CN211011863U

CN211011863U - Active noise reduction device

Info

Publication number: CN211011863U
Application number: CN201921507478.8U
Authority: CN
Inventors: 孙自宾
Original assignee: Shenzhen Beidou Xingyao Technology Co ltd
Current assignee: Shenzhen Beidou Xingyao Technology Co ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-07-14
Anticipated expiration: 2029-09-10

Abstract

An active noise reduction device is characterized in that an inner shell is arranged in a device shell, sound absorption materials and/or vibration reduction materials are filled between the inner shell and the outer shell, an integrated beam is further arranged in the inner shell, two ends of the integrated beam are arranged on the inner side wall of the device shell, and an input device and an output device which are used for active noise reduction are arranged on the integrated beam. The utility model discloses in will initiatively fall the centralized setting of input device and the output device of making an uproar and set up on same one line through integrated roof beam, can reduce sheltering from to the air-out area. The integrated beam can be used for wiring, so that messy wiring can be avoided under the condition that the air outlet area cannot be reduced, and new noise generated by messy wiring under the action of air flow is avoided. The utility model discloses the inlayer casing can be adjusted according to the product demand and mutual noninterference, is applicable to the earlier stage production or the later stage assembly of equipment such as tuber pipe machine, central air conditioning, new trend system simultaneously.

Description

Active noise reduction device

Technical Field

The utility model relates to a noise control field especially relates to a device of making an uproar falls in initiative.

Background

High-end residences or office buildings and hotels requiring quality are particularly concerned about indoor comfort, wherein noise is one of core evaluation indexes. However, the noise is inevitable for the air outlet and the air inlet of the central air conditioner, the air duct machine or the indoor heating and ventilation system.

For the above problems, an active noise reduction technique is currently used in a relatively effective manner. However, the active noise reduction structure disclosed in the prior art is relatively simple. For example, in some existing devices, the sound cavity housing is directly fixed in an outer box of the air duct device, and the acquisition sensors such as a microphone are fixed in some positions according to actual needs.

Moreover, because the existing active noise reduction device does not have a uniform centralized processing mode, the existing active noise reduction device is expensive in process cost no matter the existing active noise reduction device is assembled before being used for mass production products of manufacturers such as air conditioners, air ducts and the like or is assembled at a later stage for various types of equipment which are already put into use.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects existing in the prior art, the utility model aims to provide an active noise reduction device. The noise problem of air outlet, air intake can be solved through the technique of making an uproar of falling voluntarily in this application, is applicable to the earlier stage production and the later stage assembly of equipment such as tuber pipe machine, central air conditioning, new trend system.

In order to achieve the above object, the utility model provides a pair of active noise reduction device, it includes: a device housing; the device shell, set up in the device shell, the device shell with it has sound absorbing material and/or damping material to fill between the inlayer casing, be provided with in the inlayer casing: the two ends of the integrated beam are arranged on the inner side wall of the inner shell; input means for acquiring noise; the output device is used for sending out a noise reduction signal; the input device and the output device are both arranged on the integrated beam.

Optionally, in the active noise reduction device, the number of the inner shells is 1 or more, the side wall of each inner shell is respectively an arc-shaped wall, the arc-shaped wall is respectively provided with a plurality of holes, the sound absorption material and/or the vibration reduction material is arranged between the arc-shaped wall and the device housing, and the sound absorption material and/or the vibration reduction material can fully contact with the air flow through the holes to absorb noise.

Optionally, foretell initiative noise reduction device, wherein, each be formed with the contained angle between the arc wall of inlayer casing, the arc wall of inlayer casing with between the device shell respectively, the hole sets up the position of contained angle, sound absorbing material and/or damping material fill the contained angle with between the device shell, noise absorption and buffer structure vibration.

Optionally, in the above active noise reduction device, the input device is located in front of the output device along the airflow direction.

Optionally, the active noise reduction device further includes an input device bracket, and the input device is connected to the integration beam through the input device bracket.

Optionally, the active noise reduction device further includes an output device bracket, and the output device is connected to the integrated beam through the output device bracket.

Optionally, in the active noise reduction device, the output device further includes an output device sound cavity, and the output device sound cavity just contains the air duct area occupied by the input device in the air duct.

Optionally, in the active noise reduction device, the output device bracket and the integrated beam are integrated into a whole, or are separated; the sound cavity of the output device and the integrated beam are integrated or split.

Optionally, in the active noise reduction device, an installation groove is formed in the integrated beam, and is used for accommodating a line of the active noise reduction device.

