CN217582625U - Inner wall ladder noise reduction structure and fan thereof - Google Patents
Inner wall ladder noise reduction structure and fan thereof Download PDFInfo
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- CN217582625U CN217582625U CN202221497616.0U CN202221497616U CN217582625U CN 217582625 U CN217582625 U CN 217582625U CN 202221497616 U CN202221497616 U CN 202221497616U CN 217582625 U CN217582625 U CN 217582625U
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Abstract
The utility model discloses a structure of making an uproar falls in inner wall ladder and fan thereof, a structure of making an uproar falls in inner wall ladder, including the spiral case, the spiral case is equipped with the holding chamber and the air outlet that links up with the holding chamber, and the inside wall of spiral case is equipped with banding stair structure, and this stair structure is arranged along the inside wall axial of spiral case in turn. A fan comprises a motor, a centrifugal impeller and an inner wall stepped noise reduction structure, wherein the motor is arranged on a base, the centrifugal impeller rotates in an accommodating cavity, and the motor is connected with the centrifugal impeller. The utility model provides a structure of making an uproar falls in inner wall ladder and fan thereof changes into the parallel laminar flow of giving vent to anger with the impeller runner and surges the air current, improves the air current and adheres, increases the air output and reduces the turbulent air current, realizes reducing the effect of the noise of fan product.
Description
Technical Field
The utility model belongs to the technical field of centrifugal fan technique and specifically relates to a structure of making an uproar falls in inner wall ladder and fan thereof is related to.
Background
The centrifugal fan accelerates gas by using an impeller rotating at a high speed according to the principle that kinetic energy is converted into potential energy, and then decelerates and changes the flow direction so as to convert the kinetic energy into the potential energy (pressure). In a single stage centrifugal fan, the gas enters the impeller from an axial direction, changes to a radial direction as it flows through the impeller, and then enters the diffuser. Centrifugal fans are often used as blowers, and have the disadvantage of high noise during operation. One of the reasons for the noise is that the airflow at the outlet of the impeller channel suddenly diffuses and causes the gas to be sparse. In actual production operation, the noise of the device greatly influences the production working environment. Therefore, it is necessary to design a fan with low noise.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an inner wall ladder structure of making an uproar and fan thereof falls changes the parallel laminar flow of giving vent to anger with the impeller runner into the air current that surges, improves the air current and adheres, increases the air output and reduces the turbulent air current, realizes reducing the effect of the noise of fan product.
In order to solve the technical problem, the utility model provides a technical scheme is: the inner wall stepped noise reduction structure comprises a volute, wherein the volute is provided with a containing cavity and an air outlet connected with the containing cavity, and the inner side wall of the volute is provided with a strip-shaped step structure which is alternately arranged along the axial direction of the inner side wall of the volute.
The above technical scheme is adopted in the utility model, when centrifugal fan moved, the rotatory air current that drives of impeller was rotatory in the holding chamber and is seen off from the air outlet along the tangential direction of rotatory circumference. Through the setting of banding stair structure, can make rotatory air current change into along the stair structure and surge the air current, reduce the adhesion of air current to the spiral case lateral wall, when the air current flows from air outlet along the lateral wall of stair structure, reduced turbulent air current, realize the effect of noise reduction. In addition, the arrangement of the step structure can improve the air output of the fan.
The inner wall step noise reduction structure is provided with the grooves between the step structures. This recess cooperation stair structure changes the rotatory air current that the impeller drove into the air current that surges, improves the air current and adheres, has solved the problem that the gas that the abrupt diffusion of export air current arouses is sparse and the noise that produces.
Foretell inner wall ladder falls structure of making an uproar, the cross-section of stair structure is the arc, and the bellied cambered surface of this arc extends towards the spiral case inboard direction. The most outer periphery of the spiral airflow has the largest pressure due to the action of centrifugal force, and can generate larger noise when flowing out of the air outlet through direct parallel laminar flow.
Foretell inner wall ladder falls structure of making an uproar, the top of spiral case is equipped with the apron, is equipped with the air intake on the apron.
In the inner wall stepped noise reduction structure, the base is arranged on the bottom surface of the volute and is connected with the bottom surface of the volute through the ribs arranged at intervals. Through alternate rib, can form air inlet channel between the rib, can be used to supplementary air inlet.
The utility model provides another technical scheme is: a fan comprises a motor, a centrifugal impeller and an inner wall stepped noise reduction structure in any one of the technical schemes, wherein the motor is arranged on a base, the centrifugal impeller rotates in an accommodating cavity, and the motor is connected with the centrifugal impeller.
The utility model discloses a fan, when motor drive centrifugal impeller is rotatory, the air intake on the lid board gets into the holding chamber in, through centrifugal impeller's effect, the air current forms the rotatory air current of spiral, when this air current flows through the spiral case inside wall, because the setting of stair structure, outmost rotatory air current is changed into the air current that surges, has reduced air-out atmospheric pressure, reduces turbulent air current when increasing the air output, reaches the purpose that the noise reduction required.
Furthermore, the air inlet on the cover plate is coaxially opposite to the centrifugal impeller. The air inlet and the centrifugal impeller are coaxial, so that the air inlet amount and the air inlet stability are ensured, and the generation of turbulence when the axis deviates is avoided.
The utility model discloses the beneficial effect who gains is: the air outlet pressure of the centrifugal fan during air supply is reduced, airflow adhesion is improved, and the problem that the air flow at the air outlet is diffused suddenly to cause sparse air and generate noise is solved. The impeller-driven air outlet parallel laminar flow is changed into the surging air flow, the pressure of the outmost air flow is reduced, the noise of the air flow when flowing out of the air outlet is effectively reduced, and the working environment when the centrifugal fan is used is improved.
Drawings
Fig. 1 is a schematic structural diagram of an appearance of an inner wall stepped noise reduction structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a volute of an inner wall stepped noise reduction structure according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure diagram of a volute of an inner wall stepped noise reduction structure according to an embodiment of the present invention;
fig. 4 is an external structural schematic diagram of a fan according to an embodiment of the present invention;
fig. 5 is a schematic sectional structure view of a fan according to an embodiment of the present invention.
Description of reference numerals: the centrifugal fan comprises a volute 1, an accommodating cavity 10, an air outlet 11, a step structure 12, a groove 13, a cover plate 14, an air inlet 15, a base 16, ribs 17, a motor 21 and a centrifugal impeller 22.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 3, an inner wall stepped noise reduction structure includes a volute 1, the volute 1 is provided with a receiving cavity 10 and an air outlet 11 connected with the receiving cavity 10, the inner side wall of the volute 1 is provided with a strip-shaped step structure 12, and the step structures 12 are axially and alternately arranged along the inner side wall of the volute 1.
In the present embodiment, a groove 13 is provided between the step structures 12. The cross section of the step structure 12 is arc-shaped, and the convex arc surface of the arc extends towards the inner side of the volute 1.
The top of the volute 1 is provided with a cover plate 14, and the cover plate 14 is provided with an air inlet 15. The bottom surface of the volute 1 is provided with a base 16, and the base 16 is connected with the bottom surface of the volute 1 through ribs 17 arranged at intervals.
As shown in fig. 4 and 5, a fan includes a motor 21, a centrifugal impeller 22, and the inner wall stepped noise reduction structure according to the above embodiment, the motor 21 is disposed on the base 16, the centrifugal impeller 22 rotates in the accommodating chamber 10, and the motor 21 is connected to the centrifugal impeller 22. Wherein, the air inlet 15 on the cover plate 14 is coaxially opposite to the centrifugal impeller 22.
The following is combined with the working principle of the fan of the utility model to explain the utility model further.
When the fan works, the motor 21 drives the centrifugal impeller 22 to rotate, and air enters the accommodating cavity 10 from the air inlet 15 of the cover plate 14. Driven by the centrifugal impeller 22, a spirally rotating air flow is formed. When the airflow spreads outward from the axial direction of the centrifugal impeller 22 to the radial direction of the rotating circumference thereof, the rotating airflow is thrown out from the tangential direction of the centrifugal impeller 22 and finally flows out from the air outlet 11, thereby achieving the purpose of air supply.
