CN216518861U - Fan frame with noise reduction structure - Google Patents
Fan frame with noise reduction structure Download PDFInfo
- Publication number
- CN216518861U CN216518861U CN202122688263.4U CN202122688263U CN216518861U CN 216518861 U CN216518861 U CN 216518861U CN 202122688263 U CN202122688263 U CN 202122688263U CN 216518861 U CN216518861 U CN 216518861U
- Authority
- CN
- China
- Prior art keywords
- fan frame
- concave
- noise reducing
- fan
- peripheral wall
- 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
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A fan frame having a noise reducing structure, the fan frame comprising: the bearing seat and the peripheral wall part surround the bearing seat, a middle shaft is formed by upward protrusion of the inner center of the bearing seat, and an assembly space is reserved between the outer periphery of the middle shaft and the peripheral wall part. At least two inclined planes are arranged on the peripheral wall part, the inclined planes incline to the assembling space, and at least two concave rotations are arranged on the inclined planes, so that the noise of an audio frequency band generated by the wind flowing through the concave rotations can be inhibited when the fan runs.
Description
Technical Field
The present invention relates to fans, and more particularly, to a fan frame with noise reduction function.
Background
In order to have excellent air cooling heat dissipation capability, a high air volume is required for rapid heat dissipation, and the increase of the fan speed causes high noise. Most of the past radiator manufacturers design fan blades or radiating fins, but the rotating speed and the noise are always at two ends of the balance, so that the two are difficult to be considered. Certainly, there is a passive heat dissipation mechanism that does not install a fan and simply leans on a fin (Fanless), but this part still belongs to a few products, and the heat dissipation efficiency has a certain limit.
In recent years, a silent computer fan has been proposed, which is equipped with an Active Noise Cancellation (ANC) technique. The ANC noise reduction module comprises a controller, a microphone, an induction coil and a magnet. The noise reduction mechanism is designed in the fan, so that the noise source and the noise source are ensured to be in the same direction, and the optimal mute efficiency is achieved. The noise reduction principle is that the controller detects the noise waveform and contacts with another waveform with an opposite phase to cause the two sound ripples to cancel each other, thereby greatly reducing the noise. In the past, the conventional noise reduction mechanism is that anti-phase sources are arranged at two ends of a fan, and the efficiency of counteracting wave patterns is not high; and the new generation ANC noise reduction module enables the wave modes to have the same direction and has better effect. The key point is that a plurality of small magnets are adhered on the fan blades and can generate induction with the coil of the fan outer frame to emit wave type with opposite phase to counteract noise.
Although the new generation ANC noise reduction module will reduce the noise greatly, the overall structure and circuit design is complicated, and the manufacturing cost is certainly more expensive than any high-order air-cooled radiator on the market.
SUMMERY OF THE UTILITY MODEL
Therefore, the main objective of the present invention is to solve the conventional disadvantages, and the present invention utilizes the simplest and simplest noise reduction structure design to be disposed on the fan frame of the fan, so as to suppress the noise of the audio frequency band generated by the wind flowing through the noise reduction structure when the fan is running.
Another objective of the present invention is to provide at least two shunt channels corresponding to the noise reduction structure on the inner wall surface of the peripheral wall portion of the fan frame, wherein the shunt channels can accelerate the fluid to pass through, and the noise reduction material is provided inside or on the inner wall surface of the shunt channels, so as to reduce the noise generated by the fan operation.
Another objective of the present invention is to provide a fan blade assembled in a fan frame, wherein at least two noise reduction structures are disposed on the surfaces of at least two blades on the fan blade, so as to suppress noise in an audio frequency band generated by wind flowing through the noise reduction structures when the fan blade is in operation.
To achieve the above object, the present invention provides a fan frame with a noise reduction structure, comprising: the bearing seat and the peripheral wall part surround the bearing seat, a middle shaft is formed in the inner center of the bearing seat in an upward protruding mode, and an assembling space is reserved between the outer periphery of the middle shaft and the peripheral wall part. At least two inclined planes are arranged on the peripheral wall part, the inclined planes incline to the assembling space, and at least two concave screws are arranged on the inclined planes.
In an embodiment of the present invention, the fan frame has four peripheral wall corners, and the inclined planes are respectively disposed on the peripheral wall corners.
In an embodiment of the present invention, the concave spirals are arranged in a matrix or irregularly, and a guiding inclined plane is arranged at an opening of the concave spirals.
In an embodiment of the present invention, the depth of the concave holes is 0.19 mm to 5.85 mm.
In one embodiment of the present invention, the longitudinal cross-sectional shape of the concave convolutions is semi-circular, U-shaped or spherical.
In an embodiment of the present invention, at least two flow dividing channels are provided on the inner wall surface of the peripheral wall portion below the inclined surfaces, and the flow dividing channels are communicated with the inclined surfaces.
In one embodiment of the present invention, the flow dividing channels are V-shaped channels.
In an embodiment of the present invention, noise reduction materials are disposed inside the concave spirals and the flow dividing channels or the inner wall surface.
In an embodiment of the present invention, the noise reduction material is silica gel or foam.
