CN111980970A - Air outlet structure of axial fan - Google Patents

Air outlet structure of axial fan Download PDF

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Publication number
CN111980970A
CN111980970A CN202010897364.XA CN202010897364A CN111980970A CN 111980970 A CN111980970 A CN 111980970A CN 202010897364 A CN202010897364 A CN 202010897364A CN 111980970 A CN111980970 A CN 111980970A
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China
Prior art keywords
air outlet
air
groove
plate
axial fan
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Granted
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CN202010897364.XA
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CN111980970B (en
Inventor
谢锋
程康康
王明
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Qingdao Shunwei Precision Plastics Co ltd
Guangdong Sunwill Precising Plastic Co Ltd
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Qingdao Shunwei Precision Plastics Co ltd
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Priority to CN202010897364.XA priority Critical patent/CN111980970B/en
Publication of CN111980970A publication Critical patent/CN111980970A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/52Casings; Connections of working fluid for axial pumps
    • F04D29/54Fluid-guiding means, e.g. diffusers
    • F04D29/541Specially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses an air outlet structure of an axial flow fan, which comprises a first air outlet cover, an installation panel and a fan blade main body, wherein the installation panel is fixed on the left side surface of the first air outlet cover through screws, the fan blade main body is installed in the middle of the right side surface of the installation panel, a second air outlet cover is arranged on the inner side wall of the first air outlet cover in a laminating mode, a rotating groove is formed in the right side surface of the first air outlet cover, a rotating block is connected to the inside of the rotating groove in a clamping mode, a fixing plate is installed on the right end of the rotating block through screws, a connecting plate is arranged on the right side of the fixing plate, a connecting rod is installed on the inner side of the connecting plate through screws, and the inside. This axial fan's air-out structure is provided with out the aerofoil, only needs to go out the aerofoil decurrent rotation, need not adjust the inclination of whole fan head, and convenient operation is simple, is convenient for go out the fine wind direction of leading of aerofoil, avoids the wind direction fixed.

Description

Air outlet structure of axial fan
Technical Field
The invention relates to the technical field of axial flow fans, in particular to an air outlet structure of an axial flow fan.
Background
Along with the continuous development and the innovation of science and technology, the fan kind on the market is also diversified, the renewal speed of fan is also comparatively fast, it is different according to the principle of design, the fan divide into the multiple, axial fan is one of numerous fan kind, axial fan means the fan that the during operation air flows with the direction of rotation of the axle of flabellum installation, axial fan is according to the place of using and the difference in field, axial fan's size is also different, axial fan also considers its air-out structure when the design, can improve the stability of axial fan air-out through the design and the improvement of air-out structure, so that axial fan is fine to be used, although axial fan's air-out structure on the market is many, but still have some weak points when using, for example:
1. the air outlet structure of the existing axial flow fan is mostly fixed, so that the wind direction is fixed, when the wind direction needs to be adjusted, only the inclination angle of the whole fan can be adjusted and the rotating button of the fan head is opened, and when the inclination angle of the fan head is often adjusted, the fan head is loosened, and the later use work is influenced;
2. the existing axial flow fan has a single air outlet structure, so that air generated by the axial flow fan can be discharged only from the front of the fan blades, and when people on the side edge of the fan blades need to be blown, the whole fan head needs to be rotated, and the operation is inconvenient;
therefore, we propose an air outlet structure of an axial fan to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide an air outlet structure of an axial flow fan, which aims to solve the problems that the air outlet structure of the existing axial flow fan in the market is mostly fixed and cannot well adjust the wind direction, the air outlet structure of the existing axial flow fan is single, so that the wind generated by the axial flow fan can be discharged only from the front of a fan blade, and when people on the side edge of the fan blade need to be blown, the whole fan head needs to be rotated, and the operation is inconvenient.
