CN219711838U - Ventilation fan with low wind noise - Google Patents
Ventilation fan with low wind noise Download PDFInfo
- Publication number
- CN219711838U CN219711838U CN202321344018.4U CN202321344018U CN219711838U CN 219711838 U CN219711838 U CN 219711838U CN 202321344018 U CN202321344018 U CN 202321344018U CN 219711838 U CN219711838 U CN 219711838U
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- CN
- China
- Prior art keywords
- air inlet
- air
- fan
- panel
- connecting pipe
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- 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.)
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- 238000009423 ventilation Methods 0.000 title description 7
- 239000000872 buffer Substances 0.000 claims abstract description 13
- 241000883990 Flabellum Species 0.000 claims description 2
- 239000002516 radical scavenger Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 241000699670 Mus sp. Species 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
Abstract
The utility model discloses a low-wind-noise ventilator which comprises a wind barrel, wherein fan blades are arranged in the wind barrel, a panel is arranged on the front side of the wind barrel, an air inlet is formed in the panel, the position of the air inlet corresponds to the position of the fan blades, a fan cover part is formed at the air inlet of the panel, an airflow buffer space is formed between the front end of the fan blades and the rear end of the fan cover part, an air inlet connecting pipe is formed at the rear part of the panel, the front end of the air inlet connecting pipe is connected with the edge part of the air inlet into a whole, and the rear end of the air inlet connecting pipe is connected with the front end of the wind barrel. The ventilating fan has small wind noise and high energy efficiency during operation.
Description
Technical Field
The utility model relates to the technical field of ventilation fans, in particular to a low-wind-noise ventilation fan.
Background
At present, the ventilator comprises a wind barrel, wherein the wind barrel is used for being inserted into a wall, axial-flow fan blades are arranged in the wind barrel and are arranged for exhausting air outwards, in order to prevent large sundries from being sucked into the ventilator or mice from entering the ventilator, the front end of the ventilator is provided with a fan cover, the fan cover is provided with strip-shaped holes or mesh structures, and in order to enable the ventilator to be compact in structure, the front ends of the fan blades of the ventilator in the prior art are arranged close to the fan cover; for example, chinese patent publication No. CN208124488U is a ventilation system damper and ventilator provided with the damper: comprises a grid-shaped panel covered on the air inlet, which plays roles of mechanical hazard protection and decoration; when the impeller (namely the fan blades) operates, the impeller firstly tangentially pushes air entering the ventilating fan, then the air is turned into axial flow through the guiding function of the impeller and the guiding function of the air drum, so that when the impeller pushes the air entering the air drum to move tangentially, the air between the front end of the impeller and the rear end of the panel forms a squeezing function, the air quickly impacts the grid-shaped structure of the panel, and the air at the grid-shaped structure position of the panel is caused to generate severe turbulence, so that larger noise is generated, the impeller is arranged close to the panel to be more beneficial, and the ventilating fan in the prior art is necessary to improve.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a ventilation fan which has small wind noise during operation.
The aim of the utility model is achieved by the following technical scheme.
The utility model discloses a low-wind-noise ventilator which comprises a wind barrel, wherein fan blades are arranged in the wind barrel, a panel is arranged on the front side of the wind barrel, an air inlet is formed in the panel, the position of the air inlet corresponds to that of the fan blades, a fan cover part is formed at the air inlet of the panel, and an airflow buffer space is formed between the front ends of the fan blades and the rear ends of the fan cover part.
Preferably, the width of the air flow buffer space in a direction parallel to the axis of the fan blade is set to be greater than 10 mm.
Preferably, the fan cover part comprises air guide strips which are arranged at intervals.
Preferably, the thickness of the air guide plate strip is gradually reduced from back to front.
Preferably, an air inlet connecting pipe is formed at the rear part of the panel, the front end of the air inlet connecting pipe is connected with the edge part of the air inlet integrally, and the rear end of the air inlet connecting pipe is connected with the front end of the air cylinder.