Optionally, the active noise reduction device further includes a central control unit, which is mounted on the device housing or the integrated beam.

Compared with the prior art, the utility model has the following technical effects:

1. the utility model discloses a device of making an uproar falls in initiative is provided with the inlayer casing in the device shell, fills sound absorbing material and/or damping material between the two, wherein, still be provided with integrated roof beam in the inlayer casing, the both ends setting of integrated roof beam is on the inside wall of device shell, and set up input device and the output device who is used for making an uproar falls in the initiative on the integrated roof beam. The utility model discloses in will initiatively fall the centralized setting of input device and the output device of making an uproar and set up on same one line through integrated roof beam, can reduce sheltering from to the air-out area. The integrated beam can be used for wiring, so that messy wiring can be avoided under the condition that the air outlet area cannot be reduced, and new noise generated by messy wiring under the action of high-speed airflow is avoided. The utility model discloses the inlayer casing can be according to the product demand adjustment and mutual noninterference, and it has higher integrated level, is applicable to the earlier stage production or the later stage assembly of equipment such as tuber pipe machine, central air conditioning, new trend system simultaneously. Which can adjust the number of inner shell channels that fit into the device as needed during assembly.

2. Further, the utility model discloses in be used for the input device and the centralized setting of output device that initiatively fall and make an uproar on a sharp integrated roof beam, can reduce the air-out area that input, output device occupied to, integrated beam structure wherein can also be used for the wiring, avoids walking the line in disorder under the condition that does not reduce air-out area, avoids in disorder walking the line and produces new noise under high velocity air's effect.

3. The integrated beam can be further arranged in the middle of the channel of the inner shell, so that after the integrated beam is arranged, noise reduction waves output by the output device can be fully mixed and interfered with noise sound waves, and the noise reduction effect is further improved.

4. In addition, still further set up passive sound absorbing material and/or damping material between the passageway of device inlayer casing and the device shell all around in this application, further promote noise reduction effect. Wherein, for promoting the sound absorption effect, inlayer casing can set up the hole to make sound absorbing material and/or damping material fully contact with the air current in the passageway. And the sound absorption material and/or the vibration reduction material can further provide support between the inner layer shell and the device shell, and new noise caused by vibration between structures is avoided.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the invention for the purpose of explanation and not limitation of the invention. In the drawings:

fig. 1 is a schematic view of an installation manner of the active noise reduction device of the present invention;

fig. 2 is a schematic view of the overall structure of the active noise reduction device of the present invention;

fig. 3 is a rear view of the active noise reducer of the present invention;

fig. 4 is a left side view of the active noise reduction device of the present invention.

In the figure, 1 denotes a device housing, 2 denotes an integration beam, 3 denotes an input device, 31 denotes an input device holder, 4 denotes an output device, 41 denotes an output device holder, and 42 denotes an output device sound chamber; 5 denotes an inner shell; and 51 denotes a hole.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

The meaning of "inside and outside" in the present invention means that the direction from the device housing to the inside of the inner shell is inside, and vice versa, relative to the active noise reduction device housing itself; and not to the specific limitations of the device mechanism of the present invention.

The term "connected" as used herein may mean either a direct connection between elements or an indirect connection between elements through other elements.

The utility model provides a device of making an uproar falls in initiative, the direct embedded air outlet in tuber pipe machine, central air conditioning, the especially centralized new trend system of its accessible mode shown in figure 1, perhaps the air intake. The air inlet and the air outlet can be directly connected with the air inlet and the air outlet of any equipment which is put into use. The installation mode includes but is not limited to inner nesting, outer nesting, sticking of adhesive material, buckling and the like. Referring to fig. 2, the active noise reduction apparatus includes:

a device housing 1;

the inner shell 5 is arranged in the device shell 1, sound absorption materials and/or vibration reduction materials are filled between the device shell 1 and the inner shell 5, and the inner shell 5 is internally provided with:

the two ends of the integrated beam 2 are arranged on the inner side wall of the inner shell 5;

an input device 3 for acquiring noise;

an output device 4 for emitting a noise reduction signal;

the input device 3 and the output device 4 are both arranged on the integration beam 2. The input device and the output device are connected with the central control unit, and the central control unit drives the output device to send out a corresponding noise reduction signal according to the noise signal obtained by the input device so as to realize active noise reduction.

