Reverse cone type silencer of fan

Abstract

The utility model relates to the technical field of fans, in particular to a fan silencer which comprises a silencing pipeline, and an inner cavity of the silencing pipeline is arranged to be of a reverse cone type structure with the opening area of one end being large and the opening area of the other end being small. The end with the large opening area is an air inlet of the silencing pipeline, the end with the small opening area is an air outlet of the silencing pipeline, and the air outlet is communicated with an air inlet of the fan. The air outlet of the silencing pipeline is in butt joint with the air inlet of the fan through the butt joint pipeline; the silencing pipeline is further covered with a cover which is called a flow guide cover, the flow guide cover covers the silencing pipeline, and the opening direction of the flow guide cover is consistent with the direction of an air outlet of the silencing pipeline. The inner wall of the flow guide cover and the outer wall of the silencing pipeline are provided with air circulation channels, and the channels are communicated with an air inlet of the silencing pipeline. The inner pipe wall and the outer pipe wall of the silencing pipeline are air circulation paths, the path of the silencing pipeline is prolonged, outward transmission of noise is reduced, and the silencing effect of the silencing pipeline can be guaranteed in a limited space.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan muffler. Background Art

[0002] The fan will generate a lot of noise when working. The muffler can effectively reduce the noise and improve the working environment.

[0003] However, the traditional front air intake muffler needs to be of sufficient length to ensure sufficient silencing effect. However, in special occasions, the limited space cannot provide sufficient silencing size, and a muffler that can ensure the silencing effect in a limited space is needed. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems existing in the prior art, the present utility model is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] Fan reverse cone silencer;

[0008] It includes a silencer pipe, wherein the inner cavity of the silencer pipe is configured as an inverted cone structure with a large opening area at one end and a small opening area at the other end;

[0009] The end with a larger opening area is the air inlet of the silencer duct, and the end with a smaller opening area is the air outlet of the silencer duct, and the air outlet is connected to the air inlet of the fan;

[0010] It also includes a docking pipe connecting the air outlet of the silencer pipe and the air inlet of the fan;

[0011] The muffler pipe is also covered with a cover, called a deflector cover, which covers the muffler pipe, and the opening direction of the deflector cover is consistent with the direction of the air outlet of the muffler pipe;

[0012] An air circulation channel is provided on the inner wall of the air guide cover and the outer wall of the silencer pipe, and the channel is communicated with the air inlet of the silencer pipe.

[0013] The above design, first of all, sets up a silencer duct with an inverted cone structure. Its structural feature is that the cross-section of the duct gradually becomes smaller from the inlet to the outlet, forming an inverted cone shape. This design can effectively reduce the turbulence and noise of the airflow, and reduce the noise generated when the airflow passes through the silencer duct; secondly, by setting up a docking duct, it is convenient to dock the air outlet of the silencer duct with the air inlet of the fan; finally, by setting up a guide cover, the direction of the air intake is changed, and the inner and outer pipe walls of the silencer duct are the path of air circulation, which extends the path of the silencer duct, reduces the transmission of noise to the outside, and can ensure the silencer effect of the silencer duct in a limited space.

[0014] Preferably, the inner cavity of the silencer pipe is arranged with at least 3 partitions, and each partition has a hole for air circulation in the middle; by setting multiple partitions to reduce the propagation path of sound waves, the noise can be effectively attenuated and the silencer effect of the silencer pipe can be effectively enhanced.

[0015] Preferably, the partition adopts an inverted cone structure, and the inverted cone structure of the partition is consistent with the inverted cone structure of the silencer pipe; the partition also adopts an inverted cone structure to further increase the silencer effect of the silencer pipe.

[0016] Preferably, the silencer pipe is a pipe with a sponge layer wrapped in a stainless steel mesh; the sponge layer reduces the propagation of noise by absorbing sound waves, especially when air flows through the pipe; the structure of the stainless steel mesh can prevent compression and deformation of the sponge layer, ensuring the durability of the silencer effect.

[0017] Preferably, the wall thickness of the silencer pipe is 2-4 cm, thereby ensuring the silencer effect of the silencer pipe.

[0018] Preferably, the air guide cover is provided with a connecting strip connected to the outer wall of the docking pipe, and there are at least two connecting strips; the connecting strips ensure that the air guide cover is stably connected to the docking pipe, reducing the noise generated by the vibration of the air guide cover due to the passage of airflow.

[0019] Preferably, the inner cavity of the air deflector is set to be a bowl-shaped with a diameter gradually increasing from the bottom to the opening; the bowl-shaped air deflector and the outside of the silencer pipe form an effect similar to an inverted cone structure channel, reducing the noise generated when the airflow passes through the silencer pipe.

[0020] Preferably, a layer of sponge is laid in the inner cavity of the deflector as a sound insulation layer; laying sponge in the deflector as a sound insulation layer can absorb sound waves and reduce the propagation of noise.

