CN110094776A - A kind of noise reducing type range hood - Google Patents
A kind of noise reducing type range hood Download PDFInfo
- Publication number
- CN110094776A CN110094776A CN201810098570.7A CN201810098570A CN110094776A CN 110094776 A CN110094776 A CN 110094776A CN 201810098570 A CN201810098570 A CN 201810098570A CN 110094776 A CN110094776 A CN 110094776A
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- China
- Prior art keywords
- noise reduction
- front side
- reduction cavity
- range hood
- noise
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- 230000009467 reduction Effects 0.000 claims abstract description 99
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims abstract description 4
- 239000003517 fume Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010411 cooking Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000008569 process Effects 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
- 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
- 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
Landscapes
- 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
A kind of noise reducing type range hood, denoising device is installed on blower cover board, denoising device includes the mutually matched back side panel in front and back and front side board, the noise reduction hole being circumferentially successively spaced apart is provided on back side panel, the medial surface of front side board be equipped with circumferentially be sequentially distributed and with the one-to-one noise reduction cavity group in noise reduction hole, each noise reduction cavity group includes at least two noise reduction cavities, the circumferentially successively unidirectional variation of the volume size of noise reduction cavity in same noise reduction cavity group, and the change direction of the volume size of the noise reduction cavity in adjacent noise reduction cavity group is consistent, the driving mechanism that front side board and back side panel can be driven to make circumferentially opposed movement is installed on blower cover board.The present invention has the advantages that the noise reducing type range hood drives front side board and back side panel to relatively rotate by driving mechanism, noise reduction hole is set to correspond to the noise reduction cavity of different volumes, the resonant frequency of noise reduction cavity and the wind under range hood different stalls frequency of making an uproar can be made to match, to realize effective noise reduction.
Description
Technical field
The present invention relates to a kind of range hoods, more particularly, to a kind of noise reducing type range hood.
Background technique
The Chinese way of cooking can generate a large amount of oil smoke, and for the health for keeping kitchen environment cleaning and human body, range hood is had become
For one of essential equipment in Modern Family kitchen.In the process of running, air motion generates turbulent flow and issues range hood
Noise influences the culinary art experience and health of people.In order to reduce the noise of range hood, people have invented various with drop
The range hood for structure of making an uproar, such as the middle promulgated by the State Council of Patent No. 201310627547.X (Authorization Notice No. is 103697512 B of CN)
Sound-absorbing is arranged in the advance tuyere position of face spiral case in " a kind of silence exhauster for removing cooking fumes " disclosed in bright patent, the range hood
Micropore is arranged on sound-absorbing pod, and the rear panel in sound-absorbing pod face advance air port is obliquely installed for pod, makes it
Preceding oil smoke passway diameter between the advance air port of spiral case gradually becomes smaller from bottom to top, so that air-flow is accelerated, and be directed into
Enter the advance air port of spiral case.Although the micropore in the silence exhauster for removing cooking fumes plays the role of absorbing sound and lowering noise, rear panel inclination
Setting plays acceleration air-flow, so that it is rapidly entered the effect of air inlet, since the frequency noise of common range hood is main
It is distributed in 100HZ~2000HZ or so, belongs to low frequency noise, in above-mentioned patent although microwell plate sound absorption structure has good drop
The effect of making an uproar, but it is very strong to the selectivity of sound absorption frequency, only there are good absorption, sound absorption frequency to the noise near resonant frequency
With relatively narrow.
In addition, the Chinese way of cooking is complex changeable, such as frying boiling etc., so common range hood is usually provided with
Multiple gears, such as quick-fried shelves, top gear, low or first gear, mute file etc. are made with being supplied to when user cooks different dish
With.Obviously, when user uses different gears, the air quantity suction generated is different, and the noise generated is also different, and
Generated noise under different stalls can not be absorbed using single micropore noise reduction, noise reduction effect needs to be further increased.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to above-mentioned state of the art, providing can be in blower gear size
Adjust the noise reducing type range hood of noise reduction cavity resonant frequency.
