Noise reduction ventilation pipe

Abstract

The utility model discloses a noise reduction vent pipe, relates to kitchenware application field, including vent pipe body and diversion fan cover, the interior of vent pipe body is equipped with two staggered flow slowing subassembly and one sound absorption subassembly, flow slowing subassembly includes the slow flow plate that is hinged to the inner wall of vent pipe body and the telescopic pole that is hinged to one side of slow flow plate, the sound absorption assembly comprises a ventilation baffle vertically installed in the ventilation pipe body, a plurality of ventilation openings are formed in the ventilation baffle, a plurality of sound absorption side plates are arranged on the two sides of the ventilation baffle in a protruding mode, a sound insulation cotton layer is embedded in the side wall of the ventilation pipe body, and the ventilation pipe body is wrapped with a buffering protection cover and strip-shaped buffering cotton. The air speed can be reduced through the flow slowing assembly, part of wind power is converted into kinetic energy of the flow slowing plate and elastic potential energy of the elastic connecting part, the noise reduction effect is improved, the noise absorption assembly can absorb airflow noise in all directions to achieve the noise reduction purpose, and the sound insulation effect is good.

Description

Technical Field

[0001] This utility model relates to the field of kitchenware applications, specifically a noise-reducing ventilation pipe. Background Technology

[0002] The applications of ventilation ducts mainly include central air conditioning systems in hotels, shopping malls, hospitals, factories, and office buildings; dust removal for industrial pollution control; exhaust ducts for kitchen and catering equipment; and supply and return air systems for environmental control in coal mines. During use, the airflow within the ventilation duct can easily generate whistling and airflow noise, causing noise pollution. For example, in kitchen and catering applications, range hoods need to be connected to fume ventilation ducts. The air moving within the duct impacts the inner wall of the duct, generating noise. This noise can affect the duct structure and reduce its lifespan.

[0003] To address the above issues, utility model patent CN214889687U discloses a noise reduction structure for ventilation ducts. This device, by incorporating an air inlet baffle and silencing holes, allows sound waves to undergo multiple refractions within the baffle. It utilizes the noise-absorbing capabilities of the wood fibers within the baffle's wooden structure to reduce noise. However, this device relies solely on the air inlet baffle for noise absorption, resulting in a limited effectiveness. Furthermore, after prolonged use, the silencing holes in the baffle are prone to clogging, affecting airflow. Utility Model Content

[0004] The purpose of this invention is to provide a noise-reducing ventilation duct to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A noise-reducing ventilation duct includes a ventilation duct body, an air guide hood fixedly installed at the air inlet end of the ventilation duct body, two staggered flow-slowing components arranged inside the ventilation duct body, the flow-slowing components being inclined relative to the inner wall of the ventilation duct body, and a sound-absorbing component arranged inside the ventilation duct body.

[0007] As a further embodiment of this utility model: the flow-regulating component includes a flow-regulating plate hinged to the inner wall of the ventilation duct, and two telescopic rods are movably installed on the plate body near the inner wall of the ventilation duct.

[0008] As a further improvement of this utility model: both ends of the telescopic rod are fixedly connected to limit rings, the two limit rings are respectively hinged to the side wall of the flow buffer and the inner wall of the ventilation pipe, and a telescopic spring is sleeved on the telescopic rod and the telescopic spring is located between the two limit rings.

[0009] As a further embodiment of this utility model: the sound-absorbing component includes three ventilation baffles vertically installed inside the ventilation duct body and the three ventilation baffles are arranged parallel to each other. Multiple ventilation openings are provided on the ventilation baffles, and the ventilation openings are evenly distributed in an array on the ventilation baffles. The ventilation openings on two adjacent ventilation baffles are staggered.

[0010] As a further improvement of this utility model: multiple sound-absorbing side plates are raised on both sides of the ventilation baffle. The sound-absorbing side plates are set on the edge of the ventilation opening without obstruction. The sound-absorbing side plates are set perpendicular to the ventilation baffle. The sound-absorbing side plates on two adjacent ventilation baffles are staggered without contacting each other, and each sound-absorbing side plate is parallel to each other.

[0011] As a further improvement of this utility model, a sound-insulating cotton layer is embedded inside the side wall of the ventilation duct.

[0012] As a further improvement of this utility model: the ventilation duct body is wrapped with a buffer cover, and the part of the buffer cover that contacts the side wall of the ventilation duct body is fixedly bonded with protruding strip-shaped buffer cotton.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. By setting up flow-damping components, when the airflow entering the ventilation duct passes through two staggered flow-damping components, the airflow path takes an S-shape, which reduces the wind speed and achieves the initial effect of reducing wind noise. Furthermore, since the free end of the flow-damping plate is elastically connected to the inner wall of the ventilation duct, some of the wind force will be converted into the kinetic energy of the flow-damping plate and the elastic potential energy of the elastic connecting parts, thereby further reducing the wind speed and improving the noise reduction effect.

[0015] 2. The ventilation baffles with interlaced vents can completely vertically cover the airflow channel inside the ventilation duct. The ventilation baffles block and guide the airflow, further slowing down the airflow speed. The sound-absorbing side panels and the vents work together to form a labyrinthine channel, so that the airflow noise is absorbed from all directions to achieve the purpose of noise reduction and good sound insulation effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model.

[0017] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the flow-slowing component in Embodiment 1 of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the sound-absorbing component in Embodiment 1 of this utility model.

[0020] Figure 5 This is a three-dimensional structural diagram of Embodiment 2 of the present invention.

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the ventilation duct in Embodiment 2 of this utility model.

[0022] In the diagram: 1. Ventilation duct; 2. Airflow guide hood; 3. Flow control assembly; 31. Flow control plate; 32. Telescopic rod; 33. Limiting ring; 34. Telescopic spring; 4. Sound absorption assembly; 41. Ventilation baffle; 42. Ventilation opening; 43. Sound absorption side panel; 5. Sound insulation cotton layer; 6. Buffer cover; 7. Strip buffer cotton. Detailed Implementation

[0023] The following embodiments will be described in detail with reference to the accompanying drawings. In the drawings and description, similar or identical parts are referred to by the same reference numerals. Furthermore, in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this utility model are merely illustrative and not intended to limit the scope of the utility model. Any obvious modifications or alterations made to this utility model do not depart from its spirit and scope.

[0024] Example 1

[0025] See also Figures 1-4 In this embodiment of the utility model, a noise reduction ventilation pipe includes a ventilation pipe body 1. A guide hood 2 is fixedly installed at the air inlet end of the ventilation pipe body 1. The guide hood 2 can centrally guide the oil fume air entering the ventilation pipe body 1.

[0026] Two staggered flow-regulating components 3 are hinged inside the ventilation duct 1. The flow-regulating components 3 are inclined relative to the inner wall of the ventilation duct 1. Each flow-regulating component 3 includes a flow-regulating plate 31 hinged to the inner wall of the ventilation duct 1. Two telescopic rods 32 are movably mounted on the side of the flow-regulating plate 31 closest to the inner wall of the ventilation duct 1. Specifically, each end of the telescopic rod 32 is fixedly connected to a limiting ring 33. The two limiting rings 33 at both ends of one telescopic rod 32 are hinged to the side wall of the flow-regulating plate 31 and the inner wall of the ventilation duct 1, respectively. Each telescopic rod 32 is fitted with a telescopic spring 34, which is positioned between the two limiting rings 33. The airflow entering the ventilation duct 1 through the guide hood 2 will flow through two staggered flow-damping components 3. At this time, the airflow path is S-shaped, which reduces the wind speed and achieves the effect of initially reducing wind noise. Furthermore, since the free end of the flow-damping plate 31 is elastically connected to the inner wall of the ventilation duct 1, some of the wind force will be converted into the kinetic energy of the flow-damping plate 31 and the elastic potential energy of the elastic connecting components, thereby further reducing the wind speed and improving the noise reduction effect.

