CN112503014A

CN112503014A - Mute pressurizing air-out structure of fan

Info

Publication number: CN112503014A
Application number: CN202011482368.8A
Authority: CN
Inventors: 黄大勇
Original assignee: Hubei Yijie Electronics Co ltd
Current assignee: Hubei Yijie Electronics Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-03-16

Abstract

The invention discloses a silent supercharging air outlet structure of a fan, which relates to the technical field of a cooling fan and comprises a protective shell, fan blades, a motor, a base and a buffer box, wherein the motor is arranged on the bottom wall of the protective shell through the base, the fan blades are fixedly arranged on a rotating shaft through an installation shaft, the rotating shaft is fixedly arranged on an output shaft of the motor through a coupling, meanwhile, four mutually symmetrical connecting rods are fixedly arranged on the peripheral side wall of the base, the other ends of the connecting rods are fixedly arranged in the buffer box, when the motor horizontally shakes, the base generates impact force towards the periphery to extrude a limiting ring to deform, the limiting ring extrudes the buffer spring at the moment, the buffer spring preliminarily absorbs the impact force, when the impact force is larger, the end part of the installation groove is contacted with the end part of the connecting rod, the base extrudes the buffer box through the connecting rod, and the buffer, thereby the effectual level that has reduced the motor is rocked to reduce the holistic noise of fan.

Description

Mute pressurizing air-out structure of fan

Technical Field

The invention relates to the technical field of cooling fans, in particular to a mute pressurizing air outlet structure of a fan.

Background

The blades of the axial flow fan push air to flow in the same direction as the shaft, the impeller and the propeller of the axial flow fan are somewhat similar, when the axial flow fan works, the flow direction of most of air flow is parallel to the shaft, and the power consumption can be increased along with the rising of the counter pressure of the air flow when the axial flow fan operates.

However, the common fan often generates a large noise when rotating, which affects the use experience, because the fan blades periodically cut air to generate various vortexes, and the vortexes generate aerodynamic noise, especially the maximal vortex energy at the blade tips and the maximal noise. In addition, mechanical noise generated by parts such as motor rotation and blade vibration is also one of the sources of fan noise, and therefore, a silent supercharging air outlet structure of the fan is designed to reduce the noise of the fan.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a mute pressurizing air outlet structure of a fan, which effectively reduces the horizontal shaking of a motor and the overall noise of the fan.

In order to achieve the purpose, the invention provides the following technical scheme: comprises a protective shell, fan blades, a motor, a base and a buffer box, wherein the protective shell is arranged into a hollow box structure, four fan blades are arranged inside the protective shell, the fan blades are fixedly arranged on the outer wall of the mounting shaft, meanwhile, mounting holes are arranged inside the mounting shaft, and the side wall of the mounting hole is provided with a clamping groove, the mounting shaft is clamped on a clamping key outside the rotating shaft through the clamping groove, meanwhile, the rotating shaft is connected on the output shaft of the motor through a coupler, the motor is fixedly arranged on the top wall of the base, the base is arranged on the bottom wall of the protective shell, the upper end and the lower end of the mounting shaft are respectively provided with an upper shaft sleeve and a lower shaft sleeve, the upper shaft sleeve and the lower shaft sleeve are fixedly arranged on the outer wall of the rotating shaft, four connecting rods which are symmetrical to each other are fixedly arranged on the peripheral side wall of the base, the other ends of the connecting rods are fixedly arranged in the buffer box, and the buffer box is fixedly arranged on the peripheral side wall of the protective shell.

As a further scheme of the invention: the mounting groove of four mutual symmetries is seted up to the symmetry in the lateral wall all around of base, connecting rod slidable mounting is in the mounting groove, and leave the gap between the top of connecting rod and the mounting groove, make the connecting rod can carry out the horizontal slip in the mounting groove, the outside fixed mounting of mounting groove has the sleeve simultaneously, sleeve slidable sleeve is on the outer wall of connecting rod, the sleeve can slide along the connecting rod, and the tip fixed mounting of connecting rod has the spacing ring, the connecting rod passes from the inside of spacing ring, wherein the spacing ring adopts flexible material to make, the spacing ring can take place deformation, the outside cover of connecting rod is equipped with buffer spring simultaneously, install respectively on the lateral wall of spacing ring and baffle-box at buffer spring's.

