Noise reduction device for air outlet pipe of central air conditioner

Abstract

The utility model relates to a central air conditioner air outlet pipe noise reduction device which comprises a central air conditioner body and a butt joint pipe installed on an air opening of the central air conditioner body, flange rings are connected to the front end and the rear end of the butt joint pipe, a noise reduction assembly is arranged in the butt joint pipe, and the noise reduction assembly comprises a sound absorption assembly, an air inlet assembly and a supporting assembly. The sound absorption assembly comprises a front end cover, a rear end cover and a sound absorption cotton cylinder arranged between the front end cover and the rear end cover. The air inlet assembly comprises an air inducing cover and a sealing ring connected to the outer edge of the air inducing cover. The supporting assembly comprises a plurality of guide rails and sliding supporting rods arranged in the guide rails in a sliding mode, the noise reduction assembly can be fixed into the butt joint pipe, a sound absorption cotton barrel in the sound absorption assembly can effectively absorb noise, vibration caused by wind pressure to the pipeline is relieved, and the pipeline is stable; and the arranged supporting assembly can support the rear end cover, the stability of the tail of the rear end cover can be kept, and the noise is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of central air-conditioning noise reduction, and in particular to a central air-conditioning air outlet duct noise reduction device. Background Art

[0002] The central air conditioning system consists of one or more cold and heat source systems and multiple air conditioning systems. This system is different from traditional refrigerant air conditioning. It uses the principle of liquid vaporization refrigeration to provide the required cooling capacity for the air conditioning system to offset the heat load of the indoor environment. The heating system provides the required heat for the air conditioning system to offset the cold and warm loads of the indoor environment. The central air conditioning vent is the terminal equipment for air outlet and return in the central air conditioning system and is an air distribution equipment.

[0003] However, in actual applications, the air outlet of a conventional central air conditioner vibrates during operation due to the pressure difference between the inside and outside of the air. In addition, the air body collides and rubs against the inner wall of the air duct when it is transported in the air duct, which generates noise. Most of them are noise-reduced by wrapping the air duct with sound-absorbing cotton material. However, the sound-absorbing cotton material wrapped on the air outlet is exposed to the outside, has a low service life, and will greatly increase the wall thickness of the air duct, affecting installation.

[0004] Therefore, those skilled in the art provide a central air-conditioning air outlet duct noise reduction device to solve the problems raised in the above background technology. Utility Model Content

[0005] In order to solve the problem that the air outlet of the above-mentioned central air conditioner is vibrated due to the internal and external wind pressure difference during operation, and the air body collides and rubs against the inner wall of the duct to generate noise when being transported in the air duct, most of them are noise reduced by wrapping sound-absorbing cotton material on the air duct. However, the sound-absorbing cotton material wrapped on the air outlet is exposed to the outside, has a short service life, and will greatly increase the wall thickness of the air duct, affecting the installation. The present application provides a noise reduction device for the air outlet duct of a central air conditioner.

[0006] The central air conditioner outlet duct noise reduction device provided in this application adopts the following technical solution:

[0007] A central air conditioner outlet duct noise reduction device, comprising a central air conditioner main body and a butt pipe installed on the air outlet of the central air conditioner main body, the front and rear ends of the butt pipe are connected with flange rings, and a noise reduction component is arranged in the butt pipe, the noise reduction component comprises a sound absorbing component, an air inlet component and a supporting component, and the sound absorbing component comprises a front end cover, a rear end cover and a sound absorbing cotton cylinder arranged between the butt pipe and the air outlet;

[0008] The air inlet assembly includes an air induction hood and a sealing ring connected to the outer edge of the air induction hood, the air induction hood is a conical structure, and the air induction hood is connected to the front end cover;

[0009] The support assembly comprises a plurality of guide rails and a sliding support rod slidably arranged in the guide rails.

[0010] Preferably, inner grooves are provided on the opposite sides of the front cover and the rear cover, and a metal mesh tube is sleeved on the outer surface of the sound-absorbing cotton tube, and the two ends of the sound-absorbing cotton tube and the metal mesh tube are respectively clamped in the corresponding inner grooves of the front cover and the rear cover.

[0011] Preferably, the diameter of the sealing ring is the same as the diameter of the flange ring, and a plurality of flange bolts are cooperatively provided on the sealing ring and the flange ring.

[0012] Preferably, the support assembly further comprises a center disk, and the center disk is fixedly connected to the rear end cover, and a plurality of guide rails are mounted on the center disk in an annular array.

[0013] Preferably, the end of the sliding support rod is also connected to a rubber block, and the sliding support rod and the guide rail are cooperated with each other and are penetrated with positioning bolts.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] In the present application, the flange ring is provided to facilitate the installation of the butt joint pipe on the air outlet of the central air-conditioning body, and the sealing ring connected to the air hood can fit tightly against the flange plate, so that the noise reduction component can be fixed inside the butt joint pipe. The sound-absorbing cotton tube in the sound-absorbing component can effectively absorb noise and reduce the vibration of the pipeline caused by wind pressure, which is relatively stable. The support component provided can also support the rear end cover, maintain the stability of its own tail, and further reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure after installation of this application;

[0017] Figure 2 It is a structural diagram of the appearance of this application;

[0018] Figure 3 It is a schematic diagram of the internal structure of this application;

[0019] Figure 4 It is a disassembled diagram of the internal structure of this application;

[0020] Figure 5 It is a structural diagram of the supporting components of this application.

