Noise reduction and muting structure in air duct

Abstract

The utility model relates to the technical field of air duct noise reduction, and discloses an air duct internal noise reduction mute structure, which comprises an air duct, an inner pipeline is fixedly connected in the air duct, a placing groove is arranged on the inner pipeline, a buffer sleeve is sleeved on the inner pipeline in the placing groove, a mute layer is laid on the inner wall of the inner pipeline, and the mute layer is arranged on the inner wall of the inner pipeline. An annular groove is formed in the inner pipeline, at least one fan-shaped baffle is hinged to the interior of the groove, a connecting rod is hinged to the fan-shaped baffle, one end of the connecting rod is located in the groove, at least one fixing block is fixedly connected to the interior of the groove, and the other end of the connecting rod is located in the fixing block. Compared with the prior art, the air duct noise reduction device has the advantages that noise reduction can be carried out on an air duct, meanwhile, dust can be prevented from entering the air duct, and the practicability of the air duct is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air duct noise reduction, and specifically refers to a noise reduction and silencing structure in an air duct. Background Art

[0002] The air duct is a pipe system used to transport air, used to transport the airflow generated by the fan from one location to another. It is usually made of metal or plastic, with a smooth inner wall and a fixed structure to ensure that the air can flow smoothly and reduce energy loss.

[0003] The main reason for noise in the duct is duct vibration. When the air flow speed in the duct system is high or the duct design is unreasonable, the duct will vibrate, which will cause noise. The air flow in the duct will rub against the duct wall, generating airflow noise. In particular, when the duct wall is rough or there are debris, it will cause increased noise. The duct structure in the prior art is simple, mainly used for transmitting air, with a single function. After long-term use, dust will accumulate in the duct wall, increasing noise and making it not very practical. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is that the air duct has a simple structure and a single function. After long-term use, dust will be present in the air duct wall, which increases the noise and has low practicality.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the technical solution provided by the utility model is: a noise reduction and silencing structure in an air duct, including an air duct, an inner pipe fixedly connected in the air duct, a placement groove is provided on the inner pipe, a buffer sleeve is sleeved in the placement groove on the inner pipe, a sound-proof layer is paved on the inner wall of the inner pipe, a ring-arranged groove is provided in the inner pipe, at least one fan-shaped baffle is hinged in the groove, a connecting rod is hinged on the fan-shaped baffle, one end of the connecting rod is located in the groove, at least one fixed block is fixedly connected in the groove, a spring located in the groove is fixedly connected between the fixed block and the connecting rod, a threaded groove is provided at one end of the air duct, a filter assembly is movably inserted in the threaded groove, and a threaded ring matching the threaded groove is threadedly connected at one end of the air duct.

[0008] As an improvement, the groove is provided with limiting plates arranged correspondingly on two sides.

[0009] As an improvement, a fan-shaped shield plate cooperating with the fan-shaped baffle plate is fixedly connected inside the inner pipe.

[0010] As an improvement, four sector-shaped baffles are arranged, and the sector-shaped baffles form a circle.

[0011] As an improvement, the filter assembly includes a fixing ring, a filter screen is fixedly connected inside the fixing ring, and the filter screen is fixedly connected to the fixing ring by bolts.

[0012] As an improvement, the inner side of the threaded ring is fixedly connected to a turning handle which is correspondingly arranged on both sides.

[0013] (III) Beneficial effects

[0014] The advantages of the utility model compared with the prior art are:

[0015] By putting a buffer sleeve on the inner pipe, the vibration of the air duct can be reduced, thereby reducing noise. By laying a silent layer on the inner wall of the inner pipe, the noise transmitted from the inner pipe can be reduced. Through the action of the fan-shaped baffle, connecting rod, fixing block and spring, the generated noise can be reflected and interfered, and at the same time, the contact area between the wind and the inner pipe can be reduced to a certain extent, thereby playing a role in noise reduction. The filter can prevent dust from entering the air duct, effectively reducing the generation of noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a three-dimensional diagram of a noise reduction and silencing structure in an air duct.

[0017] Figure 2 The utility model is an exploded diagram of a noise reduction and silencing structure in an air duct.

[0018] Figure 3 The utility model is a cross-sectional view of a noise reduction and silence structure in an air duct.

[0019] Figure 4 It is an enlarged view of point A of a noise reduction and silencing structure in an air duct of the utility model.

