CN208794491U - A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole - Google Patents
A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole Download PDFInfo
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- CN208794491U CN208794491U CN201821124498.2U CN201821124498U CN208794491U CN 208794491 U CN208794491 U CN 208794491U CN 201821124498 U CN201821124498 U CN 201821124498U CN 208794491 U CN208794491 U CN 208794491U
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Abstract
A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole is provided with smoke machine main body and can eliminate the noise filtering device of multi-frequency noise, and noise filtering device is assemblied in smoke machine main body；The noise filtering device is set as being distributed with multiple for eliminating the panel of the through-hole of multi-frequency noise.The noise filtering device is able to maintain long-term good noise reduction effect, which, which has, is easy to arrange, and dust, the grease on surface etc. can remove cleaning.The noise filtering device has the advantages that low cost, reliability are high.The material of the noise filtering device is anticorrosive, chemical resistance and is hardly damaged.It can be effectively reduced narrow frequency noise and broadband noise, noise reduction wide frequency range can reduce the noise of multiple frequencies.
Description
Technical field
The utility model relates to kitchen ventilator field, in particular to the kitchen ventilator of a kind of multi-frequency noise filtering with through-hole.
Background technique
It is chronically in the environment of high noisy, the hearing of people is often damaged, and can also be made in the environment of having noise for a long time
At user emotion problem.As people's quality of the life improves, people are also lower and lower to the tolerance of noise.Therefore kitchen ventilator
Noise reduction is also got more and more attention.
Kitchen ventilator noise reduction in the prior art is mostly the reduction that noise is realized by active noise reduction and passive noise reduction mode.
Active noise reduction mode can only act on noise of the frequency within 1000Hz, can only be by passive for the noise greater than 1000Hz
Noise reduction technology processing.And the passive denoising device of the prior art can only be handled for the noise of single-frequency section, it cannot be right
The noise of multiband carries out noise reduction.Since the noisy frequency range that kitchen ventilator generates can be 100Hz~8000Hz, it is clear that existing
In technology good noise reduction effect can not be generated for kitchen ventilator for the passive denoising device of single-frequency section.
Therefore, in view of the shortcomings of the prior art, providing a kind of kitchen ventilator of multi-frequency noise filtering with through-hole to solve now
There is technical deficiency very necessary.
Utility model content
The purpose of this utility model is that avoiding in place of the deficiencies in the prior art and providing a kind of multi-frequency with through-hole and make an uproar
The kitchen ventilator of sound filtering.The kitchen ventilator of the multi-frequency noise filtering with through-hole has the advantages that multi-frequency noise can be eliminated.
The above-mentioned purpose of the utility model is realized by following technical measures:
A kind of kitchen ventilator of multi-frequency noise filtering with through-hole is provided, smoke machine main body is provided with and multi-frequency can be eliminated
The noise filtering device of noise, noise filtering device are assemblied in smoke machine main body.
The noise filtering device is set as being distributed with multiple for eliminating the panel of the through-hole of multi-frequency noise.
The wall surface of panel towards smoke machine main body is defined as front on one side, another side is defined as reverse side, the through-hole is just
The aperture in face is defined as d1, the aperture of through-hole reverse side is defined as d2。
The through-hole is rectilinear through-hole, d1=d2, the side of corresponding through-hole and the width in panel section are parallel；Or
The through-hole is bevel edge through-hole, d1≠d2, the bevel edge of corresponding through-hole and panel section it is wide at included angle A, and A≤
20°。
Preferably, above-mentioned panel is provided with panel body and protrusion, protrusion and panel body integrally connected, through-hole from
Panel body is through to protrusion, and through-hole is set as arc-shaped transition section in panel body, is d with the positive aperture of protrusion1,
The aperture of the reverse side of protrusion is d2。
Preferably, above-mentioned d1≤30mm。
It is further preferred that above-mentioned d1Value be it is multiple.
Preferably, the minimum range between the positive edge of above-mentioned through-hole and the positive edge of adjacent through-holes is b, and b is big
In 0 arbitrary value.
It is further preferred that the value of above-mentioned b is multiple.
