Silent central air conditioning terminal air outlet sound attenuation guide structure

Abstract

The utility model discloses a kind of mute type central air conditioning terminal air outlet sound attenuation flow guide structure, including air guide duct, the bottom of air guide duct is communicated with shunt bin, the four corners of shunt bin are communicated with shunt duct, four the outside of shunt duct is equipped with the exhaust pipe of intercommunication, the top of shunt bin is equipped with servo motor, the output of servo motor is equipped with threaded rod, the outside of air guide duct is equipped with annular plate;The utility model is communicated with shunt duct by being set around shunt bin, for shunting the airflow guided by air guide duct, avoid a large number of airflow to gather each other and discharge from same air duct, leading to the noise generated by airflow is difficult to decompose and dissipate, and utilize the structure cooperation of conical flow guide seat and baulk and baffle, promote the airflow shunting guided by air guide duct, simultaneously, evenly contact the noise reduction plate set in the four corners of shunt bin, thereby to the airflow and noise of shunting carry out preliminary decomposition noise reduction.

Description

Technical Field

[0001] This utility model relates to the technical field of central air conditioning ventilation systems, specifically to a silent central air conditioning terminal air outlet noise reduction and airflow guiding structure. Background Technology

[0002] When central air conditioning is working, it is common to install silencers and sound insulation devices at the air outlets. These devices are mainly silencers or silencer elbows installed at the air duct openings and inside the ventilation ducts, such as impedance composite silencers and plate silencers. Through sound-absorbing materials and special structures, they absorb and reflect airflow noise, reducing noise transmission.

[0003] Authorized publication number CN214949750U discloses a duct silencer and a central air conditioning ventilation system. This device primarily absorbs noise passing through the silencing cavity by installing sound-absorbing plates and perforated plates on the cavity walls. Furthermore, it divides the silencing cavity into a first and second silencing cavity by installing partitions axially within the cavity and setting first and second perforated plates on opposite sides of the partitions. The first and second perforated plates further absorb refracted noise. Therefore, this duct silencer achieves good noise reduction while ensuring sufficient airflow. However, in actual use, the following drawbacks still exist:

[0004] The aforementioned patents primarily reduce noise in air conditioning ventilation systems by absorbing refracted noise. However, in central air conditioning systems, airflow is typically discharged directly from the terminal vents. When a large volume of airflow is discharged through a small vent, the resulting noise is difficult to distribute evenly. Furthermore, the vents are usually not adjustable, making it difficult to change the path and range of the airflow. This increases the tightness of the exhaust airflow, making it difficult for the sound-absorbing material to fully absorb and reflect the airflow noise, thus increasing the noise propagation rate. Utility Model Content

[0005] The purpose of this utility model is to provide a silent central air conditioning terminal air outlet noise reduction and airflow guiding structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a silent central air conditioning terminal air outlet noise reduction and airflow guiding structure, including an air guide duct, a flow distribution chamber connected to the bottom of the air guide duct, flow distribution pipes connected to the four corners of the flow distribution chamber, an exhaust pipe connected to the outside of the four flow distribution pipes, a servo motor provided at the top of the flow distribution chamber, a threaded rod provided at the output end of the servo motor, an annular plate provided on the outside of the air guide duct, a lifting block and four sets of hinge blocks respectively provided on the outside of the annular plate, and a movable plate hinged to the exhaust pipe at the bottom of the hinge block;

[0007] The bottom of the diversion chamber is provided with a conical guide seat, and a baffle and a baffle are respectively installed on the outer side of the conical guide seat. Noise reduction plates are provided at the four corners of the diversion chamber, and each set of noise reduction plates extends to the inner side of the diversion pipe. Sliding grooves are provided on both sides of the diversion pipe.

[0008] Preferably, the exhaust pipe includes an arc-shaped section, and there are four sets of arc-shaped sections. The four arc-shaped sections are located at the end of the exhaust pipe. The inner wall of the four arc-shaped sections is provided with an arc-shaped sound-absorbing plate. The bottom of the interior of the four arc-shaped sections is provided with a jet silencing channel. The inner side of the four arc-shaped sections is symmetrically provided with sliders, and the sliders are adapted to the grooves.

[0009] Preferably, the servo motor is provided with a protective shell on its outer side, and the lifting block is threadedly matched with the threaded rod to increase the protection effect of the motor.

