CN112228407A - Noise reduction structure of fan and range hood - Google Patents
Noise reduction structure of fan and range hood Download PDFInfo
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- CN112228407A CN112228407A CN202010967286.6A CN202010967286A CN112228407A CN 112228407 A CN112228407 A CN 112228407A CN 202010967286 A CN202010967286 A CN 202010967286A CN 112228407 A CN112228407 A CN 112228407A
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Classifications
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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
- 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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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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
- 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
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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
- 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
- F04D29/664—Sound attenuation by means of sound absorbing material
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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
- 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
- F04D29/665—Sound attenuation by means of resonance chambers or interference
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a noise reduction structure of a fan and a range hood, wherein the fan is provided with a volute and comprises a flow guide device, a noise reduction device, a driving device and a control device, one end of the flow guide device is arranged on a volute tongue of the volute and used for collecting noise at the position of the volute tongue, the other end of the flow guide device extends along the circumferential direction of the volute, the flow guide device and the noise reduction device are movably connected together to define a noise reduction channel together, the driving device is arranged on the outer side of the volute, the noise reduction device is arranged on the volute in a sliding mode through the driving device, the driving device is electrically connected with the control device, and the driving device drives the noise reduction device to move relative to the flow guide device so as to achieve standing wave noise reduction of different frequencies. The noise reduction device is simple in structure, noise interference of the fan can be remarkably reduced, and therefore the noise reduction effect of the fan is further improved.
Description
Technical Field
The invention relates to the technical field of kitchen electricity, in particular to a noise reduction structure of a fan and a range hood.
Background
In recent years, the cigarette making machine market mainly pushes the concepts of large air volume and large suction, and along with the improvement of the requirements of people on living quality, users pay more and more attention to the noise parameter of the cigarette making machine when purchasing the cigarette making machine, so that the quality of the noise performance of the cigarette making machine is a key factor of product competitiveness.
In recent years, the domestic cigarette machine market mainly pushes the concepts of large air volume and large suction all the time, and along with the gradual improvement of the air volume, the noise generated by the range hood is also larger and larger. In the related technology, most of cooking fume exhauster is opened, then speech sound, telephone sound, doorbell sound and child sound can not be heard, even the strong noise can cause adverse reactions such as dysphoria, headache, palpitation and the like to housewives and kitchen operators, and the long-term use can cause serious influence to physical and mental health. Therefore, the noise becomes the technical problem to be solved urgently in the existing range hood.
Disclosure of Invention
The invention aims to solve one of the problems in the prior related art at least to a certain extent, and therefore, the invention provides a noise reduction structure of a fan, which is simple in structure and can obviously reduce noise interference of the fan, thereby further improving the noise reduction effect of the fan.
In addition, the invention also provides a range hood which is reasonable in design and can effectively reduce the noise generated by the operation of the range hood.
The first object is achieved by the following technical scheme:
a noise reduction structure of a fan is provided, the fan is provided with a volute and comprises a flow guiding device, a noise reduction device, a driving device and a control device, wherein one end of the flow guiding device is arranged on a volute tongue of the volute and used for collecting noise at the position of the volute tongue, the other end of the flow guiding device is arranged in a manner of extending along the circumferential direction of the volute, the flow guiding device and the noise reduction device are movably connected together to define a noise reduction channel together, the driving device is arranged on the outer side of the volute, the noise reduction device is arranged on the volute in a sliding mode through the driving device, the driving device is electrically connected with the control device, and the driving device drives the noise reduction device to move relative to the flow guiding device so as to achieve standing wave noise reduction of different frequencies.
In some embodiments, the flow guiding device comprises a flow guiding channel and a plurality of branch channel, wherein the plurality of branch channel is arranged on the volute tongue of the volute, one end of the flow guiding channel is communicated with the volute tongue of the volute through the plurality of branch channel, and the other end of the flow guiding channel is movably connected with the noise reduction device.
In some embodiments, the noise reduction device includes an adjustment channel and a noise reduction assembly, wherein the adjustment channel is slidably disposed on the volute, one end of the adjustment channel is movably connected to the drainage device, the other end of the adjustment channel is provided with the noise reduction assembly, and the driving motor drives the adjustment channel to move relative to the drainage device to adjust the length of the noise reduction channel.
In some embodiments, the adjusting channel is provided with a plurality of through holes at one end close to the noise reduction component, and the noise reduction component covers the through holes to absorb and reduce noise in the adjusting channel.
In some embodiments, the noise reduction assembly includes a first noise reduction layer, a second noise reduction layer, and a third noise reduction layer, wherein the first noise reduction layer, the second noise reduction layer, and the third noise reduction layer are sequentially disposed in an inward-outward direction of the tuning channel.
