CN207317045U - A kind of frequency conversion noise reduction outlet housing of range hood - Google Patents
A kind of frequency conversion noise reduction outlet housing of range hood Download PDFInfo
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- CN207317045U CN207317045U CN201721430957.5U CN201721430957U CN207317045U CN 207317045 U CN207317045 U CN 207317045U CN 201721430957 U CN201721430957 U CN 201721430957U CN 207317045 U CN207317045 U CN 207317045U
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- noise reduction
- partition
- cover
- inner cover
- range hood
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Abstract
A kind of frequency conversion noise reduction outlet housing of range hood, including base and cover body, cover body includes inner cover and outer cover, noise reduction hole is provided with inner cover perisporium, the first partition being spaced apart successively is equipped with the outer wall of inner cover, the second partition being spaced apart successively is equipped with the inner wall of outer cover, the second partition and the spaced distribution of first partition, adjacent first partition, second partition and the adjacent first partition, interior cover outer wall between second partition, outer cover inner wall encloses noise reduction cavity jointly, noise reduction hole is corresponding with noise reduction cavity, being provided with base can drive inner cover and outer cover to carry out relative motion to adjust the driving mechanism of the noise reduction cavity size.The utility model has the advantage of：After driving inner cover to carry out relative motion with outer cover by driving mechanism, the volume size of the corresponding noise reduction cavity in noise reduction hole can be made to produce stepless change, make the resonant frequency of noise reduction cavity and wind that the different stalls of range hood produce frequency of making an uproar is identical or match, so as to fulfill effective noise reduction.
Description
Technical field
A kind of outlet housing of range hood is the utility model is related to, is gone out more particularly, to a kind of frequency conversion noise reduction of range hood
Fan housing.
Background technology
The Chinese way of cooking can produce substantial amounts of oil smoke, for keep kitchen environment cleaning and human body health, range hood into
For one of essential equipment in Modern Family kitchen.Range hood sucks gas in its air inlet in the process of running, via
Fan outlet discharges gas.Existing range hood is generally fitted with outlet housing in fan outlet, and outlet housing has
The effect of gather qi together water conservancy diversion, connection range hood and discharge pipe.The air-flow that wind turbine produces finally is required for converging in outlet housing, this
The air-flow in outlet housing is just set excessively to concentrate, the air motion in cover body produces turbulent flow and makes a noise, and then influences people's
Culinary art experience and health.
Noise caused by outlet housing is flowed through in order to reduce air-flow, people improve the structure of outlet housing.As specially
Profit number is disclosed in the Chinese invention patent of 200810061936.X (Authorization Notice No. is 101294725 B of CN)《With having
The ventilator air outlet cover of source decrease of noise functions》, which includes cover body, cover body have an air outlet and with spiral case outlet air end
The air inlet of mouth connection, the perisporium of cover body is shiny surface, and perisporium has upwardly extended volute tongue by air inlet.Although the outlet housing leads to
Cross after cover body perisporium designs volute tongue, in addition the spiral case outlet air port that can make to be connected with outlet housing is without designing volute tongue, structure
Simplify, and the active noise reduction function of outlet housing is realized using volute tongue, still, which passes through volute tongue noise reduction, noise reduction
Effect is general.The and for example Chinese utility model of Patent No. 201620102678.5 (Authorization Notice No. is 205536022 U of CN)
Disclosed in patent《A kind of outlet housing for range hood》, which includes cover body bottom and cover body head, cover body bottom
Portion is air intake, and cover body head is outlet air end, and multiple through holes are provided with the perisporium on cover body head and make cover body head in part
It is or overall in mesh-structured.Although the outlet housing is by imitating the injection of surrounding air, blending to reach noise reduction during wind turbine air draft
Fruit, still, the noise reduction reached by injection, blending are poor.In addition, the gear change of range hood can make wind make an uproar frequency
Change, and existing noise reduction measure cannot accordingly be adjusted according to wind turbine gear change, can not carry out nothing to noise reduction frequency
Level is adjusted, and noise reduction is not intelligent enough, and user experience is poor.In conclusion need to make into one existing outlet air cover structure
Step is improved.
Utility model content
Technical problem to be solved in the utility model is to be directed to above-mentioned state of the art, there is provided one kind can be according to wind turbine
Gear size carries out noise reduction cavity resonant frequency the frequency conversion noise reduction outlet housing of the range hood of step-less adjustment.