As a further scheme of the invention: the end part of the connecting rod extends into the buffer box, the end part of the connecting rod is fixedly provided with a top plate, the top plate is positioned inside the buffer box, the bottom of the top plate is fixedly provided with a pair of triangular plates, the bevel edges of the triangular plates are arranged close to each other, the bevel edges of the bottom of the triangular plates are provided with clamping grooves, rollers are slidably arranged in the clamping grooves, the rollers are rotatably arranged on the top wall of a vertical rod, the bottom of the vertical rod is fixedly arranged on the top wall of a first sliding block, the first sliding block is slidably arranged in a first sliding rail, the first sliding rail is fixedly arranged on the bottom wall of the buffer box, the bottom wall of the top plate is provided with a pair of vertical rods, the pair of vertical rods are symmetrical relative to the connecting rod, the top of the vertical rod is rotatably arranged on the bottom wall of the top plate through a first rotating, two fixed mounting of slide rail are on the diapire of baffle-box, and it has the slide bar to slide to pass in slider two and the slider one simultaneously, and the both ends of slide bar are installed respectively in the lateral wall of baffle-box and fixed block, and fixed block fixed mounting is on the roof of slide rail one to the cover is equipped with taut spring on the outer wall of slide bar, and the both ends of taut spring are fixed mounting respectively on the lateral wall of slider one and slider two.

As a further scheme of the invention: the telescopic link is fixedly installed on the bottom wall of the top plate, the bottom of the telescopic link is fixedly installed on the bottom wall of the protection box, the damping spring is wound outside the telescopic link, and two ends of the damping spring are connected with the side walls of the top plate and the protection box respectively.

As a further scheme of the invention: the fan blade is characterized in that a side wing is fixedly installed on the outer wall of the fan blade, a welding groove is formed in the middle of the side wing, the side wing is symmetrically installed on the outer wall of the fan blade through the welding groove, meanwhile, a first air guide groove is formed in the surface of the fan blade, a second air guide groove is formed in one side wall, close to the fan blade, of the side wing, and the second air guide groove is connected with the first air guide groove.

As a further scheme of the invention: the inclined bottom of the fan blade is fixedly provided with a pressurizing plate, and pressurizing grooves are arranged at intervals of the pressurizing plate.

As a further scheme of the invention: the lateral wall of the fan blade is fixedly provided with ribs, and the other ends of the ribs are fixedly arranged on the outer wall of the mounting shaft.

As a further scheme of the invention: the left side and the right side of the first sliding rail are fixedly provided with a first limiting block, and a second limiting block is fixedly arranged on a side wall of the first sliding rail far away from the buffer box.

As a further scheme of the invention: the vertical rod is arranged to be inclined, and the inclination angle of the vertical rod is 15 degrees.

As a still further scheme of the invention: and the top wall of the lower shaft sleeve is fixedly provided with a damping copper sheet, and the damping copper sheet is positioned at the output end of the motor.

Compared with the prior art, the invention has the beneficial effects that: the fan is internally provided with four buffer boxes, a limiting ring is arranged in front of the buffer boxes, when a motor horizontally shakes, a base generates impact force to the periphery to drive a limiting sleeve to move, so that the limiting ring is extruded to deform, at the moment, the limiting ring extrudes a buffer spring, the buffer spring preliminarily absorbs the impact force, when the impact force is larger, the end part of a mounting groove is contacted with the end part of a connecting rod, the base extrudes the buffer boxes through the connecting rod, the buffer boxes secondarily absorb the impact force, so that the horizontal shaking of the motor is effectively reduced, the integral noise of the fan is reduced, meanwhile, tensioning springs are arranged inside the buffer boxes, two ends of the tensioning springs are respectively and fixedly arranged on the side walls of a first sliding block and a second sliding block, the tensioning springs tension the first sliding block and the second sliding block, the generated elastic force offsets the impact force, and the impact force in the vertical direction is transferred to the horizontal direction, the offset effect is better to the stability of base has been increased.

