High-efficiency and mute air blower air inlet structure
Patent Information
- Application Number
- CN202522505913.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-26
AI Technical Summary
In the existing technology, the noise generated by the blower during operation is directly transmitted through the air inlet of the casing, lacking the extension of the transmission path and the soundproofing treatment, resulting in poor noise reduction effect.
Design a high-efficiency and quiet blower air intake structure, including setting an installation cavity and air intake corridor in the casing, laying sound-absorbing cotton layers in various parts, and performing multi-stage sound absorption treatment through U-shaped airflow channels and sound-absorbing frames to extend the noise propagation path and reduce sound wave energy.
It significantly reduces the noise intensity in the mid-to-low frequency range and greatly weakens noise radiation through multi-stage silencing treatment, achieving a highly efficient noise reduction effect.
Smart Images
Figure CN224931941U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blower air intake, and in particular to a high-efficiency and quiet blower air intake structure. Background Technology
[0002] A blower is a device that converts mechanical energy into gas energy. It achieves the intake, compression, and transportation of gas by rotating blades or changing the gas volume. It is widely used in industries such as industry, environmental protection, and energy.
[0003] Blowers generate noise during operation. Current technology involves installing the blower inside a casing and using sound-absorbing materials on the casing walls for noise reduction. While this method reduces noise to some extent, the blower needs to draw in outside air, requiring an air inlet on the casing. The noise from the blower propagates directly outwards through the internal space of the casing from the air inlet. This outward noise propagation lacks a design to extend the propagation path and lacks sound-absorbing measures along that path, resulting in poor noise reduction effectiveness. Utility Model Content
[0004] This invention provides a high-efficiency and quiet blower air intake structure to solve the technical problem of poor noise reduction effect.
[0005] This utility model solves the above-mentioned technical problems through the following technical solutions: This utility model provides a high-efficiency and quiet blower air intake structure, including a casing with air inlets on both sides; it also includes: a mounting cavity in which a blower is installed; the mounting cavity is located in the middle of the casing, and the inner wall of the mounting cavity is uniformly and without dead corners covered with a first layer of sound-absorbing cotton; an air intake corridor located inside the bottom side of the mounting cavity, with both ends of the air intake corridor extending from both sides of the mounting cavity; a connecting groove is provided on the portion of the air intake corridor located inside the mounting cavity; the inner wall of the air intake corridor is uniformly and without dead corners. A second sound-absorbing cotton layer is laid; the two ends of the air intake corridor extending outside the mounting cavity are respectively connected to a first airflow channel and a second airflow channel, and the side of the first airflow channel and the second airflow channel away from the air intake corridor is connected to the air inlet; the first airflow channel and the second airflow channel are both inverted U-shaped, and the top bends of the first airflow channel and the second airflow channel are respectively provided with a third sound-absorbing cotton layer and a fourth sound-absorbing cotton layer; the inner walls of the first airflow channel and the second airflow channel are both covered with a fifth sound-absorbing cotton layer; a sound-absorbing frame is set inside the air inlet.
[0006] Preferably, a first partition and a second partition are fixedly installed inside the chassis, and the side walls of the first partition, the side walls of the second partition, and the front, rear, upper, and lower inner side walls of the chassis form the mounting cavity.
[0007] Preferably, the base of the blower is fixedly installed above the portion of the air intake corridor located inside the mounting cavity; the air outlet of the blower extends from the top of the casing to the outside of the top of the casing.
[0008] Preferably, the first airflow channel includes a vertically arranged air intake hood and a frequency converter cover fixedly installed to one side of the air intake hood; the bottom of the air intake hood is connected to one end of the air intake corridor, and a connecting cover is fixedly installed on the top of the air intake hood and the top of the frequency converter cover, and the top of the air intake hood and the top of the frequency converter cover are connected through the connecting cover.
[0009] Preferably, the third sound-absorbing cotton layer is installed on the top inner wall of the connecting cover.
[0010] Preferably, the second airflow channel includes a third partition disposed on one side of the second partition; a carrier plate is disposed on the top of the third partition, and both the third partition and the carrier plate are fixed inside the chassis. A first slot is disposed between the third partition and the second partition, a second slot is disposed between the top side of the third partition and the carrier plate, and a third slot is disposed between the side of the third partition away from the second partition and one inner wall of the chassis. The top of the first slot communicates with the top of the third slot through the second slot.
[0011] Preferably, the fourth sound-absorbing cotton layer is installed on the bottom of the carrier plate.
[0012] Preferably, the sound-absorbing frame includes a frame body fixedly installed inside the chassis, and multiple sound-absorbing cotton sleeves are evenly spaced inside the frame body, with each pair of adjacent sound-absorbing cotton sleeves forming a strip-shaped groove.
[0013] Preferably, an inner rod is fixed to the middle of the sound-absorbing cotton sleeve, and the inner rod is fixedly installed inside the frame.
[0014] Preferably, the chassis has a door installed on the front.
[0015] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.
[0016] The positive and progressive effects of this utility model are as follows: The aforementioned efficient and quiet blower intake structure uses a mounting cavity and a first layer of sound-absorbing cotton evenly and seamlessly laid on the cavity wall to initially reduce the noise generated by the blower's operation. The intake corridor, first airflow channel, and second airflow channel, which are U-shaped, cause the noise's path towards the intake to bend and detour, extending the noise's propagation path within the casing. Simultaneously, the addition of a fifth and second layer of sound-absorbing cotton forces sound waves to propagate along the aforementioned complex path before reaching the intake. During propagation within these curved channels, sound waves undergo multiple reflections, interference, and path losses, resulting in an exponential decrease in sound energy with propagation distance. This effectively extends the distance sound waves travel from the source to the outside, significantly weakens the intensity of mid-to-low frequency noise, and substantially reduces direct noise radiation. Furthermore, as noise propagates outward from the chassis, it undergoes multi-stage noise reduction treatment through the first, second, third, fourth, and fifth sound-absorbing cotton layers, as well as the sound-absorbing frame, ensuring the noise reduction effect. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0018] Figure 2 This is a cross-sectional structural diagram of the chassis of this utility model.
[0019] Figure 3 This is a schematic diagram of the overall front structure of this utility model.
[0020] Figure 4 This is a schematic diagram showing the airflow pattern inside the chassis during air intake.
[0021] Figure 5 This is a schematic diagram showing the outward diffusion of noise from inside the chassis according to this utility model.
[0022] Figure 6 This is a schematic diagram of the structure of the sound-absorbing frame of this utility model.
[0023] Figure 7 This is a schematic diagram of the structure of the fifth sound-absorbing cotton layer and the third partition of this utility model.
[0024] Explanation of reference numerals in the attached figures 1. Chassis; 101. Chassis door; 2. Air inlet; 3. First partition; 4. Second partition; 5. First sound-absorbing cotton layer; 6. Air intake corridor; 601. Connecting slot; 602. Second sound-absorbing cotton layer; 7. Air intake cover; 8. Blower; 9. Air outlet; 10. Inverter cover; 11. Third partition; 12. Third sound-absorbing cotton layer; 13. Fourth sound-absorbing cotton layer; 14. Sound-absorbing frame; 1401. Frame body; 1402. Inner rod; 1403. Sound-absorbing cotton sleeve; 15. Fifth sound-absorbing cotton layer; 16. Connecting cover. Detailed Implementation
[0025] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.
[0026] like Figures 1-7 As shown, a high-efficiency and quiet blower air intake structure includes a housing 1, with air inlets 2 on both sides of the housing 1; it also includes: The mounting cavity is equipped with a blower 8; the mounting cavity is located in the middle of the housing 1, and the inner wall of the mounting cavity is uniformly covered with a first sound-absorbing cotton layer 5 without dead corners; An air intake channel 6 is provided inside the bottom side of the mounting cavity, and both ends of the air intake channel 6 extend from both sides of the mounting cavity respectively; a connecting groove 601 is provided on the part of the air intake channel 6 located inside the mounting cavity; a second sound-absorbing cotton layer 602 is evenly laid on the inner wall of the air intake channel 6 without dead corners. The two ends of the air intake corridor 6 extending outside the mounting cavity are respectively connected to the first airflow channel and the second airflow channel, and the side of the first airflow channel and the second airflow channel away from the air intake corridor 6 is connected to the air inlet 2. Both the first airflow channel and the second airflow channel are inverted U-shaped, and the top bends of the first airflow channel and the second airflow channel are respectively provided with a third sound-absorbing cotton layer 12 and a fourth sound-absorbing cotton layer 13; the inner walls of the first airflow channel and the second airflow channel are both covered with a fifth sound-absorbing cotton layer 15. The muffler frame 14 is located inside the air inlet.
[0027] When blower 8 is working, such as Figure 4 As shown in the figure, the arrows indicate the direction of airflow. Outside air enters through the air inlets on both sides, then enters the two ends of the air intake corridor 6 through the first airflow channel and the second airflow channel, and then enters the installation cavity through the connecting groove 601 on the air intake corridor 6 to provide air intake for the blower 8.
[0028] During the operation of the aforementioned blower 8, the aerodynamic and mechanical noise generated propagates as follows: Figure 5 As shown in the diagram, the arrows indicate the direction of noise propagation. The generated noise is first silenced by the first sound-absorbing cotton layer 5, then enters the air intake corridor 6 and is silenced by the second sound-absorbing cotton layer 602. Next, the noise enters the first and second airflow channels and is silenced by the fifth sound-absorbing cotton layer 15. The noise propagates along the first and second airflow channels, passes through the top bend, and is silenced by the third and fourth sound-absorbing cotton layers 12 and 13. Finally, it is silenced by the sound-absorbing frame 14 and then propagates to the outside from the air intake 2, greatly reducing the noise propagation to the outside and achieving a quieting effect.
[0029] The U-shaped structure of the first and second airflow channels makes the noise propagation path bend and detour, and extends the propagation path of the noise in the chassis 1. At the same time, a fifth sound-absorbing cotton layer 15 is set on the inner wall of the first and second airflow channels, and a second sound-absorbing cotton layer 602 is set on the inner wall of the air intake corridor 6, forcing the sound waves to propagate along the aforementioned pre-set complex path before reaching the air intake 2 (the noise cannot propagate outward through the walls of the first airflow channel, the second airflow channel, and the air intake corridor 6).
[0030] When sound waves propagate through a curved channel, they undergo multiple reflections, interferences, and path losses, causing their sound energy to decrease exponentially with the propagation distance. This effectively extends the distance sound waves travel from the sound source (the impeller at 8 locations on the blower or the intake turbulence) to the outside world, significantly reducing the intensity of mid-to-low frequency noise and substantially decreasing direct noise radiation.
[0031] Simultaneously, the noise reduction process involves multiple levels and multiple noise reduction treatments through the first noise reduction cotton layer 5, the second noise reduction cotton layer 602, the third noise reduction cotton layer 12, the fourth noise reduction cotton layer 13, the fifth noise reduction cotton layer 15, and the noise reduction frame 14, ensuring the noise reduction effect.
[0032] To further ensure that noise only propagates outward from the air inlet 2, sound-absorbing and sound-insulating materials are also evenly laid on the wall of the chassis 1 without any dead corners.
[0033] like Figures 4-5 As shown, a first partition 3 and a second partition 4 are fixedly installed inside the chassis 1. The side walls of the first partition 3, the side walls of the second partition 4, and the front, rear, upper, and lower inner side walls of the chassis 1 form the mounting cavity. The mounting cavity provides installation space for the blower 8.
[0034] The base of the blower 8 is fixedly installed above the part of the air intake corridor 6 located inside the mounting cavity; the air outlet 9 of the blower 8 extends from the top of the casing 1 to the outside of the top of the casing 1.
[0035] like Figure 1 , Figure 4 as well as Figure 5 As shown, the first airflow channel includes a vertically arranged air intake hood 7 and a frequency converter cover 10 fixedly installed on one side of the air intake hood 7; the bottom of the air intake hood 7 is connected to one end of the air intake corridor 6, and a connecting cover 16 is fixedly installed on the top of the air intake hood 7 and the top of the frequency converter cover 10, and the top of the air intake hood 7 and the top of the frequency converter cover 10 are connected through the connecting cover 16.
[0036] The third sound-absorbing cotton layer 12 is installed on the top inner wall of the connecting cover 16.
[0037] Noise propagates through one end of the air intake duct 6 into the first airflow channel. It then propagates sequentially along the air intake shroud 7, the connecting shroud 16, and the inverter shroud 10, finally reaching the air inlet 2 from the bottom of the inverter shroud 10 and spreading outwards from the chassis 1. During this propagation process, the noise is absorbed by the fifth sound-absorbing cotton layer 15 and the third sound-absorbing cotton layer 12 on the inner wall of the first airflow channel. The difference between the third and fifth sound-absorbing cotton layers 12 is that the third layer 12 is thicker to enhance the sound absorption effect.
[0038] When the blower 8 is working, the airflow passes through the inverter cover 10, which can dissipate heat from the inverter inside.
[0039] like Figures 4-5 As shown, the second airflow channel includes a third partition 11 disposed on one side of the second partition 4; a carrier plate is disposed on the top of the third partition 11, and both the third partition 11 and the carrier plate are fixed inside the chassis 1. A first slot is disposed between the third partition 11 and the second partition 4, a second slot is disposed between the top side of the third partition 11 and the carrier plate, and a third slot is disposed between the side of the third partition 11 away from the second partition 4 and one side of the inner wall of the chassis 1. The top of the first slot is connected to the top of the third slot through the second slot.
[0040] The fourth sound-absorbing cotton layer 13 is installed on the bottom of the carrier plate.
[0041] The fifth sound-absorbing cotton layer 15, which is laid on the inner wall of the second airflow channel, is specifically laid on the side walls of the second partition 4 and the third partition 11.
[0042] Noise propagates through one end of the air intake duct 6 into the second airflow channel, then sequentially along the first, second, and third slots, finally reaching the air inlet 2 through the third slot and spreading outwards from the chassis 1. During this propagation process, the noise is absorbed by the fifth and fourth sound-absorbing cotton layers 15 and 13 on the inner wall of the first airflow channel. The fourth sound-absorbing cotton layer 13 is thickened to enhance the sound absorption effect.
[0043] like Figure 6 As shown, the noise-absorbing frame 14 includes a frame body 1401 fixedly installed inside the chassis 1. Multiple noise-absorbing cotton sleeves 1403 are evenly spaced within the frame body 1401, with each pair of adjacent cotton sleeves 1403 forming a strip-shaped groove. When noise passes through the noise-absorbing frame 14, it passes through the groove between the cotton sleeves 1403 and is thus absorbed by the cotton sleeves, improving the noise reduction effect.
[0044] An inner rod 1402 is fixed to the middle of the sound-absorbing cotton sleeve 1403, and the inner rod 1402 is fixedly installed inside the frame 1401. The inner rod 1402 serves as the skeleton of the sound-absorbing cotton sleeve 1403 and is used to support the sound-absorbing cotton sleeve 1403.
[0045] like Figure 3 As shown, a door 101 is installed on the front of the chassis 1. The door 101 allows the front of the chassis 1 to be opened, enabling maintenance of the internal components of the chassis 1.
[0046] The sound-absorbing and sound-insulating materials on the wall of the chassis 1, the sound-absorbing cotton cover 1403, the first sound-absorbing cotton layer 5, the second sound-absorbing cotton layer 602, the third sound-absorbing cotton layer 12, the fourth sound-absorbing cotton layer 13 and the fifth sound-absorbing cotton layer 15 are all made of polyester fiber-coated fireproof sound-absorbing cotton.
[0047] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.
Claims
1. A high-efficiency and quiet blower air intake structure, comprising a casing (1), wherein air inlets (2) are provided on both sides of the casing (1); characterized in that, Also includes: The mounting cavity is equipped with a blower (8); the mounting cavity is located in the middle of the machine box (1), and the inner wall of the mounting cavity is uniformly covered with a first sound-absorbing cotton layer (5) without dead corners. An air intake channel (6) is provided inside the bottom side of the mounting cavity, and the two ends of the air intake channel (6) extend from the two sides of the mounting cavity respectively; a connecting groove (601) is provided on the part of the air intake channel (6) located inside the mounting cavity; a second sound-absorbing cotton layer (602) is evenly laid on the inner wall of the air intake channel (6) without dead corners. The two ends of the air intake corridor (6) extending out of the mounting cavity are respectively connected to the first airflow channel and the second airflow channel, and the side of the first airflow channel and the second airflow channel away from the air intake corridor (6) is connected to the air inlet (2); The first airflow channel and the second airflow channel are both inverted U-shapes, and the top bends of the first airflow channel and the second airflow channel are respectively provided with a third sound-absorbing cotton layer (12) and a fourth sound-absorbing cotton layer (13); the inner walls of the first airflow channel and the second airflow channel are both covered with a fifth sound-absorbing cotton layer (15). A muffler frame (14) is provided on the inside of the air inlet.
2. The high-efficiency and quiet blower air intake structure as described in claim 1, characterized in that: The chassis (1) is fixedly installed with a first partition (3) and a second partition (4). The side wall of the first partition (3), the side wall of the second partition (4), and the front, rear, upper and lower inner side walls of the chassis (1) form the mounting cavity.
3. The high-efficiency and quiet blower air intake structure as described in claim 1, characterized in that: The base of the blower (8) is fixedly installed above the air intake corridor (6) located inside the installation cavity; the air outlet (9) of the blower (8) extends from the top of the casing (1) to the outside of the top of the casing (1).
4. The high-efficiency and quiet blower air intake structure as described in claim 1, characterized in that: The first airflow channel includes a vertically arranged air intake hood (7) and a frequency converter cover (10) fixedly installed on one side of the air intake hood (7); the bottom of the air intake hood (7) is connected to one end of the air intake corridor (6), and a connecting cover (16) is fixedly installed on the top of the air intake hood (7) and the top of the frequency converter cover (10), and the top of the air intake hood (7) and the top of the frequency converter cover (10) are connected through the connecting cover (16).
5. The high-efficiency and quiet blower air intake structure as described in claim 4, characterized in that: The third sound-absorbing cotton layer (12) is installed on the top inner wall of the connecting cover (16).
6. The high-efficiency and quiet blower air intake structure as described in claim 1, characterized in that: The second airflow channel includes a third partition (11) disposed on one side of the second partition (4); a carrier plate is disposed on the top of the third partition (11), and both the third partition (11) and the carrier plate are fixed inside the chassis (1). A first slot is disposed between the third partition (11) and the second partition (4), and a second slot is disposed between the top side of the third partition (11) and the carrier plate. A third slot is disposed between the side of the third partition (11) away from the second partition (4) and the inner wall of one side of the chassis (1). The top of the first slot is connected to the top of the third slot through the second slot.
7. The high-efficiency and quiet blower air intake structure as described in claim 6, characterized in that: The fourth sound-absorbing cotton layer (13) is installed on the bottom of the carrier plate.
8. The high-efficiency and quiet blower air intake structure as described in claim 1, characterized in that: The sound-absorbing frame (14) includes a frame (1401) fixedly installed inside the chassis (1). Multiple sound-absorbing cotton sleeves (1403) are evenly spaced inside the frame (1401), and each pair of adjacent sound-absorbing cotton sleeves (1403) forms a strip-shaped groove.
9. The high-efficiency and quiet blower air intake structure as described in claim 8, characterized in that: An inner rod (1402) is fixed in the middle of the sound-absorbing cotton sleeve (1403), and the inner rod (1402) is fixedly installed inside the frame (1401).
10. The high-efficiency and quiet blower air intake structure as described in claim 1, characterized in that: The front of the chassis (1) is equipped with a door (101).