CN214221551U

CN214221551U - Low-noise air blower

Info

Publication number: CN214221551U
Application number: CN202022655032.9U
Authority: CN
Inventors: 万珍平; 邹金虎; 朱行; 老嘉铭
Original assignee: Zhongshan Institute of Modern Industrial Technology of South China University of Technology
Current assignee: Zhongshan Institute of Modern Industrial Technology of South China University of Technology
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-09-17
Anticipated expiration: 2030-11-16

Abstract

The utility model discloses a low noise air-blower relates to centrifugal blower technical field. The utility model discloses a fan spiral case, it has the motor to inlay on the back lateral wall of fan spiral case, and the other lateral wall of fan spiral case passes through bolt and metal mesh enclosure fixed connection, and the preceding lateral wall center department of fan spiral case is provided with the air intake. The utility model discloses a shell plate, inhale the sound cotton and inhale the sound cavity, inhale the cotton partial noise that absorbs of sound, turn into sound absorbing material's heat energy with gaseous kinetic energy, absorb partial noise again after inhaling the reflection of sound cavity and outer shell plate, curved formula blade can improve fan efficiency and noise reduction simultaneously, effectual reduction produces the air flow separation that the negative velocity district and lead to behind the blade, the zigzag structure that the blade exit end set up, can make blade tail end laminar flow boundary layer convert the turbulent flow earlier, avoid the unstable waveguide in the laminar flow boundary layer to cause the vortex separation, the great problem of current air-blower noise has been solved.

Description

Low-noise air blower

Technical Field

The utility model belongs to the technical field of centrifugal blower, especially, relate to a low noise air-blower.

Background

With the development of society, centrifugal blowers are widely applied in production and life, and are mainly applied to ventilation of factories, ventilation of air conditioning equipment and household electrical equipment, blast inflation of inflatable products and the like. At present, a centrifugal blower mainly comprises a volute, an impeller, an air inlet, an air outlet, a motor and the like, and the working principle is that the motor drives the impeller to rotate, and the rotating mechanical energy of blades is converted into the kinetic energy and the pressure energy of air, so that the effect of continuous exhaust is realized. The centrifugal blower has mature technology, small volume and low price, but can generate large wind pressure and gas flow, and is popular in the market.

The low-noise blower in the prior stage has the following defects;

1. when the low-noise blower is used, the noise generated by the centrifugal blower is large, and the normal life of people is easily influenced; the centrifugal blower noise is divided into motor noise, rotational noise, and eddy current noise, wherein the amplitude of the rotational noise is the largest.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low noise air-blower, through the shell plate, inhale the sound cotton and inhale the sound cavity, the shell plate is provided with the three-layer altogether when using, the fan operation in-process, inhale the cotton partial noise of sound absorption, turn into sound absorbing material's heat energy with gaseous kinetic energy, absorb partial noise again after inhaling the reflection of sound cavity and outer shell plate, thereby reduce the noise figure of whole air-blower, curved blade can improve fan efficiency and reduce the noise simultaneously, and length alternating arrangement, can effectually reduce the air current separation that produces the negative velocity district and lead to behind the blade, the zigzag structure that the blade exit end set up, can make blade tail end laminar flow boundary layer turn into the turbulent flow earlier, avoid the unstable waveguide in the laminar flow boundary layer to cause the vortex separation, the great problem of current air-blower noise has been solved.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to a low noise air-blower, including the fan spiral case, it has the motor to inlay on the back lateral wall of fan spiral case, and the other lateral wall of fan spiral case passes through bolt and metal mesh enclosure fixed connection, the spiral case radially adopts the inlayer shell plate, inhales the sound cotton, middle level shell plate, inhales the structure of sound cavity, outer shell plate, the below of motor, the lateral wall of fan spiral case pass through bolt and base fixed connection, the preceding lateral wall center department of fan spiral case is provided with the air intake.

Furthermore, the bottom side wall of the fan volute is welded with supporting legs, the fan volute is fixedly connected with the damp-proof plate through the supporting legs, the right side wall of the fan volute is provided with an air outlet, an air outlet pipe is connected to the air outlet in a riveting mode, and a connecting pipe is sleeved on the outer wall of the tail end of the air outlet pipe.