[0020] As shown in the figure: 1. Air duct; 2. Inner pipe; 3. Placement groove; 4. Buffer sleeve; 5. Groove; 6. Fan-shaped baffle; 7. Connecting rod; 8. Fixed block; 9. Spring; 10. Limit plate; 11. Fan-shaped baffle; 12. Threaded groove; 13. Filter assembly; 14. Threaded ring; 15. Fixed ring; 16. Filter net; 17. Turn handle. DETAILED DESCRIPTION

[0021] The technical solutions 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 only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] like Figure 1 , Figure 2 , Figure 4 As shown, a noise reduction and silencing structure in an air duct comprises an air duct 1, an inner pipe 2 is fixedly connected in the air duct 1, a placement groove 3 is provided on the inner pipe 2, a buffer sleeve 4 is sleeved in the placement groove 3 on the inner pipe 2, a sound-proof layer is laid on the inner wall of the inner pipe 2, a ring-shaped groove 5 is provided in the inner pipe 2, and a limiting plate 10 is arranged on both sides of the groove 5, at least one fan-shaped baffle 6 is hinged in the groove 5, a fan-shaped shielding plate 11 cooperating with the fan-shaped baffle 6 is fixedly connected in the inner pipe 2, and the fan-shaped baffle 6 Four of them are arranged, and the fan-shaped baffles 6 form a circle. A connecting rod 7 is hinged on the fan-shaped baffle 6, and one end of the connecting rod 7 is located in the groove 5. At least one fixed block 8 is fixedly connected in the groove 5, and a spring 9 located in the groove 5 is fixedly connected between the fixed block 8 and the connecting rod 7. The vibration of the air duct 1 can be reduced by the buffer sleeve 4, and the noise can be blocked by the silent layer. Through the action of the fan-shaped baffle 6, the connecting rod 7, the fixed block 8 and the spring 9, the contact area between the wind and the inner pipe 2 can be reduced, thereby achieving a noise reduction effect.

[0023] like Figure 2 , Figure 3 As shown, one end of the air duct 1 is provided with a threaded groove 12, and a filter assembly 13 is movably inserted in the threaded groove 12. One end of the air duct 1 is threadedly connected with a threaded ring 14 that cooperates with the threaded groove 12, and the inner side of the threaded ring 14 is fixedly connected with a turning handle 17 arranged correspondingly on both sides. The filter assembly 13 includes a fixing ring 15, and a filter screen 16 is fixedly connected to the fixing ring 15. The filter screen 16 is fixedly connected to the fixing ring 15 by bolts, and dust in the wind is intercepted by the filter screen 16. The filter assembly 13 is fixed in the air duct 1 by the threaded ring 14.

[0024] In specific use, wind enters the air duct 1. With the cooperation of the buffer sleeve 4, when the wind is strong, the buffer sleeve 4 can play a shock-absorbing role, thereby playing a role in noise reduction. By arranging a silent layer in the inner pipe 2, the noise is retained in a part of the inner pipe 2, thereby playing a role in noise reduction. By arranging four fan-shaped baffles 6, the wind can pass through the holes of the fan-shaped baffles 6, effectively reducing the contact area between the wind and the inner pipe 2, thereby reducing the friction between the wind and the inner wall of the inner pipe 2. When the wind is strong, the wind blows the fan-shaped baffle 6 to rotate, thereby causing the connecting rod 7 to push the spring 9 to move, and the spring 9 is deformed. At this time, the angle of the fan-shaped baffle 6 changes, thereby reflecting the noise and reducing the noise. When the wind is small, the spring 9 generates elastic force to push the connecting rod 7 to move, thereby pushing the fan-shaped baffle 6 back to its initial position.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0027] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A noise reduction and silencing structure in an air duct, comprising an air duct (1), characterized in that: An inner pipe (2) is fixedly connected to the air duct (1), a placement groove (3) is provided on the inner pipe (2), a buffer sleeve (4) is sleeved in the placement groove (3) on the inner pipe (2), and a sound-proof layer is laid on the inner wall of the inner pipe (2); The inner pipe (2) is provided with an annular groove (5), the groove (5) is hinged with at least one fan-shaped baffle (6), the fan-shaped baffle (6) is hinged with a connecting rod (7), one end of the connecting rod (7) is located in the groove (5), the groove (5) is fixedly connected with at least one fixed block (8), and a spring (9) located in the groove (5) is fixedly connected between the fixed block (8) and the connecting rod (7); One end of the air duct (1) is provided with a thread groove (12), a filter assembly (13) is movably inserted in the thread groove (12), and one end of the air duct (1) is threadedly connected with a thread ring (14) that cooperates with the thread groove (12).

2. The noise reduction and silencing structure in the air duct according to claim 1, characterized in that: The groove (5) is provided with limiting plates (10) arranged correspondingly on both sides.

3. The noise reduction and silencing structure in an air duct according to claim 1, characterized in that: A fan-shaped shielding plate (11) matched with the fan-shaped baffle plate (6) is fixedly connected inside the inner pipe (2).

4. The noise reduction and silencing structure in an air duct according to claim 1, characterized in that: Four sector-shaped baffles (6) are arranged, and the sector-shaped baffles (6) form a circle.

5. The noise reduction and silencing structure in an air duct according to claim 1, characterized in that: The filter assembly (13) comprises a fixing ring (15), a filter screen (16) is fixedly connected inside the fixing ring (15), and the filter screen (16) is fixedly connected to the fixing ring (15) by bolts.

6. The noise reduction and silencing structure in an air duct according to claim 1, characterized in that: The inner side of the threaded ring (14) is fixedly connected to a turning handle (17) correspondingly arranged on both sides.

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