TWM569825U - Box-silencer structure - Google Patents

Abstract

The present invention is a speaker structure, which is connected to an air duct that needs to guide airflow for air intake and exhaust air movement; the speaker structure includes an outer casing that is open at both ends and surrounds a chamber, and Extending in an extending direction for guiding the airflow; the chamber is provided with a muffling module, comprising two first muffling plates arranged at intervals, the two first muffling plates extending along the extending direction, and The first muffling plates are respectively connected by a fixing plate on the upstream side and the downstream side of the airflow, so that a first cavity is formed between the two first muffling plates, wherein at least one second muffling is disposed in the first cavity. a plate, the second muffling plate is disposed perpendicular to the first muffler plate and the extending direction; each of the first muffling plates is provided with a plurality of penetrating micropores, each of which is perpendicular to the extending direction, and each micro The diameter of the perforation is less than or equal to the thickness of the first muffler plate; the elimination speaker of the present invention is not limited to the installation of the deflection angle of the air duct.

Description

Speaker structure

This creation is related to noise muffling devices, especially a muffler that is connected to the air duct of an air device to reduce the noise generated when entering or exhausting air.

In the space environment where wind pressure equipment (such as air blower, air compressor) is required to guide the airflow for air intake and exhaust air, there is a duct for airflow, but the mechanical and wind noise of the wind pressure equipment It will be conducted along the duct to each air outlet. To this end, a silencer can be installed in the duct to block the propagation of sound waves to reduce noise while allowing airflow to maintain the peace of the environment and the health of workers.

FIG. 1 is a conventional speaker 5 having a housing 51 that is open at both ends, and is provided with at least one muffling module 52. The muffling module 52 includes perforations spaced apart on both sides. The plate 53 is a plate in which a plurality of perforations 54 are evenly distributed, and a cavity 55 is formed between the two perforated plates 53, wherein the cavity 55 is filled with a porous material 56 (such as glass wool). According to this structure, the airflow and mechanical and wind cutting noise of the wind pressure device are transmitted to the air outlets along the air duct. When the airflow and sound waves pass through the speaker 5 in the air duct, the perforation 54 of the perforated plate 53 can be passed through, and when the through hole 54 passes through the hole wall, friction is generated, and then enters the cavity 55 and then hits the hole. The material 56 (glass wool) re-forms the effect of frictional heat generation, which in turn converts kinetic energy into heat energy for the purpose of reducing noise.

In the structure of the conventional speaker, the diameter of the hole of each of the perforations 54 of the perforated plate 53 is much larger than the thickness of the plate of the perforated plate 53. For example, when the thickness of the case 51 is 1 mm, the perforation is 5 mm. 54 has a diameter of 1.5 mm or more, and when the sound energy of the sound wave is heated by contact with the glass wool 56 (or rock), the kinetic energy is converted into heat energy consumption to achieve the sound-absorbing effect. by The glass wool 56 filled between the two perforated plates 53 is a kind of rock which is crushed into powder by limestone, pyrophyllite, quartz sand, boehmite, fluorite, etc., and stirred evenly with sodium sulfate, thenardite and the like. Artificial synthetic fibers made by melt-blowing, although they are not as high-risk as asbestos as a substitute for asbestos, have also been shown to have lung, skin and eye damage to workers who have been exposed to long-term exposure. It is recommended to avoid using it.

In view of this, how to improve the above problems is the primary issue that the creative office wants to solve.

The main purpose of the present invention is to provide a speaker structure, which is connected to the air duct by a silencing module composed of a micro-perforated plate, so that the sound wave noise caused by the wind pressure device is hindered when flowing in the air duct. The kinetic energy is reduced to heat energy to reduce the noise.

For the purpose of the foregoing, the present invention provides a speaker structure comprising: an outer casing that is open at both ends, wherein the outer casing has a solid surface and is surrounded by a chamber; the outer casing An extending direction for guiding the airflow and the sound wave to flow along the extending direction; a silencing module disposed in the chamber, comprising two first sound-absorbing panels arranged at intervals, the two first sound-absorbing panels And extending along the extending direction, and the two first sound absorbing panels are respectively connected by a fixing plate on the upstream side and the downstream side of the airflow, so that a first cavity is formed between the two first sound absorbing panels, and each of the first sound absorbing panels is provided. a plurality of through microperforations, each microperforation is perpendicular to the extending direction, and each microperforation has a diameter less than or equal to a thickness of the first muffling plate; and the first cavity is further provided with at least one second muffler The second muffler board is disposed perpendicular to the first muffler plate and the extending direction, so that the first muffling board and the second muffling board form a plurality of first silencing spaces, thereby increasing the sound wave. Heat energy consumption.