Meanwhile, the outer wall of the fan blade is provided with a side wing, the fan blade and the side wing are respectively provided with a first air guide groove and a second air guide groove, the second air guide groove and the second air guide groove are connected together, in the working process of the fan, air is guided into two ends of the side wing along the first air guide groove and the second air guide groove, the generation of tip vortex is scattered, the dissipation of the tip vortex is accelerated, and therefore airflow noise is effectively reduced.

Drawings

FIG. 1 is a side cross-sectional view of the present invention.

Fig. 2 is a top view of the base mount of the present invention.

Fig. 3 is a partial enlarged view of the present invention at a.

FIG. 4 is a schematic view of the internal structure of the buffer box of the present invention.

FIG. 5 is a top view of the fan blade of the present invention.

FIG. 6 is a schematic view of a fan blade structure according to the present invention.

FIG. 7 is a schematic view of the structure of the wing of the present invention.

As shown in the figure: 1. the protective casing, 2, fan blades, 3, a rotating shaft, 4, a motor, 5, a base, 6, a clamping key, 7, a mounting shaft, 8, a lower shaft sleeve, 9, an upper shaft sleeve, 10, a damping copper sheet, 11, a connecting rod, 12, a buffer box, 13, a sleeve, 14, a limiting ring, 15, a first buffer spring, 16, a side wing, 17, a mounting groove, 18, a top plate, 19, a triangular plate, 20, a clamping groove, 21, a roller, 22, a vertical rod, 23, a first slider, 24, a first sliding rail, 25, a sliding rod, 26, a supporting rod, 27, a first rotating seat, 28, a second rotating seat, 29, a second slider, 30, a second sliding rail, 31, a tensioning spring, 32, a fixing block, 33, a first limiting block, 34, a second limiting block, 35, a telescopic rod, 36, a damping spring, 37, a rib, 38, a pressurizing plate, 39, a pressurizing groove, 40, a first air guide groove, 41, a welding groove, 42.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 7, in the embodiment of the present invention, a silent supercharging air outlet structure of a fan includes a protective housing 1, fan blades 2, a motor 4, a base 5 and a buffer box 12, wherein the protective housing 1 is configured as a hollow box structure, four fan blades 2 are disposed inside the protective housing 1, the fan blades 2 are fixedly mounted on an outer wall of a mounting shaft 7, a mounting hole is formed inside the mounting shaft 7, a clamping groove 43 is formed on a side wall of the mounting hole, the mounting shaft 7 is clamped on a clamping key 6 outside a rotating shaft 3 through the clamping groove 43, the rotating shaft 3 drives the fan blades 2 to rotate through the clamping key 6, the rotating shaft 3 is connected to an output shaft of the motor 4 through a coupling, the motor 4 is fixedly mounted on a top wall of the base 5, the base 5 is mounted on a bottom wall of the protective housing 1, and an upper shaft sleeve 9 and a lower shaft sleeve 8 are disposed, wherein upper shaft sleeve 9 and lower shaft sleeve 8 fixed mounting are on the outer wall of pivot 3, through upper shaft sleeve 9 and the axial slip of lower shaft sleeve 8 restriction installation axle 7, fixed mounting has shock attenuation copper sheet 10 on the roof of lower shaft sleeve 8 simultaneously, shock attenuation copper sheet 10 is located motor 4's output, the vibrations that have reduced motor 4 through shock attenuation copper sheet 10 and produced are to flabellum 2's influence, thereby increase the stationarity of flabellum 2 work, the effectual noise that produces in the 2 course of working of reduction flabellum, simultaneously fixed mounting has four connecting rods 11 of mutual symmetry on the lateral wall all around of base 5, the other end fixed mounting of connecting rod 11 is in the inside of baffle-box 12, baffle-box 12 fixed mounting is on the lateral wall all around of protecting sheathing 1, rock through baffle-box 12 to motor 4's level.

