After installing the duct machine for a period of time, it is found that the noise is getting louder

Duct machine. As with the air conditioner, there is a distinction between the internal unit and the external unit, when the external unit is outside, it is the first noise of the first unit, even if it is a split air conditioner.

There is also a lot of noise. The noise of the indoor unit mainly comes from the air outlet and the internal unit, compared with the ordinary split air conditioner, the internal unit of the air duct machine is usually hidden in the inner roof, and it is generally closed and soundproofed. The noise of the air duct machine is usually not as loud as that of the split air conditioner, but if the closed sound insulation is not done well, it will also produce a relatively large sound insulation.

The principle of the air duct machine is not much different from the split air conditioner, and the structure is roughly the same, if you want the air duct to play a normal role, you need to pay attention to whether the operation of the equipment is reliable and whether the future maintenance is convenient when installing. The air duct machine may affect the user's use effect in the process of installation, and affect whether the system can run for a long time, the decoration of each family is different, and there will be different requirements for the installation of air conditioning, so it is necessary for the user to communicate with the construction personnel in a timely manner. <>

The noise of the duct machine mainly comes from the centrifugal fan.

The disturbing noise generated by centrifugal fans can also be divided into discrete frequency noise and broadband noise. If you want to reduce noise without changing the structure of the duct, you can solve this problem to a certain extent by reducing the speed of the fan. At the same time, people can also connect the air duct before and after the air duct machine, and the indoor noise can also be well reduced by setting the air duct elbow, mainly through the characteristics of the material to achieve the effect of sound reduction.

Many manufacturers will adopt noise reduction measures when installing air duct machines, and they can choose the most advanced transverse scroll compressor, and they need to purchase a sound insulation cover. If the user has the conditions, you can also use the ceiling return air, the air duct machine try not to use the lower return air, you can choose the rear return air. A layer of sound-absorbing material can be pasted on the surface of the wall opposite the air inlet of the air duct machine, which can further absorb noise, which will make people's lives more comfortable and achieve a good quality of life.

It may be that the ceiling return air, the capacitor is too small, and the front and rear air connection pipes are not set up, which will cause the noise to become louder and louder.

It may be caused by the centrifugal fan, or because the installation is not in place, and it should be inspected and repaired.

It is very likely that there is a problem with the installation method, or it is possible that there is a gap between the front and rear air ducts, which is not firmly glued.

If it is found that the operation of the air duct is too loud, it may be because the internal compressor parts have been aged and worn, and the screws may also be loose, so the user needs to check it in time. If the voltage of the air duct is in a low position for a long time, but the compressor uses high current for a long time, it will affect the life of the compressor, and at the same time, it will also make the operation of the air duct too loud, so the user needs to be equipped with a more stable power supply in time to make the air duct machine run normally, and at the same time can bring people a better quality of life. <>

If you want to reduce the noise of the air duct machine, then you can choose the ceiling return air method, which means that the entire ceiling where the air duct machine is located needs to be used as a return air box. The air duct machine does not use the lower return air, but can use the rear return air, and the sound insulation device can be made on the wall opposite the air outlet of the air duct machine. It is usually used on the market to make a sound-absorbing material on the wall, with a thickness of about 10 20 mm, which can absorb or reduce noise.

In the process of air return, the ceiling can keep the louver return air outlet away from the air inlet of the air duct machine. <>

If the indoor unit of the duct machine is in the middle of the ceiling of the room, then the return air outlets can be placed on both sides of the ceiling. People can also connect the air duct before and after the air duct machine, and at the same time, the air duct elbow can be set up if the conditions permit. The noise emitted by the air duct machine will be refracted and absorbed through the elbow, so that the noise will reach people's ears and be significantly reduced.

The air duct usually uses the air duct with sound absorption function, which requires the user to go to the market in time to do a good job, and can not buy some fake and shoddy products, otherwise it will not achieve good results. <>

People can also add a baffle at the return air outlet of the air duct machine, or set up a return air duct with an opening upward, which can also effectively prevent the sound from continuously spreading downward, and can further reduce the noise from the return air outlet. When people are decorating, they must leave enough space between the indoor unit and the wall and ceiling, so that when there is a problem, they can take corresponding measures to improve the situation in time. If people have a larger space, then you can also try multi-connection, which is a little less noisy than the duct machine.