Technical solution is used by the utility model solves above-mentioned technical problem：The frequency conversion noise reduction outlet air of the range hood
Cover, including base and the cover body on base, it is characterised in that：The cover body includes inner cover and outer cover, in the inner cover
Noise reduction hole is provided with perisporium, the first partition being spaced apart successively is equipped with the outer wall of the inner cover, in the outer cover
Wall is equipped with the second partition that is spaced apart successively, the second partition and the spaced distribution of first partition, and adjacent first
Interior cover outer wall, outer cover inner wall between partition plate, second partition and adjacent first partition, the second partition enclose drop jointly
Make an uproar chamber, the noise reduction hole is corresponding with the noise reduction cavity, and being provided with the base can drive inner cover and outer cover to carry out phase
To moving to adjust the driving mechanism of the noise reduction cavity size.
As a preferred embodiment, the bottom of the inner cover is fixed on the base, described to cover on the driving outside
Opposite inner cover makees circumferential movement under the driving of mechanism.
Further preferably, the noise reduction hole is arranged in columns along the axial direction of inner cover, and circumferential direction of each row noise reduction hole along inner cover
It is spaced apart, accordingly, the length direction of the first partition is consistent with the axial direction of inner cover, and all first partitions are along inner cover
Circumferentially-spaced distribution, the length direction of second partition is consistent with the axial direction of outer cover, week of all second partitions along outer cover
To being spaced apart.
Further preferably, the first partition is tablet with second partition and is parallel to each other.
In order to obtain more preferable noise reduction, each column noise reduction hole is uniformly distributed in the circumferentially-spaced of inner cover, accordingly, described
First partition is uniformly distributed in the circumferentially-spaced of inner cover, and the second partition is uniformly distributed in the circumferentially-spaced of outer cover.
In order to obtain more preferable noise reduction, the noise reduction hole for belonging to same column is uniformly distributed along the axially spaced-apart of inner cover.
Further preferably, which has further included outlet air mouth circle, and the air outlet is fixed at the top of the inner cover
On circle, form for upper hopper chute embedded at the top of outer cover, formed on the base for outer in the bottom of the outlet air mouth circle
Cover the gliding groove of bottom insertion.With the above structure, it can make that the mounting structure of inner cover is more firm, and outer cover passes through upper hopper chute
It is more steady with being rotated after gliding groove.
Driving mechanism can have various structures, it is preferable that the driving mechanism includes the electricity being installed on the base
Dynamic push rod, the outer wall lower part of the outer cover have outwardly extending rocking bar, and the rocking bar is connected on the electric pushrod.This
Sample, electric pushrod can drive rocking bar to rotate when working, so as to drive outer cover to be rotated relative to inner cover.
As another preferred solution, the inner cover is fixed on the base, described to cover on the driving mechanism outside
Driving under opposite inner cover axially move.
As the preferred of any of the above-described scheme, the inner cover and outer cover are cylindrical structure.
Compared with prior art, the utility model has the advantage of：The frequency conversion noise reduction outlet housing of the range hood is in inner cover
First partition and outer cover second partition between form noise reduction cavity, the noise reduction hole on inner cover is corresponded with noise reduction cavity, is passed through
After driving mechanism drives inner cover to carry out relative motion with outer cover, the volume size of the corresponding noise reduction cavity in noise reduction hole can be made to produce nothing
Level change, makes the resonant frequency of noise reduction cavity and wind that the different stalls of range hood produce frequency of making an uproar is identical or match, from
And realize effective noise reduction.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model embodiment
Fig. 2 is the perspective exploded view of the utility model embodiment；
Fig. 3 is the structure sectional view of the utility model embodiment；
Fig. 4 is structure diagram of the utility model embodiment when range hood low-grade location is run；
Fig. 5 is the enlarged diagram of part A in Fig. 4；
Fig. 6 is structure diagram of the utility model embodiment when range hood middle gear is run；
Fig. 7 is the enlarged diagram of part B in Fig. 6；
Fig. 8 is structure diagram of the utility model embodiment when range hood high tap position is run；
Fig. 9 is the enlarged diagram of C portion in Fig. 8.
Embodiment
The utility model is described in further detail below in conjunction with attached drawing embodiment.
