TWI392838B - Whistle box structure - Google Patents

Description

Speaker structure

The present invention relates to a speaker structure, and in particular, to a simple speaker structure having high noise reduction efficiency.

Today's fluid conditioning systems have operational noise problems. Taking the blower as an example, the source of the noise is divided into two types, one is structural noise and the other is pneumatic noise.

The formation of structural noise usually has a vibration source. The vibration source drives the vibration source itself or its surrounding structure to vibrate to form noise. When the noise is suppressed, the source of the noise source can be suppressed according to its cause, which is limited in difficulty.

The formation of aerodynamic noise, mainly due to the airflow flowing in the middle of the fan blade passage, is more likely to be generated when the airflow leaves the trailing end of the blade; the airflow passing through the impeller is compressed to make the surrounding gas The pressure thus creates a rapid change to form a noise; as the airflow is subjected to periodic pressure changes by impacting the blades to form a specific frequency of noise.

It is not easy to find out the actual cause of the aerodynamic noise from the aerodynamic noise itself. Therefore, instead of directly suppressing the noise, the more effective method is to use a silencer to handle such noise. Pneumatic noise.

In view of the above, the object of the present invention is to provide a speaker structure that can reduce the generation of aerodynamic noise, and to effectively handle the above-mentioned aerodynamic noise with its simple design.

The details and the drawings are further understood.

In view of the above, one aspect of the present invention is to provide a speaker structure for reducing the generation of aerodynamic noise, comprising: a box body and a connecting portion.

The first opening portion and the second opening portion are respectively disposed at two ends of the box body and penetrate each other for a fluid to circulate, the first One of the effective widths of the opening is less than one of the depths of the case. The connecting portion connects the box body and a tube body.

In addition, in practical applications, the ratio of the effective width to the depth of the box is 1:2 to 1:5.

Furthermore, the cross-sectional area of the first opening portion perpendicular to the flow direction of the fluid is larger than the cross-sectional area of the tube body perpendicular to the flow direction of the fluid.

In addition, a cross-sectional area of the first opening portion perpendicular to the fluid flow direction and a cross-sectional area of the second opening portion perpendicular to the fluid flow direction are with.

In addition, in practical applications, the box further includes a plurality of sound absorbing members, each of the sound absorbing members being disposed on a surface of the inner portion of the box, wherein the plurality of sound absorbing members are horizontally arranged with each other. Further, the sound absorbing member is made of a metal plate having a hole-like structure, a glass fiber cloth, a sound absorbing cotton or other porous sound absorbing material.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

The main scope of the present invention is to provide a simple speaker structure with high silencing efficiency for reducing the generation of aerodynamic noise.

Please refer to FIG. 1 and FIG. 2 together. FIG. 1 is a schematic diagram of a speaker structure and a configuration thereof according to an embodiment of the present invention. Figure 2 is a partial cross-sectional view taken along line X-X of Figure 1.

In accordance with a preferred embodiment of the present invention, the speaker 1 is a hollow cabinet structure for reducing noise generated when fluid enters or exits the fluid conditioning system. The speaker 1 described above includes a case 10, a connecting portion 20, and a sound absorbing member 30.

Moreover, the fluid conditioning system described above (not shown) typically includes at least one conduit 50 for the input or output of fluid to draw or discharge fluid through conduit 50 to achieve fluid flow in a designated space. In the present embodiment, the above flow system refers to air, however it is not necessary for air, and it may be any gas, gaseous substance or a mixture of the above. In the specific embodiment, the fluid regulating system is a blower, but it may also be a cold air, an air conditioner, an internal combustion engine or other system for forcibly convecting a fluid.

The casing 10 of the above-described speaker 1 includes a first opening 12 and a second opening 14. The first opening portion 12 and the second opening portion 14 are respectively disposed at both ends of the casing 10 and penetrate each other to allow the fluid to flow therethrough. The flow direction 22 of the body is parallel to the direction in which the tubular body 50 extends.

