CN211715372U - Low-noise fan structure and fan with same - Google Patents
Low-noise fan structure and fan with same Download PDFInfo
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- CN211715372U CN211715372U CN202020166196.2U CN202020166196U CN211715372U CN 211715372 U CN211715372 U CN 211715372U CN 202020166196 U CN202020166196 U CN 202020166196U CN 211715372 U CN211715372 U CN 211715372U
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Abstract
The utility model discloses a low noise fan structure, including a plurality of flabellums and wheel hub, a plurality of flabellums are evenly arranged on wheel hub, and in the side of induced drafting of fan, the middle part of every flabellum is provided with a plurality of curved water conservancy diversion pieces, and the root at rear portion edge is provided with a plurality of recesses. Correspondingly, the utility model also discloses a fan that has above-mentioned structure. The utility model provides high fan pneumatic performance and noise performance make the fan amount of wind increase and reduce the noise.
Description
Technical Field
The utility model relates to a fan technical field, in particular to low noise fan structure and have fan of this structure.
Background
The fan noise is noise generated when the fan works. The "eccentricity" of the fan blades is a major cause of loud noise. The center of gravity of the fan blades of the high-quality fan is on the axis, the fan is very stable in operation and low in noise, the poor-quality fan often has certain deviation, the center of gravity of the fan blades deviates from the axis to cause eccentricity, the poor-quality fan is equivalent to an oscillator (the oscillator is an eccentric wheel added on a motor shaft) after the fan rotates, and as the service life of the fan is prolonged, a fan bearing is gradually worn, or radiating fins of the fan are not firmly installed and are loosened, the vibration aggravates and the noise is increased.
The noise of the fan is the noise generated when the fan works, and is influenced by various factors, and the measurement unit is decibel (dB). When the noise of the fan is measured, the measurement is carried out in a silencing room with the noise less than 17dB, the measurement is carried out in a mode of A weighting, wherein the distance is one meter from the fan, and the measurement is aligned to an air inlet of the fan along the direction of a rotating shaft of the fan.
The spectral characteristics of fan noise are also important, so that a frequency spectrograph is also required to record the noise frequency distribution of the fan, and the noise of the fan is generally required to be as small as possible and no abnormal sound exists.
The electric fan sold in the market at present has unreasonable blade design and high noise, and is particularly obvious when the electric fan rotates at high speed, and the vibration generated during rotation has great influence on the service life of the electric fan.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low noise fan structure and have fan of this structure to solve the great problem of noise that current fan exists.
In order to solve the technical problem, the utility model discloses a technical scheme does:
a low-noise fan structure comprises fan blades and a hub, wherein the fan blades are uniformly arranged on the hub, the front edges of the fan blades are air cutting parts, the middle parts of the fan blades are transition parts, and the rear edges of the fan blades are rectifying parts; the transition part is provided with a plurality of curve type flow deflectors; the root of rectification portion is provided with a plurality of recesses.
Preferably, the curved guide vane is an arc-shaped arch plate with the front end inclined towards the hub, and the radian of the front end of the arc-shaped arch plate is smaller than that of the rear end.
Preferably, the curved guide vane and the fan blade are integrally formed by injection molding.
Preferably, the number of the curved guide vanes on each fan blade is 4, and the number of the fan blades is 8.
Preferably, the thickness of the curved guide vane is 4 mm.
Preferably, the groove is of a circular arc structure.
Preferably, the fan blades are circumferentially provided with a wind protection ring.
The utility model also provides a fan, including above arbitrary fan structure.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model improves the pneumatic performance and the noise performance of the fan by adding the curved flow deflector on the fan blade, so that the air quantity of the fan is increased and the noise is reduced; simultaneously the utility model discloses still set up the recess in the position that rectification portion is close to the flabellum root, the recess makes the fan air current field change, will be relatively fixed fan noise frequency originally, and in the dispersion to the wider frequency spectrum section, the energy that the fan dominant frequency carried then is further weakened.
Drawings
Fig. 1 is a schematic view of an air exhaust side of a low noise fan structure according to the present invention;
fig. 2 is an enlarged schematic view of a local structure of a fan blade according to an embodiment of the present invention.
In the drawings, 1-hub; 2-fan blades; 3-protecting the wind ring; 4-curved guide vanes; 21-groove.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
Referring to fig. 1 and 2, a low noise fan structure includes a plurality of fan blades 2 and a hub 1, the plurality of fan blades 2 are uniformly arranged on the hub 1 and located on the air suction side of the fan, the middle portion of each fan blade 2 is provided with a plurality of curved guide vanes 4, and the root of the rear edge is provided with a plurality of grooves 21.
