CN208090760U - A kind of noise reducing type range hood - Google Patents
A kind of noise reducing type range hood Download PDFInfo
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- CN208090760U CN208090760U CN201820343391.0U CN201820343391U CN208090760U CN 208090760 U CN208090760 U CN 208090760U CN 201820343391 U CN201820343391 U CN 201820343391U CN 208090760 U CN208090760 U CN 208090760U
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- range hood
- side panel
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Abstract
A kind of noise reducing type range hood, denoising device is installed on wind turbine cover board, denoising device includes back side panel and front side board, back side panel and front side board are in the form of annular discs, the first partition in spoke-like distribution is equipped on back side panel leading flank, noise reduction hole is provided in disk between adjacent first partition, the second partition in spoke-like distribution is equipped on the trailing flank of front side board, second partition is set between two pieces of adjacent first partitions, noise reduction hole is equipped between second partition and adjacent first partition, and, front side board and back side panel can make circumferentially opposed movement under the driving of driving mechanism.When the front side board and back side panel of the range hood make all tropisms to movement, noise reduction cavity volume between first partition and second partition changes, according to Helmholz resonance principle, the wind that noise reduction cavity resonant frequency is generated with range hood different stalls frequency of making an uproar can be made identical or match, also, the stepless noise reduction of range hood may be implemented by the step-less adjustment of noise reduction cavity volume.
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 middle promulgated by the State Council of Patent No. 201310627547.X (Authorization Notice No. is CN 103697512B)
Disclosed in bright patent《A kind of silence exhauster for removing cooking fumes》, advance tuyere position setting sound-absorbing of the range hood in face spiral case
Micropore is arranged on sound-absorbing kuppe, and the rear panel in sound-absorbing kuppe face advance air port is obliquely installed for kuppe, makes it
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 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 tilts
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 for the frequency that absorbs sound, 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, 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 one kind being capable of stepless-adjustment
Save the noise reducing type range hood of 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, and noise reduction dress is equipped on the wind turbine cover board
It sets, it is characterised in that：The denoising device includes mutually matched back side panel and front side board, and the back side panel and front side board are in
It is discoid, the first partition in spoke-like distribution, the disk between adjacent first partition are equipped on the leading flank of back side panel
On be provided with noise reduction hole, on the trailing flank of front side board be equipped in spoke-like distribution second partition, the second partition be set to two
Between the adjacent first partition of block, between second partition and adjacent first partition be equipped with the noise reduction hole, also, it is described before
Side plate and back side panel can make circumferentially opposed movement under the driving of driving mechanism.
In order to improve noise reduction, the installation window opposite with air inlet is provided on the wind turbine cover board, it is described
Back side panel and front side board are set to position corresponding with installation window.
In order to realize the uniform noise reduction of denoising device, the angle between two pieces of adjacent first partitions and two pieces adjacent
Corner dimension between two partition boards is equal.
In order to improve the adjustable range of noise reduction frequency as much as possible, the noise reduction in disk between two pieces of adjacent first partitions
Hole forms a line along radial, and the row noise reduction hole is adjacent to one of first partition.
Preferably, the back side panel is movable plate, and the front side board is fixed plate, and the back side panel is in driving mechanism
Driving under opposite front side board make circumferential movement.
As a kind of preferred embodiment that back side panel is movable plate, the driving mechanism includes the electricity being set on front side of front side board
Machine, screw rod and gear, the screw rod are fixed on the output shaft of the motor, and the gear is meshed with the screw rod, preceding
The center of side plate is provided with center through hole, and the center of the back side panel is equipped with installation axle, and the installation axle advances through the center
Through-hole simultaneously stretches out in front side board, and the gear is fixed on the front end of the installation axle.
As another preferred embodiment that back side panel is movable plate, the driving mechanism includes motor and connecting rod, the electricity
Machine is mounted on the front side of the front side board, and the outer end of the connecting rod is fixed on the outer periphery of the back side panel, the connecting rod
Inner end is mounted on the output shaft of the motor.
As another preferred embodiment that back side panel is movable plate, the driving mechanism includes motor, in the front side board
Center is provided with central through hole, and the output shaft of motor backs through the central through hole and is fixed on the center of the back side panel.
Further preferably, the back side panel is fixed plate, and the front side board is movable plate, and the front side board is in driving machine
Opposite posterior plate makees circumferential movement under the driving of structure.
As the preferred of any of the above-described scheme, which further includes having exhaust fume collecting hood, and the exhaust fume collecting hood is mounted on wind turbine
The lower section of frame, exhaust fume collecting hood have the air inlet being connected with air inlet.