Four symmetrical mounting grooves 17 are symmetrically formed in the peripheral side wall of the base 5, the connecting rod 11 is slidably mounted in the mounting grooves 17, a gap is reserved between the top of the connecting rod 11 and the mounting grooves 17, the connecting rod 11 can horizontally slide in the mounting grooves 17, meanwhile, a sleeve 13 is fixedly mounted outside the mounting grooves 17, the sleeve 13 is slidably sleeved on the outer wall of the connecting rod 11, the sleeve 13 can slide along the connecting rod 11, a limit ring 14 is fixedly mounted at the end of the connecting rod 11, the connecting rod 11 penetrates through the limit ring 14, the limit ring 14 is made of flexible materials, the limit ring 14 can deform, a buffer spring 15 is sleeved outside the connecting rod 11, and two ends of the buffer spring 15 are respectively mounted on the limit ring 14 and the side wall of the buffer box 12; when motor 4 takes place the level and rocks, base 5 is to producing the impact force all around, it removes to drive limit sleeve 13, thereby extrude spacing ring 14 and take place deformation, spacing ring 14 extrusion buffer spring 15 this moment, buffer spring 15 carries out preliminary absorption to the impact force, when the impact force is great, the tip of mounting groove 17 and the tip contact of connecting rod 11 are in the same place, base 5 passes through connecting rod 11 extrusion baffle-box 12, baffle-box 12 carries out the secondary absorption to the impact force, thereby effectual level that has reduced motor 4 rocks, thereby the holistic noise of fan has been reduceed.

Wherein, the end of the connecting rod 11 extends into the buffer box 12, the end of the connecting rod 11 is fixedly provided with a top plate 18, the top plate 18 is positioned inside the buffer box 12, meanwhile, the bottom of the top plate 18 is fixedly provided with a pair of triangular plates 19, the inclined edges of the pair of triangular plates 19 are arranged close to each other, the inclined edges of the bottom of the triangular plates 19 are provided with clamping grooves 20, rollers 21 are arranged in the clamping grooves 20 in a sliding manner, the rollers 21 are rotatably arranged on the top wall of vertical rods 22, the bottom of the vertical rods 22 is fixedly arranged on the top wall of a first sliding block 23, the first sliding block 23 is slidably arranged in a first sliding rail 24, the first sliding rail 24 is fixedly arranged on the bottom wall of the buffer box 12, the bottom wall of the top plate 18 is provided with a pair of vertical rods 22, the vertical rods 22 are arranged in an inclined manner, the inclination angle of the vertical rods 22 is 15 degrees, the pair of vertical, the bottom of the vertical rod 22 is rotatably mounted on the top wall of a second sliding block 29 through a rotating seat 28, wherein the second sliding block 29 is slidably mounted in a second sliding rail 30, the second sliding rail 30 is fixedly mounted on the bottom wall of the buffer box 12, a sliding rod 25 slidably penetrates through the second sliding block 29 and the first sliding block 23, two ends of the sliding rod 25 are respectively mounted in the side walls of the buffer box 12 and a fixed block 32, the fixed block 32 is fixedly mounted on the top wall of a first sliding rail 24, a tensioning spring 31 is sleeved on the outer wall of the sliding rod 25, two ends of the tensioning spring 31 are respectively fixedly mounted on the side walls of the first sliding block 23 and the second sliding block 29, the first sliding block 23 and the second sliding block 29 are tensioned through the tensioning spring 31, first limiting blocks 33 are fixedly mounted on the left side and the right side of the first sliding rail 23, the first sliding block 23 is protected through the first limiting blocks 33, the sliding block is prevented from being separated from the surface of the sliding rail; when connecting rod 11 extrudees to the inboard, drive roof 18 and carry out downstream, two set-square 19 drive two sliders 23 through gyro wheel 21 and carry out the motion in opposite directions, roof 18 extrudees montant 22 simultaneously and takes place the slope, drive two sliders 29 and carry out the motion dorsad, tensioning spring 31 is taut this moment, produces elastic force and offsets impact force, shifts the impact force of vertical direction to the horizontal direction, offsets the effect better to the stability of base 5 has been increased.

Wherein, fixed mounting has telescopic link 35 on the diapire of roof 18, and the bottom fixed mounting of telescopic link 35 is on the diapire of guard box 12, and the outside winding of telescopic link 35 has damping spring 36 simultaneously, and damping spring 36's both ends link together with roof 18 and guard box 12's lateral wall respectively, carry out the secondary through damping spring 36 to roof 18 and cushion, and is better to roof 18's buffering effect.