In an embodiment of the present invention, the assembly space is assembled with a fan blade, the fan blade includes a hub and at least two blades extending outward from the hub in a radial direction, the hub is provided with an axis, and the axis penetrates and is assembled in the central axis; in addition, the surface of the blade is provided with at least two concave spirals which are arranged in a matrix or in an irregular way.
Drawings
The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular description of preferred embodiments of the utility model, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the utility model.
FIG. 1 is a fan frame of the fan according to the first embodiment of the present invention
FIG. 2 is a schematic top view of FIG. 1
FIG. 3 is an enlarged partial schematic view of FIG. 1;
FIG. 4 is a partial cross-sectional side view of FIG. 1;
FIG. 5 is a schematic exterior view of a fan according to a second embodiment of the present invention;
FIG. 6 is a side cross-sectional view of the fan of FIG. 5;
fig. 7 is a partial cross-sectional view of a fan frame according to a third embodiment of the present invention.
Reference numerals:
Wheel hub 21
Concave rotary screw 23
Detailed Description
In the description, numerous specific details are provided to provide a thorough understanding of embodiments of the utility model; one skilled in the art will recognize, however, that the utility model can be practiced without one or more of the specific details; in other instances, well-known details are not shown or described to avoid obscuring aspects of the utility model. The technical contents and detailed description of the present invention are described below with reference to the drawings:
the technical contents and the detailed description of the present invention are described below with reference to the accompanying drawings:
referring to fig. 1-4, an appearance of a fan frame of a fan according to a first embodiment of the present invention is schematically illustrated in a top view, a partially enlarged view, and a partially cross-sectional side view of fig. 1. As shown in the figure: the utility model relates to a fan frame with a noise reduction structure, wherein the fan frame 1 comprises: a carrying seat 11 and a peripheral wall 12 enclosing the carrying seat 11, a central shaft 13 is formed protruding upward at the inner center of the carrying seat 11, an assembly space 14 is left between the outer periphery of the central shaft 13 and the peripheral wall 12, and the assembly space 14 is used for assembling a coil assembly (not shown) and a fan blade (not shown).
In addition, four peripheral corners 15 of the peripheral wall 12 are respectively provided with an inclined plane 16, the inclined plane 16 is inclined toward the assembly space 14, the inclined plane 16 is provided with at least two concave screws 17 arranged in a matrix or irregular manner, an opening of each concave screw 17 is provided with a guiding inclined plane 171, and the concave screws 17 are respectively provided with hole depths with different depths, and the depth of each hole is 0.19 mm-5.85 mm. The design of the matrix arrangement of these concave convolutions 17 can suppress the frequency band of the audio frequency generated by the wind flow, as is the phenomenon of Helmholtz resonance (Helmholtz resonance), which refers to the phenomenon of resonance of air in a cavity, such as the resonance caused by blowing air at the mouth of an empty bottle. In the present drawing, the longitudinal cross-sectional shape of the concave spiral 17 is a semicircle, a U-shape, or a sphere.
At least two branch passages 19 are provided on the inner wall surface 18 of the peripheral wall portion 12 at positions corresponding to the lower portions of the inclined surfaces 16, and the branch passages 19 communicate with the inclined surfaces 16. These diversion channels 19 can accelerate the passage of fluid as the wind flows. In the present illustration, the flow-splitting channel is a V-shaped channel.
Noise reducing materials (not shown, described later) are provided inside or on the inner wall surface of the flow dividing passages 19 to suppress high-frequency sound generated by the flow of the intake air.
When the fan blades are installed in the assembly space 14 of the present invention, the fan blades are driven to rotate, so as to drive the wind to flow, the wind passing through the diversion channels 19 can accelerate the fluid to pass through, and when the wind passing through the concave swirls 17, the matrix arrangement design of the concave swirls 17 can restrain the audio frequency band generated by the wind flowing through, so as to reduce the noise.
For better understanding of the present invention, the fan frame with the concave-rotation design of the present invention will be compared with the test data of the conventional fan frame without the concave-rotation design as follows:
after comparing the fan frame 1 of the present invention with the conventional fan frame, it can be known that the noise of the fan frame 1 of the present invention can be reduced by 1dB, the flow rate can be reduced by 2%, and the pressure can be increased by 8%.
Referring to fig. 5 and 6, an appearance of a fan according to a second embodiment of the present invention and a side sectional view of the fan in fig. 5 are shown. As shown in the figure: the present embodiment is substantially the same as the first embodiment, except that a fan blade 2 is assembled in the assembly space 14, the fan blade 2 includes a hub 21 and at least two blades 22 extending radially outward from the hub 21, the hub 21 is provided with an axis (not shown), and the axis penetrates and is assembled in the central shaft 13. In addition, the surface of the vane 22 has at least two concave-spiral 23 designs arranged in a matrix or irregular arrangement, which are the same as the first embodiment.
Therefore, when the fan blade 2 is driven to rotate, in addition to the concave swirls 17 of the fan frame 1, the concave swirls 23 on the surfaces of the blades 22 of the fan blade 2 can also inhibit the frequency band generated by the wind flow, so that the whole fan has a dual noise reduction design, and the noise generated by the fan motion can be greatly reduced.