In this embodiment, the cross-sectional area of the first opening portion 12 of the casing 10 that is perpendicular to the fluid flow direction 22 can be surrounded by the second opening portion 14 perpendicular to the flow direction 22 of the fluid. The cross-sectional areas are the same to form a rectangular box 10. However, the shape of the box is not necessarily rectangular, but also various geometric shapes. The cross-sectional area described above does not include the area occupied by the casing 10.

Both ends of the connecting portion 20 are connected to the above-described case 10 and the tube body 50 so that the internal spaces of the elements penetrate each other to allow fluid to flow between the case 10 and the tube 50 in the extending direction of the respective elements.

In the specific embodiment, the second opening portion 14 of the speaker 1 is connected to the tubular body 50 through the connecting portion 20. However, the connecting portion 20 may also be connected to the first opening portion 12 of the speaker 1 according to the design of the speaker.

In the embodiment, the connecting portion 20 and the casing 10 are integrally formed, and an adhesive material is applied to the common surface of the connecting portion 20 and the tubular body 50 for fixing the connecting portion 20 and the tubular body 50. The relative position, at the same time, is used to close the gap between the contact interfaces to be an airtight space. However, it is not necessary to utilize the sealing material, and it may also be connected by means of welding, mechanism or other conventional techniques. The above-described connecting portion 20 and the casing 10 are not necessarily integrally formed.

The speaker 1 includes a plurality of the above-mentioned sound absorbing members 30, and the plurality of sound absorbing members 30 are disposed on the inner surface of the casing 10. The sound absorbing members 30 can be, but are not limited to, two that are simultaneously contacted and fixed in the interior of the casing. On the corresponding surface, the surfaces of the above-mentioned case that are in contact with the sound absorbing member 30 are inside. Furthermore, each of the silencing elements 30 is disposed in parallel with each other.

The sound absorbing member 30 is made of a sound absorbing material made of a metal plate having a hole-like structure, a glass fiber cloth, a sound absorbing cotton or other porous sound absorbing material.

Furthermore, in the specific embodiment, the cross-sectional area of the first opening portion 12 perpendicular to the flow direction 22 of the fluid is larger than the flow direction 22 of the tube 50 perpendicular to the fluid. The sectional area is increased to increase the flow rate of the fluid flowing through the casing and to fill the cross-sectional area occupied by the sound absorbing member 30 at both ends of the casing 10. The sectional area described above does not include the area occupied by the casing 10.

Referring to FIG. 3, FIG. 3 is a schematic diagram of a structure of a speaker according to an embodiment of the present invention. The casing 10 further includes a first surface 16, a second surface 17, a depth 18, and an effective width 19.

The area of the first surface 16 is the cross-sectional area of the casing 10 which is perpendicular to the flow direction 22 of the fluid. The calculation of the area of the first surface 16 does not include the area occupied by the casing 10, so as to further clarify the above. The surface indicated by the first surface 16 is indicated by a diagonal line in the figure.

The second surface 17 is the surface of the interior of the casing 10 that is in contact with the sound absorbing member 30.

The depth 18 is the sum of the lengths of the casing 10 and the connecting portion 20 in the direction of the fluid flow, and the depth directly affects the manner of the gas flow and the noise cancellation effect of the speaker.

The effective width 19 refers to one of the surfaces of the sound absorbing member 30 in contact with the inside of the casing 10, and the length at which the second surface 17 meets the first surface 16, minus the remaining value of the length of the sound absorbing structure 30.

Referring to FIG. 3 again, the effective width 19 is the sum of the width components 192. By changing the effective width 19 of the box, the fluid flow and noise of the casing 10 will also change. It is proportional to the fluid flow that can be accepted in the same unit time.

The ratio of the effective width 19 to the depth 18 described above directly affects the silencing performance of the speaker 1 . The effective width 19 of the first opening portion 12 should be smaller than the housing 10 The depth is 18.

In order to optimize the silencing performance of the speaker 1, when the ratio of the effective width 19 to the depth 18 of the cabinet 10 is 1:2 to 1:5, the silencing performance of the speaker 1 will be significantly improved. In the present embodiment, the ratio of the effective width 19 of the casing 10 to the depth 18 of the casing 10 is 1:3.