You can install some noise removal equipment, you can also choose the first air conditioner, you can also reduce the frequency of use of the air duct machine, you can also control the power when you use it, and you can also adjust the frequency.

Of course, there is a way, pay attention to the way of installation, the installation is not particularly flat, this situation will occur, so that the noise can be well reduced.

I think that the method of ceiling return air can be adopted, which can effectively reduce the noise, and does not affect the aesthetics, can have a certain absorption effect on the noise, and is more convenient to install.

1. The fresh air outdoor unit is too close to the bedroom The fresh air host is the main noise source of the fresh air fan, and the rotating sound of the fan motor and the airflow sound are superimposed together, which will produce a certain amount of noise. The closer the main unit is to the bedroom, the louder it is.

Second, the equipment is not installed with shock absorbers, and the fresh air is not pasted with silencing cotton, and the glass soundproof cotton is not isolated under the host, and the sound-absorbing material is not installed, resulting in loud noise.

3. The static pressure box of air distribution is not installed, resulting in uneven air volume diversion, uneven air outlet, large wind speed and high noise at the tuyere.

Fourth, the use of silencer pipes, hoses during the installation of the use of silencer pipes, hoses, resulting in noise can not be absorbed, slowed down, Rolet silencer pipe has sound-absorbing materials in the noise reduction, the use of hoses can slow down the impact of the host vibration on the pipeline.

Fifth, the construction quality of the installation team is not high The credibility of the construction team is low, the construction is not rigorous, the design is unreasonable, and the fixation is not firm, which leads to the use of noise.

One of the noise sources of the fresh air system is the main engine, because the motor in the main engine will produce noise when it is running, and when the wind speed reaches a certain height, it will also produce noise

It doesn't matter if you use it for a long time, it may be the reason for the new machine.

The reasons and solutions for the high noise of the new fan are as follows:

1. The noise of the main engine is partly the noise of the motor operation, and the partly is the noise generated when the wind flows at high speed. In fact, as long as Sisen chooses a good brand and a high-quality motor, the noise of the host operation is basically not to worry, and the ceiling can also block part of the sound, and the professional fresh air system design engineer will try to shorten the distance between the host and the quiet area.

2. Tuyere noise, tuyere noise is also wind noise, wind noise is a more contradictory thing, products with low noise are not necessarily good, because under the same conditions, the smaller the noise Lu Yuyin proves that its air volume is smaller, that is, the air volume is insufficient or the air leakage rate is high.

Dust sticks to the blades, making the impeller unbalanced, or the two bearings inside the transmission are broken!

Two reasons for the first need for lubricating oil between the gears.

Second, there is a lot of dust in the equipment to block the air outlet.

There is too much dust in it or the parts are badly worn.

1) The noise is high, it is the fault of the motor bearing, which can be eliminated after replacement;

2) The motor is heated, and the motor has a certain temperature rise during normal operation, as long as the current is normal and the temperature rise is lower than 80 degrees, it is a normal range.

Fan coil unit is the ideal end product of air conditioning, fan coil unit is widely used in hotels, office buildings, hospitals, commercial and residential, scientific research institutions. The fan cools or heats the indoor air or outdoor mixed air through the surface cooler and sends it into the room, so that the indoor air temperature is lowered or increased to meet people's comfort requirements.

--- ancient times, due to the limitations of science and technology, people could not easily regulate the indoor temperature, so they suffered from severe cold and heat. With the change of the times and the development of science and technology, people can now easily realize indoor temperature control, and the equipment that helps people realize indoor temperature control is the fan coil unit. According to the majority of users, the fan panel control has a good cooling and heating effect, which can create a comfortable indoor environment, but the fly in the ointment is that it will make relatively large noise when working.

What is the cause of this problem? What can users do to reduce noise? It is understood that due to the limitation of the current technical level, the actual noise level of various fan coil units at home and abroad is generally high, and the domestic fan coil units have reached the international level in terms of noise treatment.

In this case, Baoxin believes that the main reasons for the excessive noise of the fan coil unit are as follows: The noise level of the indoor fan coil unit varies from high to low due to the different installation positions and configuration methods of the fan coil unit. According to the test of the fan coil unit at different installation sites, when the fan coil unit is turned on at a high speed, the upper limit of the noise field is NC-45, and the lower limit is NC-35; When the fan coil unit is turned on at a low speed, the upper limit is NC-40 and the lower limit is NC-25.

