阅读说明：本技术 消音降噪装置 (Noise reduction device ) 是由 易炬 李姜 袁念眉 于 2021-09-08 设计创作，主要内容包括：本发明公开了一种消音降噪装置,包括壳体和置于该壳体内的消声板；该壳体内设有风道,该消声板至少设有2块,且该消声板均沿该风道延伸方向分布；该消声板包括骨架和导流板,该导流板至少设有2块,且该导流板均固定于该骨架。本发明能够实现消音降噪,且避免消音装置内部霉变或异味,避免因灰尘的堆积而降低降噪效果。(The invention discloses a noise reduction device, which comprises a shell and a noise reduction plate arranged in the shell; an air duct is arranged in the shell, at least 2 silencing plates are arranged in the shell, and the silencing plates are distributed along the extending direction of the air duct; the noise reduction plate comprises a framework and a guide plate, wherein the guide plate is at least provided with 2 guide plates, and the guide plates are fixed on the framework. The invention can realize noise reduction, avoid the internal mildew or peculiar smell of the silencing device and avoid the reduction of the noise reduction effect caused by the accumulation of dust.)

1. The noise reduction device comprises a shell and a noise reduction plate arranged in the shell; an air duct is arranged in the shell, at least 2 silencing plates are arranged in the shell, and the silencing plates are distributed along the extending direction of the air duct; it is characterized in that the preparation method is characterized in that,

the silencing plate comprises a framework and a guide plate,

the guide plate is at least provided with 2 guide plates, and the guide plates are all fixed on the framework.

2. The noise dampening and noise reducing device of claim 1,

the sound-absorbing plate and the shell are integrally formed.

3. The noise dampening and noise reducing device of claim 1,

the muffler plate is detachably connected with the housing.

4. The noise dampening and noise reducing device of claim 3,

the casing includes upper housing and lower casing, and this upper housing and this lower casing buckle are connected.

5. The noise dampening and noise reducing device of claim 4,

the upper shell is provided with a clamping hook, and the lower shell is provided with a clamping strip buckled with the clamping hook.

6. The noise dampening and noise reducing device of claim 4 or 5,

the inner walls of the upper shell and the lower shell are both provided with slots,

the framework is inserted into the slot.

7. The noise dampening and noise reducing device of claim 1,

the included angle between the silencing plate and the vertical plane is beta, beta is more than or equal to 0 and less than 90 degrees, and the included angles beta of the adjacent 2 silencing plates are the same or different.

8. The noise dampening and noise reducing device of claim 1,

the included angle between the guide plate and the vertical plane is alpha, alpha is more than 0 and less than 180 degrees, and the included angles alpha of the adjacent guide plates are the same or different.

9. The noise dampening and noise reducing device of claim 8,

in 2 adjacent noise elimination boards, the included angles alpha of the guide plates are the same or different.

Technical Field

The invention relates to the technical field of noise reduction, in particular to a noise reduction device.

Background

The existing noise reduction methods for vacuum cleaners, sweeping robots, and some duct systems place sound absorbing materials in the areas where wind flows. A drawback of this approach is that if water or moisture is trapped in the air stream, the water can remain inside the sound absorbing material, risking mildew and odor, and causing health hazards to the user. Another drawback of this method of reducing noise with sound absorbing materials is that the sound absorbing materials have small cellular structures that accumulate dust after long-term use, and the dust can reduce the noise reduction effect of the sound absorbing materials.

Disclosure of Invention

The invention aims to provide a noise reduction device, which is designed for the noise reduction device, can realize noise reduction, avoid the internal mildew or peculiar smell of the noise reduction device and avoid the reduction of noise reduction effect caused by the accumulation of dust.

The embodiment of the invention is realized by the following technical scheme:

the noise reduction device comprises a shell and a noise reduction plate arranged in the shell; an air duct is arranged in the shell, at least 2 silencing plates are arranged in the shell, and the silencing plates are distributed along the extending direction of the air duct; the noise reduction plate comprises a framework and a guide plate, wherein the guide plate is at least provided with 2 guide plates, and the guide plates are fixed on the framework.

In an embodiment of the invention, the sound-deadening plate is integrally formed with the housing.

In one embodiment of the invention, the sound-deadening sheet is detachably attached to the housing.

