CN213450949U

CN213450949U - Low-noise centrifugal fan

Info

Publication number: CN213450949U
Application number: CN202022615696.2U
Authority: CN
Inventors: 高峰
Original assignee: Jiujiang Xunxing Ventilation Equipment Co ltd
Current assignee: Jiujiang Xunxing Ventilation Equipment Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-06-15
Anticipated expiration: 2030-11-12

Abstract

The utility model provides a low-noise centrifugal fan, which comprises a shell, wherein the bottom of the shell is symmetrically provided with supporting legs, the center of one side of the shell is provided with a net piece, the upper part of the shell is provided with an air outlet pipeline, one side of the shell, which is far away from the net piece, is provided with a supporting seat, and the upper part of the supporting seat is provided with a motor; the shell inner wall is equipped with the amortization layer, the amortization layer inner wall is equipped with first reflection pipe, the amortization layer includes the panel, the inside fibrous layer that is equipped with of panel, the inside cotton board that is equipped with of fibrous layer, the inside skeleton that is equipped with of cotton board. This centrifugal fan of low noise, the component is simple, effectively weakens the intensity of sound, reduces the noise.

Description

Low-noise centrifugal fan

Technical Field

The utility model relates to a centrifugal fan's technical field specifically is a centrifugal fan of low noise.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.

For example, patent No. 201020129439.1 includes a pre-filter, a centrifugal fan, a fan box, a plenum box and a high efficiency air filter, which is characterized in that the pre-filter and the high efficiency air filter are respectively arranged as the top and bottom of a clean hood, the fan box is arranged at the lower side of the pre-filter, one centrifugal fan and the pre-filter are horizontally arranged in the fan box correspondingly, or two centrifugal fans are arranged in the fan box correspondingly opposite to the pre-filter; the side wall of the static pressure box corresponding to the air outlet pipeline of the centrifugal fan and connected between the pre-filter and the high-efficiency air filter in a sealing way at two sides is in a slope shape with smooth break angles; the air outlet pipeline of the centrifugal fan is provided with a variable-inclination fixed blade type shutter flow equalizer.

Although the uniformity of static pressure distribution at each part of the windward side of the high-efficiency filter is improved, the air outlet speed is more uniform, and the air outlet speed and the air pressure are proper, the generated noise cannot be weakened when the centrifugal fan rotates at a high speed and operates.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides a centrifugal fan of low noise for solve the technical problem who proposes in the above-mentioned background art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a low-noise centrifugal fan comprises a shell, wherein supporting legs are symmetrically arranged at the bottom of the shell, a net piece is arranged at the center of one side of the shell, an air outlet pipeline is arranged at the upper part of the shell, a supporting seat is arranged at one side of the shell, which is far away from the net piece, and a motor is arranged at the upper part of the supporting seat;

the shell inner wall is equipped with the amortization layer, the amortization layer inner wall is equipped with first reflection pipe, the amortization layer includes the panel, the inside fibrous layer that is equipped with of panel, the inside cotton board that is equipped with of fibrous layer, the inside skeleton that is equipped with of cotton board.

Preferably, the panel is connected with the inner wall of the shell in an adhesive manner, so that the components can be conveniently connected.

Preferably, first reflecting pipe outer wall a week equidistance is equipped with a plurality of sand grips, and every two link to each other be equipped with first hole between the sand grip, first hole is equipped with a plurality ofly, and a plurality of first hole ring first reflecting pipe wall a week sets up, helps weakening gaseous sound intensity through the reflection.

Preferably, the inside second reflection pipe that is equipped with of air-out pipeline, second reflection pipe outer wall a week evenly is equipped with the second hole, second reflection bottom of the tubes portion is equipped with the pillar, second reflection one end and air-out pipeline inner wall fixed connection are kept away from to the pillar, help weakening the intensity of sound once more at air-out pipeline.

Preferably, the pipe wall of the second reflecting pipe is not in contact with the inner wall of the air outlet pipeline, so that a buffering space is provided for weakened sound.

Compared with the prior art, the beneficial effects of the utility model are that:

this centrifugal fan of low noise, the inside noise damping layer that is equipped with of casing, panel through the noise damping layer, the fibrous layer, the cotton board, the skeleton, make isolated sound's outside transmission, the noise damping inlayer inner wall is equipped with first speculum, first speculum outer wall evenly is equipped with first hole, first speculum outer wall is equipped with the sand grip, the sand grip is the heliciform around first speculum outer wall, help through the collision, weaken the intensity of sound energy, the casing top is equipped with out the tuber pipe way, it is equipped with the second speculum to go out the tuber pipe inner wall, the second speculum outer wall evenly is equipped with the second hole, second speculum pipe wall and air-out pipeline inner wall contactless, help weakening the intensity of sound once more at the air-out pipeline.

The present invention will be explained in detail with reference to the drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the sectional structure of the housing of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a schematic view of a first reflective tube structure according to the present invention;

fig. 5 is a schematic view of the sectional structure of the air outlet duct of the present invention;

fig. 6 is a schematic diagram of a second reflective tube structure according to the present invention.