The utility model discloses low noise fan structure's characteristics lie in, and the middle part and the rear portion of flabellum 2 are for the direction of rotation of flabellum, and curved water conservancy diversion piece 4 and recess 21 all are located the side of induced drafting of fan. The curve type flow deflector 4 can improve the aerodynamic performance and the noise performance of the fan, increase the air quantity of the fan and reduce the noise. The grooves 21 can change the fan airflow field, so that the originally relatively fixed fan noise frequency is dispersed into a wider frequency spectrum section, and the energy carried by the main frequency of the fan is further weakened, thereby reducing the fan noise.
Preferably, the curved guide vane 4 is an arc-shaped arch with the front end inclined towards the hub 1, and the front end radian of the arc-shaped arch is smaller than the rear end radian. In the design, when the fan blade 2 runs, the airflow near the air exhaust side surface of the fan blade 2 generates a stable radial high-pressure airflow at the blade tip of the air exhaust side of the fan blade 2 under the action of the curve guide vane, and the high-pressure airflow prevents the backflow phenomenon of the airflow from the air exhaust side to the air suction side, so that the air exhaust amount of the fan is increased.
Preferably, the curved guide vane 4 and the fan blade 2 are integrally formed by injection molding. In the design, the curved guide vane 4 and the fan blade 2 are made of the same material.
Preferably, the number of the curved guide vanes 4 on each fan blade 2 is 4, and the number of the fan blades 2 is 8. In the design, when the number of the fan blades 2 is 8, the selection of the appropriate number of the curved guide vanes 4 is beneficial to improving the aerodynamic performance and the noise performance of the fan. When the number of the curve type guide vanes 4 added on each fan blade 2 is 4, the air volume of the fan reaches the maximum and the noise value is the lowest.
Preferably, the thickness of the curved guide vane 4 is 4 mm. In this design, when the thickness of the curved guide vane 4 is 4mm, the fan noise level is the lowest.
Preferably, the groove 21 has a circular arc structure. In this design, curved recess 21 is used for the vortex, and for traditional smooth blade, curved recess 21 can produce the torrent, makes the fan air flow field change, will be relatively fixed fan noise frequency originally, disperses to in the more wide frequency spectrum section, and the energy that the fan owner frequency carried is then further weakened to by a wide margin reduction fan's operating noise.
Preferably, a wind-protecting ring 3 is installed on the circumferential direction of the fan blade 2. In the design, the air protection ring 3 collects air quantity and guides the air quantity, so that the air exhaust quantity of the fan is improved.
Example 2
A fan comprising the fan structure described in embodiment 1.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (8)
1. The utility model provides a low noise fan structure, includes a plurality of flabellums and wheel hub, a plurality of flabellums are evenly arranged on the wheel hub, its characterized in that: on the air suction side of the fan, the middle part of each fan blade is provided with a plurality of curve type guide vanes, and the root part of the edge of the rear part is provided with a plurality of grooves.
2. A low noise fan structure according to claim 1, wherein: the curved guide vanes are arc-shaped arch plates with the front ends inclined towards the hub, and the front-end radian of each arc-shaped arch plate is smaller than the rear-end radian of each arc-shaped arch plate.
3. A low noise fan structure according to claim 2, wherein: the curved guide vane and the fan blade are integrally formed by injection molding.
4. A low noise fan structure according to claim 2, wherein: the number of the curved guide vanes on each fan blade is 4, and the number of the fan blades is 8.
5. A low noise fan structure according to claim 2, wherein: the thickness of the curved guide vane is 4 mm.
6. A low noise fan structure according to claim 1, wherein: the groove is of an arc-shaped structure.
7. A low noise fan structure according to claim 1, wherein: and the circumferential direction of the fan blades is provided with a wind protection ring.
8. A fan, characterized by: comprising a fan structure according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020166196.2U CN211715372U (en) | 2020-02-13 | 2020-02-13 | Low-noise fan structure and fan with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020166196.2U CN211715372U (en) | 2020-02-13 | 2020-02-13 | Low-noise fan structure and fan with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211715372U true CN211715372U (en) | 2020-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020166196.2U Active CN211715372U (en) | 2020-02-13 | 2020-02-13 | Low-noise fan structure and fan with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211715372U (en) |
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2020
- 2020-02-13 CN CN202020166196.2U patent/CN211715372U/en active Active
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