Air duct noise reduction device of heating ventilation air conditioner

Abstract

The utility model discloses an air pipe noise reduction device of a heating ventilation air conditioner, the edge part of a mounting batten is rotatably connected with a sound-absorbing cotton plate, the edge part of the sound-absorbing cotton plate is rotatably connected to the inner side of a connecting seat through a movable shaft, and the outer side of the movable shaft is sleeved with a torsion spring; the flow speed of airflow is controlled through the staggered sound-absorbing cotton plates, the probability that noise is generated when the airflow passes through the installation inner box is reduced, and when the airflow pressure is large, the airflow pressure borne by the sound-absorbing cotton plates is relatively large through the installation battens, the connecting bases, the movable shafts and the torsion springs, so that the noise is reduced, and the noise is reduced. Therefore, the sound-absorbing cotton plate drives the torsion spring to twist and deflect, the air flow pressure is reduced and buffered, the phenomenon of backflow caused by the fact that the air flow cannot quickly pass through the air pipe due to the fact that the air flow pressure is large is avoided, the passing efficiency of the air flow is guaranteed, meanwhile, the contact face between the sound-absorbing cotton plate and the pressure air flow is increased, and the noise reduction effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heating ventilation equipment technical field, concretely is a kind of wind pipe noise reduction device of heating ventilation air conditioner. BACKGROUND

[0002] Heating ventilation air conditioner is usually composed of heat source, cold source, fan, pipeline and control system etc., its main function includes heating, ventilation and air conditioning, aims at providing a comfortable and healthy indoor environment, widely used in various types of buildings, including industrial plant, office building, hotel, hospital etc., by controlling the temperature, humidity and air quality of air, improve the comfort and health level of indoor, and current heating ventilation air conditioner in the process of air delivery, airflow appears the phenomenon of wind whistle in the process of flowing in pipeline, thus producing noise, therefore need to carry out noise reduction treatment to wind pipe in the process of airflow delivery;

[0003] At present, when the airflow generated during the work of heating ventilation air conditioner is transported, noise will be generated during the airflow passing through the air pipe, and at present, noise reduction is achieved by arranging sound-absorbing cotton board in the wind pipe, because the sound-absorbing cotton board is arranged at present, the airflow velocity is reduced, but the normal flow of airflow is also easily affected, resulting in low airflow passing efficiency, and the sound-absorbing cotton board is arranged in the wind pipe, the wall of the wind pipe is arc-shaped, so that the operation of the sound-absorbing cotton board is very inconvenient during arrangement, and the difficulty of later maintenance is large. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of wind pipe noise reduction device of heating ventilation air conditioner, can effectively solve the problem that the airflow generated during the work of heating ventilation air conditioner is transported at present in the above background technology, noise will be generated during the airflow passing through the air pipe, and at present, noise reduction is achieved by arranging sound-absorbing cotton board in the wind pipe, because the sound-absorbing cotton board is arranged at present, the airflow velocity is reduced, but the normal flow of airflow is also easily affected, resulting in low airflow passing efficiency, and the sound-absorbing cotton board is arranged in the wind pipe, the wall of the wind pipe is arc-shaped, so that the operation of the sound-absorbing cotton board is very inconvenient during arrangement, and the difficulty of later maintenance is large.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of wind pipe noise reduction device of heating ventilation air conditioner, including heating ventilation air conditioner body, the bottom side air outlet of the heating ventilation air conditioner body is connected with wind pipe by flange, the air outlet of the wind pipe is connected with the noise reduction outer box, the edge air outlet of the noise reduction outer box is connected with the air guide pipe at the corresponding wind pipe, the inside of the noise reduction outer box is embedded with the installation inner box, and the top outside of the noise reduction outer box is provided with sealing top cover;

[0006] The two side ends of the inner box are detachably connected with a plurality of groups of installation strips in a staggered manner, the edge of the installation strip is rotatably connected with a sound-absorbing cotton board, the two sides of the edge of the installation strip are fixedly connected with connecting seats, the edge of the sound-absorbing cotton board is rotatably connected to the inner side of the connecting seat through a movable shaft, and the outer side of the movable shaft is sleeved with a torsion spring, and the inner side of the sound-absorbing cotton board is uniformly provided with a through groove.