In the figure: 1. a housing; 11. supporting legs; 12. a mesh sheet; 13. an air outlet pipeline; 131. a second reflection tube; 1311. a second hole; 1312. a pillar; 14. a sound-deadening layer; 141. a panel; 142. a fibrous layer; 143. a cotton board; 144. a framework; 15. a first reflection tube; 151. a first hole; 152. a convex strip; 2. a supporting seat; 3. an electric motor.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully with reference to the accompanying drawings, in which several embodiments of the present invention are shown, but the present invention can be implemented in different forms, and is not limited to the embodiments described in the text, but rather, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the use of the term knowledge in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1-6, the present invention provides a technical solution: a low-noise centrifugal fan comprises a shell 1, wherein supporting legs 11 are symmetrically arranged at the bottom of the shell 1, a net piece 12 is arranged at the center of one side of the shell 1, an air outlet pipeline 13 is arranged at the upper part of the shell 1, a supporting seat 2 is arranged at one side, away from the net piece 12, of the shell 1, and a motor 3 is arranged at the upper part of the supporting seat 2;

the inner wall of the shell 1 is provided with a sound-absorbing layer 14, the inner wall of the sound-absorbing layer 14 is provided with a first reflection tube 15, the sound-absorbing layer 14 comprises a panel 141, a fiber layer 142 is arranged inside the panel 141, a cotton board 143 is arranged inside the fiber layer 142, and a framework 144 is arranged inside the cotton board 143.

Referring again to fig. 3, the panel 141 is adhesively attached to the inner wall of the housing 1 to facilitate attachment of the components.

Please refer to fig. 4, a plurality of protruding strips 152 are equidistantly arranged around the outer wall of the first reflection tube 15, a first hole 151 is arranged between every two connected protruding strips 152, the first holes 151 are provided in plurality, and the plurality of first holes 151 are arranged around the tube wall of the first reflection tube (15) to reduce the sound intensity of the gas by reflection.

Please refer to fig. 5-6 again, the inside of the air outlet duct 13 is provided with the second reflection pipe 131, a circumference of the outer wall of the second reflection pipe 131 is uniformly provided with the second holes 1311, the bottom of the second reflection pipe 131 is provided with the support 1312, one end of the support 1312 far away from the second reflection pipe 131 is fixedly connected with the inner wall of the air outlet duct 13, and the pipe wall of the second reflection pipe 131 is not in contact with the inner wall of the air outlet duct 13, which is helpful for weakening the sound intensity again in the air outlet duct 13.

The utility model discloses a concrete operation as follows:

this centrifugal fan of low noise, the inside noise damping layer 14 that is equipped with of casing 1, through panel 141 in the noise damping layer 14, fibrous layer 142, cotton board 143, skeleton 144, make isolated sound's transmission outside, noise damping layer 14 inner wall is equipped with first reflecting tube 15, first reflecting tube 15 outer wall evenly is equipped with first hole 151, first reflecting tube 15 outer wall is equipped with sand grip 152, sand grip 152 is the heliciform around first reflecting tube 15 outer wall, help through the collision, weaken the intensity of sound energy, casing 1 top is equipped with air-out pipeline 13, air-out pipeline 13 inner wall is equipped with second reflecting tube 131, second reflecting tube 131 outer wall evenly is equipped with second hole 1311, second reflecting tube 131 pipe wall and air-out pipeline 13 inner wall contactless, help weakening the intensity of sound once more at air-out pipeline 13.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, if the method and the technical solution of the present invention are adopted, the present invention can be directly applied to other occasions without substantial improvement, and the present invention is within the protection scope of the present invention.

Claims

1. A low-noise centrifugal fan comprises a shell (1), and is characterized in that supporting legs (11) are symmetrically arranged at the bottom of the shell (1), a net piece (12) is arranged at the center of one side of the shell (1), an air outlet pipeline (13) is arranged at the upper part of the shell (1), a supporting seat (2) is arranged at one side of the shell (1) far away from the net piece (12), and a motor (3) is arranged at the upper part of the supporting seat (2);

casing (1) inner wall is equipped with noise damping layer (14), noise damping layer (14) inner wall is equipped with first reflection pipe (15), noise damping layer (14) are including panel (141), panel (141) inside is equipped with fibrous layer (142), inside cotton board (143) that is equipped with of fibrous layer (142), inside skeleton (144) that is equipped with of cotton board (143).

2. A centrifugal fan with reduced noise according to claim 1, characterized in that the panel (141) is adhesively connected to the inner wall of the housing (1).

3. The centrifugal fan with low noise according to claim 1, wherein a plurality of ribs (152) are equidistantly arranged around the outer wall of the first reflection pipe (15), a first hole (151) is arranged between every two adjacent ribs (152), the first holes (151) are arranged in a plurality, and the plurality of first holes (151) are arranged around the wall of the first reflection pipe (15).

4. The centrifugal fan with low noise according to claim 1, wherein a second reflection pipe (131) is arranged inside the air outlet pipe (13), a second hole (1311) is uniformly formed in a circle of an outer wall of the second reflection pipe (131), a support column (1312) is arranged at the bottom of the second reflection pipe (131), and one end, far away from the second reflection pipe (131), of the support column (1312) is fixedly connected with an inner wall of the air outlet pipe (13).

5. A centrifugal fan with low noise according to claim 4, wherein the wall of the second reflection pipe (131) is not in contact with the inner wall of the air outlet pipeline (13).