CN208090761U - A kind of noise reducing type range hood - Google Patents
A kind of noise reducing type range hood Download PDFInfo
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- CN208090761U CN208090761U CN201820343394.4U CN201820343394U CN208090761U CN 208090761 U CN208090761 U CN 208090761U CN 201820343394 U CN201820343394 U CN 201820343394U CN 208090761 U CN208090761 U CN 208090761U
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- orifice plate
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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, denoising device is installed on wind turbine cover board, denoising device includes noise reduction orifice plate, the gentle kickboard of front shroud, noise reduction hole is provided on noise reduction orifice plate, front shroud is set to the front side of noise reduction orifice plate, and it is formed with noise reduction cavity between noise reduction orifice plate and front shroud, it is formed with air intake passage between noise reduction orifice plate and air inlet, air supporting plate is set in air intake passage, air supporting plate can drive noise reduction orifice plate and front shroud to perform relative motion to adjust the volume size of noise reduction cavity under the gas shock in air intake passage.The air supporting plate that the noise reducing type range hood is arranged in air intake passage can drive noise reduction orifice plate and front shroud to perform relative motion under airflow function, to change the volume size of noise reduction cavity, and then the wind for making the resonant frequency of noise reduction cavity be generated with range hood different stalls is made an uproar frequency Auto-matching, to realize that the adaptive stepless frequency conversion noise reduction of range hood, noise reduction are even more ideal.
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 103697512 B of CN)
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
The noise reduction measure of existing range hood cannot accordingly be adjusted according to wind turbine gear change, can not be different according to wind turbine gear
Carry out adaptive step-less adjustment, noise reduction not smart enoughization, user experience is poor.In conclusion needing to existing fume-exhausting
The denoising structure of machine is further improved.
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 can be according to wind
The different gear of machine carrys out the noise reducing type range hood of adaptive step-less 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, and noise reduction dress is equipped on the wind turbine cover board
It sets, it is characterised in that：The denoising device includes noise reduction orifice plate, the gentle kickboard of front shroud, and drop is provided on the noise reduction orifice plate
It makes an uproar hole, the front shroud is set to the front side of noise reduction orifice plate, and is formed with noise reduction cavity between the noise reduction orifice plate and front shroud, in institute
It states and is formed with air intake passage between noise reduction orifice plate and air inlet, the air supporting plate is set in the air intake passage, the gas
The noise reduction orifice plate and front shroud can be driven to perform relative motion to adjust under gas shock of the kickboard in the air intake passage
State the volume size of noise reduction cavity.
Preferably, the noise reduction orifice plate be fixed plate, the front shroud be movable plate, the air supporting plate be connected to it is described before
On cover board.It is of course also possible to which noise reduction orifice plate is designed to movable plate, and front shroud is designed to fixed plate, if meet this two
The volume size of noise reduction cavity can be changed after person's relative motion.
Noise reduction orifice plate, front shroud and air supporting plate can be there are many mounting structures, it is preferable that are opened on the wind turbine cover board
There are installation window compatible with the noise reduction orifice plate size, the noise reduction orifice plate to be mounted on the installation window, the installation window
The right and left along being respectively forwardly extended with baffle, the upper edge of the front shroud is hinged with upper junction plate, the front shroud
Lower edge is hinged with lower connecting plate, and the left and right ends of the upper junction plate and lower connecting plate are respectively articulated with the baffle of respective side
On, the noise reduction orifice plate, front shroud, baffle, upper junction plate and lower connecting plate enclose the noise reduction cavity, the air supporting jointly
The left and right ends of plate are extended with forward air supporting plate connecting rod, and the front end of the air supporting plate connecting rod is articulated with the front shroud
On.In this way, when air supporting plate is flipped up under airflow function, air supporting plate connecting rod rotates down therewith, and then drives front shroud
It is moved to the back lower place, so that the spacing between front shroud and noise reduction orifice plate is become smaller, and then the volume of noise reduction cavity is made to become smaller.
Further preferably, the air supporting plate is in a strip shape and is transversely and horizontally set rear side in the noise reduction orifice plate, the gas
Kickboard connecting rod stretches into forward in the noise reduction cavity, and the front end of air supporting plate connecting rod is hinged on the left and right sides of the front shroud.
In this way, air supporting plate can be acted on uniformly by air-flow, more stably front shroud can be driven to move.
In order to smoothly be resetted when enabling air supporting plate not by airflow function, the left and right sides in air supporting plate forward position respectively to
It is extended with shaft outside, is provided with shaft mounting hole in the corresponding position of the baffle, the outer end of the shaft passes through corresponding shaft
Mounting hole simultaneously stretches out in outside baffle, and the torsional spring for making air supporting plate maintain the trend of rotating down is equipped in the outer end of the shaft.
When work, air supporting plate is rotated around shaft.
Further preferably, the strip groove of horizontal distribution, the air supporting plate are formed in the rear surface of the noise reduction orifice plate
Rear portion be set to the strip groove in.
Further preferably, the lower edges of the noise reduction orifice plate, which have, is used for mutually assembling with the lower edges of the installation window
Installation step, the rear surface of the rear surface of the noise reduction orifice plate and the wind turbine cover board is on same plane.
Under the air supporting the plate not original state by airflow acting force, the upper junction plate, lower connecting plate and air supporting
Plate connecting rod is in horizontal position, and the air supporting plate tilts obliquely from front to back.In this way, noise reduction cavity under original state
Volume is maximum, and becoming larger with air-flow velocity, the volume of noise reduction cavity taper into.
In order to make air supporting plate stress preferably and it is smaller to the influence of air duct flow field simultaneously, the air supporting plate be set to wind turbine into
The center line in air port is center line and between the upper and lower away from the region for air inlet radius value.
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 reduction orifice plate and protecgulum of the noise reducing type range hood
Noise reduction cavity is formed between plate, the air supporting plate being arranged in air intake passage can drive noise reduction orifice plate and front shroud to make under airflow function
Relative motion to change the volume size of noise reduction cavity, and then makes the resonant frequency of noise reduction cavity and the different stalls of range hood produce
Raw wind is made an uproar frequency Auto-matching, to realize that the adaptive stepless frequency conversion noise reduction of range hood, noise reduction are even more ideal.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is the structure sectional view of the utility model embodiment；
Fig. 3 is the mounting structure schematic diagram of the denoising device of the utility model embodiment；
Fig. 4 is the enlarged diagram of part B in Fig. 3；
Fig. 5 is the decomposition diagram of the denoising device mounting structure of the utility model embodiment；
Structural schematic diagram when Fig. 6 is the noise reduction cavity volume maximum of the utility model embodiment；
Fig. 7 is the structural schematic diagram when noise reduction cavity volume of the utility model embodiment becomes smaller；
Structural schematic diagram when Fig. 8 is the noise reduction cavity volume smaller of the utility model embodiment.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing embodiment.
As shown in Figures 1 to 5, 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 3.1 lower section of blower rack is equipped with exhaust fume collecting hood 7, and exhaust fume collecting hood 7 has
There is the air inlet being connected with air inlet 21.
In the present embodiment, denoising device 4 includes noise reduction orifice plate 41,42 gentle kickboard 43 of front shroud.Wherein, noise reduction orifice plate 41
For the fixed plate on wind turbine cover board 3, numerous noise reduction holes 411 are provided on noise reduction orifice plate 41, noise reduction hole 411 is whole to be covered with
The aperture of a noise reduction orifice plate 41, front shroud 42 are the movable plate set on the front side of noise reduction orifice plate 41, noise reduction orifice plate 41 and front shroud
Noise reduction cavity 5 is formed between 42.Between noise reduction orifice plate 41 and air inlet 21 formed air intake passage 6, air supporting plate 43 be set into
It in wind channel 6 and is connected on front shroud 42, air supporting plate 43 can drive front shroud 42 under the gas shock in air intake passage 6
Opposite noise reduction orifice plate 41 moves, and then adjusts the volume size of noise reduction cavity 5.