The arc-shaped channels formed by the inner shell 5 are used as a group, and any number of input devices and output devices can be arranged in each group of the devices according to the requirements, particularly the requirements of an air outlet or an air inlet. The input device is further connected with an input device bracket 31, and the output device is further connected with an output device bracket 41 and an output device sound cavity 42. The integration beam 2 can be used to centrally arrange the output device sound cavity 42, the input device support 31, the output device 4, the input device 3, and the output device support 41.

In a preferred manner, the inlet device 3 is arranged in front of the outlet device 4 in the direction of the air flow. The input device 3 is connected to the integration beam 2 via the input device bracket 31, while the output device 4 is similarly connectable to the other side of the integration beam 2 in the air flow direction via the output device bracket 41.

The input device can be a microphone, a vibration collection sensor device and the like, so as to collect noise sound waves or noise sound fields. The output device can be generally selected to be a loudspeaker or other forms of output for realizing noise reduction sound waves. The output device, typically a loudspeaker or the like, is also provided with an output device sound cavity 42. The output device bracket 41 can be integrated with the integrated beam 2 or separated from the integrated beam, and the output device sound cavity 42 can also be integrated with the integrated beam 2 or separated from the integrated beam. In order to reduce the occupation of the air duct area, the output device sound cavity 42 is arranged in the air duct of the air duct machine, the central air conditioner and the air outlet or the air inlet of the fresh air system and is just set to contain the air duct area occupied by the input device 3. In order to further reduce the occupation of the air duct area, reduce the influence on the air outlet or the air inlet and reduce the structural vibration caused by blocking the air flow, the connecting line between the input device 3 and the output device 4 can be completely and intensively fixed on the integrated beam 2, thereby reducing the wiring complexity.

Furthermore, still can further be provided with the mounting groove on above-mentioned integrated beam 2 for hold the circuit of initiative noise reduction device, with the whole embedded in integrated beam 2 supports of walking of each circular telegram device, reduce each circular telegram device and the area that exposes of line in the wind channel, reduce the risk that structural vibration produced.

In one implementation, the active noise reduction device includes 1 or more integrated beams and a duct channel formed by the inner shell. And sound absorption materials and/or vibration reduction materials are/is arranged between the device shell and the inner shell. The side walls of the inner shell 5 are arc-shaped walls, the radian of the arc-shaped walls is not limited, the arc-shaped walls mainly need to be considered to meet the fluid mechanics requirement, and obvious protruding structures are not included. The arc-shaped wall can be further provided with a plurality of holes 51 respectively, the sound absorption material and/or the vibration reduction material are/is arranged between the arc-shaped wall and the device shell 1, and the sound absorption material is fully contacted with the air flow through the holes 51, so that the sound absorption material and/or the vibration reduction material can further realize passive noise reduction, and the noise reduction effect is further improved. The number and position of the holes can be adjusted as required.

In particular, referring to fig. 3, included angles are respectively formed between the arc-shaped walls of the inner shells 5 and the device casing 1, the holes 51 can be generally disposed at the included angles and arranged in the structure shown in fig. 4, and the sound absorbing material and/or the vibration absorbing material is filled between the included angles and the device casing 1 to absorb noise and provide buffering between the device casing and the inner shells, so as to reduce the noise of structural vibration.

In the above active noise reduction device, the number of the input devices 3 and the output devices 4 is not limited, and the vertical position of the integration beam 2 should not be limited as well. Preferably, the integration beam 2 may be disposed at a central position of the device housing 1 or the inner shell, or disposed on a central axis thereof, so that the noise reduction sound waves output by the output device 4 can be sufficiently mixed and interfered with the noise sound waves in the device air duct to further improve the noise reduction effect.

The air duct structure formed by the device housing 1 or the inner shell 5 of the device should not be limited to a rectangular structure like that shown in fig. 3. The air inlet and the air outlet can be freely adjusted according to the shape of the air outlet or the air inlet.

One current economical way is to produce and then assemble the various components that the device contains separately. But this tends to introduce structural vibrations that generate additional structural vibration noise. In this regard, it is preferable that the integration beam is integrally formed with the input device bracket 31 and the output device bracket 41. Therefore, the structure is integrally formed, so that gaps generated by assembling of parts can be effectively avoided, and new noise generated by vibration between the two parts in the gaps is avoided. The integrated beam can be transversely arranged in the inner shell 5, and can also be vertically or obliquely arranged in an air duct formed by the air inlet or the air outlet and the device shell according to actual requirements.

