Cotton-free multi-layer structure fan noise reduction box

Abstract

The utility model discloses a cotton-free multi-layer structure fan noise reduction box, which comprises a middle shell, a bottom shell, a top cover, an air inlet, an air outlet, a top cover, a bottom cover, a top cover, a bottom cover, a bottom cover, a bottom cover and a bottom cover, and is characterized in that the middle of the side wall of the bottom shell is provided with an air inlet in a penetrating manner; the prefabricated through groove is formed in the bottom of the inner side of the bottom shell in a penetrating mode, and a connecting through pipe is arranged at the right end of the inner side of the bottom shell; the air resistor is clamped in the top cover; and the first isolation cavity is formed in the left side of the interior of the bottom shell, and the interiors of the middle shell and the top cover communicate with a second isolation cavity. The utility model belongs to the technical field of turbofans, and aims to solve the problems that in the prior art, noise reduction cotton can absorb dust in air more easily during use, and meanwhile, the noise reduction cotton needs to be disassembled and replaced during use. The silencer has the technical effects that under the condition that the noise is reduced, inconvenience caused by using silencing cotton is avoided, and meanwhile, the assembling difficulty and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine fans, in particular to a fan noise reduction box with a cotton-free multi-layer structure. Background Art

[0002] The turbine fan is the power source for the flow of gas in the ventilator and is also the main source of ventilator noise. For existing ventilator products, the noise generated by the turbine fan is mainly reduced by internal shielding and absorption by sound-absorbing cotton. The respiratory products currently on sale are mainly reduced by installing sound-absorbing cotton inside the noise reduction box and installing the turbine fan in the noise reduction box. The sound-absorbing cotton is a porous sponge-like elastic material. The essence of sound is vibration waves transmitted by air. When the noise of the turbine fan reaches the sound-absorbing cotton, it is further blocked, dispersed and absorbed through elastic absorption and reflection and diffraction in the small chamber, thereby reducing noise.

[0003] Traditional silencer cotton is more likely to absorb dust in the air and accumulate in its porous structure when in use. Combined with the temperature inside the noise reduction box, moisture in the air will enter the tiny cavity of the silencer cotton, which may breed bacteria and cause certain health risks. At the same time, the lifespan of silencer cotton is generally lower than that of a ventilator. It may age during use and needs to be disassembled and replaced, which is very inconvenient. Utility Model Content

[0004] To this end, the utility model provides a cotton-free multi-layer structure fan noise reduction box to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] According to the first aspect of the utility model, a cotton-free multi-layer structure fan noise reduction box comprises:

[0007] The middle shell is adapted to be connected to the outer side of the upper end of the bottom shell, and the outer side of the upper end of the middle shell is adapted to be connected to the top cover, and an air inlet is opened through the middle of the side wall of the bottom shell;

[0008] A prefabricated through groove is formed through the inner bottom of the bottom shell, and a connecting through pipe is provided at the inner right end of the bottom shell;

[0009] The air resistance is clamped and arranged inside the top cover, and a mounting cavity is opened in the middle of the inner side of the bottom shell, and the turbine blower body which is also located in the bottom shell is installed inside the mounting cavity;

[0010] The first isolation chamber is opened on the left side of the bottom shell, and the interiors of the middle shell and the top cover are connected to each other to form a second isolation chamber.

[0011] Furthermore, sealing members are provided inside the connection parts between the bottom shell and the middle shell, and between the middle shell and the top cover, and the bottom shell, the middle shell and the top cover are connected.

[0012] Furthermore, a guide vane is integrally fixedly installed in the middle of the bottom of the bottom shell, and the guide vane is located directly below the turbine blower body.

[0013] Furthermore, the first isolation cavity is connected to the prefabricated through groove.

[0014] Furthermore, an air outlet is provided through the middle of the side wall of the top cover, and the air outlet is communicated with the connecting through pipe.

