CN212563698U - Low-noise centrifugal fan structure - Google Patents
Low-noise centrifugal fan structure Download PDFInfo
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- CN212563698U CN212563698U CN202021244100.6U CN202021244100U CN212563698U CN 212563698 U CN212563698 U CN 212563698U CN 202021244100 U CN202021244100 U CN 202021244100U CN 212563698 U CN212563698 U CN 212563698U
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Abstract
The utility model belongs to the technical field of centrifugal fans, in particular to a low-noise centrifugal fan structure, which comprises a shell and a plurality of fan blades, an inner cavity is formed in the shell to accommodate all fan blades, the shell is provided with an air inlet facing the inner cavity, and a tangential air outlet, a noise elimination device is arranged at one side of the shell close to the air outlet, the noise elimination device is of a structure with two open ends, an air outlet channel which transversely penetrates through the noise eliminator is arranged in the noise eliminator, the air outlet channel is communicated with the air outlet, acoustic boards are arranged on the inner side walls around the noise eliminator, noise elimination equipment is close to one side of air outlet and is provided with fore-and-aft micropore layer of overfiring, has overcome prior art not enough, carries out multistage inhaling the sound and falls the noise, reduces the noise of fan effectively, reaches the high rotational speed low noise of fan, promotes the performance of product.
Description
Technical Field
The utility model belongs to the technical field of centrifugal fan, concretely relates to low noise centrifugal fan structure.
Background
In recent years, due to rapid development of electronic and information industries, related products are increasingly sophisticated. In view of the present personal computer field, in addition to seeking the cooperation of a computing unit with higher speed and computing capability and various peripheral devices to satisfy the user's requirements, it is also a key field of the development of the industry to aim at light and thin portable electronic devices.
In order to increase the computing speed of a processor, most of the conventional electronic products, such as a notebook computer, a tablet computer, an all-in-one computer, and other electronic devices, use a fan in combination with heat dissipation fins to provide active heat dissipation.
The rotational speed of fan is directly proportional rather than the noise that sends among the prior art, and the noise that the rotational speed was too big caused is big, influences user's use and experiences, and its radiating effect is poor for the rotational speed is little, has restricted computer equipment's operating performance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low noise centrifugal fan structure has overcome the not enough of prior art, carries out the multistage sound of inhaling and falls the noise, reduces the noise of fan effectively, reaches the high rotational speed low noise of fan, promotes the performance of product.
In order to solve the above problems, the utility model adopts the following technical proposal:
the utility model provides a low noise centrifugal fan structure, includes shell and a plurality of flabellum, the shell is inside to be formed with an inner chamber with the all flabellum of holding, the shell has an air intake towards the inner chamber to and a tangential air outlet, the shell is close to one side of air outlet and installs noise elimination device, noise elimination device is both ends open-ended structure, and its inside air-out passageway that transversely runs through that is provided with, air-out passageway and air outlet intercommunication, noise elimination device all is provided with the abatvoix on the inside wall all around, one side that noise elimination device is close to the air outlet is provided with fore-and-aft micropore layer of crossing wind.
Furthermore, the cross section of the noise elimination device is in a trapezoidal structure, and the long edge of the noise elimination device is positioned at one end far away from the shell.
Furthermore, the micropore air passing layer is made of a plurality of porous air permeable materials distributed in a strip shape.
Further, the inner chamber surface of shell is provided with a plurality of slots along circumference interval, and is adjacent be provided with between the slot and inhale the sound piece, inhale the sound piece and set firmly on the inner chamber surface of shell.
Furthermore, one side of the shell, which is close to the air inlet, is provided with a support rib, and one end of the support rib, which is far away from the fan blades, is provided with a motor for driving the fan blades to rotate axially.
Furthermore, the fan blades are arranged in an arc-shaped structure, and the bending direction of the fan blades is opposite to the rotating direction of the fan blades.
Furthermore, the outside of shell sets firmly the fixed block, it has the fixed orifices that is used for the installation to run through on the fixed block.
Compared with the prior art, the utility model, following beneficial effect has:
a low noise centrifugal fan structure, simple structure, the modern design carries out multistage sound absorption and falls and make an uproar through noise elimination device, slot, the setting of inhaling sound piece and flabellum, reduces the noise of fan effectively, reaches the high rotational speed low noise of fan, promotes the performance of product.
Drawings
Fig. 1 is a schematic structural diagram of a low-noise centrifugal fan structure.
Fig. 2 is a schematic structural diagram of a casing in a low noise centrifugal fan structure.
Fig. 3 is a schematic structural diagram of a noise elimination device in a low-noise centrifugal fan structure.
In the figure: 1. a housing; 2. an air inlet; 3. supporting ribs; 4. a fan blade; 5. a fixed block; 6. a noise eliminating device; 7. an air outlet channel; 8. a trench; 9. a sound absorbing block; 10. a sound-absorbing panel; 11. micropore overfire air layer.