Compared with prior art, the utility model has the advantage of：The front side board and back side panel of the noise reducing type range hood
When making all tropisms to movement, the angle between first partition and second partition can be made to change, so make first partition with
Noise reduction cavity volume between second partition changes, and according to Helmholz resonance principle, can make the resonant frequency of noise reduction cavity
It is identical or match as the wind that the different stalls of range hood generate frequency of making an uproar, also, pass through the stepless-adjustment of noise reduction cavity volume
The stepless noise reduction of range hood may be implemented in section.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model embodiment one；
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 perspective exploded view of one denoising device of the utility model embodiment；
Fig. 5 is structural schematic diagram of the utility model embodiment one under the smaller state of noise reduction cavity volume；
Fig. 6 is structural schematic diagram of the utility model embodiment one under the larger state of noise reduction cavity volume；
Fig. 7 is the mounting structure schematic diagram of the driving mechanism of the utility model embodiment two；
Fig. 8 is the perspective exploded view of Fig. 7；
Fig. 9 is the mounting structure schematic diagram of the driving mechanism of the utility model embodiment three.
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 6, 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, denoising device 4 is installed on wind turbine cover board 3, denoising device 4 includes 41 He of mutually matched back side panel
Front side board 42, is provided with the installation window 31 opposite with air inlet 21 on wind turbine cover board 3, and back side panel 41 and front side board 42 are set to
Position corresponding with installation window 31.1 lower section of blower rack is equipped with exhaust fume collecting hood 6, and exhaust fume collecting hood 6 has to be connected with air inlet 21
Logical air inlet.
In the present embodiment, back side panel 41 and front side board 42 are in the form of annular discs, and it is in spoke to be equipped on the leading flank of back side panel 41
The first partition 411 of strip distribution is provided with noise reduction hole 412,412 edge of noise reduction hole in the disk between adjacent first partition 411
It radial direction to form a line, and the row noise reduction hole is adjacent to one of first partition 411.It is equipped on the trailing flank of front side board 42 and is in
The second partition 421 of spoke-like distribution, the angle between two pieces of adjacent first partitions 411 and two pieces of adjacent second partitions
Corner dimension between 421 is equal, and second partition 421 is set between two pieces of adjacent first partitions 411 so that adjacent pair
Space between first partition 411 and second partition 421 forms noise reduction cavity 43, and each noise reduction cavity 43 is corresponding with a row noise reduction hole
412, form Helmholz resonance chamber.
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 resonator system, works as range hood
Partial noise frequency it is identical with the intrinsic frequency of this resonator system when, resonance and and hole wall occur for air column in noise reduction hole
Severe friction occurs, friction makes acoustic energy be converted into thermal energy, to achieve the purpose that noise elimination.It follows that can be dropped by changing
Make an uproar chamber volume size come control sound absorption peak value resonant frequency.
In the present embodiment, back side panel 41 is movable plate, and front side board 42 is fixed plate, driving of the back side panel 41 in driving mechanism
Lower opposite front side board 42 makees circumferential movement.Specifically, driving mechanism includes being set to motor 51,52 and of screw rod of 42 front side of front side board
Gear 53, screw rod 52 are fixed on the output shaft of motor 51, and gear 53 is meshed with screw rod 52, are provided in the center of front side board 42
The center of center through hole 422, back side panel 41 is equipped with installation axle 413, and installation axle 413 advances through center through hole 422 and stretches out in
Front side board 42, gear 53 are fixed on the front end of installation axle 413, and gear 53 is rotated synchronously with installation axle 413.
When work, the opposite front side board 42 under the driving of motor 41 of back side panel 41 rotates, thus to the volume of noise reduction cavity 43 into
Row step-less adjustment.As shown in figure 5, the angle α between first partition 411 and second partition 421 is smaller, at this point, corresponding noise reduction
43 volume of chamber is smaller, and the resonant frequency of noise reduction cavity 43 is larger, which is suitable for range hood high tap position；As shown in fig. 6, first
Angle β between partition board 411 and second partition 421 is larger, at this point, 43 volume of corresponding noise reduction cavity is larger, noise reduction cavity 43 is total to
Vibration frequency is smaller, which is suitable for range hood low-grade location.
Embodiment two：
As shown in Figure 7 and Figure 8, the driving mechanism in the present embodiment includes motor 51 and connecting rod 54, before motor 51 is mounted on
The outer end of the front side of side plate 42, connecting rod 54 is fixed on the outer periphery of back side panel 41, and the inner end of connecting rod 54 is mounted on motor 51
On output shaft.When work, motor 51 drives back side panel 41 to rotate by connecting rod 54.Its operation principle is identical as embodiment one,
This not reinflated description.