As shown in Figures 1 to 9, the frequency conversion noise reduction outlet housing of the range hood in the present embodiment includes base 1, inner cover 2, outer
The primary clusterings such as cover 3, outlet air mouth circle 4, driving mechanism 5.Wherein, inner cover 2 and outer cover 3 are cylindrical structure, and inner cover 2 is fixation
Part, the bottom of inner cover 2 are fixed on base 1, and the top of inner cover 2 is fixed in outlet air mouth circle 4 by screw 7；Outer cover 3 is activity
Part, gliding groove is formed on base 1, and upper hopper chute is formed in the bottom of outlet air mouth circle 4, and the bottom of outer cover 3, which is embedded, to glide
In groove, the top of outer cover 3 is embedded in upper hopper chute.In the present embodiment, driving mechanism 5 includes being installed on electronic pushing away on base 1
Bar 51, the outer wall lower part of outer cover 3 have outwardly extending rocking bar 32, and rocking bar 32 is connected on electric pushrod 51.Electric pushrod 51
It can be rotated with drive rocker 32, and then drive outer cover 3 to make circumferential movement with respect to inner cover 2.
In the present embodiment, noise reduction hole 21 is provided with the perisporium of inner cover 2, noise reduction hole 21 is arranged in columns along the axial direction of inner cover 2,
The noise reduction hole 21 for belonging to same column is uniformly distributed along the axially spaced-apart of inner cover 2.And each row noise reduction hole is along the circumferentially-spaced of inner cover 2
It is uniformly distributed.First partition 22, the length direction of first partition 22 and the axial phase one of inner cover 2 are equipped with the outer wall of inner cover 2
Cause, all first partitions 22 are uniformly distributed along the circumferentially-spaced of inner cover 2, and every piece of first partition 22 is corresponding with a row noise reduction hole
21。
Be equipped with the second partition 31 that is spaced apart successively on the inner wall of outer cover 3, the length direction of second partition 31 with it is outer
The axial direction of cover 3 is consistent, and all second partitions 31 are uniformly distributed along the circumferentially-spaced of outer cover 3.Also, second partition 31 and
One partition plate 22 is the tablet that is parallel to each other and is spaced apart, adjacent first partition 22, second partition 31 and this adjacent the
2 outer wall of inner cover, 3 inner wall of outer cover between one partition plate, second partition enclose noise reduction cavity 6 jointly.Each column noise reduction hole 21 is corresponding with
One noise reduction cavity 6.
According to Helmholz resonance principle, the resonant frequency of each independent noise reduction cavity 6 isC is the velocity of sound, S
For the gross area in each column noise reduction hole 21, V is noise reduction cavity volume, and L is 21 effective neck length of noise reduction hole.It follows that in other parameters
In the case of constant, 6 volume of noise reduction cavity becomes larger, and resonant frequency f reduces, conversely, 6 volume of noise reduction cavity diminishes, resonant frequency f becomes
Greatly.Using Helmholz resonance noise reduction principle, the air column in noise reduction hole 21 constitutes elastic resonance with the air in noise reduction cavity 6
System, when the partial noise frequency of range hood is identical with the intrinsic frequency of this resonator system, the air in noise reduction hole 21
Column occurs resonance and severe friction occurs with hole wall, and friction makes acoustic energy be converted into thermal energy, so as to achieve the purpose that noise elimination.
The operation principle of the noise reduction outlet housing is as follows：
During work, drive outer cover 3 to be rotated relative to inner cover 2 by electric pushrod 51, make first partition 22 and second partition 31
Between spacing change, so as to change the volume of noise reduction cavity 6, and then cause the change of resonant frequency.
As shown in Figure 4 and Figure 5, the volume of noise reduction cavity 6 is maximum, at this time, corresponding to the state of range hood low-grade location operation；
As shown in Figure 6 and Figure 7, after outer cover 3 rotates clockwise, the volume of noise reduction cavity 6 diminishes, at this time, corresponding to the centre of range hood
The state of gear operation；As shown in Figure 8 and Figure 9, outer cover 3 further rotates clockwise, and the volume of noise reduction cavity 6 further diminishes,
At this time, the state run corresponding to the high tap position of range hood.In addition, during outer cover 3 rotates clockwise, due to noise reduction cavity
6 volume realizes stepless change, therefore, the stepless frequency conversion noise reduction of the outlet housing can be realized by Rotating outer 3.
Above description is merely a prefered embodiment of the utility model, it is noted that for those of ordinary skill in the art
For, under the premise of the principle of the utility model is not departed from, a variety of remodeling or improvement can be carried out to the utility model, such as,
Inner cover can be fixed on base, the partition plate on partition plate and outer cover on inner cover uses radial direction partition plate, covers on driving machine outside
Opposite inner cover axially moves under the driving of structure, can also realize the stepless frequency conversion noise reduction of outlet housing, these are regarded as this practicality
Within new protection domain.
