发布日期：2018-04-09 作者：空气源热泵 点击：
The noise source analysis of air source heat pump unit is called noise of heat pump unit, noise of heat pump, noise of heat pump, noise of heat pump unit and structural noise of heat pump unit. It belongs to the noise of physical property. Generally, the noise of heat pump units can be treated by vibration isolation, muffler and sound insulation according to the different modes of noise transmission. Air source heat pump belongs to low frequency noise. The main characteristics of low frequency noise are slow attenuation, long sound wave and strong penetrating ability, so low frequency noise is not easy to handle.
1. The measured noise level of large heat pump is different from the noise index provided by the seller or the noise level indicated on the sample, and the measured noise should exceed 3~10dB. The general heat pump A sound level noise is 79~82dB, and some heat pumps are more than 90dB. If a number of heat pumps are installed near the residential building or on the office roof, the noise of the heat pump must have a greater impact on the surrounding environment.
2. The noise of large-scale heat pump is open, the noise mainly radiates from both sides and top of the heat pump, and the area of radiation noise is larger. The number of rows as the top of the fan, there are more than hundred units, a total area of more than 12m2, on both sides of the area also has a dozen square meters, the noise from the spread in such a large area, a large area of effect, slow attenuation, in the range of 3M on both sides of pump noise basically no attenuation within the heat pump length distance the decay rate of 3dB.
3, the noise frequency characteristics of the heat pump are generally neutral low frequency, the main noise frequency is 63~500Hz, the low-frequency noise attenuation is slow, the influence scope is wide, and it is not easy to eliminate.
4, because the bottom of the general heat pump is often not fully closed chassis, only the steel frame, compressors are supported on the framework, so the noise also spread down from the bottom. If the heat pump is mounted on the roof, the downward noise is reflected by the floor, and if it is installed on a flat surface with gaps or holes, the noise will spread through the gap or hole.
The above is the introduction of air source heat pump unit knowledge, I believe you have a profound understanding of our products, if any problems do not understand, welcome to inquire, we sincerely welcome your presence.