[0007] The inner side of the installation inner box is provided with an installation clamping groove, the installation strip is clamped in the installation clamping groove, and the two side ends of the installation strip are provided with limiting end plates.

[0008] Preferably, the two side edges of the noise reduction outer box are provided with air grooves at positions corresponding to the air pipe and the air guide pipe, and the two side edges of the installation inner box are provided with communication grooves at positions corresponding to the air grooves.

[0009] Preferably, the sound-absorbing cotton board is deflected along the inner side of the connecting seat through the movable shaft, the two ends of the torsion spring are connected between the two connecting seats at the two ends of the installation strip, and the diameter of the middle part of the through groove is smaller than the diameters of the two sides.

[0010] Preferably, the installation strip and the installation clamping groove are tightly and clampingly connected, and the limiting pin penetrates through the limiting end plate and is threadedly connected to the groove wall of the installation clamping groove.

[0011] Preferably, the edge of the sealing top cover is provided with a sleeve plate, the top edge of the noise reduction outer box is provided with a top sealing strip, the bottom edge of the installation inner box is provided with a bottom sealing strip, and the edge of the sleeve plate is limitingly connected to the edge of the noise reduction outer box through a mounting seat.

[0012] Preferably, the inner side of the mounting seat is connected with a screw, and the edge of the noise reduction outer box is connected with a screw hole at a position corresponding to the screw.

[0013] The inner side of the sleeve plate is tightly attached to the outer wall of the noise reduction outer box, the top sealing strip is tightly attached to the sealing top cover, and the bottom sealing strip is tightly attached to the top of the noise reduction outer box.

[0014] Compared with the prior art, the utility model has the advantages that the structure is scientific and reasonable, and the use is safe and convenient.

[0015] 1. By setting multiple sets of sound-absorbing cotton panels at equal intervals and staggered positions on the inner side of the installation box, the airflow velocity can be controlled by the staggered sound-absorbing cotton panels when the airflow passes through the installation box. This reduces the probability of noise generation when the airflow passes through the installation box. When the airflow pressure is high, the sound-absorbing cotton panels can withstand relatively high airflow pressure through the installation strips, connecting seats, movable shafts, and torsion springs. This allows the sound-absorbing cotton panels to drive the torsion springs to twist and deflect, thereby reducing and buffering the airflow pressure. This prevents the airflow pressure from being too high and causing backflow, ensuring the airflow efficiency. At the same time, it increases the contact area between the sound-absorbing cotton panels and the pressurized airflow, ensuring the noise reduction effect.

[0016] The permeable grooves inside the sound-absorbing cotton board are designed to be smaller in the middle and larger on both sides. This design improves airflow efficiency and allows the airflow to make effective contact with the sound-absorbing cotton board, thereby enhancing the sound absorption and noise reduction effect and preventing noise carried by the airflow from directly entering the room and causing any impact.

[0017] 2. By nesting the inner casing inside the noise-reducing outer casing, and using ventilation and connecting channels, airflow can be precisely introduced into the inner casing to achieve effective noise reduction. The top sealing strip on the top of the noise-reducing outer casing and the bottom sealing strip on the bottom of the inner casing ensure a tight fit between them during installation. When the sealing top cover is installed, its side sleeve can fit tightly against the side of the noise-reducing outer casing. Combined with the mounting base, the sleeve is limited and installed on the side of the noise-reducing outer casing, ensuring a tight connection between the inner casing and the noise-reducing outer casing.

[0018] This method also facilitates the easy disassembly of the inner casing, making it easier to clean the sound-absorbing cotton panels inside. Furthermore, the simple and easy-to-operate installation method ensures efficient assembly and disassembly.