In some embodiments, the first noise reduction layer has a thickness of 10 μm to 100 μm, the second noise reduction layer has a thickness of 100 μm to 500 μm, and the third noise reduction layer has a thickness of 500 μm to 2000 μm.
In some embodiments, the driving device includes a driving motor electrically connected to the control device, the driving motor is disposed on the volute, and an output end of the driving motor is connected to the noise reduction device.
In some embodiments, the drive device further comprises a mounting bracket mounted on the volute, the drive motor being disposed on the volute through the mounting bracket.
In some embodiments, the mounting bracket is provided with a limiting portion extending outward from an end away from the volute, and the limiting portion abuts against the noise reduction device to limit the movement of the noise reduction device.
The second objective is achieved by the following technical scheme:
a range hood comprises a fan, wherein the fan is provided with the noise reduction structure in any one of the above embodiments.
Compared with the prior art, the invention at least comprises the following beneficial effects:
1. the noise reduction structure of the fan is simple in structure, and can remarkably reduce noise interference of the fan, so that the noise reduction effect of the fan is further improved.
2. The fan noise absorber is reasonable in design and can absorb noise of different frequency bands generated by the working of the fan.
3. The range hood disclosed by the invention is reasonable in design, and can effectively reduce the noise generated by the operation of the range hood.
Drawings
FIG. 1 is a schematic structural diagram of a noise reduction structure of a wind turbine according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a noise reducing structure of a wind turbine in an embodiment of the present invention;
fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of the claims of the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 3, the present embodiment provides a noise reduction structure of a fan, where the fan 1 has a volute casing 11, and includes a flow guiding device 2, a noise reduction device 3, a driving device 4 and a control device, where one end of the flow guiding device 2 is disposed on a volute tongue 12 of the volute casing 11 for collecting noise at the position of the volute tongue 12, and the other end of the flow guiding device extends along a circumferential direction of the volute casing 11, and the flow guiding device 2 and the noise reduction device 3 are movably connected together to define a noise reduction channel together, the driving device 4 is disposed outside the volute casing 11, the noise reduction device 3 is slidably disposed on the volute casing 11 through the driving device 4, the driving device 4 is electrically connected with the control device, and the driving device 4 drives the noise reduction device 3 to move relative to the flow guiding device 2.
In this embodiment, since the impeller of the fan 1 rotates to make the airflow impact the volute tongue 12, thereby generating impact noise of the volute tongue 12 and impeller rotation noise, the volute tongue 12 of the volute casing 11 is the largest noise source position of the fan 1, it is necessary to eliminate noise at this position, the flow guide device 2 is arranged at the position of the volute tongue 12 of the volute casing 11 to guide the impact air flow to flow into the flow guide device 2, further reducing the impact of the airflow on the position of the volute tongue 12, continuously transmitting the noise entering the drainage device 2 to the direction of the noise reduction device 3, thereby leading the noise reduction device 3 to carry out noise reduction and silencing, leading the noise reduction device 3 to move relative to the drainage device 2 through the driving device 4 to adjust the length of a noise reduction channel, further realizing the standing wave silencing of different frequencies, the noise reduction device is simple in structure, and can obviously reduce noise interference of the fan 1, so that the noise reduction effect of the fan 1 is further improved.
Further, the drainage device 2 comprises a drainage channel 21 and a plurality of branch channel 22, wherein the plurality of branch channel 22 are arranged on the volute tongue 12 of the volute 11, one end of the drainage channel 21 is communicated with the volute tongue 12 of the volute 11 through the plurality of branch channel 22, the other end of the drainage channel is movably connected with the noise reduction device 3, the structure is simple, the design is reasonable, and the drainage effect of the noise at the position of the volute tongue 12 can be effectively improved.
In this embodiment, a plurality of branch pipe channels 22 are disposed at one end of the flow guiding channel 21 close to the position of the volute tongue 12, the flow guiding channel 21 is communicated with the volute tongue 12 of the volute 11 through the plurality of branch pipe channels 22, so that the air in the volute 11 is led out from the position of the volute tongue 12 to the plurality of branch pipe channels 22, the air in the plurality of branch pipe channels 22 is converged on the flow guiding channel 21, and then flows into the noise reduction device 3 through the flow guiding channel 21 to reduce noise of the noise reduction device 3.