[0021] Explanation of the reference numerals: 1. Central air-conditioning body; 2. Butt pipe; 3. Flange ring; 4. Noise reduction assembly; 41. Sound-absorbing assembly; 411. Front cover; 412. Rear cover; 413. Sound-absorbing cotton cylinder; 414. Metal mesh cylinder; 42. Air inlet assembly; 421. Air hood; 422. Sealing ring; 43. Support assembly; 431. Center plate; 432. Guide rail; 433. Sliding support rod; 434. Rubber block; 435. Positioning bolt. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-5 This application is described in further detail.

[0023] It should be noted that the drawings are schematic and not to scale. For the sake of clarity and convenience, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced in size, and any size is only illustrative and not restrictive. In addition, the same reference symbol is used for the same structure, element or accessory appearing in more than two figures to reflect similar features.

[0024] Embodiment 1

[0025]

[0026] Assembly instructions: During installation, first sleeve the metal mesh tube 414 on the sound-absorbing cotton tube 413, and connect the front end cover 411 and the rear end cover 412 to the two ends of the metal mesh tube 414 respectively, and fix them with screws. Then, the positioning bolts 435 can be loosened. At this time, the constraint on the sliding support rod 433 can be released, and the sliding support rod 433 can be pushed into the inside of the guide rail 432 so that the sliding support rod 433 can be retracted into the docking tube 2. Then, the noise reduction component 4 can be pushed into the docking tube 2, and the sealing ring 422 connected to the air hood 421 can be fitted on the surface of the flange ring 3. Then, the sliding support rod 433 can be pulled to slide in the guide rail 432 so that the rubber block 434 on the sliding support rod 433 can be supported on the inner wall of the docking tube 2, and the sliding support rod 433 is fixed by tightening the positioning bolts 435. Finally, one end of the docking tube 2 connected with the sealing ring 422 is tightly attached to the air outlet of the central air-conditioning body 1 to complete the installation.

[0027] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0028] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] The working principle of the utility model is:

[0030] When in use, first put the noise reduction component 4 into the butt joint pipe 2, and make the sealing ring 422 on the air induced hood 421 close to the flange ring 3, then the butt joint pipe 2 can be installed on the air outlet of the central air conditioner body 1. Since the air induced hood 421 is set in a conical shape, and the wide-mouth edge of the air induced hood 421 is connected to the sealing ring 422, the airflow from the air outlet of the central air conditioner body 1 can be introduced into the sound absorbing component 41. Since the rear end cover 412 of the sound absorbing component 41 blocks the sound absorbing cotton cylinder 413, after the airflow passes into the inside of the sound absorbing cotton cylinder 413, it can only flow out through the metal mesh cylinder 414. Under the action of the sound absorbing cotton cylinder 413, the vibration noise generated by the flow of the airflow can be absorbed to reduce the noise;

[0031] A support assembly 43 is also provided on the rear end cover 412. By loosening the positioning bolts 435, the sliding support rod 433 can be pulled to slide in the guide rail 432, and the rubber block 434 can be tightly attached to the inner wall of the docking pipe 2. After re-tightening the positioning bolts 435, the sliding support rod 433 can be fixed. Through the cooperation of multiple sliding support rods 433, the rear end cover 412 can be supported, which can keep the tail of the noise reduction assembly 4 stable and further reduce noise. The noise reduction assembly 4 is installed inside the docking pipe 2, which can reduce the wall thickness of the docking pipe 2 while playing a noise reduction role, so as to facilitate the subsequent installation and fixation of the central air-conditioning body 1.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A central air conditioner air outlet duct noise reduction device, comprising a central air conditioner body (1) and a butt joint pipe (2) installed on the air outlet of the central air conditioner body (1), the butt joint pipe (2) being connected to flange rings (3) at both front and rear ends, and a noise reduction component (4) being arranged in the butt joint pipe (2), It is characterized in that The noise reduction component (4) comprises a sound absorbing component (41), an air inlet component (42) and a support component (43); the sound absorbing component (41) comprises a front end cover (411), a rear end cover (412) and a sound absorbing cotton cylinder (413) arranged between (411) and (412); The air inlet assembly (42) comprises an air induction cover (421) and a sealing ring (422) connected to the outer edge of the air induction cover (421); the air induction cover (421) is a conical structure, and the air induction cover (421) is connected to the front end cover (411); The support assembly (43) comprises a plurality of guide rails (432) and a sliding support rod (433) slidably arranged in the guide rails (432).

2. A central air conditioner outlet duct noise reduction device according to claim 1, Features: The front end cover (411) and the rear end cover (412) are both provided with inner grooves on their opposite sides, and a metal mesh tube (414) is sleeved on the outer surface of the sound-absorbing cotton tube (413), and the two ends of the sound-absorbing cotton tube (413) and the metal mesh tube (414) are respectively clamped in the corresponding inner grooves of the front end cover (411) and the rear end cover (412).

3. A central air-conditioning outlet duct noise reduction device according to claim 1, Features: The diameter of the sealing ring (422) is the same as the diameter of the flange ring (3), and a plurality of flange bolts are cooperatively provided on the sealing ring (422) and the flange ring (3).

4. A central air-conditioning outlet duct noise reduction device according to claim 1, Features: The support assembly (43) further comprises a center disk (431), and the center disk (431) is fixedly connected to the rear end cover (412), and a plurality of guide rails (432) are installed in a circular array on the center disk (431).

5. A central air-conditioning outlet duct noise reduction device according to claim 1, Features: The end of the sliding support rod (433) is also connected to a rubber block (434), and a positioning bolt (435) is provided on the sliding support rod (433) and the guide rail (432).

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