[0019] 3. The installation slots on the side arms of the inner casing facilitate quick and accurate snap-fit ​​installation of the mounting strips, improving the accuracy of the mounting strip position. Combined with the limiting end plates and limiting bolts at the ends of the mounting strips, after snap-fitting, the mounting strips are further positioned and fixed inside the inner casing, ensuring positional stability. This method also facilitates the removal of mounting strips requiring replacement or repair during subsequent maintenance, further improving the ease of cleaning the sound-absorbing cotton panels. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0021] In the attached diagram:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the inner box of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the noise reduction outer casing of this utility model;

[0025] Figure 4 This is a schematic diagram of the installation structure of the sound-absorbing cotton board of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the torsion spring of this utility model;

[0027] The following are the labeling elements in the diagram: 1. HVAC unit; 2. Air duct; 3. Noise-reducing outer casing; 4. Inner casing; 5. Ventilation slot; 6. Connecting slot; 7. Mounting strip; 8. Sound-absorbing cotton board; 9. Connecting seat; 10. Movable shaft; 11. Torsion spring; 12. Through slot; 13. Air duct; 14. Sealing top cover; 15. Sleeve plate; 16. Top sealing strip; 17. Bottom sealing strip; 18. Mounting seat; 19. Mounting slot; 20. Limiting end plate; 21. Limiting bolt. Detailed Implementation

[0028] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] Example: Figures 1-5 As shown, this utility model provides a technical solution: a noise reduction device for HVAC ducts, including an HVAC body 1. A duct 2 is connected to the bottom side outlet of the HVAC body 1 via a flange. A noise reduction outer casing 3 is connected to the outlet of the duct 2. A guide pipe 13 is connected to the side outlet of the noise reduction outer casing 3 corresponding to the duct 2. An inner casing 4 is embedded and sleeved inside the noise reduction outer casing 3. Ventilation grooves 5 are provided on both sides of the noise reduction outer casing 3 at positions corresponding to the duct 2 and the guide pipe 13. Connecting grooves 6 are provided on both sides of the inner casing 4 at positions corresponding to the ventilation grooves 5. Through the ventilation grooves 5 and the connecting grooves 6, airflow can accurately enter the inner casing 4 from the noise reduction outer casing 3, thereby achieving effective noise reduction. A sealing top cover 14 is installed on the top outer side of the noise reduction outer casing 3.

[0030] A plurality of groups of mounting strip plates 7 are detachably connected to the two side ends inside the inner box 4 in a staggered manner, the edge of the mounting strip plate 7 is rotatably connected with the sound-absorbing cotton plate 8, the edge of the mounting strip plate 7 is fixedly connected with the connecting seat 9 on both sides, the edge of the sound-absorbing cotton plate 8 is rotatably connected to the inner side of the connecting seat 9 through the movable shaft 10, the outer side of the movable shaft 10 is sleeved with the torsional spring 11, the inside of the sound-absorbing cotton plate 8 is uniformly provided with the through groove 12, the sound-absorbing cotton plate 8 is deflected along the inner side of the connecting seat 9 through the movable shaft 10, the two ends of the torsional spring 11 are connected between the two connecting seats 9 at the two ends of the mounting strip plate 7, the middle part of the through groove 12 is smaller in diameter than the two sides, so that the sound-absorbing cotton plate 8 can drive the torsional spring 11 to twist and deflect when the airflow with large pressure is borne, thereby realizing the reduction and buffering of the airflow pressure, and the through groove 12 is designed to be larger on the two sides and smaller in the middle, thereby improving the airflow passing efficiency.

[0031] The inner side edge of the inner box 4 is provided with a mounting clamping groove 19, the mounting strip plate 7 is clamped in the mounting clamping groove 19, the two side edges of the mounting strip plate 7 are provided with limiting end plates 20, the edge of the limiting end plate 20 is connected with a limiting bolt 21, the mounting strip plate 7 is tightly and clampingly connected between the mounting clamping groove 19, the limiting bolt 21 penetrates through the limiting end plate 20 and is threadedly connected on the groove wall of the mounting clamping groove 19, the mounting strip plate 7 is quickly and accurately clamped and mounted, thereby improving the accuracy of the mounting position of the mounting strip plate 7, and the limiting end plate 20 and the limiting bolt 21 facilitate further limiting and mounting the mounting strip plate 7 to the inner side of the inner box 4, thereby ensuring the position stability of the mounting strip plate 7.

