CN219654950U - Backward centrifugal fan with noise reduction function - Google Patents
Backward centrifugal fan with noise reduction function Download PDFInfo
- Publication number
- CN219654950U CN219654950U CN202320891794.XU CN202320891794U CN219654950U CN 219654950 U CN219654950 U CN 219654950U CN 202320891794 U CN202320891794 U CN 202320891794U CN 219654950 U CN219654950 U CN 219654950U
- Authority
- CN
- China
- Prior art keywords
- wheel
- wheel disc
- wheel cover
- centrifugal fan
- noise reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000009467 reduction Effects 0.000 title claims abstract description 10
- 230000009471 action Effects 0.000 description 2
- 210000004243 sweat Anatomy 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model discloses a backward centrifugal fan with a noise reduction function, which comprises a wheel disc and a wheel cover, wherein a plurality of blades are uniformly arranged between the wheel disc and the wheel cover, the tail edges of the blades are provided with saw teeth, the blades are of a backward three-way structure, a motor is arranged at the center of the wheel disc, and the diameters of outlets of the wheel cover are distributed at unequal intervals along the circumferential direction. The utility model designs a novel wheel cover and a wheel disc, the wheel cover and the wheel disc are designed by adopting a quadratic curve, the wheel cover and the wheel disc are obtained by a circumferential array, and the outlet diameters of the wheel cover and the wheel disc are distributed at unequal intervals along the circumferential direction. The blade trailing edge is designed with saw teeth, so that noise can be further reduced.
Description
Technical Field
The utility model belongs to the technical field of centrifugal fans, and particularly relates to a backward centrifugal fan with a noise reduction function.
Background
For a backward centrifugal fan, after the air flow enters the wind wheel from the axial direction, the air flow needs to turn 90 degrees and flow out from the wind wheel in the radial direction, and in the process, the air flow is easy to separate in the area close to the tail edge of the blades of the wheel cover and the wheel disc due to the combined action of the inertia force of the air flow and the wheel cover, the blades and the wheel disc of the impeller, so that vortex noise is increased.
Therefore, the utility model provides the noise reduction impeller, and vortex noise of the impeller is reduced through the comprehensive actions of the wheel cover, the wheel disc and the blades.
Disclosure of Invention
The utility model aims to provide a backward centrifugal fan with a noise reduction function so as to solve the problems in the background art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a backward centrifugal fan with function of making an uproar is fallen, includes rim plate and wheel cap, evenly be provided with a plurality of blades between rim plate and the wheel cap, the trailing edge of blade is provided with the sawtooth, just the blade is the ternary structure that sweats, the central point of rim plate puts and is provided with the motor, the exit diameter of wheel cap is the unequally distributed along circumference.
Preferably, the saw teeth are located at a position close to the blade height of 1/2-1/3.
Preferably, the outlet position of the wheel cover is turned upwards by adopting an included angle between the flowing direction of the flow channel and the inlet direction.
Preferably, the outlet position of the wheel disc is turned downwards along the included angle between the flow direction of the flow channel and the inlet direction.
Preferably, the outlet of the wheel disc and the outlet of the wheel cover correspond to a channel containing one blade, and the secondary curve structure is adopted and obtained through a circumferential array.
Compared with the prior art, the utility model has the beneficial effects that: the utility model designs a novel wheel cover and a wheel disc, the wheel cover and the wheel disc are designed by adopting a quadratic curve, the wheel cover and the wheel disc are obtained by a circumferential array, and the outlet diameters of the wheel cover and the wheel disc are distributed at unequal intervals along the circumferential direction. The blade trailing edge is designed with saw teeth, so that noise can be further reduced.
Drawings
Fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is a schematic elevational cross-sectional view of the present utility model.
Fig. 3 is a schematic view of the wheel cover structure of the present utility model.
Fig. 4 is a schematic diagram of a wheel disc structure according to the present utility model.
Fig. 5 is a schematic view of a blade structure according to the present utility model.
1. The motor comprises a wheel disc, 2, blades, 3, a wheel cover, 4, a motor and 5, saw teeth.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 5, the present utility model provides a technical solution: the utility model provides a backward centrifugal fan with function of making an uproar is fallen, includes rim plate 1 and wheel cap 3, evenly is provided with a plurality of blades 2 between rim plate 1 and the wheel cap 3, and the trailing edge of blade 2 is provided with sawtooth 5, and blade 2 is the ternary structure that sweats, and the central point of rim plate 1 puts and is provided with motor 4, and the exit diameter of wheel cap 3 is the unequally distributed along circumference.