In the above apparatus, a separate central control unit may be provided. The central control unit is independently connected with electricity to control the switch of the central control unit, so that the synthesis and control of noise reduction sound waves are realized. In other implementation manners, the central control unit of the active noise reduction device may also be integrated with the control unit of the noise-reduced device, so as to perform power connection and switch control. The central control unit may be mounted on the device housing 1 or the integration beam 2.

The utility model has the advantages that:

through integrated roof beam 2 with input device 3 and output device 4 set up in concentrated, make it be in same straight line, overlap the shared passage area of both, reduce sheltering from the air-out area, and make and to arrange input device 3 and output device 4's wiring can follow the recess of integrated roof beam 2 in order, can not additionally occupy the air-out area, can avoid the air-out area to be crowded by equipment and occupy, and can not produce new noise under the effect of air current because of walking in disorder of line. The invention can simultaneously reduce the noise of the air outlet and the air inlet of the air duct machine, ensure that the air quantity is not lost while the noise is reduced, and the air outlet area is not extruded.

And, the utility model discloses a device of making an uproar falls in initiative, its inside inlayer casing corner is handled for the circular arc formula, is filled by sound absorbing material and/or damping material between the contained angle that circular arc and device shell formed, from this, do not disturb each other between the passageway that every inlayer casing formed, can strengthen the noise reduction effect to a certain extent, and, because the utility model discloses a have relatively independent characteristic between each passageway, it more is applicable to the inconsistent sight of air outlet length between hotel's office building, and it can be according to the size of actual air outlet or air intake and adjusting device's passageway quantity. In addition, the device can be assembled according to actual needs, is applied to air outlets or air inlets with various lengths, and realizes noise reduction of equipment such as a central air conditioner, an air duct machine and a centralized fresh air system.

This the utility model discloses an all with input device and output device integration to an integrated roof beam in every passageway, the speaker is at the rear along the air current direction, and input device is in the front portion along the air current direction, also is exactly that input device sets up with output device is opposite, has guaranteed the effective collection of noise simultaneously and to falling the effective output of the sound wave of making an uproar. Because output device sound chamber 42 has just contained the shared area of original input device 3, the utility model discloses can effectively reduce and fall the device of making an uproar and block in the wind channel. In addition, the connecting line between the input device and the output device can be completely and intensively fixed in the groove of the integrated beam, so that the wiring complexity can be reduced.

Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. 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.

Claims

1. An active noise reduction device, comprising:

a device housing (1);

inner shell (5), set up in device shell (1), device shell (1) with it has sound absorbing material and/or damping material to fill between inner shell (5), be provided with in inner shell (5):

the two ends of the integrated beam (2) are arranged on the inner side wall of the inner shell (5);

input means (3) for acquiring noise;

an output device (4) for emitting a noise reduction signal;

the input device (3) and the output device (4) are both arranged on the integrated beam (2).

2. The active noise reduction device according to claim 1, wherein the number of the inner shells (5) is 1 or more, the side wall of each inner shell (5) is respectively configured as an arc-shaped wall, the arc-shaped wall is respectively provided with a plurality of holes (51), and the sound absorption material and/or the vibration reduction material are/is disposed between the arc-shaped wall and the device housing (1), and are/is fully contacted with the air flow through the holes (51) to absorb noise.

3. The active noise reduction device according to claim 2, wherein included angles are formed between the arc-shaped walls of the inner shells (5) and the device housing (1), the holes (51) are arranged at the included angles, and the sound absorption material and/or the vibration absorption material are filled between the included angles and the device housing (1) to absorb noise and buffer structural vibration.

4. Active noise reduction device according to claim 1, characterized in that the input device (3) is located in front of the output device (4) in the direction of the air flow.

5. An active noise reduction device according to claim 1, characterized by an input device carrier (31), the input device (3) being connected to the integration beam (2) via the input device carrier (31).

6. An active noise reduction device according to claim 1, characterized by an output device support (41), the output device (4) being connected to the integration beam (2) through the output device support (41).

7. Active noise reduction device according to claim 6, characterized in that the output device (4) further comprises an output device sound cavity (42), the output device sound cavity (42) just containing the air duct area occupied by the input device (3) in the air duct.

8. Active noise reduction device according to claim 7, characterized in that the output device support (41) is integral with the integration beam (2), or split; the output device sound cavity (42) and the integrated beam (2) are integrated or split.

9. Active noise reduction device according to claim 1, characterized in that the integration beam (2) is provided with mounting slots for accommodating the wiring of the active noise reduction device.

10. An active noise reduction device according to claim 1, characterized by further comprising a central control unit mounted on the device housing (1) or the integration beam (2).