[0032] The edge of the sealing top cover 14 is provided with a sleeve plate 15, the top edge of the noise reduction outer box 3 is provided with a top sealing strip 16, the bottom edge of the inner box 4 is provided with a bottom sealing strip 17, the inner side of the sleeve plate 15 is tightly attached between the outer wall of the noise reduction outer box 3, the top sealing strip 16 is tightly attached between the sealing top cover 14, and the bottom sealing strip 17 is tightly attached with the top of the noise reduction outer box 3, so that the sleeve plate 15 of the side edge of the sealing top cover 14 can be tightly attached to the side edge of the noise reduction outer box 3 during installation, the tightness of the connection between the inner box 4 and the noise reduction outer box 3 is ensured through the top sealing strip 16 and the bottom sealing strip 17, the edge of the sleeve plate 15 is limitingly connected to the edge of the noise reduction outer box 3 through the mounting seat 18, the inner side of the mounting seat 18 is connected with a screw, and the edge of the noise reduction outer box 3 is connected with a screw hole corresponding to the screw, the sleeve plate 15 can be limitingly mounted on the side edge of the noise reduction outer box 3 through the mounting seat 18, thereby improving the convenience of mounting and dismounting of the mounting seat 18.

[0033] The working principle and use process of the utility model: the air pipe noise reduction device of the heating and air conditioning in the actual application process, first, the air pipe 2 is connected with the air outlet pipe of the heating and air conditioning body 1 through the flange, then the airflow is flowed into the noise reduction outer box 3 through the air pipe 2, through the air vent groove 5 and the communication groove 6, the airflow can accurately enter the installation inner box 4, so as to realize effective noise reduction;

[0034] When the installation inner box 4 is installed on the inner side of the noise reduction outer box 3, the top sealing strip 16 arranged on the top of the noise reduction outer box 3 and the bottom sealing strip 17 arranged on the bottom of the installation inner box 4 are used, so that when the installation inner box 4 is installed with the noise reduction outer box 3, the contact position therebetween is tightly attached, and when the sealing top cover 14 is installed on the top of the noise reduction outer box 3, the sleeve plate 15 on the side of the sealing top cover 14 can be tightly attached to the side of the noise reduction outer box 3, and the sleeve plate 15 is limited and installed on the side of the noise reduction outer box 3 by the mounting seat 18, so that the tightness of the connection between the installation inner box 4 and the noise reduction outer box 3 is ensured, and the installation inner box 4 is conveniently disassembled, so that the sound-absorbing cotton board 8 in the installation inner box 4 is conveniently cleaned;

[0035] When the airflow enters the installation inner box 4, a plurality of sound-absorbing cotton boards 8 are arranged in the installation inner box 4 in an equidistant staggered manner, so that when the airflow passes through the installation inner box 4, the sound-absorbing cotton boards 8 arranged in a staggered manner are used to control the flow rate of the airflow, thereby reducing the probability of noise generated when the airflow passes through the installation inner box 4;

[0036] And when the airflow pressure is large, the sound-absorbing cotton board 8 can be connected to the inner side of the installation inner box 4 in a rotary connection manner through the mounting strip 7, the connecting seat 9, the movable shaft 10 and the torsion spring 11, so that when the sound-absorbing cotton board 8 bears the airflow with large pressure, the movable shaft 10 drives the torsion spring 11 to twist and deflect, thereby reducing and buffering the airflow pressure, avoiding the large airflow pressure, preventing the airflow from flowing back through the air pipe 2, ensuring the passing efficiency of the airflow, and improving the contact surface between the sound-absorbing cotton board 8 and the pressure airflow, thereby further ensuring the noise reduction effect;

[0037] When the airflow passes through the sound-absorbing cotton board 8, the middle small and both sides large design of the through groove 12 in the sound-absorbing cotton board 8 improves the passing efficiency of the airflow, and effectively contacts the airflow and the sound-absorbing cotton board 8, thereby improving the sound-absorbing and noise reduction effect and avoiding the influence caused by the noise carried by the airflow directly entering the room;