The outer wall of the fan blade 2 is fixedly provided with a side wing 16, the middle position of the side wing 16 is provided with a welding groove 41, the side wing 16 is symmetrically arranged on the outer wall of the fan blade 2 through the welding groove 41, meanwhile, the surface of the fan blade 2 is provided with a first air guide groove 40, a second air guide groove 42 is formed in one side wall, close to the fan blade 2, of the side wing 16, the second air guide groove 42 is connected with the first air guide groove 40, in the working process of the fan, air is guided into the two ends of the side wing 16 along the first air guide groove 40 and the second air guide groove 42, the generation of tip vortexes is scattered, the dissipation of the tip vortexes is accelerated.

Wherein, the slope bottom fixed mounting of flabellum 2 has pressure boost board 28, and the interval is equipped with pressure boost groove 39 between the pressure boost board 28, and at the fan rotation in-process, pressure boost groove 39 and flabellum 2's top forms the height drop, has realized the purpose of increase wind pressure, has increased the air output.

Wherein, fixed mounting has rib 37 on the lateral wall of flabellum 2, and the other end fixed mounting of rib 37 has changed flabellum 2's mass distribution on the outer wall of installation axle 7 through rib 37, and under the effect of centrifugal force, along with the rotation of fan, the phenomenon of stress tempering can appear in flabellum 2 for flabellum 2 rigidity improves, has reduced the cracked risk of flabellum 2, has improved the life of fan.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a silence pressure boost air-out structure of fan, includes protecting sheathing (1), flabellum (2), motor (4), base (5) and cushion box (12), its characterized in that: the protective casing (1) is arranged into a hollow box structure, four fan blades (2) are arranged inside the protective casing (1), the fan blades (2) are fixedly arranged on the outer wall of the mounting shaft (7), meanwhile, a mounting hole is formed inside the mounting shaft (7), a clamping groove (43) is formed in the side wall of the mounting hole, the mounting shaft (7) is clamped on a clamping key (6) outside the rotating shaft (3) through the clamping groove (43), meanwhile, the rotating shaft (3) is connected on the output shaft of the motor (4) through a coupling, the motor (4) is fixedly arranged on the top wall of the base (5), the base (5) is arranged on the bottom wall of the protective casing (1), an upper shaft sleeve (9) and a lower shaft sleeve (8) are respectively arranged at the upper end and the lower end of the mounting shaft (7), and the upper shaft sleeve (9) and the lower shaft sleeve (8) are fixedly arranged on the outer wall of, meanwhile, four symmetrical connecting rods (11) are fixedly mounted on the peripheral side wall of the base (5), the other ends of the connecting rods (11) are fixedly mounted inside the buffer box (12), and the buffer box (12) is fixedly mounted on the peripheral side wall of the protective shell (1).

2. The structure of claim 1, wherein the air outlet structure is a fan with a silencing booster, and the structure comprises: four symmetrical mounting grooves (17) are symmetrically arranged in the peripheral side wall of the base (5), the connecting rod (11) is slidably mounted in the mounting grooves (17), and a gap is left between the top of the connecting rod (11) and the mounting groove (17) so that the connecting rod (11) can horizontally slide in the mounting groove (17), meanwhile, the sleeve (13) is fixedly arranged outside the mounting groove (17), the sleeve (13) is sleeved on the outer wall of the connecting rod (11) in a sliding manner, the sleeve (13) can slide along the connecting rod (11), and the end part of the connecting rod (11) is fixedly provided with a limit ring (14), the connecting rod (11) passes through the limit ring (14), wherein the limit ring (14) is made of flexible material, the limit ring (14) can deform, meanwhile, a buffer spring (15) is sleeved outside the connecting rod (11), and two ends of the buffer spring (15) are respectively installed on the side walls of the limiting ring (14) and the buffer box (12).

