CN220102464U - HVAC airflow muffler - Google Patents

Abstract

The utility model discloses a heating and ventilation airflow muffler, which includes: a round tube, a silencing structure is installed inside the round tube, and a shock-absorbing structure is installed on the outer wall of the round tube. The silencing structure includes: a silencing cavity, a first silencing material, and a second silencing material. material, center board and several partitions. The utility model relates to the technical field of HVAC accessory equipment. The beneficial effects of this case are: using a silencing structure and a shock-absorbing structure, the air flow advances along the gap formed by the special arrangement of the partitions and is blocked. It will lose its own transmission energy, weaken the noise, and complete the silencing work. At the same time, when the vibration inside the round tube is transmitted to the surface, it will be absorbed by the splint, and then reduced by the spring, thereby reducing the impact of vibration on the equipment and extending the life of the equipment. It solves the problem that when the prior art equipment is working, the airflow flowing inside the equipment will vibrate when encountering resistance, which will loosen parts of the equipment over time and reduce the service life of the equipment. It has some beneficial effects.

Description

HVAC airflow muffler

Technical field

The utility model relates to the technical field of HVAC accessory equipment, specifically an HVAC airflow muffler.

Background technique

Mufflers refer to airflow pipes that also have noise propagation. Noise reduction devices such as pipes and elbows with sound-absorbing linings or pipes that use sudden changes in cross-sectional area and other discontinuous acoustic impedance can be used to attenuate or reduce the noise in the pipe. Reflected back, the former is called a resistive muffler, the latter is called a resistance muffler, and there are also impedance composite mufflers. There is an HVAC airflow noise reduction device with the publication number CN212203569U, which includes ventilation ducts and is installed in The side panels at both ends of the ventilation duct and the installation holes evenly installed on the side panels. The inner wall of the ventilation duct is equipped with a sound insulation layer. The inner wall of the sound insulation layer is equipped with a middle partition pipe. The inner wall of the middle partition pipe is equipped with foam. The inner wall of the intermediate pipe is evenly provided with reflection grooves. The advantage is that when the wind blown by the large ventilator enters the inside of the ventilation pipe, because the foam pipe has a porous structure and has a good sound absorption effect, a small part of the noise can be transmitted through After passing through the foam tube, it is transmitted to the evenly arranged reflection groove. Since the inner wall of the reflection groove has an arc-shaped structure, the noise will form diffuse reflection in the reflection groove, and finally consume the transmission energy of the noise itself and weaken the noise. Sound insulation board It has a good sound isolation effect and can effectively prevent the noise from propagating to the outside, thereby effectively reducing the sound of the noise passing out. However, when the equipment is working, the airflow flowing inside it will cause vibration when encountering resistance, which will cause the equipment to vibrate over time. Some parts are loose, reducing the service life of the equipment.

Utility model content

In order to achieve the above objectives, the present utility model is realized through the following technical solutions: a HVAC airflow muffler, including: a round tube, a silencing structure is installed inside the round tube, and a shock-absorbing structure is installed on the outer wall of the round tube;

The silencing structure includes: silencing cavity, first silencing material, second silencing material, center plate and several partitions;

The silencing cavity is opened inside the circular tube. The first silencing material is installed on the wall of the silencing cavity. The second silencing material is installed on the inner wall of the first silencing material. The center plate is installed in the center of the silencing cavity. Several partitions are installed on the center plate and the second silencing cavity. on sound deadening material.

Preferably, some of the partitions are installed on the second sound-absorbing material and some of the partitions are installed on the center plate in a staggered manner.

Preferably, the spacing between several partitions is the same.

Preferably, the shock-absorbing structure includes: a pair of splints, a number of limiting grooves, a pair of bolts, a pair of limiting rods, a number of springs, a pair of fixed plates and a pair of rings;

A pair of splints are installed on the upper and lower sides of the round pipe, a number of limit grooves are opened on the left and right sides of the pair of plywood, a pair of bolts are installed on the left and right sides of the pair of plywood, a pair of limit rods are installed in a number of limit grooves, and several The spring is wound around both sides of the outer walls of a pair of limiting rods, a pair of fixed plates are installed at both ends of the pair of limiting rods, and a pair of rings are installed at both ends of the inner sides of the pair of fixed plates.

Preferably, the pair of rings are left and right symmetrical along the vertical center of the fixed plate.

Preferably, the spring force coefficient is 15N.

beneficial effects

The utility model provides an HVAC airflow muffler, which has the following beneficial effects: using a silencing structure and a shock-absorbing structure, the first silencing material and the second silencing material partially reduce the noise, effectively preventing the noise from spreading outward, and the airflow forward Go to the partition and advance along the gap formed by the special arrangement of the partition. If blocked, it will lose its own transmission energy, weaken the noise, and complete the silencing work. At the same time, when the vibration inside the circular tube is transmitted to the surface, it will be absorbed by the splint. The springs then reduce it, thereby reducing the impact of vibration on the equipment, extending the life of the equipment, and solving the problem that when the existing technical equipment is working, the air flow flowing inside it will cause vibration when encountering resistance, which will cause parts of the equipment to loosen over time. , reducing the service life of the equipment.