[0015] Furthermore, the second isolation chamber is provided with three sections respectively inside the middle shell and the top cover, and an annular channel structure is provided inside the top cover.

[0016] The utility model has the following advantages:

[0017] 1. Through the first isolation cavity and the second isolation cavity, the second isolation cavity is respectively provided with 3 sections inside the middle shell and the top cover. According to calculation, it can be concluded that increasing the number of partitions can significantly improve the sound insulation effect;

[0018] 2. Through the bottom shell, middle shell and top cover, the risk of dust accumulation and bacteria breeding caused by the use of sound-absorbing cotton can be avoided while reducing the noise of the turbine fan body. At the same time, the installation steps of the sound-absorbing cotton are reduced, and the difficulty and cost of assembly are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An overall diagram of a cotton-free multi-layer structure fan noise reduction box provided in some embodiments of the utility model.

[0020] Figure 2 A top view of a cross-sectional view of a cotton-free multi-layer structure fan noise reduction box provided in some embodiments of the utility model.

[0021] Figure 3 A front cross-sectional view of a cotton-free multi-layer structure fan noise reduction box provided in some embodiments of the utility model.

[0022] Figure 4 A top view of the connection between the bottom shell and the support strips of the cotton-free multi-layer structure fan noise reduction box provided in some embodiments of the utility model.

[0023] Figure 5 A front view of a cotton-free multi-layer structure fan noise reduction box provided in some embodiments of the utility model.

[0024] In the figure: 1, bottom shell, 2, middle shell, 3, top cover, 4, sealing member, 5, air inlet, 6, air outlet, 7, prefabricated through groove, 8, connecting through pipe, 9, air resistance, 10, installation cavity, 11, guide vane, 12, turbine blower body, 13, first isolation cavity, 14, second isolation cavity. DETAILED DESCRIPTION

[0025] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figures 1 to 5 As shown, the cotton-free multi-layer structure fan noise reduction box in the embodiment of the first aspect of the utility model includes: a middle shell 2, the outer side of the upper end of which is adapted to be connected with the middle shell 2, and the outer side of the upper end of the middle shell 2 is adapted to be connected with the top cover 3, the middle shell 2 and the top cover 3 are sequentially installed on the outer side of the upper end of the bottom shell 1, so that the air circulation channel can be realized through the combination of the three major parts to form a multi-layer direct barrier around the turbine fan body 12, and at the same time, the bottom shell 1 and the middle shell 2 and the middle shell 2 and the top cover 3 are connected. The sealing member 4 is arranged inside, which is convenient for improving the tightness of the connection, and then the bottom shell 1 and the middle shell 2 and the middle shell 2 and the top cover 3 are fixed respectively by screws;

[0028] The middle shell 2 and the top cover 3 are connected to each other and are provided with a second isolation chamber 14. The second isolation chamber 14 is provided with three sections respectively inside the middle shell 2 and the top cover 3, and an annular channel structure is provided inside the top cover 3. According to the sound intensity calculation formula, it can be calculated that increasing the number of interlayers can significantly improve the sound insulation effect. In addition, based on the sound absorption principle of the Helmholtz resonance cavity and the structural design, three buffer resonance chambers are arranged at different positions of the noise reduction box to achieve drastic changes in the positions of multiple cross sections on the air passage, so as to implement the isolation and elimination of the turbine fan body 12.

