Indoor air duct silencing device

Abstract

The utility model discloses an indoor air duct silencing device, which belongs to the technical field of indoor air duct silencing, and comprises a ventilation air duct, the inner wall of the ventilation air duct is in sliding connection with two mounting rings, one side surfaces, close to each other, of the two mounting rings are jointly and fixedly connected with a fixed cylinder, the inner wall of one mounting ring is fixedly connected with a cross-shaped limiting cylinder, and the inner wall of the other mounting ring is fixedly connected with a fixed cylinder. Four limiting columns are slidably connected to the inner wall of the cross-shaped limiting cylinder, and springs are fixedly connected to the ends, close to each other, of the limiting columns in each set. According to the indoor air duct silencing device, when a limiting column moves, a limiting block can be pulled to move, meanwhile, when the limiting column moves towards the interior of a cross-shaped limiting barrel, a spring can be extruded, the spring can contract inwards under the extrusion effect, and when a mounting ring and the limiting block are pushed to the mounting position, the limiting column can pull the limiting block to move; and the limiting block can be reset and fixed under the action of the spring, so that a worker can conveniently disassemble and assemble the silencing assembly subsequently.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of indoor air duct noise reduction, and particularly relates to an indoor air duct noise reduction device. BACKGROUND

[0002] Indoor air duct noise reduction refers to taking a series of measures to reduce the noise generated by air flow in the air duct in the ventilation and air conditioning system of a building to improve the acoustic quality of the indoor environment. These measures usually include installing a noise reducer in the air duct system, optimizing the air duct design, and using sound-absorbing materials to reduce the generation and propagation of noise.

[0003] The utility model with the authorized publication number CN221811375U discloses an indoor air duct noise reduction device, which comprises a main body cover and a ventilation channel. A noise reduction cavity is formed between the main body cover and the ventilation channel. A microporous plate is fixed to the inner wall of the ventilation channel. The outer layer of the microporous plate is a first noise reduction layer. A second noise reduction layer is arranged between the first noise reduction layer and the inner wall of the main body cover. Transition channels are arranged at both ends of the main body cover. Flanges are arranged at both ends of the transition channels. A central noise reduction component is fixed to the ventilation channel.

[0004] The above technical solution realizes the function of air duct noise reduction through the structure of the central noise reduction component, the first noise reduction layer, and the second noise reduction layer. The central noise reduction component is composed of several sound-absorbing single pieces. The sound-absorbing single piece comprises glass fiber and sound-absorbing cotton. The glass fiber wraps the sound-absorbing cotton. The sound-absorbing single piece is formed by a steel plate or an aluminum plate with a porous shell layer. However, in the use process of the device, it is inconvenient for the staff to disassemble and assemble the sound-absorbing components inside the ventilation duct. When the sound-absorbing components inside the ventilation duct are abnormal or damaged, it may be difficult to disassemble and assemble them, which may result in poor practicality.

[0005] Therefore, we propose an indoor air duct noise reduction device to solve the above problems. CONTENT OF THE UTILITY MODEL

[0006] The purpose of the present application is to solve the problem of difficulty in disassembly and assembly when the sound-absorbing components inside the ventilation duct are abnormal in the prior art. Therefore, an indoor air duct noise reduction device is proposed.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides an indoor air duct silencing device, including ventilation air duct, the inner wall of ventilation air duct is slidably connected with two installation rings, the side face of two installation rings is close to each other and is fixedly connected with fixed cylinder in common, the inner wall of one installation ring is fixedly connected with cross limiting cylinder, the inner wall of cross limiting cylinder is slidably connected with four limit posts, and the end of each group limit post is close to each other and is fixedly connected with spring, and the end of each group spring is close to each other and is fixedly connected with the inner wall of cross limiting cylinder, the outer surface of each limit post is fixedly connected with pull block, the outer surface of each pull block is slidably connected with the inner wall of cross limiting cylinder, and the end of each group limit post is away from each other and is fixedly connected with limiting block, the outer surface of each limiting block is slidably connected with the inner wall of installation ring, and the outer surface of each limiting block is slidably connected with the inner wall of ventilation air duct.

[0009] Preferably, the outer surface of the ventilation air duct is fixedly connected with two fixed blocks, and the inner wall of each fixed block is threadedly connected with two bolts.

[0010] Preferably, the side face of each of the two installation rings away from each other is fixedly connected with a flange, and the inner wall of each flange is threadedly connected with six threaded wires.

[0011] Preferably, the outer surface of the fixed cylinder is fixedly connected with a sound insulation cylinder, and the outer surface of the sound insulation cylinder is slidably connected with the inner wall of the ventilation air duct.

