CN205331629U - Energy -conserving tuber pipe of making an uproar falls - Google Patents

Abstract

The utility model discloses an energy -conserving tuber pipe of making an uproar falls belongs to ventilation air conditioning equipment technical field. The technical scheme who adopts does: the pipe wall ab intra of this energy -conservation tuber pipe outwards forms by inner panel surface course, sound absorbing layer, heat preservation and planking surface course are fixed in proper order, wherein, the sound absorbing layer is made by foamed aluminum plate, the heat preservation is made by the aerogel felt. The utility model discloses a foamed aluminium has replaced glass fiber and the phenolic foam among traditional composite air pipe for the sound absorbing material, has reduced glass fiber's use, harm that the use that has reduced glass fiber composite air pipe brought for the health to avoid phenolic foam's use, given harm human and that the environment brings. Need not carry out on -the -spot heat -insulation construction during the construction, consequently the unnecessary construction space that reserves to the space that can sparingly install reduces the floor height of constructing. The utility model has the advantages of the sound absorption is fallen and is made an uproar, and the fire prevention keeps warm the environmental protection, accord with the development trend of tuber pipe, but at air conditioner field widely used.

Description

A noise-reducing energy-saving air duct

technical field

The utility model belongs to the technical field of ventilation and air-conditioning equipment, in particular to a noise reduction and energy saving air duct.

Background technique

With the development of society and the improvement of people's living standards, people's requirements for living comfort are getting higher and higher, and ventilation and air conditioning projects are becoming more and more important in the field of construction engineering. In ventilation and air-conditioning projects, in addition to comfort, the low-noise operation of the system is also one of the important indicators to measure the quality of ventilation and air-conditioning projects. In particular, offices such as libraries, conference rooms, and broadcasting rooms have stricter noise requirements for ventilation and air conditioning. In the increasingly competitive air conditioner market, high quality, excellent performance and low noise have become the development trend.

The ventilation duct system is used in the fields of air conditioning, industrial ventilation, dust removal, and pneumatic conveying. It is widely used in the air supply, exhaust, and smoke exhaust ducts of civil air defense, basement and other projects, especially in areas that require fire protection in buildings. There are two main reasons for the noise of ventilation and air-conditioning pipelines: one is that the noise generated by the operation of fans and air-conditioning units is transmitted into the room through the air duct; the other is that the air flow flows in the air duct. Therefore, to reduce the noise of the ventilation and air conditioning system, it is mainly to reduce the noise of the fan and air conditioning unit and the noise of the air duct. There are two commonly used methods to control and reduce the noise of ventilation and air conditioning systems: one is to install noise reduction equipment on the air duct. However, in actual operation, the working effect of the muffler is greatly affected by the wind speed. If the wind speed is too high when the system is working, the number of gas cycles will increase, and the muffler will not have time to silence the noise, and the circulating noise will already be generated, and the noise reduction effect will be weakened. Seriously Sometimes it will even affect the work of the muffler, so that this method of controlling and reducing noise has certain limitations. The other is to use a sound-absorbing air duct. Currently, the commonly used sound-absorbing air ducts on the market are glass fiber composite air ducts and phenolic composite air ducts. However, glass fiber composite air ducts and phenolic composite air ducts have many shortcomings, such as glass fiber composite air ducts. The glass fiber on the inner wall of the pipe is easy to fall off, and a large amount of dust will be generated, which will enter the room with the wind and cause serious damage to human health. Moreover, the glass fiber composite air duct has low flame retardancy, mildew resistance and moisture resistance, and the settlement phenomenon is caused by moisture and mold, and the damage of glass wool will cause a serious decline in sound absorption performance. The operating temperature of phenolic foam in phenolic composite air duct is -60°C to 150°C, so when the temperature exceeds 200°C, CO gas will be generated, which will cause harm to the human body; in addition, phenol and formaldehyde will be used in the production process of phenolic foam, The production of phenol and formaldehyde are high pollutants. Phenolic resin contains free aldehydes and free phenols, which are harmful to the human body and the environment.

Utility model content

In order to overcome the above-mentioned defects in the prior art, the purpose of this utility model is to provide a noise-reduction and energy-saving air duct with functions of noise reduction, heat preservation, fire prevention and moisture resistance.

The utility model is realized through the following technical solutions:

A noise-reducing energy-saving air duct, the pipe wall of the energy-saving air duct is sequentially fixed from the inside to the outside by an inner panel surface layer, a sound-absorbing layer, a thermal insulation layer and an outer panel surface layer; wherein, the sound-absorbing layer is made of foamed aluminum plates; The layers are made of airgel felt.

The surface layer of the inner panel, the sound-absorbing layer, the thermal insulation layer and the surface layer of the outer panel are bonded by a fireproof adhesive.

The inner panel surface layer is made of aluminum foil.

The surface layer of the outer plate is made of color steel plate.

The resonant frequency of the aluminum foam board is 4000 Hz, the porosity is greater than 90%, the aperture is 3-7mm, and the thickness is 20-40mm.

The density of the aluminum foam board is 0.2-1.2g/cm ³ , the attraction coefficient is 0.8-1.0, and the thermal conductivity is 0.3-1W/m ² ·k.

The thermal conductivity of the airgel blanket at 25°C is <0.018W/m ² ·k.

Compared with the prior art, the utility model has the following beneficial technical effects:

The pipe wall of the noise-reducing and energy-saving air duct disclosed by the utility model is sequentially fixed into one body by an inner plate surface layer, a sound-absorbing layer, a thermal insulation layer and an outer plate surface layer from the inside to the outside. Among them, the sound-absorbing layer is made of aluminum foam; the heat-insulating layer is made of airgel felt. First, the glass fiber and phenolic foam in the traditional composite air duct are replaced by aluminum foam board, which reduces the use of glass fiber, reduces the damage to human health caused by the use of glass fiber composite air duct, and avoids the damage of phenolic foam. Use, harm to the human body and the environment. Second, due to the large number of pores in the foamed aluminum plate, after the sound wave enters the foamed aluminum plate, on the one hand, multiple reflections occur inside the pores, and part of the sound energy is consumed due to the mutual interference between the incident sound wave and the reflected sound wave; on the other hand, due to the pores The compression and stretching deformation of the inner medium under the sound wave causes the friction between the medium and the hole wall, so that part of the sound energy is converted into heat energy and consumed; moreover, the vibration of the metal matrix caused by the sound wave also consumes part of the sound energy. Therefore, the air duct has good sound absorption capacity. When the ventilation and air conditioning system is running, most of the noise generated by the fan and air conditioning unit to the air duct and the airflow flowing in the air duct is absorbed by the noise reduction duct. The air duct itself is a pipe muffler, so there is no need to set muffler accessories such as muffler covers and muffler elbows. Third, the airgel felt for the insulation layer is a flexible insulation felt made of silica airgel as the main material, which is compounded with glass fiber cotton or pre-oxidized fiber felt. Its thermal conductivity is 3 to 8 times that of traditional materials. The heat insulation effect is good, the thickness of the required heat insulation layer is only a fraction of that of traditional materials, and the service life is as long as 20 years.

Further, since the density of the foamed aluminum plate of the sound-absorbing layer is 0.2-1.2g/cm ³ , the strength can reach several MPa orders of magnitude, it is non-toxic and has zero moisture absorption rate; the airgel felt of the insulation layer is absolutely hydrophobic, and the water-repellent rate is ≥99.5% . Therefore, this noise-reducing air duct is non-toxic, and has the characteristics of energy saving, light weight, moisture resistance and stable structure.

Furthermore, the surface layer of the inner plate is made of aluminum foil, which ensures the hygiene of the conveying medium and avoids secondary pollution, and the inner layer has no condensed water and no rust.

Description of drawings

Fig. 1 is a structural schematic diagram of the noise-reduction and energy-saving air duct of the present utility model;

Fig. 2 is a cross-sectional view of the wall of the noise reduction air duct of the present invention.

Among them: 1 is the surface layer of the inner panel; 2 is the sound-absorbing layer; 3 is the insulation layer; 4 is the surface layer of the outer panel.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to Fig. 1 and Fig. 2, the noise-reducing energy-saving air duct of the present utility model, the pipe wall of the energy-saving air duct passes through the fireproofing layer from the inside to the outside sequentially from the inner panel surface layer 1, the sound-absorbing layer 2, the insulation layer 3 and the outer panel surface layer 4. It is bonded and fixed with an adhesive; wherein, the sound-absorbing layer 2 is made of foamed aluminum board; and the heat-insulating layer 3 is made of airgel felt. The inner panel surface layer 1 is made of aluminum foil, and the outer panel surface layer 4 is made of color steel plate.

The sound-absorbing layer 2 is made of foamed aluminum plate with a resonant frequency of 4000Hz, a pore diameter of 3-7mm, a porosity greater than 90%, a thickness of 20-40mm, and an attraction coefficient of 0.8-1.0. It mainly plays the role of sound absorption.