In this embodiment, the saw teeth 5 are preferably located at a position close to the height 1/2 to 1/3 of the blade 2; in this embodiment, preferably, the outlet position of the wheel cover 3 is turned upwards by adopting an included angle between the flow direction and the inlet direction along the flow channel; in this embodiment, preferably, the outlet position of the wheel disc 1 is turned down by adopting an included angle between the flow direction and the inlet direction along the flow channel; in this embodiment, preferably, the outlet of the wheel disc 1 and the outlet of the wheel cover 3 correspond to the channel containing one blade 2, and a quadratic curve structure is adopted and obtained through a circumferential array, so that after the airflow comes out along the wheel cover 3 and the wheel disc 1, the airflow interacts with different outlet edge positions of the wheel cover 3 and the wheel disc 1, the generated vibration frequencies are different, and vibration superposition caused by similar frequencies under the same diameter is avoided, thereby reducing vortex noise; the blade 2 trailing edge is designed with serrations 5 to further reduce noise.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a backward centrifugal fan with function of making an uproar is fallen, includes rim plate (1) and wheel cap (3), its characterized in that: a plurality of blades (2) are uniformly arranged between the wheel disc (1) and the wheel cover (3), saw teeth (5) are arranged at the tail edges of the blades (2), the blades (2) are of a sweepback ternary structure, a motor (4) is arranged at the central position of the wheel disc (1), and the diameters of outlets of the wheel cover (3) are distributed at unequal intervals along the circumferential direction.
2. The backward centrifugal fan with noise reduction function according to claim 1, wherein: the saw teeth (5) are positioned at the positions close to the height 1/2-1/3 of the blade (2).
3. The backward centrifugal fan with noise reduction function according to claim 1, wherein: the outlet of the wheel cover (3) is turned upwards along the included angle between the flowing direction of the flow channel and the inlet direction.
4. The backward centrifugal fan with noise reduction function according to claim 1, wherein: the outlet position of the wheel disc (1) is downwards turned by adopting an included angle between the flowing direction and the inlet direction along the flow channel.
5. The backward centrifugal fan with noise reduction function according to claim 1, wherein: the outlet of the wheel disc (1) and the outlet of the wheel cover (3) correspond to a channel comprising one blade (2), and the two-dimensional structure is adopted and obtained through a circumferential array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320891794.XU CN219654950U (en) | 2023-04-20 | 2023-04-20 | Backward centrifugal fan with noise reduction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320891794.XU CN219654950U (en) | 2023-04-20 | 2023-04-20 | Backward centrifugal fan with noise reduction function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219654950U true CN219654950U (en) | 2023-09-08 |
Family
ID=87862010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320891794.XU Active CN219654950U (en) | 2023-04-20 | 2023-04-20 | Backward centrifugal fan with noise reduction function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219654950U (en) |
-
2023
- 2023-04-20 CN CN202320891794.XU patent/CN219654950U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104364532A (en) | Air blower | |
| CN101265923B (en) | Fan and its fan frame | |
| CN109578328B (en) | Centrifugal wind wheel and low-noise backward centrifugal fan comprising same | |
| CN113175443B (en) | Efficient low-noise three-dimensional flow impeller of backward centrifugal fan without volute | |
| CN212003716U (en) | Impeller of centrifugal fan and range hood with same | |
| CN219654950U (en) | Backward centrifugal fan with noise reduction function | |
| CN209925295U (en) | Fin-shaped bionic noise-reduction centrifugal fan | |
| CN210568923U (en) | Novel air purifier | |
| CN102758793B (en) | Fan blade and axial flow fan with fan blade of air conditioner | |
| CN112628165B (en) | Fan and fan impeller thereof | |
| CN203453115U (en) | Backward centrifugal wind wheel | |
| CN213953930U (en) | Noise-reduction axial flow fan | |
| CN112628199B (en) | Centrifugal wind wheel capable of reducing resistance and noise | |
| TW200803710A (en) | Turbine set | |
| CN213450988U (en) | Centrifugal impeller and ventilator thereof | |
| CN210068521U (en) | Axial fan structure of high-efficient low noise | |
| CN108953222B (en) | Centrifugal impeller | |
| CN111810430A (en) | Turbo-charged fan | |
| CN217763776U (en) | Fresh air device, mobile air conditioner, exhaust fan and central air conditioner | |
| CN219754880U (en) | Wind wheel and contain its axial fan | |
| CN219509861U (en) | High-ventilation low-noise centrifugal ventilator | |
| CN217842110U (en) | Impeller and centrifugal fan | |
| CN215719781U (en) | Centrifugal impeller and centrifugal fan | |
| CN112824685B (en) | Centrifugal impeller with efficiency improving device | |
| CN114941636B (en) | Front-mounted supercharging multi-wing centrifugal impeller and centrifugal fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |