CN217481613U

CN217481613U - Noise elimination unit

Info

Publication number: CN217481613U
Application number: CN202220820685.4U
Authority: CN
Inventors: 易炬; 孙晓明
Original assignee: Suzhou Saiweisi Environmental Technology Co ltd
Current assignee: Suzhou Saiweisi Environmental Technology Co ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-09-23
Anticipated expiration: 2032-04-11

Abstract

The utility model discloses a noise elimination unit, which comprises a shell, wherein first perforated plates are arranged at two ends of the shell, a sound absorption material module and a noise elimination mechanism are arranged in the shell, the sound absorption material module and the noise elimination mechanism are arranged at intervals, and the sound absorption material module is in contact with the first perforated plates; the noise elimination mechanism includes frame, second perforated plate and hole post, the second perforated plate is installed at the frame both ends, frame internally mounted has a plurality of hole posts. The utility model uses the closing plate, the perforated plate, the sound absorbing material and the noise elimination mechanism to form a noise elimination unit; the noise reduction effect of the noise reduction unit on low-frequency noise is enhanced through the design of the noise reduction mechanism and the matching of the noise reduction mechanism, perforated plates with different thicknesses and apertures and sound absorption materials with different sound absorption characteristics.

Description

Noise elimination unit

Technical Field

The utility model relates to a noise control amortization correlation technique field specifically is a noise elimination unit.

Background

From a physiological point of view, all sounds that disturb people's rest, study and work and that interfere with the sound that people listen to, i.e. unwanted sounds, are collectively referred to as noise. Noise pollution is created when noise adversely affects people and the surrounding environment.

In the noise control engineering, the noise of a fan and an air duct can be reduced by combining a noise elimination unit into a sound absorption array. Most of the currently used silencing units adopt a mode of filling sound-absorbing materials in a perforated plate shell. A disadvantage of such a sound-damping unit is that the damping effect on low-frequency noise is not significant.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a noise elimination unit to solve the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: a silencing unit comprises a shell, wherein first perforated plates are installed at two ends of the shell, a sound absorbing material module and a silencing mechanism are arranged in the shell, the sound absorbing material module and the silencing mechanism are arranged at intervals, and the sound absorbing material module is in contact with the first perforated plates; the noise elimination mechanism includes frame, second perforated plate and hole post, the second perforated plate is installed at the frame both ends, frame internally mounted has a plurality of hole posts.

Preferably, an edge sound absorption module is arranged on the outer side of the frame and located between the shell and the frame.

Preferably, a plurality of second through holes are formed in the second perforated plate, and the second through holes in the second perforated plate and the column holes at the two ends are connected to form a communicating structure.

Preferably, the shell is formed by combining a plurality of sealing plates, and the external structures of the sound absorbing material module and the noise elimination mechanism are matched with the internal structure of the shell.

Preferably, a plurality of first through holes are formed in the first perforated plate.

Preferably, the sound-absorbing material module and the edge sound-absorbing module are made of one or both of foam and fiber.

Preferably, the sound-absorbing material module is externally coated with waterproof and dustproof cloth.

Compared with the prior art, the beneficial effects of the utility model are that: a sealing plate, a perforated plate, a sound absorbing material and a silencing mechanism form a silencing unit; the noise reduction effect of the noise elimination unit on low-frequency noise is enhanced through the design of the noise elimination mechanism and the matching of the noise elimination mechanism, perforated plates with different thicknesses and apertures and sound absorption materials with different sound absorption characteristics;

through the arrangement of the silencing mechanism and the combination with perforated plates with different apertures of the shell of the silencing unit, the silencing unit with stronger sound absorption effect aiming at low-frequency noise of a specific frequency band can be manufactured; the sound absorption array formed by combining the sound absorption units with different sound absorption characteristics can better control low-frequency noise;

the small hole injection noise elimination, the sound absorption of sound absorption materials, the resonance cavity noise elimination, the small hole frequency shift and the multi-impedance section noise elimination are combined, and the good integral noise reduction effect is achieved.

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, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

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

fig. 2 is an exploded view of the present invention;

FIG. 3 is a front view of the present invention;

fig. 4 is a cross-sectional view of the present invention;

fig. 5 is a schematic structural view of the noise elimination mechanism of the present invention;

fig. 6 is a sectional view of the muffler mechanism of the present invention;

fig. 7 is a schematic structural view of the interior of the noise elimination mechanism of the present invention.

In the figure: 1. a first perforated plate; 2. a housing; 3. a sound absorbing material module; 4. a noise elimination mechanism; 11. a first through hole; 21. closing the plate; 41. an edge sound absorption module; 42. a frame; 43. a second perforated plate; 44. a pore column; 431. a second via.