Further, the noise reduction device 3 comprises an adjusting channel 6 and a noise reduction assembly 5, wherein the adjusting channel 6 is arranged on the volute 11 in a sliding mode through a driving motor 41, one end of the adjusting channel 6 is movably connected with the drainage device 2, the noise reduction assembly 5 is arranged at the other end of the adjusting channel, the driving motor 41 drives the adjusting channel 6 to move relative to the drainage device 2 so as to adjust the length of the noise reduction channel, the structure is simple, and the length of the noise reduction channel is adjusted, so that the adjustment of the sound absorption frequency is realized.
Preferably, the adjusting channel 6 is provided with a plurality of through holes 61 at one end close to the noise reduction assembly 5, the noise reduction assembly 5 covers the through holes 61 to absorb and reduce noise of the noise in the adjusting channel 6, the structure is simple and compact, and the noise reduction assembly 5 is favorable for noise reduction and noise reduction of the noise in the adjusting channel 6.
Specifically, the noise reduction assembly 5 includes a first noise reduction layer 51, a second noise reduction layer 52 and a third noise reduction layer 53, wherein the first noise reduction layer 51, the second noise reduction layer 52 and the third noise reduction layer 53 are sequentially arranged in the direction from inside to outside of the adjustment channel 6, and the design is reasonable, so that the noise reduction effect of the noise reduction device 3 can be further improved.
Preferably, the thickness of the first noise reduction layer 51 is 10 μm to 100 μm, the thickness of the second noise reduction layer 52 is 100 μm to 500 μm, and the thickness of the third noise reduction layer 53 is 500 μm to 2000 μm, which is reasonable and smart in design and can effectively absorb noise of different frequency bands generated by the operation of the fan 1.
In this embodiment, the adjusting channel 6 is slidably disposed on the volute 11 through the driving motor 41, and one end of the adjusting channel 6 is sleeved outside the drainage channel 21 of the drainage device 2, so that the adjusting channel 6 can movably extend and contract outside the drainage channel 21 of the drainage device 2, so that the adjusting channel 6 is movably connected with the drainage channel 21 of the drainage device 2, so that the adjusting channel 6 and the adjusting channel 6 jointly define a noise reduction channel, and the adjusting channel 6 is driven to extend and contract to adjust the length of the noise reduction channel, so as to adjust the sound absorption frequency, the longer the length of the noise reduction channel, the lower the sound absorption frequency band, the shorter the length of the noise reduction channel, the higher the sound absorption frequency band, and in addition, because the noise reduction channel is a sealed structure, only sound is transmitted in the noise reduction channel, and no fluid flows, thereby can not cause gaseous kinetic energy's loss, the other end of adjusting passageway 6 extends the setting and adjusts passageway 6 and is being provided with noise reduction assembly 5 in the one end of keeping away from drainage device 2 along the girth direction of spiral case 11, the noise in with spiral case 11 is gone into drainage device 2 the inside by spiral case 12 water conservancy diversion of spiral case 11 through drainage device 2, the noise that gets into the drainage device 2 the inside continues toward the direction transmission of noise reduction device 3, thereby make noise reduction device 3 fall the amortization of making an uproar to the noise, fall the length of making an uproar passageway in order to adjust for the motion of drainage device 2 through the drive arrangement 4 drive noise reduction device 3, thereby realize the standing wave noise elimination of different frequencies. In this embodiment, in order to further ensure the noise reduction effect of the fan 1, the length of the noise reduction channel is one fourth of the maximum noise wavelength, so that the sound reflected back after the noise enters the noise reduction channel just generates a standing wave effect with the noise, thereby realizing resonance noise reduction.
In this embodiment, the outer wall of the adjusting channel 6 is sequentially provided with a first noise reduction layer 51, a second noise reduction layer 52 and a third noise reduction layer 53, and the first noise reduction layer 51, the second noise reduction layer 52 and the third noise reduction layer 53 are sequentially arranged along the adjusting channel 6 from inside to outside, so that the first noise reduction layer 51 covers the through hole 61 formed in the adjusting channel 6, and due to the different thicknesses of the three noise reduction layers, the functional effects thereof are also different through the damping and noise elimination effects of the noise reduction layer materials, the number of the noise reduction layers of the noise reduction assembly 5 in this embodiment is not limited to three, but may be two or four, and of course, other noise reduction layers with more appropriate number may be selected according to the actual requirements, and meanwhile, the first noise reduction layer 51, the second noise reduction layer 52 and the third noise reduction layer 53 are all made of flexible materials, which may be made of flame retardant film, flame retardant paper, artificial leather, etc., certainly, other more suitable materials can be selected according to actual requirements, the flexible material layer is preferably made of ultrathin flexible materials, the thickness range of the flexible material layer is preferably 10-2000 micrometers, in addition, the sound absorption coefficient is relatively low at high frequency, the resonance frequency is usually 150-800 Hz, the maximum sound absorption coefficient is 0.3-0.4, in order to further improve the noise reduction effect, the thickness of the first noise reduction layer 51 is preferably 10-100 micrometers, the first noise reduction layer 51 is mainly arranged at the position of the through hole 61 of the noise reduction channel to play a role in damping and absorbing sound, and the first noise reduction layer resonates with noise in a frequency band of 500-700 Hz, so that the noise of 500-700 Hz is absorbed; the thickness of the second noise reduction layer 52 is preferably 100-500 μm, and the second noise reduction layer 52 is arranged outside the first noise reduction layer 51, so that the second noise reduction layer mainly plays a role in damping and absorbing sound, and generates resonance with noise in a frequency band of 300-500 Hz, and the noise of 300-500 Hz is absorbed; the thickness of the third noise reduction layer 53 is preferably 500-2000 μm, and the third noise reduction layer 53 arranged outside the second noise reduction layer 52 mainly plays a role in damping sound absorption, and generates resonance with noise in a frequency band of 150-300 Hz, so that the noise absorption of 150-300 Hz is realized. The flexible material that the layer of making an uproar adopted in this embodiment will make the flexible material have certain prestressing force when the installation is fixed to reach better noise reduction effect, the flexible material mainly is the internal damping loss when the film does whole vibration, therefore can regard as simple quality-spring system.
In this embodiment, the expansion length of the adjusting channel 6 can be controlled in a linkage manner according to the back pressure of the fan 1, and if the back pressure of the fan 1 is higher, the rotating speed of the fan 1 is faster so that the noise of the high-frequency part is more, the length of the noise reduction channel is shorter, otherwise, the length of the noise reduction channel is longer.
Further, the driving device 4 comprises a driving motor 41 electrically connected with the control device, the driving motor 41 is arranged on the volute 11, the output end of the driving motor 41 is connected with the noise reduction device 3, the structure is simple, and the driving noise reduction device 3 can be driven to perform telescopic motion relative to the drainage device 2.
Specifically, the driving device 4 further includes a mounting bracket 42, the mounting bracket 42 is mounted on the volute casing 11, and the driving motor 41 is disposed on the volute casing 11 through the mounting bracket 42, which facilitates the mounting and dismounting of the driving motor 41.
Particularly, the mounting bracket 42 is provided with a limiting portion 43 extending outwards at an end away from the volute 11, the limiting portion 43 is abutted against the noise reduction device 3 to limit the movement of the noise reduction device 3, the design is reasonable and ingenious, and the movement of the noise reduction channel can be effectively limited.
In this embodiment, a mounting bracket 42 is disposed on the volute casing 11, the driving motor 41 is mounted on the mounting bracket 42 and located at an intermediate position between the volute casing 11 and the adjusting passage 6, a gear is disposed on a rotating shaft of the driving motor 41, a rack is disposed on an outer wall of the adjusting passage 6, the gear is engaged with the rack to enable the driving motor 41 to drive the adjusting passage 6 to perform corresponding drainage and telescopic movement, a limiting portion 43 is disposed at one end of the mounting bracket 42, which is far away from the volute casing 11, and a combined action of the driving motor 41 and the limiting portion 43 is used to limit the movement of the noise reduction device 3. The driving motor 41 in this embodiment is preferably a stepping motor, but is not limited to a stepping motor, and other more suitable motors may be selected according to actual needs.
Example two:
as shown in fig. 1 to 3, the present embodiment provides a range hood, which includes a fan 1, and the fan 1 is provided with a noise reduction structure as described in the first embodiment.
In this embodiment, the range hood is provided with the flow guiding device 2 at the position of the volute tongue 12 of the volute 11 to guide the impact airflow to flow into the flow guiding device 2, so as to reduce the impact of the airflow on the position of the volute tongue 12, the noise entering the flow guiding device 2 is continuously transmitted toward the noise reducing device 3, so that the noise reducing device 3 reduces and silences the noise, the driving device 4 drives the noise reducing device 3 to move relative to the flow guiding device 2 to adjust the length of the noise reducing channel, so as to achieve the stationary wave noise elimination of different frequencies, the adjusting length of the channel 6 can be controlled in a linkage manner according to the back pressure of the fan 1 to further improve the noise reducing effect, in addition, if the rotating speed of the range hood is low, the overall noise condition of the range hood is relatively low, and a user can exit from the noise reducing function through an operation function on the control, the range hood can still work normally after quitting the noise reduction function, the design is reasonable, and the noise generated by the work of the range hood can be effectively reduced.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A noise reduction structure of a fan, wherein the fan (1) is provided with a volute (11), and is characterized by comprising a flow guide device (2), a noise reduction device (3), a driving device (4) and a control device, wherein one end of the flow guide device (2) is arranged on a volute tongue (12) of the volute (11) for collecting noise at the position of the volute tongue (12), the other end of the flow guide device is arranged in a manner of extending along the circumferential direction of the volute (11), the flow guide device (2) and the noise reduction device (3) are movably connected together to define a noise reduction channel, the driving device (4) is arranged outside the volute (11), the noise reduction device (3) is arranged on the volute (11) in a sliding manner through the driving device (4), the driving device (4) is electrically connected with the control device, and the driving device (4) drives the noise reduction device (3) to move relative to the flow guide device (2) so as not to realize noise reduction And silencing the standing wave with the same frequency.
2. The fan noise reduction structure according to claim 1, wherein the flow guiding device (2) comprises a flow guiding channel (21) and a plurality of branch pipe channels (22), wherein the plurality of branch pipe channels (22) are arranged on the volute tongue (12) of the volute (11), one end of the flow guiding channel (21) is communicated with the volute tongue (12) of the volute (11) through the plurality of branch pipe channels (22), and the other end of the flow guiding channel is movably connected with the noise reduction device (3).
3. The fan noise reduction structure according to claim 1, wherein the noise reduction device (3) comprises an adjusting channel (6) and a noise reduction assembly (5), wherein the adjusting channel (6) is slidably disposed on the volute (11) through the driving device (4), one end of the adjusting channel (6) is movably connected with the drainage device (2), the other end of the adjusting channel is provided with the noise reduction assembly (5), and the driving device (4) drives the adjusting channel (6) to move relative to the drainage device (2) so as to adjust the length of the noise reduction channel.
4. The fan noise reduction structure according to claim 3, wherein the adjusting channel (6) is provided with a plurality of through holes (61) at an end close to the noise reduction assembly (5), and the noise reduction assembly (5) covers the through holes (61) to absorb and reduce noise in the adjusting channel (6).
5. A noise reducing structure of a wind turbine according to claim 3, wherein the noise reducing assembly (5) comprises a first noise reducing layer (51), a second noise reducing layer (52) and a third noise reducing layer (53), wherein the first noise reducing layer (51), the second noise reducing layer (52) and the third noise reducing layer (53) are sequentially arranged in a direction from inside to outside of the adjusting channel (6).
6. A noise reducing structure of a wind turbine according to claim 5, characterized in that the thickness of the first noise reducing layer (51) is 10 μm-100 μm, the thickness of the second noise reducing layer (52) is 100 μm-500 μm, and the thickness of the third noise reducing layer (53) is 500 μm-2000 μm.
7. The noise reduction structure of a blower according to any one of claims 1 to 6, wherein the driving device (4) comprises a driving motor (41) electrically connected to a control device, the driving motor (41) is disposed on the volute (11), and an output end of the driving motor (41) is connected to the noise reduction device (3).
8. The noise reduction structure of a blower according to claim 7, wherein the driving device (4) further comprises a mounting bracket (42), the mounting bracket (42) is mounted on the volute (11), and the driving motor (41) is disposed on the volute (11) through the mounting bracket (42).
9. The fan noise reduction structure according to claim 8, wherein the mounting bracket (42) is provided with a limiting portion (43) extending outwards at an end away from the volute (11), and the limiting portion (43) abuts against the noise reduction device (3) to limit the movement of the noise reduction device (3).
10. A range hood comprising a fan (1), wherein a noise reduction structure according to any one of claims 1 to 9 is provided on the fan (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010967286.6A CN112228407A (en) | 2020-09-15 | 2020-09-15 | Noise reduction structure of fan and range hood |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010967286.6A CN112228407A (en) | 2020-09-15 | 2020-09-15 | Noise reduction structure of fan and range hood |
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| CN112228407A true CN112228407A (en) | 2021-01-15 |
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| CN202010967286.6A Pending CN112228407A (en) | 2020-09-15 | 2020-09-15 | Noise reduction structure of fan and range hood |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776095A (en) * | 2021-05-31 | 2021-12-10 | 华帝股份有限公司 | Noise reduction structure for range hood and range hood |
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2020
- 2020-09-15 CN CN202010967286.6A patent/CN112228407A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776095A (en) * | 2021-05-31 | 2021-12-10 | 华帝股份有限公司 | Noise reduction structure for range hood and range hood |
| CN113776095B (en) * | 2021-05-31 | 2022-12-02 | 华帝股份有限公司 | Noise reduction structure for range hood and range hood |
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