In order to achieve the purpose, the invention provides the following technical scheme: an air outlet structure of an axial fan comprises a first air outlet cover, an installation panel and a fan blade main body, wherein the installation panel is fixed on the left side face of the first air outlet cover through screws, the fan blade main body is installed in the middle of the right side face of the installation panel, a second air outlet cover is arranged on the inner side wall of the first air outlet cover in a laminating mode, a rotary groove is formed in the right side face of the first air outlet cover, a rotary block is connected to the inner side of the rotary groove in a clamping mode, a fixing plate is installed on the right end of the rotary block through screws, a connecting plate is arranged on the right side of the fixing plate, a connecting rod is installed on the inner side of the connecting plate through screws, the inner portion of the right side face of the second air outlet cover is connected with an air outlet plate through a damping rotating shaft, a convex block is installed on the outer side of the right end, and the left side of the first containing groove is provided with a second containing groove, the inner part of the first containing groove is clamped with a bump, the lower end of the connecting rod penetrates through the through groove, the outer side of the lower end of the connecting rod is provided with a return spring in an embedded mode, the left end of the return spring is connected with the connecting rod through screw, and the right end of the return spring is connected with the fixing plate through screw.
Preferably, a first air outlet is formed in the front side and the rear side of the first air outlet cover, and the first air outlet cover is arranged in a circular ring-shaped structure.
Preferably, the second air outlet has all been seted up to the upper and lower inside surfaces of second air-out cover, and the number of second air outlet is 1 with the number of first air outlet: 1 and the second air outlet cover is arranged in a T-shaped structure.
Preferably, the fixed plate is the setting of annular shape structure, and the fixed plate constitutes revolution mechanic through rotatory piece and first play fan housing to rotatory piece is unsmooth cooperation with the swivelling chute.
Preferably, the connecting plate is arranged in a circular ring-shaped structure, a distance exists between the connecting plate and the fixing plate, and the inner diameter of the connecting plate is larger than the farthest distance between the symmetrical 2 lugs.
Preferably, the connecting rods are distributed on the inner side of the connecting plate at equal intervals by taking the center point of the connecting plate as a circle center, the connecting rods are arranged in an inverted 7-shaped structure, and the connecting rods and the fixing plate form a sliding structure through the through grooves.
Preferably, the air outlet plate forms a rotating structure with the second air outlet cover through a damping rotating shaft, and the air outlet plate is different in shape and size.
Preferably, the spaces inside the first accommodating groove, the through groove and the second accommodating groove are all communicated, the first accommodating groove is arranged in an arc-shaped structure, and the front side surface of the second accommodating groove is arranged in an opening-shaped structure.
Preferably, the right side surface of the bump is provided with a groove, the groove is clamped and connected with a connecting rod, and the connecting rod and the groove are arranged in a one-to-one correspondence manner.
Compared with the prior art, the invention has the beneficial effects that: the air outlet structure of the axial flow fan comprises:
(1) the air outlet plate is arranged, the air outlet plate and the second air outlet cover form a rotating structure through the damping rotating shaft, the direction of air outlet of air at the front end of the second air outlet cover can be adjusted by adjusting the rotating angle of the air outlet plate, and then when the direction of the air needs to be adjusted upwards, the air outlet plate only needs to be rotated upwards;
(2) the first air outlet and the second air outlet are installed, the second air outlet cover is driven to rotate through the rotation of the fixing plate, so that the second air outlet in the second air outlet cover is overlapped with the first air outlets in the front side and the rear side of the first air outlet cover when the second air outlet cover rotates, the air outlet plate is arranged in a vertical state, air can conveniently flow out of the overlapped first air outlet and second air outlet, and can be conveniently blown to the side edge, when people at the side edge use the fan, the whole fan does not need to be rotated, and the operation is convenient and simple;
(3) the connecting plate is fixed, through pulling of the connecting plate, 4 connecting rods are convenient to synchronously control, so that the connecting rods are separated from the corresponding grooves, the protruding blocks are convenient to rotate from the first accommodating grooves into the second accommodating grooves, the second air outlet cover and the fixing plate are convenient to detach through the opening-shaped structure of the second accommodating grooves, cleaning work is convenient to be carried out on the air outlet plate and the fan blade main body, later-stage installation is also convenient, and then installation and detachment are not needed to be carried out by using screws, so that the external disassembling and installing tools are not needed, and the disassembling and the installing are convenient;
(4) be fixed with rotatory piece, rotatory piece is "T" shape structure setting, and then through the block sliding connection of rotatory piece with rotatory groove to the fixed plate is stable slides rotatoryly inside first play wind cover, is convenient for guarantee from this that the fixed plate is fine rotates, improves the fixed plate and drives the second and go out the rotatory steadiness of wind cover, still avoids fixed plate and first play wind cover to take place to drop simultaneously.
