CN208312473U - A kind of noise reducing type range hood - Google Patents
A kind of noise reducing type range hood Download PDFInfo
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- CN208312473U CN208312473U CN201820342744.5U CN201820342744U CN208312473U CN 208312473 U CN208312473 U CN 208312473U CN 201820342744 U CN201820342744 U CN 201820342744U CN 208312473 U CN208312473 U CN 208312473U
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Abstract
A kind of noise reducing type range hood, including blower rack and blower, blower cover board is equipped on front side of blower rack, denoising device is installed on blower cover board, denoising device includes fixed noise reducing plate, movable noise reducing plate and noise reduction orifice plate, fixed noise reducing plate is set on blower cover board, being covered on fixed noise reducing plate has noise reduction cavity, noise reduction orifice plate is set to the rear side of fixed noise reducing plate, noise reduction corresponding with noise reduction cavity hole is provided on noise reduction orifice plate, noise reduction hole region is corresponding with air inlet, movable noise reducing plate is set on front side of fixed noise reducing plate, movable noise reducing plate under the driving of driving mechanism can before and after fixed noise reducing plate to mobile to adjust noise reduction cavity volume size.The noise reducing type range hood passes through the volume size of the noise reduction cavity on the adjustable fixed noise reducing plate of back-and-forth motion of movable noise reducing plate, according to Helmholz resonance principle, the wind that the different stalls of the resonant frequency of noise reduction cavity and range hood can be made to generate frequency of making an uproar is identical or match, and realizes stepless noise reduction.
Description
Technical field
The utility model relates to a kind of range hoods, more particularly, to a kind of noise reducing type range hood.
Background technique
The Chinese way of cooking can generate a large amount of oil smoke, and for the health for keeping kitchen environment cleaning and human body, range hood is had become
For one of essential equipment in Modern Family kitchen.In the process of running, air motion generates turbulent flow and issues range hood
Noise influences the culinary art experience and 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)
Sound-absorbing is arranged in the advance tuyere position of face spiral case in " a kind of silence exhauster for removing cooking fumes " disclosed in bright patent, the range hood
Micropore is arranged on sound-absorbing pod, and the rear panel in sound-absorbing pod face advance air port is obliquely installed for pod, makes it
Preceding oil smoke passway diameter between the advance air port of spiral case gradually becomes smaller 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 inclination
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 of sound absorption frequency, 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, mute file etc. are made with being supplied to when user cooks 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 effect needs to be further increased.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned state of the 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 adopted by the utility model to solve the above technical problems is as follows: the noise reducing type range hood, including wind
Rack and the blower in blower rack, blower rack front side are equipped with blower cover board, and noise reduction dress is equipped on the blower cover board
It sets, it is characterised in that: the denoising device includes fixed noise reducing plate, movable noise reducing plate and noise reduction orifice plate, the fixed noise reducing plate
On blower cover board, being covered on fixed noise reducing plate has noise reduction cavity, and the noise reduction orifice plate is set to the rear side of fixed noise reducing plate, is dropping
It makes an uproar and is provided with noise reduction corresponding with noise reduction cavity hole on orifice plate, noise reduction hole region is corresponding with air inlet, described
Movable noise reducing plate is set on front side of fixed noise reducing plate, and the activity noise reducing plate can fix noise reducing plate relatively under the driving of driving mechanism
Front and back is to mobile to adjust the noise reduction cavity volume size.
As a preferred embodiment, installation window, the noise reduction orifice plate and blower cover board are provided on the blower cover board
In same plane and it is mounted on the installation window.
As another preferred embodiment, the blower cover board constitutes the noise reduction orifice plate.In this way, it is only necessary in fan cover
Noise reduction hole is directly opened on plate, denoising device structure is more succinct.
Movable noise reducing plate and fixed noise reducing plate can be there are many fit structures, it is preferable that the activity noise reducing plate includes
Front side bottom plate and the pillar to extend back from front side bottom plate, the pillar are corresponded with the noise reduction cavity and are plugged from front to back
In corresponding noise reduction cavity.
Preferably, plane where the air inlet tilts backwards from top to bottom, and the noise reduction orifice plate is vertically arranged, institute
The size for stating noise reduction hole is identical, and the volume of the noise reduction cavity gradually becomes smaller from bottom to top.In this way, denoising device and blower into
The air intake passage become narrow gradually from bottom to top is formed between air port, using Helmholz resonance noise-cancelling theory, so that the noise reduction fills
The resonant frequency set matches with the pneumatic noise frequency in respective horizontal face, and noise reduction sound-deadening effect is good.
Preferably, plane where the air inlet is vertically arranged, and the noise reduction orifice plate is vertically arranged and noise reduction hole
Size is identical, and the volume size of the noise reduction cavity is identical.
Driving mechanism can have a variety of structures, a kind of preferred embodiment are as follows: the driving mechanism includes bracket and electronic pushes away
Bar, the bracket include the connecting rod that the supporting block at left and right sides of movable noise reducing plate is set between two supporting blocks, institute
It states supporting block to be mounted on the blower cover board, the centre of the connecting rod has motor mounting part, the electric pushrod installation
On the motor mounting part, and the output end of electric pushrod is mounted on the movable noise reducing plate.
Another preferred embodiment of driving mechanism are as follows: the driving mechanism include support base, motor, cam mounting rod and
Cam, there are two the support bases and is set to the left and right sides of movable noise reducing plate, and the support base is mounted on the blower cover board
On, the cam mounting rod is mounted between two support bases and being rotated by the motor, the cam installation
It offsets on cam mounting rod and with the leading flank of movable noise reducing plate.
Another preferred embodiment of driving mechanism are as follows: the driving mechanism include left support, right support, driver, on
Vertical telescopic rod, lower vertical telescopic rod, upper trunnion axis, by-level axis, lower trunnion axis, upper connecting rod and lower connecting rod, it is described
Left support and right support are respectively arranged on the left and right sides of the movable noise reducing plate and are mounted on blower cover board, the by-level
The both ends of axis are separately mounted on the left support and right support, between the left end of upper trunnion axis and the left end of by-level axis
And be mutually flexibly connected by the upper connecting rod between the right end of upper trunnion axis and the right end of by-level axis, in lower level
Pass through between the left end of axis and the left end of by-level axis and between the right end of lower trunnion axis and the right end of by-level axis
The lower connecting rod is mutually flexibly connected, and the head of the upper vertical telescopic rod is mounted on the centre of trunnion axis, described lower vertical
The head of telescopic rod is mounted on the centre of lower trunnion axis, and the upper vertical telescopic rod and lower vertical telescopic rod are in the drive of driver
Stretching motion up and down is synchronized under dynamic, is mounted on idler wheel at the both ends of the upper trunnion axis and lower trunnion axis, in the activity drop
The para postion of leading flank of plate of making an uproar is equipped with support for limiting the idler wheel.
Further preferably, which further includes having exhaust fume collecting hood, and the exhaust fume collecting hood is mounted under blower rack
Side, exhaust fume collecting hood have the air inlet being connected with air inlet.
Compared with the prior art, the advantages of the utility model are: the movable noise reducing plate of the noise reducing type range hood is driving
Noise reducing plate back-and-forth motion can be fixed under the driving of motivation structure relatively, and then the volume for adjusting the noise reduction cavity fixed on noise reducing plate is big
Small, according to Helmholz resonance principle, the wind that the different stalls of the resonant frequency and range hood that can make noise reduction cavity generate is made an uproar
Frequency is identical or matches, also, the stepless noise reduction of range hood may be implemented by the step-less adjustment of noise reduction cavity volume.
Detailed description of the invention
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 partial structural diagram of the utility model embodiment one under the larger state of noise reduction cavity volume；
Fig. 4 is partial structural diagram of the utility model embodiment one under noise reduction cavity small volume state；
Fig. 5 is the partial exploded view of the utility model embodiment one；
Fig. 6 is the structural schematic diagram of the denoising device of the utility model embodiment one；
Fig. 7 is the structural schematic diagram of the utility model embodiment two；
Fig. 8 is the structural schematic diagram of the utility model embodiment three；
Fig. 9 is the structure sectional view of the utility model embodiment three；
Figure 10 is the driving mechanism of the utility model embodiment three and the cooperation schematic diagram of denoising device；
Figure 11 is structural schematic diagram of the driving mechanism of the utility model embodiment three under telescopic rod stretching state；
Figure 12 is structural schematic diagram of the driving mechanism of the utility model embodiment three under telescopic rod retracted mode；
Figure 13 is the structural schematic diagram of the movable noise reducing plate of the utility model embodiment three；
Figure 14 is the structural schematic diagram of the utility model embodiment four；
Figure 15 is the structural schematic diagram of the utility model embodiment five.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Embodiment one:
It as shown in Figures 1 to 6, is preceding to noise reducing type range hood in the present embodiment with direction shown in arrow A in Fig. 2
Including blower rack 1, blower 2 is installed inside blower rack 1, the front side of blower 2 has air inlet 21, the front side of blower rack 1
Blower cover board 3 is installed, denoising device 4 is installed on blower cover board 3.Exhaust fume collecting hood 7 is installed, exhaust fume collecting hood 7 has below blower rack 1
There is the air inlet being connected with air inlet 21.