Preferably, above-mentioned panel is provided with multiple regions, and multiple through-holes are by area distribution in corresponding positions of panels.
Preferably, above-mentioned zone is bilateral symmetry formula region, formula region symmetrical above and below or asymmetric formula region；Or
The region is divergence expression region, spiral region, wave region, winding type region or removes above-mentioned zone
Random mode region.
The utility model by adjusting the aperture of different through-holes, the edge of through-hole and adjacent through-holes edge minimum range,
The combination of via regions distribution or panel at a distance from smoke machine main body reaches multi-frequency noise noise reduction
Preferably, the thickness of above-mentioned panel is less than 20mm.
Preferably, there are gaps between above-mentioned panel and the immediate wall surface of smoke machine main body, are by the distance definition in gap
H1。
Preferably, above-mentioned noise filtering device is additionally provided with sound-absorbing part, and sound-absorbing part assembles smoke machine main body.
Preferably, the thickness of above-mentioned sound-absorbing part is defined as H2, and H2≤0.6H1。
Preferably, above-mentioned sound-absorbing part is fixed on the outer surface of panel；Or
The sound-absorbing part is fixed on the surface of panel Yu the nearest wall surface of smoke machine main body；Or
The sound-absorbing part is fixed between panel and the nearest wall surface gap of smoke machine main body.
Preferably, above-mentioned sound-absorbing part is fiber, PP cotton, polyester fiber, Carbon fibe or porous foam；Or
The sound-absorbing part is porous plate；
Preferably, above-mentioned panel is metal decking, plastic front board or alloy panel.
Preferably, above-mentioned panel is connected with reinforced structure.
Preferably, above-mentioned reinforced structure is convex closure, recessed packet or reinforcing rib.
Preferably, it is 100Hz~8000Hz that above-mentioned noise filtering device, which eliminates noisy frequency range,.
A kind of kitchen ventilator of multi-frequency noise filtering with through-hole of the utility model is provided with smoke machine main body and can disappear
Except the noise filtering device of multi-frequency noise, noise filtering device is assemblied in smoke machine main body.Denoising device in the prior art, only
Single target frequency noise reduction can be directed to.A kind of kitchen ventilator of multi-frequency noise filtering with through-hole of the utility model can lead to
Cross the edge in the aperture, through-hole that adjust different through-holes and the edge minimum range of adjacent through-holes, via regions distribution or panel
Reach multi-frequency noise noise reduction with the combination at a distance from smoke machine main body.The noise filtering device is able to maintain long-term good noise reduction effect
Fruit, which, which has, is easy to arrange, and dust, the grease on surface etc. can remove cleaning.Noise filtering device tool
Have the advantages that low cost, reliability are high.The material of the noise filtering device is anticorrosive, chemical resistance and is hardly damaged.It can
Narrow frequency noise and broadband noise is effectively reduced, noise reduction wide frequency range can reduce the noise of multiple frequencies.
Detailed description of the invention
The utility model is further described using attached drawing, but the content in attached drawing is not constituted to the utility model
Any restrictions.
Fig. 1 is a kind of range hood structure schematic diagram of multi-frequency noise filtering with through-hole of embodiment 1.
Fig. 2 is the panel construction schematic diagram in Fig. 1.
Fig. 3 is rectilinear through-hole schematic cross-section in Fig. 1.
Fig. 4 is the bevel edge through hole section schematic diagram of embodiment 2.
Fig. 5 is the schematic cross-section of the panel of 3 rectilinear through-hole of embodiment.
Fig. 6 is the schematic cross-section of the panel of bevel edge through-hole.
Fig. 7 is the panel construction schematic diagram of embodiment 4.
Fig. 8 is through-hole different zones distribution mode, and the B in A and Fig. 8 in Fig. 8 is bilateral symmetry formula region, the C in Fig. 8
It is formula region symmetrical above and below with the D in Fig. 8, the F in E and Fig. 8 in Fig. 8 is asymmetric formula region.
Fig. 9 is a kind of range hood structure schematic diagram of multi-frequency noise filtering with through-hole of embodiment 5.
Figure 10 is the panel construction schematic diagram of embodiment 6.
Figure 11 is the panel construction schematic diagram of the utility model embodiment 7.
Figure 12 is through-hole different zones distribution mode, and the B in A and Figure 12 in Figure 12 is divergence expression region, in Figure 12
D in C and Figure 12 is spiral region, and the F in E and Figure 12 in Figure 12 is wave region, in the G and Figure 12 in Figure 12
H be winding type region, the J in I and Figure 12 in Figure 12 is random mode region.
Fig. 1 includes into Figure 12:
Noise filtering device 1,
Panel 11, through-hole 111, reinforced structure 112, panel body 113, protrusion 114,
Sound-absorbing part 12,
Smoke machine main body 2.
Specific embodiment
The technical solution of the utility model is described further with the following Examples.
Embodiment 1.
A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole is provided with smoke machine main body 2 and can as shown in Figures 1 to 3
The noise filtering device 1 of multi-frequency noise is eliminated, noise filtering device 1 is assemblied in smoke machine main body 2.Noise filtering device 1 is arranged
It is multiple for eliminating the panel 11 of the through-hole 111 of multi-frequency noise to be distributed with.
The wall surface of panel 11 towards smoke machine main body 2 is defined as front on one side, another side is defined as reverse side, the through-hole
111 positive apertures are defined as d1, the aperture of 111 reverse side of through-hole is defined as d2.The through-hole 111 of the present embodiment is preferably that straight flange is logical
Hole 111, d1=d2, the side of corresponding through-hole 111 and the width in 11 section of panel are parallel.
The d of the utility model1≤30mm.The edge of through-hole 111 and the edge minimum range of adjacent through-holes 111 are b, and b is
Arbitrary value greater than 0.The d of the present embodiment1Value with b is all multiple.
The utility model is in aperture d1In constant situation, the edge of through-hole 111 and the edge most narrow spacing of adjacent through-holes 111
Target noise frequency from the smaller elimination of the value of b is bigger.In the edge of through-hole 111 and the edge most narrow spacing of adjacent through-holes 111
From in the constant situation of b, aperture d1The smaller target noise frequency to be eliminated of value with regard to smaller.
It should be noted that when the value of value and d for b is unique, it can be to specific unifrequency noise noise reduction.But work as b
And d1For when multiple and different values specific unifrequency noise or multi-frequency noise noise reduction can be combined into according to matching for the two value.b
Value and d1The number of value, size according to the actual situation depending on.
The denoising device principle of the utility model be such that noise filtering device 1 can in limited closed space,
When noise source travels to noise filtering device 1, noise reduction is carried out.Sound wave is usually touching noise filtering device 1 with opposite direction
It propagates, so most incidence wave can be interfered with back wave.
Noise filtering device 1 is to carry out noise reduction using the principle of resonance, the target of specific noise frequency and setting in space
The noise filtering device 1 of frequency forms covibration.
When resonance occurs, the sound wave of oscillation can intensely pierce into out through-hole 111, the sound energy of noise back and forth in air
It is converted to friction loss in the process, achievees the effect that eliminate target frequency noise.
The kitchen ventilator of the multi-frequency noise filtering with through-hole being capable of aperture by adjusting different through-holes 111, through-hole
Edge minimum range, 11 area distribution of through-hole or the panel 11 and smoke machine main body 2 of 111 edge and adjacent through-holes 11 away from
From combination reach multi-frequency noise noise reduction.The noise filtering device 1 is able to maintain long-term good noise reduction effect.Noise filtering dress
It sets 1 to be easy to arrange, while the dust on 1 surface of noise filtering device, grease can be removed by removing.The noise filtering device 1
Have the advantages that low cost and reliability are high.The advantages of material of the noise filtering device 1 is anticorrosive and chemical resistance, is not easy
The advantages of damage.The noise filtering device 1 can be effectively reduced narrow frequency noise and broadband noise simultaneously, and noise reduction frequency range is big,
The noise of multiple frequencies can be reduced simultaneously.
Embodiment 2.
A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole, as shown in figure 4, other characteristics are same as Example 1, no
Be with place: the through-hole 111 of the present embodiment is bevel edge through-hole 111, d1≠d2, correspond to bevel edge and 11 section of panel of through-hole 111
Wide at included angle A, and A≤20 °.