For the purpose of the foregoing, the present invention further provides at least a third sound absorbing panel having the same structure as the first sound absorbing panel, and the third sound absorbing panel is disposed in the first silencing space, and simultaneously The first sound absorbing panel and the second sound absorbing panel are vertically disposed, and the extension The directions are arranged in parallel, and the microperforation on the third muffler plate is perpendicular to the extending direction.

In the foregoing configuration, the two sides of the chamber are respectively provided with one side silencing module, and each side of the muffling module includes a side muffling board having the same structure as the first muffling board, and the side muffler board and the outer box case are The second cavities are separated, and the side muffler plates are respectively fixed on the upstream side and the downstream side of the airflow by a side fixing plate, and the side muffling plates are provided with a plurality of penetrating micropores, and each microperforation is perpendicular to the extending direction.

In the foregoing configuration, the second cavity is further provided with at least one fourth muffler plate, wherein the fourth muffler plate is perpendicular to the side muffler plate and the extending direction, so that the side muffler plate and the first muffler plate A plurality of second silencing spaces are formed between the four sound absorbing panels.

In the above configuration, the surfaces of the second silencing board, the third silencing board, and the fourth silencing board are dense.

In the above configuration, the second sound absorbing panel and the fourth sound absorbing panel are identical in structure to the first sound absorbing panel, that is, the second sound absorbing panel and the fourth sound absorbing panel are provided with a plurality of penetrating micropores; the second sound absorbing panel, Each microperforation in the fourth muffler is in the same direction as the extension direction.

In the above configuration, the first silencing board, the second silencing board, the third silencing board, the fourth silencing board, and the side muffling board are in a flat shape.

In the above configuration, the direction in which the outer casing extends is a straight line direction.

In the above configuration, the first muffler plate and the side muffler plate are curved plates having a curved arc direction.

In the foregoing configuration, when the speaker is assembled, it is not limited to the installation of the deflection angle of the air duct, for example, the speaker is rotated at an angle of 90 degrees with respect to the air duct.

The above objects and advantages of the present invention are not to be understood in detail from the detailed description and the accompanying drawings.

1‧‧‧Outer casing

11‧‧ ‧ room

2‧‧‧Damping module

21‧‧‧First silencer

22‧‧‧ Fixed plate

23‧‧‧First cavity

24‧‧‧Microperforation

25‧‧‧second silencer

26‧‧‧Microperforation

27‧‧‧The first silencing space

28‧‧‧ Third silencer

3‧‧‧Side silencer module

31‧‧‧Side silencer

32‧‧‧Side fixing plate

33‧‧‧Second cavity

34, 36‧‧‧ micro-perforation

35‧‧‧fourth silencer

37‧‧‧Second silencer space

4‧‧‧ duct

D1‧‧‧ extending direction

D2‧‧‧ curved direction

D‧‧‧diameter

T‧‧‧thickness

1 is a perspective exploded view of a conventional structure; FIG. 2 is a perspective view of a first embodiment of the present invention; 3 is a perspective exploded view of the first embodiment of the present invention; FIG. 4 is a schematic cross-sectional view of a portion A in FIG. 3; FIG. 5 is a schematic view showing the state of use of the first embodiment of the present invention; 2 is a schematic exploded view of a second embodiment; FIG. 8 is a schematic view showing a state of use of a second embodiment of the present invention; FIG. 8 is a perspective view of a third embodiment of the present invention; FIG. 9 is a schematic cross-sectional view showing a fourth embodiment of the present invention.

Referring to Figures 2 and 3, the first embodiment of the speaker structure provided for the present invention includes an outer casing 1, at least one muffling module 2 and two side muffling modules 3. The outer casing 1 is a square casing which is open at both ends and extends along an extending direction D1, and surrounds a chamber 11 which is respectively connected to the air duct (not shown) The airflow and sound waves in the air duct can enter the chamber 11, and the airflow and sound waves are guided to flow in the extending direction D1. In the present embodiment, the outer casing 1 may be made of a metal plate or a plastic plate, but is not limited thereto, and is configured to extend in a straight line direction.