Drawings
FIG. 1 is a side cross-sectional structural schematic view of the present invention;
FIG. 2 is a schematic sectional view of the first outlet housing and the fixing plate;
FIG. 3 is a right-view structural diagram of the connection between the fixing plate and the second outlet housing according to the present invention;
FIG. 4 is an enlarged view of the structure at B in FIG. 3 according to the present invention;
FIG. 5 is a schematic right sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 6 is a right side view of the structure of the rotary slot of the present invention;
FIG. 7 is a left side view of the rotating block of the present invention.
In the figure: 1. a first air outlet cover; 2. installing a panel; 3. a fan blade main body; 4. a second air outlet cover; 5. a second air outlet; 6. a first air outlet; 7. a fixing plate; 8. a connecting plate; 9. a connecting rod; 10. an air outlet plate; 11. a damping rotating shaft; 12. a rotating tank; 13. rotating the block; 14. a first accommodating groove; 15. a bump; 16. a groove; 17. a return spring; 18. a through groove; 19. a second receiving groove.
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.
Referring to fig. 1-7, the present invention provides a technical solution: an air outlet structure of an axial flow fan comprises a first air outlet cover 1, a mounting panel 2, a fan blade body 3, a second air outlet cover 4, a second air outlet 5, a first air outlet 6, a fixing plate 7, a connecting plate 8, a connecting rod 9, an air outlet plate 10, a damping rotating shaft 11, a rotating groove 12, a rotating block 13, a first accommodating groove 14, a convex block 15, a groove 16, a reset spring 17, a through groove 18 and a second accommodating groove 19, wherein the mounting panel 2 is fixed on the left side surface of the first air outlet cover 1 through screws, the fan blade body 3 is installed in the middle of the right side surface of the mounting panel 2, the second air outlet cover 4 is placed on the inner side wall of the first air outlet cover 1 in an attaching mode, the rotating groove 12 is formed in the right side surface of the first air outlet cover 1, the rotating block 13 is connected to the rotating groove 12 in a clamping mode, the fixing plate 7 is installed on the, a connecting rod 9 is mounted on the inner side of the connecting plate 8 through a screw, the inner portion of the right side face of the second air outlet housing 4 is connected with an air outlet plate 10 through a damping rotating shaft 11, a bump 15 is mounted on the outer side of the right end of the second air outlet housing 4 through a screw, a first accommodating groove 14, a through groove 18 and a second accommodating groove 19 are formed in the inner side wall of the fixing plate 7, a through groove 18 is formed in the right side of the first accommodating groove 14, a second accommodating groove 19 is formed in the left side of the first accommodating groove 14, the bump 15 is clamped and placed in the first accommodating groove 14, the lower end of the connecting rod 9 penetrates through the through groove 18, a return spring 17 is nested in the outer side of the lower end of the connecting rod 9, the left end of;
the front side and the rear side of the first air outlet housing 1 are internally provided with first air outlets 6, the first air outlet housing 1 is arranged in a ring-shaped structure, therefore, the front side and the rear side of the first air outlet housing 1 are internally provided with the first air outlets 6, the first air outlet housing 1 is arranged in a ring-shaped structure, and then the first air outlet housing 1 is arranged in a ring-shaped structure, so that the first air outlet housing 1 is in concave-convex fit with the second air outlet housing 4, the second air outlet housing 4 can rotate in the later period, and the front side and the rear side of the first air outlet housing 1 are internally provided with the first air outlets 6, so that the later-period multi-directional air exhaust work can be facilitated, and the requirements of different people;
the second goes out the upper and lower inside surfaces of fan housing 4 and has all seted up second air outlet 5, and the number of second air outlet 5 and the number of first air outlet 6 are 1: 1 setting to the second goes out fan housing 4 and is "T" shape structure setting, has all seted up second air outlet 5 through the upper and lower inside surfaces of second play fan housing 4, and the number of second air outlet 5 and the number of first air outlet 6 are 1: 1, so that the second air outlet 5 is coincided with the first air outlet 6 when the second air outlet housing 4 rotates in the later period, and the air flows to the side edge conveniently;