In the present embodiment, denoising device 4 includes fixed noise reducing plate 41, movable noise reducing plate 42 and noise reduction orifice plate 43.Fixed drop
Plate 41 of making an uproar is set on blower cover board 3, and being covered on fixed noise reducing plate 41 has noise reduction cavity 411.Movable noise reducing plate 42 is set to fixed noise reduction
41 front side of plate, movable noise reducing plate 42 are moved forward and backward under the driving of driving mechanism, and movable noise reducing plate 42 includes front side bottom plate 421
With the pillar 422 to extend back from front side bottom plate, pillar 422 is corresponded with noise reduction cavity 411 and is plugged in from front to back corresponding
Noise reduction cavity 411 in.Installation window 31 is provided on blower cover board 3, noise reduction orifice plate 43 is set to the rear side of fixed noise reducing plate 41 simultaneously
It is mounted on the installation window 31, and the noise reduction orifice plate 43 after installation is in same plane with blower cover board 3, noise reduction orifice plate 43 is
Microwell plate, be provided on noise reduction orifice plate 43 with the one-to-one noise reduction hole 431 of noise reduction cavity 411, to form Helmholtz noise reduction cavity.
Also, 431 region of noise reduction hole is corresponding with air inlet 21.,
Driving mechanism in the present embodiment includes bracket 51 and electric pushrod 52, and bracket 51 includes being set to movable noise reducing plate
The supporting block 511 of 42 left and right sides is set to the connecting rod 512 between two supporting blocks, and supporting block 511 is mounted on blower cover board 3
On, the centre of connecting rod 512 has motor mounting part 513, and electric pushrod 52 is mounted on motor mounting part 513, and electronic pushes away
The output end of bar 52 is mounted on movable noise reducing plate 42.
When work, 52 drive activity noise reducing plate 42 of electric pushrod relative to 41 front and back of fixed noise reducing plate to movement, so as to
The depth that pillar 422 is inserted into noise reduction cavity 411 is adjusted, so that the volume size of noise reduction cavity 411 changes.
According to Helmholz resonance principle, the resonant frequency of each independent noise reduction cavity isC is the velocity of sound, S
For corresponding noise reduction hole area, V is noise reduction cavity volume, and L is the effective neck length in noise reduction hole.It follows that the feelings constant in other parameters
Under condition, noise reduction cavity volume becomes larger, and resonant frequency f reduces, conversely, noise reduction cavity volume becomes smaller, resonant frequency f becomes larger.Utilize conspicuous nurse
Huo Zi resonates noise reduction principle, and the air in air column and noise reduction cavity in noise reduction hole constitutes elastic resonance system, works as fume-exhausting
When the partial noise frequency of machine is identical with the intrinsic frequency of this resonance system, resonance and and hole occur for the air column in noise reduction hole
Severe friction occurs for wall, and friction enables sound to be converted into thermal energy, to achieve the purpose that noise elimination.It follows that change can be passed through
The volume size of noise reduction cavity come control sound absorption peak value resonant frequency.
In addition, noise reduction orifice plate 43 is vertical as shown in Fig. 2, the 21 place plane of air inlet of the present embodiment is vertically arranged
It is arranged and the size in noise reduction hole 431 is identical, the volume size of noise reduction cavity 411 is identical.
Embodiment two:
As shown in fig. 7, the driving mechanism in the present embodiment includes support base 53, motor 54, cam mounting rod 55 and cam
56, there are two support bases 53 and is set to the left and right sides of movable noise reducing plate 42, and support base 53 is mounted on blower cover board 3, cam
Mounting rod 55 is mounted between two support bases 53 and being rotated by motor 54, and cam 56 is mounted on cam installation
It offsets on bar 55 and with the leading flank of movable noise reducing plate 42.
When work, motor 54 is rotated with moving cam 56, and then relatively fixed 41 front and back of noise reducing plate of drive activity noise reducing plate 42
To movement, so as to adjust the depth that pillar 422 is inserted into noise reduction cavity 411, so that the volume size of noise reduction cavity 411 becomes
Change.
The denoising device and principle of noise reduction of the present embodiment are the same as example 1, herein not reinflated description.