The technical scheme of the invention to solve the technical problem is: the noise reducing type range hood, including blower rack
With the blower being set in blower rack, blower rack front side is equipped with blower cover board, is equipped with denoising device on the blower cover board,
Be characterized in that: the denoising device includes the mutually matched back side panel in front and back and front side board, is provided on the back side panel along week
To the noise reduction hole being successively spaced apart, the medial surface of the front side board be equipped with circumferentially be sequentially distributed and with noise reduction hole one by one
Corresponding noise reduction cavity group, each noise reduction cavity group include at least two noise reduction cavities, the volume of the noise reduction cavity in same noise reduction cavity group
Size circumferentially successively unidirectional variation, and the change direction of the volume size of the noise reduction cavity in adjacent noise reduction cavity group is consistent,
The driving mechanism that front side board and back side panel can be driven to make circumferentially opposed movement is installed on the blower cover board.
In order to improve noise reduction effect, it is provided with the through-hole opposite with air inlet on the blower cover board, after described
Side plate and front side board are set to position corresponding with through-hole.
As a preferred embodiment, the back side panel and front side board are in the form of annular discs, and the noise reduction hole is in the back side panel
Upper is in evenly spaced spoke-like distribution, and the noise reduction hole interval for being distributed in same spoke is uniformly distributed, correspondingly, the noise reduction
Circumferential direction and in the radial direction equal equal part of the chamber group in front side board.In this way, due to air inlet be it is round, noise by center to
Surrounding is in gradually reducing tendency, and in the case where noise reduction hole is constant, the variation of noise reduction cavity radius gradually becomes larger from center to periphery,
To enable the resonant frequency of noise reduction cavity to correspond to the variation of air inlet noise, noise reduction effect is more preferable.
Further preferably, the circumferential width of the adjacent noise reduction cavity in each noise reduction cavity group successively unidirectionally changes, and drops
The depth of chamber of making an uproar and radial width remain unchanged.
Driving mechanism can have a variety of structures, it is preferable that the driving mechanism includes motor, screw rod and gear ring, described
Motor is mounted on the blower cover board, and the screw rod is mounted on the output shaft of the motor, and the gear ring is mounted on described
The periphery of front side board is simultaneously meshed with the screw rod.
In order to limit to front side board, the periphery of the front side board is equipped with flange, and the gear ring is mounted on the method
Lan Shang is equipped with the limit sliding chutes for flange insertion on the front side board.
As another preferred embodiment of driving mechanism, the driving mechanism includes motor and bracket, the bracket with
Blower cover board is mutually fixed, motor installation on the bracket, and the output shaft of motor pass through bracket and be connected to it is described before
On the centre bore of side plate.
Further preferably, each noise reduction cavity group includes that there are three the noise reduction cavities.
As another preferred embodiment, the back side panel and front side board are annular in shape.
As the preferred of any of the above-described scheme, which further includes having exhaust fume collecting hood, the exhaust fume collecting hood installation
In the lower section of blower rack, exhaust fume collecting hood has the air inlet being connected with air inlet.
Compared with the prior art, the advantages of the present invention are as follows: the denoising device of the noise reducing type range hood passes through in rear side
The noise reduction hole being circumferentially successively spaced apart is set on plate, on the medial surface of side plate be equipped with circumferentially be sequentially distributed and with
The one-to-one noise reduction cavity group in noise reduction hole, driving mechanism drive front side board and back side panel to relatively rotate, noise reduction hole are enable to correspond to not
The noise reduction cavity of same volume can make the resonant frequency of noise reduction cavity shelves different from range hood according to Helmholz resonance principle
The wind that position generates frequency of making an uproar is identical or match, to realize effective noise reduction.
Detailed description of the invention
Fig. 1 is one structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the structure sectional view of the embodiment of the present invention one；
Fig. 3 is the blower interior structural schematic diagram of the embodiment of the present invention one；
Fig. 4 is the mounting structure schematic diagram of the denoising device of the embodiment of the present invention one；
Fig. 5 is the perspective exploded view of denoising device shown in Fig. 4；
Fig. 6 is the structural schematic diagram of denoising device shown in Fig. 4；
Fig. 7 be the present invention be embodiment two denoising device mounting structure schematic diagram；
Fig. 8 is the perspective exploded view of denoising device shown in Fig. 7；
Fig. 9 is the structural schematic diagram of the denoising device of the embodiment of the present invention three.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment one:
It as shown in Figures 1 to 5, is preceding to noise reducing type range hood in the present embodiment with direction shown in arrow A in Fig. 2
Including blower rack 1, blower 2 is installed inside blower rack 1, the front side of blower 2 has air inlet 21, the front side of blower rack 1
Blower cover board 3 is installed, exhaust fume collecting hood 6 is installed below blower rack 1, exhaust fume collecting hood 6 have be connected with air inlet 21 into
Air port.
Denoising device 4 is installed, denoising device 4 includes the mutually matched back side panel 41 in front and back and front side on blower cover board 3
Plate 42, is provided with the through-hole 31 opposite with air inlet 21 on blower cover board 3, back side panel 41 and front side board 42 is set to and through-hole
31 corresponding positions.
In the present embodiment, back side panel 41 and front side board 42 are in the form of annular discs, and back side panel 41 is microwell plate, on back side panel 41
It is provided with the noise reduction hole 411 being circumferentially successively spaced apart, and noise reduction hole 411 is in evenly spaced spoke on back side panel 41 simultaneously
Strip distribution, and the interval of noise reduction hole 411 for being distributed in same spoke is uniformly distributed.The medial surface of front side board 42 was equipped with along week
To be sequentially distributed and with the one-to-one noise reduction cavity group 421 in noise reduction hole 411, and noise reduction cavity group 421 front side board 42 circumferential direction and
Equal equal part in the radial direction.Each noise reduction cavity group 421 in the present embodiment includes that there are three noise reduction cavity 422, same noise reduction cavity groups
The circumferentially successively unidirectional variation, and the noise reduction cavity 422 in adjacent noise reduction cavity group 421 of the volume size of noise reduction cavity 422 in 421
Volume size change direction it is consistent, as shown in fig. 6, angular relationship corresponding to adjacent noise reduction cavity 422 be α < β < γ,
The circumferential width of adjacent noise reduction cavity 422 in each noise reduction cavity group 421 successively unidirectionally changes, and the depth and diameter of noise reduction cavity 422
It is remained unchanged to width, in this way, the volume of the noise reduction cavity 422 in same noise reduction cavity group 421 becomes larger along clockwise direction.
Back side panel 41 in the present embodiment is fixed, the opposite posterior plate 41 under the driving of driving mechanism 5 of front side board 42
Rotation.Specifically, driving mechanism 5 includes motor 51, screw rod 52 and gear ring 53, and motor 51 is mounted on blower cover board 3, screw rod 52
It is mounted on the output shaft of motor 51, gear ring 53 is mounted on the periphery of front side board 42 and is meshed with screw rod 52.In addition, front side board
42 periphery is equipped with flange 43, and gear ring 53 is mounted on flange 43, and the limit being embedded in for flange 43 is equipped on front side board 42
Position sliding slot 44.When motor 51 rotates, gear ring 53 can be driven to rotate synchronously, and then 42 opposite posterior plate 41 of front side board is driven to make week
To relative motion.
According to Helmholz resonance principle, the resonant frequency of each independent noise reduction cavity isC is the velocity of sound, and S is
Corresponding noise reduction hole area, V are noise reduction cavity volume, and L is the effective neck length in noise reduction hole.It follows that the situation constant in other parameters
Under, noise reduction cavity volume becomes larger, and resonant frequency f reduces, conversely, noise reduction cavity volume becomes smaller, resonant frequency f becomes larger.Utilize He Muhuo
Hereby resonate noise reduction principle, and the air in air column and noise reduction cavity in noise reduction hole constitutes elastic resonance system, works as range hood
Partial noise frequency it is identical with the intrinsic frequency of this resonance system when, resonance and and hole wall occur for air column in noise reduction hole
Severe friction occurs, friction enables sound to be converted into thermal energy, to achieve the purpose that noise elimination.
As shown in fig. 6, range hood is when high tap position is run, air quantity is maximum, and wind speed is most fast, and corresponding wind makes an uproar frequency also most
Greatly, at this point, motor 51 drives front side board 42 to rotate clockwise, make the smallest noise reduction cavity 422 of 411 corresponding volume of noise reduction hole, make to drop
It makes an uproar the resonant frequency of chamber 422 and the frequency of making an uproar of the wind under high tap position is identical or match.When range hood low-grade location is run, air quantity
Minimum, wind speed is minimum, and corresponding wind frequency of making an uproar is also minimum, at this point, motor 51 drives front side board 42 to rotate counterclockwise, makes noise reduction hole
The maximum noise reduction cavity 422 of 411 corresponding volumes, make the resonant frequency of noise reduction cavity 422 and the wind under low-grade location make an uproar frequency it is identical or
Match.If range hood has middle gear, front side board 42 is rotated to the noise reduction cavity for keeping 411 corresponding volume size of noise reduction hole placed in the middle
422.
Embodiment two:
As shown in Figure 7 and Figure 8, the driving mechanism 5 in the present embodiment includes motor 51 and bracket 50, bracket 50 and fan cover
3 phase of plate is fixed, and motor 51 is mounted on bracket 50, and the output shaft of motor 51 passes through bracket 50 and is connected in front side board 42
On heart hole, the periphery of front side board 42 is also equipped with limit sliding chutes 44.When work, motor 51 drives front side board 42 to rotate.This implementation
The working principle of example is the same as example 1, not reinflated description herein.
Embodiment three:
As shown in figure 9, the back side panel 41 and front side board 42 of the present embodiment are annular in shape, noise reduction is provided on back side panel 41
Hole 411, front side board 42 are equipped with noise reduction cavity group, and each noise reduction cavity group includes three noise reduction cavities 422, the working principle of the present embodiment
It is the same as example 1, herein not reinflated description.
Claims (10)
1. a kind of noise reducing type range hood, the blower (2) including blower rack (1) and in blower rack, blower rack (1) front side are set
There are blower cover board (3), denoising device (4) are installed on the blower cover board (3), it is characterised in that: the denoising device (4)
Including the mutually matched back side panel in front and back (41) and front side board (42), it is provided on the back side panel (41) and is circumferentially successively spaced
The noise reduction hole (411) of distribution, the medial surface of the front side board (42) be equipped with circumferentially be sequentially distributed and with noise reduction hole one by one
Corresponding noise reduction cavity group (421), each noise reduction cavity group (421) include at least two noise reduction cavities (422), same noise reduction cavity group
(421) the circumferentially successively unidirectional variation, and the drop in adjacent noise reduction cavity group (421) of the volume size of the noise reduction cavity (422) in
Make an uproar chamber (422) volume size change direction it is consistent, front side board (42) can be driven by being equipped on the blower cover board (3)
Make the driving mechanism (5) of circumferentially opposed movement with back side panel (41).
2. noise reducing type range hood according to claim 1, it is characterised in that: be provided on the blower cover board (3) with
The opposite through-hole (31) of air inlet (21), the back side panel (41) and front side board (42) are set to corresponding with through-hole (31)
Position.
3. noise reducing type range hood according to claim 1, it is characterised in that: the back side panel (41) and front side board (42)
In the form of annular discs, the noise reduction hole (411) is in evenly spaced spoke-like distribution on the back side panel (41), and is distributed in same
One spoke noise reduction hole (411) interval be uniformly distributed, correspondingly, the noise reduction cavity group (421) front side board (42) circumferential direction and
Equal equal part in the radial direction.
4. noise reducing type range hood according to claim 3, it is characterised in that: in each noise reduction cavity group (421)
The circumferential width of adjacent noise reduction cavity (422) successively unidirectionally changes, and the depth of noise reduction cavity (422) and radial width remain unchanged.
5. noise reducing type range hood according to claim 3, it is characterised in that: the driving mechanism (5) includes motor
(51), screw rod (52) and gear ring (53), the motor (51) are mounted on the blower cover board (3), screw rod (52) installation
On the output shaft of the motor (51), the gear ring (53) be mounted on the periphery of the front side board (42) and with the screw rod
(52) it is meshed.
6. noise reducing type range hood according to claim 5, it is characterised in that: the periphery of the front side board (42) is equipped with
Flange (43), the gear ring (53) are mounted on the flange (43), are equipped on the front side board (42) for the flange
(43) limit sliding chutes (44) being embedded in.
7. noise reducing type range hood according to claim 3, it is characterised in that: the driving mechanism (5) includes motor
(51) it is mutually fixed with bracket (50), the bracket (50) with blower cover board (3), the motor (51) is mounted on the bracket (50)
On, and the output shaft of motor (51) passes through bracket (50) and is connected on the centre bore of the front side board (42).
8. noise reducing type range hood according to claim 1, it is characterised in that: each noise reduction cavity group (421) packet
Containing there are three the noise reduction cavity (422).
9. noise reducing type range hood according to claim 1, it is characterised in that: the back side panel (41) and front side board
(42) annular in shape.
10. according to claim 1 to noise reducing type range hood described in any claim in 9, it is characterised in that: further include having
Exhaust fume collecting hood (6), the exhaust fume collecting hood (6) are mounted on the lower section of blower rack (1), and exhaust fume collecting hood (6) has and air inlet (21) phase
The air inlet of connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098570.7A CN110094776B (en) | 2018-01-31 | 2018-01-31 | Noise-reducing type range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098570.7A CN110094776B (en) | 2018-01-31 | 2018-01-31 | Noise-reducing type range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110094776A true CN110094776A (en) | 2019-08-06 |
| CN110094776B CN110094776B (en) | 2024-02-20 |
Family
ID=67443228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810098570.7A Active CN110094776B (en) | 2018-01-31 | 2018-01-31 | Noise-reducing type range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110094776B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412511A (en) * | 2020-05-07 | 2020-07-14 | 合肥柏隆科技发展有限公司 | Noise-reducing range hood |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3317103A1 (en) * | 1983-05-10 | 1984-11-15 | Metzeler Kautschuk GmbH, 8000 München | ANCHORING, VOLUME-CHANGING RESONATOR IN THE FORM OF A SILATOR |
| CN101289952A (en) * | 2008-06-03 | 2008-10-22 | 重庆大学 | Expanding cavity adjustable exhaust silencer |
| CN102588095A (en) * | 2012-03-08 | 2012-07-18 | 雅柯斯电力科技（中国）有限公司 | Noise reducing box and noise reducing box unit thereof |
| CN203552690U (en) * | 2013-11-11 | 2014-04-16 | 上海大众汽车有限公司 | Adjustable resonant cavity |
| CN105570201A (en) * | 2016-02-29 | 2016-05-11 | 宁波方太厨具有限公司 | Noise reduction flow collector used for centrifugal fan in range hood |
| CN207907314U (en) * | 2018-01-31 | 2018-09-25 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
-
2018
- 2018-01-31 CN CN201810098570.7A patent/CN110094776B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3317103A1 (en) * | 1983-05-10 | 1984-11-15 | Metzeler Kautschuk GmbH, 8000 München | ANCHORING, VOLUME-CHANGING RESONATOR IN THE FORM OF A SILATOR |
| CN101289952A (en) * | 2008-06-03 | 2008-10-22 | 重庆大学 | Expanding cavity adjustable exhaust silencer |
| CN102588095A (en) * | 2012-03-08 | 2012-07-18 | 雅柯斯电力科技（中国）有限公司 | Noise reducing box and noise reducing box unit thereof |
| CN203552690U (en) * | 2013-11-11 | 2014-04-16 | 上海大众汽车有限公司 | Adjustable resonant cavity |
| CN105570201A (en) * | 2016-02-29 | 2016-05-11 | 宁波方太厨具有限公司 | Noise reduction flow collector used for centrifugal fan in range hood |
| CN207907314U (en) * | 2018-01-31 | 2018-09-25 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412511A (en) * | 2020-05-07 | 2020-07-14 | 合肥柏隆科技发展有限公司 | Noise-reducing range hood |
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| Publication number | Publication date |
|---|---|
| CN110094776B (en) | 2024-02-20 |
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