Negative pressure noise reduction exhaust structure

Abstract

The utility model provides a negative pressure noise reduction and air exhaust structure, and relates to the technical field of noise reduction and air exhaust. A negative pressure noise reduction exhaust structure comprises an axial flow fan, and the axial flow fan is arranged in an exhaust channel. The negative pressure noise reduction exhaust structure further comprises a wind shield, the wind shield is arranged on the air inlet side of the exhaust channel, the wind shield is of an arc-shaped shell structure, the arc-shaped shell structure is coaxially arranged at the fixed end of the axial flow fan, and an air inlet area is formed between the wind shield and the air inlet side of the exhaust channel. The negative pressure noise reduction exhaust structure has the advantage of being simple in structure, can effectively insulate sound on the indoor side, and does not affect the air inlet and outlet effect.

Description

Technical Field

[0001] The utility model relates to the technical field of silencing and exhausting air, and in particular to a negative pressure silencing and exhausting air structure. Background Art

[0002] When the axial flow fan is working, the blades push the air to flow in the same direction as the axis, so it is called an axial flow fan. Axial flow fans are divided into large axial flow fans, medium axial flow fans, and small axial flow fans. The appropriate axial flow fan is selected according to the required place of use. Generally speaking, large axial flow fans are mainly suitable for exhaust in places such as dust and gravel fields; medium axial flow fans are mainly suitable for indoor ventilation and heat dissipation. When the axial flow fan is used, when its air inlet side is indoors, it is easy to cause noise pollution to the room. Using sound insulation materials to block the axial flow fan will affect the air inlet and outlet effects. Therefore, there is a need for a negative pressure silencer exhaust structure with a simple structure that can effectively soundproof the indoor side and does not affect the air inlet and outlet effects. Utility Model Content

[0003] The utility model aims to provide a negative pressure sound-absorbing and exhausting structure, which has a simple structure and can effectively soundproof the indoor side without affecting the air inlet and outlet effects.

[0004] The embodiment of the utility model is achieved as follows:

[0005] The embodiment of the present application provides a negative pressure silencing exhaust structure, comprising an axial flow fan, which is arranged in an exhaust passage. The negative pressure silencing exhaust structure also comprises a wind shield, which is arranged on the air inlet side of the exhaust passage, and is an arc-shaped shell structure, which is coaxially arranged on the fixed end of the axial flow fan, and an air inlet area is formed between the wind shield and the air inlet side of the exhaust passage.

[0006] In some embodiments of the utility model, a fixed fence is arranged in the exhaust passage, the axial flow fan is arranged on the fixed fence, and the wind shield is arranged on the fixed fence.

[0007] In some embodiments of the present invention, the wind shield is an umbrella-shaped structure.

[0008] In some embodiments of the present invention, the wind shield is connected to the fixed fence via a connecting column.

[0009] In some embodiments of the present invention, the minimum distance between the wind shield and the air inlet side of the wind channel is 20 to 50 cm.

[0010] In some embodiments of the present invention, the windshield is a soundproof board.

[0011] In some embodiments of the present invention, the sound insulation board comprises a sound insulation felt layer, a board layer and a sound absorbing cotton layer which are stacked in sequence.

[0012] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0013] The utility model provides a negative pressure sound-absorbing exhaust structure, comprising an axial flow fan, which is arranged in an exhaust passage. The negative pressure sound-absorbing exhaust structure also includes a windshield, which is arranged on the air inlet side of the exhaust passage, and is an arc-shaped shell structure, which is coaxially arranged at the fixed end of the axial flow fan, and an air inlet area is formed between the windshield and the air inlet side of the exhaust passage. The axial flow fan uses blades to push air to flow in the same direction as the axis to form a negative pressure environment on the air inlet side, thereby driving the airflow into the exhaust passage for discharge. The windshield is arranged on the air inlet side, and after being coaxial with the axial flow fan, the windshield is arranged in an arc-shaped structure, and the airflow entering the exhaust passage will enter the air inlet area along the four sides of the windshield, and will not affect the air inlet and outlet effect of the exhaust passage. At the same time, the windshield of the arc-shaped shell structure will effectively play a sound insulation effect, so that the noise generated by the axial flow fan and the airflow is reflected and absorbed by the windshield of the arc-shaped shell structure, which can play a great sound-absorbing effect.

[0014] Therefore, the negative pressure silencer exhaust structure has a simple structure, can effectively soundproof the indoor side, and does not affect the air inlet and outlet effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0017] Figure 2 A three-dimensional cross-sectional view of an embodiment of the utility model;

[0018] Figure 3 It is a schematic structural diagram of a windshield in an embodiment of the utility model.

[0019] Icons: 1-wind shield; 101-sound insulation felt layer; 102-board layer; 103-sound-absorbing cotton layer; 2-axial flow fan; 3-exhaust duct; 4-air inlet area; 5-fixed fence; 6-connecting column. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0022] Example