[0029] An installation cavity 10 is provided in the middle of the inner side of the bottom shell 1, and a turbine fan body 12 which is also located in the bottom shell 1 is installed inside the installation cavity 10. A guide vane 11 is fixedly installed in the middle of the bottom of the bottom shell 1, and the guide vane 11 is located directly below the turbine fan body 12. The turbine fan body 12 is suspended and installed inside the installation cavity 10, and the lower end of the turbine fan body 12 is at a certain distance from the guide vane 11, so that the bottom of the turbine fan body 12 and the bottom wall of the bottom shell 1 form a space, and the air The air can enter the turbine fan body 12 after being rectified by the guide vane 11. An air inlet 5 is provided through the middle of the side wall of the bottom shell 1, and the bottom shell 1, the middle shell 2 and the top cover 3 are connected. A prefabricated through groove 7 is provided through the inner bottom of the bottom shell 1, and a connecting through pipe 8 is provided at the inner right end of the bottom shell 1. The air is rectified and constrained by the air inlet 5, passes through the middle shell 2 upward and enters the area surrounded by the middle shell 2 and the top cover 3, and moves forward in a clockwise direction through the annular channel provided inside the top cover 3, and passes through the air resistance 9;

[0030] The air resistance 9 is snap-fitted to the inside of the top cover 3, and the first isolation chamber 13 is opened on the left side of the inside of the bottom shell 1. The first isolation chamber 13 is connected to the prefabricated through groove 7, which makes installation more convenient. After flowing through the air resistance 9, the air enters the first isolation chamber 13 under the channel turning at the left position, and the air flows through the prefabricated through groove 7 to enter the bottom of the turbine fan body 12. An air outlet 6 is opened in the middle of the side wall of the top cover 3, and the air outlet 6 is connected to the connecting pipe 8. After the air passes through the turbine fan body 12 and does work, it flows to the connecting pipe 8 and the air outlet 6 in turn, and leaves the noise reduction box through the air outlet 6 to complete the noise reduction work. Through the multi-layer air path structure and the design of the bottom shell 1, the middle shell 2 and the top cover 3, the dust accumulation and bacteria breeding risks caused by the use of silencer cotton are avoided while the noise of the turbine fan body 12 is reduced. At the same time, the installation steps of the sound-absorbing cotton are reduced, and the assembly difficulty and cost are reduced.

Claims

1. The cotton-free multi-layer fan noise reduction box is characterized by: include: The middle shell (2) is adapted to be connected to the outer side of the upper end of the bottom shell (1), and the outer side of the upper end of the middle shell (2) is adapted to be connected to a top cover (3), and an air inlet (5) is provided through the middle of the side wall of the bottom shell (1); A prefabricated through groove (7) is formed through the inner bottom of the top cover (3), and a connecting through pipe (8) is provided at the inner right end of the bottom shell (1); An air block (9) is snap-fitted and arranged inside the top cover (3); a mounting cavity (10) is provided in the middle of the inner side of the bottom shell (1); and a turbine fan body (12) which is also located inside the bottom shell (1) is installed inside the mounting cavity (10); The first isolation chamber (13) is opened on the left side of the interior of the bottom shell (1), and the interiors of the middle shell (2) and the top cover (3) are connected to each other and a second isolation chamber (14) is provided.

2. The cotton-free multi-layer fan noise reduction box according to claim 1 is characterized in that: Sealing components (4) are provided inside the connection points between the bottom shell (1) and the middle shell (2) as well as between the middle shell (2) and the top cover (3), and the bottom shell (1), the middle shell (2) and the top cover (3) are connected.

3. The cotton-free multi-layer fan noise reduction box according to claim 1, characterized in that: A guide vane (11) is integrally fixedly mounted in the middle of the bottom of the bottom shell (1), and the guide vane (11) is located directly below the turbine fan body (12).

4. The cotton-free multi-layer fan noise reduction box according to claim 1, characterized in that: The first isolation cavity (13) is connected to the prefabricated through groove (7).

5. The cotton-free multi-layer fan noise reduction box according to claim 1, characterized in that: An air outlet (6) is provided through the middle of the side wall of the top cover (3), and the air outlet (6) is communicated with the connecting pipe (8).

6. The cotton-free multi-layer fan noise reduction box according to claim 1, characterized in that: The second isolation chamber (14) is provided with three sections respectively inside the middle shell (2) and the top cover (3), and an annular channel structure is provided inside the top cover (3).

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