Embodiment three：
As shown in figure 9, driving mechanism includes motor 51, central through hole 423 is provided in 42 center of front side board, motor 51 it is defeated
Shaft passes through central through hole 423 and is fixed on the center of back side panel 41.When work, the back side panel 41 that motor 51 is directly gone rotates,
Its operation principle 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), denoising device (4) be installed on the wind turbine cover board (3), it is characterised in that：The denoising device (4)
Including mutually matched back side panel (41) and front side board (42), the back side panel (41) and front side board (42) are in the form of annular discs,
The leading flank of back side panel (41) is equipped with the first partition (411) in spoke-like distribution, between adjacent first partition (411)
It is provided with noise reduction hole (412) in disk, the second partition (421) in spoke-like distribution is equipped on the trailing flank of front side board (42),
The second partition (421) is set between two pieces of adjacent first partitions (411), second partition (421) with adjacent first every
The noise reduction hole (412) is equipped between plate (411), also, the front side board (42) and back side panel (41) are in driving mechanism (5)
Driving under can make circumferentially opposed movement.
2. noise reducing type range hood according to claim 1, it is characterised in that：Be provided on the wind turbine cover board (3) with
The opposite installation window (31) of air inlet (21), the back side panel (41) and front side board (42) are set to and installation window (31) phase
Corresponding position.
3. noise reducing type range hood according to claim 1, it is characterised in that：Two pieces of adjacent first partitions (411) it
Between angle it is equal with the corner dimension between two pieces of adjacent second partitions (421).
4. noise reducing type range hood according to claim 3, it is characterised in that：Between two pieces of adjacent first partitions (411)
Disk on noise reduction hole (412) form a line along radial, and the row noise reduction hole is adjacent to one of first partition (411).
5. noise reducing type range hood according to claim 1, it is characterised in that：The back side panel (41) is movable plate,
The front side board (42) is fixed plate, and the back side panel (41) opposite front side board (42) under the driving of driving mechanism is made circumferential
Movement.
6. noise reducing type range hood according to claim 5, it is characterised in that：The driving mechanism (5) includes before being set to
Motor (51), screw rod (52) and gear (53), the screw rod (52) on front side of side plate are fixed on the output shaft of the motor (51)
On, the gear (53) is meshed with the screw rod (52), and center through hole (422) is provided in the center of front side board (42), described
The center of back side panel (41) is equipped with installation axle (413), and the installation axle (413) advances through the center through hole (422) and stretches
For front side board (42), the gear (53) is fixed on the front end of the installation axle (413).
7. noise reducing type range hood according to claim 5, it is characterised in that：The driving mechanism (5) includes motor
(51) and connecting rod (54), the motor (51) are mounted on the front side of the front side board (42), and the outer end of the connecting rod (54) is fixed
In the rear on the outer periphery of side plate (41), the inner end of the connecting rod (54) is mounted on the output shaft of the motor (51).
8. noise reducing type range hood according to claim 5, it is characterised in that：The driving mechanism (5) includes motor
(51), it is provided with central through hole (423) in the front side board (42) center, the output shaft of motor (51) backs through the center and leads to
Hole (423) and the center for being fixed on the back side panel (41).
9. noise reducing type range hood according to claim 1, it is characterised in that：The back side panel (41) is fixed plate,
The front side board (42) is movable plate, and the front side board (42) opposite posterior plate (41) under the driving of driving mechanism makees circumferential fortune
It is dynamic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820343391.0U CN208090760U (en) | 2018-03-13 | 2018-03-13 | A kind of noise reducing type range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820343391.0U CN208090760U (en) | 2018-03-13 | 2018-03-13 | A kind of noise reducing type range hood |
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| Publication Number | Publication Date |
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| CN208090760U true CN208090760U (en) | 2018-11-13 |
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ID=64062530
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820343391.0U Active CN208090760U (en) | 2018-03-13 | 2018-03-13 | A kind of noise reducing type range hood |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005645A (en) * | 2019-04-18 | 2019-07-12 | 宁波方太厨具有限公司 | A kind of noise reducing type centrifugal fan |
| CN110274275A (en) * | 2018-03-13 | 2019-09-24 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
-
2018
- 2018-03-13 CN CN201820343391.0U patent/CN208090760U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274275A (en) * | 2018-03-13 | 2019-09-24 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
| CN110274275B (en) * | 2018-03-13 | 2024-02-20 | 宁波方太厨具有限公司 | Noise-reducing type range hood |
| CN110005645A (en) * | 2019-04-18 | 2019-07-12 | 宁波方太厨具有限公司 | A kind of noise reducing type centrifugal fan |
| CN110005645B (en) * | 2019-04-18 | 2024-01-16 | 宁波方太厨具有限公司 | Noise reduction type centrifugal fan |
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