[0023] Please refer to Figure 1-Figure 3 , Figure 1 Shown is a schematic structural diagram of an embodiment of the utility model; Figure 2 A three-dimensional cross-sectional view of an embodiment of the utility model; Figure 3 It is a structural schematic diagram of the windshield in the embodiment of the utility model. This embodiment provides a negative pressure silencing exhaust structure, including an axial flow fan 2, and the above-mentioned axial flow fan 2 is arranged in the exhaust channel 3. The negative pressure silencing exhaust structure also includes a windshield 1, which is arranged on the air inlet side of the exhaust channel 3. The above-mentioned windshield 1 is an arc-shaped shell structure, and the above-mentioned arc-shaped shell structure is coaxially arranged at the fixed end of the above-mentioned axial flow fan 2, and an air inlet area 4 is formed between the above-mentioned windshield 1 and the air inlet side of the above-mentioned exhaust channel 3. The axial flow fan 2 uses blades to push the air to flow in the same direction as the axis to form a negative pressure environment on the air inlet side, so as to drive the air flow into the exhaust channel for discharge. The above-mentioned windshield 1 is arranged on the air inlet side, and after being coaxial with the axial flow fan 2, the windshield 1 is set to an arc structure, and the airflow entering the exhaust channel will enter the air inlet area 4 along the four sides of the windshield 1, and will not affect the air inlet and outlet effects of the exhaust channel 3. At the same time, the windshield 1 of the arc-shaped shell structure can effectively achieve a sound insulation effect, so that the noise generated by the axial flow fan and the airflow is reflected and absorbed by the windshield 1 of the arc-shaped shell structure, which can achieve a great sound-absorbing effect.

[0024] Therefore, the negative pressure silencer exhaust structure has a simple structure, can effectively soundproof the indoor side, and does not affect the air inlet and outlet effects.

[0025] In some implementations of the present embodiment, a fixed fence 5 is disposed in the exhaust passage 3 , the axial flow fan 2 is disposed on the fixed fence 5 , and the wind shield 1 is disposed on the fixed fence 5 .

[0026] In this embodiment, the fixed fence 5 is mainly used to fix the axial flow fan 2 and the wind shield 1, and at the same time facilitate the passage of airflow.

[0027] In some implementations of this embodiment, the wind shield 1 is an umbrella-shaped structure. In this embodiment, the wind shield 1 adopts an umbrella-shaped structure to expand the air inlet area 4 on the air inlet side of the axial direction of the axial fan 2, ensuring that the airflow enters and exits the exhaust channel 3 normally, and at the same time, the area of ​​the wind shield 1 can be increased, thereby increasing the sound insulation and sound absorption effect. In addition, the use of an umbrella-shaped structure can also make the noise reflect regularly to the same point, which can further restrain the noise.

[0028] In some implementations of this embodiment, the wind shield 1 and the fixed fence 5 are connected via a connecting column 6 .

[0029] In the present embodiment, the connecting column 6 can connect the wind shield 1 and the fixed fence 5 , and sufficient space can be reserved between the wind shield 1 and the fixed fence 5 .

[0030] In some implementations of this embodiment, the minimum spacing between the wind shield 1 and the air inlet side of the wind channel is 20 to 50 cm. In this embodiment, the minimum spacing between the wind shield 1 and the air inlet side of the wind channel is 20 to 50 cm, which can effectively allow the airflow to enter the air inlet area 4 under a negative pressure environment, and at the same time, can effectively eliminate the indoor noise.

[0031] In some implementations of this embodiment, the wind shield 1 is a soundproof board. The wind shield 1 is a soundproof board, which can further improve the sound insulation and sound absorption effects.

[0032] In some implementations of this embodiment, the sound insulation board includes a sound insulation felt layer 101, a board layer 102, and a sound absorbing cotton layer 103 which are stacked in sequence. The sound insulation felt layer 101 can initially absorb noise, while part of the noise will be reflected by the board layer 102 and processed in the form of echo. Part of the noise will be further absorbed by the sound absorbing cotton layer 103, thus achieving a better sound insulation effect.

[0033] When in use, the windshield 1 is arranged at the air inlet side and is coaxial with the axial flow fan 2, and the windshield 1 is arranged in an arc structure, and the airflow entering the discharge channel will enter the air inlet area 4 along the periphery of the windshield 1, and will not affect the air inlet and outlet effects of the exhaust channel 3. At the same time, the windshield 1 with the arc shell structure can effectively achieve a sound insulation effect, so that the noise generated by the axial flow fan and the airflow is reflected and absorbed by the windshield 1 with the arc shell structure, which can achieve a great sound-absorbing effect.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A negative pressure silencing exhaust structure, comprising an axial flow fan, wherein the axial flow fan is arranged in an exhaust passage, characterized in that: It includes a wind shield, which is arranged on the air inlet side of the exhaust channel. The wind shield is an arc-shaped shell structure, and the arc-shaped shell structure is coaxially arranged on the fixed end of the axial flow fan. An air inlet area is formed between the wind shield and the air inlet side of the exhaust channel.

2. The negative pressure silencing exhaust structure according to claim 1 is characterized in that: A fixed fence is arranged in the exhaust passage, the axial flow fan is arranged on the fixed fence, and the wind shield is arranged on the fixed fence.

3. The negative pressure silencing exhaust structure according to claim 2 is characterized in that: The wind shield is an umbrella-shaped structure.

4. The negative pressure silencing exhaust structure according to claim 3 is characterized in that: The wind shield is connected to the fixed fence via a connecting column.

5. The negative pressure silencing exhaust structure according to claim 3 is characterized in that: The minimum distance between the wind shield and the air inlet side of the wind channel is 20 to 50 cm.

6. The negative pressure silencing exhaust structure according to any one of claims 1 to 5, characterized in that: The wind shield is a sound insulation board.

7. The negative pressure silencing exhaust structure according to claim 6, characterized in that: The sound insulation board comprises a sound insulation felt layer, a board body layer and a sound absorbing cotton layer which are stacked in sequence.

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