Because making in technique, the aperture of the front and back sides of through-hole 111 has been easy to appear different size and has formed bevel edge and lead to
Hole 111.
Compared with Example 1, the production technology of the present embodiment is easier.
Embodiment 3.
A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole, as shown in figure 5, other features are same as Example 1, no
It is with place, panel 11 is provided with panel body 113 and protrusion 114, and protrusion 114 integrally connects with panel body 113
It connecing, through-hole 111 is through to protrusion 114 from panel body 113, and through-hole 111 is set as arc-shaped transition section in panel body 113,
It is d with the positive aperture of protrusion 1141, the aperture of the reverse side of protrusion 114 is d2。
It should be noted that protrusion 114 has also can be set in the panel 11 of the bevel edge through-hole 111 of the utility model, such as Fig. 6
It is shown, specific performance according to the actual situation depending on.
Compared with Example 1, the setting of the protrusion 114 of panel 11 can be improved the more rigid for low-resistance of panel 11
Buddhist nun's structure.Low resistance structure can make incidence wave and back wave have out of phase under the specific distance with reflecting surface, thus
The sound wave of noise can cancel out each other, to reduce the intensity of noise.
Embodiment 4.
A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole, as shown in fig. 7, other features are same as Example 1, no
It is with place, the utility model panel 11 is provided with multiple regions, and multiple through-holes 111 are by area distribution in corresponding panel 11
Position.
The region of the utility model can be divided into bilateral symmetry formula region, formula region symmetrical above and below or asymmetric formula area
Domain.Specifically, the through-hole 111 of the present embodiment panel 11 presses bilateral symmetry formula region such as a-quadrant, formula area symmetrical above and below in Fig. 7
Domain such as the B area in Fig. 7 and the various forms of area distributions in three kinds of the region C and D in asymmetric formula region such as Fig. 7 are in panel
11。
The bilateral symmetry formula region of the present embodiment, as shown in the A in Fig. 7.It should be noted that the left and right in the utility model
Symmetrical region is not limited to the region that the B in the A or Fig. 8 in A, Fig. 8 in Fig. 7 is these three bilateral symmetry formula modes,
The region of any other bilateral symmetry formula mode also meets the requirement in bilateral symmetry formula region in the utility model, also practical at this
In novel protection scope.
The formula region symmetrical above and below of the present embodiment, as shown in the B in Fig. 7.It should be noted that upper and lower in the utility model
Symmetrical region is not limited to these three the formula mode symmetrical above and below regions the D in the C or Fig. 8 in B, Fig. 8 in Fig. 7, other
The region of any formula mode symmetrical above and below also meets the requirement in the utility model formula region symmetrical above and below, also in the utility model
In protection scope.
The asymmetric formula region of the present embodiment, as shown in the D in the C and Fig. 7 in Fig. 7.It should be noted that the utility model
In asymmetric formula region be not limited to the E in D, Fig. 8 in C, Fig. 7 in Fig. 7 or F in Fig. 8 these four are asymmetric
The region in the region of formula mode, any other asymmetry formula mode also meets the requirement in the utility model asymmetry formula region,
It is within the protection scope of the present utility model.
It should be noted that the through-hole 111 of the panel 11 of the utility model is not limited to the as shown in Figure 7 of the present embodiment
The distribution mode in bilateral symmetry formula region, formula region symmetrical above and below and asymmetric formula region, or bilateral symmetry formula region,
The multiple arrangements of any one in formula region symmetrical above and below or asymmetric formula region, can also more than two kinds of regions one
Arrangement, or multiple arrangements more than two kinds of regions, depending on specific performance is with actual conditions.
The through-hole 111 of the panel 11 of the present embodiment is to be conducive to be configured institute by region by the effect that multiple regions are distributed
The frequency for the target noise for needing to eliminate.