In this embodiment, the muffling module 2 has two, which are located in the chamber 11 and do not rest on the left and right sides of the outer casing 1, and are disposed at intervals. Each of the muffling modules 2 includes two first muffling plates 21 and two fixing plates 22 disposed at intervals. The first muffling plate 21 is a flat plate and extends along an extending direction D1 of the outer casing 1 , that is, The outer casing 1 is in the same direction of the straight line, and the two first muffling plates 21 are respectively connected by the fixing plate 22 on the upstream side and the downstream side of the sound wave, thereby forming a hollow structure surrounded by four sides, and defining two first silencers. A first cavity 23 is formed between the plates 21, and at least one second muffling plate 25 is disposed in the first cavity 23, wherein the second muffler plate 25 is coupled to the first muffler plate 21 and the extending direction D1 is vertically disposed such that a plurality of first silencing spaces 27 are formed between the first muffler board 21 and the second muffling board 25.

The first muffler plate 21 is provided with a plurality of micro-perforations 24, as shown in FIG. Each micro-perforation 24 is disposed perpendicular to the surface of the first sound-damping plate 21, and the diameter d of each micro-perforation 24 is less than or equal to the plate thickness t of the first sound-absorbing plate 21. For example, the first muffling plate 21 has a plate thickness t of 1 mm, and each of the micro perforations 24 has a diameter d of less than or equal to 1 mm. According to the orientation of the first silencing panel 21 and the directivity of the microperforation 24 in the first silencing panel 21, referring to FIG. 5, each microperforation 24 is perpendicular to the extending direction D1 of the outer casing 1. .

As shown in the second and third embodiments, the two side muffler modules 3 are disposed in the chamber 11 at the left and right sides of the outer casing 1, and have a side sound absorbing panel 31 and two a side fixing plate 32, wherein the side muffling plate 31 has the same structure as the first muffling plate 21, that is, has a plurality of micro-perforations 34, which are spaced apart from the outer casing 1 to define a second a cavity 33 (see FIG. 5), and the side muffler plate 31 is fixed to the outer casing 1 by the side fixing plate 32 on the upstream side and the downstream side of the air flow, respectively, and in the second cavity 33 At least one fourth sound absorbing panel 35 is disposed, wherein the fourth sound absorbing panel 35 is disposed perpendicular to the side sound absorbing panel 31 and the extending direction D1, so that the side sound absorbing panel 31 and the fourth sound absorbing panel 35 are interposed. A plurality of second silencing spaces 37 are formed.

With the above configuration, the present embodiment is as shown in Fig. 5 in actual use. The two ends of the outer casing 1 are respectively connected to the air duct 4, so that the noise sound waves in the air duct 4 enter the chamber 11, and the outer casing 1 flows the guiding airflow and the noise sound wave along the extending direction D1 thereof. . At this time, in addition to the advancement, the sound wave flows into the first cavity 23 laterally through the plurality of microperforations 24 of the first muffling plate 21 of the muffling module 2, and the side of the muffling board 31 via the side of the side muffling module 3. A plurality of micro-perforations 34 flow laterally into the second cavity 33, thereby causing sound waves to impinge on the walls of the micro-perforations 24, 34 to form a frictional heat generation, thereby converting the kinetic energy of the sound waves into heat energy, thereby reducing noise. efficacy.

The figure shown in Fig. 6 is the second embodiment of the creation. This embodiment is based on the structure of the first embodiment described above, and the second muffler plate 25 has the same structure as the first muffling plate 21 described above, that is, has a plurality of micro-perforations 26, and the second muffler plate 25 It is disposed perpendicular to the first muffler board 21. According to the orientation of the second muffler plate 25 and the directivity of the micro-perforation 26 in the second muffler plate 25, referring to FIG. 7, the micro-perforation 26 of the second muffler plate 25 and the outer casing are known. The extension direction of 1 is the same direction.

Similarly, the fourth sound absorbing panel 35 has the same function as the first sound absorbing panel 21 described above. The structure has a plurality of micro-perforations 36, and the fourth muffler plate 35 is disposed perpendicular to the side muffler plate 31.

According to the orientation of the fourth muffling plate 35 and the directivity of the micro-perforation 36 in the fourth muffling plate 35, referring to FIG. 7, the micro-perforation 36 of the fourth muffling plate 35 and the outer casing are known. The extension direction of 1 is the same direction.

Accordingly, in the present embodiment, as shown in FIG. 7, when the acoustic noise flows along the extending direction D1 of the outer casing 1, in addition to the flow state as in the first embodiment described above, The micro-perforations 24 of the muffler board 21 and the micro-perforations 24 and 36 of the side muffler plates 31 respectively enter the airflow of the first cavity 23 and the second cavity 33, and then pass through the micro-perforations 26 of the second muffler plate 25 and The micro-perforation 36 of the fourth sound-damping plate 35, so that the airflow generates more impact than the first embodiment, and generates more heat energy by friction, thereby reducing more air flow energy and reducing noise. The effect is more significant.