Furthermore, the inside outer shell plate that is provided with in the top side of fan spiral case, and the inboard of outer shell plate is provided with inhales the sound cavity, it has the middle level shell plate to bond on the inside wall of inhaling the sound cavity, and the below of middle level shell plate bonds and has the inlayer shell plate, and it has the sound cotton of inhaling to fill between middle level shell plate and the inlayer shell plate.

Further, the inside of fan spiral case is provided with the wind wheel group, and the wind wheel group includes short blade, long blade and back plate, long blade and short blade are the setting of back bend formula mechanism, and long blade and short blade all set up about the central point annular array of back plate.

Furthermore, the long blade is provided with eight groups with the short blade altogether, and the long blade all is tilting mechanism welding on the lateral wall of back dish with the short blade, and the long blade is equidistant alternate setting with the short blade.

Furthermore, the rear side wall of the rear disc is welded with connecting plates, the rear disc is fixedly connected with a rotating shaft of the motor through the connecting plates, and the outer side walls of the short blades and the long blades are provided with sawtooth grooves.

The utility model discloses following beneficial effect has:

1. the utility model discloses a set up the wind wheel group, the back bend formula blade can improve fan efficiency and noise reduction, and length alternating arrangement, can effectual reduction produce the air current separation that the negative velocity district leads to after the blade, the zigzag structure that the blade exit end set up can make blade tail end laminar flow boundary layer change the turbulent flow earlier, avoid the unstable waveguide in the laminar flow boundary layer to cause the vortex separation, solved because of gas loss and vortex phenomenon lead to the problem that the air-blast opportunity produces great noise.

2. The utility model discloses a set up the shell plate, inhale the sound cotton and inhale the sound cavity, the shell plate is provided with the three-layer altogether when using, and the cotton partial noise that absorbs of sound is inhaled to fan operation in-process, turns into sound absorbing material's heat energy with gaseous kinetic energy, and the partial noise is reabsorbed after inhaling the reflection of sound cavity and outer shell plate to reduce the noise figure of whole air-blower, solved the air-blower in the present stage when the operation air and the problem that the collision of fan inner wall can produce great decibel noise.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a right side view of a low noise blower configuration;

fig. 2 is a front view of the structure of the present invention;

FIG. 3 is an enlarged view of the structure A of FIG. 1 according to the present invention;

FIG. 4 is a front view of a blade of the present invention;

fig. 5 is a side view of the blade of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a fan volute; 101. supporting legs; 102. a moisture-proof plate; 103. an air outlet; 1031. an air outlet pipe; 104. connecting the pipe; 2. a motor; 3. a metal mesh enclosure; 4. a base; 5. an air inlet; 6. an outer skin plate; 7. a sound-absorbing cavity; 8. a middle shell plate; 9. sound-absorbing cotton; 10. an inner shell plate; 11. a wind wheel set; 12. short blades; 13. a long blade; 14. a rear disc; 1401. a connector tile; 1402. a sawtooth groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention relates to a low noise blower, which comprises a blower volute 1, wherein a motor 2 is embedded on the rear side wall of the blower volute 1, the other side wall of the blower volute 1 is fixedly connected to a metal mesh enclosure 3 through a bolt, the lower side of the motor 2 and the outer side wall of the blower volute 1 are fixedly connected to a base 4 through bolts, and an air inlet 5 is disposed at the center of the front side wall of the blower volute 1.

As shown in fig. 1-3, an outer shell 6 is disposed inside the top side of the blower volute 1, a sound-absorbing cavity 7 is disposed inside the outer shell 6, a middle shell 8 is bonded to the inner side wall of the sound-absorbing cavity 7, an inner shell 10 is bonded below the middle shell 8, sound-absorbing cotton 9 is filled between the middle shell 8 and the inner shell 10, supporting legs 101 are welded to the bottom side wall of the blower volute 1, the blower volute 1 is fixedly connected to a damp-proof plate 102 through the supporting legs 101, an air outlet 103 is disposed on the right side wall of the blower volute 1, an air outlet tube 1031 is riveted to the air outlet 103, and a connecting tube 104 is sleeved to the outer end wall of the air outlet tube 1031.

