Measures for noise control of exhaust fans

The mechanical noise of the exhaust fan and the flue gas generated by the iron sheet have a large impact sound, so the exhaust fan will generate a lot of noise when it is running, which greatly affects the living environment and physical and mental health of the surrounding residents. Environmental protection agencies in many areas often receive complaints from residents about noise pollution caused by similar exhaust fans. When using the exhaust fan, the canteen and the restaurant should also take measures to reduce the noise and the relevant measures that can be taken when the exhaust fan is treated.

Canteens, restaurants, restaurants, etc. are equipped with exhaust fans, but many of these places are equipped with exhaust fans, and many are not equipped with sound insulation, and many exhaust fans use metal devices. The mechanical noise of the exhaust fan and the flue airflow made of iron are very loud, so when the exhaust fan is operated, it will generate a lot of noise, which greatly affects the living environment and physical and mental health of the surrounding residents. Environmental protection departments in many areas often receive complaints about noise pollution caused by similar exhaust fans. Canteens and restaurants should take measures to reduce noise when using exhaust fans. Relevant measures that can be taken when exhaust fan noise management are:

1. Adopt sound insulation and noise reduction measures to block the transmission of noise, that is, install three soundproof covers on the outer windows of the three exhaust fans.

2. The sound insulation cover is detachable and equipped with an access door for maintenance.

3. Noise control adopts sound absorption and noise reduction measures: the sound absorption material is wrapped outside the iron flue, and the galvanized color steel plate is used as a protective layer to reduce the radiation of solid sound through the flue to the outside, and a muffler is installed to eliminate the air flow. noise.

4. Noise control A common method for controlling fan noise is to install a resistive muffler at the inlet and outlet of the fan. For applications with higher noise reduction requirements, a sound insulation sound box can be used and a shock absorber can be placed between the unit and the foundation.

5. Install the sound insulation cover. The fan noise propagates not only along the airflow of the pipeline, but also radiates noise through the ducts of the casing. At the same time, the mechanical noise and electromagnetic noise of the fan unit also propagate outward, polluting the surrounding environment. When the environmental noise standard is high, the noise can not be effectively controlled by only the muffler. The noise control scheme must be considered comprehensively. The most effective measure is to design and install the sound insulation cover of the fan unit.

After adopting the above noise control method, a significant noise reduction effect is generally obtained. Before noise management of the fan, it is necessary to know in detail the noise status of the fan and the unit. This includes checking data or actual measurements and analyzing the noise spectrum. The noise of the fan is related to the structure, model, air volume and wind pressure of the fan. According to the noise of the fan, the site conditions and the noise control requirements, different noise control schemes and measures can be selected. Generally, it can be divided into the installation of sound insulation cover, installation of muffler, vibration reduction and vibration isolation measures.

Nanchang Jialu Environmental Protection Engineering Co., Ltd. is an engineering technology company specializing in fan noise control and fan noise reduction, integrating product development, design, acoustic solutions and construction. It specializes in comprehensive control and research of wind turbine noise and vibration. Fan noise, for different types of fan equipment and fan room noise control, to provide users with on-site noise survey, analysis, provide system fan noise solutions and construction services.

Nanchang Jialu Environmental Protection Engineering Co., Ltd. is a powerful technical development and design team composed of many noise control experts with strong technical force. The company has a stable and mature installation and construction team. It has excellent performance and good reputation in the fields of noise control, vibration control and acoustic equipment. It has professional service level in design capability, engineering quality and technical operation.