A central air conditioning pipeline noise reduction assembly

Abstract

The utility model discloses a central air conditioning pipeline noise reduction assembly, including central air conditioning ventilation pipeline, the inside of central air conditioning ventilation pipeline is provided with central air conditioning ventilation pipeline, the inside of central air conditioning ventilation pipeline is provided with noise reduction assembly no.

Description

Technical Field

[0001] This utility model relates to the field of central air conditioning duct technology, and in particular to a noise reduction component for central air conditioning ducts. Background Technology

[0002] In modern buildings, central air conditioning systems are crucial for regulating indoor temperature and air quality, and their operational efficiency and comfort directly impact people's living and working environments. However, during operation, especially when airflow is moving at high speeds within the ducts, central air conditioning systems often generate significant noise. This not only affects the quietness of the indoor environment but may also adversely affect people's physical and mental health. Therefore, effectively reducing the noise generated by central air conditioning ducts has become an important research and development topic in the field of air conditioning technology.

[0003] Currently, while some noise reduction technologies for central air conditioning ducts exist in the market, most only focus on the selection of duct materials or simple sound insulation treatments, failing to fundamentally solve the noise problem generated when airflow passes through the ducts. For example, although patent CN101225911A involves a central air conditioning duct, its technical solution does not fully consider how to efficiently ventilate and reduce noise in the central air conditioning duct, resulting in limited noise reduction effects in practical applications and failing to meet the demands of modern buildings for a quiet environment. Utility Model Content

[0004] The purpose of this invention is to provide a noise reduction component for central air conditioning ducts. A spiral guide vane is installed on the inner wall of the central air conditioning ventilation duct to guide the airflow in a spiral flow, reducing collision and eddy noise, while an outer wall sound insulation layer isolates noise transmission. Simultaneously, the annular air guide shell on the inner wall of the duct and its inner wall buffer noise reduction component, through the synergistic effect of trapezoidal guide blocks, buffer pads, and buffer noise reduction springs, buffer the airflow and absorb noise. Furthermore, the conical noise reduction holes opened on the noise reduction blocks installed on the inner wall of the duct optimize the airflow speed by varying the hole diameter, reducing friction and eddy noise between the airflow and the inner wall of the duct. Therefore, the overall noise reduction performance of the central air conditioning duct is significantly improved, providing a more comfortable and quiet indoor environment.

[0005] To achieve the above objectives, the main technical solutions adopted by this utility model include: A noise reduction component for central air conditioning ducts, comprising: A central air conditioning ventilation duct, wherein a central air conditioning ventilation duct is provided inside the central air conditioning ventilation duct, a noise reduction component one is provided inside the central air conditioning ventilation duct and located below the noise reduction component one, and a noise reduction component three is provided inside the central air conditioning ventilation duct and located below the noise reduction component two.

[0006] The aforementioned noise reduction component for central air conditioning ducts includes a spiral guide vane disposed on the inner wall of the central air conditioning ventilation duct, and a sound insulation layer sleeved on the outer wall of the central air conditioning ventilation duct.

[0007] The aforementioned noise reduction component for central air conditioning ducts, wherein the sound insulation layer is made of polyurethane sound insulation cotton.

[0008] The aforementioned central air conditioning duct noise reduction assembly includes, wherein the second noise reduction assembly comprises an annular air guide shell fixedly connected to the inner wall of the central air conditioning ventilation duct, and a plurality of buffer noise reduction components are arranged at equal intervals on the inner wall of the annular air guide shell.

[0009] The aforementioned central air conditioning duct noise reduction component includes a trapezoidal guide block slidably disposed on the inner wall of the annular air guide shell, wherein a buffer pad is disposed on the inclined surface of the trapezoidal guide block.

[0010] In the aforementioned central air conditioning duct noise reduction component, the top and bottom of the trapezoidal air guide block are fixedly connected to positioning sliders, and the inner wall of the annular air guide shell is provided with a positioning groove that matches the positioning slider at the position of the positioning slider.

[0011] In the aforementioned central air conditioning duct noise reduction component, two symmetrically arranged buffer noise reduction springs are fixedly connected to the side of the trapezoidal air guide block, and the other end of the buffer noise reduction spring is fixedly connected to the inner wall of the annular air guide shell.

[0012] The aforementioned central air conditioning duct noise reduction component includes a noise reduction block fixedly connected to the inner wall of the central air conditioning ventilation duct. The noise reduction block has a plurality of noise reduction holes arranged at equal intervals, and the noise reduction holes are designed to be tapered with a smaller top and a larger bottom.

[0013] This utility model has at least the following beneficial effects: 1. This utility model realizes a noise reduction component for central air conditioning ducts. A spiral guide vane is set on the inner wall of the central air conditioning ventilation duct to guide the airflow in a spiral flow to reduce collision and eddy noise, which is combined with the sound insulation layer on the outer wall to isolate noise transmission. At the same time, the annular air guide shell on the inner wall of the duct and the buffer noise reduction component on the inner wall buffer the airflow and absorb noise through the synergistic effect of the trapezoidal guide block, the buffer pad, and the buffer noise reduction spring. In addition, the conical noise reduction holes opened on the noise reduction block installed on the inner wall of the duct optimize the airflow speed by changing the hole diameter, reduce the friction between the airflow and the inner wall of the duct and the eddy noise, thereby significantly improving the overall noise reduction performance of the central air conditioning duct and providing a more comfortable and quiet guarantee for the indoor environment.

[0014] 2. Synergistic noise reduction through spiral guide vanes and sound insulation layer: By installing spiral guide vanes on the inner wall of the central air conditioning ventilation duct, the airflow can be guided to flow in a spiral shape, reducing direct collisions between the airflow and the inner wall of the duct and the generation of eddies, thereby reducing noise. At the same time, in conjunction with the sound insulation layer on the outer wall of the duct, the transmission of noise from inside the duct to the external environment can be effectively isolated, achieving a dual noise reduction effect.

[0015] 3. Buffer and noise reduction components further absorb noise: An annular air guide shell is installed on the inner wall of the central air conditioning ventilation duct, and multiple buffer and noise reduction components are installed on its inner wall. When airflow blows against the inclined surface of the trapezoidal guide block, the trapezoidal guide block is compressed, and under the combined action of the buffer pad and the buffer noise reduction spring, the airflow is buffered and noise is reduced. This design can further absorb and dissipate the noise energy in the airflow, improving the noise reduction effect.

[0016] 4. Noise Reduction Blocks and Holes Optimize Airflow Velocity: Noise reduction blocks are installed on the inner wall of the central air conditioning ventilation duct, with several tapered noise reduction holes (smaller at the top and larger at the bottom) drilled into them. When airflow passes through these holes, the change in hole diameter significantly reduces the airflow velocity, thereby reducing friction and turbulence between the airflow and the duct's inner wall, further lowering noise. This design not only optimizes airflow velocity but also improves noise reduction efficiency. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the noise reduction component for central air conditioning ducts of this utility model; Figure 2 This is a cross-sectional structural diagram of the noise reduction component for central air conditioning ducts of this utility model. Figure 3 This is a schematic diagram of the structure of noise reduction component two in the central air conditioning duct noise reduction assembly of this utility model; Figure 4 This is a cross-sectional structural diagram of the second noise reduction component in the central air conditioning duct noise reduction assembly of this utility model. Figure 5 This is a schematic diagram of the structure of noise reduction component three in the central air conditioning duct noise reduction assembly of this utility model; Figure 6 This is a cross-sectional structural diagram of noise reduction component three in the central air conditioning duct noise reduction assembly of this utility model.

[0018] Explanation of icon numbers: 1. Central air conditioning ventilation ducts; 2. Noise reduction component one; 3. Noise reduction component two; 4. Noise reduction component three; 201. Spiral airflow guide vane; 2011. Sound insulation layer; 301. Annular air guide shell; 302. Buffer and noise reduction assembly; 3021, Trapezoidal guide block; 3022, Buffer pad; 3023, Positioning slider; 3024, Positioning groove; 3025, buffer noise reduction spring; 401, noise reduction block; 402, noise reduction hole. Detailed Implementation

[0019] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0020] Please refer to Figures 1 to 6 As shown, an embodiment of the present invention provides a noise reduction component for a central air conditioning duct, comprising: a central air conditioning ventilation duct 1, a noise reduction component 1 2 disposed inside the central air conditioning ventilation duct 1, a noise reduction component 2 3 disposed inside the central air conditioning ventilation duct 1 and below the noise reduction component 1 2, and a noise reduction component 3 4 disposed inside the central air conditioning ventilation duct 1 and below the noise reduction component 2 3. By adopting the above technical solution, a spiral guide vane 201 is installed on the inner wall of the central air conditioning ventilation duct 1 to guide the airflow in a spiral flow to reduce collision and eddy noise, which, together with the outer wall sound insulation layer 2011, isolates noise transmission. At the same time, the annular air guide shell 301 on the inner wall of the central air conditioning ventilation duct 1 and the buffer noise reduction component 302 on its inner wall buffer the airflow and absorb noise through the synergistic effect of the trapezoidal guide block 3021, the buffer pad 3022, and the buffer noise reduction spring 3025. In addition, the conical noise reduction hole 402 opened on the noise reduction block 401 installed on the inner wall of the central air conditioning ventilation duct 1 optimizes the airflow speed by changing the hole diameter, reduces the friction and eddy noise between the airflow and the inner wall of the duct, thereby significantly improving the overall noise reduction performance of the central air conditioning duct and providing a more comfortable and quiet guarantee for the indoor environment.

[0021] In order to achieve spiral guidance and initial noise reduction of the internal airflow of the central air conditioning ventilation duct 1, in this embodiment: the noise reduction component 2 includes a spiral guide vane 201 disposed on the inner wall of the central air conditioning ventilation duct 1, and a sound insulation layer 2011 is sleeved on the outer wall of the central air conditioning ventilation duct 1. The spiral guide vane 201 can guide the airflow along the spiral path, reduce the direct collision between the airflow and the inner wall of the duct and the generation of eddies, and reduce the flow noise; in conjunction with the outer wall sound insulation layer 2011, it can further isolate the internal noise of the duct from the outside, forming a dual protection of airflow guidance and sound insulation and noise reduction.

[0022] In order to improve the noise reduction performance and durability of the sound insulation layer 2011, in this embodiment, the sound insulation layer 2011 is made of polyurethane sound insulation cotton. Polyurethane sound insulation cotton has excellent sound absorption and sound insulation performance, which can efficiently absorb and block airflow noise. At the same time, its aging resistance and corrosion resistance can extend the service life of the sound insulation layer 2011 and ensure stable long-term noise reduction effect.

[0023] In this embodiment, to buffer and reduce airflow noise and eddy noise, the noise reduction component 2 3 includes an annular air guide shell 301 fixedly connected to the inner wall of the central air conditioning ventilation duct 1. A plurality of buffer noise reduction components 302 are arranged at equal intervals on the inner wall of the annular air guide shell 301. The buffer noise reduction component 302 includes a trapezoidal flow guide block 3021 slidably disposed on the inner wall of the annular air guide shell 301. A buffer pad 3022 is disposed on the inclined surface of the trapezoidal flow guide block 3021. The trapezoidal flow guide block 3021 and the buffer pad 3022 can form a flexible buffer for the airflow. By changing the airflow direction and velocity distribution, the airflow is prevented from directly impacting the inner wall of the duct, reducing the generation of eddy noise. At the same time, the buffer pad 3022 can absorb some noise energy, further reducing airflow noise.

[0024] To ensure the stable sliding and precise buffering of the trapezoidal guide block 3021, in this embodiment: positioning sliders 3023 are fixedly connected to the top and bottom of the trapezoidal guide block 3021. A positioning groove 3024 matching the positioning slider 3023 is provided on the inner wall of the annular air guide shell 301 at the position corresponding to the positioning slider 3023. The matching design of the positioning slider 3023 and the positioning groove 3024 ensures that the trapezoidal guide block 3021 slides stably along a predetermined path under the action of airflow, avoiding its deviation or shaking, and ensuring the precise buffering and noise reduction effect of the buffer and noise reduction component 302.

[0025] To enhance the buffering performance and noise reduction efficiency of the trapezoidal guide block 3021, in this embodiment: two symmetrically arranged buffer noise reduction springs 3025 are fixedly connected to the side of the trapezoidal guide block 3021, and the other end of the buffer noise reduction spring 3025 is fixedly connected to the inner wall of the annular air guide shell 301. The buffer noise reduction spring 3025 can provide additional elastic buffering force. When the trapezoidal guide block 3021 is squeezed by airflow, the deformation of the spring absorbs and disperses the airflow energy, further reducing the noise generated by the airflow impact, while enhancing the durability and stability of the buffer noise reduction component 302.

[0026] To optimize airflow speed and reduce high-frequency noise, in this embodiment: the noise reduction component 3 4 includes a noise reduction block 401 fixedly connected to the inner wall of the central air conditioning ventilation duct 1. The noise reduction block 401 has a plurality of noise reduction holes 402 arranged at equal intervals, and the noise reduction holes 402 are tapered with a smaller upper diameter and a larger lower diameter. The tapered noise reduction holes 402, through the design of a smaller upper diameter and a larger lower diameter, make the airflow speed up and the pressure increase when passing through the small hole, and the flow speed decreases sharply and the pressure is released after entering the large hole. This process can effectively reduce the high-frequency noise of the airflow. At the same time, the tapered structure can reflect and absorb some noise energy, thereby improving the overall noise reduction effect.

[0027] The working principle of this invention is as follows: After the airflow enters the central air conditioning ventilation duct 1, it is first guided by the spiral guide vane 201 to flow in a spiral shape, reducing direct collision with the inner wall and the generation of eddies. At the same time, the outer wall sound insulation layer 2011 blocks the transmission of internal noise. Subsequently, the airflow enters the annular air guide shell 301 and impacts the inclined surface of the trapezoidal guide block 3021. Under the elastic buffering of the buffer pad 3022 and the buffer noise reduction spring 3025, the airflow energy is absorbed and dispersed, avoiding impact noise. Finally, the airflow flows through the conical noise reduction hole 402 of the noise reduction block 401. The flow velocity distribution is optimized by changing the hole diameter, reducing high-frequency noise, and the remaining noise is absorbed by reflecting the conical structure. Each component works in sequence to achieve full-band noise reduction from multiple dimensions such as airflow guidance, buffer noise reduction, and flow velocity optimization, significantly improving the acoustic performance of the central air conditioning duct and providing a lasting and stable quiet environment for the indoor environment.

[0028] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A noise reduction component for central air conditioning ducts, comprising central air conditioning ventilation ducts (1), characterized in that, The central air conditioning ventilation duct (1) is provided with a noise reduction component one (2), the central air conditioning ventilation duct (1) is provided with a noise reduction component two (3) located inside the central air conditioning ventilation duct (1) and below the noise reduction component one (2), and the central air conditioning ventilation duct (1) is provided with a noise reduction component three (4) located inside the central air conditioning ventilation duct (1) and below the noise reduction component two (3).

2. The noise reduction component for central air conditioning ducts according to claim 1, characterized in that: The noise reduction component (2) includes a spiral guide vane (201) disposed on the inner wall of the central air conditioning ventilation duct (1), and a sound insulation layer (2011) is sleeved on the outer wall of the central air conditioning ventilation duct (1).

3. A noise reduction component for central air conditioning ducts according to claim 2, characterized in that: The sound insulation layer (2011) is made of polyurethane sound insulation cotton.

4. A noise reduction component for central air conditioning ducts according to claim 3, characterized in that: The noise reduction component 2 (3) includes an annular air guide shell (301) fixedly connected to the inner wall of the central air conditioning ventilation duct (1), and a plurality of buffer noise reduction components (302) are arranged at equal intervals on the inner wall of the annular air guide shell (301).

5. A noise reduction component for central air conditioning ducts according to claim 4, characterized in that: The buffer noise reduction component (302) includes a trapezoidal guide block (3021) slidably disposed on the inner wall of the annular air guide shell (301), and a buffer pad (3022) is disposed on the inclined surface of the trapezoidal guide block (3021).

6. A noise reduction component for central air conditioning ducts according to claim 5, characterized in that: The top and bottom of the trapezoidal guide block (3021) are fixedly connected with positioning sliders (3023), and the inner wall of the annular air guide shell (301) is provided with a positioning groove (3024) that matches the positioning slider (3023).

7. A noise reduction component for central air conditioning ducts according to claim 6, characterized in that: The trapezoidal guide block (3021) is also fixedly connected to two symmetrically arranged buffer noise reduction springs (3025), and the other end of the buffer noise reduction spring (3025) is fixedly connected to the inner wall of the annular air guide shell (301).

8. A noise reduction component for central air conditioning ducts according to claim 7, characterized in that: The noise reduction component three (4) includes a noise reduction block (401) fixedly connected to the inner wall of the central air conditioning ventilation duct (1). The noise reduction block (401) has a plurality of noise reduction holes (402) arranged at equal intervals, and the noise reduction holes (402) are tapered designs with smaller tops and larger bottoms.

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