[0010] Preferably, there are four sets of noise reduction plates. The four noise reduction plates are set at the four corners inside the diversion chamber. The four noise reduction plates are opposite to the horizontal plane of the conical guide seat. By setting the four sets of noise reduction plates, not only can the airflow be silenced and noise reduced, but the airflow can also be guided into the diversion pipe to realize the exhaust work of the structure in silencing and reducing noise.

[0011] Preferably, the four blocks are connected by a flow guide groove, and the flow guide groove is positioned opposite to the noise reduction plate. By opening the flow guide groove, the airflow is directed downward from the flow guide groove and contacts the noise reduction plate to reduce noise.

[0012] Preferably, the end of the fourth diversion pipe is provided with a sealing ring, and the fourth exhaust pipe slides horizontally on the outside of the diversion pipe to increase the sealing of the diversion pipe and prevent air leakage when the exhaust pipe is extended or retracted.

[0013] Preferably, the fourth baffle is located at the bottom of the block and is positioned opposite to the diversion pipe, so that the airflow guided by the block can be blocked by the baffle and diffused to both sides, so that the airflow can finally contact the noise reduction plate for noise reduction.

[0014] Preferably, the bottom end of the fourth arc-shaped segment is an exhaust port, the fourth jet silencing channel is located inside the arc-shaped segment, and the fourth arc-shaped sound-absorbing plate extends to the inner side of the jet silencing channel to increase the noise reduction effect of the structure.

[0015] The present invention provides a noise reduction and airflow guiding structure for a silent central air conditioning terminal air outlet, which has at least the following beneficial effects:

[0016] 1. By setting interconnected diversion pipes around the diversion chamber, the airflow guided by the duct is diverted, avoiding the accumulation of large amounts of airflow and their discharge from the same duct, which would make it difficult to decompose and dissipate the noise generated by the airflow. The structure of the conical guide seat, baffle, and baffle plate is used to promote the diversion of the airflow guided by the duct and make it evenly contact the noise reduction plates set at the four corners of the diversion chamber. This initially decomposes and reduces the noise of the diverted airflow. When the airflow enters the diversion pipe, the structure of the exhaust pipe is used to absorb and reduce the noise of the passing airflow. The diverted airflow is then silenced by the arc-shaped guide section and the arc-shaped sound-absorbing plate and jet silencer channel, which effectively improves the sound absorption and noise reduction effect of the guide structure.

[0017] 2. The structure connects the exhaust duct and the distribution duct, allowing the airflow from the central air conditioning system to be introduced into the exhaust duct from the distribution duct for multi-stage noise reduction before being discharged. The lifting and lowering adjustment of the annular plate allows the annular plate to simultaneously drive four sets of movable plates to push the exhaust duct outward, thereby expanding the exhaust outlets of each set of exhaust ducts and facilitating changes in the position of the exhaust outlets, increasing the functionality and flexibility of the structure. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present utility model;

[0019] Figure 2 This is a first top sectional view of the diversion compartment of this utility model;

[0020] Figure 3 This is a second top sectional view of the diversion compartment of this utility model;

[0021] Figure 4 This is a cross-sectional view of the exhaust pipe of this utility model;

[0022] Figure 5 This is a perspective view of the conical flow guide seat of this utility model.

[0023] In the diagram: 1. Air duct; 2. Diversion chamber; 3. Diversion duct; 4. Exhaust duct; 41. Arc-shaped section; 42. Arc-shaped sound-absorbing panel; 43. Jet silencing channel; 44. Slider; 5. Servo motor; 6. Threaded rod; 7. Annular plate; 8. Lifting block; 9. Movable plate; 10. Noise reduction plate; 11. Conical guide seat; 12. Baffle; 13. Baffle; 14. Slide groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 The present invention provides an embodiment of a silent central air conditioning terminal air outlet noise reduction and airflow guiding structure, including an air guide duct 1, a flow distribution chamber 2 connected to the bottom of the air guide duct 1, flow distribution ducts 3 connected to the four corners of the flow distribution chamber 2, an exhaust pipe 4 connected to the outside of the four flow distribution ducts 3, a sealing ring at the end of the four flow distribution ducts 3, and the four exhaust pipes 4 sliding horizontally on the outside of the flow distribution ducts 3 to increase the sealing of the flow distribution ducts 3 and prevent airflow leakage when the exhaust pipes 4 are extended and retracted.