In an embodiment of the invention, the housing includes an upper housing and a lower housing, and the upper housing and the lower housing are connected by a snap fit.

In an embodiment of the present invention, the upper housing has a hook, and the lower housing has a fastening strip fastened with the hook.

In an embodiment of the present invention, the inner walls of the upper housing and the lower housing are provided with slots, and the frame is inserted into the slots.

In one embodiment of the invention, the included angle between the sound-absorbing plate and the vertical plane is beta, beta is more than or equal to 0 and less than 90 degrees, and the included angles beta of the adjacent 2 sound-absorbing plates are the same or different.

In an embodiment of the invention, the included angle between the guide plate and the vertical plane is alpha, 0 < alpha < 180 degrees, and the included angles alpha of the adjacent 2 guide plates are the same or different.

In an embodiment of the present invention, in 2 adjacent sound-deadening plates, the included angles α of the flow-guiding plates are the same or different.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:

the embodiment of the invention arranges the noise reduction device comprising a shell and a noise reduction plate, wherein the shell is internally provided with an air channel, the noise reduction plate is provided with 2 or more than 2 flow deflectors, the flow deflectors divide the air flow entering the air channel into at least 3 air flow branches, and the air flow changes the flow direction due to the flow deflectors, so that the sound wave is reflected and interfered in the shell; in the air duct in the shell, at least 2 silencing plates are arranged along the extending direction of the air duct, so that air flow entering the air duct is separated for at least 2 times, meanwhile, different silencing plates enable different local spaces in the air duct to have different acoustic impedance characteristics, when sound waves pass through the spaces with different acoustic impedances, reflection and interference can occur, and then the effect of noise reduction is achieved; in addition, in the embodiment, the plurality of sound-absorbing plates are arranged and combined to form one or more layers of three-dimensional sound-absorbing layers, so that the noise-absorbing and noise-reducing device has the noise-reducing effect. Compared with the prior art, this embodiment can replace sound absorbing material to reach the purpose of making an uproar falls in the amortization, and can avoid silencing device inside because of the humidity mildenes and rot or the peculiar smell, avoids reducing noise reduction effect because of piling up of dust.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the lower case of the present invention;

FIG. 3 is a schematic structural view of the upper housing of the present invention;

FIG. 4 is a schematic structural view of an acoustic panel according to the present invention;

FIG. 5 is a schematic structural view of an arc-shaped muffler plate according to the present invention;

FIG. 6 is a schematic structural view of an acoustic panel of the present invention with different cross-sectional shapes of the baffle;

FIG. 7 is a schematic view of the connection structure of the present invention with an exhaust duct;

FIG. 8 is a schematic structural diagram of a three-dimensional sound insulation layer according to the present invention;

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a cross-sectional view A-A of FIG. 9;

FIG. 11 is a schematic view of the baffle of the present invention having an angle α with the vertical plane;

fig. 12 is a schematic view of the sound-absorbing panel of the present invention at an angle β to the vertical plane.

Icon: 1-shell, 11-upper shell, 12-lower shell, 13-hook, 14-clamping strip, 15-slot, 2-air channel, 3-silencing plate, 31-framework, 32-guide plate and 4-exhaust air channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the present invention is used, the description is merely for convenience of describing the present invention and simplifying the description, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and operation, and thus, cannot be understood as the limitation of the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "configured," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 12, the present embodiment provides a noise reduction device, which can be used in, but not limited to, a dust collector, a sweeping robot, a range hood, an air purifier, a hand dryer, various air ducts, various fans, a fresh air system, etc. for convenience of description of the present embodiment, the present embodiment takes the dust collector as an example for the solution description.

The noise reduction device provided by the embodiment comprises a shell 1 and a noise reduction plate 3 arranged in the shell 1. The shell 1 can be an integrated hollow structure formed by 3D printing, the cross section of the shell can be square, round or other shapes, and the overall appearance of the shell 1 can be a straight cylinder shape, an arc shape or other shapes; the housing 1 may also be assembled in two halves or several parts. The channel in the casing 1 is the air duct 2 allowing the air flow to pass through, the casing 1 can be installed at the air inlet or the air outlet of the exhaust air duct 42 of the dust collector, and the connection between the casing 1 and the air outlet of the dust collector should be sealed. The noise elimination board 3 is equipped with 2 at least, and all noise elimination boards 3 all distribute along wind channel 2 extending direction, utilize noise elimination board 3 combination to constitute noise cancelling structure, realize making an uproar when the air current passes through. As shown in fig. 12, in each of the muffling plates 3 in the air duct 2, an included angle between the muffling plate 3 and a vertical plane is β, β is greater than or equal to 0 and less than 90 °, and included angles β between the adjacent 2 muffling plates 3 are the same or different, that is, the muffling plates 3 may be vertically or obliquely arranged in the air duct 2, the adjacent 2 muffling plates 3 may be parallel to each other, and the inclination angles and inclination directions of the adjacent 2 muffling plates 3 may be different from each other.

As shown in fig. 4 to 5, the sound-deadening plate 3 includes a framework 31 and a flow-guiding plate 32, and the framework 31 and the flow-guiding plate 32 may be integrally formed or may be assembled. The shape of the sound-deadening plate 3 may be a square shape, as shown in fig. 4, an arc shape, as shown in fig. 5, or any other shape such as a wave shape. The shape of the muffler plate 3 may be designed by those skilled in the art according to noise reduction effects, influence of the muffler plate 3 on air flow, space limitations, and the like. Guide plate 32 is equipped with 2 at least, and guide plate 32 all fixes on skeleton 31, and anechoic plate 3 is installed in wind channel 2, and when the air current was through anechoic plate 3, utilize guide plate 32 to separate the air current into a plurality of branches, if guide plate 32 is equipped with 3, the air current is then split into 4 branches, and guide plate 32 is equipped with 6, and the air current is then split into 7 branches. As shown in fig. 11, the included angle between the guide plate 32 and the vertical plane is α, 0 < α < 180 °, for the guide plate 32 on the same muffling plate 3, the included angles α of the adjacent guide plates 32 may be the same or different, that is, the guide plates 32 on the same muffling plate 3 may all be parallel to each other, or the included angles α of the guide plates 32 may all be different, and the length, thickness and cross-sectional shape of each guide plate 32 may be the same or different, as shown in fig. 6, the surface of the guide plate 32 may be a plane, an arc or other irregular figure. The number, shape and size of the baffles 32 on the silencer plate 3, and the arrangement position and angle of each baffle 32 can be designed by those skilled in the art according to the noise reduction effect, the influence of the baffles 32 on the air flow, the space limitation and other factors. As shown in fig. 8, for all the muffling plates 3 in the air duct 2, in 2 adjacent muffling plates 3, the included angles α of the flow guiding plates 32 are the same or different, that is, the included angles α of the flow guiding plates 32 on all the muffling plates 3 may be all the same, or the muffling plates 3 may be divided into 2 types or 3 types, etc., the included angles α of the flow guiding plates 32 in each type are the same, the included angles α of the flow guiding plates 32 on different types of muffling plates 3 are different, or the included angles α of the flow guiding plates 32 on all the muffling plates 3 may be different, as shown in fig. 8 to 10, the included angle of the flow guiding plate of the left muffling plate 3 is different from the included angle of the flow guiding plate of the right muffling plate 3, a sound insulation layer is formed by the arrangement and combination of a plurality of muffling plates 3, and as shown in fig. 8, a layer is a stereo sound insulation layer. The sound wave is the carrier of longitudinal wave and air current for the sound wave, when the air current passes through this noise elimination and noise reduction device, after all noise elimination board 3, guide plate 32 on the noise elimination board 3 can be divided into a plurality of branches to the air current, and the flow direction of air current has taken place several times and has changed, and to the local space between the guide plate 32 in the noise elimination board 3, because of the difference of the shape, length, width, thickness, angle of each guide plate 32, different local space therefore has different acoustic impedance characteristics, can take place reflection and interfere when the space of sound wave through different acoustic impedance, and then reach the effect of making an uproar.

It should be noted that the arrangement and combination of the sound-absorbing plates 3 form one or more layers of three-dimensional sound-absorbing layers, as shown in fig. 8 to 10, which is one of the reasons why the noise reduction device 6 has noise reduction effect. For a longer air duct, the noise reduction device 6 in this embodiment is installed at a position close to the noise source, and the obtained noise reduction effect is better.

