Silencing device for air inlet of fan

Abstract

The utility model relates to the technical field of fan air inlet noise elimination, in particular to a fan air inlet noise elimination device which comprises an outer cylinder, a plurality of arc-shaped baffles are fixed to the position, close to one end, of the inner side of the outer cylinder, a conical shell is arranged beside the arc-shaped baffles, and a cross-shaped noise elimination plate is fixed to the position, located beside the arc-shaped baffles, of the inner side of the outer cylinder. The fan silencer solves the problems that an existing fan silencer is single in silencing mode, and noise cannot be further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fan air inlet silencers, in particular to a fan air inlet silencer device. Background Art

[0002] A fan muffler is a device used to reduce the noise generated by a fan during operation. It is mainly composed of noise-reducing materials and structures. By absorbing and reducing the noise emitted by the fan, it reduces noise pollution to the surrounding environment.

[0003] Existing fan silencers are generally sound-absorbing silencers, which use sound-absorbing materials to reduce the spread of noise. The noise reduction effect is relatively simple and cannot further reduce the noise. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing fan muffler has a relatively single silencing mode and cannot further reduce the noise.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is a fan inlet silencer, including an outer cylinder, a plurality of arc-shaped baffles are fixed on the inner side of the outer cylinder near one end, the arc-shaped baffles are fixed obliquely, a conical shell is provided next to the plurality of arc-shaped baffles, and a cross silencer is fixed on the inner side of the outer cylinder next to the arc-shaped baffle.

[0006] As a further solution of the present invention: both ends of the conical shell are respectively fixed to the inner side of the outer cylinder and one side of the arc-shaped baffle through support rods.

[0007] As a further solution of the present invention: a hollow area is opened inside the outer tube, and the hollow area is filled with sound insulation filling to reduce the volume.

[0008] As a further solution of the present invention: a sound insulation layer is fixed on the side of the cross silencer plate to reduce the noise volume.

[0009] As a further solution of the present invention: a plurality of hollow grids are fixed on the side surface of one end of the outer cylinder to help reduce noise and improve the flow characteristics of the airflow through the muffler.

[0010] Compared with the prior art, the advantages of the present invention are as follows: the present patent adds an arc baffle and a conical shell. When the noise enters the outer cylinder and contacts the arc baffle, the arc surface of the arc baffle will cause the sound waves to rebound irregularly, and a part of them will enter the conical shell and continue to rebound, thereby consuming the kinetic energy of the noise propagation, thereby reducing the noise. A cross silencer is added, and the cross silencer provided with a sound insulation layer can further weaken the attenuated noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0012] Figure 1 It is a whole structure perspective view of the fan air inlet silencer device of the present application.

[0013] Figure 2 It is a partial structure sectional view of the fan air inlet silencer device of the present application.

[0014] Figure 3 It is a conical shell installation position schematic view of the fan air inlet silencer device of the present application.

[0015] Figure 4 It is a cross silencer plate installation position schematic view of the fan air inlet silencer device of the present application.

[0016] In the drawings:

[0017] 1, outer cylinder; 2, cross silencer plate; 3, sound insulation filling; 4, hollow lattice; 5, arc baffle; 6, conical shell. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] The present application provides a technical solution: in order to solve the existing problems proposed in the background art.

[0020] In combination with the accompanying Figure 1-4 It can be known that the device comprises an outer cylinder 1, a plurality of arc baffles 5 are fixed on the inner side of the outer cylinder 1 close to one end, the arc baffles are fixed obliquely, which can weaken noise, a conical shell 6 is arranged beside the arc baffles 5, and a cross silencer plate 2 is fixed on the inner side of the outer cylinder 1 beside the arc baffles 5.

[0021] The conical shell 6 is fixed on the inner side of the outer cylinder 1 and one side of the arc baffles 5 through support rods at both ends; a hollow area is formed in the inner part of the outer cylinder 1, and sound insulation filling 3 is filled in the hollow area, which can slow down the volume; a sound insulation layer plate is fixed on the side surface of the cross silencer plate 2, which is used to slow down the noise volume; a plurality of hollow lattices 4 are fixed on the side surface of one end of the outer cylinder 1, which are used to help reduce noise and improve the flow characteristics of airflow through the silencer.

[0022] The working principle of this application is: when silencing, first fix one end of the outer cylinder 1 close to the cross silencer plate 2 at the air inlet of the fan, and then when the fan enters the air, the wind will first enter the side direction through the hollow grid 9. After being guided by the hollow grid 9, the wind will pass between the outer cylinder 1 and the conical shell 6, and then blow to the side of the arc baffle 5. The sound waves generated by the incoming wind will be dispersed when encountering the arc baffle 5, and then part of the sound waves will enter the conical shell 6 for further silencing, and finally further silenced by the cross silencer plate 2 and the sound insulation layer.

[0023] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A fan inlet silencer device, comprising an outer cylinder (1), characterized in that: A plurality of arc-shaped baffles (5) are fixed on the inner side of the outer cylinder (1) near one end. The arc-shaped baffles (5) are fixed obliquely. A conical shell (6) is provided on one side of the arc-shaped baffles (5). A cross-silencer plate (2) is fixed on the inner side of the outer cylinder (1) next to the arc-shaped baffles (5).

2. A fan air inlet silencer according to claim 1, characterized in that: The two ends of the conical shell (6) are respectively fixed to the inner side of the outer cylinder (1) and one side of the arc-shaped baffle (5) through support rods.

3. The fan inlet silencer according to claim 1, characterized in that: A hollow area is provided inside the outer cylinder (1), and the hollow area is filled with a sound insulation filler (3).

4. The fan inlet silencer according to claim 1, characterized in that: A sound insulation layer is fixed on the side of the cross sound-absorbing plate (2).

5. The fan inlet silencer according to claim 1, characterized in that: A plurality of hollow grids (4) are fixedly provided on the side surface of one end of the outer cylinder (1).

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