As shown in fig. 1, 4, and 5, a wind wheel set 11 is disposed inside the fan volute 1, the wind wheel set 11 includes a short blade 12, a long blade 13 and a back plate 14, the long blade 13 and the short blade 12 are set in a backward bending mechanism, the long blade 13 and the short blade 12 are both set in an annular array with respect to a central point of the back plate 14, eight sets of the long blade 13 and the short blade 12 are both set, the long blade 13 and the short blade 12 are both welded on an outer sidewall of the back plate 14 in an inclined mechanism, the long blade 13 and the short blade 12 are equidistantly arranged at intervals, a connecting plate 1401 is welded on a back sidewall of the back plate 14, the back plate 14 is fixedly connected to a rotating shaft of the motor 2 through the connecting plate 1401, and sawtooth grooves 1042 are disposed on outer sidewalls of the short blade 12 and the long blade 13.

When the device is used, a power supply of the device is switched on, when the motor 2 rotates, the wind wheel set 11 is driven to rotate anticlockwise, gas enters from the air inlet 5 and fills between the long blades 13 and the short blades 12 of the wind wheel set 11, the gas obtains kinetic energy along with the high-speed rotation of the blades, and as the blades are backward-bent, the resistance between the blades and the gas is small, and the noise of hitting the gas is small; the alternate long and short blades enable few vortexes to be generated between the two blades, the airflow speed directions are consistent, and the airflow speed directions are thrown to the fan volute 1 along the radial direction under the action of centrifugal force, so that the pressure energy is increased; when the blades rotate to the air outlet 103, the air is discharged along the air outlet pipe 1031, laminar flow is converted into turbulent flow when passing through the metal mesh enclosure 3, separation of boundary layers at the outlet is reduced, air flow velocity and pressure gradient can be rapidly uniform, and noise reduction is facilitated; at the moment, negative pressure is formed in the middle of the blade, and the air outside the fan volute 1 is continuously pressed and supplemented from the air inlet 5 by the atmosphere; in the running process of the fan, the sound absorption cotton 9 absorbs partial noise, converts gas kinetic energy into heat energy of the sound absorption material, and absorbs partial noise after being reflected by the sound absorption cavity 7 and the outer shell plate 6, so that the noise value of the whole fan is reduced.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only the preferred embodiment of the present invention, and the present invention is not limited thereto, any technical solution recorded in the foregoing embodiments is modified, and some technical features are replaced by equivalent, all belonging to the protection scope of the present invention.

Claims

1. The utility model provides a low noise air-blower, includes fan spiral case (1), its characterized in that: the fan volute is characterized in that a motor (2) is inlaid on the rear side wall of the fan volute (1), the other side wall of the fan volute (1) is fixedly connected with a metal net cover (3) through bolts, the lower side of the motor (2) and the outer side wall of the fan volute (1) are fixedly connected with a base (4) through bolts, and an air inlet (5) is formed in the center of the front side wall of the fan volute (1).

2. The low-noise blower according to claim 1, wherein the bottom side wall of the blower volute (1) is welded with supporting legs (101), the blower volute (1) is fixedly connected with the moisture-proof plate (102) through the supporting legs (101), the right side wall of the blower volute (1) is provided with an air outlet (103), the air outlet (103) is connected with an air outlet pipe (1031) in a riveting manner, and the outer wall of the tail end of the air outlet pipe (1031) is sleeved with a connecting pipe (104).

3. The low-noise blower according to claim 1, wherein an outer shell plate (6) is arranged inside the top side of the blower volute (1), a sound-absorbing cavity (7) is arranged inside the outer shell plate (6), a middle shell plate (8) is bonded on the inner side wall of the sound-absorbing cavity (7), an inner shell plate (10) is bonded below the middle shell plate (8), and sound-absorbing cotton (9) is filled between the middle shell plate (8) and the inner shell plate (10).

4. The low-noise blower according to claim 1, wherein the blower volute (1) is internally provided with a blower wheel set (11), the blower wheel set (11) comprises a short blade (12), a long blade (13) and a rear disk (14), the long blade (13) and the short blade (12) are arranged in a backward bending mechanism, and the long blade (13) and the short blade (12) are arranged in an annular array around the central point of the rear disk (14).

5. A low noise blower according to claim 4, wherein eight sets of long blades (13) and short blades (12) are provided, and the long blades (13) and the short blades (12) are welded to the outer side wall of the rear disk (14) in a tilting mechanism, and the long blades (13) and the short blades (12) are arranged at equal intervals.

6. The low-noise blower according to claim 5, wherein a connecting plate (1401) is welded on the rear side wall of the rear disk (14), the rear disk (14) is fixedly connected with the rotating shaft of the motor (2) through the connecting plate (1401), and the outer side walls of the short blades (12) and the long blades (13) are provided with sawtooth grooves (1402).