The specific mounting structure of denoising device 4 is as follows：
Installation window 31 compatible with 41 size of noise reduction orifice plate is provided on wind turbine cover board 3, noise reduction orifice plate 41 is mounted on peace
It fills on window 31, specifically, the lower edges of noise reduction orifice plate 41 have the installation for being used for mutually assembling with the lower edges of installation window 31
Step 413, after noise reduction orifice plate 41 installs, the rear surface of noise reduction orifice plate 41 is with the rear surface of wind turbine cover board 3 generally in same
In one plane.The right and left of window 31 is installed along baffle 32 is respectively forwardly extended with, the upper edge of front shroud 42 is hinged with company
Fishplate bar 44, the lower edge of front shroud 42 are hinged with lower connecting plate 45, and the left and right ends of upper junction plate 44 and lower connecting plate 45 are divided equally
It is not articulated on the baffle 32 of respective side, noise reduction orifice plate 41, front shroud 42, baffle 32, upper junction plate 44 and lower connecting plate 45 are total
It is same to enclose noise reduction cavity 5.The strip groove 412 that constitutive levels are distributed in the rear surface of noise reduction orifice plate 41, air supporting plate 43 are in item
Shape is simultaneously transversely and horizontally set, and the rear portion of air supporting plate 43 is set in strip groove 412.The left and right ends of air supporting plate 43 are extended with forward
Air supporting plate connecting rod 46, air supporting plate 43 are integrated with air supporting plate connecting rod 46, and air supporting plate connecting rod 46 stretches into forward noise reduction cavity 5
Interior, the front end of air supporting plate connecting rod 46 is hinged on the left and right sides of front shroud 42.The left and right sides in 43 forward position of air supporting plate respectively to
It is outer to be extended with shaft 47,43 gentle kickboard connecting rod 46 of air supporting plate, 47 rotation around the shaft；It is provided with and turns in the corresponding position of baffle 32
The outer end of shaft mounting hole 33, shaft 47 passes through corresponding shaft mounting hole 33 and stretches out in outside baffle 32, in the outer end of shaft 47
The torsional spring 48 for making air supporting plate 43 maintain the trend of rotating down is installed.
In addition, in order to make 43 stress of air supporting plate preferably and smaller to the influence of air duct flow field simultaneously, the gas in the present embodiment
Kickboard 43 is set to using the center line of air inlet 21 as center line and between the upper and lower away from the region for air inlet radius value R,
Optimal is between the upper and lower away from the region for 0.6R.
Operation principle is as follows：
As shown in fig. 6, air supporting plate 43 is in not by the original state of airflow acting force, upper junction plate 44, lower connecting plate 45
Gentle kickboard connecting rod 46 is in horizontal position, and air supporting plate 43 tilts obliquely from front to back, at this point, noise reduction orifice plate 41 is with before
Space D between cover board 42 is maximum, and correspondingly, the volume of noise reduction cavity 5 is maximum.
As shown in fig. 7, when range hood works, air supporting plate 43 is flipped up under the airflow function in air intake passage 6, gas
Kickboard connecting rod 46 as air supporting plate is flipped up and is rotated down, air supporting plate connecting rod 46 so drive front shroud 42 backward under
Fang Yidong makes the spacing between front shroud 42 and noise reduction orifice plate 41 become smaller, and the volume of noise reduction cavity 5 becomes smaller.
As shown in figure 8, the air velocity in air intake passage 6 further increases, air supporting plate 43 is further under airflow function
Be flipped up, air supporting plate connecting rod 46 further rotates down, air supporting plate connecting rod 46 so drive front shroud 42 further to
The back lower place is moved, and so that the spacing between front shroud 42 and noise reduction orifice plate 41 is further become smaller, the volume of noise reduction cavity 5 further becomes
It is small.
By Helmholz resonance principle it is found that in the case where other parameters are constant, noise reduction cavity volume becomes larger, resonant frequency
F reduces, conversely, noise reduction cavity volume becomes smaller, resonant frequency f becomes larger, it is seen then that the noise reduction cavity resonance frequency of the range hood denoising device
The wind that rate can be generated with the different stalls of range hood be made an uproar frequency Auto-matching, to realize the adaptive stepless change of range hood
Frequency noise reduction.
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 noise reduction orifice plate (41), front shroud (42) gentle kickboard (43), it is provided with noise reduction hole (411) on the noise reduction orifice plate (41),
The front shroud (42) is set to the front side of noise reduction orifice plate (41), and is formed between the noise reduction orifice plate (41) and front shroud (42)
Noise reduction cavity (5) is formed with air intake passage (6), the air supporting plate between the noise reduction orifice plate (41) and air inlet (21)
(43) it is set in the air intake passage (6), the air supporting plate (43) can drive under the gas shock in the air intake passage (6)
The noise reduction orifice plate (41) and front shroud (42) are performed relative motion to adjust the volume size of the noise reduction cavity (5).