Referring to FIG. 4 and FIG. 5 together, FIG. 4 is a schematic diagram of a structure of a speaker according to another embodiment of the present invention, and FIG. 5 is a partial cross-sectional view taken along line X-X of FIG.

The main features of FIG. 4 and FIG. 5 are similar to the specific embodiments described above, and thus will not be further described herein. However, in the specific embodiment, the connecting portion 20 and the casing 10 of the speaker are manufactured separately and then connected to each other. The connection between the two can be made by adhesion, welding, mechanism or other conventional techniques.

In this embodiment, each of the connection interfaces is filled with a sealing material for fixing the relative positions of the components, and is also used to close the gap between the contact interfaces to form an airtight space, but not by using a sealing material. If necessary, it may also utilize welding, mechanism or other conventional techniques as a means of attachment.

Please refer to FIG. 6 and FIG. 7 together. FIG. 6 is a schematic diagram of a structure of a speaker according to another embodiment of the present invention, and FIG. 7 is a partial cross-sectional view taken along line X-X of FIG.

The main features of FIG. 6 and FIG. 7 are similar to the foregoing specific embodiments, and thus will not be further described herein. However, in the present embodiment, the connecting portion 20 of the speaker and the casing 10 are integrally formed, and the cross-sectional areas of the two elements that are perpendicular to the flow direction 22 of the fluid are the same.

In the embodiment, the two ends of the connecting portion 20 are respectively connected to the first opening portion 12 of the casing 10 and the pipe body 50, so that the internal spaces of the components penetrate each other to allow fluid to flow between the casing 10 and the pipe body 50. Flows in the direction in which the above components extend. Adhesive, welding, mechanical or other conventional techniques can be used between components Connected.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

1‧‧‧Speaker

10‧‧‧ cabinet

12‧‧‧ first opening

14‧‧‧Second opening

16‧‧‧ first surface

17‧‧‧ second surface

18‧‧‧depth

19‧‧‧effective width

192‧‧‧width component

20‧‧‧Connecting Department

22‧‧‧ Flow direction

30‧‧‧Damping components

50‧‧‧ tube body

FIG. 1 is a schematic diagram of a speaker structure and a configuration thereof according to an embodiment of the present invention.

Figure 2 is a partial cross-sectional view taken along line X-X of Figure 1.

FIG. 3 is a schematic diagram of a structure of a speaker according to an embodiment of the present invention.

4 is a schematic view showing the structure of a speaker of another embodiment of the present invention.

Figure 5 is a partial cross-sectional view taken along line X-X of Figure 4.

Fig. 6 is a schematic view showing the structure of a speaker of another embodiment of the present invention.

Figure 7 is a partial cross-sectional view taken along line X-X of Figure 6.

1‧‧‧Speaker

10‧‧‧ cabinet

16‧‧‧ first surface

17‧‧‧ second surface

18‧‧‧depth

19‧‧‧effective width

192‧‧‧width component

20‧‧‧Connecting Department

30‧‧‧Damping components

Claims (4)

The utility model relates to a speaker structure for reducing the generation of aerodynamic noise, which comprises: a box body, the box body comprises a first opening portion and a second opening portion, wherein the first opening portion and the second opening portion are respectively provided The two ends of the first opening portion have an effective width smaller than a depth of the one of the cabinets, and the ratio of the effective width to the depth of the box is 1:2. Up to 1:5; a plurality of sound absorbing members, each of the sound absorbing members being disposed on a surface of the interior of the casing, the plurality of sound absorbing members being horizontally arranged; and a connecting portion disposed at the first portion of the casing The two openings are connected to the box body and a tube body; wherein the flow system enters the box body from the first opening portion and is outputted from the second opening portion to be sent to the tube body via the connecting portion. The speaker structure of claim 1, wherein a cross-sectional area of the first opening perpendicular to a flow direction of the fluid is greater than a cross-sectional area of the tube perpendicular to a flow direction of the fluid. . The speaker structure of claim 1, wherein a cross-sectional area of the first opening portion perpendicular to the fluid flow direction and a cross-sectional area of the second opening portion perpendicular to the fluid flow direction are provided. the same. The speaker structure of claim 1, wherein the sound absorbing member is made of a porous sound absorbing material.