In view of the above reasons for the excessive noise of indoor fan coil unit, Baoxin recommends that users adopt the following countermeasures:

When selecting the fan coil unit, the user should consider the installation position of the fan coil unit according to the level of quietness required by the room. When installing in the bedroom with high requirements for quietness, the air duct between the outlet of the fan coil unit and the air supply outlet of the room can be muffled, and the column fan coil unit should be installed away from the bed and table, and the muffler device can also be added to the air outlet; For those who require a general level of quietness, a horizontal or vertical fan coil unit with a medium noise level can be selected. Excessive noise can affect the mood of users and even harm their health.

Baoxin provides customers with countermeasures to the problem of excessive noise of fan coil units, hoping to reduce the trouble caused by noise to the majority of users, so that users can enjoy a comfortable indoor environment with a pleasant mood and enjoy the convenience brought by high-tech achievements.

<><How to solve the problem that the duct fan is too noisy

For fan noise reduction, it is generally recommended to use mufflers, of course, it is only one of the methods in the feast. Fan noise is not only airborne noise, but also other types of noise, so many fans will use sound insulation covers or sound barriers to reduce noise, and mufflers are also necessary to use in them.

Duct fan product features

1. The control parameters of the pipeline fan are air volume, efficiency and noise.

2. According to the physical and chemical properties of the gas to be transferred, fans with different functions are adopted. For example, to transmit clean air, ordinary ventilators are used. To transmit flammable and explosive substances, a silver explosion-proof fan should be used. To transmit corrosive gases, corrosion-resistant fans should be used.

3. In the process of fan selection, it is necessary to consider the air leakage loss, calculation error and the specific air volume and negative deviation of the wind pressure of the fan. However, do not use too much to avoid the fan working in a low-efficiency area for a long time.

Key points for duct fan installation

1. The ventilator placement pedestal should have sufficient strength, stability and durability, and the vibration of the pedestal should meet the following requirements:

1. The natural frequency of the basic equipment shall not exceed one-third of the speed of the motor and the ventilator.

2. The difference between the vibration rate during the operation of the fan and the vibration rate when the fan is stationary is more than three times.

2. The inlet and outlet of the ventilator should be connected with the middle of the wind and the shirt pipe, and flexible joints should be set. The inlet and outlet air ducts and other equipment should be independently supported, and firmly supported by the foundation or other components of the building, and the casing should not bear the weight of other parts.

3. When the ventilator is placed in the building components, the vibration isolation method should be adopted.

Fourth, the pipeline fan can be placed in the straight air duct, which has the advantages of convenient connection and small space occupation.

The problem of excessive noise of duct fans can be solved by the following methods:

1.Acoustic enclosures and acoustic enclosures: Installing acoustic enclosures or acoustic enclosures can contain noise inside the enclosures and reduce the transmission of noise. These covers typically use soundproofing materials to absorb and isolate noise.

2.Sound-absorbing materials: The use of sound-absorbing materials around the duct fan, such as sound-absorbing panels, sound-absorbing cotton, etc., can effectively reduce the reflection and propagation of noise.

3.Vibration damping measures: Installing vibration damping pads, vibration damping hangers, etc., can reduce the noise generated by mechanical vibration.

4.Fan balancing and maintenance: Regularly carry out the balancing and maintenance of the fan to ensure that its operation is smooth and reduce unnecessary vibration and noise.

5.Air Duct Optimization: Reduce turbulence and noise generation in the airflow by optimizing the design and layout of the air duct.

6.Inverter control: Using an inverter to control the speed of the fan can reduce the noise level generated by the fan.

7.Keep away from sensitive areas: Keep duct fans away from sensitive areas to reduce the impact of noise on people.

8.Regular inspection and monitoring: Establish a noise monitoring system to regularly detect the noise level of pipeline fans, detect abnormalities in time and take measures.

9.Regulatory Compliance: Comply with local and national noise emission regulations to ensure that the noise level of duct fans is within the specified range.

10.Technology upgrades: Consider advanced noise control technologies, such as sonic cancellation, to reduce noise levels.

The comprehensive use of the above methods can effectively reduce the noise of the pipe fan, improve the working environment and reduce the impact on the surrounding environment.