The anechoic plate 3 can be integrally formed with the shell 1, if the anechoic plate is manufactured by 3D printing and forming, the anechoic plate 3 can be detachably connected with the shell 1, if the anechoic plate 3 and the shell 1 are respectively processed, the anechoic plate 3 is assembled with the shell 1, so that the anechoic plate 3 can be conveniently detached, and replacement and maintenance of the anechoic plate 3 are facilitated. The present embodiment will be described below by taking as an example a structure in which the noise cancellation plate 3 and the housing 1 are assembled in a separate manner.

As shown in fig. 1 to 3, the housing 1 includes an upper housing 11 and a lower housing 12, and the upper housing 11 is snap-fit connected to the lower housing 12. Specifically, go up casing 11 and be equipped with a plurality of elastic pothooks 13, lower casing 12 is equipped with the card strip 14 with pothook 13 lock, when going up casing 11 and lower casing 12 amalgamation, realizes going up casing 11 and lower casing 12's being connected through pothook 13 and the lock of card strip 14, when casing 11 and lower casing 12 were gone up in needs split, utilized the instrument to prize pothook 13, made pothook 13 break away from card strip 14, can make go up casing 11 and lower casing 12 separation. In order to install the noise elimination plate 3 in the shell 1 and realize the fixation of the noise elimination plate 3, the inner walls of the upper shell 11 and the lower shell 12 are respectively provided with a slot 15, when the upper shell 11 and the lower shell 12 are spliced, the slot 15 in the upper shell 11 and the lower shell 12 is combined into a slot which is connected end to end and surrounds the outer part of the framework 31, when the noise elimination plate 3 is installed, the framework 31 of the noise elimination plate 3 can be firstly inserted into the slot 15 in the lower shell 12, the upper shell 11 is covered on the lower shell 12, and the framework 31 of the noise elimination plate 3 is inserted into the slot 15 of the upper shell 11 until the upper shell 11 and the lower shell 12 are spliced.

In the embodiment, by arranging the noise reduction device comprising the shell 1 and the noise reduction plate 3, the shell 1 is internally provided with the air duct 2, the noise reduction plate 3 is provided with 2 or more than 2 flow guide plates 32, the flow guide plates 32 at least divide the air flow entering the air duct 2 into 3 air flow branches, and meanwhile, the flow direction of the air flow is changed by the flow guide plates 32, so that the sound wave is reflected and interfered in the shell 1; in the air duct 2 in the casing 1, the noise elimination plate 3 is at least provided with 2 blocks along the extending direction of the air duct 2, so that the air flow entering the air duct 2 is at least divided for 2 times, and for the local space among the guide plates 32 in the noise elimination plate 3, different local spaces have different acoustic impedance characteristics due to the difference of the shape, length, width, thickness and angle of each guide plate 32, when sound waves pass through the spaces with different acoustic impedance, the sound waves can be reflected and interfered, and the noise reduction effect is further achieved; in addition, in the embodiment, the plurality of sound-absorbing plates are arranged and combined to form one or more layers of three-dimensional sound-absorbing layers, so that the noise-absorbing and noise-reducing device has the noise-reducing effect. Compared with the prior art, this embodiment can replace sound absorbing material to reach the purpose of making an uproar falls in the amortization, and can avoid silencing device inside because of the humidity mildenes and rot or the peculiar smell, avoids reducing noise reduction effect because of piling up of dust.

It should be noted that, in this embodiment, both the housing 1 and the noise reduction plate 3 may be designed to be a washable and replaceable component, and the material may be a hydrophobic and oleophobic material such as teflon, ceramic, etc., or a transparent material, so that the noise reduction plate 3 in this embodiment may be applied to doors and windows in the building field, and taking a window as an example, the window glass is designed to be the structure of the noise reduction plate 3 in this embodiment, so as to meet the requirements of lighting and ventilation, and have the noise reduction effect.

The noise reduction device according to the present embodiment may be made of any solid material and has a noise reduction function. Therefore, acid-proof materials, alkali-proof materials, aging-resistant materials, mildew-resistant materials, high-temperature-resistant materials and the like can be selected according to application scenes to manufacture the noise reduction device with the proper physical and chemical properties.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.