The thermal insulation layer 3 is an airgel felt, which has a thermal conductivity <0.018W/(m ² ·k) in an environment of 25°C, and mainly plays a role of thermal insulation.

The main advantages of the noise-reducing and energy-saving air duct of the utility model are as follows:

(1) Sound absorption and noise reduction performance

Since the foam aluminum plate in the middle contains a large number of pores, after the sound wave enters the foam metal, on the one hand, multiple reflections occur inside the hole, and part of the sound energy is consumed due to the mutual interference between the incident sound wave and the reflected sound wave; on the other hand, due to the medium in the hole The compression and stretching deformation of the sound wave causes the friction between the medium and the hole wall, so that part of the sound energy is converted into heat energy and consumed; moreover, the vibration of the metal matrix caused by the sound wave also consumes part of the sound energy. Its resonance frequency is 4000Hz, the aperture is 3-7mm, the porosity is 90%, the thickness is 30mm, and the attraction coefficient is about 0.9. Therefore, this air duct has good sound absorption capacity. When the ventilation and air conditioning system is running, most of the noise generated by the fan and air conditioning unit to the air duct and the airflow flowing in the air duct is absorbed by the noise reduction duct. The device itself is a pipe muffler, and no muffler fittings such as muffler covers and muffler elbows need to be set.

(2) Fire performance

This noise-reducing air duct is composed of aluminum foil on the surface of the inner panel, aluminum foam on the sound-absorbing layer, airgel felt as the insulation layer, and high-temperature baking-painted color steel plate on the outer layer bonded by fire-resistant adhesives. The fire-resistant temperature of foamed aluminum can reach 800 ℃, the service temperature of airgel felt is -200～1000 ℃, and the fire rating is A1, while the service temperature of glass fiber composite air duct is up to 121 ℃, and the service temperature of phenolic composite air duct is -60 ℃～150 ℃. Compared with the traditional air duct, the utility model has better fireproof performance.

(3) Insulation performance

The thermal insulation layer is airgel felt, whose thermal conductivity is <0.018W/(m ² ·k) at 25°C, which is 3 to 8 times that of traditional materials; to achieve the same thermal insulation effect, the required thickness of the thermal insulation layer is only A fraction of traditional materials, and the service life is as long as 20 years; and the sound-absorbing layer foam aluminum also has good heat insulation performance, the thermal conductivity of foam aluminum is only 0.3 ~ 1W/(m ² k), which increases the Compared with the traditional air duct, the overall heat insulation performance of the air duct has better heat preservation performance, which further reduces the heat loss of the airflow in the air duct during the flow process, and is energy-saving and environmentally friendly.

(4) Since the density of foam aluminum in the sound-absorbing layer is 0.2-1.2g/cm ³ , the strength can reach several MPa orders of magnitude, it is non-toxic and has zero moisture absorption rate; the airgel felt of the insulation layer is absolutely hydrophobic, and the water-repellent rate is ≥99.5% . Therefore, this noise-reducing air duct has the characteristics of non-toxicity, energy saving, light weight, moisture-proof and stable structure.

(5) Moreover, the sound-absorbing material of the utility model replaces the glass fiber and phenolic foam in the traditional composite air duct with aluminum foam, which reduces the use of glass fiber and reduces the damage to human health caused by the use of glass fiber composite air duct , and avoid the use of phenolic foam, the harm to the human body and the environment.

(6) On-site insulation construction is not required during construction of the utility model, so there is no need to reserve construction space, thereby saving installation space and reducing the floor height of the building.

Claims (5)

1. a noise-reduction energy-saving airduct, it is characterised in that the tube wall of this energy-conservation airduct is formed by inner panel surface layer (1), sound absorbing layer (2), heat-insulation layer (3) and outside plate surface layer (4) are fixing from inside to outside successively；Wherein, sound absorbing layer (2) is made up of foamed aluminium board；Heat-insulation layer (3) is made up of aerogel blanket。

2. noise-reduction energy-saving airduct according to claim 1, it is characterised in that inner panel surface layer (1), sound absorbing layer (2), heat-insulation layer (3) and outside plate surface layer (4) are formed by fireproof bonding agent bonding。

3. noise-reduction energy-saving airduct according to claim 1, it is characterised in that described inner panel surface layer (1) is made up of aluminium foil。

4. noise-reduction energy-saving airduct according to claim 1, it is characterised in that described outside plate surface layer (4) is made up of color steel。

5. noise-reduction energy-saving airduct according to claim 1, it is characterised in that the porosity of described foamed aluminium board is more than 90%, and aperture is 3～7mm, and thickness is 20～40mm。