the fixed plate 7 is arranged in a circular ring-shaped structure, the fixed plate 7 and the first air outlet cover 1 form a rotating structure through the rotating block 13, the rotating block 13 and the rotating groove 12 are in concave-convex fit, the fixed plate 7 is arranged in a circular ring-shaped structure, the fixed plate 7 and the first air outlet cover 1 form a rotating structure through the rotating block 13, so that the fixed plate 7 can well drive the second air outlet cover 4 to rotate, the second air outlet cover 4 can conveniently enable the second air outlet 5 and the first air outlet 6 to coincide when rotating, and the later-stage air exhaust direction adjustment is facilitated, so that the air exhaust structure is diversified;
the connecting plate 8 is arranged in a circular ring-shaped structure, a distance exists between the connecting plate 8 and the fixing plate 7, the inner diameter of the connecting plate 8 is larger than the farthest distance between the symmetrical 2 convex blocks 15, the distance exists between the connecting plate 8 and the fixing plate 7, and the inner diameter of the connecting plate 8 is larger than the farthest distance between the symmetrical 2 convex blocks 15, so that the convex blocks 15 can be pulled out from the second accommodating grooves 19 well in the later period, the connecting plate 8 is prevented from blocking the pull-out of the convex blocks 15, and the disassembly work is performed well;
the connecting rods 9 are distributed on the inner side of the connecting plate 8 at equal intervals by taking the central point of the connecting plate 8 as a circle center, the connecting rods 9 are arranged in an inverted 7-shaped structure, the connecting rods 9 and the fixing plate 7 form a sliding structure through the through grooves 18, and then the connecting rods 9 are arranged in the inverted 7-shaped structure, so that the connecting rods 9 can be pulled, and the connecting rods 9 and the lugs 15 can be clamped and connected or separated conveniently;
the air outlet plate 10 and the second air outlet cover 4 form a rotating structure through the damping rotating shaft 11, the shape of the air outlet plate 10 is different in size, the air outlet plate 10 and the second air outlet cover 4 form a rotating structure through the damping rotating shaft 11, so that the inclination angle of the air outlet plate 10 can be adjusted to adjust the air discharging direction, the shape of the air outlet plate 10 is different in size, so that a round plate formed by splicing a plurality of air outlet plates 10 in a vertical state at the later stage can shield and close the front side surface of the second air outlet cover 4, so that air can be discharged from the second air outlet 5 and the first air outlet 6 at the later stage, the requirements of different users can be met, and the operation is simple;
the space inside the first accommodating groove 14, the through groove 18 and the second accommodating groove 19 are communicated, the first accommodating groove 14 is arranged in an arc-shaped structure, the front side surface of the second accommodating groove 19 is arranged in an open-ended structure, the space inside the first accommodating groove 14, the through groove 18 and the second accommodating groove 19 is communicated, the first accommodating groove 14 is arranged in an arc-shaped structure, the front side surface of the second accommodating groove 19 is arranged in an open-ended structure, so that the bump 15 can be clamped and mounted in the later period, the second air outlet cover 4 can be well mounted and fixed with the fixing plate 7, and the fixing plate 7 can be driven to rotate together with the second air outlet cover 4 when rotating;
the inside recess 16 of seting up of the right flank of lug 15, and the inside block of recess 16 is connected with connecting rod 9, and connecting rod 9 is the one-to-one setting with recess 16, through the setting of recess 16, be convenient for carry out the block with connecting rod 9 and lug 15 and be connected, improve the steadiness of lug 15 block in first storage tank 14, so that the stable rotation that goes on of drive second play fan housing 4 of later stage fixed plate 7 rotation stability, so that adjust the position of second air outlet 5.