A kind of kitchen ventilator of multi-frequency noise filtering with through-hole of the utility model can be by adjusting different through-holes 111
Aperture and through-hole 111 edge and adjacent through-holes 111 edge minimum range, reach the noise for reducing different target frequency
Purpose, therefore the utility model can achieve wideband frequency noise reduction by division, arrangement and the arrangement in 11 through-hole of panel, 111 region
Purpose.
Embodiment 5.
A kind of kitchen ventilator with the non-planar noise filtering device 1 of multi-frequency, as shown in figure 9, other features and 1 phase of embodiment
Together, the difference is that, the utility model is by adjusting the aperture of different through-holes 111, the edge and adjacent through-holes of through-hole 111
111 edge minimum range or 111 area distribution of through-hole of panel 11 achieve the purpose that multi-frequency noise noise reduction.
The thickness of the panel 11 of the utility model is less than 20mm, because of the blocked up cost that will increase production of thickness and kitchen ventilator
Weight.
There are gaps between the panel 11 and the immediate wall surface of smoke machine main body 2 of the present embodiment, by the distance definition in gap
For H1.Non-planar noise filtering device 1 is additionally provided with sound-absorbing part 12, and sound-absorbing part assembles smoke machine main body 2.The thickness of sound-absorbing part 12
It is defined as H2, and H2≤ 0.6H1。
The sound-absorbing part 12 of the present embodiment is fixed on the outer surface of panel 11.It should be noted that the sound-absorbing part 12 of the utility model
Panel 11 and smoke machine main body are fixed in the surface or sound-absorbing part 12 that panel 11 and the nearest wall surface of smoke machine main body 2 can also be fixed on
Between 2 nearest wall surface gaps, depending on specific embodiment is with actual conditions.
The density and material of sound-absorbing part 12 also have an important influence, sound wave can directly through the sound-absorbing part of extremely-low density,
The frictional wear of sound energy can not be increased；Under high density, noise sound wave then can be reflected away directly, can not enter noise mistake
Filter the through-hole 111 of device 1.Therefore the utility model sound-absorbing part 12 be preferably fiber, PP cotton, polyester fiber, Carbon fibe or
Porous foam.Or sound-absorbing part 12 is porous plate.
The present embodiment increases sound-absorbing part 12 compared with embodiment 1, and the setting of sound-absorbing part 12 can increase the consume of friction, reinforces drop
It makes an uproar effect.
Embodiment 6.
A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole, as shown in Figure 10, other features are same as Example 1,
The difference is that the panel 11 of the present embodiment is specially metal decking 11.Noise filtering device 1 eliminates noisy frequency range
100Hz~8000Hz.
It should be noted that the panel 11 of the utility model or plastic front board 11 or alloy panel 11, specific real
Depending on mode is applied with actual conditions.
The panel 11 of the present embodiment is connected with reinforced structure 112.Specific reinforced structure 112 is reinforcing rib.
It should be noted that the reinforced structure 112 of the utility model or convex closure or recessed packet, or Duo Zhongren
Meaning combination, depending on specific embodiment is with actual conditions.
Compared with Example 1, the more rigid of panel 11 is low resistance structure to the present embodiment.Low resistance structure can make into
Ejected wave and back wave have out of phase under the specific distance with reflecting surface, so that the sound wave of noise can cancel out each other, from
And reduce the intensity of noise.The panel 11 of the metal of the present embodiment has the advantages that high temperature resistant, durable.
Embodiment 7.
A kind of kitchen ventilator with the non-planar noise filtering device 1 of multi-frequency, as shown in figure 11, other features and embodiment 1
It is identical, the difference is that, the region of the present embodiment can be divided into divergence expression region, spiral region, wave region, detour
Formula region or the random mode region for removing above-mentioned zone.
The region of the present embodiment can be divided into two spiral regions, a divergence expression region and a random mode region.
Specifically, the B area in A and Figure 11 in the spiral region of through-hole 111 of the present embodiment panel 11 such as Figure 11, divergence expression region
If the tri- kinds of various forms of area distributions in the region D in Figure 11 and the C in random mode region such as Figure 11 are in panel 11.
The divergence expression region of the present embodiment, as shown in the D in Figure 11.It should be noted that the divergence expression in the utility model
Region is not limited to these three divergence expression regions of the B in the A or Figure 12 in D, Figure 12 in Figure 11, any other diverging
Formula mode region also complies with the requirement in the utility model divergence expression region, also within the protection scope of the present utility model.
The spiral region of the present embodiment, as shown in the B in the A and Figure 11 in Figure 11, it should be noted that, the utility model
In spiral region be not limited to these four spirals of the C in B, Figure 12 in A, Figure 11 in Figure 11 or D in Figure 12
Formula region, any other spiraling manner region also complies with the requirement of the utility model, also in the protection scope of the utility model
It is interior.
The random mode region of the present embodiment, as shown in the C in Figure 11, the random mode region in the utility model is not limited to
These three random mode regions of the J in the I or Figure 12 in C, Figure 12 in Figure 11, any other random mode mode region
Meet the requirement of the utility model, it is also within the protection scope of the present utility model.
Wave region in the utility model is not limited to both wave areas of the F in the E and Figure 12 in Figure 12
Domain, any other wave mode region also complies with the requirement of the utility model, also within the protection scope of the present utility model.
Winding type region in the utility model is not limited to both winding type sides of the H in the G and Figure 12 in Figure 12
Formula, any other winding type mode region also complies with the requirement of the utility model, also within the protection scope of the present utility model.
It should be noted that the through-hole 111 of the panel 11 of the utility model is not limited to the as shown in figure 11 of the present embodiment
The distribution mode in divergence expression region, random mode region and spiral region, or divergence expression region, spiral region, wave
Unrestrained formula region, winding type region remove multiple arrangements of any one in the random mode region of above-mentioned zone, can also be with
A more than two kinds of regions arrangement, or multiple arrangement specific embodiments more than two kinds of regions can be according to reality
Depending on the situation of border.
The present embodiment compared with Example 1, can increase the diversity of 11 through-hole of panel, 111 distributed areas.
Embodiment 8.
A kind of design of the kitchen ventilator of the multi-frequency noise filtering with through-hole:
Target frequency 1:7000Hz.
The aperture d=10mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=23mm of adjacent through-holes 111,
H1=2.6mm.
Target frequency 2:800Hz.
The aperture d=2mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=23mm of adjacent through-holes 111,
H1=2.5mm.
Therefore the noise filtering device 1 of the kitchen ventilator is only in the spy with the corresponding through-hole 111 of above-mentioned two target frequency
Property can effectively eliminate the noise of corresponding frequency.
It should be noted that the present embodiment only lists the design parameter of two target frequencies, table is not for the utility model
It can only be directed to the noise of two kinds of frequencies, only corresponding different parameter, the utility model can eliminate the noise of multi-frequency, reach wide
Band frequency noise reduction purpose.
Embodiment 8.
A kind of design of the kitchen ventilator of the multi-frequency noise filtering with through-hole:
Target frequency 1:8000Hz.
The aperture d=10mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=23mm of adjacent through-holes 111,
H1=2.5mm.
Target frequency 2:100Hz.
The aperture d=2mm of through-hole 111, the edge of through-hole 111 and the edge minimum range b=23mm of adjacent through-holes 111,
H1=50mm.
Therefore the noise filtering device 1 of the kitchen ventilator is only in the spy with the corresponding through-hole 111 of above-mentioned two target frequency
Property can effectively eliminate the noise of corresponding frequency.
It should be noted that the present embodiment only lists the design parameter of two target frequencies, table is not for the utility model
It can only be directed to the noise of two kinds of frequencies, only corresponding different parameter, the utility model can eliminate the noise of multi-frequency, reach wide
Band frequency noise reduction purpose.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model rather than to this is practical
The limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, the common skill of this field
Art personnel, which should be appreciated that, can be modified or replaced equivalently technical solutions of the utility model, practical new without departing from this
The spirit and scope of type technical solution.
