slots (103), and there are two groups of the clearance slots (103) on the left and right sides. The position of the clearance slots (103) corresponds to the position of the fan-shaped restraining plate (305).

8. The axial flow fan with noise reduction function according to claim 7, characterized in that: A motor bracket (102) is installed inside the wind tube (100), the AC motor (400) is fixedly installed on the middle part of the left side surface of the motor bracket (102) by means of bolts, a fan blade (401) is fixedly installed on the output shaft of the AC motor (400), and the output shaft end of the AC motor (400) is fixedly connected to the left end of the transmission shaft (203) by means of a coupling.

9. An axial flow fan with noise reduction function according to claim (8), characterized in that: A filter screen (104) is fixedly mounted on the right end of the air cylinder (100).

10. The axial flow fan with noise reduction function according to claim 9, characterized in that: The dust cover (101) is detachably fixedly mounted on the outer wall of the air duct (100) by means of bolts, and sound insulation cotton is fixedly mounted on the inner wall of the air duct (100).

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