CN207317047U - 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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- CN207317047U CN207317047U CN201721433913.8U CN201721433913U CN207317047U CN 207317047 U CN207317047 U CN 207317047U CN 201721433913 U CN201721433913 U CN 201721433913U CN 207317047 U CN207317047 U CN 207317047U
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- noise reduction
- baffle
- cover
- range hood
- frequency conversion
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Abstract
A kind of frequency conversion noise reduction outlet housing of range hood, including pedestal, inner cover and outer cover, noise reduction hole is provided with inner cover perisporium, the first barrier for circumferentially setting and being spaced apart up and down is equipped with interior cover outer wall, the second baffle being spaced apart up and down is equipped with outer cover inner wall, second baffle is mutually spaced apart up and down with the first baffle, formed and the corresponding noise reduction cavity in noise reduction hole between adjacent the first baffle and the second baffle, one of them in outer cover and inner cover is covered to be fixed, another is movable guard, the elastic component for making movable guard maintain the trend of moving downward is installed on movable guard, movable guard can be moved up and down under the action of range hood exit flow and elastic component to adjust the spacing between the first baffle and the second baffle.The noise reduction outlet air outlet housing can be moved up and down to adjust the spacing between the first baffle and the second baffle, so as to fulfill the adaptive stepless frequency conversion noise reduction of outlet housing in the cooperation of air outlet air-flow and elastic component.
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 CN 101294725B)《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 be different according to wind turbine gear
Adaptive step-less adjustment is carried out, noise reduction is not intelligent enough, and user experience is poor.In conclusion need to existing outlet air
Cover structure is further 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 adaptive 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 pedestal and the cover body on pedestal, 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 barrier for circumferentially setting and being spaced apart up and down is equipped with the outer wall of the inner cover,
The second baffle for circumferentially setting and being spaced apart up and down, second baffle and first are equipped with the inner wall of the outer cover
Baffle is mutually spaced apart up and down, between the first adjacent baffle, the second baffle and the first adjacent baffle, second baffle
Interior cover outer wall, outer cover inner wall enclose noise reduction cavity jointly, the noise reduction hole is corresponding with the noise reduction cavity, the outer cover and
One of them in inner cover is covered to be fixed, another is movable guard, and being provided with movable guard makes movable guard maintain downward fortune
The elastic component of dynamic trend, the movable guard can be relatively fixed cover under the action of range hood exit flow and move up, and
It can be moved up and down under the action of exit flow and elastic component to adjust the spacing between first baffle and the second baffle.
As a preferred embodiment, the inner cover covers to be fixed, and the outer cover is movable guard.It is of course also possible to adopt
It is movable guard with inner cover, outer cover is the fixed structure covered.
Preferably, which has further included outlet air mouth circle, and the bottom of the inner cover is fixed on pedestal, the top of inner cover
Be fixed in outlet air mouth circle, guide holder be equipped with the lateral wall of the outer cover, on the guide holder activity be equipped with vertically
The guide rod of setting, guide rod are supported between outlet air mouth circle and pedestal, and the elastic component is the bullet being arranged on the guide bar
Spring, the spring are supported and are located between outlet air mouth circle and the upper surface of guide holder.
For the ease of installation, the outer cover includes the first case and the second case of split docking, in first case
With the guide holder is mounted on the lateral wall of the second case.Also, it is respectively provided with and leads on the first case and the second case
To seat, moving up and down for outer cover can be made more steady.
In order to make to cover under the action of range hood exit flow and can move up outside, it is provided with the top of the outer cover
Relocation mechanism, range hood exit flow drive outer cover to move up by the relocation mechanism.
Relocation mechanism can have various structures, it is preferable that the relocation mechanism includes the gentle kickboard of connecting rod, the connecting rod
It is fixed on across at the both ends at the top of the inner cover, connecting rod on the outer cover, the air supporting plate is installed on the middle part of connecting rod.
In order to make exit flow more uniformly act on air supporting plate, the air supporting plate level is set, the vertical throwing of air supporting plate
Shadow falls into the central area of the inner cover.
In order to obtain more preferable noise reduction, first baffle and the second baffle are horizontally disposed.
In order to obtain more preferable noise reduction, the noise reduction hole is arranged in columns along the axial direction of inner cover, belongs to the drop of same row
Hole of making an uproar is uniformly distributed in the axially spaced-apart of inner cover, also, each column noise reduction hole is uniformly distributed in the circumferentially-spaced of inner cover, accordingly,
First baffle and the second baffle are spaced and are uniformly distributed.
As the preferred of any of the above-described scheme, the uniform cylindrical structure of inner cover and outer cover.
Compared with prior art, the utility model has the advantage of：The inner cover of the self-adapting frequency conversion noise reduction outlet housing and outer
It is that fixation is covered, another is movable guard to have one in cover, and movable guard can be relatively fixed under air outlet for kitchen ventilator airflow function
Cover moves up, and can be moved up and down by the cooperation of the elastic component on movable guard with adjust the first baffle and second every
Spacing between shelves, so that noise reduction hole corresponds to the noise reduction cavity of respective volume under the working status of range hood different stalls,
And the volume of noise reduction cavity can carry out step-less adjustment, according to Helmholz resonance principle, can make the resonant frequency of noise reduction cavity with
The wind that the different stalls of range hood produce frequency of making an uproar is identical or match, so as to fulfill the adaptive stepless frequency conversion of outlet housing
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 side view of the utility model embodiment；
Fig. 4 is structure sectional view 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 sectional view of the utility model embodiment when range hood high tap position is run；
Fig. 7 is the enlarged diagram of part B in Fig. 6.
Embodiment
The utility model is described in further detail below in conjunction with attached drawing embodiment.
As shown in Figure 1 to Figure 3, the frequency conversion noise reduction outlet housing of the range hood in the present embodiment includes pedestal 1, inner cover 2, outer
Cover 3 and the grade primary clustering of outlet air mouth circle 4.
Wherein, inner cover 2 covers to be fixed, and the bottom of inner cover 2 is fixed on pedestal 1, and the top of inner cover 2 is fixed on outlet air mouth circle
On 4.Inner cover 2 is in cylindrical structure, and noise reduction hole 21 is provided with the perisporium of inner cover 2, and noise reduction hole 21 is lined up along the axial direction of inner cover 2
Row, the noise reduction hole 21 for belonging to same row is uniformly distributed in the axially spaced-apart of inner cover 2, also, each column noise reduction hole 21 is in the week of inner cover 2
It is uniformly distributed to interval.It is equipped with and circumferentially sets and between the upper and lower every equally distributed first barrier 22 on the outer wall of inner cover 2,
First baffle 22 is horizontally disposed.
Outer cover 3 is in cylindrical structure, and the second baffle 31 circumferentially set, the second baffle are equipped with the inner wall of outer cover 3
31 horizontal distributions and between the upper and lower every being uniformly distributed.Second baffle 31 is mutually spaced apart up and down with the first baffle 22, and adjacent the
2 outer wall of inner cover, 3 inner wall of outer cover between one baffle 22, the second baffle 31 and the first adjacent baffle, second baffle is common
Enclose noise reduction cavity 5.Noise reduction hole 31 on inner cover 2 is corresponding with noise reduction cavity 5, also, corresponds to together with the noise reduction hole 21 of a line
One noise reduction cavity 5.
Outer cover 3 is movable guard, and the opposite inner cover 2 of the energy of outer cover 3 moves up and down.It is equipped with and is oriented on the lateral wall of outer cover 3
Seat 6, movable on guide holder 6 to be equipped with vertically arranged guide rod 7, guide rod 7 is supported between outlet air mouth circle 4 and pedestal 1,
Spring 8 is arranged with guide rod 7, the elasticity of spring 8, which is supported, to be located between the upper surface of outlet air mouth circle 4 and guide holder 6, so that outside
Cover 3 maintains the trend moved downward.Spring 8 can use conventional mechanical spring, can also use gas spring and minute-pressure spring
Deng other springs.In the present embodiment, for the ease of installation, outer cover 3 includes the first case 3a and the second case 3b of split docking,
Guide holder 6 is mounted on the lateral wall of the first case 3a and the second case 3b.
In addition, being provided with relocation mechanism 9 at the top of outer cover 3, range hood exit flow drives outer cover by relocation mechanism 3
3 move up.In the present embodiment, relocation mechanism 9 includes the gentle kickboard 92 of connecting rod 91, and connecting rod 91 is across in the top of inner cover 2, company
The both ends of bar 91 are fixed on outer cover 3, and air supporting plate 92 is installed on the middle part of connecting rod 91.In order to make 92 stress of air supporting plate more equal
Even, air supporting plate 92 is horizontally disposed, and the vertical projection of air supporting plate 92 is fallen into the central area of inner cover.
The operation principle of the adaptive stepless frequency conversion noise reduction outlet housing is as follows：
Spring 8 is downward to the active force of outer cover 3, and exit flow is upward to the active force of outer cover 3, and outer cover 3 can work off one's feeling vent one's spleen
Moved up and down under the action of stream and spring 8 to adjust the spacing between the first baffle 22 and the second baffle 31, and then change noise reduction
The volume size of chamber 5, makes noise reduction hole 21 correspond to the noise reduction cavity 5 of respective volume under the working status of range hood different stalls.
As shown in Figure 4 and Figure 5, when range hood is in low-grade location, gas flow is smaller, and exit flow is to outer cover 3
Active force is smaller, and outer cover 3 is in lower position under the action of exit flow and spring 8, at this time, the first baffle 22 and second every
31 spacing of shelves are larger, and 5 volume of noise reduction cavity corresponding to noise reduction hole 21 is larger.
As shown in Figure 6 and Figure 7, when range hood is in high tap position, gas flow is larger, and exit flow is to outer cover 3
Active force is larger, and outer cover 3 is in higher position under the action of exit flow and spring 8, at this time, the first baffle 22 and second every
31 spacing of shelves are larger, and corresponding 5 volume of noise reduction cavity in noise reduction hole 21 is larger.
According to Helmholz resonance principle, the resonant frequency of each independent noise reduction cavity 5 isC is the velocity of sound, S
For corresponding 21 area of noise reduction hole, V is noise reduction cavity volume, and L is 21 effective neck length of noise reduction hole.It is it follows that constant in other parameters
In the case of, 5 volume of noise reduction cavity becomes larger, and resonant frequency f reduces, conversely, 5 volume of noise reduction cavity diminishes, resonant frequency f becomes larger.Profit
With Helmholz resonance noise reduction principle, the air column in noise reduction hole 21 constitutes elastic resonator system with the air in noise reduction cavity 5,
When the partial noise frequency of range hood is identical with the intrinsic frequency of this resonator system, the air column in noise reduction hole 21 occurs
Resonate and severe friction occurs with hole wall, friction makes acoustic energy be converted into thermal energy, so as to achieve the purpose that noise elimination.
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, these are equal
It is considered as within the scope of protection of the utility model.
Claims (9)
1. a kind of frequency conversion noise reduction outlet housing of range hood, including pedestal (1) and the cover body on pedestal (1), its feature exist
In：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), described interior
The outer wall of cover (2) is equipped with the first barrier (22) for circumferentially setting and being spaced apart up and down, the inner wall in the outer cover (3)
It is equipped with the second baffle (31) for circumferentially setting and being spaced apart up and down, second baffle (31) and the first baffle (22)
Mutually it is spaced apart up and down, adjacent the first baffle (22), the second baffle (31) and the first adjacent baffle, second baffle
Between inner cover (2) outer wall, outer cover (3) inner wall enclose noise reduction cavity (5) jointly, the noise reduction hole (21) and the noise reduction cavity
(5) corresponding, one of them in the outer cover (3) and inner cover (2) is covered to be fixed, another is movable guard, on movable guard
The elastic component for making movable guard maintain the trend of moving downward is installed, the movable guard can be in the effect of range hood exit flow
Under be relatively fixed cover and move up, and can be moved up and down under the action of exit flow and elastic component to adjust first baffle
(22) spacing between the second baffle (31).
2. 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 cover, the outer cover (3) is movable guard.
3. 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), the bottom of the inner cover (2) is fixed on pedestal (1), is fixed at the top of inner cover (2) in outlet air mouth circle (4), described
The lateral wall of outer cover (3) is equipped with guide holder (6), movable on the guide holder (6) to be equipped with vertically arranged guide rod
(7), guide rod (7) is supported between outlet air mouth circle (4) and pedestal (1), and the elastic component is the bullet being arranged on the guide bar
Spring (8), spring (8) elasticity, which is supported, to be located between the upper surface of outlet air mouth circle (4) and guide holder (6).
4. the frequency conversion noise reduction outlet housing of range hood according to claim 3, it is characterised in that：The outer cover (3) includes
The first case (3a) and the second case (3b) of split docking, in first case (3a) and the lateral wall of the second case (3b)
On be mounted on the guide holder (6).
5. the frequency conversion noise reduction outlet housing of range hood according to claim 2, it is characterised in that：In the outer cover (3)
Top is provided with relocation mechanism (9), and range hood exit flow drives outer cover (3) to move up by the relocation mechanism (9).
6. the frequency conversion noise reduction outlet housing of range hood according to claim 5, it is characterised in that：The relocation mechanism
(9) connecting rod (91) gentle kickboard (92) is included, the connecting rod (91) is across at the top of the inner cover (2), and the two of connecting rod (91)
End is fixed on the outer cover (3), and the air supporting plate (92) is installed on the middle part of connecting rod (91).
7. the frequency conversion noise reduction outlet housing of range hood according to claim 6, it is characterised in that：Air supporting plate (92) water
Flat to set, the vertical projection of air supporting plate (92) falls into the central area of the inner cover (2).
8. the frequency conversion noise reduction outlet housing of range hood according to claim 1, it is characterised in that：First baffle (22)
It is horizontally disposed with the second baffle (31).
9. the frequency conversion noise reduction outlet housing of range hood according to claim 1, it is characterised in that：Noise reduction hole (21) edge
That the axial direction of inner cover (2) is arranged in columns, the noise reduction hole (21) for belonging to same row is uniformly distributed in the axially spaced-apart of inner cover (2), also,
Each column noise reduction hole (21) inner cover (2) circumferentially-spaced being uniformly distributed, accordingly, first baffle (22) and the second baffle
(31) interval is uniformly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721433913.8U CN207317047U (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 |
|---|---|---|---|
| CN201721433913.8U CN207317047U (en) | 2017-10-31 | 2017-10-31 | A kind of frequency conversion noise reduction outlet housing of range hood |
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| Publication Number | Publication Date |
|---|---|
| CN207317047U true CN207317047U (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721433913.8U Active CN207317047U (en) | 2017-10-31 | 2017-10-31 | A kind of frequency conversion noise reduction outlet housing of range hood |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109330395A (en) * | 2018-10-23 | 2019-02-15 | 李潇 | Roasting food method |
| CN110762576A (en) * | 2019-11-04 | 2020-02-07 | 广州视源电子科技股份有限公司 | Noise reduction method and device for range hood, range hood and storage medium |
-
2017
- 2017-10-31 CN CN201721433913.8U patent/CN207317047U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109330395A (en) * | 2018-10-23 | 2019-02-15 | 李潇 | Roasting food method |
| CN109330395B (en) * | 2018-10-23 | 2021-03-09 | 湖南湘笙和食品有限公司 | Food baking method |
| CN110762576A (en) * | 2019-11-04 | 2020-02-07 | 广州视源电子科技股份有限公司 | Noise reduction method and device for range hood, range hood and storage medium |
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