3. The structure of claim 2, wherein the air outlet structure is a fan with a silencing booster, and the structure comprises: the end part of the connecting rod (11) extends into the buffer box (12), the end part of the connecting rod (11) is fixedly provided with a top plate (18), the top plate (18) is positioned inside the buffer box (12), meanwhile, the bottom of the top plate (18) is fixedly provided with a pair of triangular plates (19), the inclined edges of the pair of triangular plates (19) are arranged close to each other, the inclined edges of the bottom of the triangular plates (19) are provided with clamping grooves (20), rollers (21) are arranged in the clamping grooves (20) in a sliding manner, the rollers (21) are rotatably arranged on the top wall of the vertical rod (22), meanwhile, the bottom of the vertical rod (22) is fixedly arranged on the top wall of a first sliding block (23), the first sliding block (23) is slidably arranged in a first sliding rail (24), the first sliding rail (24) is fixedly arranged on the bottom wall of the buffer box (12), the bottom wall of the top plate (18) is provided with a pair of vertical rods, meanwhile, the top of the vertical rod (22) is rotatably installed on the bottom wall of the top plate (18) through a rotating seat I (27), the bottom of the vertical rod (22) is rotatably installed on the top wall of a sliding block II (29) through a rotating seat (28), the sliding block II (29) is slidably installed in a sliding rail II (30), the sliding rail II (30) is fixedly installed on the bottom wall of the buffer box (12), a sliding rod (25) penetrates through the sliding block II (29) and the sliding block I (23) in a sliding mode, two ends of the sliding rod (25) are installed in the side walls of the buffer box (12) and the fixed block (32) respectively, the fixed block (32) is fixedly installed on the top wall of the sliding rail I (24), a tensioning spring (31) is sleeved on the outer wall of the sliding rod (25), and two ends of the tensioning spring (31) are fixedly installed on the side walls of the sliding block I (23).

4. The structure of claim 3, wherein the air outlet structure is a fan with a silencing booster, and the structure comprises: the telescopic rod (35) is fixedly mounted on the bottom wall of the top plate (18), the bottom of the telescopic rod (35) is fixedly mounted on the bottom wall of the protection box (12), meanwhile, a damping spring (36) is wound on the outer portion of the telescopic rod (35), and two ends of the damping spring (36) are connected with the top plate (18) and the side wall of the protection box (12) respectively.

5. The structure of claim 1, wherein the air outlet structure is a fan with a silencing booster, and the structure comprises: the fan blade is characterized in that a side wing (16) is fixedly mounted on the outer wall of the fan blade (2), a welding groove (41) is formed in the middle of the side wing (16), the side wing (16) is symmetrically mounted on the outer wall of the fan blade (2) through the welding groove (41), a first air guide groove (40) is formed in the surface of the fan blade (2), a second air guide groove (42) is formed in one side wall, close to the fan blade (2), of the side wing (16), and the second air guide groove (42) is connected with the first air guide groove (40).

6. The structure of claim 1, wherein the air outlet structure is a fan with a silencing booster, and the structure comprises: the inclined bottom of the fan blade (2) is fixedly provided with pressure increasing plates (28), and pressure increasing grooves (39) are arranged between the pressure increasing plates (28) at intervals.

7. The structure of claim 1, wherein the air outlet structure is a fan with a silencing booster, and the structure comprises: fixed mounting has rib (37) on the lateral wall of flabellum (2), and the other end fixed mounting of rib (37) is on the outer wall of installation axle (7).

8. The structure of claim 3, wherein the air outlet structure is a fan with a silencing booster, and the structure comprises: the left side and the right side of the first sliding rail (23) are fixedly provided with a first limiting block (33), and meanwhile, a side wall, away from the buffer box (12), of the first sliding rail (23) is fixedly provided with a second limiting block (34).

9. The structure of claim 3, wherein the air outlet structure is a fan with a silencing booster, and the structure comprises: the vertical rod (22) is arranged to be inclined, and the inclination angle of the vertical rod (22) is 15 degrees.

10. The structure of claim 1, wherein the air outlet structure is a fan with a silencing booster, and the structure comprises: and the top wall of the lower shaft sleeve (8) is fixedly provided with a damping copper sheet (10), and the damping copper sheet (10) is positioned at the output end of the motor (4).