The working principle of the embodiment is as follows: when the air outlet structure of the axial flow fan is used, firstly, as shown in the attached drawing 1, the whole air outlet structure and the mounting panel 2 are mounted through screws, then, the whole air outlet structure can be used, the whole fan is started in the using process, a power source and a mechanical structure in the fan drive the fan blade main body 3 to rotate, so that the fan blade main body 3 generates certain air volume, at the moment, air is discharged from gaps between the air outlet plates 10 and the air outlet plates 10 as shown in the attached drawings 1 and 3, so that the air can be well discharged, when the direction of air exhaust needs to be downwards adjusted, at the moment, the air outlet plates 10 are manually rotated downwards as shown in the attached drawings 1 and 3-4, so that gaps exist between the air outlet plates 10 and the air outlet plates 10, and then the air is obliquely and downwards discharged through the inclined air outlet plates 10, and similarly, when the air needs to be slightly upwards discharged, in the same way, the air outlet plates 10 are rotated upwards manually, so that a space exists between the air outlet plates 10 and the air outlet plates 10, and then the air is discharged upwards slightly in an inclined manner through the inclined air outlet plates 10, the operation is convenient and simple, and the fan head does not need to be adjusted;
when the wind needs to be blown out from the left side and the right side, as shown in fig. 1-2 and fig. 5, the fixing plate 7 is manually rotated, at this time, the rotating block 13 on the left side of the fixing plate 7 rotates in the rotating groove 12, as shown in fig. 6-7, the rotating groove 12 and the rotating block 13 are both arranged in a circular ring-shaped structure, so that the rotating block 13 can be conveniently clamped and slidably connected in the rotating groove 12, and meanwhile, the rotating groove 12 and the rotating block 13 are both arranged in a "T" -shaped structure, so that the fixing plate 7 can be stably rotated, so that the fixing plate 7 can drive the second air outlet cover 4 which is clamped and connected to rotate together when rotating, further, the second air outlet cover 4 can be rotated to the inner part, the second air outlet 5 corresponds to the inner part of the first air outlet cover 1, and meanwhile, the air outlet plates 10 can be manually rotated to the vertical state through, furthermore, a plurality of air outlet plates 10 with different shapes are combined into a circular plate to close the opening at the front end of the second air outlet housing 4, so that air is discharged from the second air outlet 5 and the first air outlet 6, and then people on the side can be well blown, the whole fan does not need to be moved and rotated for adjustment, and the operation is more convenient;
when the fan blade is needed to be disassembled to clean the air outlet plate 10 and the fan blade body 3 after being used for a period of time, as shown in fig. 2-4, the connecting plate 8 is pulled outwards manually, so that the connecting plate 8 drives the connecting rod 9 to move, further the connecting rod 9 is separated from the corresponding groove 16, then the second air outlet cover 4 is rotated manually, so that the second air outlet cover 4 drives the lug 15 fixed by the outer screw to rotate from the first accommodating groove 14 to the second accommodating groove 19, then the connecting plate 8 is loosened, then the second air outlet cover 4 is pulled outwards, so that the second air outlet cover 4 drives the lug 15 to be pulled out from the corresponding second accommodating groove 19, further the second air outlet cover 4 is conveniently disassembled, so that the air outlet plate 10 and the fan blade body 3 are cleaned, the disassembling operation is convenient, the later-stage assembling work is facilitated without the help of an external disassembling tool, thereby completing a series of works.
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 can be made without departing from the spirit and scope of the invention.

