Noise reduction structure of warm ventilation pipe
By designing a buffer net and silencer cotton at the air inlet of the connecting pipe of the HVAC, and through multi-layer buffering and noise reduction measures, the problem of poor performance of existing HVAC noise reduction equipment is solved, achieving significant noise reduction effect.
Patent Information
- Application Number
- CN202421515173.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The noise reduction equipment of existing HVAC has poor noise reduction effect during use and cannot effectively reduce noise pollution.
A HVAC noise reduction structure is designed, including a buffer net and a first silencer cotton at the air inlet on the left side of the connecting pipe, and a buffering expansion port is provided to initially buffer and reduce noise. After the air flow is dispersed through the air guide plate, it is then buffered and reduced through the annular buffering slope and the second silencer cotton. At the same time, a third silencer cotton is provided at the flange connection to avoid air leakage and noise generation.
Through multi-layer buffering and noise reduction measures, the noise generated by the airflow is significantly reduced, the noise reduction effect is improved, and the structure is simple, making it easy to disassemble and clean.
Smart Images
Figure CN222837089U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of noise reduction of heating and ventilation ducts, in particular to a noise reduction structure of heating and ventilation ducts. Background Art
[0002] With the progress of modern society and the improvement of people's living standards, the problem of noise pollution has become increasingly prominent and has seriously affected people's daily lives. With the widespread application of noise control technology, the noise from the inlet and outlet of central air conditioners and fresh air systems has become one of the main noise sources in indoor environments.
[0003] The HVAC ventilation system is an important part of HVAC. Since the HVAC is the equipment responsible for indoor or car heating, ventilation and air conditioning, most of the noise reduction structures used in the HVAC ventilation system are equipped with an air inlet duct connected to the ventilation system and an air outlet duct for exhausting gas. Although there are many types of noise reduction devices for HVAC ducts on the market today, most of them are only changes in form, and their functions have not changed much. The noise reduction effect of today's HVAC ducts is not good during use. Therefore, a HVAC duct noise reduction structure is proposed. Utility Model Content
[0004] In view of the technical problems in the above-mentioned prior art, the utility model provides a noise reduction structure for a heating and ventilation duct, the purpose of which is to solve the above-mentioned problems.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A heating and ventilation duct noise reduction structure comprises a connecting pipe, a flange connecting the air duct is provided at the right air outlet of the connecting pipe, a buffer net is provided at the left air inlet of the connecting pipe, a first sound-absorbing cotton is provided on the left side of the buffer net, a buffer expansion port is provided on the left periphery of the connecting pipe, the left side of the first sound-absorbing cotton extends leftward to the inner wall inclined on the side of the buffer expansion port, an annular buffer slope is provided on the inner wall of the right air outlet of the connecting pipe, a second sound-absorbing cotton is provided on the annular buffer slope, and the second sound-absorbing cotton extends leftward to the inner wall of the connecting pipe.
[0007] Preferably, an air guide plate is provided on the inner side wall of the connecting pipe on the right side of the buffer net, and the front and rear sides of the air guide plate are fixed on the inner side wall of the connecting pipe.
[0008] Preferably, there are two air guide plates, which are symmetrically arranged vertically, and the two air guide plates are arranged tilted outward from left to right.
[0009] Preferably, an annular groove is provided at the connection between the right side of the flange and the air duct, and a third sound-absorbing cotton is provided in the annular groove.
[0010] Preferably, the inner side of the annular groove is connected to the air outlet of the connecting pipe, and the third sound-absorbing cotton and the second sound-absorbing cotton are integrally formed.
[0011] Preferably, a dustproof net is provided on the left side of the buffer expansion port, an annular block is fixedly provided on the periphery of the dustproof net, an inner wall of the annular block is provided with an internal thread, and an external thread that can be threadably connected to the internal thread of the annular block is provided on the periphery of the buffer expansion port.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] The utility model provides a noise reduction structure for a heating and ventilation duct, by providing a buffer expansion port at the air inlet on the left side of the connecting pipe, when the airflow enters the connecting pipe, the airflow is initially buffered by the inclined surface at the buffer expansion port, and at the same time, the airflow passes through the first silencer cotton during the buffering process to reduce the noise generated by the airflow, and the airflow passing through the buffer expansion port passes through the buffer net, thereby slowing down the airflow velocity, and at the same time, the first silencer cotton on the buffer net further reduces the noise, and the airflow passing through the buffer net passes through the air guide plate to disperse the airflow, and the airflow dispersed to the upper and lower sides of the air guide plate is buffered and noise-reduced again by the annular buffer inclined surface and the second silencer cotton, and at the same time, a third silencer cotton is provided at the flange connection to avoid noise generated by air leakage at the flange connection, thereby fully reducing the noise generated by the airflow, and the structure is simple and the effect is significant;
[0014] A dust screen is threadedly connected at the buffer expansion port to filter the airflow entering the connecting pipe to prevent impurities from affecting the noise reduction work of the connecting pipe. At the same time, the threaded connection facilitates its disassembly and subsequent cleaning. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the overall structure of a noise reduction structure for heating and ventilation ducts according to the utility model;
[0016] Figure 2 This is an enlarged view of point A of a HVAC duct noise reduction structure described in the present invention.