Embodiment three:
As shown in Fig. 8 to Figure 13, the driving mechanism of the present embodiment includes left support 60, right support 61, driver 62, upper perpendicular
Straight telescopic rod 63, lower vertical telescopic rod 64, upper trunnion axis 65, by-level axis 66, lower trunnion axis 67, upper connecting rod 68 and lower company
Extension bar 69.Wherein, left support 60 and right support 61 are respectively arranged on the left and right sides of movable noise reducing plate 42 and are mounted on blower cover board 3
On, the both ends of by-level axis 66 are separately mounted on left support 60 and right support 61, in the left end and centre of upper trunnion axis 65
Pass through upper connecting rod between the left end of trunnion axis 66 and between the right end of upper trunnion axis 65 and the right end of by-level axis 66
68 phases are flexibly connected, between the left end of lower trunnion axis 67 and the left end of by-level axis 66 and the right end of lower trunnion axis 67
It is flexibly connected by 69 phase of lower connecting rod between the right end of by-level axis 66, the head installation of upper vertical telescopic rod 63
In the centre of upper trunnion axis 65, the head of lower vertical telescopic rod 64 is mounted on the centre of lower trunnion axis 67, and upper vertical telescopic rod
63 with lower vertical telescopic rod 64 under the driving of driver 62 it is synchronous up and down stretching motion.In upper trunnion axis 65 and lower trunnion axis 67
Both ends be mounted on idler wheel 610, be equipped in the para postion of the leading flank of movable noise reducing plate 42 for limited roller 610
Support 423.In addition, support 423 is equipped with sliding slot 424, respectively there are an idler wheel 610 in the two sides of support 423, and idler wheel 610 can be along
Sliding slot 424 scrolls up and down.
When work, driver 62 drives upper vertical telescopic rod 63 and lower 64 synchronization telescope of vertical telescopic rod.As shown in figure 11,
Upper vertical telescopic rod 63 and lower vertical telescopic rod 64 be in stretching state, at this point, upper trunnion axis 65 and by-level axis 66 and
The spacing of lower trunnion axis 67 and by-level axis 66 is larger, and upper connecting rod 68 and the angle of lower connecting rod 69 are larger, accordingly
Ground, the depth that the pillar 422 of movable noise reducing plate 42 is inserted into noise reduction cavity 411 is shallower, and 411 volume of noise reduction cavity is larger.Such as Figure 12 institute
Show, upper vertical telescopic rod 63 and lower vertical telescopic rod 64 are in retracted mode, at this point, upper trunnion axis 65 and by-level axis 66 with
And the spacing of lower trunnion axis 67 and by-level axis 66 is smaller, and upper connecting rod 68 and the angle of lower connecting rod 69 are smaller, accordingly
Ground, the depth that the pillar 422 of movable noise reducing plate 42 is inserted into noise reduction cavity 411 is deeper, 411 small volume of noise reduction cavity.
The denoising device and principle of noise reduction of the present embodiment are the same as example 1, herein not reinflated description.
Example IV:
As shown in figure 14, the 21 place plane of air inlet of the present embodiment tilts backwards from top to bottom, noise reduction orifice plate 43
It is vertically arranged, the size in noise reduction hole 431 is identical, and the volume of noise reduction cavity 411 gradually becomes smaller from bottom to top.In this way, noise reduction fills
The air intake passage for being formed between 4 and air inlet 21 and being become narrow gradually from bottom to top is set, using Helmholz resonance noise-cancelling theory,
So that the resonant frequency of the denoising device 4 matches with the pneumatic noise frequency in respective horizontal face, noise reduction sound-deadening effect is good.
The denoising device and principle of noise reduction of the present embodiment are the same as example 1, herein not reinflated description.
Embodiment five:
As shown in figure 15, the blower cover board 3 of the present embodiment is noise reduction orifice plate 43, and the through-hole 32 on blower cover board 3 is structure
At noise reduction hole, denoising device structure is more succinct.
The principle of noise reduction of the present embodiment is the same as example 1, herein not reinflated description.
Claims (9)
1. a kind of noise reducing type range hood, the blower (2) including blower rack (1) and in blower rack, blower rack (1) front side are set
There are blower cover board (3), denoising device (4) are installed on the blower cover board (3), it is characterised in that: the denoising device (4)
Fan cover is set to including fixed noise reducing plate (41), movable noise reducing plate (42) and noise reduction orifice plate (43), the fixed noise reducing plate (41)
On plate (3), being covered on fixed noise reducing plate (41) has noise reduction cavity (411), and the noise reduction orifice plate (43) is set to fixed noise reducing plate (41)
Rear side, noise reduction corresponding with the noise reduction cavity (411) hole (431), noise reduction hole (431) institute are provided on noise reduction orifice plate (43)
Corresponding with air inlet (21) in region, the activity noise reducing plate (42) is set on front side of fixed noise reducing plate (41), the work
Dynamic noise reducing plate (42) can be before and after fixed noise reducing plate (41) to moving to adjust the noise reduction cavity under the driving of driving mechanism
(411) volume size.