Description of the drawings

Figure 1 is a schematic structural diagram of an HVAC airflow muffler according to the utility model;

Figure 2 is a schematic side structural view of an HVAC airflow muffler according to the present utility model;

Figure 3 is a schematic structural diagram of point A of an HVAC airflow muffler according to the present utility model.

In the picture: 1-round tube; 2-muffler cavity; 3-first muffler material; 4-second muffler material; 5-center plate; 6-partition plate; 7-plywood; 8-limit groove; 9-bolt ; 10-limiting rod; 11-spring; 12-fixing plate; 13-ring.

Detailed ways

Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

Embodiment: Please refer to Figure 1-3. The main components of this case are: round tube 1. A silencing structure is installed inside the round tube 1, and a shock-absorbing structure is installed on the outer wall of the round tube;

The silencing structure includes: silencing cavity 2, first silencing material 3, second silencing material 4, center plate 5 and several partitions 6;

The silencing chamber 2 is opened inside the circular tube 1, the first silencing material 3 is installed on the wall of the silencing chamber 2, the second silencing material 4 is installed on the inner wall of the first silencing material 3, the center plate 5 is installed in the center of the silencing chamber 4, and several partitions 6 are respectively installed on the center plate 5 and the second sound-absorbing material 4. Several partition plates 6, of which the partition plates 6 are installed on the second sound-absorbing material 4, are staggered with several partition plates 6, of which the partition plates 6 are installed on the upper part of the center plate 5. , the spacing between several partitions 6 is the same.

It should be noted that when the airflow enters the silencing cavity 2 in the round tube 1, the noise is partially attenuated by the first silencing material 3 and the second silencing material 4, effectively preventing the noise from propagating outward, and the airflow moves forward to the partition 5 , advancing along the gap formed by the special arrangement of the partition 5, if blocked, it will lose its own transmission energy, weaken the noise, and complete the silencing work.

In the specific implementation process, further, the shock-absorbing structure includes: a pair of clamping plates 7, a plurality of limiting grooves 8, a pair of bolts 9, a pair of limiting rods 10, a plurality of springs 11, a pair of fixed plates 12 and a pair of ring 13;

A pair of splints 7 are installed on the upper and lower sides of the round tube 1, a number of limit slots 8 are opened on the left and right sides of the pair of splints 7, a pair of bolts 9 are installed on the left and right sides of the pair of splints 7, and a pair of limit rods 10 are installed on the left and right sides of the pair of splints 7. In a plurality of limiting grooves 8, a plurality of springs 11 are wound on both sides of the outer walls of a pair of limiting rods 10, a pair of fixed plates 12 are installed at both ends of a pair of limiting rods 10, and a pair of rings 13 are installed on a pair of fixed plates 12 At both inner ends, a pair of rings 13 are left and right symmetrical along the vertical center of the fixed plate 12, and the elastic coefficient of the spring 11 is 15N.

It should be noted that a pair of splints 7 frictionally fix the round tube 1. When the vibration inside the round tube 1 is transmitted to the surface, it will be absorbed by the splints 7. At this time, since the splint 7 is restricted by the movement of the limiting rod 10, the It converts the vibration force into the force of up and down movement, and at the same time reduces it by the spring 11, thereby reducing the impact of vibration on the equipment and extending the life of the equipment.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. , substitutions and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. An HVAC airflow muffler, including: a round tube, characterized in that a silencer structure is installed inside the round tube, and a shock-absorbing structure is installed on the outer wall of the round tube; The silencing structure includes: silencing cavity, first silencing material, second silencing material, center plate and several partitions; The silencing cavity is opened inside the circular tube. The first silencing material is installed on the wall of the silencing cavity. The second silencing material is installed on the inner wall of the first silencing material. The center plate is installed in the center of the silencing cavity. Several partitions are installed on the center plate and the second silencing cavity. on sound deadening material. 2. A HVAC airflow muffler according to claim 1, characterized in that, of the plurality of partitions, some of the partitions are installed on the second sound-absorbing material and some of the plurality of partitions are installed on the center plate in a staggered manner. 3. A HVAC airflow muffler according to claim 1, characterized in that the spacing between several partitions is the same. 4. A HVAC airflow muffler according to claim 1, characterized in that the shock-absorbing structure includes: a pair of splints, a number of limiting slots, a pair of bolts, a pair of limiting rods, a number of springs, a pair of Fixed plate and a pair of rings; A pair of splints are installed on the upper and lower sides of the round pipe, a number of limit grooves are opened on the left and right sides of the pair of plywood, a pair of bolts are installed on the left and right sides of the pair of plywood, a pair of limit rods are installed in a number of limit grooves, and several The spring is wound around both sides of the outer walls of a pair of limiting rods, a pair of fixed plates are installed at both ends of the pair of limiting rods, and a pair of rings are installed at both ends of the inner sides of the pair of fixed plates. 5. A HVAC airflow muffler according to claim 4, characterized in that a pair of rings are left and right symmetrical along the vertical center of the fixed plate. 6. A HVAC airflow muffler according to claim 4, characterized in that the spring elastic coefficient is 15N.