The noise generated by the centrifugal fan is due to the high pressure airflow, which rotates at high speed inside the volute 1. Due to the centrifugal force during rotation, the airflow moves towards the air outlet 11 along the inner side wall of the volute 1 under the push of the subsequent airflow. In the motion process, outmost rotatory high-pressure draught's pressure is the biggest, process the utility model discloses a behind the stair structure 12 to and cooperation recess 13, make the air current of former parallel laminar flow receive certain hindrance, turn into the air current that surges, make the atmospheric pressure of outmost air current reduce, improved the adhesion of air current to spiral case 1 inner wall, when this air current was exported from air outlet 11, its atmospheric pressure that gives vent to anger reduced, reduced the production of turbulent flow indiscriminate flow, and then reduced the noise of fan.
In summary, the present invention has been made to practical samples according to the description and the drawings, and after a plurality of use tests, the utility model can be proved to achieve the expected purpose, and the practical value is undoubted. The above-mentioned embodiments are only used to conveniently illustrate the present invention, and are not to the limit of the present invention in any form, and any person who knows commonly in the technical field has, if not in the scope of the technical features of the present invention, utilize the present invention to make the equivalent embodiment of local change or modification, and not to break away from the technical features of the present invention, and all still belong to the technical features of the present invention.
Claims (7)
1. The utility model provides a structure of making an uproar falls in inner wall ladder, includes spiral case (1), its characterized in that: the volute (1) is provided with an accommodating cavity (10) and an air outlet (11) connected with the accommodating cavity (10), the inner side wall of the volute (1) is provided with a strip-shaped step structure (12), and the step structures (12) are alternately arranged along the axial direction of the inner side wall of the volute (1).
2. The inner wall stepped noise reduction structure according to claim 1, wherein: grooves (13) are arranged between the step structures (12).
3. The inner wall stepped noise reduction structure according to claim 2, wherein: the cross section of the step structure (12) is arc-shaped, and the convex arc surface of the arc extends towards the inner side direction of the volute (1).
4. The inner wall stepped noise reduction structure according to claim 1, wherein: the top of the volute (1) is provided with a cover plate (14), and the cover plate (14) is provided with an air inlet (15).
5. The inner wall stepped noise reduction structure according to claim 2, wherein: the bottom surface of the volute (1) is provided with a base (16), and the base (16) is connected with the bottom surface of the volute (1) through ribs (17) arranged at intervals.
6. A fan, its characterized in that: the noise reduction structure comprises a motor (21), a centrifugal impeller (22) and the inner wall stepped noise reduction structure as claimed in any one of claims 1 to 5, wherein the motor (21) is arranged on a base (16), the centrifugal impeller (22) rotates in a containing cavity (10), and the motor (21) is connected with the centrifugal impeller (22).
7. The fan of claim 6, wherein: the air inlet (15) on the cover plate (14) is coaxially opposite to the centrifugal impeller (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221497616.0U CN217582625U (en) | 2022-06-15 | 2022-06-15 | Inner wall ladder noise reduction structure and fan thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221497616.0U CN217582625U (en) | 2022-06-15 | 2022-06-15 | Inner wall ladder noise reduction structure and fan thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217582625U true CN217582625U (en) | 2022-10-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221497616.0U Active CN217582625U (en) | 2022-06-15 | 2022-06-15 | Inner wall ladder noise reduction structure and fan thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217582625U (en) |
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2022
- 2022-06-15 CN CN202221497616.0U patent/CN217582625U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Building 1, No. 10 Chuangxin Road, Jindu Town, Gaoyao District, Zhaoqing City, Guangdong Province, 526100 Patentee after: Guangdong Shenghui Technology Co.,Ltd. Country or region after: China Address before: 526000 No.2 factory building of an village, Yaonan 1st Road, Nan'an District, Gaoyao District, Zhaoqing City, Guangdong Province Patentee before: ZHAOQING SHENGHUI ELECTRONIC TECHNOLOGY Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |