CN207907315U - A kind of noise reducing type range hood - Google Patents
A kind of noise reducing type range hood Download PDFInfo
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- CN207907315U CN207907315U CN201820174927.0U CN201820174927U CN207907315U CN 207907315 U CN207907315 U CN 207907315U CN 201820174927 U CN201820174927 U CN 201820174927U CN 207907315 U CN207907315 U CN 207907315U
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- noise reduction
- reduction cavity
- wind turbine
- noise
- range hood
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Abstract
A kind of noise reducing type range hood, including blower rack and wind turbine, wind turbine cover board is equipped on front side of blower rack, the vertical noise reduction hole being spaced apart successively is provided on wind turbine cover board, there is front shroud in the installed in front of wind turbine cover board, the rear wall of front shroud is equipped with vertical be sequentially distributed and noise reduction cavity group corresponding with noise reduction hole, each noise reduction cavity group includes at least two noise reduction cavities, the volume size of noise reduction cavity in same noise reduction cavity group is along vertically unidirectional variation successively, 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 shroud can be driven to make vertical motion with respect to wind turbine cover board is installed on wind turbine cover board.The utility model has the advantage of：The noise reducing type range hood drives front shroud and wind turbine cover board to move up and down 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 utility model is related to a kind of range hoods, more particularly, to a kind of noise reducing type range hood.
Background technology
The Chinese way of cooking will produce a large amount of oil smoke, to keep the health of kitchen environment cleaning and human body, range hood to have become
For one of essential equipment in Modern Family kitchen.In the process of running, air motion generates turbulent flow and sends out range hood
Noise influences culinary art experience and the 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 China of Patent No. 201310627547.X (Authorization Notice No. is 103697512 B of CN)
Disclosed in patent of invention《A kind of silence exhauster for removing cooking fumes》, which is arranged in the advance tuyere position of face spiral case inhales
Micropore is arranged on sound-absorbing kuppe, and the rear panel in sound-absorbing kuppe face advance air port is obliquely installed for sound kuppe, makes
Its preceding oil smoke passway diameter between the advance air port of spiral case tapers into from bottom to top, so that air-flow is accelerated, and guide
Into 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 inclines
Tiltedly setting plays acceleration air-flow, so that it is rapidly entered the effect of air inlet, due to the frequency noise master of common range hood
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
Noise Reduction, but it is very strong to the selectivity for the frequency that absorbs sound, only there is good absorption to the noise near resonant frequency, absorbs sound
Frequency band is 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, quiet shelves etc., to make when user being supplied to cook 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 needs to be further increased.
Utility model content
Technical problem to be solved in the utility model is present situation for the above-mentioned prior art, and providing can be in wind turbine gear
The noise reducing type range hood of big minor adjustment noise reduction cavity resonant frequency.
Technical solution is used by the utility model solves above-mentioned technical problem：The noise reducing type range hood, including wind
Rack and the wind turbine in blower rack, blower rack front side are equipped with wind turbine cover board, it is characterised in that：It is opened on the wind turbine cover board
There is the vertical noise reduction hole being spaced apart successively, has front shroud in the installed in front of wind turbine cover board, set on the rear wall of the front shroud
Have it is vertical be sequentially distributed and noise reduction cavity group corresponding with noise reduction hole, each noise reduction cavity group include at least two noise reduction cavities, together
The volume size of noise reduction cavity in one noise reduction cavity group changes along vertically unidirectional successively, and the noise reduction cavity in adjacent noise reduction cavity group
The change direction of volume size is consistent, and being equipped on the wind turbine cover board can drive front shroud to make vertically with respect to wind turbine cover board
The driving mechanism of movement.
In order to improve noise reduction, the noise reduction hole lines up in the horizontal direction, and accordingly, the noise reduction cavity group is in water
It square lines up upwards.
In order to further increase noise reduction, the noise reduction hole is integrally rectangular to be distributed and set on face air inlet
On position, accordingly, the noise reduction cavity integrally rectangular distribution.
As a preferred embodiment, the different noise reduction cavities in the same noise reduction cavity group correspond to the noise reduction of different area size
Hole.In this manner it is achieved that the synchronization noise reduction of more than two frequency bands.
The volume change of noise reduction cavity can be there are many form, it is preferable that all noise reduction cavities in the same noise reduction cavity group
Transverse width and depth remain unchanged, and the vertical width of noise reduction cavity changes successively.
Further preferably, each noise reduction cavity group includes the noise reduction cavity described in two, and the body for the noise reduction cavity being located above
Volume of the product more than underlying noise reduction cavity.In this way, can be used for coordinating the suction of two gears of only high tap position and low-grade location
Kitchen ventilator, for further including the range hood for having intervening gears, each noise reduction cavity group needs to include three noise reduction cavities, and is located at
Between the volume of noise reduction cavity also size is placed in the middle.
Further preferably, the cross section of the noise reduction cavity is square, and the noise reduction hole is circular hole.
Driving mechanism can have a variety of structures, it is preferable that the driving mechanism includes push-rod electric machine, guide holder and guiding
Bar, the push-rod electric machine are mounted on the wind turbine cover board, and the output end of push-rod electric machine acts on the front shroud, the guiding
Seat is mounted on the wind turbine cover board, and guide rod is mounted on the guide holder, and the left and right sides of the front shroud is mounted on institute
It states on guide rod, front shroud makees vertical motion under the driving of the push-rod electric machine along guide rod.
In order to keep electric pushrod more stable front shroud is driven to move up and down, it is preferable that the guide rod there are four
And four corners of the front shroud are respectively arranged on, four ends angle of the front shroud is movably arranged on corresponding guide rod,
The push-rod electric machine is set to the top of the front shroud, and offsets at the top of the output end and front shroud of push-rod electric machine.
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 prior art, the utility model has the advantage of：The noise reducing type range hood passes through on wind turbine cover board
The vertical noise reduction hole being spaced apart successively is set, is arranged on the front shroud on front side of wind turbine cover board and is vertically sequentially distributed and and noise reduction
The corresponding noise reduction cavity group in hole, when front shroud moves up and down under the action of the drive mechanism, noise reduction hole can correspond to the drop of different volumes
Chamber of making an uproar can make the wind of the different stalls generation of the resonant frequency and range hood of noise reduction cavity according to Helmholz resonance principle
Frequency of making an uproar is identical or matches, to realize effective noise reduction.
Description of the drawings
Fig. 1 is one structural schematic diagram of the utility model embodiment；
Fig. 2 is the structure sectional view of the utility model embodiment one；
Fig. 3 is the blower interior structural schematic diagram of the utility model embodiment one；
Fig. 4 is the decomposition diagram of the noise reducing mechanism of the utility model embodiment one；
Fig. 5 is the structural schematic diagram of the front shroud of the utility model embodiment one；
Fig. 6 is the enlarged diagram of part B in Fig. 5；
Fig. 7 is the structural schematic diagram of the noise reducing mechanism of the utility model embodiment one；
Fig. 8 is lateral partial structurtes sectional view of the utility model embodiment one in the larger noise reduction cavity of noise reduction hole corresponding volume；
Fig. 9 is lateral partial structurtes sectional view of the utility model embodiment one in the smaller noise reduction cavity of noise reduction hole corresponding volume；
Figure 10 is that the big noise reduction hole of the utility model embodiment two corresponds to the partial structural diagram of big noise reduction cavity；
Figure 11 is that the small noise reduction hole of the utility model embodiment two corresponds to the partial structural diagram of small noise reduction cavity.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing embodiment.
Embodiment one：
As shown in Figures 1 to 7, to the noise reducing type range hood in the present embodiment before being with direction shown in arrow A in Fig. 2
Including blower rack 1, wind turbine 2 is installed inside blower rack 1, the front side of wind turbine 2 has air inlet 21, the front side of blower rack 1
Wind turbine cover board 3 is installed, 1 lower section of blower rack is equipped with exhaust fume collecting hood 6, exhaust fume collecting hood 6 have be connected with air inlet 21 into
Air port.
In the present embodiment, the vertical noise reduction hole 31 being spaced apart successively is provided on wind turbine cover board 3, noise reduction hole 31 is circular hole
And size is equal, has front shroud 4 in the installed in front of wind turbine cover board 3, the rear wall of front shroud 4, which is equipped with, to be vertically sequentially distributed
Noise reduction cavity group 41, and noise reduction cavity group 41 corresponds to a noise reduction hole 31.In the present embodiment, a noise reduction cavity group 41 includes
The cross section of two noise reduction cavities 411, noise reduction cavity 411 is rectangular.The volume for the noise reduction cavity 411 being located above, which is more than, is located at lower section
Noise reduction cavity 411 volume, specifically, the transverse width and depth of this two noise reduction cavities 411 remain unchanged, and the noise reduction of top
The vertical width of chamber 411 is more than the vertical width of the noise reduction cavity 411 of lower section.
If the case where including three or three or more noise reduction cavity 411 for a noise reduction cavity group 41, same noise reduction cavity group
The volume size of noise reduction cavity 411 in 41 is along vertically unidirectional variation successively, and the noise reduction cavity 411 in adjacent noise reduction cavity group 41
Volume size change direction it is consistent.
In the present embodiment, noise reduction hole 31 lines up in the horizontal direction, and accordingly, noise reduction cavity group 41 is arranged in the horizontal direction
It embarks on journey, in this way, the whole rectangular distribution in noise reduction hole 31, accordingly, the whole rectangular distribution of noise reduction cavity 411.Also, noise reduction hole 31
It is whole be set on the position of face air inlet 21, better noise reduction is obtained with this.
The driving mechanism 5 that front shroud 4 can be driven to make vertical motion with respect to wind turbine cover board 3, tool are installed on wind turbine cover board 3
Body, which includes push-rod electric machine 51, guide holder 52 and guide rod 53, and push-rod electric machine 51 is mounted on wind turbine cover board 3
On, the output end of push-rod electric machine 51 acts on front shroud 4, and guide holder 52 is mounted on wind turbine cover board 3, and guide rod 53 is mounted on and leads
To on seat 52, the left and right sides of front shroud 4 is mounted on guide rod 53, and front shroud 4 is under the driving of push-rod electric machine 51 along leading
Make vertical motion to bar 53.In order to keep front shroud movement more steady, the guide rod 53 in the present embodiment has four and sets respectively
In four corners of front shroud 4, four ends angle of front shroud 4 is movably arranged on corresponding guide rod 53, and push-rod electric machine 51 is set
In the top of front shroud 4, and the output end of push-rod electric machine 51 and the top of front shroud 4 offset.
According to Helmholz resonance principle, the resonant frequency of each independent noise reduction cavity isC is the velocity of sound, S
For corresponding noise reduction hole area, V is noise reduction cavity volume, and L is the effective neck length in noise reduction hole.It follows that the feelings constant in other parameters
Under condition, noise reduction cavity volume becomes larger, and resonant frequency f reduces, conversely, noise reduction cavity volume becomes smaller, resonant frequency f becomes larger.Utilize conspicuous nurse
Huo Zi resonates noise reduction principle, and the air in air column and noise reduction cavity in noise reduction hole constitutes elastic resonator system, works as fume-exhausting
When the partial noise frequency of machine is identical with the intrinsic frequency of this resonator system, resonance and and hole occur for the air column in noise reduction hole
Severe friction occurs for wall, and friction makes acoustic energy be converted into thermal energy, to achieve the purpose that noise elimination.
As shown in figure 8, when range hood low-grade location is run, air quantity is minimum, and wind speed is minimum, and corresponding wind makes an uproar frequency also most
It is small, at this point, the noise reduction cavity 411 that 31 corresponding volume of noise reduction hole is larger, makes the resonant frequency of noise reduction cavity 411 and the wind under low-grade location make an uproar
Frequency is identical or matches.
As shown in figure 9, 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, making the smaller noise reduction cavity 411 of 31 corresponding volume of noise reduction hole, the resonant frequency of noise reduction cavity 31 and the wind under high tap position is made to make an uproar
Frequency is identical or matches.
Embodiment two：
As shown in Figure 10 and Figure 11, two noise reduction cavities 411 in a noise reduction cavity group 41 of the present embodiment correspond to two not
With the noise reduction hole 31 of size, i.e. a noise reduction cavity group 41 is corresponding with two noise reduction holes 31.By moving up and down front shroud 4,
The larger noise reduction cavity of noise reduction hole corresponding volume that area can be made larger, the smaller noise reduction of the smaller noise reduction hole corresponding volume of area
Chamber, the smaller noise reduction cavity of noise reduction hole corresponding volume that area can also be made larger, the smaller noise reduction hole corresponding volume of area are larger
Noise reduction cavity, to realize two frequency bands synchronization noise reduction.The operation principle of the present embodiment is identical as embodiment one, herein not
Reinflated description.
Claims (9)
1. a kind of noise reducing type range hood, including blower rack (1) and the wind turbine (2) in blower rack, blower rack (1) front side is set
There is wind turbine cover board (3), it is characterised in that：The vertical noise reduction hole (31) being spaced apart successively is provided on the wind turbine cover board (3),
Have a front shroud (4) in the installed in front of wind turbine cover board (3), the rear wall of the front shroud (4) be equipped with it is vertical be sequentially distributed and with
The corresponding noise reduction cavity group (41) in noise reduction hole (31), each noise reduction cavity group (41) includes at least two noise reduction cavities (411), same
The volume size of noise reduction cavity (411) in noise reduction cavity group (41) is along vertically unidirectional variation successively, and adjacent noise reduction cavity group (41)
In noise reduction cavity (411) volume size change direction it is consistent, protecgulum can be driven by being equipped on the wind turbine cover board (3)
Plate makees the driving mechanism (5) of vertical motion with respect to wind turbine cover board.
2. noise reducing type range hood according to claim 1, it is characterised in that：The noise reduction hole (31) is in the horizontal direction
It lines up, accordingly, the noise reduction cavity group (41) lines up in the horizontal direction.
3. noise reducing type range hood according to claim 2, it is characterised in that：The noise reduction hole (31) is rectangular point whole
Cloth is simultaneously set on the position of face air inlet (21), accordingly, the whole rectangular distribution of the noise reduction cavity (411).
4. noise reducing type range hood according to claim 1, it is characterised in that：Difference in the same noise reduction cavity group (41)
The noise reduction hole (31) of the corresponding different area size of noise reduction cavity (411).
5. noise reducing type range hood according to claim 1, it is characterised in that：It is all in the same noise reduction cavity group (41)
The transverse width and depth of noise reduction cavity (411) remain unchanged, and the vertical width of noise reduction cavity (411) changes successively.
6. noise reducing type range hood according to claim 1, it is characterised in that：Each noise reduction cavity group (41) includes two
The noise reduction cavity (411), and the volume for the noise reduction cavity (411) being located above is more than the body of underlying noise reduction cavity (411)
Product.
7. noise reducing type range hood according to claim 1, it is characterised in that：The cross section of the noise reduction cavity (411) is in
Rectangular, the noise reduction hole (31) is circular hole.
8. the noise reducing type range hood according to any claim in claim 1 to 7, it is characterised in that：The drive
Motivation structure (5) includes push-rod electric machine (51), guide holder (52) and guide rod (53), and the push-rod electric machine (51) is mounted on the wind
On cover plate (3), the output end of push-rod electric machine (51) acts on the front shroud (4), and the guide holder (52) is mounted on described
On wind turbine cover board (3), guide rod (53) is mounted on the guide holder (52), and the left and right sides of the front shroud (4) is mounted on
On the guide rod (53), front shroud (4) makees vertical motion under the driving of the push-rod electric machine (51) along guide rod (53).
9. noise reducing type range hood according to claim 8, it is characterised in that：The guide rod (53) has four and divides
Not She Yu the front shroud (4) four corners, four of the front shroud (4) ends angle is movably arranged on corresponding guide rod
(53) on, the push-rod electric machine (51) is set to the top of the front shroud (4), and the output end and front shroud of push-rod electric machine (51)
(4) it offsets at the top of.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820174927.0U CN207907315U (en) | 2018-01-31 | 2018-01-31 | A kind of noise reducing type range hood |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820174927.0U CN207907315U (en) | 2018-01-31 | 2018-01-31 | A kind of noise reducing type range hood |
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| CN207907315U true CN207907315U (en) | 2018-09-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094774A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
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2018
- 2018-01-31 CN CN201820174927.0U patent/CN207907315U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094774A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
| CN110094774B (en) * | 2018-01-31 | 2024-02-20 | 宁波方太厨具有限公司 | Noise-reducing type range hood |
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