2. noise reducing type range hood according to claim 1, it is characterised in that: be provided with peace on the blower cover board (3)
It fills window (31), the noise reduction orifice plate (43) and blower cover board (3) are in same plane and are mounted on the installation window (31)
On.
3. noise reducing type range hood according to claim 1, it is characterised in that: the blower cover board (3) constitutes described
Noise reduction orifice plate (43).
4. noise reducing type range hood according to claim 1, it is characterised in that: before the activity noise reducing plate (42) includes
Side bottom plate (421) and the pillar (422) to extend back from front side bottom plate, the pillar (422) and the noise reduction cavity (411) are one by one
It corresponds to and is plugged in corresponding noise reduction cavity (411) from front to back.
5. noise reducing type range hood according to claim 1, it is characterised in that: plane where the air inlet (21)
It tilts backwards from top to bottom, the noise reduction orifice plate (43) is vertically arranged, and the size of the noise reduction hole (431) is identical, described
The volume of noise reduction cavity (411) gradually becomes smaller from bottom to top.
6. noise reducing type range hood according to claim 1, it is characterised in that: plane where the air inlet (21)
It is vertically arranged, the noise reduction orifice plate (43) is vertically arranged and the size of noise reduction hole (431) is identical, the noise reduction cavity (411)
Volume size it is identical.
7. according to claim 1 to noise reducing type range hood described in any claim in 6, it is characterised in that: the drive
Motivation structure includes bracket (51) and electric pushrod (52), and the bracket (51) includes being set at left and right sides of movable noise reducing plate (42)
Supporting block (511) is set to the connecting rod (512) between two supporting blocks, and the supporting block (511) is mounted on the fan cover
On plate (3), the centre of the connecting rod (512) has motor mounting part (513), and the electric pushrod (52) is mounted on the electricity
On machine mounting portion (513), and the output end of electric pushrod (52) is mounted on the movable noise reducing plate (42).
8. according to claim 1 to noise reducing type range hood described in any claim in 6, it is characterised in that: the drive
Motivation structure includes support base (53), motor (54), cam mounting rod (55) and cam (56), and there are two simultaneously for the support base (53)
Set on the left and right sides of movable noise reducing plate (42), the support base (53) is mounted on the blower cover board (3), the cam peace
Dress bar (55) is mounted between two support bases (53) and being rotated by the motor (54), cam (56) peace
It offsets on cam mounting rod (55) and with the leading flank of movable noise reducing plate (42).
9. according to claim 1 to noise reducing type range hood described in any claim in 6, it is characterised in that: the drive
Motivation structure include left support (60), right support (61), driver (62), upper vertical telescopic rod (63), lower vertical telescopic rod (64),
Upper trunnion axis (65), by-level axis (66), lower trunnion axis (67), upper connecting rod (68) and lower connecting rod (69), the left branch
Frame (60) and right support (61) are respectively arranged on the left and right sides of the movable noise reducing plate (42) and are mounted on blower cover board (3),
The both ends of the by-level axis (66) are separately mounted on the left support (60) and right support (61), in upper trunnion axis (65)
Left end and by-level axis (66) left end between and upper trunnion axis (65) right end and by-level axis (66) right end
Between be mutually flexibly connected by the upper connecting rod (68), on the left end of lower trunnion axis (67) and the left side of by-level axis (66)
Pass through the lower connecting rod (69) between end and between the right end of lower trunnion axis (67) and the right end of by-level axis (66)
It is mutually flexibly connected, the head of the upper vertical telescopic rod (63) is mounted on the centre of trunnion axis (65), described lower vertical flexible
The head of bar (64) is mounted on the centre of lower trunnion axis (67), and the upper vertical telescopic rod (63) and lower vertical telescopic rod (64)
Stretching motion up and down is synchronized under the driving of driver (62), it is equal at the both ends of the upper trunnion axis (65) and lower trunnion axis (67)
Idler wheel (610) are installed, are equipped in the para postion of the leading flank of the movable noise reducing plate (42) for limiting the idler wheel
(610) support (423).
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| CN201820342744.5U CN208312473U (en) | 2018-03-13 | 2018-03-13 | A kind of noise reducing type range hood |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274276A (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 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274276A (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 |
| CN110274276B (en) * | 2018-03-13 | 2024-02-20 | 宁波方太厨具有限公司 | Noise-reducing type range hood |
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