Claims (10)
1. a kind of kitchen ventilator of the multi-frequency noise filtering with through-hole, it is characterised in that: it is provided with smoke machine main body and can eliminate
The noise filtering device of multi-frequency noise, noise filtering device are assemblied in smoke machine main body；
The noise filtering device is set as being distributed with multiple for eliminating the panel of the through-hole of multi-frequency noise；
The wall surface of panel towards smoke machine main body is defined as front on one side, another side is defined as reverse side, the through-hole is positive
Aperture is defined as d1, the aperture of through-hole reverse side is defined as d2；
The through-hole is rectilinear through-hole, d1=d2, the side of corresponding through-hole and the width in panel section are parallel；Or
The through-hole is bevel edge through-hole, d1≠d2, wide at included angle A, and A≤20 ° in the bevel edge of corresponding through-hole and panel section.
2. the kitchen ventilator of the multi-frequency noise filtering according to claim 1 with through-hole, it is characterised in that: the panel is set
It is equipped with panel body and protrusion, protrusion and panel body integrally connected, through-hole is through to protrusion, through-hole from panel body
It is set as arc-shaped transition section in panel body, is d with the positive aperture of protrusion1, the aperture of the reverse side of protrusion is d2。
3. the kitchen ventilator of the multi-frequency noise filtering according to claim 1 or 2 with through-hole, it is characterised in that: the d1≤
30mm；
The d1Value be it is multiple.
4. the kitchen ventilator of the multi-frequency noise filtering according to claim 3 with through-hole, it is characterised in that: the through-hole is just
Minimum range between the positive edge in edge and adjacent through-holes in face is b, and b is the arbitrary value greater than 0；
The value of the b is multiple.
5. the kitchen ventilator of the multi-frequency noise filtering according to claim 4 with through-hole, it is characterised in that: the panel is set
Multiple regions are equipped with, multiple through-holes are by area distribution in corresponding positions of panels；
The region is bilateral symmetry formula region, formula region symmetrical above and below or asymmetric formula region；Or
The region be divergence expression region, spiral region, wave region, winding type region or remove above-mentioned zone with
Machine formula region.
6. the kitchen ventilator of the multi-frequency noise filtering according to claim 5 with through-hole, it is characterised in that: by adjusting not
With the edge minimum range in the aperture of through-hole, the edge of through-hole and adjacent through-holes, via regions distribution or panel and smoke machine master
The combination of the distance of body reaches multi-frequency noise noise reduction；
The thickness of the panel is less than 20mm.
7. the kitchen ventilator of the multi-frequency noise filtering according to claim 4 with through-hole, it is characterised in that: the panel with
There are gaps between the immediate wall surface of smoke machine main body, are H by the distance definition in gap1；
The noise filtering device is additionally provided with sound-absorbing part, and sound-absorbing part assembles smoke machine main body；
The thickness of the sound-absorbing part is defined as H2, and H2≤0.6H1。
8. the kitchen ventilator of the multi-frequency noise filtering according to claim 7 with through-hole, it is characterised in that: the sound-absorbing part
It is fixed on the outer surface of panel；Or
The sound-absorbing part is fixed on the surface of panel Yu the nearest wall surface of smoke machine main body；Or
The sound-absorbing part is fixed between panel and the nearest wall surface gap of smoke machine main body.
9. the kitchen ventilator of the multi-frequency noise filtering according to claim 8 with through-hole, it is characterised in that: the sound-absorbing part
For fiber, PP cotton, polyester fiber, Carbon fibe or porous foam；Or
The sound-absorbing part is porous plate.
10. the kitchen ventilator of the multi-frequency noise filtering according to claim 9 with through-hole, it is characterised in that: the panel
For metal decking, plastic front board or alloy panel；
The panel is connected with reinforced structure；
The reinforced structure is convex closure, recessed packet or reinforcing rib；
It is 100Hz~8000Hz that the noise filtering device, which eliminates noisy frequency range,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821124498.2U CN208794491U (en) | 2018-07-14 | 2018-07-14 | A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821124498.2U CN208794491U (en) | 2018-07-14 | 2018-07-14 | A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole |
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| CN208794491U true CN208794491U (en) | 2019-04-26 |
Family
ID=66202512
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| CN201821124498.2U Active CN208794491U (en) | 2018-07-14 | 2018-07-14 | A kind of kitchen ventilator of the multi-frequency noise filtering with through-hole |
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| Country | Link |
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2018
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