[0026] The top of the diversion chamber 2 is equipped with a servo motor 5, model HG-JR153B. The output end of the servo motor 5 is equipped with a threaded rod 6. The outer side of the air duct 1 is equipped with an annular plate 7. The outer side of the annular plate 7 is equipped with a lifting block 8 and four sets of hinge blocks. The bottom of the hinge block is equipped with a movable plate 9 that is hinged to the exhaust pipe 4. The outer side of the servo motor 5 is equipped with a protective shell. The lifting block 8 is threadedly matched with the threaded rod 6 to increase the protection effect of the motor.

[0027] There are four sets of noise reduction plates 10. The four noise reduction plates 10 are set at the four corners inside the diversion chamber 2. The four noise reduction plates 10 are opposite to the horizontal plane of the conical guide seat 11. By setting the four sets of noise reduction plates, not only can the airflow be silenced and noise reduced, but the airflow can also be guided into the diversion pipe 3 to realize the exhaust work of the noise reduction of this structure.

[0028] The bottom of the diversion chamber 2 is provided with a conical guide seat 11. A baffle 12 and a baffle 13 are respectively installed on the outside of the conical guide seat 11. Noise reduction plates 10 are provided at the four corners of the diversion chamber 2. Each set of noise reduction plates 10 extends to the inside of the diversion pipe 3. Slide grooves 14 are opened on both sides of the four diversion pipes 3.

[0029] The exhaust pipe 4 includes an arc-shaped section 41, which consists of four sets. The four arc-shaped sections 41 are located at the end of the exhaust pipe 4. The inner wall of the four arc-shaped sections 41 is provided with an arc-shaped sound-absorbing plate 42. The bottom of the interior of the four arc-shaped sections 41 is provided with a jet silencing channel 43. The inner side of the four arc-shaped sections 41 is symmetrically provided with sliders 44, and the sliders 44 are adapted to the slide groove 14.

[0030] Example 1, such as Figure 1-3As shown, there are flow guide channels between the four baffles 12, and the flow guide channels are opposite to the noise reduction plate 10. The four baffles 13 are set at the bottom of the baffles 12 and are opposite to the diversion pipe 3. Through the flow guide channels between each set of baffles 12, the airflow is guided to cover the surface of the noise reduction plate 10 so that the guided airflow can absorb sound and reduce noise. The baffles 13 are set at the end of the baffles 12 so that the airflow introduced from the baffles 12 can flow to both sides under the obstruction of the baffles 13, so that the airflow is forced to contact the surface of the noise reduction plate 10. This structure not only achieves the uniformity of the airflow diversion, but also allows the airflow to contact the noise reduction plate 10 evenly for noise reduction treatment.

[0031] Example 2, as Figure 1-5 As shown, the bottom end of the four arc-shaped section 41 is the exhaust port, and the four jet silencing channels 43 are set inside the arc-shaped section 41. The four arc-shaped sound-absorbing plates 42 extend to the inner side of the jet silencing channels 43. By setting the arc-shaped sound-absorbing plates 42 and the jet silencing channels 43 at the flow channel of the exhaust port, the structural cooperation of the jet silencing channels 43 can promote the airflow to be evenly dispersed in the airflow channel, so that the noise wave is greatly attenuated and filtered, so that the airflow can be sent out with less resistance and higher speed, while no secondary noise is generated, and the silencing effect is significant.

[0032] Working principle: The sound-absorbing and air-guiding structure of the terminal air vents of this silent central air conditioning system;

[0033] When the central air conditioning system operates in silent exhaust mode, a diversion chamber 2 and a multi-group diversion pipe 3 are installed at the end of the air guide duct 1. An adjustable exhaust pipe 4 is then installed outside the diversion pipe 3. This allows the airflow guided by the air guide duct 1 to enter the diversion chamber 2. The conical guide seat 11 guides the airflow, causing it to be blocked by the baffle 12 and baffle 13 and directly reach the surface of the noise reduction plate 10, thus reducing noise. The noise reduction plate 10 extends to the inside of each diversion pipe 3 to guide the noise-reduced airflow, causing it to enter the diversion pipe 3 and exhaust pipe 4 for discharge. When the airflow is introduced from the diversion pipe 3 into the exhaust pipe 4, the curved section 41's bending structure... The airflow fully contacts the arc-shaped sound-absorbing plate 42 and is ultimately dispersed within the jet silencing channel 43 to achieve multi-stage silencing and noise reduction at the central air conditioning terminal exhaust vents. The servo motor 5 is activated to rotate the threaded rod 6, causing the threaded rod 6 to vertically lift the lifting block 8 and the annular plate 7 outside the air guide duct 1. This allows the annular plate 7 to move multiple sets of movable plates 9, the same number as the exhaust pipe 4. The movable plates 9, under the lifting and lowering adjustment of the annular plate 7, pull the exhaust pipe 4 to extend and retract. This allows the exhaust pipe 4 to be horizontally adjusted under the limiting cooperation of the slider 44 and the slide groove 14, so as to adjust the range of each set of exhaust vents and improve the dispersion of airflow and noise reduction effect.

[0034] 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, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship 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 do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A silent central air conditioning terminal air outlet noise reduction and airflow guiding structure, comprising an air duct (1), characterized in that: The bottom of the air guide duct (1) is connected to the diversion chamber (2), and the four corners of the diversion chamber (2) are connected to the diversion duct (3). The four diversion ducts (3) are connected to the exhaust pipe (4) on the outside. The top of the diversion chamber (2) is provided with a servo motor (5). The output end of the servo motor (5) is provided with a threaded rod (6). The outside of the air guide duct (1) is provided with an annular plate (7). The outside of the annular plate (7) is provided with a lifting block (8) and four sets of hinge blocks respectively. The bottom of the hinge block is provided with a movable plate (9) that is hinged to the exhaust pipe (4). The bottom of the diversion chamber (2) is provided with a conical guide seat (11), and a baffle (12) and a baffle (13) are respectively installed on the outside of the conical guide seat (11). Noise reduction plates (10) are provided at the four corners of the diversion chamber (2), and each set of noise reduction plates (10) extends to the inside of the diversion pipe (3). Slide grooves (14) are opened on both sides of the diversion pipe (3).

2. The silent central air conditioning terminal air outlet noise reduction and airflow guiding structure according to claim 1, characterized in that: The exhaust pipe (4) includes an arc-shaped section (41), which consists of four sets. The four arc-shaped sections (41) are located at the end of the exhaust pipe (4). The inner wall of the four arc-shaped sections (41) is provided with an arc-shaped sound-absorbing plate (42). The bottom of the interior of the four arc-shaped sections (41) is provided with a jet silencing channel (43). The inner side of the four arc-shaped sections (41) is symmetrically provided with sliders (44), and the sliders (44) are adapted to the grooves (14).

3. The silent central air conditioning terminal air outlet noise reduction and airflow guiding structure according to claim 1, characterized in that: The servo motor (5) is provided with a protective shell on its outer side, and the lifting block (8) is threadedly matched with the threaded rod (6).

4. The silent central air conditioning terminal air outlet noise reduction and airflow guiding structure according to claim 1, characterized in that: The noise reduction plate (10) consists of four groups. The four noise reduction plates (10) are located at the four corners inside the diversion chamber (2). The four noise reduction plates (10) are opposite to the horizontal plane of the conical guide seat (11).

5. The silent central air conditioning terminal air outlet noise reduction and airflow guiding structure according to claim 1, characterized in that: The four blocks (12) are connected by a flow guide groove, and the flow guide groove is positioned opposite to the noise reduction plate (10).

6. The silent central air conditioning terminal air outlet noise reduction and airflow guiding structure according to claim 1, characterized in that: The end of the diversion pipe (3) is provided with a sealing ring, and the exhaust pipe (4) slides horizontally on the outside of the diversion pipe (3).

7. The silent central air conditioning terminal air outlet noise reduction and airflow guiding structure according to claim 1, characterized in that: The baffle (13) is located at the bottom of the baffle (12), and the baffle (13) is positioned opposite to the diversion pipe (3).

8. The silent central air conditioning terminal air outlet noise reduction and airflow guiding structure according to claim 2, characterized in that: The bottom end of the arc-shaped section (41) is an exhaust port, the jet silencing channel (43) is located inside the arc-shaped section (41), and the arc-shaped sound-absorbing plate (42) extends to the inner side of the jet silencing channel (43).

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