2. noise reducing type range hood according to claim 1, it is characterised in that：The noise reduction orifice plate (41) is fixed plate,
The front shroud (42) is movable plate, and the air supporting plate (43) is connected on the front shroud (42).
3. noise reducing type range hood according to claim 2, it is characterised in that：Be provided on the wind turbine cover board (3) with
The compatible installation window (31) of noise reduction orifice plate (41) size, the noise reduction orifice plate (41) are mounted on the installation window (31)
On, the right and left of the installation window (31) is cut with scissors along baffle (32), the upper edge of the front shroud (42) is respectively forwardly extended with
Be connected to upper junction plate (44), the lower edge of the front shroud (42) is hinged with lower connecting plate (45), the upper junction plate (44) and
The left and right ends of lower connecting plate (45) are respectively articulated on the baffle (32) of respective side, the noise reduction orifice plate (41), front shroud
(42), baffle (32), upper junction plate (44) and lower connecting plate (45) enclose the noise reduction cavity (5), the air supporting plate jointly
(43) left and right ends are extended with forward air supporting plate connecting rod (46), and the front end of the air supporting plate connecting rod (46) is articulated with described
Front shroud (42) on.
4. noise reducing type range hood according to claim 3, it is characterised in that：The air supporting plate (43) is in a strip shape and lateral
It is horizontally set on the rear side of the noise reduction orifice plate (41), the air supporting plate connecting rod (46) is stretched into forward in the noise reduction cavity (5),
The front end of air supporting plate connecting rod (46) is hinged on the left and right sides of the front shroud (42).
5. noise reducing type range hood according to claim 4, it is characterised in that：The left and right two in air supporting plate (43) forward position
Side is outward extended with shaft (47) respectively, and shaft mounting hole (33), the shaft are provided in the corresponding position of the baffle (32)
(47) outer end passes through corresponding shaft mounting hole (33) and stretches out in baffle (32) outside, is installed in the outer end of the shaft (47)
There is the torsional spring (48) for making air supporting plate (43) maintain the trend of rotating down.
6. noise reducing type range hood according to claim 4, it is characterised in that：In the rear surface of the noise reduction orifice plate (41)
The strip groove (412) of horizontal distribution is formed, the rear portion of the air supporting plate (43) is set in the strip groove (412).
7. noise reducing type range hood according to claim 3, it is characterised in that：The lower edges of the noise reduction orifice plate (41)
With for the installation step (413) that mutually assembles of lower edges with the installation window (31), after the noise reduction orifice plate (41)
The rear surface of surface and the wind turbine cover board (3) is on same plane.
8. noise reducing type range hood according to claim 3, it is characterised in that：Do not made by air-flow in the air supporting plate (43)
Under original state firmly, the gentle kickboard connecting rod (46) of the upper junction plate (44), lower connecting plate (45) is in level
Position, the air supporting plate (43) tilt obliquely from front to back.
9. noise reducing type range hood according to claim 1, it is characterised in that：The air supporting plate (43) be set to wind turbine into
The center line in air port (21) is center line and between the upper and lower away from the region for air inlet radius value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820343394.4U CN208090761U (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 |
|---|---|---|---|
| CN201820343394.4U CN208090761U (en) | 2018-03-13 | 2018-03-13 | A kind of noise reducing type range hood |
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| Publication Number | Publication Date |
|---|---|
| CN208090761U true CN208090761U (en) | 2018-11-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820343394.4U Active CN208090761U (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 |
|---|---|---|---|---|
| CN110274272A (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 |
| CN111677682A (en) * | 2020-05-27 | 2020-09-18 | 嘉兴市名人电器有限公司 | Wall-in type ventilation fan used in cooperation with warmer |
-
2018
- 2018-03-13 CN CN201820343394.4U patent/CN208090761U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274272A (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 |
| CN110274272B (en) * | 2018-03-13 | 2024-02-20 | 宁波方太厨具有限公司 | Noise-reducing type range hood |
| CN111677682A (en) * | 2020-05-27 | 2020-09-18 | 嘉兴市名人电器有限公司 | Wall-in type ventilation fan used in cooperation with warmer |
| CN111677682B (en) * | 2020-05-27 | 2022-05-13 | 嘉兴市名人电器有限公司 | Wall-in type ventilation fan used in cooperation with warmer |
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