[0021] Preferably, the shell of the air deflector is made of aluminum alloy; the outer layer is made of aluminum alloy material, which has lightweight and corrosion-resistant properties.

[0022] Preferably, the width of the channel gap between the inner wall of the deflector and the outer wall of the silencer duct is not less than one-quarter of the minimum inner diameter of the silencer duct, ensuring that the flow channel air can pass through the channel gap smoothly and preventing the channel gap from being too small to affect the suction effect of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0024] Figure 1 A schematic structural diagram of a fan inverted cone silencer according to an embodiment of the present invention;

[0025] Figure 2 This is a structural schematic diagram of a fan inverted cone silencer according to an embodiment of the present invention being connected to a fan. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0029] Furthermore, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it necessarily refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Example 1

[0031] Reference Figure 1 and Figure 2, fan reverse cone silencer.

[0032] The muffler pipe 1 includes an inner cavity of the muffler pipe 1 configured as an inverted cone structure with a large opening area at one end and a small opening area at the other end;

[0033] The end with a larger opening area is the air inlet 11 of the silencer pipe 1, and the end with a smaller opening area is the air outlet 12 of the silencer pipe 1, and the air outlet 12 is connected to the air inlet of the fan 4; it also includes a docking pipe 3 that connects the air outlet 12 of the silencer pipe 1 and the air inlet of the fan 4; the silencer pipe 1 is also covered with a cover, called a guide cover 2, which covers the silencer pipe 1, and the opening direction of the guide cover 2 is consistent with the direction of the air outlet 12 of the silencer pipe 1; the inner wall of the guide cover 2 and the outer wall of the silencer pipe 1 have an air circulation channel, and the channel is connected to the air inlet 11 of the silencer pipe 1; first By setting up a silencer pipe 1 with an inverted cone structure, its structural feature is that the cross-section of the pipe gradually becomes smaller from the inlet to the outlet, forming an inverted cone shape. This design can effectively reduce the turbulence and noise of the airflow, and reduce the noise generated when the airflow passes through the silencer pipe 1; secondly, by setting up a docking pipe 3, it is convenient to dock the air outlet 12 of the silencer pipe 1 with the air inlet of the fan 4; finally, by setting up a guide cover 2, the direction of the air intake is changed, and the inner and outer pipe walls of the silencer pipe 1 are both the path for air circulation, extending the path of the silencer pipe 1 and reducing the external transmission of noise. It is a method that can ensure the silencer effect of the silencer pipe 1 in a limited space.

[0034] The inner cavity of the silencer pipe 1 is arranged with at least three partitions 5, and each partition 5 has a hole for air circulation in the middle; by arranging multiple partitions 5 to reduce the propagation path of sound waves, the noise can be effectively attenuated, and the silencer effect of the silencer pipe 1 can be effectively enhanced.

[0035] The partition 5 adopts an inverted cone structure, and the inverted cone structure of the partition 5 is in the same direction as the inverted cone structure of the silencer pipe 1; the partition 5 also adopts an inverted cone structure to further enhance the silencer effect of the silencer pipe 1.

[0036] The silencer pipe 1 is a pipe with a sponge layer wrapped in stainless steel mesh; the sponge layer reduces the propagation of noise by absorbing sound waves, especially when air flows through the pipe; the structure of the stainless steel mesh can prevent compression and deformation of the sponge layer, ensuring the durability of the silencer effect.

[0037] The wall thickness of the silencer pipe 1 is 2-4 cm, which ensures the silencer effect of the silencer pipe 1.

[0038] When in use, the docking duct 3 docks the air outlet 12 of the silencer duct 1 with the air inlet of the fan 4, and the fan inverted cone silencer is installed on the fan 4. When the fan 4 is working, the air flow first passes through the channel formed by the inner wall of the air guide cover 2 and the outer wall of the silencer duct 1, and then enters the air inlet 11 of the silencer duct 1, passes through the through holes of the three partitions 5, and then enters the air inlet of the fan 4 from the air outlet 12 of the silencer duct 1. When the air is flowing, the silencer duct 1 is designed in an inverted cone shape to promote a smooth transition of the air flow and reduce the noise caused by turbulence. The silencer duct 1 wrapped with a sponge layer of stainless steel mesh can effectively absorb sound waves and reduce noise propagation. Moreover, the sound generated by the fan 4 can pass through the multiple obstructions of the partition 5 to effectively improve the noise reduction effect. The inner and outer pipe walls of the silencer duct 1 are both the path of air circulation, extending the path of the silencer duct 1 and reducing the transmission of noise to the outside. It is a method that can ensure the silencer effect of the silencer duct 1 in a limited space.

[0039] Example 2

[0040] Reference Figure 1 and Figure 2 , which is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0041] The air deflector 2 is provided with a connecting strip connected to the outer wall of the docking pipe 3, and there are at least two connecting strips; the connecting strips ensure that the air deflector 2 is stably connected to the docking pipe 3, reducing the noise generated by the vibration of the air deflector due to the passage of airflow.