Claims (9)
1. a kind of frequency conversion noise reduction outlet housing of range hood, including base (1) and the cover body on base, it is characterised in that：
The cover body includes inner cover (2) and outer cover (3), noise reduction hole (21) is provided with the perisporium of the inner cover (2), in the inner cover
(2) outer wall is equipped with the first partition (22) being spaced apart successively, and interval point successively is equipped with the inner wall of the outer cover (3)
The second partition (31) of cloth, the second partition (31) and first partition (22) spaced distribution, adjacent first partition
(22), inner cover (2) outer wall between second partition (31) and adjacent first partition, the second partition, outer cover (3) inner wall are common
With noise reduction cavity (6) is enclosed, the noise reduction hole (21) is corresponding with the noise reduction cavity (6), is provided with the base (1)
Inner cover (2) and outer cover (3) can be driven to carry out relative motion to adjust the driving mechanism (5) of the noise reduction cavity (6) size.
2. the frequency conversion noise reduction outlet housing of range hood according to claim 1, it is characterised in that：The bottom of the inner cover (2)
Portion is fixed on the base (1), and the outer cover (3) opposite inner cover (2) under the driving of the driving mechanism (5) is made circumferential
Movement.
3. the frequency conversion noise reduction outlet housing of range hood according to claim 2, it is characterised in that：Noise reduction hole (21) edge
That the axial direction of inner cover (2) is arranged in columns, and circumferentially-spaced distribution of each row noise reduction hole (21) along inner cover (2), accordingly, described
The length direction of one partition plate (22) is consistent with the axial direction of inner cover (2), and all first partitions (22) are along between the circumferential direction of inner cover (2)
Every distribution, the length direction of second partition (31) is consistent with the axial direction of outer cover (3), and all second partitions (31) are along outer cover
(3) circumferentially-spaced distribution.
4. the frequency conversion noise reduction outlet housing of range hood according to claim 3, it is characterised in that：The first partition (22)
It is tablet and is parallel to each other with second partition (31).
5. the frequency conversion noise reduction outlet housing of range hood according to claim 3, it is characterised in that：Each column noise reduction hole (21) exists
Circumferentially-spaced being uniformly distributed of inner cover (2), accordingly, the first partition (22) inner cover (2) circumferentially-spaced being uniformly distributed,
Circumferentially-spaced being uniformly distributed of the second partition (31) in outer cover (3).
6. the frequency conversion noise reduction outlet housing of range hood according to claim 3, it is characterised in that：Belong to the noise reduction hole of same column
(21) it is uniformly distributed along the axially spaced-apart of inner cover (2).
7. the frequency conversion noise reduction outlet housing of range hood according to claim 2, it is characterised in that：Outlet air mouth circle is further included
(4), it is fixed at the top of the inner cover (2) in the outlet air mouth circle (4), is formed in the bottom of the outlet air mouth circle (4)
For upper hopper chute embedded at the top of outer cover (3), the gliding groove for the insertion of outer cover (3) bottom is formed on the base (1).
8. the frequency conversion noise reduction outlet housing of range hood according to claim 7, it is characterised in that：The driving mechanism
(5) electric pushrod (51) being installed on the base (1) is included, the outer wall lower part of the outer cover (3) is with outwardly extending
Rocking bar (32), the rocking bar (32) are connected on the electric pushrod (51).
9. the frequency conversion noise reduction outlet housing of range hood according to claim 1, it is characterised in that：The inner cover (2) is fixed
On the base (1), the outer cover (3) opposite inner cover (2) under the driving of the driving mechanism (5) axially moves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721430957.5U CN207317045U (en) | 2017-10-31 | 2017-10-31 | A kind of frequency conversion noise reduction outlet housing of range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721430957.5U CN207317045U (en) | 2017-10-31 | 2017-10-31 | A kind of frequency conversion noise reduction outlet housing of range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207317045U true CN207317045U (en) | 2018-05-04 |
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ID=62379402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721430957.5U Active CN207317045U (en) | 2017-10-31 | 2017-10-31 | A kind of frequency conversion noise reduction outlet housing of range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207317045U (en) |
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2017
- 2017-10-31 CN CN201721430957.5U patent/CN207317045U/en active Active
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