CN119042147A - Self-filtering low-noise centrifugal fan - Google Patents
Self-filtering low-noise centrifugal fan Download PDFInfo
- Publication number
- CN119042147A CN119042147A CN202411506066.8A CN202411506066A CN119042147A CN 119042147 A CN119042147 A CN 119042147A CN 202411506066 A CN202411506066 A CN 202411506066A CN 119042147 A CN119042147 A CN 119042147A
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- China
- Prior art keywords
- air inlet
- noise reduction
- cone
- air
- noise
- 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.)
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Links
- 238000001914 filtration Methods 0.000 title claims abstract description 20
- 239000000428 dust Substances 0.000 claims description 73
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
- B01D46/681—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
本发明公开了一种自滤式低噪离心风机，涉及离心风机技术领域，包括离心机壳、装配于离心机壳内的叶轮，及用于驱动叶轮转动的电机；所述离心机壳上具有进风口和出风口；所述离心机壳的进风口设置有降噪过滤机构；所述降噪过滤机构包括进风筒、过滤网及降噪栅格板；所述进风筒的两端分别为进风端和出风端，所述进风筒的出风端可拆卸地安装在所述离心机壳的进风口处；所述进风筒的进风端安装有过滤网。本发明若干个降噪锥筒可将进风筒的进风端分隔形成若干个区间，当外界空气通过过滤网后会被“分隔”并进入若干个区间内，由于降噪锥筒的外壁上均匀分布有微孔，空气流动产生的噪音会在该区间内被反射所吸收，以实现消减噪音的目的。
The present invention discloses a self-filtering low-noise centrifugal fan, which relates to the technical field of centrifugal fans, including a centrifugal casing, an impeller mounted in the centrifugal casing, and a motor for driving the impeller to rotate; the centrifugal casing is provided with an air inlet and an air outlet; the air inlet of the centrifugal casing is provided with a noise reduction filter mechanism; the noise reduction filter mechanism includes an air inlet cylinder, a filter screen and a noise reduction grid plate; the two ends of the air inlet cylinder are respectively an air inlet end and an air outlet end, and the air outlet end of the air inlet cylinder is detachably mounted at the air inlet of the centrifugal casing; the air inlet end of the air inlet cylinder is provided with a filter screen. A plurality of noise reduction cones of the present invention can separate the air inlet end of the air inlet cylinder into a plurality of intervals, and when the outside air passes through the filter screen, it will be "separated" and enter into a plurality of intervals. Since micropores are evenly distributed on the outer wall of the noise reduction cone, the noise generated by the air flow will be reflected and absorbed in the interval to achieve the purpose of reducing noise.
Description
Technical Field
The invention relates to the technical field of centrifugal fans, in particular to a self-filtering low-noise centrifugal fan.
Background
Centrifugal fans utilize impellers (centrifugal force) rotating at high speed to apply work to a gaseous medium, and the gaseous medium is converted into potential energy (pressure energy) from kinetic energy by changing the flowing direction and flowing speed of the gaseous medium. The centrifugal fan has wide application fields, such as constructional engineering, boilers, chemical industry, petroleum and environmental protection industries, and has considerable application prospect.
In addition, in the long-term use of the existing centrifugal fan, more dust is easily accumulated on a filter screen in an air inlet of the existing centrifugal fan, and if dust is not removed in time, the air inlet quantity of the centrifugal fan is easily influenced, so that the surge of the centrifugal fan is caused, and the flow and the pressure of the centrifugal fan are periodically changed during the surge, so that larger noise and vibration are generated.
Disclosure of Invention
The invention aims to provide a self-filtering low-noise centrifugal fan so as to solve the problems in the background technology.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the invention provides a self-filtering low-noise centrifugal fan, which comprises a centrifugal shell, an impeller and a motor, wherein the impeller is assembled in the centrifugal shell, and the motor is used for driving the impeller to rotate;
The air inlet of the centrifugal machine shell is provided with a noise reduction filtering mechanism, and the noise reduction filtering mechanism comprises an air inlet cylinder, a filter screen and a noise reduction grid plate;
The two ends of the air inlet cylinder are respectively an air inlet end and an air outlet end, and the air outlet end of the air inlet cylinder is detachably arranged at the air inlet of the centrifugal shell;
The noise reduction grid plate is arranged in the air inlet end of the air inlet barrel, the noise reduction grid plate comprises a plurality of noise reduction cone barrels which are coaxially arranged and reinforcing rib plates used for connecting the noise reduction cone barrels, the central axis of the noise reduction cone barrels coincides with the central axis of the air inlet barrel, the small opening ends of the noise reduction cone barrels face the air outlet end of the air inlet barrel, in two adjacent noise reduction cone barrels, the diameter of the small opening ends of the noise reduction cone barrels on the outer side is smaller than that of the large opening ends of the noise reduction cone barrels on the inner side, and micropores are uniformly distributed on the outer wall of the noise reduction cone barrels;
The noise reduction filter mechanism further comprises a dust removal assembly, the dust removal assembly comprises a rotary drum penetrating through the center of the filter screen, a wind deflector and a dust removal plate, the wind deflector and the dust removal plate are arranged on the peripheral surface of the rotary drum, the wind deflector is located on the inner side of the filter screen and is abutted against the filter screen, the dust removal plate is located on the outer side of the filter screen, the wind deflector is corresponding to the dust removal plate, and a hairbrush abutted against the filter screen is arranged on one side, close to the filter screen, of the dust removal plate.
Further, the diameter of the air inlet cylinder from the air outlet end to the air inlet end is continuously increased to form a conical channel.
Further, the noise reduction cone barrel positioned at the innermost layer is a central cone barrel, a small opening end of the central cone barrel is sealed, the rotary drum is rotatably arranged at a large opening end of the central cone barrel, a gearbox is fixedly arranged in the central cone barrel, an input shaft of the gearbox is fixedly connected with the impeller through a connecting shaft extension, and an output shaft of the gearbox is connected with the rotary drum.
Further, the dust removal board is internally provided with a dust removal channel communicated with the rotary drum in a penetrating way along the length direction of the dust removal board, one side, close to the filter screen, of the dust removal channel is uniformly provided with dust collection holes, and the dust removal assembly further comprises an air injection structure for injecting air into the rotary drum.
Further, the dust collection holes are obliquely arranged from one end of the filter screen to the other end of the filter screen towards the air flow direction of the dust collection channel.
Further, the gas injection structure comprises an L-shaped pipe, the L-shaped pipe is connected with the sealing end of the central cone, the L-shaped pipe comprises a horizontal section coaxial with a connecting shaft and a vertical section connected with one end of the horizontal section far away from the central cone, one end of the vertical section far away from the horizontal section penetrates through the side wall of the air inlet cone, the connecting shaft is positioned inside the horizontal section, a fan blade is arranged on the connecting shaft positioned in the horizontal section, and communication holes are uniformly formed in one side, close to the central cone, of the rotary drum.
Compared with the prior art, the above technical scheme has the following beneficial effects:
1. the air inlet ends of the air inlet cylinders can be divided into a plurality of sections, when outside air passes through the filter screen and is divided into a plurality of sections, micropores are uniformly distributed on the outer wall of the noise reduction cone, noise generated by air flow can be reflected and absorbed in the sections so as to achieve the purpose of noise reduction, and secondly, the cone design of the noise reduction cone (namely, in two adjacent noise reduction cones, the diameter of the small opening end of the outer noise reduction cone is smaller than that of the large opening end of the inner noise reduction cone) can also effectively reduce and obstruct the internal noise of the centrifugal fan to be transmitted outwards through the inlet end of the air inlet cylinder, so that the noise elimination and noise reduction effect is achieved.
2. The rotary drum can rotate and drive the wind shield and the dust removal plate to do the circumferential direction so as to scrape dust on the filter screen, wherein the wind shield and the dust removal plate can 'isolate' a part of wind shielding area in the filtering area of the filter screen, namely, outside air does not enter the wind inlet barrel through the wind shielding area, so that on one hand, the scraping of dust on the filter screen by the brush on the dust removal plate is facilitated, and on the other hand, the dust scraped by the brush on the dust removal plate is prevented from adhering to the filter screen again due to the flowing of air, so that the surge of the centrifugal fan is avoided, and the noise is increased.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic view of the A-A structure of FIG. 2;
FIG. 4 is a schematic view of the internal structure of the noise reduction and filtration mechanism of the present invention;
FIG. 5 is a schematic view of the partial structure at B of FIG. 3;
FIG. 6 is a schematic view of the partial structure at C of FIG. 3;
FIG. 7 is a simplified schematic diagram of the present invention in removing dust;
FIG. 8 is a schematic view of the structure of the noise reduction filter mechanism of the present invention after the filter screen is removed;
fig. 9 is a partial structural schematic diagram at D of fig. 8.
In the figure:
1-a centrifugal shell, 11-an impeller, 12-a motor, 2-a noise reduction filter mechanism, 21-a wind inlet barrel, 211-a wind inlet end, 212-a wind outlet end, 22-a filter screen, 23-a noise reduction grid plate, 231-a noise reduction cone barrel, 232-a reinforcing rib plate, 2311-a central cone barrel, 24-a dust removal component, 241-a rotary drum, 242-a wind shield, 243-a dust removal plate, 2431-a dust removal channel, 2432-a brush, 2433-a dust removal hole, 244-a gearbox, 245-a connecting shaft, 2461-an L-shaped pipe, 24611-a horizontal section, 24612-a vertical section, 2462-a fan blade and 2463-a communication hole.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
Referring to fig. 1-9, the present invention provides a self-filtering low-noise centrifugal fan, which comprises a centrifugal casing 1, an impeller 11 assembled in the centrifugal casing 1, and a motor 12 for driving the impeller 11 to rotate, wherein the centrifugal casing 1 has an air inlet and an air outlet, and when in operation, the motor 12 drives the impeller 11 to rotate so that external air enters the centrifugal casing 1 from the air inlet and is discharged from the air outlet, and the working principle is the prior art and is not described herein too.
In order to reduce noise in the working process of the centrifugal fan, as shown in fig. 2 and 3, the air inlet of the centrifugal machine shell 1 is provided with a noise reduction filter mechanism 2, and the noise reduction filter mechanism 2 comprises an air inlet cylinder 21, a filter screen 22 and a noise reduction grid plate 23, which are main components for realizing noise reduction of the invention.
The two ends of the air inlet barrel 21 are respectively provided with an air inlet end 211 and an air outlet end 212, the air outlet end 212 of the air inlet barrel 21 is detachably arranged at the air inlet of the centrifugal shell 1, the air inlet end 211 of the air inlet barrel 21 is provided with a filter screen 22, and when the centrifugal fan works, dust in air is filtered by the filter screen 22, so that the dust is prevented from entering the centrifugal fan.
As shown in fig. 3, fig. 4 and fig. 8, the noise reduction grid plate 23 is disposed in the air inlet end 211 of the air inlet barrel 21, the noise reduction grid plate 23 includes a plurality of noise reduction cone barrels 231 coaxially disposed and reinforcing ribs 232 for connecting the noise reduction cone barrels 231, the central axis of the noise reduction cone barrels 231 coincides with the central axis of the air inlet barrel 21, the small opening ends of the noise reduction cone barrels 231 face the air outlet end 212 of the air inlet barrel 21, in two adjacent noise reduction cone barrels 231, the diameter of the small opening ends of the noise reduction cone barrels 231 on the outer side is smaller than the diameter of the large opening ends of the noise reduction cone barrels 231 on the inner side, and micropores (not shown) are uniformly distributed on the outer wall of the noise reduction cone barrels 231.
The air inlet ends 211 of the air inlet cylinders 21 can be separated to form a plurality of intervals by the plurality of noise reduction cone cylinders 231, when external air passes through the filter screen 22 and is separated and enters the plurality of intervals, as micropores are uniformly distributed on the outer wall of the noise reduction cone cylinders 231, noise generated by air flow can be reflected and absorbed in the intervals so as to achieve the purpose of noise reduction, and secondly, the cone design of the noise reduction cone cylinders 231 (namely, in two adjacent noise reduction cone cylinders 231, the diameter of the small opening ends of the outer noise reduction cone cylinders 231 is smaller than that of the large opening ends of the inner noise reduction cone cylinders 231) can also effectively reduce and obstruct the internal noise of the centrifugal fan to be outwards spread through the inlet ends of the air inlet cylinders 21, so that the noise reduction and noise reduction effect is achieved.
In order to avoid the influence of the air inlet of the centrifugal shell 1 caused by the adhesion of excessive impurities on the filter screen 22, the noise generated by the centrifugal fan is caused. As shown in fig. 5 and 9, the noise reduction filtering mechanism 2 further includes a dust removing assembly 24, the dust removing assembly 24 includes a drum 241 penetrating through a center of the filter screen 22, a wind deflector 242 and a dust removing plate 243 disposed on an outer circumferential surface of the drum 241, the wind deflector 242 is disposed on an inner side of the filter screen 22 and abuts against the filter screen 22, the dust removing plate 243 is disposed on an outer side of the filter screen 22, and the wind deflector 242 corresponds to the dust removing plate 243, and a brush 2432 abutting against the filter screen 22 is disposed on a side of the dust removing plate 243 adjacent to the filter screen 22.
In use, as shown in fig. 8 and 9, the drum 241 can rotate and drive the wind deflector 242 and the dust removal plate 243 to perform circumferential direction so as to scrape dust on the filter screen 22, wherein the wind deflector 242 and the dust removal plate 243 can "isolate" a part of wind blocking area in the filtering area of the filter screen 22, i.e. outside air does not enter the wind inlet duct 21 through the wind blocking area, on one hand, the scraping of dust on the filter screen 22 by the brush 2432 on the dust removal plate 243 is facilitated, and on the other hand, the dust scraped by the brush 2432 of the dust removal plate 243 is prevented from adhering to the filter screen 22 again due to the flow of air.
As shown in fig. 3, in the embodiment of the present invention, the diameter of the air inlet tube 21 from the air outlet end 212 to the air inlet end 211 is continuously increased to form a conical channel.
Based on the above design, compared with a straight cylinder type air inlet structure, the filter area of the filter screen 22 can be increased on one hand, the air inlet quantity of the centrifugal fan can be improved, and on the other hand, the air can flow obliquely towards the air outlet end 212 of the air inlet cylinder 21 by being matched with the noise reduction grid plate 23.
As shown in fig. 3, 6 and 7, in the embodiment of the present invention, the noise reduction cone 231 located at the innermost layer is a central cone 2311, a small opening end of the central cone 2311 is sealed, the drum 241 is rotatably disposed at a large opening end of the central cone 2311, a gearbox 244 is fixedly disposed in the central cone 2311, an input shaft of the gearbox 244 is fixedly connected with the impeller 11 through a connection shaft 245, and an output shaft of the gearbox 244 is connected with the drum 241. Based on the above design, when the centrifugal fan works, the input shaft of the gearbox 244 can be synchronously rotated through the connecting shaft 245, at this time, the gearbox 244 can reduce the rotation speed and the output end drives the rotary drum 241 to rotate to automatically realize dust treatment, and an external driving source is not needed.
As shown in fig. 5, 7 and 9, in the embodiment of the present invention, the dust removing plate 243 is provided with a dust removing channel 2431 penetrating through the drum 241 along the length direction thereof, a dust collecting hole 2433 is provided on one side of the dust removing channel 2431 near the filter screen 22, and the dust removing assembly 24 further includes an air injecting structure for injecting air into the drum 241. Based on the above design, during operation, gas is injected into the drum 241 by the gas injection structure, and then flows along the dust removing channel 2431 at a high speed after entering the drum 241, in this process, the gas pressure in the dust removing channel 2431 is reduced, the dust scraped by the brush 2432 of the dust removing plate 243 enters the dust removing channel 2431 through the dust collecting hole 2433 (bernoulli principle), and finally is automatically discharged from the dust outlet of the dust removing channel 2431 shown in fig. 9.
Further, the dust collection hole 2433 is inclined from one end to the other end of the filter 22 toward the air flow direction of the dust collection channel 2431.
As shown in fig. 6, in the embodiment of the present invention, the air injection structure includes an L-shaped pipe 2461, the L-shaped pipe 2461 is connected with the sealed end of the central cone 2311, the L-shaped pipe 2461 includes a horizontal segment 24611 coaxial with the connecting shaft 245, and a vertical segment 24612 connected to an end of the horizontal segment 24611 away from the central cone 2311, and, as shown in fig. 3, an end of the vertical segment 24612 away from the horizontal segment 24611 penetrates through the sidewall of the air inlet tube 21, the connecting shaft 245 is located inside the horizontal segment 24611, the connecting shaft 245 located inside the horizontal segment 24611 is provided with blades 2462, and a side of the drum 241 close to the central cone 2311 is uniformly provided with communication holes 2463. Referring to fig. 6 and 7, the arrow in fig. 7 indicates the gas flow direction, and based on the above design, during operation, the connecting shaft 245 can drive the fan blades 2462 to rotate, so that external air enters the central cone 2311 through the L-shaped tube 2461, and then enters the rotary drum 241 through the communication hole 2463, that is, the centrifugal fan automatically injects gas into the rotary drum 241 to remove dust during operation, and no external air supply is needed.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411506066.8A CN119042147B (en) | 2024-10-28 | 2024-10-28 | A self-filtering low-noise centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411506066.8A CN119042147B (en) | 2024-10-28 | 2024-10-28 | A self-filtering low-noise centrifugal fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN119042147A true CN119042147A (en) | 2024-11-29 |
| CN119042147B CN119042147B (en) | 2025-01-24 |
Family
ID=93579504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411506066.8A Active CN119042147B (en) | 2024-10-28 | 2024-10-28 | A self-filtering low-noise centrifugal fan |
Country Status (1)
| Country | Link |
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| CN (1) | CN119042147B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119825730A (en) * | 2025-03-17 | 2025-04-15 | 湖南鑫宏源高科有限公司 | High-speed low-noise centrifugal fan with air filtering effect |
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| KR20110065828A (en) * | 2009-12-10 | 2011-06-16 | 유영근 | High efficiency ventilator |
| CN209724798U (en) * | 2019-04-10 | 2019-12-03 | 宜昌市凯诺电气有限公司 | A kind of low noise air duct |
| EP3578826A1 (en) * | 2018-06-05 | 2019-12-11 | Valeo Japan Co., Ltd. | Blower |
| KR102113286B1 (en) * | 2019-01-28 | 2020-05-21 | 장원일 | Portable air cleaner |
| FR3109175A1 (en) * | 2020-04-10 | 2021-10-15 | Safran Aircraft Engines | Conical discharge duct grille |
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| CN215979998U (en) * | 2021-10-11 | 2022-03-08 | 天津市金中基暖通净化设备有限公司 | Dustproof centrifugal fan |
| CN115111176A (en) * | 2022-06-30 | 2022-09-27 | 青岛雷霆重工股份有限公司 | Low-pitch noise reduction fan |
| CN116447175A (en) * | 2023-05-05 | 2023-07-18 | 无锡宜友机电制造有限公司 | Centrifugal fan for industrial ventilation |
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2024
- 2024-10-28 CN CN202411506066.8A patent/CN119042147B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110065828A (en) * | 2009-12-10 | 2011-06-16 | 유영근 | High efficiency ventilator |
| EP3578826A1 (en) * | 2018-06-05 | 2019-12-11 | Valeo Japan Co., Ltd. | Blower |
| KR102113286B1 (en) * | 2019-01-28 | 2020-05-21 | 장원일 | Portable air cleaner |
| CN209724798U (en) * | 2019-04-10 | 2019-12-03 | 宜昌市凯诺电气有限公司 | A kind of low noise air duct |
| FR3109175A1 (en) * | 2020-04-10 | 2021-10-15 | Safran Aircraft Engines | Conical discharge duct grille |
| CN214577912U (en) * | 2020-11-24 | 2021-11-02 | 四川沃克森环境技术有限公司 | Air inlet box of fan |
| CN215979998U (en) * | 2021-10-11 | 2022-03-08 | 天津市金中基暖通净化设备有限公司 | Dustproof centrifugal fan |
| CN115111176A (en) * | 2022-06-30 | 2022-09-27 | 青岛雷霆重工股份有限公司 | Low-pitch noise reduction fan |
| CN116447175A (en) * | 2023-05-05 | 2023-07-18 | 无锡宜友机电制造有限公司 | Centrifugal fan for industrial ventilation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119825730A (en) * | 2025-03-17 | 2025-04-15 | 湖南鑫宏源高科有限公司 | High-speed low-noise centrifugal fan with air filtering effect |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119042147B (en) | 2025-01-24 |
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