[0042] The inner cavity of the air deflector 2 is set to be a bowl-shaped with a diameter gradually increasing from the bottom to the opening; the bowl-shaped air deflector 2 and the outside of the silencer pipe 1 form an effect similar to an inverted cone structure channel, reducing the noise generated when the airflow passes through the silencer pipe 1.

[0043] A layer of sponge is laid in the inner cavity of the deflector 2 as a sound insulation layer; laying the sponge in the deflector 2 as a sound insulation layer can absorb sound waves and reduce the spread of noise.

[0044] The shell of the air deflector 2 is made of aluminum alloy; the outer layer is made of aluminum alloy material, which has the characteristics of light weight and corrosion resistance.

[0045] The width of the channel gap between the inner wall of the deflector 2 and the outer wall of the silencer pipe 1 is not less than one-quarter of the minimum inner diameter of the silencer pipe 1; this ensures that the flow channel air can pass through the channel gap smoothly, and prevents the channel gap from being too small to affect the suction effect of the fan 4.

[0046] When in use, the air deflector 2 is welded to the docking pipe 3 with a connecting strip. The air deflector 2 is stably connected to the docking pipe 3 to reduce the noise generated by the vibration of the air flow passing through the air deflector. The bowl-shaped air deflector 2 and the outside of the silencer pipe 1 form an effect similar to an inverted cone structure channel, reducing the noise generated when the air flow passes through the silencer pipe 1. Sponge is laid inside the air deflector 2 as a sound insulation layer to absorb sound waves and reduce the spread of noise.

[0047] It is important to note that the configuration and arrangement of the present application, as illustrated in various exemplary embodiments, are illustrative only. Although only a few embodiments are described in detail in this disclosure, those reading this disclosure should readily appreciate that numerous modifications are possible without materially departing from the novel aspects and advantages of the subject matter described herein. For example, variations in the size, dimensions, structure, shape, and proportions of various components, as well as parameter values ​​such as temperature, pressure, mounting arrangements, use of materials, color, and orientation are possible. For example, components shown as integrally formed may be constructed from multiple parts or components, the positions of components may be inverted or otherwise altered, and the nature, number, or position of discrete components may be modified or changed. Therefore, all such modifications are intended to be encompassed within the scope of this disclosure. The order or sequence of any process or method steps may be altered or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover structures that perform the functions described herein, and not only structural equivalence but also structural equivalents. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of this disclosure. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0048] Additionally, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiment may not be described, ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention.

[0049] It should be understood that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. The fan reverse cone silencer is characterized by: It includes a silencer pipe, wherein the inner cavity of the silencer pipe is configured as an inverted cone structure with a large opening area at one end and a small opening area at the other end; The end with a larger opening area is the air inlet of the silencer duct, and the end with a smaller opening area is the air outlet of the silencer duct, and the air outlet is connected to the air inlet of the fan; It also includes a docking pipe connecting the air outlet of the silencer pipe and the air inlet of the fan; The muffler pipe is also covered with a cover, called a deflector cover, which covers the muffler pipe, and the opening direction of the deflector cover is consistent with the direction of the air outlet of the muffler pipe; An air circulation channel is provided on the inner wall of the air guide cover and the outer wall of the silencer pipe, and the channel is communicated with the air inlet of the silencer pipe.

2. The fan inverted cone silencer according to claim 1, characterized in that: The inner cavity of the silencer pipe is arranged with at least three partitions, and each partition has a hole for air circulation in the middle.

3. The fan inverted cone silencer according to claim 2, characterized in that: The partition adopts an inverted cone structure, and the inverted cone structure of the partition is consistent with the inverted cone structure of the silencer pipe.

4. The fan inverted cone silencer according to claim 1, characterized in that: The muffler pipe is a pipe with a sponge layer wrapped with a stainless steel mesh.

5. The fan inverted cone silencer according to claim 1, characterized in that: The wall thickness of the silencer pipe is 2-4 cm.

6. The fan inverted cone silencer according to claim 1, characterized in that: The deflector cover is provided with a connecting strip connected to the outer wall of the docking pipe, and at least two connecting strips are provided.

7. The fan inverted cone silencer according to claim 1, characterized in that: The inner cavity of the deflector is configured to be in a bowl-shaped shape with a diameter gradually increasing from the bottom to the opening.

8. The fan inverted cone silencer according to claim 1, characterized in that: A layer of sponge is laid in the inner cavity of the deflector as a sound insulation layer.

9. The fan inverted cone silencer according to claim 1, characterized in that: The shell of the air guide cover is made of aluminum alloy.

10. The fan inverted cone silencer according to claim 1, characterized in that: The width of the channel gap between the inner wall of the deflector and the outer wall of the silencer pipe is not less than one quarter of the minimum inner diameter of the silencer pipe.

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