Detailed Description

To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Referring to fig. 1-7, in an embodiment of the present invention, a noise elimination unit includes a housing 2, first perforated plates 1 are installed at two ends of the housing 2, a sound absorption material module 3 and a noise elimination mechanism 4 are disposed inside the housing 2, the sound absorption material module 3 and the noise elimination mechanism 4 are disposed at intervals (the sound absorption material module 3 and the noise elimination mechanism 4 may be disposed in plural numbers as required, and the thicknesses of the sound absorption material module 3 and the noise elimination mechanism 4 may be the same or different), and what contacts with the first perforated plate 1 is the sound absorption material module 3 (the noise elimination mechanism 4 is prevented from directly contacting with the first perforated plate 1); the silencing mechanism 4 comprises a frame 42, a second perforated plate 43 and hole columns 44, wherein the second perforated plate 43 is arranged at two ends of the frame 42, and a plurality of hole columns 44 are arranged in the frame 42; the first perforated plate 1 and the second perforated plate 43 may be made of metal or nonmetal.

An edge sound absorbing module 41 is disposed outside the frame 42, and the edge sound absorbing module 41 is located between the housing 2 and the frame 42.

The second perforated plate 43 is provided with a plurality of second through holes 431, the second through holes 431 on the second perforated plate 43 are connected with the column holes to form a communicating structure, the second through holes 431 can be distributed at equal intervals or at unequal intervals, and the second through holes 431 can be circular holes or other holes.

The shell 2 is formed by combining a plurality of sealing plates 21, and the sealing plates can be made of metal or nonmetal; the external structures of the sound-absorbing material module 3 and the noise-eliminating mechanism 4 are matched with the internal structure of the casing 2.

A plurality of first through holes 11 are formed in the first perforated plate 1, the first through holes 11 can be distributed at equal intervals and also can be distributed at unequal intervals, and the first through holes 11 can be circular holes or other holes.

The sound-absorbing material modules 3 and the edge sound-absorbing modules 41 are made of one or both of foam and fiber.

The sound-absorbing material module 3 and the edge sound-absorbing module 41 are made of one or more of sound-absorbing materials such as PU foam, EPDM foam, melamine foam, glass wool, rock wool, PET felt and the like.

The outside cladding of sound absorbing material module 3 has waterproof dustproof cloth.

The silencing unit can be internally provided with a larger integral silencing mechanism or a plurality of small silencing mechanisms, and the small silencing mechanisms can be spliced into a large silencing mechanism by a splicing structure or distributed in the silencing unit; if the small-sized noise elimination mechanisms are adopted, the sizes and the structures of the small-sized noise elimination mechanisms can be the same or different; the noise elimination unit can also be internally provided with a plurality of larger integral noise elimination mechanisms which are arranged in a layered mode, each layer of noise elimination mechanism is separated by sound absorption materials, and the sizes and the structures of the plurality of larger integral noise elimination mechanisms can be the same or different.

The utility model discloses a theory of operation is: when the silencing unit is actually used, the perforated plate surface of the shell of the silencing unit is placed in the direction facing the propagation direction of the sound wave; a sealing plate, a perforated plate, a sound absorbing material and a silencing mechanism form a silencing unit; the noise reduction effect of the noise reduction unit on low-frequency noise is enhanced through the design of the noise reduction mechanism and the matching of the noise reduction mechanism, perforated plates with different thicknesses and apertures and sound absorption materials with different sound absorption characteristics; by arranging the silencing mechanism and combining with perforated plates with different apertures of the shell of the silencing unit, the silencing unit with stronger sound absorption effect on low-frequency noise of a specific frequency band can be manufactured; the sound absorption array formed by combining the sound absorption units with different sound absorption characteristics can better control low-frequency noise.

Finally, it should be noted 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. A sound-damping unit comprising a housing (2), characterized in that: the sound-absorbing device is characterized in that first perforated plates (1) are installed at two ends of the shell (2), sound-absorbing material modules (3) and a noise elimination mechanism (4) are arranged in the shell (2), the sound-absorbing material modules (3) and the noise elimination mechanism (4) are arranged at intervals, and the sound-absorbing material modules (3) are in contact with the first perforated plates (1); noise elimination mechanism (4) are including frame (42), second perforated plate (43) and hole post (44), second perforated plate (43) are installed to frame (42) both ends, frame (42) internally mounted has a plurality of hole posts (44).

2. A muffler unit as defined in claim 1, wherein: the side frame (42) is provided with the edge sound absorption module (41) on the outer side, and the edge sound absorption module (41) is located between the shell (2) and the side frame (42).

3. A sound-damping unit according to claim 1 or 2, characterized in that: a plurality of second through holes (431) are formed in the second perforated plate (43), and the second through holes (431) in the second perforated plate (43) are connected with the column holes at two ends to form a communicating structure.

4. A sound-damping unit according to claim 1, characterized in that: the shell (2) is formed by combining a plurality of close plates (21), and the external structures of the sound-absorbing material module (3) and the noise elimination mechanism (4) are matched with the internal structure of the shell (2).

5. A sound-damping unit according to claim 1, characterized in that: a plurality of first through holes (11) are formed in the first perforated plate (1).

6. A sound-damping unit according to claim 1, characterized in that: the sound-absorbing material module (3) and the edge sound-absorbing module (41) both adopt one or two of foam or fiber.

7. A sound-damping unit according to claim 1, characterized in that: the sound-absorbing material module (3) is coated with waterproof and dustproof cloth.