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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-3, a low noise centrifugal fan structure, including shell 1 and a plurality of flabellum 4, shell 1 is inside to be formed with an inner chamber with the all flabellum 4 of holding, shell 1 has an air intake 2 towards the inner chamber, and a tangential air outlet, shell 1 is close to one side of air outlet and installs noise elimination device 6, noise elimination device 6 is both ends open-ended structure, its inside air-out passageway 7 that transversely runs through that is provided with, air-out passageway 7 and air outlet intercommunication, all be provided with abatvoix 10 on noise elimination device 6's the inside wall all around, one side that noise elimination device 6 is close to the air outlet is provided with fore-and-aft micropore layer of ventilating 11.
When the fan blade type noise reduction device is used, the fan blade 4 sends the air flow of the air inlet 2 to the air outlet in the rotating process, the air flow is sent to the air outlet channel 7 of the noise elimination device 6 through the air outlet, the resistance of the microporous material is utilized to absorb and reduce noise when the air flow passes through the microporous air passing layer 11, then the noise is further reduced through the sound absorption plate 10, and the noise of the air flow passing through the air outlet channel 7 is reduced.
In order to increase the air output, the cross section of the noise elimination device 6 is in a trapezoidal structure, and the long edge of the noise elimination device is positioned at one end far away from the shell 1.
The microporous air-passing layer 11 is made of a plurality of porous air-permeable materials distributed in a strip shape.
In order to eliminate airflow noise, a plurality of grooves 8 are arranged on the surface of the inner cavity of the shell 1 at intervals along the circumferential direction, sound absorption blocks 9 are arranged between adjacent grooves 8, and the sound absorption blocks 9 are fixedly arranged on the surface of the inner cavity of the shell 1; when the fan blade 4 rotates, the gap vortex generated by the fan blade 4 part can be counteracted with the vortex generated in the groove 8, and the arrangement of the sound absorption block 9 further reduces the vortex effect.
In order to enhance the strength of the shell 1, a support rib 3 is arranged on one side of the shell 1 close to the air inlet 2, and a motor for driving the fan blade 4 to axially rotate is arranged at one end of the support rib 3 far away from the fan blade 4; when the motor drives the fan blades 4 to rotate, the support ribs 3 can reduce interference of air flow sent from the air inlet to the air outlet, and can effectively reduce air-cut noise.
In order to reduce noise, the fan blades 4 are arranged in an arc structure, and the bending direction of the fan blades 4 is opposite to the rotating direction thereof; the fan blade 4 effectively reduces the wind pressure in the rotation process, so that the resistance of the wind flowing in the wind channel is reduced.
For the installation of convenience, the outside of shell 1 has set firmly fixed block 5, runs through on the fixed block 5 to have the fixed orifices that is used for the installation, and the fixed orifices sets up to the screw hole, through the position of bolt fastening shell 1.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The utility model provides a low noise centrifugal fan structure, includes shell (1) and a plurality of flabellum (4), shell (1) inside is formed with an inner chamber with all flabellum (4) of holding, its characterized in that: shell (1) has one air intake (2) towards the inner chamber to and a tangential air outlet, noise abatement device (6) are installed to one side that shell (1) is close to the air outlet, noise abatement device (6) are both ends open-ended structure, and its inside air-out passageway (7) that transversely runs through that is provided with, air-out passageway (7) and air outlet intercommunication, all be provided with abatvoix (10) on the inside wall all around of noise abatement device (6), one side that noise abatement device (6) are close to the air outlet is provided with fore-and-aft micropore layer of ventilating (11).
2. A low noise centrifugal fan structure according to claim 1, wherein: the cross section of the noise elimination device (6) is of a trapezoidal structure, and the long edge of the noise elimination device is located at one end far away from the shell (1).
3. A low noise centrifugal fan structure according to claim 1, wherein: the microporous air passing layer (11) is made of a plurality of porous air permeable materials distributed in a strip shape.
4. A low noise centrifugal fan structure according to claim 1, wherein: the inner cavity surface of shell (1) is provided with a plurality of slots (8) along circumference interval, and is adjacent be provided with sound absorption piece (9) between slot (8), sound absorption piece (9) set firmly on the inner cavity surface of shell (1).
5. A low noise centrifugal fan structure according to claim 1, wherein: one side that shell (1) is close to air intake (2) is provided with brace rod (3), drive flabellum (4) axial pivoted motor is installed to the one end that flabellum (4) were kept away from in brace rod (3).
6. A low noise centrifugal fan structure according to claim 1 or 5, wherein: the fan blades (4) are arranged to be arc-shaped structures, and the bending direction of the fan blades (4) is opposite to the rotating direction of the fan blades.
7. A low noise centrifugal fan structure according to any one of claims 1 to 5, wherein: the outer side of the shell (1) is fixedly provided with a fixing block (5), and a fixing hole for installation penetrates through the fixing block (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021244100.6U CN212563698U (en) | 2020-06-30 | 2020-06-30 | Low-noise centrifugal fan structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021244100.6U CN212563698U (en) | 2020-06-30 | 2020-06-30 | Low-noise centrifugal fan structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212563698U true CN212563698U (en) | 2021-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021244100.6U Active CN212563698U (en) | 2020-06-30 | 2020-06-30 | Low-noise centrifugal fan structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212563698U (en) |
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2020
- 2020-06-30 CN CN202021244100.6U patent/CN212563698U/en active Active
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