Claims (9)

1. The utility model provides an axial fan's air-out structure, includes first air-out cover (1), mounting panel (2) and flabellum main part (3), its characterized in that: the left surface fix with screw of first air-out cover (1) has installation panel (2), and the right flank mid-mounting of installation panel (2) has flabellum main part (3) to the inside wall laminating of first air-out cover (1) has placed second air-out cover (4), swivelling chute (12) have been seted up to the right flank of first air-out cover (1), and the inside block of swivelling chute (12) is connected with swivel block (13), and the right-hand member bolted mounting of swivel block (13) has fixed plate (7), the right side of fixed plate (7) is provided with connecting plate (8), and the inboard bolted mounting of connecting plate (8) has connecting rod (9), the right flank inside of second air-out cover (4) is connected with air-out board (10) through damping pivot (11), lug (15) have been installed to the right-hand member outside bolted mounting of second air-out cover (4), first storage tank (14) have been seted up to the inside wall of fixed plate (, The connecting rod comprises a through groove (18) and a second accommodating groove (19), wherein the through groove (18) is formed in the right side of the first accommodating groove (14), the second accommodating groove (19) is formed in the left side of the first accommodating groove (14), a bump (15) is clamped and placed in the first accommodating groove (14), the lower end of the connecting rod (9) penetrates through the through groove (18), a reset spring (17) is nested and arranged on the outer side of the lower end of the connecting rod (9), the left end of the reset spring (17) is in screw connection with the connecting rod (9), and the right end of the reset spring (17) is in screw connection with the fixing plate (7).
2. The air outlet structure of the axial fan according to claim 1, wherein: first air outlet (6) have all been seted up to side inside around first air-out cover (1), and first air-out cover (1) is the setting of annular shape structure.
3. The air outlet structure of the axial fan according to claim 2, wherein: second air outlet (5) have all been seted up to the upper and lower surperficial inside of second air-out cover (4), and the number of second air outlet (5) and the number of first air outlet (6) are 1: 1 and a second air outlet cover (4) is arranged in a T-shaped structure.
4. The air outlet structure of the axial fan according to claim 1, wherein: fixed plate (7) are the setting of annular shape structure, and fixed plate (7) constitute revolution mechanic through rotatory piece (13) and first play wind cover (1) to rotatory piece (13) are unsmooth cooperation with rotatory groove (12).
5. The air outlet structure of the axial fan according to claim 1, wherein: the connecting plate (8) is arranged in a circular ring-shaped structure, a distance exists between the connecting plate (8) and the fixing plate (7), and the inner diameter of the connecting plate (8) is larger than the farthest distance between the symmetrical 2 convex blocks (15).
6. The air outlet structure of the axial fan according to claim 1, wherein: the connecting rods (9) are distributed on the inner side of the connecting plate (8) at equal intervals by taking the central point of the connecting plate (8) as the circle center, the connecting rods (9) are arranged in an inverted 7-shaped structure, and the connecting rods (9) and the fixing plate (7) form a sliding structure through the through grooves (18).
7. The air outlet structure of the axial fan according to claim 1, wherein: the air outlet plate (10) and the second air outlet cover (4) form a rotating structure through a damping rotating shaft (11), and the air outlet plate (10) is different in shape and size.
8. The air outlet structure of the axial fan according to claim 1, wherein: the spaces inside the first accommodating groove (14), the through groove (18) and the second accommodating groove (19) are communicated, the first accommodating groove (14) is arranged in an arc-shaped structure, and the front side surface of the second accommodating groove (19) is arranged in an opening-shaped structure.
9. The air outlet structure of the axial fan according to claim 1, wherein: the inner portion of the right side face of the convex block (15) is provided with a groove (16), the inner portion of the groove (16) is connected with a connecting rod (9) in a clamping mode, and the connecting rod (9) and the groove (16) are arranged in a one-to-one correspondence mode.
CN202010897364.XA 2020-08-31 2020-08-31 Air outlet structure of axial fan Active CN111980970B (en)

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CN111980970B CN111980970B (en) 2022-02-11

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KR102140108B1 (en) * 2019-11-11 2020-08-04 이나연 An electric fan with wind concentration structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113084603A (en) * 2021-04-27 2021-07-09 昆山全泰信息科技服务有限公司 3C product surface polishing and grinding device and machining process thereof

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