[0027] The ventilation duct 1 is further equipped with a sound-absorbing component 4. The sound-absorbing component 4 includes three ventilation baffles 41 vertically installed inside the ventilation duct 1, and the three ventilation baffles 41 are arranged parallel to each other. The ventilation baffles 41 are provided with multiple ventilation openings 42, which are evenly distributed in an array on the ventilation baffles 41. The ventilation openings 42 on adjacent ventilation baffles 41 are staggered. Multiple sound-absorbing side plates 43 are raised on both sides of the ventilation baffles 41. The sound-absorbing side plates 43 are arranged on the edge of the ventilation openings 42 without obstruction. The sound-absorbing side plates 43 are arranged perpendicular to the ventilation baffles 41. The sound-absorbing side plates 43 on adjacent ventilation baffles 41 are staggered without contact, and each sound-absorbing side plate 43 is parallel to each other. The ventilation baffles 41, which are arranged in an interlaced manner with the ventilation openings 42, can completely vertically cover the airflow channel inside the ventilation duct 1. The ventilation baffles 41 block and guide the airflow, further slowing down the airflow speed. The sound-absorbing side plate 43 and the ventilation openings 42 work together to form a labyrinthine channel, so that the airflow noise is absorbed from all directions to achieve the purpose of noise reduction and good sound insulation effect.

[0028] Example 2

[0029] See also Figures 5-6 Based on Embodiment 1, the ventilation duct 1 has a sound insulation cotton layer 5 embedded inside the side wall, and a buffer cover 6 wrapped around the outside of the ventilation duct 1. The part of the buffer cover 6 that contacts the side wall of the ventilation duct 1 is fixedly bonded with protruding strip buffer cotton 7. The sound insulation cotton layer 5 and the strip buffer cotton 7 can buffer the vibration generated by the ventilation duct 1 under the impact of airflow, further reducing the noise of the ventilation duct 1.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the kitchenware application.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A noise-reducing ventilation duct, comprising a ventilation duct body (1), characterized in that, The ventilation duct (1) is fixedly installed with a flow guide hood (2) at the air inlet end. The ventilation duct (1) is provided with two staggered flow slowing components (3). The flow slowing components (3) are inclined relative to the inner wall of the ventilation duct (1). The ventilation duct (1) is provided with a sound absorption component (4).

2. The noise-reducing ventilation duct according to claim 1, characterized in that, The flow-slowing component (3) includes a flow-slowing plate (31) hinged to the inner wall of the ventilation duct (1), and two telescopic rods (32) are movably installed on the plate (31) on the side of the ventilation duct (1) near the inner wall.

3. The noise-reducing ventilation duct according to claim 2, characterized in that, Both ends of the telescopic rod (32) are fixedly connected to limit rings (33). The two limit rings (33) are respectively hinged to the side wall of the flow plate (31) and the inner wall of the ventilation pipe (1). The telescopic rod (32) is fitted with a telescopic spring (34) and the telescopic spring (34) is located between the two limit rings (33).

4. The noise-reducing ventilation duct according to claim 3, characterized in that, The sound-absorbing component (4) includes three ventilation baffles (41) vertically installed inside the ventilation duct (1) and the three ventilation baffles (41) are arranged parallel to each other. The ventilation baffles (41) are provided with multiple ventilation openings (42). The ventilation openings (42) are evenly distributed in an array on the ventilation baffles (41), and the ventilation openings (42) on two adjacent ventilation baffles (41) are staggered.

5. The noise-reducing ventilation duct according to claim 4, characterized in that, The ventilation baffle (41) has multiple sound-absorbing side plates (43) protruding on both sides. The sound-absorbing side plates (43) are set on the edge of the ventilation opening (42) without obstruction. The sound-absorbing side plates (43) are set perpendicular to the ventilation baffle (41). The sound-absorbing side plates (43) on two adjacent ventilation baffles (41) are staggered without contacting each other, and each sound-absorbing side plate (43) is parallel to each other.

6. The noise-reducing ventilation duct according to any one of claims 1-5, characterized in that, The ventilation duct (1) has a sound insulation cotton layer (5) embedded in the inner side wall.

7. The noise-reducing ventilation duct according to claim 6, characterized in that, The ventilation duct (1) is wrapped with a buffer cover (6), and the part of the buffer cover (6) that contacts the side wall of the ventilation duct (1) is fixedly bonded with protruding strip-shaped buffer cotton (7).

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