Also shown in Figures 8 and 8a is the third embodiment of the creation. This embodiment is changed on the basis of the structure of the foregoing embodiment. In this embodiment, the present invention further provides at least a third sound absorbing panel 28 having the same structure as the first sound absorbing panel 21, and the third sound absorbing panel 28 is disposed in the first silencing space 27 And being disposed perpendicularly to the first muffling plate 21 and the second muffling plate 25, and disposed in parallel with the extending direction D1, and the micro-perforation on the third muffling plate 28 is in the extending direction D1 Vertical setting.

Furthermore, the person shown in Fig. 9 is the fourth embodiment of the creation. This embodiment changes the direction in which the first muffling board 21 and the side muffling board 31 extend based on the structure of the foregoing embodiment. In the present embodiment, the first sound absorbing panel 21 and the side sound absorbing panel 31 are curved plates having a curvature corresponding to the bending direction D2, and are thus applicable to the curved section of the air duct.

In the above configuration, the outer casing 1 has a surface which is dense, that is, the outer casing 1 has no perforations on its surface.

In the above configuration, the first cavity 23 does not have a filler.

In the above configuration, the second cavity 33 does not have a filler.

When the outer casing 1 is assembled, it is not limited to the installation of the deflection angle of the air duct 4. For example, the outer casing 1 is rotated at an angle of 90 degrees with respect to the duct 4.

However, the above description of the embodiments is merely illustrative of the present invention and is not intended to limit the present invention. Therefore, the replacement of equivalent elements should still be within the scope of the present invention.

In summary, it can be made clear to the skilled person that the creation can achieve the aforementioned objectives, and it has already met the requirements of the Patent Law and submitted an application according to law.

Claims (12)

The utility model relates to a speaker structure, which comprises: an outer casing opened at two ends, wherein the outer casing encloses a chamber; the outer casing extends along an extending direction for guiding airflow and noise sound waves along the extending direction a sound absorbing module is disposed in the chamber, and includes: two first sound absorbing panels, wherein the two first sound absorbing panels are spaced apart, and the two first sound absorbing panels extend along the extending direction, and two The first muffler plate is respectively connected by a fixing plate on the upstream side and the downstream side of the airflow and the noise sound wave, so that a first cavity is formed between the two first muffling plates; and each of the first muffling plates is provided with a plurality of through holes. Microperforation, each microperforation is perpendicular to the extending direction, and each of the microperforations has a diameter less than or equal to a thickness of the first muffling plate; at least one second muffling plate is disposed in the first cavity The second sound absorbing panel is disposed perpendicular to the first sound absorbing panel and the extending direction, so that the first sound absorbing panel and the second sound absorbing panel form a plurality of first silencing spaces. The speaker structure of claim 1 , wherein the two sides of the chamber are respectively provided with one side silencer module, and each side silencer module comprises a side silencer board having the same structure as the first sound insulation board, the side The sound absorbing panel is separated from the outer casing by a second cavity, and the side sound absorbing panels are respectively fixed to the outer casing by a side fixing plate on the upstream side and the downstream side of the airflow. The speaker structure of claim 1 or 2, wherein the second muffler plate has the same structure as the first muffler plate, and the axial direction of the microperforation of the second muffler plate is in the same direction as the extending direction. The speaker structure of claim 2, wherein the second cavity is further provided with at least one fourth muffler plate, the fourth muffler plate is perpendicular to the side muffler plate and the extending direction, A plurality of second silencing spaces are formed between the side muffler board and the fourth muffler board. The speaker structure of claim 4, wherein the fourth sound absorbing panel has the same structure as the first sound absorbing panel, and the axial direction of the microperforation of the fourth sound absorbing panel is in the same direction as the extending direction. The speaker structure of claim 1 , wherein the first silencing space is further provided with at least one third muffling board, the third muffling board having the same structure as the first muffling board, and the first muffling board The second muffler plates are vertically disposed and disposed in parallel with the extending direction, and the micro-perforation lines on the third muffler plate are disposed perpendicular to the extending direction. The speaker structure of claim 3, wherein the first sound absorbing panel, the second sound absorbing panel, and the third sound absorbing panel are in a flat shape. The speaker structure of claim 1 or 2, wherein the outer casing extends in a straight line direction. The speaker structure of claim 1 or 2, wherein the first muffler plate and the side muffler plate are curved plates having a curved arc direction. The speaker structure of claim 1 or 2, wherein the outer casing surface is dense. The speaker structure of claim 1 or 2, wherein the speaker is not limited to the installation of the deflection angle of the air duct when assembled. The speaker structure of claim 11, wherein the relative angle of deflection of the speaker and the air duct when installed is 90 degrees.