Qingdao Huichengda is a professional company specializing in the noise control of air conditioning units and fan units, offering comprehensive services including scheme design and construction; welcome to call for consultation: 135-8923-4506, Manager Liu.
Outdoor AC Unit Noise Source Analysis
One,The outdoor unit of the air conditioner is not securely installed, and the installation position is too high. When the compressor is running, it's prone to cause wall resonance, resulting in low-frequency noise, commonly known as the "hummm..." sound. It is recommended to install it on the concrete beam at floor level for the most stability and minimal noise.
Two,An air conditioner installation was uneven, resulting in a high and low discrepancy that caused cabinet vibration.
ThreeThe pipeline connections are not securely fastened, causing them to collide with the housing and generate noise.
FourOutdoor Unit Quality Issue:a. The air conditioner compressor generates excessive internal noise;
b. Resonant noise in the housing is caused by loose mounting screws;
c. Noise is produced due to deformed fan blades.
Five,During the installation of the outdoor unit, insufficient consideration was given to vibration isolation and noise reduction, creating a potential noise hazard.
Outdoor air conditioning units and their brackets, as well as walls, are "hardly connected." When the outdoor unit operates, it resonates with the brackets and walls, creating solid sound transmission and resulting in low-frequency noise. With current technology, it is impossible to eliminate low-frequency noise completely; we can only strive to reduce the noise to a level that is tolerable to people.
Governance Challenges
Noise control for outdoor air conditioning units is a common treatment project, but it poses significant challenges, mainly due to:
1、How to achieve our acoustic design goals with the least amount of noise control, vibration reduction products, and engineering?
2、After installing noise control equipment, it must not affect the normal operation of the outdoor air conditioning units.
Summary of Governance Measures
The noise reduction of air conditioner outdoor units involves a variety of products and equipment, such as mufflers, noise-reducing louvers, acoustic screens, sound-insulating enclosures, and vibration isolators.
1、Inspect the outdoor unit's installation location for suitability and ensure it is level.
2、Vibration-damping elastic installation for outdoor units reduces low-frequency noise generated by the "rigid connection" between the outdoor unit and the bracket.
3、Acoustic treatment for ventilation system pipes, installation of noise reduction equipment, and creation of noise-reducing air ducts.
4、The silencer primarily addresses the noise from the fan on the engine's top, serving as the main noise control measure. Circular silencers can be installed on each fan, or a single, integrated rectangular silencer can be used.
5、Soundproof enclosures and noise barriers are primarily used to control the overall noise of the equipment. When noise pollution is severe, both noise barriers and localized soundproof enclosures may be applied.