[0017] In the figure: 1. connecting pipe; 2. air duct; 3. flange; 4. buffer net; 5. first silencer cotton; 6. buffer expansion port; 7. annular buffer slope; 8. second silencer cotton; 9. air guide plate; 10. annular groove; 11. third silencer cotton; 12. dust net; 13. annular block. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] See also Figure 1-2 , the embodiment proposed in the present application is: a heating ventilation duct noise reduction structure, including a connecting pipe 1, a flange 3 connected to the air duct 2 is provided at the right air outlet of the connecting pipe 1, a buffer net 4 is provided at the left air inlet of the connecting pipe 1, a first sound-absorbing cotton 5 is provided on the left side of the buffer net 4, a buffer expansion port 6 is provided on the left periphery of the connecting pipe 1, the left side of the first sound-absorbing cotton 5 extends to the left to the inner wall inclined on the side of the buffer expansion port 6, an annular buffer slope 7 is provided at the inner wall of the right air outlet of the connecting pipe 1, a second sound-absorbing cotton 8 is provided on the annular buffer slope 7, and the second sound-absorbing cotton 8 extends to the left to the inner wall of the connecting pipe 1;
[0020] A buffer expansion port 6 is provided at the air inlet on the left side of the connecting pipe 1, and the airflow is initially buffered by the inclined surface at the buffer expansion port 6. At the same time, the airflow passes through the first silencer cotton 5 on the inclined surface during buffering, thereby reducing the noise generated by the airflow. The airflow through the buffer expansion port 6 passes through the buffer net 4, thereby slowing down the airflow velocity. At the same time, the first silencer cotton 5 on the buffer net 4 further reduces the noise. The airflow entering the connecting pipe 1 is buffered and noise-reduced again by the annular buffer inclined surface 7 and the second silencer cotton 8, thereby fully reducing the noise generated by the airflow. The structure is simple and the effect is significant.
[0021] In another embodiment, see Figure 1-2 An air guide plate 9 is provided on the inner wall of the connecting pipe 1 on the right side of the buffer net 4. The front and rear sides of the air guide plate 9 are fixed on the inner wall of the connecting pipe 1. There are two air guide plates 9, which are symmetrically arranged up and down. The two air guide plates 9 are inclined outward from left to right; the airflow passing through the buffer net 4 passes through the two inclined air guide plates 9 to disperse the airflow, and the airflow dispersed to the upper and lower sides by the air guide plates 9 is buffered and noise-reduced again through the annular buffer slope 7 and the second silencer cotton 8, thereby improving the noise reduction effect.
[0022] In another embodiment, see Figure 1-2 An annular groove 10 is provided at the connection between the right side of the flange 3 and the air duct 2, and a third sound-absorbing cotton 11 is arranged in the annular groove 10. The inner side of the annular groove 10 is connected to the air outlet of the connecting pipe 1, and the third sound-absorbing cotton 11 is integrally formed with the second sound-absorbing cotton 8 to avoid noise caused by air leakage at the connection of the flange 3.
[0023] In another embodiment, see Figure 1-2A dustproof net 12 is provided on the left side of the buffer expansion port 6 to filter the airflow entering the connecting pipe to prevent impurities from affecting the noise reduction work of the connecting pipe 1. An annular block 13 is fixedly provided on the periphery of the dustproof net 12, and an inner thread is provided on the inner wall of the annular block 13. An outer thread that can be threadedly connected to the inner thread of the annular block 13 is provided on the periphery of the buffer expansion port 6, which is convenient for disassembly and subsequent cleaning.
[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0025] In the description of the present invention, unless otherwise specified, "plurality" means two or more; the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "head", "tail", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A heating and ventilation duct noise reduction structure, comprising a connecting pipe (1), wherein a flange (3) connected to an air duct (2) is provided at the right air outlet of the connecting pipe (1), characterized in that: A buffer net (4) is provided at the air inlet on the left side of the connecting pipe (1), a first sound-absorbing cotton (5) is provided on the left side of the buffer net (4), a buffer expansion port (6) is provided on the outer periphery of the left side of the connecting pipe (1), the left side of the first sound-absorbing cotton (5) extends leftward to the inner wall inclined on the side of the buffer expansion port (6), an annular buffer slope (7) is provided on the inner wall of the air outlet on the right side of the connecting pipe (1), a second sound-absorbing cotton (8) is provided on the annular buffer slope (7), and the second sound-absorbing cotton (8) extends leftward to the inner wall of the connecting pipe (1).
2. A heating and ventilation duct noise reduction structure according to claim 1, characterized in that: An air guide plate (9) is provided on the inner side wall of the connecting pipe (1) located on the right side of the buffer net (4), and the front and rear sides of the air guide plate (9) are fixed on the inner side wall of the connecting pipe (1).
3. A heating and ventilation duct noise reduction structure according to claim 2, characterized in that: There are two wind guide plates (9), which are symmetrically arranged in an upper and lower manner, and the two wind guide plates (9) are arranged obliquely outward from left to right.
4. A heating and ventilation duct noise reduction structure according to claim 1, characterized in that: An annular groove (10) is provided at the connection point between the right side of the flange (3) and the air duct (2), and a third sound-absorbing cotton (11) is provided in the annular groove (10).
5. A heating and ventilation duct noise reduction structure according to claim 4, characterized in that: The inner side of the annular groove (10) is connected to the air outlet of the connecting pipe (1), and the third sound-absorbing cotton (11) and the second sound-absorbing cotton (8) are integrally formed.
6. A heating and ventilation duct noise reduction structure according to claim 1, characterized in that: A dustproof net (12) is provided on the left side of the buffer expansion port (6), an annular block (13) is fixedly provided on the periphery of the dustproof net (12), an inner wall of the annular block (13) is provided with an internal thread, and an external thread which can be threadably connected to the internal thread of the annular block (13) is provided on the periphery of the buffer expansion port (6).