Preferably, an air guiding fillet is formed between the front end of the air inlet connecting pipe and the edge part of the air inlet.
Compared with the prior art, the utility model has the beneficial effects that: through setting up the front end of flabellum and being formed with the air current buffer space between the rear end of fan housing portion, alleviateed the torrent of fan housing portion department to be favorable to reducing the wind noise when scavenger fan operates.
Drawings
Fig. 1 is a schematic perspective view of a ventilation fan according to the present utility model.
Fig. 2 is a schematic cross-sectional view of a ventilator according to the present utility model.
Fig. 3 is a schematic view of a partial structure at a in fig. 2.
Fig. 4 is a schematic front perspective view of the panel of the present utility model.
Fig. 5 is a schematic view of the rear perspective structure of the panel of the present utility model.
Description of the reference numerals: a wind barrel 1; a fan blade 2; a motor assembly 3; a panel 4; a fan cover portion 40; an air inlet 401; a wind-guiding fillet 4011; air deflector strips 41; an air inlet connection pipe 42; an air flow buffer space 5; check valve 6.
Description of the embodiments
The utility model is further described below with reference to the accompanying drawings.
The utility model relates to a low wind noise ventilator, as shown in figures 1 and 2, which comprises a wind barrel 1, wherein a fan blade 2 is arranged in the wind barrel 1, the fan blade 2 belongs to an axial flow type, the fan blade 2 and the wind barrel 1 are coaxially arranged, the wind barrel 1 is also provided with a motor component 3, the motor component 3 drives the fan blade 2 to rotate, the rear end part of the wind barrel 1 is hinged with a check valve 6, the front side of the wind barrel 1 is provided with a panel 4, in practical application, the wind barrel 1 is inserted into a wall, and the panel 4 is arranged at the front side of the wall. As shown in fig. 4, the panel 4 is formed with an air inlet 401, and the position of the air inlet 401 corresponds to that of the fan blade 2, so that when the fan blade 2 operates, air flows into the air duct 1 through the air inlet 401 and is discharged through the check valve 6. As shown in fig. 1, the panel 4 is formed with a fan cover 40 at the air inlet 401, and the fan cover 40 functions to block human hands from extending into the duct 1 to contact with the blades 2, but air flow can pass through the fan cover 40. As shown in fig. 2, an airflow buffer space 5 is formed between the front end of the fan blade 2 and the rear end of the fan housing 40, in other words, the front end of the fan blade 2 and the rear end of the fan housing 40 are not closely disposed, so that when the fan blade 2 rotates, the tangential movement of the blade of the fan blade 2 facing away from the air inlet 401 pushes the air in the air duct 1 in the range of the fan blade 2 in the axial direction from being biased to the tangential movement to being biased to the axial movement, that is, the air is guided by the curved surface of the blade of the fan blade 2 to be biased to the axial movement, so that a negative pressure is formed on the side of the blade of the fan blade 2 facing the air inlet 401, and then the indoor air is sucked into the air inlet 401 from front to back and then into the air duct 1; while a small amount of air pushed tangentially by the front end of the fan blade 2 (which cannot be pushed backward by the fan blade 2) can be buffered in the airflow buffer space 5, it can be understood that the air near the rear side of the panel 2 buffers the kinetic energy of the air near the front end of the fan blade 2, so that the speed of the air pushed tangentially by the front end of the fan blade 2 to reach the fan cover 40 is greatly reduced, thereby reducing the turbulence at the fan cover 40 and being beneficial to reducing the wind noise when the ventilator operates.
Further, the width of the air flow buffer space 5 in the direction parallel to the axis of the fan blade 2 (that is, the dimension "D" in fig. 2) is set to be more than 10 mm; when the dimension "D" is smaller than 10 mm, since the thickness of the air layer located in the air flow buffer space 5 is insufficient, a very remarkable buffer effect is not achieved, and the wind noise reduction effect is not remarkable. In order to provide a relatively compact profile for the ventilator, dimension "D" may be set to 11 mm to 20 mm.
Further, as shown in fig. 4 and 5, the fan housing 40 includes air deflector strips 41, and the air deflector strips 41 are arranged at intervals, so that the fan housing 40 has a simple structure, and air can pass between adjacent air deflector strips 41, and when the ventilator is operated, air is sucked into the air duct 1 from the room, and during the period, the air deflector strips 41 divide the air intake flow, thereby facilitating the reduction of turbulence at the air inlet 401.
Further, as shown in fig. 3, the thickness of the air guiding strip 41 is gradually reduced from back to front, so that the cross section of the air guiding strip 41 is wedge-shaped, and the wind resistance of the front end of the air guiding strip 41 to the air flow can be reduced, and the air guiding strip 41 can have enough strength. The angular dimension "X" in fig. 3 may be set to 4 ° to 6 °.
Further, as shown in fig. 5, the rear portion of the panel 4 is formed with an air inlet connecting pipe 42, the front end of the air inlet connecting pipe 42 is connected with the edge portion of the air inlet 401 into a whole, as shown in fig. 3, the rear end of the air inlet connecting pipe 42 is connected with the front end of the air duct 1, the air duct 1 and the air inlet connecting pipe 42 are coaxially arranged, specifically, the front end of the air duct 1 is sleeved outside the rear end of the air inlet connecting pipe 42, and by arranging the air inlet connecting pipe 42, the air flow entering the air inlet 401 can be smoothly transited to the air duct 1, the windage borne by the air inlet flow is reduced, and the energy efficiency of the ventilator is improved.
Further, as shown in fig. 3, an air guiding fillet 4011 is formed between the front end of the air inlet connecting pipe 42 and the edge portion of the air inlet 401, so that the air flow around the air inlet 401 can smoothly flow into the air inlet 401, and the windage of the air inlet flow can be reduced.
Claims (6)
1. The utility model provides a scavenger fan of low wind noise, includes dryer (1), be equipped with flabellum (2) in dryer (1), the front side of dryer (1) is equipped with panel (4), its characterized in that: the panel (4) is formed with an air inlet (401), the position of the air inlet (401) corresponds to that of the fan blade (2), the panel (4) is formed with a fan cover part (40) at the position of the air inlet (401), and an air flow buffer space (5) is formed between the front end of the fan blade (2) and the rear end of the fan cover part (40).
2. The low wind noise ventilator of claim 1, wherein: the width of the air flow buffer space (5) in the direction parallel to the axis of the fan blade (2) is set to be more than 10 mm.
3. The low wind noise ventilator of claim 1, wherein: the fan cover part (40) comprises air guide strips (41), and the air guide strips (41) are arranged at intervals.
4. A low wind noise ventilator according to claim 3, wherein: the thickness of the air guide plate strip (41) is gradually reduced from back to front.
5. The low wind noise ventilator of claim 1, wherein: the rear part of the panel (4) is provided with an air inlet connecting pipe (42), the front end of the air inlet connecting pipe (42) is connected with the edge part of the air inlet (401) into a whole, and the rear end of the air inlet connecting pipe (42) is connected with the front end of the air duct (1).
6. The low wind noise ventilator of claim 5, wherein: an air guide round corner (4011) is formed between the front end of the air inlet connecting pipe (42) and the edge part of the air inlet (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321344018.4U CN219711838U (en) | 2023-05-30 | 2023-05-30 | Ventilation fan with low wind noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321344018.4U CN219711838U (en) | 2023-05-30 | 2023-05-30 | Ventilation fan with low wind noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219711838U true CN219711838U (en) | 2023-09-19 |
Family
ID=87999054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321344018.4U Active CN219711838U (en) | 2023-05-30 | 2023-05-30 | Ventilation fan with low wind noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219711838U (en) |
-
2023
- 2023-05-30 CN CN202321344018.4U patent/CN219711838U/en active Active
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