[0012] Preferably, the inner wall of the fixed cylinder is fixedly connected with a sound absorbing cylinder, and the outer surface of the sound absorbing cylinder is provided with sound absorbing holes arranged at equal distances.

[0013] Preferably, the inner wall of the sound absorbing cylinder is fixedly connected with first sound absorbing cotton, and the two side faces of the first sound absorbing cotton are in contact with the inner wall of the fixed cylinder.

[0014] Preferably, the outer surface of the sound absorbing cylinder is fixedly connected with second sound absorbing cotton, and the two side faces of the second sound absorbing cotton are in contact with the inner wall of the fixed cylinder.

[0015] To sum up, the technical effects and advantages of the utility model are as follows:

[0016] 1. By setting the installation ring, cross limiting cylinder, limit post, spring, limiting block and pull block, under the action of the pull block, when the staff pulls the pull block, the pull block can be pulled and moved, the limit post can be moved in the process of the pull block moving, the limiting block can be moved when the limit post moves, and the spring can be extruded when the limit post moves to the inside of the cross limiting cylinder, the spring can be shrunk to the inside under the action of extrusion, until the installation ring and the limiting block are pushed to the installation position, the limiting block can be reset and fixed under the action of the spring, so that the staff can conveniently disassemble and assemble the sound absorbing assembly subsequently. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the sectional view three-dimensional structure schematic diagram of the fixed cylinder of the utility model;

[0018] Figure 2 It is the sectional view three-dimensional structure schematic diagram of the fixed cylinder of the utility model;

[0019] Figure 3 It is the sectional view three-dimensional structure schematic diagram of the fixed cylinder of the utility model;

[0020] Figure 4 It is the sectional view three-dimensional structure schematic diagram of the fixed cylinder of the utility model;

[0021] In the drawing: 1, ventilation air duct; 2, fixed block; 3, bolt; 4, flange; 5, thread; 6, fixed cylinder; 7, mounting ring; 8, sound insulation cylinder; 9, cross limiting cylinder; 10, sound attenuation cylinder; 11, sound attenuation hole; 12, first sound absorbing cotton; 13, second sound absorbing cotton; 14, limiting column; 15, spring; 16, limiting block; 17, pull block. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Referring to Figures 1-4 A kind of indoor air duct sound attenuation device, including ventilation air duct 1, the inner wall of ventilation air duct 1 is slidably connected with two mounting rings 7, the side surface of two mounting rings 7 close to each other is fixedly connected with fixed cylinder 6, the outer surface of ventilation air duct 1 is fixedly connected with two fixed blocks 2, and the inner wall of each fixed block 2 is threadedly connected with two bolts 3, by being provided with fixed block 2 and bolt 3, device can be fixed firmly as a whole, so that it can stably work use.

[0024] The inner wall of one of mounting rings 7 is fixedly connected with cross limiting cylinder 9, the inner wall of cross limiting cylinder 9 is slidably connected with four limiting columns 14, the side surface of two mounting rings 7 away from each other is fixedly connected with flange 4, and the inner wall of each flange 4 is threadedly connected with six thread 5, by being provided with flange 4 and thread 5, it can be conveniently connected with other pipeline outside, to further improve the convenience when device is used.

[0025] Each set of limiting posts 14 is fixedly connected to a spring 15 at one end close to each other. The ends of each set of springs 15 are fixedly connected to the inner wall of the cross limiting cylinder 9. A sound insulation cylinder 8 is fixedly connected to the outer surface of the fixed cylinder 6. The outer surface of the sound insulation cylinder 8 is slidably connected to the inner wall of the ventilation duct 1. By setting the sound insulation cylinder 8, a certain sound insulation effect can be achieved, preventing sound from being directly diffused to the outside through the device.

[0026] Each limiting post 14 has a pull block 17 fixedly connected to its outer surface. The outer surface of each pull block 17 is slidably connected to the inner wall of the cross limiting cylinder 9. The inner wall of the fixed cylinder 6 is fixedly connected to a silencer 10. The outer surface of the silencer 10 has silencer holes 11 arranged at equal intervals. By setting the silencer 10 and the silencer holes 11, the degree of sound reflection can be increased, thereby reducing the intensity of the sound.

[0027] Each set of limiting posts 14 is fixedly connected to a limiting block 16 at one end that is far apart from each other. The outer surface of each limiting block 16 is slidably connected to the inner wall of the mounting ring 7. The inner wall of the silencer 10 is fixedly connected to a first sound-absorbing cotton 12. Both sides of the first sound-absorbing cotton 12 are in contact with the inner wall of the fixed cylinder 6. By setting the first sound-absorbing cotton 12, a portion of the sound can be absorbed when the sound is generated, thereby enabling the first step of sound processing.

[0028] The outer surface of each limiting block 16 is slidably connected to the inner wall of the ventilation duct 1. The outer surface of the silencer 10 is fixedly connected with a second sound-absorbing cotton 13. Both sides of the second sound-absorbing cotton 13 are in contact with the inner wall of the fixed cylinder 6. By setting the second sound-absorbing cotton 13, it is possible to further absorb the sound after the intensity of the sound is attenuated, and thus further process the sound.

[0029] The working principle of this utility model is as follows: In use, the operator first transports the device to a suitable location, then fixes it in place using bolts 3. Next, the silencer assembly is placed in the ventilation duct 1. Then, the operator presses the four pull blocks 17. Pulling the pull blocks 17 causes them to move, which in turn moves the limiting post 14. Simultaneously, the moving limiting post 14 pulls the limiting block 16. Furthermore, as the limiting post 14 moves into the cross-shaped limiting cylinder 9, it compresses the spring 15. Under this compression, the spring 15... The sound-absorbing component is then inserted into the ventilation duct 1 by the operator until the mounting ring 7 and the limiting block 16 are pushed to the installation position. Then, the pull block 17 is released, and the limiting block 16 can be reset and fixed under the action of the spring 15, thus fixing the sound-absorbing component inside the device. Conversely, it is also convenient to disassemble in case of abnormal use, effectively avoiding the problem of difficulty in disassembly and installation during use. At the same time, the first sound-absorbing cotton 12, the second sound-absorbing cotton 13, the sound-absorbing cylinder 10, and the sound insulation cylinder 8 can effectively absorb and block sound. Finally, it is connected to other pipes through the flange 4 for convenient use by the operator.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for sound attenuation in a room air duct, comprising a ventilation air duct (1), characterized in that: The inner wall of the ventilation duct (1) is slidably connected with two mounting rings (7), the side surfaces of the two mounting rings (7) close to each other are fixedly connected with a fixed cylinder (6), the inner wall of one of the mounting rings (7) is fixedly connected with a cross limiting cylinder (9), the inner wall of the cross limiting cylinder (9) is slidably connected with four limiting columns (14), the ends of each group of limiting columns (14) close to each other are fixedly connected with springs (15), the ends of each group of springs (15) close to each other are fixedly connected with the inner wall of the cross limiting cylinder (9), the outer surfaces of each limiting column (14) are fixedly connected with pull blocks (17), the outer surfaces of each pull block (17) are slidably connected with the inner wall of the cross limiting cylinder (9), the ends of each group of limiting columns (14) away from each other are fixedly connected with limiting blocks (16), the outer surfaces of each limiting block (16) are slidably connected with the inner wall of the mounting ring (7), and the outer surfaces of each limiting block (16) are slidably connected with the inner wall of the ventilation duct (1).

2. A duct silencer according to claim 1, wherein: The outer surface of the ventilation duct (1) is fixedly connected with two fixed blocks (2), and the inner wall of each fixed block (2) is threadedly connected with two bolts (3).

3. A device for reducing noise in an air duct in a room according to claim 1, characterized in that: The side surfaces of the two mounting rings (7) away from each other are fixedly connected with flanges (4), and the inner wall of each flange (4) is threadedly connected with six threaded wires (5).

4. A device for reducing noise in an air duct in a room according to claim 1, characterized in that: The outer surface of the fixed cylinder (6) is fixedly connected with a sound insulation cylinder (8), and the outer surface of the sound insulation cylinder (8) is slidably connected with the inner wall of the ventilation duct (1).

5. A device for reducing noise in an air duct in a room as defined in claim 1, wherein: The inner wall of the fixed cylinder (6) is fixedly connected with a sound elimination cylinder (10), and the outer surface of the sound elimination cylinder (10) is provided with sound elimination holes (11) arranged at equal distances.

6. A device for reducing noise in an air duct in a room according to claim 5, characterized in that The inner wall of the sound elimination cylinder (10) is fixedly connected with first sound absorption cotton (12), and the two side surfaces of the first sound absorption cotton (12) are in contact with the inner wall of the fixed cylinder (6).

7. A device for reducing noise in an air duct in a room according to claim 5, characterized in that: The outer surface of the sound elimination cylinder (10) is fixedly connected with second sound absorption cotton (13), and the two side surfaces of the second sound absorption cotton (13) are in contact with the inner wall of the fixed cylinder (6).

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