[0038] In addition, when the sound-absorbing cotton board 8 in the installation inner box 4 needs to be overhauled, maintained and replaced, the side arm of the installation inner box 4 is provided with an installation clamping groove 19, which not only facilitates quick and accurate clamping and installation of the installation strip plate 7, improves the installation position accuracy of the installation strip plate 7, but also, in combination with the limiting end plate 20 and the limiting bolt 21 at the end of the installation strip plate 7, facilitates further limiting and installing the installation strip plate 7 to the inner side of the installation inner box 4 after clamping the installation strip plate 7 in position, thereby ensuring the position stability of the installation strip plate 7. This way, the convenience of cleaning the sound-absorbing cotton board 8 can be improved by disassembling the installation strip plate 7 in the individual position that needs to be replaced and repaired.

[0039] Finally, it should be noted that the above is only a preferred example of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A duct noise reduction device for a heating, ventilation and air conditioning system, comprising a heating, ventilation and air conditioning body (1), a duct (2) connected to the heating, ventilation and air conditioning body (1) through a flange plate at the bottom side of the heating, ventilation and air conditioning body (1), characterized in that: The air outlet end of the air pipe (2) is connected with a noise reduction outer box (3), the edge of the air outlet end of the noise reduction outer box (3) is connected with an air guide pipe (13) corresponding to the air pipe (2), the inner side of the noise reduction outer box (3) is embedded with a mounting inner box (4), and the top outer side of the noise reduction outer box (3) is mounted with a sealing top cover (14); The two side edge ends of the mounting inner box (4) are detachably connected with a plurality of groups of mounting strip plates (7) in a staggered manner, the edge of the mounting strip plate (7) is rotatably connected with a sound-absorbing cotton plate (8), the edge of the mounting strip plate (7) is fixedly connected with a connecting seat (9) on both sides, the edge of the sound-absorbing cotton plate (8) is rotatably connected to the inner side of the connecting seat (9) through an activity shaft (10), and the outer side of the activity shaft (10) is sleeved with a torsion spring (11), and the inner side of the sound-absorbing cotton plate (8) is uniformly provided with a through groove (12); The inner side edge of the mounting inner box (4) is provided with a mounting clamping groove (19), the mounting strip plate (7) is clamped in the mounting clamping groove (19), and the two side edge ends of the mounting strip plate (7) are provided with a limiting end plate (20), and the edge of the limiting end plate (20) is connected with a limiting bolt (21).

2. The duct noise reduction device of claim 1, wherein: The two side edges of the noise reduction outer box (3) are provided with air grooves (5) at positions corresponding to the air pipe (2) and the air guide pipe (13), and the two side edges of the mounting inner box (4) are provided with communication grooves (6) at positions corresponding to the air grooves (5).

3. The duct noise reduction device of claim 1, wherein: The sound-absorbing cotton plate (8) is deflected along the inner side of the connecting seat (9) through the activity shaft (10), the two ends of the torsion spring (11) are connected between the two connecting seats (9) at the two ends of the mounting strip plate (7), and the middle diameter of the through groove (12) is smaller than the diameters of the two sides.

4. The duct noise reduction device of claim 1, wherein: The mounting strip plate (7) is tightly connected with the mounting clamping groove (19), and the limiting bolt (21) penetrates through the limiting end plate (20) and is threadedly connected on the groove wall of the mounting clamping groove (19).

5. The duct noise reduction device of claim 1, wherein: The edge of the sealing top cover (14) is provided with a sleeve plate (15), the top edge of the noise reduction outer box (3) is provided with a top sealing strip (16), the bottom edge of the mounting inner box (4) is provided with a bottom sealing strip (17), and the edge of the sleeve plate (15) is limitingly connected to the edge of the noise reduction outer box (3) through a mounting seat (18).

6. The duct noise reduction device of air handling unit of claim 5, wherein: The inner side of the mounting seat (18) is connected with a screw, and the edge of the noise reduction outer box (3) is connected with a screw hole corresponding to the screw; The inner side of the sleeve plate (15) is tightly attached to the outer wall of the noise reduction outer box (3), the top sealing strip (16) is tightly attached to the sealing top cover (14), and the bottom sealing strip (17) is tightly attached to the top of the noise reduction outer box (3).

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