Referring to fig. 7, a fan frame according to a third embodiment of the utility model is partially shown in cross-sectional view. As shown in the figure: the present embodiment is substantially the same as the first embodiment, except that the noise reducing material 3 is filled in or disposed on the inner wall surface of the concave turns 17 and the flow dividing channels 19, and when the fan blades (not shown) are driven to rotate, the noise reducing material 3 can absorb the noise generated when the fan is running. In the figure, the noise reduction material 3 is silica gel or foam.
However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited by the above description, and all equivalent variations and modifications made by the claims of the present invention should also be covered by the protection scope of the present invention. The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. A fan frame having a noise reducing structure, the fan frame comprising:
the bearing seat and the peripheral wall part surround the bearing seat, a middle shaft is formed by upward protrusion at the inner center of the bearing seat, and an assembly space is reserved between the outer periphery of the middle shaft and the peripheral wall part;
wherein, at least two inclined planes are arranged on the peripheral wall part, the inclined planes incline towards the assembling space, and at least two concave screws are arranged on the inclined planes.
2. The fan frame with a noise reduction structure as claimed in claim 1, wherein the fan frame has four peripheral wall corners, and the inclined surfaces are respectively provided on the peripheral wall corners.
3. A fan frame with noise reducing structure as claimed in claim 1, wherein the concave spirals are arranged in a matrix or irregularly, and a guiding slope is provided at the opening of the concave spirals.
4. The fan frame with a noise reducing structure according to claim 1, wherein the depth of the concave hole depth is 0.19 mm to 5.85 mm.
5. A fan frame with a noise reducing structure as set forth in claim 1, wherein said concave-spiral longitudinal sectional shape is a semicircle, a U-shape or a sphere.
6. A fan frame with a noise reducing structure according to claim 1, wherein an inner wall surface of the peripheral wall portion below the inclined surface is provided with at least two flow dividing passages, and the flow dividing passages communicate with the inclined surface.
7. The fan frame with a noise reducing structure of claim 6, wherein the flow dividing channel is a V-shaped channel.
8. A fan frame with a noise reducing structure as claimed in claim 6, wherein the concave portion and the inner portion of the flow dividing passage or the inner wall surface are provided with noise reducing material.
9. A fan frame with a noise reducing structure as claimed in claim 8, wherein the noise reducing material is silica gel or foam.
10. A fan frame with noise reducing structure as claimed in claim 1, wherein the assembling space is assembled with a fan blade, the fan blade includes a hub and at least two blades extending radially outward from the hub, the hub is provided with an axle, and the axle is inserted into the central axle; in addition, the surface of the blade is provided with at least two concave spirals which are arranged in a matrix or in an irregular way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122688263.4U CN216518861U (en) | 2021-11-04 | 2021-11-04 | Fan frame with noise reduction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122688263.4U CN216518861U (en) | 2021-11-04 | 2021-11-04 | Fan frame with noise reduction structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216518861U true CN216518861U (en) | 2022-05-13 |
Family
ID=81526956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122688263.4U Active CN216518861U (en) | 2021-11-04 | 2021-11-04 | Fan frame with noise reduction structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216518861U (en) |
-
2021
- 2021-11-04 CN CN202122688263.4U patent/CN216518861U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4627409B2 (en) | Axial fan | |
| US7192258B2 (en) | Axial flow type cooling fan with shrouded blades | |
| US8961124B2 (en) | Axial fan | |
| CN106337824B (en) | A kind of volute casing centrifugal blower fan of novel belt permanent magnetic brushless system | |
| EP3020976B1 (en) | Computer fan with noise reducing structured casing wall opposite to the blade tips | |
| US9523375B2 (en) | Fan blade structure and centrifugal fan using the same | |
| US7364411B2 (en) | Fan impeller and fan motor | |
| US8550781B2 (en) | Heat dissipation fan and rotor thereof | |
| JP2013113128A (en) | Axial flow fan | |
| TWI405533B (en) | Heat dissipater having stacking fans and display device using the same | |
| TW201344062A (en) | Axial flow fan | |
| US7217087B2 (en) | Centrifugal fan | |
| CN216518861U (en) | Fan frame with noise reduction structure | |
| US8029236B2 (en) | Heat dissipation fan | |
| JP5992778B2 (en) | Axial fan | |
| CN211901028U (en) | Computer noise reduction fan | |
| US7192249B2 (en) | Turbulent flow blower | |
| CN208010662U (en) | A kind of air-cooled structure on water pump | |
| US11078915B2 (en) | Contra-rotating fan structure | |
| TWM623731U (en) | Fan frame with noise reduction structure | |
| CN219119505U (en) | Fan wheel and radiator fan | |
| US20240244788A1 (en) | Impeller, fan and electronic device | |
| JP2002021781A (en) | Fan device | |
| TWI681127B (en) | Centrifugal fan and impeller thereof | |
| TWM610534U (en) | Fan and its impeller structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |